SCIENTIFIC ABSTRACT SITNIK, M.D. - SITNIKOV, I.G.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001550910013-6
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 24, 2000
• Sequence Number: 13
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

SITNIK. M.D.. kand.tekhn.nauk
Complex development of technical means, to provide for container
transportation for the future. Trudy MIN no.146:93-133 162.
(MIELA 15-12)
(Railroads-Equipment and supplies)
(Railroads--Freight)

SITNIK., M.D, k&nd.tekhn.nauk
The shipping and common carrier business is an important
connecting link of the unified transportation system. Zhel.
dor.transp. 44 no.803-37 Ag 162. (MA 15i8)
(Freight and freightage)

POVOROZHENKO, VladimJr Vasillyevich, prof.; SITNIX,, Mikhail
Danilo-~-ich; SYTSKO, Petr Aleks.
fCFV,, G.I., dote., red.; NEKHAY, V.T., red.;
KISLYAKGVA, M.N., tekhn. red.
(Problems of the improvement of carrying and forwarding
services in the U.S.S.R.1 Voprosy sovershenstvovaniia
transportno-ekspeditsionnogo obsluzhivaniia v SSSR; ma-
terialy. Pod red. V.V.Povorozhenko, G.I.Mikhailova.
Minsk, Izd-vo M-va vysshego, srednego spetsiallnogo i
professionallnogo obrazovaniia BSSR, 1963. 94 P.
(MIRA 17:1)
1. Nauchno-tekhnicheskoye setevoye soveshchaniye v BIIZhT,
Gomel', 1962. 2. Zaveduyushchiy sektcrom Instituta kom-
plekspykh transportnykh problem Gosplana SSSR (for Sitnik).

KARETNlKOV , A.D., doktor tekhn. nauk, red.; KOMM.'OV, A.V.,
doktor tekhn. nauk, red.; SITNI~j, M.D._,_:ka;ld. tekhn.
nauk,, red.; PREDE, V.Yu.p-IlizR., ed.
[Coordination of the work of the various types of transporta-
tion] Koordinatsiia raboty razlichrqkh vidov transporta. Mo-
skva, Izd-vo "Transport," 1964. 199 p. (MIRA 17:4)

SOV/117-58-12-26/36
AUTffORS: Gavrilov, S.M., and Sytnik, N.A., Engineers
TITLE: I.I. Chikarev, Fitter-Instrumentbuilder (Slesarl-instrumen-
tal'shchik I.I. Chikarev)
PERIODICAL: i'slashinostroitelf, 1958, Ur 12~ PP 37 - 38 (USSR)
ABSTRACT: Information is given on the work of Ivan Ivanovich Chikarev,
a Soviet machine builder who designed the following devices%
1) an improved design of a diamond polishing machine; 2) a
special machine for twisting 6rills; 3) a centermeter-co-
ordinator for determining the three-dimensional center in
parts; 4) a machine tool for the production of single-digit
stamps. At present Chikarev is occupied in designing an
automatic self-clamping holde.- and in developing a method
for the production of multi-digit hard-alloy stamps. There
are 2 pliotos ana 1 set of dia,zrams.
Card 1/1

RUNEV, Yuriy Kikhaylovich; SMIX. N.A., inzh.. -nid.; GORDRYNTA. L.P..
tekhn.red.
(Die stamping with the use of electromagnetic blocks] Shtempovka
13 primeneniam elaktromagnitnykh blokov. Moskya, Gos.neuchno-tekhn.
,zd-vo mashinostroit.lit-ry, 1960. 57 P. (KM 14:1)
(Shoot-metal work) (IlectromagnetO

TAUM. Boris Abramovich, prof., doktor takhn.nBuk; GORA. V.Te.. inzh..
retsenzent; SYTNIK N A~j inzh., red.; CHMOVA, Z.I., tekhn.red.
[Grab machanisms; theory,.design, and construction] Greifernys
mekhanimoy; teoriia, raschet i konstruktoli. Koskva, Gos.nauchno-
tokhn.izd-vo mehinostrolt.lit-ry. 1960. 326 p.
(MIRA 13:11)
(Cranes, derricks, etc) (Ifteavating machinery)

KAKSIMOT, M.T., kand.tekhn.nauk; BORDYUKOV, A.P.. inzh., retsenzent;
SYTHIK, N.A., inzh. red.; UTAROTA, A.F.. tekhn. red.
[Boiler units with a large evaporative capacity lesign and
construction] Kotellnye agregaty bol'Bhoi'paroproizvoditallno-
sti; raschat i konstraktirovents. 14oskva. Gos.nauchno-tekhn.
Izd-vo mashinostrolt. lit-ry,,1961. 43o P. (miRA 14:5)
(Boilers) ...
. .'r

RADYUCHENKO, YuriiSergeyevich; BRYUKHANOV) A.N.., kand. tekhn. nauk,,
retsenzent; SYTNIK,, N.A., Izzh~,,, red.; alIRNOVA, G.V.p tekbu.
red.
[Rotary forging; shaping parts on rotary-and radial-forming
machines] Rotatoionnaia kovka; obrabotka detalei na rotatsiommo-
i radial 'no-obahimriykh mashinakh. Poskva, Mashgizq 1962. 185 P.
.(Forging) (MIRA 15:3)

GERASIMOV, N.I., inzh.;_qITNIK__A~.,A., Plesart-naladchik univ-ersalino-sbornykh
prisposobleniy
Use of universal assembling devices in ship repair. Biul. tekh.-ekon.
inform. Tekh. upr. Min. aw. flota 7 no.3:57-76 162. (JURA 16:5)
1. Kanonerskiy sudorezontnyy zavod (for Gerasimov).
(Ships-Maintenance and repair)

BOIWAZKMI S.R.. inshener (g.lovocharkaosk); SITNIK, N.1h., inshener.(g.lovo-
chark"sk); SMOMISHCHIM, V.A., lnsho"n"e'r'--'(~'g'.~1'4iiochorksask).
Single-phase IndustrW freqaency electric locamotives.Zhel.dor.
transp. 37 no.1l:S-14 1 055. (KMA 9:2)
(Ilectric locomotives)

8(0)
SOV/1 12-59 -4-6955
Translaticr. from: Refera"wnyy zhu:rnzi. Elek' ek i 1959, Nr 4, p ?6 (USSR)
AUTHOR: Sitnik, N. Kh.
TITLE: Mathematica! Simulation of Commutatoriess AC Machinery
PERIODICAL: lzv. V-Yssh. uch-ebn. zaveden-;,f. Elektrcmekhanika, 1958, Nr 1,
pp 35-49
ABSTRACT: The complexity of piv
- raica! simuip-tion switches one's attention to a
mathematical simulation of electrical rnachinery. To simulate a -physical
phenomenon mathematically, an analytical connection between the quantities
determining the phenomenon is to be found. Analytical relationships are
expressed as a block diagram of a mather-riatical model which serves as a
structural scheme of the latter. The black diagram components represented
by computers carry out certada mathematical operations. The -mathematical
simulation of AC machinery is complicatea by the fact that both self-inductance
and mutual lmductan-ce rotary-machiae windings depend on. time; as a result,
Card 1/2

SOVI I 12.-_59 -4-6955
Mathematical Simulation cof Commuta-zorless AC MacIdnery
variable coefficients appea_r in the diffe-rential equations that describe the
electromagnetic phenomena in the machine. Two methods of constructing
mathematical model are possible; (1) e. dircct use of differential equations;
here, the variable coefficients require introduction of special computing
r
com-ponents; (2) transformation of the dliferential equations of z-11 -oha-ge
windings to the sarne machine axes (e. g. , stMor axes) which permits clearing
the eqt1ations of variable caefficie-_-ts; the blocks of components of all quartitaes
alcng the axes selected are intrcduced in the niodel. Both metbodl are
cons4-dered. for the case of a capac.;A or -type motor which represents a simple
asymmetrical machine. A compariso.~, of -the block diagrams revezLIG the
expedie:_-~cy cf the second six-n-ulation method; it h-as P_ lower error.
P. N. P.
Card 2/2

SITNIK, Nikolay Kharitonovich, inzh.
_*~~ ~tod f~�r=signing asynchronous *.phase splittere and their para-
meters. Izv.vys. ucheb. zav.; elektromekh. 1 n0-3:75-89 '58.
(xm iltO
1. Novocherkasekly elektrovozostroitellnyy zavod.
(Electric machinery-Alternating current)

110-2-7/22
AUTHORS: Zolotarev, P.A. (Digineer), Kozorezov, M.A. (Engineor) &
Sitnik, N.111, (aigineer)
TfTLE: The drive of auxiliary equipment in a.c. electric locomotives.
(Privod vspomogatelluykh meldianizmov alektrovozov peremennogo toka.)
PERIODICAL: Vestnik Elektropromyshleraiosti, 1958, No.2, pp.24-28. (USSR)
ABSTRACT: With the increasing development of 30 c/s locomotives, more attention
must be paid to the drive of auxiliaries. The main auxiliaries
are compressors, fans, pumps and low voltutge d.c. generators, all
being constant-speed mud-torque machines except the compressor. In
addition to the usual requirements, such as reliability and simplicity
of servicing, they must withstand ambient temperatures ranging between
+40 and -500C. and supply-voltage variations of +10 and -30%. The
starting torque required of the driving motor of a compressor type
~-500 and the ambient temperature are related in Fig.1, based on the
experimental data by Engineer G.G. Rekus of the Moscow Higher Technical
College. Auxiliary equipment is supplied from a special single-phase
winding on the locomotive power transformer. The first Soviet main-
line a.c. 50 c/s locomotive type OP-22, constructed in 1938, used
3-phase induction motors supplied by a synchronous phase-splitter for
auxiliary drive. In 1954 the Novocherkassk Electric Locomotive Works
produced 50 c/9 locomotives type 110 in which the auxiliaries are
Card 1/3 driven by capacitor-start induction motors. Abroad, extensive use is

The drive of auxiliary equipment in a.c. electric locomotives. llo-2-7,122
made of induction motors. The use of capacitor-start induction
motors is then further considered,, The motors may be ordinary
3-phase machines in which the main winding consists of two phases
of the three-phase winding connected in -teries, the third phase
forming the capacitor winding. Various special features are then
discussed. The torque curve of the pump motor used in locomotive
typo 110 is given in Fig~'_'. A trough in tho curve, tit one-fifth
synchronous speed, makes the motor un3uitable for practical purposes.
The system has a number of other disadvantages in rolling stock,
although it (toes give a high power-factoi . The system using three-
phase induction motors supplied by a phase-splitter is then discussed.
The latter is described; its circuit is given in Fig.3 and vector
diagram in Fig.4. Graphs of the mechanical characteristics of
induction-motor type AC81-6 with a number of variants of supply are
given in Fig.5. The influence of the leakage reactance of the phase-
splitter windings on the starting characteristics of the motor will
be noticed. In further discussing characteristics of phase-splitters
it is claimed that motors so supplied have better starting
characteristics than capacitor motors, and do not involve
disconnection of starting capacitances. Operating experience shows
that failure to disconnect burns out the motor winding. In capacitor
motor schemes the cost of auxiliary drives is about dotible that
Card 2/3 obtaining when a phase-splitter is used. The latter is, therefore,

The drive of auxiliary equipment in a.c. electric locomotives. 110-2-7/22
recommended, particularly for rectifier locomotives in which the
power-factor can be improved by installing synchronous compensators
on the locomotive and combining the phase-splitter and compensator
in one machine. A series d.c. motor sup.Plied through a rectifier
or alternatively a single-phase commutator motor is advised for
the compressor drive. There are 5 figures, 3 literature references
(2 Russian).
SUBMITTED: July, 1, 1957
ASSOCIATION: The Wovocherkassk Electric Locomotive WoAs (Novocherkasskiy
elektrovolostroiteltnyy zavod)
AVAILABLE- Library of Congress.
Card 3/3

AUTHOR: Sitnik, N.Kh., Engineer SOV/144-58-8-4/18
TITLE: Mathematical Analogues of Unsymmetrical Asynchronous
Machines (Matematicheskoye modelirovaniye nes-immetrichnvkh
asinkhronnykh mashin)
PERIODICAL: Izvestiya Vyssh2ti Uchebnykh Zavedeniy, Blektromekhanika,
igr-8, Nir 8, pp 28 - 44 (USSR)
ABSTRACT: This is the first of two articles in which only stationary
machines are considered. A single-phase asynchronous
induction motor with an unsymmetrically wound stator is
-~,on3irlered (unsymmetrical st.-a-r system) in the first
section. The starting conditions in such motors are
considered with the circuits used.
The next se--~ticn deals with the principles that must be
used in lesigning electronic analogues, in particular, the
structural s~~,hemes that are most suitable. The need to
avoid exc~essive use of integrators, which drift, is
stressed. The necessary conditions to be ensured in
--cupling the analogues for *the various windings together
are stressed. The need to avoid inexact cancelling of
positive and negative feedbacks (which can lead to
Cardl/2

SOV/144-58-8-4/18
1-ilatilematical Anaial-a;,ues of Unsymmetrical Asynchronous Eachines
oscillation) is pointed out. The proper scales that use
the facilities o! the computer best are then considered
(Eqs 3, 4), The third section deals with the equations
be used in operating the analogues; the fourth with a
numerical example; it is shown that the error in finding
the current by calculation is some %, whiie the starting
torque may be in error by 1011o. The transients in the
starting torque and the optimum parameters for the staxting
circuits are presented in Figures 10-14.
There are 14 fiEures and 5 Soviet references.
ASSOCIATION: 1,1ovocherkasskiy elektrovozostroitellnyy zavod
~Novocherkassk Electric Locomotive ',Works)
SUBMITTED: JulY 30, 1958
card 2/2

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ll-,O conicr, ("I", 313-5~1 105)

AUTHOR: Sitnik N h-h , Engineer SOV/11+4-59-8-11+/1,4
i=~~
TITLE: The Manufacture and Application of Silicon Power
Rectifiers
PERIODICAL: Izvestiya vysshikh uchebnykh zavedeniy,
Elektromek-hanikag 1959, Nr 8, pp 112-111+ (USSR)
ABSTRACT: This article is a report by the author on his visit to
the three firms of Siemens-Schuckert, Siemens & Halske
and Krupp in the Federal German Republic and West
Berlin in May, 1959. It is a general description of
Siemens practice in the manufacture and use oif-' silicon
Power rectifiers.
There are no figuresq tables or literature references.
ASSOCIATION: Novocherkasskiy elektro-,fozostroitellnyy zavod
(Novocherkassk Electric Locomotive Works)
Card 1/1

KUROCMU, A. L. P kand. tekhn. nauk; _ � -
kand.tekhn.nauk;
POSIROBKO, A.A., iush. (Poskrobko)
Prospective a.c.locomotive. Zhel.dor.tranap. 42 n0-7:
13-20 Jl 160. (NM 13:7)
(Blectric locomotives)

-S-IrITIr, '" Tb
-,. . eLaotric locomotive produced b3r the firm *EngliBb Electric."
Izv. vys. ucheb. sav.; slektromekh. 4 no,10:120-124 161.
(MM lip.11)
(Great Britain-Electric locomotives)

SITNIK, NJh., kand,,tekhr,nauk
Electric locomotives with semiconductor rectifiers, Vest,
elektroprom, 32 no,,5t7-13 MY 161. (MIRA 15-5)
(Electric locomotives)

WVCHENKO, A.I.; SITNIK X.M.
Ways of creating main-line electric locomotives on tho two
of dimensional series and standardization. Sbor. nauch. trud.
EINII 2:72-93 162. (MIRA 16:8)
(Electric locomotives--Design and construction)

ZOLOTAREV, P,A., inzh. (Novocherkasak); POSYROBKO~ A~~-, inzh.
(Novocherkassk)l SITNIK, N.M., kand,teklin.naiLk (Novocherk-assk)
Selecting the method of voltage regu3ation on ' a,c.electric
locomotives. Zhel.dor.transp. 44 no-1:38-43 Ja 162.
(JIMA 14:.12)
(Electric locomoti-na)
(Voltage regulators)

SITNIK, NT.Kh., kand. tekhn, nauk
Autonornous stabilized inverter using p-n-p-rn devices. Elektro-
n
teklinika 35 no.iO:22-23 0 164.
("111RA 17: 11)
i
-f

L 04436-67 EWTW
ACC NR: P 014 94 SOURCE CODE: UR 0105
1
AUTHOR: (Candidate of technical sciences); Bogryy, V. S.(~~Meer)
;ORG: Mordovian Scientific Research Electrotechnical Inst! ute (Mordovoldy nauchno-
isaledovatel'skiy elektrotekhnicheskiy institut) -3 t?'
ITITLE: Switching a
mad control devices designed with symmetrical thyristors .3
4-
1SOURCE: Elektrichestvo, no. 5, 1966, 55-57
TOPIC TAGS: thyristor, semiconductor device
STRACT: New
"symmetrical" power thyristors have been developed in the SSSR;
such a thyristor can be turned on at any supply-
voltage polarity; it is turned off like a
conventional thyristor. A symmetrical-
thyristor 3witching circuit (see figure) using a
VKDUS-100 thyristor requires, for its control,
only 400 ma at 6 v, i.e. , the control -electrode
dissipated power is only 2. 5 w. An emitter-
feedback transistor is used to d-c control the
17~0 symmetrical-thyristor circuit. Nonlinear
distortion inserted by the thyristor switch is
T it\ negligible; turn-on and turn-off angles are with-
Card 12 UDC: 621.382.233
To protection and
-switching circuit

04436-6?
ACC NRs AP601469-1
jin Za and 6', respectively. A 3-phase circuit swAching 29 kw caused a lose of only
240 w (or 0. 8%); the turn-off -state thyristor current was I ma. Also, a circuit for
the a-c control of a rectifier (described by one of the authors elsewhere) is discusal
This circuit is particularly suitable for the cases when at > 600 ; it directs the ener
toward the load at all times (conventional rectifiers send energy back to the supply
within certain portions of the a-c period) and, hen ce, has lower ripple and
~source
higher efficiency. Orig. art. has: 5 figures.
SUB CODE: 09 SUBM DATE: ZOApr65 / ORIG REF. M / OTH REF: 001
aw.-n
Co,d-2/?-

ACC NR: AP7009073 SOURCE CODE: uii/o4l3/0'7,1000/GC)3/00li9/0049
~INVEENTOR: Sakovich, A. A.; Sitnik, N. Kh.; Abramovich, M. I.; Antonov, B. M.;
;Bogryy, V. S.
IORG: None
iTITLE: A reversible static converter. Class 21, No. 190974 (announced by the All-
~Union Electrical Engineering Institute im. V. I. Lenin (Vsesoyuznyy elektrotekhni-
cheskiy institut)]
SOURCE: Izobreteniye, promyshlennyye obraztsy, tovarnyye znaki, no. 3, 1967, 49
TOPIC TAGS: nonrotaxy electric power converter, voltage regulator, phase shifter
ABSTRACT: This Author's Certificate introduces: 1. A reversible static converter
with controllable cutput voltage. The unit contains a phase shifter and controlled
~
rectifier. The output voltage control range is e-Tanded and operational reliability
is improved by making the device in the form of individual unified cells connected to
~operate in parallel depending on the load. 2. A modification of this converter in
which each cell is made in the form of a single-phase commutator inverter connected to'
ithe input of the corresponding phase shifter. 3. A modification of this converter in
1which the single-phase commutator inverter is made up of silicon-controlled rectifiers
!connected in a bridge circuit with two series-connected rectifiers in each arm of the
Card 1/2 um; 621.314-58

:-;kc Ct4C.-kp- l6b Vob
ibridge.
1-phase shifters; 2-contro lled rectifier; 3-unified cells;
4-inverter; 5--controlled rectifiers in the inverter
BUB'CODE: Fal SUBM DATE: 26Feb64
ard 2/2

USSR/ tivated Pl~As - Fruits and Berries. M-5
tj
Abs Jour : Ref Zhur - Biol., 110 3; 1958o 100
Author : S;tnik, N.P.
Ins'.
Title The Peach in Northern Moldavia.
Orig Pub Sadovodstvo, vinogradarstvo, i vimdeliye Moldavii,
1956, no 6, 23-25
Abstract In 1953 in the village of Tsaull, Tyrnovskiy rayon, a
variety test plot was set up out cf 38 varieties of
peach on the following rootstocks: -Dlum (Prunus diva-
ricata) I almnd and peach. All varieties took root at
the rate of 90.4. The wood did riot get frostbitten
althougla -the temperatures dropped to -200- -260 (winter
1953/1954). In 1954 some isolated fruits were noticed.,
and in 1955 al st all the trees gave fruit. The highest
yields were given by Otechestvennyi 2 (89 centners),
Card 1/2

iVAVIIIN, kand. tuk fin. nauk; GAYF)e)fi, B.I., Inzh.; MIRONOV, I.M., inzh.;
F inzh.
1-1 -.11'. r,f-. P.J4
Use of synthetic materials in high-voltage Insulators. Energ. i
elektrotekh. prom. no.2.-37-38 Ap-Je 165. NIRA 18:8)

SITNIK., S.Kh. [Sytnyk, S.Kh.]
Protection of electric motors equipp3d with a maune-tic starter. Kharch. .
prom. no-4:75 O-D 163. (WRA 17: 1) , i"
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CHERNYAVSKIY, N.D., kand.tekhn.nauk; SYTNI-K.Jk., inzh.
Panels made of the new IISK" material to be used in buildizk-,
prefabricated houses. Stroi.prom. 17 no.10:17-18 0 149.
(MIRA 13:2)
(Building mterials) (Buildings. Prefabricated)

S/194/62/000/005/103/157
D230/D308
.~'..UTH'CRS: Sta.-ovoytova, R.P. , an~_Sy_t_4~~_
TITLE: kiatural oscillations in a metval trough with a
laminated filling
I &D I C,'t L~~efcrrativnyy zhurnal. Avtomatika i radioelektronika?
no. 5, 1962, 21 abstract 5zh151 (Tr. Sibirsk. fiz*.-
tekhn. in-ta pri Tomskom un-te, 1960, no. 39, 66-71)
T7"-','T: 'The authors; consider oscillations in a reAangular metal
zrough of infinite dimensions with two dielectric slabs placed pa-
raliel to its bottom. The characteristic equatian for determining
the 1.-i_-ve-number of the surface waves is obtained. It is shown, that
in the case of longitudinal magnetic waves, trio types of oscilla-
tions can take place, owing to the presence of the two slabs. For
sufficiently large distances between the slabs (1;,~- 0.5 ),) the
wave-numbers of these waves can be calculated using simpler formu-
!as- LAbstractor's note: Complete translation].
Ceird 1/1

KOROVIN, F.T.; BELOKHVC)STOV, S.D.; SUVOROV, V.S.; YURLiEMKO, M.M.; SYTNIK,_V.A.
Poom disinfection by means of chemical sublinmLtion of formaldehyde
and chlorine. Voen.-med. zhur. no.6:49-51 Je '61. (141BA 14:8)
(DISIWECTIO4 AND DISRIFECTANT) (FOEMMEHIDE)
(CHLOIZIII-E)

IMIOSHKOVSKIY, N.F., inzh.; SYTNIK, V.A., in-zh,.; YAREMENKO, D.S., inzh.
On the road of mechanization and automation of industrial pro-
cesses. Stroi. mat. 7 no-10:30-33 0 '61. (YJRA 14:10)
j. Kiyevskiy kombinat asbestotsementnykh izdeliy.
(Kiev--Building materials industz7f--Technolopical innovations)

GMWi, G.I., inzh., KOZLOV, V.Sb., Inzh.; SITNIK, V.I., innh.
Open standard crane trestles. Prom.fitrol- 38 no.1:25-27
16o. (141RA 13:5)
(Granes, derricksp etc.)
(Trestlea)

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USSR/Chemistry Photosensitisers San 52
"Nerocyanine Dyestuffs - Deriv&tives of Rhodanine.
II. Properties of Dimethinemerocyanines With Dif-
ferent Heterocyclic Nitrogen -Containing. Rad ic ",0 it
M. V. Deychmeyster, Z. P. Sytn:Lk, E. B. Lifshits,
All-Union Sci Res Cine-Matographic~ Inst
"Zbur CYbshch Khim" Vol XXII, No 1, pp 166-175
Synthesized following derivs of rhodanine and 3-
ethylrhodanine- 28 dimethinemerocyanines differ-
ing by nature of heterocyclic N-contg radicals and
2 monomethineoxanine dyestuffs. Studied light'
absorption. Found that hypsochromic displacement
207T31
TUISSR/Chemistry - Photos ens it izers (Contd) Jan 52
depends on nature of heterocyclic N-contg radicals.
All merocyanines synthesized are sensitizers for
Ag halide emulsions, most effective being dyestuffs
'with thiazole, thiazoline, and pyridine-(2) groupgj.

SYTNTKI Z.P.
USSR/Chemistry - Photographic Senaltirers Apr 52
"Merocyanine Dyestuffs (Derivatives of Rhodanine). III
Dimethinemerocyaninea-Derivatives of 3-Aminorhodanine
and 3-Diacetylaminorhodanines," Z. P. Sytnik, S. V.
Natanson, M. V. Deychmeyster L. D. Zhilina, All-Union
Sci Res Cine-Photo Inst
Zhur Obshch Khim, Vol XXII, No 4, pp 705-711
Prepd representatives of a new group of dimethine-
merocyanines and tested their optical and photo-
graphic properties.
224T53

Aferecyadise Dyes of R---- D"11"ItIM.AV.- StingtOM dPMd*dS' of
d Q6tensir Softs AL
1. Y-yraq M V. Mcw4wm and L-P-1 M&A. 4 Cieff,
A952, 22, 1225-1-234 , Lhem. AM., iY.Nj, 47, 1511-1512.-Dyes which arc
'derivatives of 2:4-thiazolidinediahe arc formed whed thi quaternary sails of
dimethinenterocyardries having the 2-methylmercapto4-thlazelidone residue
tire decomposed In water or alcohol. No rupture of the ciirbonyl-carrying ring
takes place, The action of beat em a dirricthintmeragat;int: with the 2:4-
thiazolidinediant residue in alcoholic caustic potash does cause nsptuie of the
carbortyl-curying ring with a loss of cubon dioYAde mid the formation of
in ot-mercaptearaldc The tatter Is essify oxidized by (M passage of air to the
disulphide, For examptc,
t1dazolidine-2,thione4-cme was quatemiscd with ditaithyl rulphate and the salt
heated in 50 per cent ethyl aWW In carbott diaxide-fite air for two hours
until free from carbon dioxide. a yield of 87.6 per cent of 3-cthy1-5-(3-ethyI-2-
b.-rizothlazolin iden"th ene)-2:4-thfamUdinedlow wis obtained. When
the latter is rdluxed for Men minutes fit athartolie caustic potash the products
include ethylamirm and potassium carbonate. The Mige of air through
the mother liquor gave '66 per cent of
A.M.
-7~

syrly,"