排序方式: 共有10条查询结果,搜索用时 15 毫秒
1
1.
V. V. Fimushkin A. S. Belov A. D. Kovalenko L. V. Kutuzova Yu. V. Prokofichev S. S. Shimanskiy V. P. Vadeev 《The European physical journal. Special topics》2008,162(1):275-280
The proposed project assumes the development of a universal high-intensity source of polarized deuterons (protons) using a
charge-exchange plasma ionizer. The design output current of the source will be up to 10mA for ↑ D+(↑ H+) and polarization will be up to 90% of the maximal vector (±1) and tensor (+1,−2) polarization. The project is based on the
equipment which was supplied within the framework of an agreement between JINR and IUCF (Bloomington, USA). The project will
be realized in close cooperation with INR (Moscow, Russia). The source will be installed in the linac hall (LU-20) and polarization
of beams will be measured at the output of LU-20. The main purpose of the project is to increase the intensity of the accelerated
polarized beams at the JINR Accelerator Complex up to 1010 d/pulse. Calculations and first accelerator runs have shown that the depolarization resonances are absent for the deuteron
beam in the entire energy range of the NUCLOTRON. The source could be transformed into a source of polarized negative ions
if necessary. The period of reliable operation without participation of the personnel should be within 1000 hours. The project
should be implemented within two to two and a half years from the start of funding. 相似文献
2.
Olga Leont’eva Galinka Kutuzova Eugeny Skripkin Natalia Ugrarova 《Applied biochemistry and biotechnology》1996,61(1-2):109-122
The kinetics ofPhotinus pyralis andLuciola mingrelica luciferase gene expression was studied on plasmids with the thermoinducible λPr promoter inEscherichia coli by SDS-gel electrophoresis of cell lysates to follow luciferase protein-synthesized, enzyme immunoassay (EIA) to follow native enzyme conformer, and the luciferase activity assay.E. coli cells were cultivated at temperature schemes 28–42–21°C or 28–21°C, or at alkali pH shift. In the cases of thermoinduction and pH shift, the luciferase expressions have similar features. The 3-h thermoinduction (42°C) followed by the incubation at 21°C, for 10 h resulted in the maximal amount of the luciferase protein of 4–5% of the total cell proteins. The yield did not change further. The amount of native luciferase conformer and the luciferase activity started to grow after incubation for 10 h at 21°C and reached the maximum after 50–60 h when the synthesized luciferase protein adopted the native-like conformation. At the same time, only 50% of the latter appeared to be catalytically active. An increase in the enzymatic activity correlates with an increase in the intracellular pH and ATP content. Intracellular metabolic reactions were shown to play a role in the conformational changes of the enzyme in a postthermoinduction period, and a possible mechanism of this effect is proposed. 相似文献
3.
4.
The design of a cell is described for shear thixotrometers allowing to measure the shear strength of powdered materials under compression loads of up to 1 MPa. 相似文献
5.
Marina O. Shibinskaya Nina A. Kutuzova Alexandr V. Mazepa Sergey A. Lyakhov Sergey A. Andronati Mykhayl Ju. Zubritsky Valerij F. Galat Janusz Lipkowski Victor Ch. Kravtsov 《Journal of heterocyclic chemistry》2012,49(3):678-682
A series of 6‐(3‐aminopropyl)‐6H‐indolo[2,3‐b]quinoxalines were synthesized with high yields by the reaction of 6‐(3‐chloropropyl)‐6H‐indolo[2,3‐b]quinoxaline and corresponding amines in presence of tetrabutylammonium iodide in boiling toluene or dimethylformamide at room temperature. It was found that boiling of 6‐(3‐chloropropyl)‐6H‐indolo[2,3‐b]quinoxaline in acetone with sodium iodide or in acetic acid lead to intramolecular cyclization product. 相似文献
6.
V. V. Fimushkin A. D. Kovalenko L. V. Kutuzova Yu. V. Prokofichev A. S. Belov A. V. Turbabin V. N. Zubets 《Physics of Particles and Nuclei》2014,45(1):297-300
The project assumes the design and construction of a universal high-intensity source of polarized deuterons (protons) using a charge-exchange plasma ionizer. The output D +↑ (H +↑) current of the source is expected to be at a level of 10 mA. The polarization will be up to 90% of the maximal vector (±1) for D +↑ (H +↑) and tensor (+1, ?2) for D +↑ polarization. Realization of the project is carried out in close cooperation with INR of the RAS (Moscow). The equipment available from the CIPIOS ion source (IUCF, Bloomington, USA) is partially used for the Dubna setup. The new source at the JINR Nuclotron accelerator facility will make it possible to increase the polarized deuteron beam intensity up to the level of 1010 d/pulse. The first results of the source of polarized atoms testing are presented. 相似文献
7.
8.
H. Wang V. L. Stolyarova S. I. Lopatin M. E. Kutuzova S. Seetharaman 《Rapid communications in mass spectrometry : RCM》2010,24(16):2420-2430
A Knudsen effusion mass spectrometric method was used to study the vaporization processes and thermodynamic properties of pure V2O3 and 14 samples of vanadium‐containing slags in the CaO‐MgO‐Al2O3‐SiO2 system in the temperature range 1875–2625 K. The system was calibrated using gold in the liquid state as the standard. Vaporization was carried out from double tungsten effusion cells. First it was shown that, in vapor over V2O3 and the vanadium‐containing slags in the temperature range 1875–2100 K, the following vapor species were present: VO2, VO, O, WO3 and WO2, with the latter two species being formed as a result of interaction with the tungsten crucibles. The temperature dependencies of the partial pressures of these vapor species were obtained over V2O3 and the slags. The ion current comparison method was used for the determination of the V2O3 activities in slags as a function of temperature with solid V2O3 as a reference state. The V2O3 activity coefficients in the slags under investigation indicated positive deviations from ideality at 1900 K and a tendency to ideal behavior at 2100 K. It was shown that the V2O3 activity as a function of the slag basicity decreased at 1900 K and 2000 K and was practically constant in the slag melts at 2100 K. The results are expected to be valuable in the optimization of slag composition in high‐alloy steelmaking processes as well as for their environmental implications. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
9.
N. M. Zabivalova A. M. Bochek S. N. Kutuzova 《Russian Journal of Applied Chemistry》2008,81(6):1061-1064
Carboxymethyl cellulose ethers were prepared from flax fibers of various degrees of ripeness. The influence exerted by the degree of ripeness of flax fibers on their reactivity in carboxymethylation was examined. The rheological properties of aqueous solutions of the synthesized carboxymethyl cellulose were studied. 相似文献
10.
A. V. Bogdanov T. A. Kutuzova D. B. Krivolapov A. B. Dobrynin V. F. Mironov 《Russian Journal of General Chemistry》2016,86(3):539-543
Reactions of 1-chloroacetyloxindole and 1-chloroacetylisatin with some secondary amines, Girard’s reagent T and thiourea were studied. All investigated reactions proceeded via cleavage of the acyl group to form 3-substituted isatin or oxindole derivatives. 相似文献
1