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1.
2.
A. I. Zinin V. I. Torgov V. N. Shibaev A. S. Shashkov W. J. Broughton 《Russian Chemical Bulletin》1998,47(3):496-501
Trisaccharide analogs of natural nodulation factors fromRhizobium sp. NGR234, namely, 2-acetamido-2-deoxy-4-O-(2-deoxy-2-hexadecanamido-β-d-glucopyranosyl)-6-O-(2-O-methyl-α-l-fucopyranosyl)-d-glucopyranose and its derivatives containing a 4-O-acetyl or a 3-O-sulfo group at thel-fucose residue, were synthesized. The oligosaccharides synthesized were shown to posses biological activity.
Laboratoire de Biologie Moléculaire des Plantes Supérieures (LBMPS), Université de Genève, 1 ch. de l'Impératrice, 1292 Chambesy-Genève,
Suisse.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya No. 3, pp. 513–518, March, 1998. 相似文献
3.
P. V. Zinin L. C. Ming I. Kudryashov N. Konishi S. K. Sharma 《Journal of Raman spectroscopy : JRS》2007,38(10):1362-1367
A direct transformation of the g‐BC3 phase to a new diamond‐like d‐BC3 phase was observed in a diamond‐anvil cell (DAC) at high temperature, 2033 ± 241 K, and high pressure, 50 GPa. Analysis of the peak positions of the d‐BC3, B4C, α‐boron, and the boron‐doped diamond leads to the conclusion that the positions of the peaks of the d‐BC3 are more similar to the peak pattern of the boron‐doped diamond rather than that of boron carbide, α‐boron. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
4.
KM Varier AM Vinodkumar NVSV Prasad PV Madhusudhana Rao DL Sastry Lagy T Baby MC Radhakrishna NG Puttaswamy JJ Das P Sugathan N Madhavan AK Sinha DO Kataria 《Pramana》1999,53(3):529-533
Large enhancements have been observed in the sub-barrier fusion cross sections for Ti+Ni systems in our previous studies.
Coupled channel calculations incorporating couplings to 2+ and 3− states failed to explain these enhancements completely. A possibilty of transfer channels contributing to the residual enhancements
had been suggested. In order to investigate the role of relevant transfer channels, measurements of one- and two-nucleon transfer
were carried out for 46,48Ti+61Ni systems. The present paper gives the results of these studies. 相似文献
5.
A. V. Vorogushin M. D. Reshetova N. G. Akhmedov Yu. A. Ustynyuk I. L. Eremenko S. E. Nefedov A. I. Zinin 《Russian Chemical Bulletin》1998,47(4):699-703
The reaction of Cr(CO)6 with 7,7-dichloro-3,4-benzobicyclo[4.1.0]heptane gave the correspondingexo- andendo-chromium tricarbonyl complexes in a ratio of 4.5:1. The structures of the resulting compounds were established by NMR spectroscopy,
mass spectrometry, and X-ray structural analysis. Reduction of dichlorobenzobicycloheptane and its chromium tricarbonyl complexes
with LiAlH4 affordedexo- andendo-7-chloro-3,4-benzobicyclo[4.1.0]heptanes in a 3.5:1 ratio.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 720–724, April, 1998. 相似文献
6.
7.
Industrial sediments of calcium sulfate semihydrate obtained from industrial extraction phosphoric acid and containing 0.3–4.5 wt % of impurity La?Sm are investigated by energy-dispersive X-ray fluorescence analysis (XRFA) and a procedure for the quantitative determination of cerium lanthanides in the sediments is developed. The use of linear regression analysis of X-ray fluorescence spectra of multielement industrial samples and models of individual compounds NaLn(SO4)2 · H2O (cp grade) allowed us to resolve overlaps of spectral L-series lines for La–Sm, eliminate the background, and perform the regression assessment of line intensities of these elements. On this basis, we developed a procedure for the determination of La, Ce, Pr, Nd, and Sm in CaSO4 · 0.5H2O sediments with limits of detection (wt %): 0.022, 0.013, 0.011, 0.008, and 0.008, respectively. In concentration ranges (wt %) La (0.05–0.99), Ce (0.1–4.9), Pr (0.005–0.49), Nd (0.02–0.99), and Sm (0.005-0.19), the relative standard deviation RSD (n = 10, P = 0.95) was 18?27, 9?18, 20?31, 17?26, and 19?31%, respectively. A comparison of the results of XRFA with the data of inductively coupled plasma mass spectrometry confirms the accuracy of the results obtained according to OST (Branch Standard) 41-08-221-04. 相似文献
8.
Nikita M. Podvalnyy Alexander I. Zinin Nelly N. Malysheva Roman A. Kunetskiy 《Journal of carbohydrate chemistry》2013,32(5):213-224
A convenient synthesis and separation of α- and β-anomers of methyl (phenyl 3,5-dideoxy-2-thio-5-trifluoroacetamido-D-glycero-D-galacto-nonulopyranosid)onate (6a and 6b) on a multigram scale was developed. Both α- and β-isomers of 6 were obtained as crystals suitable for safe storage. The β-isomer forms a crystalline solvate with methanol. Fully O-trichloroacetylated and O-trifluoroacetylated N-trifluoroacetyl thiosialosides were synthesized in an efficient manner from the β-tetraol 6b. 相似文献
9.
In this paper we present two algorithms for reducing systems of multivariate polynomial equations over the finite field F 2 to the canonical triangular form called lexicographical Gröbner basis. This triangular form is the most appropriate for finding solutions of the system. On the other hand, the system of polynomials over F 2 whose variables also take values in F 2 (Boolean polynomials) completely describes the unitary matrix generated by a quantum circuit. In particular, the matrix itself can be computed by counting the number of solutions (roots) of the associated polynomial system. Thereby, efficient construction of the lexicographical Gröbner bases over F 2 associated with quantum circuits gives a method for computing their circuit matrices that is alternative to the direct numerical method based on linear algebra. We compare our implementation of both algorithms with some other software packages available for computing Gröbner bases over F 2. 相似文献
10.
A. M. Kibardin T. Kh. Gazizov Yu. Ya. Efremov V. N. Zinin R. Z. Musin A. N. Pudovik 《Russian Chemical Bulletin》1980,29(4):656-660
Conclusions Trialkyl phosphites react with 1,1,1-trifluoroacetone to give 2,2,2-trialkoxy-3,5-dimethyl-3,5-bis(trifluoromethyl)-1,4,2-dioxaphospholanes, which slowly isomerize to trialkoxy--trifluoromethyl--(1-methyl-2,2-difluorovinyloxy)ethoxyfluorophosphoranes.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 910–914, April, 1980. 相似文献