SCIENTIFIC ABSTRACT DUKHIN, A.I. - DUKHIN, S.S.

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• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000411510010-8
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• Document Creation Date: January 3, 2017
• Document Release Date: July 27, 2000
• Sequence Number: 10
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

S/137/62/000/003/023/191
AOO6/A10l
AUTHORS: Neymark, V. Ys., L)t~ ~61, `
TITLE: The effect of modifiers on the structure, deformation of the crust,
and the solidification rate of a steel ingot
PERIODICAL: Referativnyy thurnal, Metallurglya, no. 3, 1962, 44, abstract 3V270
7("Sb. tr. In-t metalloved. i fiz. metallov Tsentr. n.-i. in-ta
chernoy metallurgli", 1959, no. 6, 39-62)
1 The effect 6f modifiers on the deformability and solidification rate
of the crust was investigated on hollow ingots produced by the method of vacuum
crystallization. The following steel grades were elected for the investigationt
CT.3 (St.3) carbon, )(27 M27) ferrite; X18H9 (Khl") and X23H18 (Kh23N18)
austenite steels and nA-1 res of Ti, Zr. B, Al, MS, N, Ca. Deformation of the
steel crust was characterized by the degree of difference in the wall thielmess
of the hollow ingot: ((6 -Ct)/67 - 100% where a. Is the minimum and 6 the maximum
thickness of the ring. Rings of equal height were cut at 100 mm distance from
the lower ingot end. The solidification rate of the steel crust was determined
from the weight - length ratio of the cut-out ring. For steel malting, standard
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S/137/62/000/003/023/191-
The effect of.modifiers on the structure ... A006^101
charge materials were used, such as Armco-Pe, St.10-10, NiOOO and Fe-Cr-0000
steels. The steels were melted In 50-kg high-frequency and I ton-electric are
furnaces. Hollow ingots were produced In vacuum steel molds with 90 m Internal
diameter and 130 mm external dIameter. From each heat produced In a high-fre-
quency furnace, 4 hollow ingots were obtained: one without admixtures and three
with admixtures of different concentrations. 7be admixtures were introduced
directly Into the furnace prior to the teeming of the metal. Heats from the are
f!rnace were teemed into 50-kg ladles where the corresponding admixtures had
been preliminarily introduced. Then the hollow ingots were taken off. It was
established that when adding 0.005% B the difference In the thickness of walls
of hollow ingots decreases from 41% (hollow ingot without admixture) to 24.3%.
If B concentration is raised to 0.01% the difference is 18%, and at 0.05% B it
decreases down to 12.5%. Additions of B considerably increase the solidification
rate of hollow St.3 steel ingots. When adding 0.2% Ti, the difference in the
thickness of walls decreases from 35 to 21.7%. The addition of 0.1% Ti raised
the solidification rate of a hollow ingot by 20, and 0.2% Ti. by 1N. 'llie
addition of 0.1% Zr reduced the difference in the wall thickness of hollow St.3
steel ingots from 35 to 21.5% and 0.2% Zr to 17.1%; Zr considerably increases
the solidification rate of hollow ingotai 0.1% Zr by 37.%,- 0.2% Zr by 30% and
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3/137/6Z/bW/003/023/191
The effect or modifiera on the structure A006/A101
0.3% Zr by A%. Additions of B and Ti did not considerably affect the difference
In the wall thickness of hollow XhZ7 steel ingots, but the solidification rate of
the Ingot Increased bY 34% when adding 0.01% B and by 22% when adding 0.3% Ti.
TI and Zr introduced jointly to the molten metal (0.6% T1 and 0.3% Zr) reduced
deformation from 29.4 to 1.5% and increased the solidification rate of )Qi23NI8
steel crust by 13 - 1E%. Modifiers in optimum concentrations substantially
affect the macrostructure of a St.3 ingot; B in a 0.003 - 0.005% concentration,
eliminates the columnar structure of an ingot; Ti and Zr promote the formation
of a homogeneous columnar structure with very fine crystals. B and T1 refine
strongly the dendritio atiructure of KhISW and Kh23Nl8 steel at a high crystal-
lization rate. There are 15 references.
0. Lyubimova
(Abstracter's notes Complete translation]
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18(0) PHASE I BOOK EXPLOITATION SOV/2125
TeentralInyy nauchno-inaledovatellskiy institut ohernoy metallurgii.
Institut NotallovedonLya. I fLzIkI metallov
Problemy metallovedeniya I fisiki metallov (Problems in Ptiyeical
Metallurgy and Netallophysion) Moscow Met&Uurgizdat, 1959.
540 p. (Series: Its: 3bornik trudov., Errata slip inserted.
3,600 copies printed.
Additional Sponsoring-Agenoy: USSR. Gosudaretvonnaya planova komia3lya.
Ed. of Publishing House: Ye.N. Berlin; Tech. Ed.: P.G. Islent' eva;
Editorial Board: D.S. Kamenetakaya, B.Ya. Lyubov (Rasp. Nd.l..
Ye.Z. Spektor, L.N. Utevskly, L.A. Shvartsman, and V.I. Malkin.
PURPOSE: This book in Intended for metallurgists, metallurgical
engineers, and specialists In the physics of metals.
COVERAGE: The papers in this collection present the results of
investigations conducted between 1954 and 1956. Subjects
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Problems in Physical Metallurgy (Cont.) SOV/2125
covered Inolude crystallization of metals, physical methods of
influencing the processes of crystallization, problems In the
physical chsmistr7 of metallurgical processes, development of
new methodsaq0 equipment for investigating metals, and
--production-control-i- Referenoes-follow- each- article.-
TABLE OF CONITUTS:
PART 1. WWALLIZATIQU OF METALS
Dukh1n, A.I., Candidate of Physical and Mathematical Sciences.
Crystallization of Metals and Alloys in Small Volumes 9
DuX)-dnp.A.X,, and V.Ye, Neymark, Candidate of Physical and
RiWw-iitibil Solenoes. Iffeat, of Boron and Titanium on the
Supercooling of fteal 34
The results 6f measuring the supercooling of stools lead to
the concluslon that the energy of nucleation,in-type-KhMN9
austenitic steel in much greater than in type-Kh2T forritic
steel. This explains the difficulty of refining the grain
of ingots of KM899 steel by means of additions of titaniuYj
and boron, as well as the ease of refining the gain of XIP.Z'(
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Problems in Physical Metallurgy (Cont.) SOV/2125
in
steel with the aid of seed.orystals. It was shown that modifyi
additions of titanium and boron diminish the capacity of Xh23mig
steel for significant supercooling. Titanium and boron, at
concentrations which produce minimurA supercooling of the melt,
refine the dendritio structure at rapid rates of solidification.
Neymark,, V.Ye., and A.I. DukhIn. Effect of Modifying Agents on the
Structure, Skin DeforvMZ1-6-n-,- jiM Solidification Rate of Steel
Ingots 39
Skin defects were revealed In ingots of four types of steel
(St. 3, Xh27, Kh23Nl8, and Khl8N9) by the vacuum-orystalli-
zation method. It was round that modifying agents (titanium,
zirconium, and boron) reduce skin defomation and accelerate
the skin-solifidication rate of these steels in varying
degrees. The results obtained suggeat that it would be
advisable to investigate the possIbility of using modifying
agents for lessening skin deformation and Increasing the
skin-solidirication rate In the continuous casting of steel.
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Problems in Physical Metallurgy (Cont.) SOV/2125
Kamenetakaya, D.S., Candidate of Physical " Mathematical
Science3j B.P..Rakhmanova; Ye.Z. Spektor; and V.I. Shiryayev.
The Mechanism lof the Effect of Aluminum on the Formation of
Crystallization Centers in Liquid Iron 63
Liquid primary iron (electrolytic and direct-reduotion) con-
taining no active undissolved impuritien or surface-active
dissolved impurities can easily be supercooled 26o-2TO* C
below the melting point. Nonactivated particles Of A120 Aave
little effect on the development of crystallization cenhre
In iron. But the start of the crystallization process In Iron
containing particles of A120j has an activating effect on the
particles and results in a d crease in supercooling capacity.
The introduction of small quantities of aluminum into iron
sharply reduces the supercooling capacity. The small degree
of supercooling in such cases is in accord with the fact
that additions of aluminum to steel act to refine the grain.
In view of the results of this Investigation and others, this
effect may be explaiied by the fact that small additions of
aluminum decrease the energy of nucleation in liquid iron.
Because of the surface activity of aluminum, nucleation can
take place spontaneously with but slight supercooling, as a
result of which a fine-grained cast structure is obtained.
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Problems in Physical Metallurgy (Cont.) SOV/2125
Malkin, V.I., Candidate of Technical Sciences. Mechanism of the
Growth of Crystallio Prom the Liquid Phase 76
Lyubov, B.Ya., Doctor of Physical and Mathematical Sciences, and
D.Ye Temkin. On the Theory of Crystallization in Large Volumes .84
Leontlyev, V.I. Effect of Ultrasonic Waves on the Crystallization
of --rn-gata--,
of__i _1tr "-waves through molt4a 14*t&JL--L
For effective Passage A aaO40,
It is necessary- to establIsh a definite Unit of specific
ultrasonic power. The time necessary for action of the waves on
the molten metal must exceed a certain minimum, but at the
-3ame time n'eed not be as great as that required for complete
solidific-atio-n.--%tter~--e$Ults-are LL obtained with the-use of
wider ingot molds and slower cooling. Ultrasonic waves induce
intensive crystallization in all directions from numerous
nuclei, the fomation of which is aided by the action of the
waves.
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Problems In Physical Metallurgy (Cont.) SOV/2125
Gurevich, Ya.B., Candidate of Technical Sciences; V.I. Leontlyevj
and I.I. Teum1n, Candidate of Physical and Mathematical Sciences.
Effect of Elastic Vibrations During Crystallization on the
Structure, Mechanical Properties, and Deformability of Kh2T
and W5Y2O Steel 11T
The application of elastic vibrations during crystallization
re3ults in a marked refinement of the grain. The linear
dimensions of the grains axe 3-5 *ImeB smaller than those of
ordinary grains. Columnar crystals are almost entirely
lacking. In addition,, nonmetallic inclusions are relatively
small and uniformly distributed. The mechanical properties
of both types of steel are improved,
Neymark, V.Ye. Application of the Vacuum-Cryatallization Method
for Producing Hollow High-alloy Steel Ingots for Rolling Into
Tubes 13T
This method is recommended for the production of high-
quality thin-walled ingots (blanks). in oases where the
blanks are long and thich-walled, or short and thin-walled,
the centrifugal-oasting method is preferred. The vacuum-
crystallization method is still In the experimental stage,
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Problems in Physical Metallurgy (Cont.) SOV/2125
'but Is already being used at several Soviet machine-building
'plants for producing hollow cylindrical blanks from
nonferrous metals and alloys.
Yemyashev, A.V.j.A..M, Zubko, Candidate of Physical and Mathematical
Sciences; and V.Ye. Neymark. On the Effect of Vacuum Melting and
Teeming on Metal Properties and Ingot Quality 16,0
Zelanov,,.A.N.,, and D.S. Kamenetakaya. Effect of Inert Gas
Pressure In the Furnace on Oas Content in the Metal
The content of nitrogen and hydrogen in metal melted in an
atmosphere of argon at a pressure of 1-450 mm. Hg has little
relationship to the pressure of 'the argon and is considerably
lower than In the original charge. The inert gas must be
purified of oxygen if a pressure is used at which the partial
pressure of oxygen would exceed 0.01 mg. Hg. The same applies
to nitrogen contained in the Inert gas, provided the nitrogen
reacts with the:metal.
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187

Problems in Physical Metallurgy (Cont.) SOV/2125
Gorbatenkop AXP and D.S. Kamenetakaya. On the Shape of
Equilibrium Curves of Binary Alloys 191
PART 11. PHYSICAL CHEMISTRY OF WrALLURGICAL PROCESSES
Tomilin, I.A., Candidate or Technical Sciences, and L.A. Shvarts-
man, Doctor of Chemical Sciences. Effect of Silica, Calcium
Oxide, and Sodium Oxide on the Distribution of Sulfur and
Phosphorus In.I.-on and Ferruginous Slag 199
It was found that the heat of transfer of sulfur from Iron
to slag in the Aystem FeO-SI02, saturated with silica, is
decreased by the addition of CaO to the slag. At a conoen-
tration of about 20 percent CaO the heat of reaction amounts
to some 13,000 cal./g. atom, which coincides with the heat
of transfer of sulfur from iron to ferruginous slag. Further,
on increasing the content of CaO in the slag, a certain
increase in entropy takes place. An overall result of these
processes Is a reduction in the value of the coefficients of
sulfur distribution in comparison with aoid slag not containing
CaO. The introduction of Na2O Into the slag causes the same
phenomenon to take place, but in a greater degree. These
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Problems in Physical Metallurgy (Cont.) SOV/2125
facts may be explained by the Specific Interaction of ions In
the acid rusion. The free energy of solution of solid iron
sulfide In ferruginoue and ferruginou3-3illeate slags was
calculated. It was shown that the heat of transfer of
phosphorus from Iron to acid slag does not differ from the
corresponding figure in the case of ferruginous slag. The
coefficients of diffusion of phosphorus, however, are con-
siderably less In the first case than in the second, This can
be explained by the presence of a *structure* of silicate
polymers In the acid slag. Additions of CaO and Na20 to acid
slag increase the heat of reaction of dephosphorization, and
at the same time the values of the coefficients of distribution
rise.
Kozhevnikov, I.YU., Candidate of Technical Sciences, and
L.A. Shvartsman. Effect of Oxides of Alkali Earth Metals on
the Equilibrium of the Dephosphorization Reaction of Iron 221
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Problems in Physical Metallurgy (Cont.) SOV/2125
Petrova, Ye'.F., ar,4 L.A. Shvartsman. Effect of Alloying
Elements on the Thermodynamic Activity or Carbon In Gamma Iron 259
It is shown that the activity of carbon in gamma iron con-
taining additions of Mn. Cr. V, and Ti is considerably
higher than in non-alloyed austenite. This would indicate
that the bond strength of carbon dissolved In gamma iron
is substantially increased by the introduction of carbide-
forming elemonts.
VIntaykIn,, Ye.Z. Methods of Determining Vapor Pressure Over
Metals and Alloys 293
MalkIn,, V.I. Measurement of Crystallization Rates in Slags of
the System CaO-.A4g'o 3- SiO2 306
For ~.-wo slags of this system a determination was made of
the relationship between temperature and rate of crystalli-
zation in the temperature range of the vitreous state.
Within a narrow temperature range this relationship can be
described by a simple exponential law. Determinations were
also made of the energy of activation of the rate of
crystallization. The high value of the energy of activation
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Problems in Physical Metallurgy (Cont.) SOV/2125
for slag consistigg of 23 percent CaO. 18 percent A1201, and
59 percent SiO2 ( #000 k cal./mol) a's co-cpared with tKat for
slag consisting of 23 percent CaO, 32 percent A1203, and
45 percent SiO2 indicates the presence of cationic aluminum
in these slags.
Malkin, V.I., and L.A. Shvartsman. Change in the Transport
Number of the NO Ion in Fused Sodium Silicate 311
Malkin, V.I,, V.V. Pokidynhey, S.F. Khokhlov, and
L.A. Shvartsman. The Effect of an Electric Current Passed
Through the Slag-Metal Boundary in the Desulfurization Process
of Plg-Iron --314-
OsIpov, A.L. L.A. Shvartsman PV.Ye. Iudin; and H.L. Sazonov.
On the Uniform Distribution of a Small Addit~on In the S a9
During the Production of Steel in a 350-ton LOpen-hearthi
Furnace 318
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Problems In Physical Metallurgy (Cont.) SOV/2125
The distribution process was studied with the use of a radio-
active isotope Ni45). It was shown that the process of
diffusion of a substance In slag takes place at a consider-
ably slower rate than in metal.
Shvarteman, L.A,, A.I. OcIpovj, V,I. Alekseyev, V.F. Surov,
M.L. Sazonov, X.T., Bullskiy, S.A. Telesov, A.M. Skrebtsov,
A.M. Ofengenden, L.G. Golldshteyn and F.F Sviridenko. An
Investigation of the Kinetics of Acrap MeliIng in the
Scrap-Ore Proaess 326
A method for determining the speed of melting scrap in
an open-hearth furnace In the acrap-ore process was
developed on'the basis of this investigation. The method
Is based on "isotopic dilution* using radioaotive cobalt.
It was shown that the melting speed depends on the duration
of the pig Iron pouring process and carbon content in the
b&th.
Stuparl, S.M. Investigation of the Transfer of Sulfur from
the Gas Phase to the Bath in the Basic Open-hearth Purnace 344
The transfer of sulfur from the gas phaso to the bath
takes place most intensively during the loading of the
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Problems In Physical Metallurgy (Cont.) SOV/2125
metallic portion of the charge. The speed of sulfur absorption
during this period is 1T-25 percentper hour,, during pro-
heating 8-11 percent, and during final melting 3-T-5 percent.
Percentage.le based on the sulfur content In the metal.
PART Ill. WHODS AND EqUIPMENT
Perkas, M.D., Candidate of Technical Sciences. Determination of
the Depth of Decarburized and Carburized Layers by the X-ray
Method 363
The maximum carbon content in the specimen was found to be
not of the surface but at some depth (0.1-0.2 mm.) from
the surface.
Zubko, A.M., Candidate of Physical and Mathematical Sciences, and
Ye.Z. Spektor. A Quantitative Method for Determining the
Graphitization of Coke in the Blast Furnace 372
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Problems In Physical Metallurgy (Cont.) SOV/2125
Lyashchenko,, B.G. On the Possibility of Localizing Carbon
Atoms in the Austenite Crystal Lattice by the Neutron
Diffract.ton Method 378
Litevokly, I.M., Candidate of Technical Sciences. Some Problems
Concerning the Semidirect Investigation of Multiphase Alloys
by the Electron Microscope Method ~381
Zakharov,.A.I. Determining the Integral Neutron Flux During
the Bombardment of Materials in a Nuclear Reactor 389
Felinger, A.K. Controlling the Output Current of a Photo-
electric Multiplier- 394
It is possible to control the output current and amplifi-
cation coefficient of an electric multiplier (FEU) by
varying the voltage of one of the diodes.
Afanaslyev, V.N. One Possible Method of Constructing a
Multichannel Amplitude Analyzer 397
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Problems in Physical Metallurgy (Cont.) SOV/2125
Pliskin, YU.S. Method of Designing Installations for Levitation
Melting of Metals.. 401
Methods of levitation melting of metals are compared, and a
simple method of designing an inductor sufficiently accurate
for practical purposes is proposed.
Teumins 1,X. PrIngiplee of Designing Magnstostriative
Vibrators' 412
Basic principles of designing magnitostriative vibration
for untruonic' industrial equipment are presented. Special
attention is given to the analysis of operating conditions
in machining crystallizing metals and alloys
Latyshev, V.K., and A.K. Felinger. Logarithmic Electron Con-
verter for Type XF-4 Microphotometer 453
Tatochenko, L.K., Yu-V. Hoysh, V.V. Lyndin, and B.S. Tokmakov.
Magnetic Partials Inspection Method Used in'Metallurgy 460
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Problems in Physical Metallurgy (Coat.) SOV/2125
Zakharov, A.I. Proportional Neutron Counters Uti3lzing Boron
Trifluoride 466
The author states that, ordi narily, gas obtained from the
composition of a solt by heating is used in proportional
neutron counters. However, he further states, BP3 obtained
from glass containers is also effective.
Kornev,Yu.V.,, Candidate of Physical and Mathematical Sciences.
A Simple Electronic Magnetic Spectrometer for Identifying
Radioactive Isotopes 481
A simple portable design of a beta-spectrometer based on
focusing electrons by means of a transverse uniform mag-
netic field Is described.
Tatochenko, L,K., and V,V. Lyndin. Instrument for Rapid
Determination or the Curie Point 485
The instrument described is successfully being used at
the TsNIIChM for investigating properties of ferromegnetio
alloys.
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Problems in Physical Metallurgy (Cont.) SOV/2125
Afanaslyevp VA Remote-oontrol Radlonsters for Radiometrio
Investigation-of.Cortain Blast Furnace Production Processes 492
Latyahey, VA. Us of Radioactive Isotopes for Measuring
Levels lof liquidal 499
Latyshev, V.K., Yu.S. Pliskin, and L.K. Tatoehanko. Automatic
Level Regulator for a Continuous Steel-oastin,& Installation 512
Spasakiy, M.N., and L.M. Utevakiy. High-frequincy Vacuum
Melting Furnace, 520
Gurevich, Yu.V., and V.Ye. Neymark. Selection of Conditions for
DeformIng Types 11530 and 91533 Stools in the Cast State 527
The strength and plasticity of high-alloy stools, types
B1533 and B1530,, are sharply reduced with an increase In
temperature. Mechanical properties of these stools were
investigated in order to determine the possibility or
improving their strength and plasticity at elevated tempera-
tures by means of alloy treating or by diffusion annealing.
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Problems In Physical Metallurgy (Cont.) SOV/2125
It was found that a substantial, ine ABe in plasticity
re3ults from the addition of 0,1-0.21 percent, Al and
0.2-0.3 percent Ba-Al alloy. Addition of Titanium greatly
reduces the plasticity.
Tokmakov V.S. Faperience Gained in the Use of Gamma-ray Flaw-
detectioA Method In Metallurgy 537
Experience~gained in the use of radioactive isotopes for
the purpose of.flaw detection has shown that it Is possible
to use th-ts-method in checking castings and welded
structures.
AVAILABIZ: Library of Congress
.00/jmr
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A160/Alol
AUTHORz _Dukh1n, A. I.
TITI'Ei Crystallization of metalsand alloys in small volumes
FFMODICALs Referativnyy zhurnal, Metallurgiya, no. 6, 1962, 4, abstract 6126
("Sb. tr. In-t metalloved. i fiz. metallov Tsentr. n.-i. in-ta
chernoy metallurgii",-v. 6, 1959, 9 - 33)
TM: The undercooling of Sn, Bi and Fe with small additions of Al and C
was investigated by the method of microvolumes. The investigations were carried
out In a vacuum and In the atmosphere of purified argon in a specially-built
nhamber at cooling rates of 100 - 500 degrees/see. It was determined that the
drops of B1 and Sn with a diameter of 40 - 50/Awually andercool by 110 and 1150C
respectively, and In drops of 200 - 300 ~4 the undercooling reaches 60 - 800C. In
the latter case, a dependence of the undercooling on the overheating is noted.
11ils is an Indication for the appearance of crystallization centers on foreign
a&nIx+mre particles. In case the drops are of smaller sizes (UP to 50,"), the ob-
tain-d maximum undercoolings do not depend on preliminAry overheatings. Based on
C ard 112

A
S/137/62/000/006/090/163
Crystallization of metals and alloys in small volumes A160/AlOl
thda fact, a conclusion is drawn on a spontaneous crystallization. As regards
?e, the maximum undercoolings reached 500 - 5500C, which, as claimed by the
aUth0r, were practically the same for drops of 50 and 500,4 and depended neither
or, the overheating nor on the rate of undercooling which varied from 100 to 600
degroe3/sec. Additions of C decreased the undercooling to temperatures of 180 -
230~`c which almost did not change at concentrations of 0.8 - 5.15% of C. Addi-
tiens of 0.005 and 0.08% Al decreased the undercooling of Fe to 290 and 2300C,
respectively. It is assumed that both C and Al act as substances which lower the
s~irface tension. There are 29 references.
D. Ovsiyenko
(Atstracter's notei Complete translation]
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BMSOVS V.T.; DUKHD, A.I.
Temperalim measurement during the growth of metal crystalip-
from melts. Fit. vatimetalloved. 11 no.6:893-.898 Je 161.
(KIRA WO
1. Institut metalloWeniya i flziki metallov TSentrallnogo'
nsUchno-issledovatellskogo instituta chernoy metallurgii.
(Metal orystals-Growth)
(Thmuccouples)
A

S/070/62/007/002/012/022
4. E132/E160
AUTHORSt Borisov, V.To, and Dukhin, A.I.
TITLE. influence of thermal regime on the structure of the
crystalline front in on*-component systems
PURIODICALi Kristallograf'iya, v-7, no.2, 1962, 280-285
TEXT: The principle of the maximum rate of growth is
numerically applied to establish the relationship between the
dimensions of the crystals in the crystallisation front and the
rate of advance of the front (velocity V). In the part of the
theoretical curve of V aSainst supercooling, the appropriate
form for the crystals to take where the curve rises in that of
coarse needles, and in the part of the same curve whore V
falls, fine needles. The change of the dimensions of the
crystals in the intermediate region leads to the appearance of
a plateau. Observations made on crystals of salol growing in a
film between two*glasa plates or on a thick copper plate confirm
the theoretical deductions.
There are 5 figures*
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S/070/62/007/002/012/022
Influence of thermal regime on the ... E132/El6o
ASSOCIATIONs Insti tut metallovedeniya i fiziki metallov
(Inatitute of Science of Metals and Physiur. of
Metals,)
Tsentrallnogo nauchno-is3loikovatellskogo instituta
chernoy metallurgii im. I.P. Bardina
(Central Scientific Research Inst;Ltute of Ferrous
Metallurgy imeni I.P. Bardin)
SUBMITTED: June 27, 1961

0-11 .~-- . t ." . , - - ~ :~, - . ,,, ., ;~ . : . -.- ; ., 1 1. .~ . . 11 - ;11 - I -. - L-L4
BMISOV. T.T.1 DVW*q A.1.1 MA?VtYffp Ytt.Y*.
Problems In the theory at' Motal growth In netal systans. Probl.
netalloved. I f1s. not. no.806,9~-280, #64. (MRA 1817)

'-'#1P(q)/ZW-jW/S0fF(B)/aD3 AF
-ACCESSION NR: AT3001925 '/091inz/000006/027910284
AUTHORS: Borisov, V. T.1 DukhLn, A. 4 Matveyev, Yu. Ye.
TITLE: On the mechanism of the growth of metalliccrystals
SOURCE: Kristallizatsiya i fazovy" perekhody. Minsk. lzd-vo AN SSSP,
196Z, Z79-Z64
TOPIC TAGS: crystal, crystaWzationp crystallography, single -component, b"ry,.
phase, phase discontinuity, boundary. Hg, Cd, K. Sn. Zn. Fb, growth. pMsa diagram.
equilibrium, kinetic, soltdus, liquidus
ABSTRACT: The paper 'discusses an expression for the rate of the displacement I
I a single-
of a planar pha s a -discontinuity boundary during the crystallization (CR) of
component substancp generally adopted by a number of authors (for a.-.mraple, 0. Z.!
Jantsch, Kristallographie v.108, 1956, 185), an expression which has an extremely
,-eneral character and rna~ be employed in the dascription of CR from a vapor, a
solution, or a fusion, also in the theory of phase transformations ~~'Souds' and
evcn In the theory of spiral growth. 1. It is noted that an yet W;k# are no depand"i
able cxperimen tal data on the measurement of the supercooling 06 the surface of
t,row~ng crystals. Among aU the tests surveyed the author decries the absence of
Card 1/3

L 193')1-63
ACCESSION NR: AT3001925
even a single Ideno4cation of a specific degree of super lin howevers tome
c 00 'g
uppur-bound estimates of its value for groping crystals of F rNO'lind XVere
obtained in referenc~id test reports. Literaturi on the calculation of the density of
groveth points, an essential parameter in the understanding of the growth of metal-,
lic crystals, both kr spiral growth (for ifoolated spirals) and for growth on two-
dimensional nuclei. Js cited. IL Whereas the Lnitial equation given determines the
rate of growth'of a jingle -component liquid substance for a given degree of super,-t
cooling, a separat' :discussion is made of the analogous problem on the magnitude
of the rate of dispiacement of the phas a-dis continuity boundary In a binary system
under a specified deviation of the state of the system from an equilibrium state*
The expressions obtained give rise to nonequilibrium phase diagrams in a
tcrnperature-va.-composition coordinate system. A plurality of such diagrams do.
tcrmMes the kinetics of the CR of the alloy under different conditions. It is showw
that the system of equations obtained is in affect analogous to the first kinetic
equation obtained for the single -component substance, except that In the binary
system the rate of growth of a given phase is determined by two kinetic coefficients...
In mcas.urcm "ents M#de of the temperature (T) along the CR front in the systems
Sn-Zn'.tnd Sn uthors observed a displacement of the T at the beginning
Sh 09 a a
fk 4
0 f t I -c t %V o - aA e of the alloys (counted from the liquidus) that is proportional
to the rate of grov(t~ and the concentration of the second component and which
Ccrd Z/3

,L 19-)9i-63
ACCESSION NR: AT3001925
arnounts to a few degrees Cat growth rate's''of 3-5 rnm/gec. rhconcjucjcnjtjs~t
noted that in nondiffusional CPL of alloys the Clk of the liquid proce6da always V
a change in composition, even whea the state of the cryotallizing alloy is deter-
mined by a representative Point that lies below the solidus of the equilibrium
phase diagraLm. Orig. a rt. has I figure and 6 equations.
ASSOCIATION: none
SUBMITTED: 00
SUB CODE- CH, PH. MA, EL
r-a.d 3/3
DATE ACQ: 16Apr63 ENCL:' 00
INO REF SOV: 005 OTHER: 003

L 19~111_1__3 Z_* AhFT.
u 00/ 0-,%C) 02jes;
5 91 210SD
XCCESSIO124 NR: AT300192 8/0/0 8
AUTHORS: _Borliov. V.T.; Dukhin, A.L
~TITLE: Effect of the thermal regime on the shape of columnar SjyLt&jj
SOURCE: KristAllizatslya. i faxovyye perekhody. J~insk, Izd-vo AN BSSR,
196Z, Z85-288
TOPIC TAGS: crystal, crystalli,zation, crystallography, maximum-rate principla,!
front, growth, growth rate, spheroUte, salol, fissure..
:ABSTRACT: Thei paper describes results of an experimental investigation of the
maximum possible rate of displacement (RD) of the crystallization (CR) front (F)
under given external thermal conditions. The RD of the GR F, depends'on the
degree of supercooling at the surface of the growing crystals. The tests were made
on salol. The crystal growth was observed and photographed for different bath tera-
peratures (T). It is noted that the structures characteristic for each T are readily
reproducible. The multiplication of the number of crystals per unit length of the CR
F appears to be due to the formation of fissures, near which fan-shaped groups of',,
small 9 lightly-dis oriented crystals are formed. A decrease in the number of cryc-
.tals per unit length is occasioned by the development of pinching-out processes.
Card 1/2

L 19392-63
ACCESSION KR: AT3001926
The results of the present study show that the equilibrium between these two
counteracting factors is regulated by the heat regime in accordance with the princi~
pla of maximum growth rate. A schematic graphic plot shows that the rate of
growth of the crystals vs.T achieves a certain plateau-like constant regionwith a
drop-off at either side. Experimental data supporting this conclusion are cited. It
is postulated that the appearance of the plateau is Unkad with a change In the struc-
ture of the CR F and, more specifically, a comminution of the crystals with a de-',
crease In the bath T. It is also concluded that If an experimental determination in
m.ade simultaneously of the RD of the CR F and Its structure as functions of the
bath T, then the crystals must be large on those segments of the curve where an In:.
crease in rate of growth occurs, must than progressively decrease in size as the T
is reduced over the segments of constant rate of growth, and must invariably have
a fine structure (with a planar CR F) along the descending branches of the curve.
rhe experimental results of the measurements of t~e linear rate of growth and of
tho size of the crystals, adduced in a graph, support this postulated relationskip.
Orig. art. has 4 figures.
ASSOCLATION: none
SUBMITTED. 00 DATE ACQ: 164pr63- ENCL: 00
SUB CODE: CH. PH. MA NO REF SOV: 003 OT14ER: 000
Card Z/ Z

Mnn. A.Z.
correatios or ounica and morphaxogicai aspects of matwe
spougloblastowaa. Topr.aolrokhir. no.2:32-37 Xr-Ap 150.(CUM 190)
1. Of the DoWtstut of Nervous ftwoot, MY Kedical Institute
(Read of Dqortamt - Acadealclan B.N.Kanlkorokly) and of the
7athosorphological Dqwrtaout, My Psychoneuralegical Institute
(1"& of Dqwtvant - Prof. 3.8,Khoninakly).

1. A.L.1 WMAnMLYA. 0.O.
ftnors of the occipital lobe 61MMI&HAN lesions of the
posterior onmial foes&. Top.n*irokW. 19 no.5s4l-47
84 t5se . (MLIA 82:11)
1. Is Instituts
USSR,
(OCOIPITAL
differs
noy"khtrurgit KInisterstva. s4ravaukhrumul"
MDR. nooplasus.
diage from tumrs of posterior cranial foes&)

EXCERPTA HEDICA Sea.6 Val.U/I Intemal Ned. Jan 57
P UJOIN A 4.
134. QUICHIN - A. L. ard FROLKIS V. V. Med. Inst., Kieff. 4T r o ph I c c h a n -
j_* i -rn corr*spqnding segment of the spinal cord
In myocardial infarction (Russian text) KLIN. MED. (Moak.)
1955. 33/5 (74-77)
This study is based an Dykow's theory that in all the viscera 'Interoceptors' are
present. the excitation of which in transmitted to the spinal cord, where it may
produce 2 kinds of reactions: (1) those modifying the physiological behaviour of
the medullary segments (excitability. reflex time, etc.) or (2) those prod I
uc n
motor renexte. The appearance of these reactions depends on the condition of
the viscera, their receptors, the nature and the intensity of the stimulus. and
on the condition of the marrow. This Is illustrated by the change In muscular
tone of the lower limbs in spastic paralysis. according to whether the Wadder in
full or empty. Excitation of the receptors of the heart may be produced by dif-
ferent factors, mich as anoxia, accumulation of metabolites. and even the rhyth-
mic activity of the myocardium itsell. U the heart Is excluded from the circula-
tion. the latter being maintained by pumping blood into the aorta, the reflex time -
(Tark) Is prolonged. Strain of the myocardium may produce 'correcting' reactions
of the spinal cord. Acute excitation of the myocardia3 receptors, as In obstru::-
tion of a branch of the coronary artery, may produte renex movements of the feet.
To this type of phenomena also belong the 'respiratory' movements of the extre-
mities due to coronary artery Insufficiency. i.e.. movements synchronous with
the rhythm of the respiration, similar to those observed experimentally when the
posterior roots of the spinal cord are cut. Myocardial anoxia lowers the threshold
of excitability of the spinal cord, and if there is sudden. Intense anorla. as In in-
farction, trophic centres may be affected. This explains the signs of dystrophy In
the shoulder NW left "m occurring frequently in Infarct. when Its clinical and
SOO picture ha" already improved. The excitation of the myocardial receptors.
due to Infarction, gives rise to Nactiond changes in the nerve cells. with a change
of their excitability with regard to the afferent neurons, but also of their troFide
laftumme on the peripberat avArons. Lev& - Bveroa Aires

TIMUB, I.D.; DMMIN, A.L.; SIRGH T*X9
On A,D, Dinaburg's articlo 6011aloal and physiological characteristied
of the hypertensive syndrome In supratentortal tumors of the brain*.
Topr. neirokhir. 21 no.200-32 Nr-Ap 157 (WaA 10:5)
1. Ukraiuskiy uLuctwo-issledovatellskly lustitut neyrokbirurgil.
(BUIll XXOPTASKS, onspl.
"rteneloa In supratentorial tumors. clin. aspects)
(HY I INNSION, atiol. and pathogen.
supratontortal tumors of brain)

r r . I.
%aww"Mom
Wbar syvtous In cerebral tuu*rs of varying histostracturo In the
last phase of the tvaoroum process. Trach.delo no.Wo)-606 is 159.
(MMA 12 t 12 )
1. lustitut usyrow I Muisterstva dravookhranonlya MR.

A., (XIYOT)
Syndromes of Priam an4 secoulary focal -lesions of the lbr&jr, stem
In cerebellar tumors [with sumuM In %gligh, p,64], Ir, oneirokhir.
23 no-101-35 159, 11 KMA 1213)
le Ukrainskly nauchno-Issledovatel'skly institut usyrokhtrurgil.
(CXRNBW&=X. neoplasms.
causiv ri?m A secondary f coal lesions of brain
at" kRus
.(BRAIN 82M. die.
and* of primary A secoMary focal lesions In care-
ballar rumors (Ras))

v

DUKHIN, A.L. j kand.=d.nauk (Xjysv)
Minleal, t=sors.of the brain atom and some problems in differential
dIagn9sis. Vracb. delo no.9t7le-79 8 161. (WA 24t12)
lo Nauchno-issledovatel'skiy inatitut neyrokhirurgii. NauchW
rWoovodital I - uslushmutyy dayatel I nauki, USSR9 chlen-korrespondent
AM SSSR A. I. Arutymov.
(BRA=-TUNDfC3) (DIAGN061S. DIMHMIAL)
I

DWMM~ A. L. ("Y)
---------
3o-ealUd irritativs brtin stax spdromes. Vop. neirokhirurgil
--- - - -- ---- -- - , -- (XIHA - -- -- - --- -
1. Ukrainakir nauchno-isslodmtellskiy institut neyrokhirargii,
(BRAINITUMORS) (CIPJMZLlal--TUKOFS)

DMINO L. L, I TUSMMM . T. F.
Path0gonests of bt*U Stan is in tusms of the oerebrus.,
""drow-
Vrach. delo no.6t4o-46 h 162. (MM 15:7)
1. Ukrainakly nauchno-Issledoutelloldy inatitut neyrokhirurgii.
(sum-mm)

ROMDANOV, A.P.# oti.-redq ZOZULYAp Tu.A#j zam* otv# redo;
AGASIMV-KONSTANTINOVSKlYt A.I.t red.1 KHOMINSKIY, B.S.,
red.j MOTMAN, M.X.$ red.; DUKHIN A L red.
[Problems of neurosurgeryl clinicalj pathopt7siological
and morphological principles In neurosurgical pathology]
PrcbleW neirokhirurgii; klinicheakie, patofiziologicbeskie
i rorfologicheskle z6konomernostl v neirokhirurgicheskoi
patologii, Kievp Zdorovlia,, 1964. 332 p. (KIPA 18-.9)
1. Ukrainskiy nauchno-iseledovatellskiy institut neyrokhirurgii,

wKwo 1. P.
DUKHIN, 1. P. -*The Npiological State and Productivity of lactating Cows
with Various Daily SchaddsesO Laboratory of the FIViology of Agri-
Cultural Animals. Yloscow, 19%. (Dissertation for the Degree of
Candidate in Biological Sciences.)
50.1 VnishWa Litopis',I.No ?S X956.

DUNHIS, I.P., kand.blol.nauk; SORDKIN, A.I,,, starshly nauchnyy
----~sotruftlk
Automatic ventilation and heating unit for farrowing
'houses. Svinovodstvo'13 no.llt4l-44 1 '59. (MIRA 13:2)
1. Sibirskly nauchno-Issledovatellskiy institut thivotwvod-
Styx.
(swine houses and equipment)
(Am buildings--Heating and ventilation)

A054/A127
AMIORSi Baklushin, L.N.; Gaydukovskly, N.V.; DuMin, I.S.1 - Engineers
TITLE: Electric-pulse machining of transverse flutes on grooves of rolls
for rolling alternating reinforcement sections
PERIODICAL: Stal', no. 4, 1962, 330 - 333
TEXT: The Eksperitrental'nyy nauchno-issledovatellskly Institut metallore-
zhushchykh at-ankov O"rimental Scientific Research Institute of Metal-Cutting
Machine Tools, ENIMS) and the Magnitogorskly metallurgicheskiy kombinat (Magnito-
gorsk Metallurgical Combine) have developed a pilot installation for fluting
rolls of elevated hardness by me,~ns of urdpolar electric pul3es of medium and
long duration (10-4 - 10-2 see). The pilot equipment was designed in cooperation L,00_'
with A.S. Opolknskiy (ENIMS), N.V. Gaydukovskiy, A.P. Shemyavich, I.L. Pi-isazh-
nyuk, G.M. Gubanishev and V.A. Bezobrazov (Kvx). By this method the metalls re-
moved directly from the rolls by the force of loaded particles. Consequently, I
the operating elements of the machine need only bo of simple design and their
number can be increased considerable (up to more than 20 grooves). The tool need
not be of exceptionally hard or strong material; it may also have various ampes';
Card 113

3/133/62/000/004/006/008
Elootric-pulse machining of transverse X05VA1127
the main object being that the shape In suitable for fluting at ahigh rate a
great number of grooves. An MrVt-2 (FDI-2) type machine generator was used for
the generation or the electric pulses (pulac frequency: 400/sec; average power
4-3 - 6.4 kw; current 80 - 100 amp; metal cutting rate (for steel) 1,200
1,500 =3/.nin; drive motor speed 3,000 rpm; its power: 6 kw). The pilot
equipment was reconstructed from an old horizontal milling machine. The electroda
Is a copper tubep coiled with trapezoidal copper wire; Uie pitch and number of
threp.ds correspond to the projections an the rolled rod. There are 3 patterns fcr 60,10
the interaction between the electrode and the roll (Fig. 1). Version II was used
on the pilot installation, ensuring a large contact surface between the roll to
be fluted and the electrode. In this version the electrode moves together with
the feed table and the roll rotates In the same direction. Version III of the
roll-electrode interaction, however, promises an even larger contact surface, in
spite of theprocess being intermittent, due to the reciprocating motion of the
electrode in thin case. The feed is controlled automatically. The machine must
be adjusted In such a way that there is no play of the roll In the direction of
the feed mechanism, that the electrode is fixed accurately in respect of the
groove axis axA that the peripheral speed of the roll is synchronized with the
linear speed of the electrode. The number of flutes to be eroded (the number of
-Card. 2/4

3/133./62./000/004/006/008
Electric-pulse machining of transverse .... A054/A127
jrD
threads on the electrode) can be calculated with z (D - roll diameter at
the groove bottom, I - pitch of fluting). The total depth of the flute Is ob-'
tained during one rovolution of the roll. The method is applied Inrolling No.
10 and 12 sections on the 250-1 small section rolling mill (barrel-diameter 300
mn; barrel length 750 mm; roll-neck diameter 160 mm; roll-neck length 260 mm).
After having tested rolls of various grades (alloyed cast iron, cast iron with an
elevated nickel content, etc) and of varying hardness (400 - 420 11B or 54 - 56
HSh, 55 - 65 H3h) it was found that for rolling No. 10 and 12 sections, rolls
made of chilled carbon cast iron with a barrel minimum hardness of 70HSh is the
most suitable for thda purpose. It is important that the working surface of the
electric-pulae machined rolls does not form any stable joint with the metal ro1W
and scale, which would spoil the groove. The inclination of the flute walls is
increased when the electric pulse method is used which improves the bond between
concrete and reinforcement. The new fluting method saves 3.5% of metal on an av-
erage during rolling and reduces the weight of 1 running meter of sections from
944 to 912 g (with new grooves) arA from 991 to 959 g (with worn. grooves). The
ser7ice life of electrd-pulse machined rolls in increased by a factor of 2.
There are 3 figures and 2 tables.
ASSOCIATION: Magnitogorskly metallurgicheakiy kombinat (Magnitogorsk Metallurgi-
cal Combine)
Card 3/4

'UZIMLNXOp A.M.; KUSTODAIEVO 0.0.;a SMIRNOV, B.I.j CRISHRO, A,G,j
GONCUROVAO R.Ts. - ~= N ~,- 3 -1
Renemb at Un KagidUqorBk Metallurgical Combine. Stall 22
no.8:742-743 Ap 162. (MIRA 15:7)
(RoUir; mi13s-3qi4p=t and uupplies)

SOXOLOV, V.A., insh.1 LEVINA, G.G., inab.1 Prininall uchastiyet MUINL-
_k.24-KOLOV, M.I.; SOSNOVSKATA, Z.N.
Increasing the durability of steel rolls for strip mills.
- - -- - --Stall----22 --no-,9021423 -- S- --1620- - - --- -- - - -- --- - (MIRA l5lU)---
1, Magnitogorskiy netanurgichaskiy kambinat.
(Rona (Iran mine)) (Steel-Heat treatment)

~-..-D.UxHrxy 1. Ye.
Some factors 1,Av-1rg an effect on thq 41hiifteas of rooks frozen
for many years, Mat, k ucho o marza zme lema kory no 9214-149
163 iM.IRA 18:1)

PuKWEV, G.V.,kaW.tekbn.nauk; F~DWVICHO D.I.; SHEYKINj I-V-;
. 1. LV1-.r=&VVp V.K.; 51WRO Tu.L.;FEL1DW,G.M.;
ED
FILIPPOVSKIY, S.M.;
[Thermal physice.of freezing and thawing soils] Teplofialka
promersaiusbehM i .p.rotaivaiusbchikh gruntov. Moskva# Nauka,
1964. 195 P. (MIRA 17:8)
1. Moscow. Institut meralotovederdya.

ZHFZTKOVA, T*N.; FEVDKAK, G.M.; DUKRIN, I.Ye.; SHVETSOV, P.F.
Formation or glacisl horlzons in epigenetic frozen strata.
Dokl. AN SSSR 156 no. 3058-560 164. (MIRA 170)
1. Chlon-lorreapondent AN SSSR (for Shvetmov).
I "

ACC NRs -AP6036-3-8-6
-SOURCE -CODE: UR/0210/66/000/007/009 -2/0007
AUTHOR: Yefimov, A. I.; Dukhin, 1. Ye.
ORG: none
TITLE: Maximum depth of occurrence of perennially frozen rock
SOURCE.- Geologiya i geofizika, no. 7, 1966, 92-97
TOPIC TAGS: geology, physical geology, geocryology, frozen rock, perennially
fro;i-:,. rock, perennially frozen rock depth, permafrost, depression /Tunkin
I ABSTRACT: The authors discuss the possibility of the occurrence of perennially
frozen rock to depths of 1200-1300 m in the Tunkin depression and elsewhere in
the v-.--,.-.;tv of Lake Baykal. Data obtained by other authors, principally A. P.
bulmasov, anc: the arguments presented by them for and against the occurrence of
perennially frozen rock at such great depths are analyzed, as is the reliability of
the gravimetric methods used in obtaining the data. A table is included which
presents information on instances of perennia-Uy frozen rock at maximum depths
(isothermal lower surface temperature 060 in Europe, Asia, and North America.
[Cc-rd 1/-2
UDC: 551. 52

ACC NRI AP6036306
The table in the original article shows name place, location, predominating rocks,
average armual air temperature, rock temperature at specific depths, maximuhil
depth of occurrence, and source of data. [W-79-67-4) ISPI
SUB MDE: OR/.qUB)I4 DATE: none/ORIG 024/0111 REF: ot"41
Card V2

FROIDTO N.M.; AVMIYUO M.1 DUKHIN, I.Ye.j LYURDWA., Ye.A.; Prinims'll
uchastiyet GOLIDBW, V.M.; kVP-tfSKIY, B.F.; SEDOVp N.V.;
YAZVIN, L.Se; ETASOV# IoK*; STARIKOVA, G.N.; KORTSENSHTEIN, V.N.,
red.
(Methodological instructions for studying thermal vatera in
boreholes.j Metodicheakie ukazaniia po izucheniiu termalln7kh
vod Y skvashinakh. Moskva,.Nedra, 1964. 139 p. (Hookov. Ves-
soiusnyi nauchno-ionledovateltakii inatitut gidrogeologii i
inshenernoi goologii. Trudy, no.17). (KIRA 19:1)
1. Veasoyninyy nauchno-iseledovatellskty institut gidrageologii
i inzhonernoy geologii, Moskva (for Frolov, Golldberg, lkvritakiyp
Sedov, Tazvin). 2. Institut vulkanologii Sibirskogo otdoloniya
AN SSSR (for Averlywv). 3. Inatitut merzlotovedeniya All SSSR
(for Dtikhin), 4, Institut fizikl. Zemli AN SSSR (for Lyubimova,
Kutasov, Starikova).

DUKEN, L.1h.,kamUdat moditelueldkh usuk.
Program of the obstetrics studr clao Felld I akush.no.1208-40 D
135. (MM 90)
1. XLywakcre medilslaskWe uchillshahs,
(OBSUMCS-Ofwl AND TWROO)

VJKHrff, LJh., kand.uedoauk; nummy, [Mdoklmov, O.IJ, kand.sed.nauk
--lumediate and late rotults for mother and child of the use of obstet-
rical forceps, PW., Anob. I cis. 20 to.lt49-52 158.
(MMA II: I)
1, Kiyevskir goradstor otdol sdraTookhranstiyao
(IOXVSI OBSTVIRIC)

MnIN. L.U. kand.mad.muk (11yor)
On the flftletb &=I-reraaz7 of the Second All-2mmsi&n CmWons of .
Nldsbe-rs and anea2loglats. 3F*Ild, i akushe 24 no.9:42-46 S 159.
(NM '12112)
(aymmmy-40musus)

MIM, LJ4.9 kandomed.vank (14w)
Devvlopmmi of uW"l (feldshors) saboals to the Ukralne. Tawh.
delo no.12rI329.1"I D 159. (MIRA 136)
(UnArM-4MlOM-ffWT AND TU(XM)

DURHINt 1,.'Xh.5 kand.med,nauk (Uyev)
Probleas in sepiprafs"ional mediq*1 education at foldsh*rst and
special con stes in th* prorovolutionary p4riod. Yrach.d*lo no.10i
.- - - - 135-138 0 IV. (MIU .13111)
- (KMCMW&,wMM -AMD -NA=P) --- -- ---- - -- -- - - ---- - - - -- ---- - ----

M Kiyev)
From the history of madiml trairting for subprofessiowl
personnel in the liev region In tha prerevolutlonary period.
Felld I, akush, 25 no. lOt46-49 0 160. (KM 13 110)
(Xlb'V-4CDlCIN&--STUDY M TEACHING)

11 4241-OM
.. D~WB f ou*Cmk (UPT)
I
Prob2sM Is A-0-slocAl macal training at Piroguy motbp
of physio Z . I Wmbo- 25 no.32136,42 D .160. (KEPA 3,302)
(MMOM--S=x M TEACHIM)
Ile

,I-
F
~,_PlT!LL.MlxjL kudomed.muk (Kipy) I
5M arALVsrlm7 of ths Arat All-ftseian Congress on the Rofors
of Obststri"l Zda"t1on, Folld, I akuh. 26 no.3:39-43 Mr 161,
(OBSTETRICS-CONGRESSES) (MIPA 1413)

:DUMNI L.Kh., kand.medanauk
History of the developmt of pharmaceutical education in tho
Ukraine. Part.le The prerevolutionary peroid. Farmatlev. SlAw.
16 no.303- 6 161. (KM IWO
~UVWff.-4nWMCT--STUDY AND TEACNING)

DUMUNj Llh.o kand.a*d.nauk (Xim)
100th anniversary of A.N.Rakbmawyla birth. Felfd. i akush, 26 no,St
.28-30 My 161. - - (MIM us 5) --
(RAMMOV , ALEMWR NIZOIAEVICH, 18(4-1961)

DUKHIN, L.Kh.,:k&nd.m*d.nauk (Kiyev)
N.M. Maksimovich4mbodik, the father of Russian. obstetrics; on'the
150th anniversary of his death. Felld.i akush. 27 no.7:34-37 JI 162.
-(K[RA 15:9)
(MANSIMOVICH-MODIX, NESTOR MAKSIHDVICH, 1744-1812)

DUKHIN, L.Kh., k&W.md. nauk MY")
~ ~ 1. .1 - ~ .. .
I . Fiftieth anniversar7 of the Thled All-FQssian Congreas of
Doldahers and Obstetriciaw. Felld. i akuh. 27 no.8:33-38
A9,62. (MIRA l6t8)
(PUBLIC REALTS-CONGRESSES)

DUKHINP L.Kh.,,~~.md.nsuk (Kiyov)
Professor G.F.Pissualdi aM his role in the organization of
maternity hospitals on collective farms. Felld. i &)mah. 20'
no.4:36-39 Ap'63. (MIRA 16:8)
(HOSPITALS, GINECOLOGIC AM OBSTETRIC)
(PISDUNj GRIGORII MORMICH, 18Q - 19Y?)

WIMIN, '.Kh.
Experience in trainina pbar=scy w;rkers in sjociali9t countrias.
Apt. delo 13 no.2s78-82 )b-Ap 44. (MIRA 1702)

(4XOqjjy1
a', Long Dlstances,~ by S. D. Dukhin and B. V, DerX!fiin,
Correspond ng Member ~f the Wcaaemy of Sciences USSR,
Institute of Phyvical Chemistry, Academy of Sciences USSR,
DoAlady Akademli Nauk SISSR. Vol 112, No 3, 1957, pp 407-410
The isothermal analysis of the problem of the motion of drops in a
~diffusion field led to establishment of the attraction -and repulsion
forces acting betveen fog drops, or betveen drops and an extended moist:.'.
surface, and exerting a significant influence on their motion relative
~to the medium. In first approximation the diffusion forces were cor-
pensated by the effect of Steephan,e flow, and the velocity of the drop
vith respect to the surface of phase transition was, equal to zero. How-
ever, it to ohow-n that under consideration of heat transfer occurring
-simultaneously with the diffusive process such compensation Is mostly
disturbed and diffusivit.1
wets
WIT-

DUKRIM. B.S., BuTKOVO H.V.
- ... -I -
The theory of the dynago adsorption layer of moving spherical
particless Part 2, Zhur. fis. Mixe 39 noo4t9l3-920 Ap 165.
(MIRA 1911)
1, Institut 6babehey i asorlanichaskol khImii AN UkrSSR.

DARTAGIN, D.Y.; DUIRIS, 3*8*1 911MISM, X.L.; UGAM, T.K.
UtilLsatlan of th* aord-usation method for the precipitation of the
ore dust* Borlbs a all. 2:22-31 055. (Km 9:5)
1. Chlas-korrospa4ask AkM&nii uuk SSSR (for Deryagin)o 2.
lutitut f isiabsetcy khlaii Ak~Aeaii nauk SSSI (for Daryagin) 3.
IrivorabskLy Nauchao-lealedovatellskiy gornoruduyyinatitut (for
DakhIn, Mhallson, U4pner)
-.- - (DUST-ADMAW

I
IMMUGINO BIT, k
"Oft
MISS of aeravol partiolem In a diffusion fl*24. DOLAN SSU 106
noesla6l'-~4 1 136. (MM 917)
leChlen-karrespondeat AN SM (for Darragin).2.1notitut fisicheskoy
Wail Akedivall awk Uft.
(Aerosols) (Diffusion)

al~Lmro ibi L-,- ~jv
7i

IDMINx ses.0 Cand Phys-Math Sol -- (diss) "Theory of the force of
diffus.ad long-range action of aerosols&" t!oscow, 1957, 16 pp (Lead
Sci U3SR. Institute of Physied Chamistry. Scientific Research
,Mining- Institute)q 100 copies (KL, 36-57,, 103)

Ott K 14 ljv~ SS,
AUTHORS: Deryagin, B, V. and Dukhin, S. Be 49-"/21
TITM On the influence of therzophoresis on the coagulation of
cloud drops; (0 vlLywdi termotorsta na koagulyatsiyu
oblaohnM kapol'),-
PERIODICALi *Izvestin kkademii Nauk. Seriya Geofizioheskaya"
(Bulletin of the -Ac Sc Geophysics Series), 1957, No&6t
Pv: 7~ 784 (U.S.S.R.)
ABSTRACT: The influence of thermophoresis forces is investigated
on the movement of aerosol particles in conjunction with
atemperature drop in the neighbourhood of mist drope.
The authors restrict themselves to the temperature field
and consequently to the thermophoresis "orces in the
neighbourhood of the drops, the dimensions of which do
not exceed several teas of 1i since with a decrease in the
drop dimensions, other conditions remaining equal, the
the=ophoresis force increases and the considered problem
ca-a be solved more simply if this simplification is valid.
The convective heat transfer and the convective diffusion
during the fall of particles of such dimensions can be
disregarded and the temperature field and the vapour
concentration in theirmeighbourhood. can be considered as
Card 1/2 being spherically symmetrical, The investigation in this

AUTHM WIMM -q-,q PA - 2110
TIM A Theory of Distant Inter&c.tion between Evaporating or Growing Drops
(Tsorija vzaimodoyetviya isparyayushchickhaya ili rastushchikh kapelIna
bol'shikh rastoyaniyakh).
PERIMICAL Diklady Akadamii Nauk SM. 1957, Vol 112, Nr J, pp 407-laO (U.S.S.R.)
Received 3/1957 ~ Reviewed IV1957
AB3TRACT The present papoir sho= that, when taking a heat transfer process do-
veloping-parall*1 to diffusion, the compensating efrect, or Stefan's flow
(Stsfanov, spelling not given) is cancelled in the general came. Therefore
the diffusion forces are able to exercise considerable influence on the
precipitation and on the coagulation of an aerosol.
This problem is solved here by using the simplifications airtady previous-
ly discussed by the authors (Dokl.Akad.Nauk, 95, 467, 1956)
-
case of the 1;w partial
The authors here deal only with the important
pressure of steam, for which reason it is possible to use the linearized
system of equations for the hydrodynamics of a mixture. All processes are
here considered to be quasi-ateady. The system of equations and boundary
in explicitly given and explained. Next, the solutions of these equations
which were found in consideration of boundary conditions are explicitly
given. An additional "polarization temperature" in then added to the
average temperature of the drop (this polarization temperaturs being iden-
t1lal with psychometric temperature). In a homogeneous exterior tempera-
tle- and diffusion field the drop is subjected to diffusion-thermal
polarization. The boundary condition obtained here, which takes diffusion-
Card 1/2

PA - 21-10
A Theory of.Dlistant Interaction between Evaporating or Growing Drops.
thermal polarization into account differs from the corresponding boundary
condition in the case of pure diffusion polarization by the amount ofa
coefficient. The total field of velocities found here is expreissed by a
superposition vj.(rrj,,e g) and Stake's velocity field vg(re, eg) which is
due to the exterior Stefan flow. Therefore also the entire diffusion force
is expressed by a corresponding sum. In the case of the liberation of heat
the drops are repulsed by the surface. However, in the case of the absorp-
tion of heat, the drops are attracted by the surface. In the cast of a
turbulent flow round a surface the diffusion force is localized in a thin
boundary layer. Surfaces with a temperature that-is below psychometric
temperature attract the drops, but surfaces with a temperature that is
above psychometric temperature repulse the drops. The diffusion forces
must render frosting of surfaces In undercooled clouds more difficult.
heat-liberating frozen drop must be a repulsion center for other drops.
(No illustrations)
ASSOCIATION Institute for Physical Chemistry of the Academy of Sciences of the USSR.
PRESEUM BY
SVEUIV'r 3. 1- 1957
AVAILABLE Library of Congress
Card 2/2

s-,
20-1.3V54
AUTHORs Dukh inj__ 3 0 3A- DeryaCkit Correponding Member of the
AcAftow or aclences 01 T.Uff
TITLEe A Theory of the Interaction Force Besween Drops at Rest at
Any Distance at Psychrometric Tempsiature i
(Toorip silovogo vlaimoderetviya pokoyashchikhsya Japell as
lyubom, raostoyanii pri paikhrometrichookoy temperature)
PERIODICAL# Doklady Akademii Sauk SSSR, 1957, Vol. 115, Nr 1, pp. 126 - 129
(USSR)
ABSTRACTs The present work treats this interaction for the stationary
and adiabatic course of the ph&@* transition with regard to
members small of first.and second order in relation to
and are the partial densities of
the vapour and the air. With using the similarity of the heat-
transfer- and diffusion processes we can easily show that in
the case of an adiabatic course of the phase transition, that
Is to say in the case of lacking heat sources and heat trans-
fer in drops, the tomperaturealong the surface of the drop does
not change and is equal to the peychrometric temperature. This
causes an Interesting characteristic of interaction and nakee
Card 1/2 easier Its investigation.

20-1-34/%
A*Theory of the Interaction Force Between Drops at Best at Any Distance at
Psychrometric Temperature
First the equations and boundary conditions for the field of
velocities anddiffusion current on the occasion of Use trans-
ition at the surfaces of spherical particles (drops I and 2
with the-radii R, and R are put down. The Stefan's linear
flow (Be 4~ 1) of the vilcous medium is, strange to say, a po-
tential flow which makes easier the calculation of diffusion
forces. After this a transformation of the equation for this
potenti:l 5) is discussed. A formula is deduced for the force
exercis d on drop 2 by drop 1. The interaction of the drops
In first approximation and with Re 0,~ I is at all distances
equal to zero. This coincides excellently with the result of
t1a direct calculation of the Interaction of drops at great
distances In first approximation as also this interaction is
equal to zeroa The authors find here an important analogy bet-
ween the diffusion interaction and the electrostatic inter-
action. In the and the formula for the interaction of drops
at great distances obtained from Coulomb's law is mentioned.
There is no figure but there are 4 Slavic references.
SUBMITTEDs January 299 1957
AVAILABM Library of Congress
Card 2/2

AUTHORSt Dukbin, S.S.; Deryagin, B.V. 69-20-3-11/24
r
TITLEt On a Method of Computing the Deposition of Disperse Particles
From a Flow on an Obstacle (r. metodike rascheta. osazhdeniya
disperanykh chastita is potoka na prepyatstviya)
PERIODICALt Kolloidrqy shurnal, 1958, vol XX, Nr 3, pp 326-328 (USSR)
ABSTRACT: In the physics of aerosols the problem of the ~epositionof
aerosols from a flow on an obstacle is very important. For
the calculation of the particles deposited in the time unit
on the obstacle, it is sufficient to determine the coeffi-
cient- of capture E equal to the relation of the cross se6tion
of the flow to the largest arose section of the obataole. If
the inertia of the aerosol or colloidal particle circum-
venting the obstacle is negligible and the field of external
forces is solenoidal, then the computed concentration of the
particles along their trajectory is constant. This theorem
permits, in a simple manner, the calculation of the deposition
speed of particles on obstacles, e.g. emerging bubbles or
descending balloons.
Card 112 There are 2 references, I Soviet and 1 English.

69-20-3-11/24
On a Method of Computing the Deposition of Disperse Particles From a Flow
on an Obstacle
ASSOCIATIONs Institut fixicheskoy khimii AN SSSR, Moskva (Institute of
Physical Chemistry,of the USSR Academy of Sciences)
SUBMITTED: January 10, 1958
Card 2/2
--o

Dtxmj, S. B.,,j PROMCIROVI P, a.; MUM) V
B rZM)qXA) G. I
"The adsorption of vapors by condensation nuclei and their influence on the formation
of vater aerosolso
mpart preeseted at the ?4.Awtb AII-~ftlm Cmrareme Colloidal CbmmlstZ7,
Tbilisi, Qqcrglan SWI 12-16 *y 19!5e (LAL tbzr -5e, 'Nubmn, A.B)

AUTHQRSs 'Dukhin, S.S.0 Deryagin, B.V. SOY/69-20-6-5/15
TITLE: The S0oondary (Diffusion) Electrical Double Layer (Vtorichnyy
(diffusionn") dvoynoy elaktrichoskiy sloy)
FERIODICALt Xolloidnyy 2hurnal, 1958, Vol 20, Mr 6, PP 705-707 (MR)
kBSTRAM On the mobile interface of two media, of which at least one
is an electrolyte, an ordinary (diffusion) electrical double
layer appears due to the interaction of diffusion and ionic
migration in an electric field. There to also a secondary
(diffusion) electrical double layer ariaing from the inter-
action between convective diffusion and ionic migration in
an electric field. The charge of the inner layer is due
to deviation from electrical neutrality. The charge of the
outer layer in located in the electrolyte layer aIjacent to
the interface and is equal in magnitude and opposite in
sign.
Card 1/2, There is 1 Soviet reference.

The Secondary (Diffusion) Electrical Double Layer SOV/69-2o-6-5/15
ASSOCIATION: K4vkazskiy Institut minerallnogo syrlya (Caucasian Institute
of Mineral Raw Materials)
SUBMITTEDt May 12, 1956
1. Electrical double layer-Theory
Card 212

5M
AUTHORS: Dukhin, S. S., Deryagin, 3. V,, SOV/.2o. - 121- 3-50/47
GorrospondIffg ember, Acadeiy of Sciences, USSR
TITLE; The Diffusional-Electrical Potential of a Falling Drop
With an Ldsorption Layer (D'iffuzionno elektricheakiy
potentsial padayushchey kapli * adsorbtaionnym aloyea)
PMODICAIT': Doklady Akadomil. aauk SSSR, 1958, Vol. 1211, ITr 3, Pp.-503 - 506
(USSR)
ABSTRACT: This paper jarries out a qualitative Investigation of the
adsorption of two types of ions from the solution of
an electrolyte an the movable surface of a drop. The
approximate conservation of the electroneutrality of the
double layer (dioynoy sloy) (which is constan%ly regenerated)
requires approxi=ately equal nunters of the positive and
negative charges which atandon the volume of the aolution.
If the diffusion coefficients of the positive and alt
the negative charges do not coincide, an electromagnetic
field will compensate the migration of the positive
and negative Iona to the surface. The phenomena of thi a
Card 1/3 -kind are analagous to-the-diffunian potentials. This paper

The Diffusional-Eloctrical Potential or a Failing BOV/2o-121-3-30/47
Drop With an Adsorption Layer
investigates the diffusianal-electrical effects *~;curring
during the falling of an eloctrolyte drop in a liquid
or gaseous medium (for example, in oil or air). For the
sake of simplicity, this medium is assumed to be
free from ions. In order to determine the electric potential
in the volume of the drop, it is necasaary to investigate
the continuity equ!ttions for the ton flows in the volume
cf the electrolyte. The normal component of the current
on the surfac-t of the drop is On first approximation)
equal to zero. It can be shown by analyses or by thermal
analogy %hat the problem under discussion has only a trivial
solution. Authors then investipTate the problem of the
electric field of a drcp for the up-ecial case of small
differencea of ion iQncentration. A, condition is then
given for the diffusion1within the drop, it determines
the order of magnitude of the ratio between convective
and diffusion flow. Finally, an expression is derived
for the distribution of th,e potential. The calculation
-values of electric field Gtrength do not occur in concrete
Card 213 experimantalk conditions since the electrocapillary Influence

The Diffusional-Blectrical Potential of a Falling SOV/2o-121-3-3o/47
Drop With an Adsorption Layei*'
of the surface was net taken Into account. There are
references, 3 of which are Soviet.
ASSOCIATION: Inatitut fiziaheakoy kbimii kkadamii nauk SSSR(Inistituto
of Physical Chemistry AS USSR)~
SUBMITTED: April 5# 1956
Card 3/3

sov'/180-59-1-16/29
AUTHORS: Deryagin, B.V. and Dukhin, S.S. (Moscow)
TITLE: Theory of the Movemen 0 Particles near a
Rising Bubble Applied to Flotation (Teoriya dvizheniya
minerallnykh chastits vblizi vsplyvayushchego puzyr'ka
v primenenii k flotatsil)
PERIODICAL: Izvestiya Akadomii nauk SSOR Otdeleniye tekhnichoskikh
nauk, Metallurgiya I toplivol 1959, Nr 1, pp 82-89 (UM)
ABSTRACT: The authors distinguish two stages in the attachment of a
mineral particle to a bubble in flotation. In the first
stage the particle approaches the bubble surface so
closely that forces promoting or hindering adhesion can
develop. This stage has not previously received attention,
and theauthors nov give a theoretical treatment, following
the extensive work of one of them (Deryagin) in this field.
They conclude that if "turbulization" (setting In
turbulent motion) of the pulp and deviation of the bubble
and mineral-grain shapes from spherical are ignored and
the treatment is restricted to grains small compared with
the bubble the problem becomes similar to the trapping of
Card 113 mist dropl:ts, They discuss the influence of the ratio of
the particle size to the minimum size at which contact due

sov/18o -59-1 16/29
Theory of the Movement of Mineral Particles near ; Rising Bubble
Applied to Flotation
solely to Inertial forces is still possible and of the
values of the Reynolds number and another d1M6U310UlQ33
group. The second stage, in which the particle becoues
attached to the bubble, they show to depend on the point
of contact and the contact velocity and give equations
and data for the calculations. The equations obtained
for the probability of contact are necessary for calcula-
ting the rate of flotation, Since the particle diameter
greatly affects this probability, the authors emphasize
that in considering the selectiveness of flotation the
degree of dispersion of particles must be allowed for;
Card 2/3 this may be done by using the equations given.

SOV/180-59-1-16/29
Theory of the Movement of Mineral Particles near a Rising Bubble
Appligd-to-Flotation-
The re are 8 references, 6 of vhich are Soviet and 2 are
mixed English-Soviet.
ASSOCIATIONt Kavkazskiy institut minerallnogo syrtya (Caucasian
Kineral Rav-Materials Institute) Kinisterstvo geologii
i okhrany nedr SSSR (Ministry oF Geology and eons'emtiou
cf Kinerall ResAmmes of the UM)
SUBMITTED: March 26, 1958
Card 3/3

80240
0 0 s/14l/59/002lo6/022/024
AUTHOR: Whia, S.S. 2032/9314
--103~ -
TITLZ; On & Possibility of Producing a Periodically
Non-honogonoous Dielectric
PERIODICALs Izvestiy vyssh'kh uchAykh savedeniy, Radiofizika,
1959, Vol 2: Mr 6, pp 1013 - 1014 (USSR)
ABSTRACT: Gersheuxon (Rof 1) has studied the effect of a standing
sonic way* on a liquid dielectric. The use of ultrasonic
_iWres- to -produce- periodic-st ructuros - is very convenient -
since the period of - the str,~,ictura can be varied within
mida limits. . -9 i4wjrj I jzj -tam -in, which it was used
ow
the dielectric constant* One would expect that the value
of the ultrasonic method would be &rA&ter if it were to
be. applied to suspension& or _,aarosols. In suspensions,
the, suspended particles tend to concentrate near the
nmx4-a or ininima. of the standing wave and the maximum
difference between the values of the dielectric constant
along the standing wave way approach a value equal to the
difference between the dielectric constant of the medium
Cardl/5 and of the particl4so The sonic pressure on a small

80240
3/141/59/002/o6/og2/024
On-& Possibility of Producing a Periolfaalifi4on-homogeneous
Di*lectriu
sphere in a standing sonic wave can be calculated from
King's formula (Ref 2), which is Sir" by Eq (1) in the
present paper, where k a 2WX 9 of is the mass of the
displaced medium, v and u are the amplitudes of the
velocities of the particle and the medium and f is of
the order of unity and depends on the density ratio. This
fornrula does not take Into account the visecaity of the
medium and conasquently cannot be used for flne particles
whose notion in the medium in characterised by a Reynolds
n=b*r emaller thou unitys In the latter case the effect
oZ the sonic wave an the particle is mainly viscous and
the drift of the particle is approximately de6cribed by
Eq (2), where a in the mass of the particle, I and IJ
are the viscosity and the kinematic viscosity of the medium,
r is the radius of the particle, t is the timeq
v = x is the velocity of the particle and u = Asia(kx)sin(ut)j
and in the velocity distribution in the standing waves
Since the amplitude of the vibrations A is much smaller
Card2/5

WUO
S/141/59/002/06/022/024
On a Possibility of Producing a Per-IM4110 Non-homogeneous
Dielectric
than the wavelength X , the x an the righthand side
of Iq (2) may be lookodi upon &A conAtant during
--period. --On -thim---&ppz%adx&*ion-the solution af Eq (2)
in given by Zq (3), where At, V and 0 are given
by the equations at the toot -of p 1013 and the top of
P 1014. The righthand side of Rq (2) way be looked
upon as a quasi-periodic force with a slightly varying
amplAtude which produces vibrations of the particle and a
sinultanAkOUS (an the, ayvrago) displacement during each
period. The average drift of the particle can be
obtained by averaging Iq (2) over the period. This gives
the trajectory of the partial* x., (t) which can be
obtained as a solution of Zqs (4) and (5). Unae the
Reynolds nimber in the present came in smaller than unity
it may be shown that the first and third terms in Sq (4)
are small and hence one obtains the simplified equation
given by Zq (6),, When the collection time Qp 3,
Card3/5 calculated from Rq (1)9 is of the order of 10 SOC

601W
S/141/59/002/o6/022/0211
On a Possibility of Prodacing a NriodIRIM151la-homoseneous
Di*lectric
Q a 3 cu. . r. = I IL, ultrasonic energy density
J1 = 100 cu). Collection time calculated from Eq (6)
is I see, This indicates the possibility of more
effective collection of fine particles at the turning
points of the standing wave* In order to prevent the
sedi.montation of the particles under the action of
Sravity the ultrasonic be" should be directed upwards
in -Ahich case the stationary distribution of particles
near a nodal plans which 14 not up after a time of the
order of () is determined by Zq (7). It follows that
for I = 3 cu and XL w 100 erg. cm-3 , particles with a
radius smaller than 1 1& lie within an interval
A x V I x JLO-2 of the nod*., An estimate carried out
using tinstein's formula for the root mean square
displacement due to thermal notion showed that when the
radius of the particles is greater than 0.1 ps the thermal
Card4/5

8M40
s/14l/59/002/o6/022/024
On a Possibility of Producing a Perio vaa2~f;lion-homogeneous
Dielectric
motion cannot prevent a collection of particles near
the nodal planes.
This in An abridged translation.
There are 5 references, 4 of which are Soviet and I is
English.
ASSOCIATIONi Institut ractiofisiki L elektroniki AN USSR
(Tnmti+u+m nf ItAdionhvales and Electronics of the - I Y
Ac.5c., Ukra
SUBMITTZD: July 9, 1959
Card 5/5

DUXHII. 8.8.1 MUOIN, B.T.
Bleetric field of a moving drop. P&rt It ?Mary of the electric
field of a drop containing an lonoomic owfaco-active substance,
Koll.shuro 21 no,IS37-" Ja-I '59s (NIM 1233)
I* lattitimt f istabookey Wali AN LIM, IsUrstorlys povorkhmstsykh
yavloaik, Iteskya, I Xhar'kevokly podagogichookly Inatitut In.
(Drops-Ilee trio properties) (Burf&ce-active agents)

05829
5(4) SOV/76-33-10-27/45
AUTHORSs Deryagin, B. V.,-Dukhiii, S. S., Lisichenko, Y. A.
TITLE: Kinetics of the Attachment of Mineral PRrticles to Bubbles
During Flotation. 1. The Electric Field of tho Moving Bubble
PERIODICkLe Zhurnal fiticheakoy khimii, 1959, Vol 53, Nr 10,
pp 2280 - 2287 (USSR)
ABSTRACTs The generation of an electric,field during the motion of a
liquid sepanting layer was,investi ated for the first time
by A. N. Frurkin and V. G-~Levich lRef 3) by means of a mer.
cury drop sinking in an elbetrolyte. It is shown hor* that
durifig the motion of bubbles in liquid media an electric field
is always generated which extends far beyond the ion sheath.
The prod4ction of such forces of a relatively large range
of action to further indicated in investigations mside by V. A.
Lisichenko Ot al (Ref 4). This article is intended to give
a theoretical explanation of this new effect in the field of
electrokinetic3 produced by stretching or compression of the
separating layers and at different diffwolon coefficients of the
ions. The authors calculated the electric field generated as
Card 1/2 a result of the afore-mentioned effect when a bubble rises