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Общее количество найденных документов : 28
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 1-20    21-28 
1.
Инвентарный номер: нет.
   
   A 89


   
    Asymmetric Biginelli Reaction Catalyzed by Silicon, Titanium and Aluminum Oxides [Electronic resource] / O. V. Fedorova, Yu. A. Titova, A. Yu. Vigorov, M. S. Toropova, O. A. Alisienok, A. Murashkevich, V. P. Krasnov, G. L. Rusinov, V. N. Charushin // Catalysis Letters. - 2016. - Vol.146, № 2. - С. 493-498
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
BIGINELLI REACTION -- PHENYLETHYLAMINE -- ALUMINUM OXIDES
Аннотация: The asym. Biginelli reaction was investigated in the presence of N-​[(2S,​4R)​-​4-​hydroxyprolyl]​-​(S)​-​1-​phenylethylamine as chiral inducer and silicon, titanium or aluminum oxides (individual and mixed, bulk and nanosized) as heterogeneous catalysts. The synthesis of Et (4R)​-​6-​methyl-​2-​oxo-​4-​phenyl-​1,​2,​3,​4-​tetrahydropyrimidine-​5-​carboxylate from benzaldehyde, urea and Et acetoacetate has been described. It has been shown that all studied oxides improve chemo- and stereoselectivity of the Biginelli reaction.

\\\\expert2\\nbo\\Catalysis Letters\\2016, v.146, p.493.pdf
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2.
Инвентарный номер: нет.
   


   
    Bioactive silicon-iron-containing glycerohydrogel synthesized by the sol-gel method in the presence of chitosan / T. G. Khonina, D. S. Tishin, L. P. Larionov [et al.] // Russian chemical bulletin. - 2022. - Vol. 71, № 11. - P2342-2351
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A novel biologically active nanocomposite glycerohydrogel based on two biocompatible precursors, silicon and iron glycerolates, was synthesized by the sol—gel method in the presence of chitosan (Ch). The composition and structural features of the gel were characterized by advanced analytical methods including transmission electron microscopy, X-ray diffraction, and atomic emission spectroscopy. It was shown that iron(iii) monoglycerolate undergoes partial hydrolysis under the gelation conditions and exists as a separate nanoscale phase along with the hydrolysis products in cells of the 3D Si-containing polymeric gel network. This network is formed as a result of incomplete hydrolysis of silicon glycerolates in excess glycerol followed by homo- and heterofunctional condensation of silanol groups with the formation of Si-O-Si units containing residual glyceroxy groups at the silicon atom. Chitosan forms numerous intermolecular bonds with the 3D gel network, accelerates the process of gelation, makes the gel morphostructure more ordered, and increases the stability of the gel. The Si-Fe-Ch-containing glycerohydrogel is nontoxic and possesses hemostatic and wound-healing activity, being a promising topical medication for medical and veterinary practice.

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3.
Инвентарный номер: нет.
   


   
    Biocompatible silica-polyethylene glycol-based composites for immobilization of microbial cells by sol-gel synthesis / D. G. Lavrova, A. N. Zvonarev, V. A. Alferov [et al.] // Polymers. - 2023. - Т. 15, № 2. - P458
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ORMOSIL COMPOSITES -- BIOFILTER -- BIOCATALYSTS
Аннотация: Biocatalysts based on the methylotrophic yeast Ogataea polymorpha VKM Y-2559 immobilized in polymer-based nanocomposites for the treatment of methanol-containing wastewater were developed. The organosilica composites with different matrix-to-filler ratios derived from TEOS/MTES in the presence of PEG (SPEG-composite) and from silicon-polyethylene glycol (STPEG-composite) differ in the structure of the silicate phase and its distribution in the composite matrix. Methods of fluorescent and scanning microscopy first confirmed the formation of an organosilica shell around living yeast cells during sol-gel bio-STPEG-composite synthesis. Biosensors based on the yeast cells immobilized in STPEG- and SPEG-composites are characterized by effective operation: the coefficient of sensitivity is 0.85 ± 0.07 mgO2 × min−1 × mmol−1 and 0.87 ± 0.05 mgO2 × min−1 × mmol−1, and the long-term stability is 10 and 15 days, respectively. The encapsulated microbial cells are protected from UV radiation and the toxic action of heavy metal ions. Biofilters based on the developed biocatalysts are characterized by high effectiveness in the utilization of methanol-rich wastewater—their oxidative power reached 900 gO2/(m3 × cycle), and their purification degree was up to 60%.

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4.
Инвентарный номер: нет.
   
   B 83


    Boyakovskaya, T. G.
    Siliconorganic glicerohydrogels as a new base for creation of medical and curative-cosmetic oinments [Text] / T. G. Boyakovskaya, L. P. Larionov, T. G. Khonina // China-Russia. International Confernce on Pharmacology, Harbin, July 1-4 2005. - Harbin, China, 2005. - P50-51
ББК 61
Рубрики: ЗДРАВООХРАНЕНИЕ. МЕДИЦИНСКИЕ НАУКИ

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5.
Инвентарный номер: нет.
   
   C 74


   
    Composition, structure, and properties of pharmacologically active silicon dimethylglycerolates [Electronic resource] / T. G. Khonina, E. Yu. Larchenko, E. V. Shadrina, I. N. Ganebnuikh, A. A. Boyko, E. G. Matochkina, M. I. Kodess, O. N. Chupakhin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2010. - Vol. 59, № 12. - P2230-2235. - Bibliogr. : p. 2235 (13 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 1H and 29Si NMR spectroscopy showed that the product of the reaction of dimethyldiethoxysilane with glycerol in the molar ratio 1: 2 is an equilibrium mixture of dimethyldiglyceroxysilane and low-molecular-weight condensation products. The change of viscosity of silicon dimethylglycerolates, synthesized using different excesses of glycerol, versus time was studied by viscosimetry. Composition of products of hydrolysis and condensation of silicon dimethylglycerolates is determined by their concentration in the starting aqueous solutions

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2010, 59 (12), 2230-2235.pdf
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6.
Инвентарный номер: нет.
   
   E 97


   
    Extraction of vanadium (IV) with DI-2-ethylhexylphosphoric acid [Электронный ресурс] / L. D. Kurbatova, P. A. Slepukhin, D. I. Kurbatov, E. V. Zabolotskaya // Phosphorus, Sulfur, and Silicon and the Related Elements. - 2012. - Vol.187, №9. - P1032-1037
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ELECTRONIC SPECTRA -- ESR SPECTROSCOPY -- VANADIUM
Аннотация: It was established with the use of electron and ESR spectroscopic methods that in the presence of sodium sulfate, the extraction of vanadium (IV) with di-2-ethylhexylphosphoric acid takes place by a cation-exchange mechanism giving rise to two complex compounds of vanadium (IV) oxocation with sulfuric and di-2-ethylhexylphosphoric acid anions. The vanadium (IV) oxocation sulfate complex extracted in the solid state was examined with X-ray structural analysis. It was shown that the vanadium (IV) oxocation sulfate complex trihydrate crystallizes in the centrosymmetrical space group to form dimers with bridging sulfate groups

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7.
Инвентарный номер: нет.
   
   F 33


   
    Features of silicon- and titanium-polyethylene glycol precursors in sol-gel synthesis of new hydrogels [Electronic resource] / T. G. Khonina, A. P. Safronov, M. V. Ivanenko, E. V. Shadrina, O. N. Chupakhin // Journal of Materials Chemistry B. - 2015. - Vol. 3, № 27. - С. 5490-5500. - Bibliogr. : p. 5499-5500 (38 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
MODIFIED SILANES -- MINERALIZATION -- MONOLITHS
Аннотация: The formation of organic/inorganic hydrogels based on silicon and titanium polyethylene glycolates, new biocompatible water-soluble precursors in sol-gel processing, was investigated. The influence of different factors on the gelation process, such as excess of PEG, water molar content, pH of medium, electrolyte additives, was investigated in comparison with silicon-and titanium-glycerol precursors. The specific features of gelation for each type of precursor were revealed. It has been determined that titanium polyethylene glycolates synthesized and used in the excess of PEG formed transparent polymeric hydrogels resistant to syneresis under certain conditions. The titanium polyethylene glycolates synthesized without excess of PEG formed turbid heterogeneous colloidal gels. In the case of silicon polyethylene glycolates the hydrogels obtained were polymeric. Dynamic light scattering was used to confirm the polymeric or colloidal type of gelation. The solid and liquid phases of polymeric silicon- and titanium-polyethylene glycol hydrogels were separated by exhaustive extraction. The solid phase was characterized by combined thermal analysis with simultaneous quadruple mass spectrometry, XRD, IR spectroscopy, and liquid phase-atomic emission spectroscopy. The structural features of polymeric gels were investigated by SEM and TEM methods. The cross-linking density of polymeric hydrogels was evaluated using Flory-Rehner theory based on the mechanical properties of swollen networks of flexible polymeric chains

\\\\expert2\\nbo\\Journal of Materials Chemistry B\\2015. V. 3, N 27. P. 5490-5500.pdf
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8.
Инвентарный номер: нет.
   
   I-70


   
    Investigation of regularities, mechanism of formation, and structure of hydrogels based on silicon - and titanium polyolates / T. G. Khonina, M. V. Ivanenko, E. V. Shadrina, O. N. Chupakhin // Третья международная конф. стран СНГ "Золь-гель синтез и исследование неорганических соединений, гибридных функциональных материалов и гибридных систем" "Золь-гель 2014", Суздаль, 8-12 сентября 2014 г. : докл. - Суздаль, 2014. - С. 24. - Bibliogr. : p. 24 (2 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HYDROGELS -- TITANIUM POLYOLATES

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9.
Инвентарный номер: нет.
   
   I-70


   
    Investigation of Regularities, Mechanism of Formation, and Structure of Hydrogels based on Silicon and Titanium Polyolates / T. G. Khonina, M. V. Ivanenko, E. V. Shadrina, O. N. Chupakhin // Третья международная конференция стран СНГ «Золь-гель 2014», Суздаль, 8–12 сентября 2014 г. : тез. докл. - Суздаль, 2014. - С. 24
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HYDROGELS -- TITANIUM POLYOLATES -- SILICON POLYOLATES

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10.
Инвентарный номер: нет.
   
   I-70


   
    Investigation of the structure of chitosan hybrid systems by pH-sensitive nitroxyl radical [Electronic resource] / A. V. Mekhaev, A. V. Pestov, L. S. Molochnikov, E. G. Kovaleva, Yu. G. Yatluk, I. A. Grigor'ev, I. A. Kirilyuk // Russian Journal of Physical Chemistry A, Focus on Chemistry. - 2011. - Vol. 85, № 6. - P987-992. - Bibliogr. : p. 991-992 (24 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Hybrid organo-inorganic materials based on the chitosan-SiO2, chitosan-Al2O3, and chitosancellulose systems are prepared. The structure of the surface is studied by means of EPR spectroscopy using the stable pH-sensitive nitroxyl radical, 4-dimethylamino-2-ethyl-5,5-dimethyl-2-pyridine-4-yl-2,5-dihydro-1H-imidazole-1-oxyl as adsorbed probe molecules, and the processes that occur during the formation of hybrid materials are considered

\\\\Expert2\\nbo\\Russian Journal of Physical Chemistry A, Focus on Chemistry\\2011, V.85, N 6, p.987.pdf
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11.
Инвентарный номер: нет.
   
   M 45


   
    Mechanism of structural networking in hydrogels based on silicon and titanium glycerolates / T. G. Khonina, A. P. Safronov, E. V. Shadrina, M. V. Ivanenko, A. I. Suvorova, O. N. Chupakhin // Journal of Colloid and Intrface Science. - 2012. - Vol. 365, № 1. - С. 81-89
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HOFMEISTER SERIES -- TITANIUM–GLYCEROL HYDROGELS -- SCHULTZE–HARDY RULE
Аннотация: Formation of organic/inorganic hydrogels based on silicon– and titanium–glycerol precursors synthesized by transesterification of alkoxy derivatives in excess of glycerol was investigated. The precursors in excess of glycerol and obtained gels were studied by chemical and physical methods including gelation kinetics, IR spectroscopy, XRD, dynamic and electrophoretic light scattering, mechanical deformation, which disclosed the basic difference in the gelation mechanism and structure of network in the hydrogels. Due to this difference, the gelation time of silicon– and titanium–glycerol precursors depended on pH or electrolyte addition in an opposite way. In the wide pH range, silicon–glycerol hydrogel was a polymeric single-phase system formed by the polymeric network homogeneously swollen in liquid water/glycerol medium. Flory–Rehner theory applied to the elastic modulus of these gels gave 40–180 monomer base units in the subchains of the network depending on water content in the gel. The mechanism of networking was three-dimensional polycondensation promoted by the electrically charged functional groups attached to the flexible polymeric chains. Electrolyte solutions provided the gelation according to Hofmeister series. Titanium–glycerol hydrogels were heterogeneous colloid systems at pH > 1.5 and single-phase polymeric gels at lower pH. Electrolyte solutions provided the gelation according to Schultze–Hardy rule

\\\\Expert2\\nbo\\Journal of Colloid and Interface Science\\2012, v.365, p.81.pdf
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12.
Инвентарный номер: нет.
   
   M 61


   
    Metal and silicon oxides as efficient catalysts for the preparative organic chemistry [Electronic resource] / Yu. A. Titova, O. V. Fedorova, G. L. Rusinov, V. N. Charushin // Russian Chemical Reviews. - 2015. - Т. 84, № 12. - С. 1294-1315. - Bibliogr. : p. 1312-1315 (189 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
SILICON OXIDES -- METAL OXIDES
Аннотация: Data on the use of metal and silicon oxides as catalysts of reactions which are most in demand in laboratory organic syntheses are summarized. The potential of oxide catalysts for optimization of organic reactions is demonstrated, and some mechanistic aspects of oxide action are considered. Published data on the synthetic use of single, mixed, bulk and nanosized metal and silicon oxides are presented.

\\\\expert2\\nbo\\Russian Chemical Reviews\\2015, V.84, N12, p. 1294-1315.pdf
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13.
Инвентарный номер: нет.
   
   N 52


   
    New hybrid chelating sorbents with grafted 3-aminopropionate groups based on mixed silicon, aluminum, titanium, or zirconium oxides [Electronic resource] / Yu. G. Yatluk, N. A. Zhuravlev, O. V. Koryakova, L. K. Neudachina, Yu. A. Skorik // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2005. - Vol. 54, № 8. - P1836-1841
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A series of new hybrid organo-inorganic sorbents with the 3-aminopropionate chelating group was synthesized. The synthesis includes the copolycondensation (sol—gel method) of tetraethoxysilane, 3-aminopropyltriethoxysilane, and several modifiers (MeSi(OEt)3, EtSi(OEt)3, Ti(OEt)4, AlONO3, ZrOCl2) followed by carboxyethylation with acrylic acid. The obtained chelating sorbents were characterized by elemental analysis, FT-IR and 1H NMR spectroscopy, and thermogravimetry. The N-carboxylated sorbents have a higher sorption capacity with respect to metal ions (0.5–0.9 mmol g?1, pH 6.3, NH4OAc, 20 °C) than the starting sorbents with the primary amino group (0.05–0.2 mmol g?1) and manifest high selectivity for copper(II) ion extraction

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2005, 54 (8), 1836.pdf
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14.
Инвентарный номер: нет.
   
   N 52


   
    New hybrid chitosan-silicone-containing glycerohydrogels [Electronic resource] / E. Yu. Larchenko, E. V. Shadrina, T. G. Khonina, O. N. Chupakhin // Mendeleev Communications. - 2014. - Vol.24, №4. - С. 201-202. - Bibliogr. : p. 202 (20 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CHITOSAN -- GLYCEROHYDROGELS -- SOL-GEL METHOD
Аннотация: New biologically active hybrid chitosan-silicone-containing glycerohydrogels based on chitosan and silicon glycerolates were synthesized by a sol-gel method; the effect of silicon glycerolates and chitosan concentrations on the process of gel formation was evaluated.

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15.
Инвентарный номер: нет.
   
   N 52


   
    New hybrid chitosan–silicone-containing glycerohydrogels [Electronic resource] / E. Yu. Larchenko, E. V. Shadrina, T. G. Khonina, O. N. Chupakhin // Mendeleev Communications. - 2014. - Vol.24. - С. 201-202
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CHITOSAN -- GLYCEROHYDROGELS -- SILICON GLYCEROLATES
Аннотация: New biologically active hybrid chitosan–silicone-containing glycerohydrogels based on chitosan and silicon glycerolates were synthesized by a sol–gel method; the effect of silicon glycerolates and chitosan concentrations on the process of gel formation was evaluated.

\\\\expert2\\nbo\\Mendeleev Communications\\2014, v.24, p. 201-202.pdf
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16.
Инвентарный номер: нет.
   
   N 89


    Novoselova, M. E.
    Formation regularities of silicon-polysaccaride-containing polyolate hydrogels / M. E. Novoselova, M. V. Ivanenko, E. Yu. Nikitina, T. G. Khonina // Современные синтетические методологии для создания лекарственных препаратов и функциональных материалов (MOSM2018): вторая международная научно-практическая конференция : материалы и доклады. - Екатеринбург, 2019. - С. 120
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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17.
Инвентарный номер: нет.
   
   O-57


   
    One-Pot Synthesis and Asymmetric Oxidation of 2-Nitro-4-(Trifluoromethyl)Benzene Containing Sulfides / K. S. Rodygin, S. A. Rubtsova, A. V. Kutchin, P. A. Slepukhin // Phosphorus, Sulfur, and Silicon and the Related Elements. - 2011. - Vol. 186, № 9. - С. 1885-1894
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
TRIFLUOROMETHYL -- SULFIDES -- SULFOXIDES
Аннотация: An efficient one-pot method for the preparation of 2-nitro-4-(trifluoromethyl)benzene containing sulfides from 1,1?-disulfanediylbis[2-nitro-4-(trifluoromethyl)benzene] is proposed. The corresponding enantiomerically enriched sulfoxides with up to 78% enantiomeric excess are prepared by the asymmetric oxidation of sulfides using a modified Sharpless method. The yield of sulfoxides is shown to decrease with an increase in the bulk of the aliphatic group and with a decrease of the inductive effect of the hydrocarbonic moiety on the sulfur atom.????Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file??

\\\\Cserver\\dist\\НБО\\Электронная библиотека_Библиогр1\\Phosphorus, Sulfur, and Silicon and the Related Elements\\2011, V. 186, № 9, P. 1885.pdf
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18.
Инвентарный номер: нет.
   
   T 44


    Rusinov, V. L.
    The scintillator tile hadronic calorimeter prototype [Text] / V. L. Rusinov // Nuclear Physics B, Proceedings Supplements. - 2006. - Vol. 150: Innovative Particle and Radiation Detectors. - P253-256
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A high granularity scintillator hadronic calorimeter prototype is described. The calorimeter is based on a novel photodetector - Silicon Photo-Multiplier (SiPM). The main parameters of SiPM are discussed as well as readout cell construction and optimization. The experience with a small prototype production and testing is described. A new 8 k channel prototype is being manufactured now.

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19.
Инвентарный номер: нет.
   
   S 85


   
    Stnthesis, toxicity, and percutaneous activity of silicon glycerolates and related hydrogels [Electronic resource] / T. G. Khonina, O. N. Chupakhin, L. P. Larionov, T. G. Boyakovskaya, A. L. Suvorov, E. V. Shadrina // Pharmaceutical Chemistry Journal. - 2008. - Vol. 42, № 11. - P609-613 : il. - Bibliogr. : p. 612 (12 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
SILICON -- SILICON GLYCEROLATES -- HYDROGELS -- SYNTHESIS -- TOXICITY -- PERCUTANEOUS ACTIVITY

\\\\Expert2\\nbo\\Pharmaceutical Chemistry Journal\\2008, 42 (11), 609.pdf
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20.
Инвентарный номер: нет.
   
   S 90


   
    Study of scintillator strip with wavelength shifting fiber and silicon photomultiplier [Text] / V. Balagura, M. Danilov, B. Dolgoshein, S. Klemin, R. Mizuk, P. Pakhlov, E. Popova, V. L. Rusinov, E. Tarkovsky, I. Tikhomirov // Nuclear Instruments & Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. - 2006. - Vol. 564, № 1. - P590-596
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The performance of the 200*2.5*1 cm3 plastic scintillator strip with wavelength shifting fiber read out by two novel photodetectors called Silicon PhotoMultipliers (SiPMs) is discussed. The advantages of SiPM relative to the traditional multichannel photomultiplier are shown. Light yield and light attenuation measurements are presented. This technique can be used in muon or calorimeter systems.

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