排序方式: 共有74条查询结果,搜索用时 0 毫秒
71.
A. F. Aleksandrov G. É. Bugrov K. V. Vavilin I. F. Kerimova S. G. Kondranin E. A. Kral'kina V. B. Pavlov V. Yu. Plaksin A. A. Rukhadze 《Plasma Physics Reports》2004,30(5):398-412
A theory is developed that makes it possible to calculate RF power absorption in an inductive plasma source. Conditions are determined under which most of the power is deposited in the plasma. It is shown that these conditions correspond to the excitation of spatial waves (an oblique Langmuir wave and a helicon wave). A simple self-consistent model of a plasma source is proposed that describes all of the experimentally observed distinctive properties of plasma sources well. 相似文献
72.
A. É. Bugrov I. N. Burdonskii V. V. Gavrilov A. Yu. Gol’tsov O. L. Dedova E. V. Zhuzhukalo N. G. Koval’skii V. N. Kondrashov M. I. Pergament V. M. Petryakov I. K. Fasakhov G. M. Yankovskii 《Plasma Physics Reports》2004,30(2):143-148
New experimental data on the laser irradiation of low-density porous materials in the Mishen facility are presented and discussed. A wide set of optical and X-ray diagnostics was used to analyze the physical processes in porous media with different microstructures and specific densities of 1–30 mg/cm3 exposed to laser pulses with λ=1.054 µm, τ=3 ns, and I=1013–1014 W/cm2. The features of laser absorption and scattering and the processes of energy transfer in porous media were investigated for different average densities, thicknesses, and microstructures of the targets and different incidence angles of the laser beam. It was found that the material microstructure (chaotic or quasi-ordered) significantly affected the formation and dynamics of a plasma produced inside the irradiated samples that model the components of the advanced targets used in inertial confinement fusion research. 相似文献
73.
Industrial biotechnology employs the controlled use of microorganisms for the production of synthetic chemicals or simple
biomass that can further be used in a diverse array of applications that span the pharmaceutical, chemical and nutraceutical
industries. Recent advances in metagenomics and in the incorporation of entire biosynthetic pathways into Saccharomyces cerevisiae have greatly expanded both the fitness and the repertoire of biochemicals that can be synthesized from this popular microorganism.
Further, the availability of the S. cerevisiae entire genome sequence allows the application of systems biology approaches for improving its enormous biosynthetic potential.
In this review, we will describe some of the efforts on using S. cerevisiae as a cell factory for the biosynthesis of high-value natural products that belong to the families of isoprenoids, flavonoids
and long chain polyunsaturated fatty acids. As natural products are increasingly becoming the center of attention of the pharmaceutical
and nutraceutical industries, the use of S. cerevisiae for their production is only expected to expand in the future, further allowing the biosynthesis of novel molecular structures
with unique properties. 相似文献
74.
Experimental and theoretical studies of the physical processes occurring in thin plane targets irradiated by intense X-ray pulses 总被引:1,自引:0,他引:1
A. É. Bugrov I. N. Burdonskiĭ V. V. Gavrilov A. Yu. Gol’tsov E. V. Grabovskiĭ V. P. Efremov E. V. Zhuzhukalo M. V. Zurin N. G. Koval’skiĭ V. N. Kondrashov G. M. Oleĭnik A. I. Potapenko A. A. Samokhin V. P. Smirnov V. E. Fortov I. N. Frolov 《Plasma Physics Reports》2007,33(6):444-454
Results are presented from experimental and theoretical studies of the interaction of intense X-ray pulses with different types of plane targets, including low-density (~10 mg/cm3) ones, in the Angara-5-1 facility. It is found experimentally that a dense low-temperature plasma forms on the target surface before the arrival of the main heating X-ray pulse. It is demonstrated that the contrast of the X-ray pulse can be increased by placing a thin organic film between the target and the discharge gap. The expansion velocity of the plasma created on the target surface irradiated by Z-pinch-produced X rays was found to be (3–4) × 106 cm/s. A comparison between the simulation and experimental results confirms the validity of the physical-mathematical model used. 相似文献