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AbstractAbstract
[en] Full text:The copolymerization reaction of ρ-(substituted) cyclopropyl styrene's with styrene has been studied. An influence of substituent's on reactivity of ρ-(substituted) cyclopropyl styrene's has been investigated. The copolymerization constant values and Q-e parameters of Alfrey-Praice scheme have been calculated. The parameters of microstructure of copolymers have been determined
Original Title
Radikalnaya sopolimerizasiya ?- (2-zameshennix) siklopropilstirolov so stirolom
Primary Subject
Source
Available in abstract form only, full text entered in this record; Translated from Russian
Record Type
Journal Article
Literature Type
Translation
Journal
Azerbajdzhanskij Khimicheskij Zhurnal; ISSN 0005-2531;
; v. 168(5); 5 p

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AbstractAbstract
[en] Asymmetric hydrosilylation was one of the most effective methods, which provided optically active organosilanes as a synthetically useful intermediate in organic synthesis. One useful transformation is the Tamao-Fleming oxidation, which is an oxidation reaction of carbon[BOND]silicone bond to afford optically active alcohols with retention of configuration. It is demonstrated that a palladium catalyst coordinating with phosphoramidite ligand (S _a,R _c,R _c_,)-L3a from (S)-BINOL and chiral bis((R)-1-ferrocenylethyl) amine shows a high catalytic activity and enantioselectivity up to 97% ee in asymmetric hydrosilylation of styrene and its derivatives. The hydrosilylation of various olefin substrates using these ligands is in progress
Primary Subject
Source
9 refs, 2 figs, 1 tab
Record Type
Journal Article
Journal
Bulletin of the Korean Chemical Society; ISSN 0253-2964;
; v. 37(6); p. 795-796

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Reference NumberReference Number
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Novembre, A.E.; Knurek, C.S.; Kometani, J.M.; Kumar, U.; Mixon, D.A.; Alonzo, J.C.
208th ACS national meeting1994
208th ACS national meeting1994
AbstractAbstract
[en] An advanced lithographic technology currently under investigation for integrated circuit fabrication having design rules of ≤ 0.20 μm is proximity x-ray lithography. High intensity x-rays produced using either a synchrotron storage ring or laser-produced plasma sources have been shown to meet the requirements for use in x-ray lithography. To offset the cost and space requirements of a synchrotron source, a pulsed laser point source x-ray stepper has been manufactured and is being evaluated at AT ampersand T. Numerous positive and negative tone resist formulations based on conventional and chemical amplification (CA) processes have been investigated. Resist performance criteria include resolving ≤ 0.20 μm line and space pairs in 0.40 μm thick films using an incident x-ray exposure dose of ≤ 20 mJ/cm2. Single and multi-component CA resists consisting of 4-t-butoxycarbonyloxystyrene sulfone coplymers have been found to be leading candidates for positive acting x-ray resists. Addition of poly(2-methyl-1-pentene sulfone) to a novolac resin is shown to produce positive tone patterns when exposed to x-radiation. Submicron imaging in this resist is attainable but certain requirements such as having a high contrast x-ray mask are required. Negative CA resists are shown to produce high resolution patterns, but exhibit restricted process latitude when compared to conventional crosslinking negative resists. These resists however at present do not provide the resolution level needed in x-ray lithography. Future changes in the exposure wavelength, improvements in the delivery of the pulsed laser power of the x-ray point source should broaden the candidates of resists compatible with this advanced lithographic technology
Primary Subject
Secondary Subject
Source
Anon; 2072 p; 1994; p. 1525-1527, Paper POLY 510; American Chemical Society; Washington, DC (United States); 208. American Chemical Society national meeting; Washington, DC (United States); 21-26 Aug 1994; American Chemical Society, 1155 16th St., NW, Washington, DC 20036-4899 (United States)
Record Type
Book
Literature Type
Conference
Country of publication
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AbstractAbstract
[en] Waste expanded polystyrene (EPS) represents a source of valuable chemical products like styrene and other aromatics. The catalytic degradation was carried out in a batch reactor with a mixture of polystyrene (PS) and catalyst at 450 .deg. C for 30 min in case of Mg and at 400 .deg. C for 2 h both for MgO and MgCO_3 catalysts. At optimum degradation conditions, EPS was degraded into 82.20±3.80 wt%, 91.60±0.20 wt% and 81.80±0.53 wt% liquid with Mg, MgO and MgCO_3 catalysts, respectively. The liquid products obtained were separated into different fractions by fractional distillation. The liquid fractions obtained with three catalysts were compared, and characterized using GC-MS. Maximum conversion of EPS into styrene monomer (66.6 wt%) was achieved with Mg catalyst, and an increase in selectivity of compounds was also observed. The major fraction at 145 .deg. C showed the properties of styrene monomer. The results showed that among the catalysts used, Mg was found to be the most effective catalyst for selective conversion into styrene monomer as value added product
Primary Subject
Source
33 refs, 8 figs, 5 tabs
Record Type
Journal Article
Journal
Korean Journal of Chemical Engineering; ISSN 0256-1115;
; v. 31(8); p. 1389-1398

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Reference NumberReference Number
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Holzer, G.; Hathcock, S.L.; Bertsch, W.
Proceedings of the 3. Latin American Congress of Chromatography1990
Proceedings of the 3. Latin American Congress of Chromatography1990
AbstractAbstract
[en] Published in summary form only
Primary Subject
Source
Lancas, F.M. (Universidade de Sao Paulo; Instituto de Fisica e Quimica de Sao Carlos. 13560 - Sao Carlos, SP (Brazil)); Sao Paulo Univ., Sao Carlos, SP (Brazil). Inst. de Fisica e Quimica; 183 p; 1990; p. 125; 3. Latin American Congress on Chromatography; Aguas de Sao Pedro, SP (Brazil); 14-16 Mar 1990
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Park, Sang-Min; Park, Oun-Ho; Cheng, Joy Y; Rettner, Charles T; Kim, Ho-Cheol, E-mail: hckim@us.ibm.com2008
AbstractAbstract
[en] We report the formation and directed self-assembly of sub-10 nm half-pitch line patterns from lamellar microdomains of a block copolymer hybrid. The hybrid, which is a mixture of poly(styrene-b-ethylene oxide) (PS-b-PEO) and a low molecular weight organosilicate (OS), shows strong segregation between two phases (i.e. PS and PEO+OS) and forms lamellar microdomains of down to approximately 7 nm in half-pitch. Patterns applicable to multifinger device layouts are created by self-assembling the hybrid on topographic pre-patterns with a chemically non-selective surface. With careful design of the guiding topographic pattern geometry, well-controlled lateral placement including bent structures of lamellar microdomains can be obtained by this approach.
Primary Subject
Source
S0957-4484(08)88769-7; Available from http://dx.doi.org/10.1088/0957-4484/19/45/455304; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Nanotechnology (Print); ISSN 0957-4484;
; v. 19(45); [6 p.]

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Reference NumberReference Number
INIS VolumeINIS Volume
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Gao, Li-ping; Wei, Jian; Wang, Yue-chuan; Ding, Guo-jing; Yang, Yu-lin, E-mail: glpwwl@163.com, E-mail: wangyc@scu.edu.cn2012
AbstractAbstract
[en] New optical writing and electrical erasing devices have been successfully fabricated that exploit the photochromism and electrochromism of viologen. In a preliminary study, both the structures of viologen and device were investigated in detail by UV–vis spectra in order to confirm their effects on the optical writing and electrical erasing performances of corresponding devices. For sandwiched, single and complementary devices based on benzyl viologen (BV 2+), only optical writing can be performed, not electrical erasing operations, which indicated these devices cannot realize optical information rewriting. For single and complementary devices based on styrene-functional viologen (V BV 2+) and acrylic-functional viologen (ACV 2+), optical writing and electrical erasing operations can be reversibly performed and optical information rewriting realized. It is clear that single devices based on V BV2+ and ACV2+ possess better performance accompanied with contrast without significant degradation and bleaching times and without significant deterioration over 10 repeated writing/erasing cycles. Furthermore, we put forward possible mechanisms for sandwiched, single and complementary devices based on V BV2+ and ACV2+ for the optical writing and electrical erasing operations. This study provides a new strategy to design optical writing and electrical erasing devices to realize optical information rewriting. (paper)
Primary Subject
Source
Available from http://dx.doi.org/10.1088/0964-1726/21/8/085006; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Smart Materials and Structures (Print); ISSN 0964-1726;
; v. 21(8); [10 p.]

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Reference NumberReference Number
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Hamada, M.M.; Mesquita, C.H.; Silva, C.P.G. da.
Instituto de Pesquisas Energeticas e Nucleares, Sao Paulo, SP (Brazil)1988
Instituto de Pesquisas Energeticas e Nucleares, Sao Paulo, SP (Brazil)1988
AbstractAbstract
[en] We have developed a solid phase radioimmunoassay (RIA) system for triiodothyronine (T3), by immobilizing triiodothyronine antibodies on the inner wall of reaction tubes. The antibody-coated tubes were made via reaction of antibody with glutaraldeyde residue pre coated on the inner wall of the tubes by alkaline self-polimerization. The quality of the coated tubes was tested through its performance in the RIA methodology, by analysing the following RIA parameters: minimum detectable dose (MDD), nonspecific binding (NSB), ''X50%'', slope of the standard curve, intra and inter-assay precision, accuracy of the method and figure of merit. The serum levels of T3 in hypothyroid and hyperthyroid patients and the normal values range were determined for the solid phase RIA system. The results are in agreement with found in the literature. (author)
[pt]
Desenvolveu-se um sistema de radioimunoensaio (RIE) do hormonio T3 pela tecnica de ''fase solida'', imobilizando-se anticorpo, anti-T3 em tubos de polipropileno pre-recobertos com glutaraldeido polimerizado em meio alcalino. Avaliou-se a qualidade dos tubos recobertos pelo desempenho metodologico no RIE, analisando os diversos parametros do ensaio, a saber: a dose minima detectavel, a ligacao inespecifica (NSB), ''X50%'', a inclinacao da curva, a precisao intra e inter-ensaio, exatidao do metodo e digito de merito. Os intervalos de valores da concentracao de T3 no soro de individuos hipotiroideos e hipertiroideos e a faixa de normalidade de T3 foram determinados para esta tecnica, estando de acordo com a literatura. (autor)Original Title
Desenvolvimento de uma tecnica de fase solida para radioimunoensaio do hormonio triiodotironina (T3) no soro
Primary Subject
Source
Oct 1988; 18 p
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Report
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LanguageLanguage
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Dahlan bin Haji Mohd; Hussin bin Mohd Nor; Mohamad Hilmi bin Mahmood.
Unit Tenaga Nuklear, Bangi, Selangor (Malaysia)1989
Unit Tenaga Nuklear, Bangi, Selangor (Malaysia)1989
AbstractAbstract
[en] Two types of unsaturated polyester have been prepared according to normal alkyd methods of preparation. In this work the emphasis has been given to the preparation methodology of unsaturated polyesters in styrene. Their molecule weight distributions fall between normal alkyd's i.e. 2500 to 3500. (author)
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Secondary Subject
Source
1989; 23 p
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Report
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AbstractAbstract
[en] Tritium-labelled (E)- and (Z)-2,3-dimethyl-2-phenyl oxirane 4, (E)-and (Z)-2-methyl-3-phenyl oxirane 7 and 2,2-dimethyl-3-phenyl oxirane 11 have been prepared by reduction of the corresponding bromoketones with sodium borotritide to the corresponding bromohydrins followed by cyclization to the oxiranes. These oxiranes were successfully used as diagnostic substrates to distinguish between different forms of epoxide hydrolase and glutathione transferase. (author)
Record Type
Journal Article
Journal
Journal of Labelled Compounds and Radiopharmaceuticals; ISSN 0362-4803;
; CODEN JLCRD; v. 25(11); p. 1209-1217

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