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排序方式: 共有237条查询结果,搜索用时 218 毫秒
71.
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T. M. Kozhan S. G. Kotov V. V. Kuznetsova I. I. Sergeev A. A. Stavrov V. S. Khomenko 《Journal of Applied Spectroscopy》1990,53(5):1130-1136
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 53, No. 5, pp. 726–733, November, 1990 相似文献
74.
The effect of manganese on the Curie point, elastic properties and magnetostriction of Fe-Ni invars was studied. It was established that manganese suppresses the invar anomaly of these alloys. Non-uniform distribution of manganese in the austenite spreads the ferromagnetic transformation.Translated from Izvestiya Vysshykh Uchebnykh Zavedenii, Fizika, No. 10, pp. 57–62 (1972). 相似文献
75.
T.?M.?KozhanEmail author V.?V.?Kuznetsova P.?P.?Pershukevich I.?I.?Sergeev V.?S.?Khomenko V.?A.?Chernyavskii 《Journal of Applied Spectroscopy》2004,71(6):829-836
The concentration dependence of the quantum yield of luminescence of Tm3+ ions in an oxychloride matrix has been measured in individual bands of their luminescence excited at different wavelengths. The concentration dependences of the quantum yield of luminescence were calculated with allowance for the effect of the unintentional impurity of rare-earth ions. The cross-relaxation nature of the concentration dependence of the rare-earth ion luminescence is discussed.Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 71, No. 6, pp. 759–765, November–December, 2004.This revised version was published online in April 2005 with a corrected cover date. 相似文献
76.
S. Yu. Gus’kov N. N. Demchenko K. N. Makarov S. G. Nishchuk T. A. Pikuz Yu. A. Satov I. Yu. Skobelev Yu. B. Smakovskii A. Ya. Faenov S. V. Khomenko B. Yu. Sharkov 《JETP Letters》2001,73(12):655-660
It was established experimentally that the number and energy of fast ions in laser plasma increased with increasing angle of focusing laser radiation onto a flat target. Numerical calculations showed that the increase in angle of focusing brought the mean angle of incidence of laser radiation closer to the optimal angle corresponding to the maximal efficiency of the resonance absorption mechanism and, as a result, increased the fraction of absorbed laser energy in the energy of fast electrons and increased the number of fast electrons. In turn, the increase in the energy and number of fast electrons resulted in an increase in the number of fast electrons involved in the formation of a self-consistent electric field at the target edge and led to the growth of the field strength, which, eventually, was the reason for the increase in the number and energy of fast ions. 相似文献
77.
K. N. Makarov S. G. Nishchuk V. K. Rerikh Yu. A. Satov I. Yu. Skobelev Yu. B. Smakovskii A. N. Starostin A. E. Stepanov T. A. Pikuz A. Ya. Faenov S. V. Khomenko 《JETP Letters》2000,72(1):7-10
The evolution of the ion composition of a laser plasma during its expansion over a large distance is studied. The plasma is produced by a TIR CO2 laser with a pulse energy up to 100 J and duration of ~20 ns. X-ray diagnostics with the use of a spectrograph and X-ray PIN diodes was applied to study the plasma near the target surface. At large distances from the target surface, time-of-flight neutral-particle diagnostics with the use of an electrostatic analyzer and ion collector was applied. Calculations performed with the GIDRA-1 code agree well with experimental data. 相似文献
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79.
Convenient Access to Fluorescent Probes by Chemoselective Acylation of Hydrazinopeptides: Application to the Synthesis of the First Far‐Red Ligand for Apelin Receptor Imaging 下载免费PDF全文
Dr. Jean‐François Margathe Dr. Xavier Iturrioz Pierre Regenass Iuliia A. Karpenko Dr. Nicolas Humbert Dr. Hugues de Rocquigny Prof. Marcel Hibert Dr. Catherine Llorens‐Cortes Dr. Dominique Bonnet 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(4):1399-1405
Herein, we develop a convenient method to facilitate the solution‐phase fluorescent labelling of peptides based on the chemoselective acylation of α‐hydrazinopeptides. This approach combines the advantages of using commercially available amine‐reactive dyes and very mild conditions, which are fully compatible with the chemical sensitivity of the dyes. The usefulness of this approach was demonstrated by the labelling of apelin‐13 peptide. Various fluorescent probes were readily synthesized, enabling the rapid optimization of their affinities for the apelin receptor. Thus, the first far‐red fluorescent ligand with sub‐nanomolar affinity for the apelin receptor was characterized and shown to track the receptor efficiently in living cells by fluorescence confocal microscopy. 相似文献
80.
Denys Naumenko Iuliia Naumenko Nora Grinceviciute Valentinas Snitka 《Journal of Raman spectroscopy : JRS》2015,46(1):94-99
In this work, a non‐covalent interaction of iron and metal‐free meso‐tetra (4‐sulfonatophenyl) porphines (FeTPPS and TPPS, respectively) with high‐quality single‐layer graphene is studied by Raman spectroscopy. Such a kind of graphene functionalization is promising for a development of novel optoelectronic devices and sensors. Our results show that the central metal atom of porphyrin macrocycle, iron particularly, plays an important role in the integrity of FeTPPS on graphene surface; however, the predicted Raman enhancement is not significant. The interaction of metal‐free TPPS with graphene leads to the deprotonation of TPPS molecules and higher Raman enhancement values. Moreover, initially deprotonated TPPS solutions after the adsorption onto the graphene surface demonstrate the appearance of new Raman bands and significantly enhanced Raman signals. We propose that a strong interaction between deprotonated TPPS and graphene is realized through pyrrole and desulfonated phenyl rings of closely located planar TPPS molecules on the graphene surface. The results show that both the protonation of porphyrin macrocycle and the existence of central metal atom are crucial for a formation of nanocomposites with defined electronic properties. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献