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排序方式: 共有380条查询结果,搜索用时 46 毫秒
71.
Kharlamov A. I. Kirillova N. V. Kaverina S. N. 《Theoretical and Experimental Chemistry》2003,39(3):147-151
An original low-temperature method is proposed for the synthesis of boron carbide from simple materials. It made it possible to obtain a powdered product in the form of hollow and threadlike nanostructures. The boron carbide nanotubes are shorter than bundles of nanotubes. The boron carbide nanostructures are grown from vapor-phase reagents at a high-temperature nanocenter, the enhanced reactivity of which is maintained as a result of the exothermic effect of the reaction. 相似文献
72.
The real partE
ℝ of a real Enriques surfaceE admits a natural decomposition in two halves,E
ℝ=E
ℝ
(1)
∪E
ℝ
(2)
, each half being a union of components ofE
ℝ. We classify the triads (E
ℝ;E
ℝ
(1)
,E
ℝ
(2)
) up to homeomorphism. Most results extend to surfaces of more general nature than Enriques surfaces. We use and study in
details the properties of Kalinin's filtration in the homology of the fixed point set of an involution, which is a convenient
tool not widely known in topology of real algebraic varieties. 相似文献
73.
74.
Heterogeneous recombination rates of hydrogen atoms on solid surfaces were measured for the first time. An anomalous form
of these curves testifies that the reaction on surfaces of metals, semiconductors and dielectrics follows a universal mechanism
with participation of preadsorbed atoms. 相似文献
75.
Adamovich MI Aggarwal MM Alexandrov YA Andreeva NP Anzon ZV Arora R Avetyan FA Badyal SK Bhalla KB Bhasin A Bhatia VS Bogdanov VG Bubnov VI Burnett TH Cai X Chasnikov IY Chernova LP Chernyavsky MM Eligbaeva GZ Eremenko LE Gaitinov AS Ganssauge ER Garpman S Gerassimov SG Grote J Gulamov KG Gupta SK Gupta VK Heckman HH Huang H Jakobsson B Judek B Just L Kachroo S Kalyachkina GS Kanygina EK Karabova M Kaul GL Kitroo S Kharlamov SP Krasnov SA Kulikova S Kumar V Lal P Larionova VG Lepetan VN Liu LS 《Physical review letters》1992,69(5):745-748
76.
S. A. Krasnov T. N. Maksimkina G. J. Musulmanbekov F. Schussler A. Dirner L. Just M. Karabová A. Pavuková M. Tóthová S. Vokál J. Vrláková B. Jakobsson K. Soderstrom M. I. Adamovich M. M. Chernyavsky S. P. Kharlamov V. G. Larionova G. I. Orlova N. G. Peresadko N. A. Salmanova M. I. Tretyakova E. S. Basova S. Z. Nasyrov N. V. Petrov T. P. Trofimova U. I. Tuleeva B. P. Tursunov B. S. Yuldashev K. G. Gulamov V. S. Navotny I. D. Ohja B. K. Singh V. Singh S. K. Tuli 《Czechoslovak Journal of Physics》1996,46(6):531-540
Inelastic interactions induced by84Kr nuclei at 800–950 MeV/nucleon have been studied using a high angular resolution emulsion detector. Data on multiplicities of the produced particles, projectile and target fragments are shown. Comparisons with cascade calculations have been performed.We thank to Swedish Research Council for Natural Sciences for the financial support. Scanning and measurements performed by E.G. Broomé and V. Kopljar are acknowledged. 相似文献
77.
78.
The absence of experimental evidence for the occurrence of the catalytic reaction 2H2 + O2 → 2H2O on platinum in accordance with the Langmuir-Hinshelwood mechanism was established. It was found that the heterogeneous process can be described more adequately and its nature can be better understood with consideration for chemical transformations involving molecules in a precursor state in a model of the above reaction. The inverse kinetic problem was solved. It was found that the model in which an unambiguously specified set of rate constants for the elementary steps of the reaction was used provided an opportunity to describe experimental data obtained by various authors concerning the oxidation of hydrogen on platinum over the detonating gas pressure range 10?3-105 Pa. The signs of the occurrence of heterogeneous reactions by an adsorption mechanism were found. 相似文献
79.
Kharlamov A. I. Kirillova N. V. Karachevtseva L. A. Kharlamova A. A. 《Theoretical and Experimental Chemistry》2003,39(6):374-379
A new model is proposed for reactions between solids assuming formation of product in the gas phase (pores) due to the reaction of vaporizing reagents. Experimental results are given for the first time, which convincingly show that the reaction between solid-phase silicon and carbon below 1050 °C to give thread-like silicon carbide occurs due to rapidly vaporizing silicon and carbon atoms. 相似文献
80.
Timothy J. Garrett Maria C. Prieto-Conaway Viatcheslav Kovtoun Huy Bui Nick Izgarian George Stafford Richard A. Yost 《International journal of mass spectrometry》2007,260(2-3):166
We describe a new intermediate-pressure MALDI linear ion trap mass spectrometer and its capabilities for imaging mass spectrometry. The instrument design is described and is characterized in terms of four performance issues (1) MALDI performance at intermediate pressure; (2) analysis of samples on non-conductive and conductive glass slides; (3) critical importance of tandem mass spectrometry (both MS2 and MS3) for identification of analyte species and imaging of isobaric species; (4) capability for repeated analysis of the same tissue section. Application of the new instrument to imaging phospholipids in rat brain sections is described in detail. 相似文献