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51.
The effect of temperature on the yields of 1,2-alkanediols in the -radiolysis of the methanol(or ethanol)–formaldehyde (0.9 M) systems and on the yields of 1,2-alkanediols, carbonyl compounds, methanol, and ethanol in the -radiolysis of the 1-propanol(or 2-propanol)–formaldehyde (1 M) systems was studied over the range 373–473 K. It was found that the temperature dependence of the yields of 1,2-butanediol and 2-methyl-1,2-propanediol exhibited maximums at 423 and 373 K, respectively. 相似文献
52.
E. S. Sashina O. I. Dubkova N. P. Novoselov J. J. Goralsky M. I. Szynkowska E. Lesniewska W. Maniukiewicz G. Strobin 《Russian Journal of Applied Chemistry》2009,82(6):974-980
Possibility of obtaining silver nanoparticles on fibers and films of silk fibroin was studied. A comparative assessment of the effect of reducing agents on the morphology and size of silver particles on the fiber surface was made. 相似文献
53.
Mikhailovskaya A. P. Dyankova T. Yu. Novoselov N. P. 《Russian Journal of Applied Chemistry》2001,74(3):466-468
The capability of cationic dyes in which the onium group is not conjugated with the chromophore system to form aqueous dispersions in a weakly alkaline medium was examined. Such dyes can be fixed on a fiber in increased amounts owing to their binding not only in the cationic form but also in the hydrolyzed monomolecular form. 相似文献
54.
S. Motycak A. M. Rodin A. S. Novoselov A. V. Podshibyakin L. Krupa A. V. Belozerov V. Yu. Vedeneyev A. V. Gulyaev A. V. Gulyaeva J. Kliman V. S. Salamatin S. V. Stepantsov E. V. Chernysheva S. A. Yuchimchuk A. B. Komarov D. Kamas 《Physics of Particles and Nuclei Letters》2016,13(5):586-590
A new beam diagnostic system based on the PXI standard was developed, tested, and used in the MASHA setup experiment. The beam energy and beam current measurements were carried out using several methods. The online time-of-flight energy measurements were carried out using three pick-up detectors. We used two electronic systems to measure the time between the pick-ups. The first system was based on fast Agilent digitizers (2-channel, 4-GHz sampling rate), and the second one was based on a constant fraction discriminator (CFD) connected to a time-to-digital converter (TDC, 5-ps resolution). A new graphical interface to monitor the electronic devices and to perform the online calculations of energy was developed using MFC C++. The second system based on microchannel plate (time-of-flight) and silicon detectors for the determination of beam energy and the type of accelerated particles was also used. The beam current measurements were carried out with two different sensors. The first sensor is a rotating Faraday cup placed in front of the target, and the second one is an emission detector installed at the rear of the target. This system is now used in experiments for the synthesis of superheavy elements at the U400M cyclotron of the Flerov Laboratory of Nuclear Reactions (FLNR). 相似文献
55.
A. V. Berezhnoy A. K. Likhoded A. V. Luchinsky A. A. Novoselov 《Physics of Atomic Nuclei》2013,76(1):102-112
Cross sections for J/ψ mesons produced in association with open charm and two charmed hadrons from different $c\bar c$ pairs under LHC conditions are predicted theoretically. The respective processes are considered both in single and in double parton interactions. Particular attention is given to kinematical limits of the LHCb detector, and a comparison with the most recent experimental data is performed for them. 相似文献
56.
N. P. Novoselov E. S. Sashina O. G. Kuz’mina S. V. Troshenkova 《Russian Journal of General Chemistry》2007,77(8):1395-1405
The experimental and calculated data on the structure and properties of ionic liquids are presented. The prospects for their use as the solvents for natural polymers are considered. 相似文献
57.
Strong suppression of weak localization in graphene 总被引:1,自引:0,他引:1
Morozov SV Novoselov KS Katsnelson MI Schedin F Ponomarenko LA Jiang D Geim AK 《Physical review letters》2006,97(1):016801
Low-field magnetoresistance is ubiquitous in low-dimensional metallic systems with high resistivity and well understood as arising due to quantum interference on self-intersecting diffusive trajectories. We have found that in graphene this weak-localization magnetoresistance is strongly suppressed and, in some cases, completely absent. The unexpected observation is attributed to mesoscopic corrugations of graphene sheets which can cause a dephasing effect similar to that of a random magnetic field. 相似文献
58.
Partial widths with respect to the exclusive decays of Standard Model Higgs bosons to pairs of vector quarkonia, H → J/ψJ/ψ, H → YY, H → J/ψϕ, and H → J/ψY, were calculated with allowance for relativistic corrections associated with the internal motion of quarks in qarkonia. 相似文献
59.
D. O. Ruzanov D. V. Samoilov K. V. Gensh Yu. E. Zevatskii N. P. Novoselov 《Russian Journal of General Chemistry》2011,81(6):1153-1158
A new differentiating medium for the study of prototropic equilibria is proposed: acetonitrile with a small addition of DMSO.
From the dependence of the picric acid pK
a on the content of DMSO in this medium the optimum composition of the mixture was found ensuring the stability of the pK
a values with minimal addition of DSMO: 4 wt %. It was experimentally confirmed that the addition of water in an amount up
to 0.1 wt % has virtually no effect on the measured pK
a value in a mixture with the optimum composition. 相似文献
60.
Stanislav Ya. Umanskii Konstantin P. Novoselov Airat Kh. Minushev Magdalena Siodmiak Gernot Frenking Anatoli A. Korkin 《Journal of computational chemistry》2001,22(13):1366-1376
Thermodynamic equilibrium and kinetics of the gas‐phase reaction between TiCl4 and NH3 have been studied computationally using results from recent quantum mechanical calculations of titanium tetrachloride ammonolysis. 1 These calculations were based upon the transition state theory for the direct reactions and RRKM theory for the reactions proceeding via intermediate complex. Rate constants for the barrierless reactions were expressed through the thermodynamic characteristics of the reagents and products using a semiempirical variational method. The kinetic simulation of the gas‐phase steps of CVD was performed within a model of a well‐stirred reactor at temperatures 300–1200 K and residence times between 0.1–2 s. At temperatures below 450 K formation of donor–acceptor complexes between TiCl4 and NH3 is the dominating process. At higher temperatures sequential direct ammonolysis takes place. At typical LPCVD conditions the only product of the first step of ammonolysis, TiCl3NH2, is formed in substantial amount. © 2001 John Wiley & Sons, Inc. J Comput Chem 22: 1366–1376, 2001 相似文献