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Boriskin A. I. Eremenko V. M. Pavlenko P. A. Skripchenko A. N. Khomenko S. N. 《Technical Physics》2004,49(6):770-774
A REMMA 102 scanning electron microscope equipped with semiconductor and wave spectrometers is applied to measure the copper
and zinc concentrations in the surface layers of an M161 brass sample and the same sample subjected to a focused laser radiation.
The results are compared with the results obtained with an MS3101 laser mass spectrometer having a laser-plasma ion source.
The laser-assisted erosion of the surface layer in the brass is shown to significantly change the copper and zinc concentrations.
It is found that, when the craters produced by laser pulses on the initial surface do not overlap, the copper and zinc contents
in the laser-induced plasma correspond to their contents in the sample. 相似文献
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Rychkov V. N. Smirnov A. L. Skripchenko S. Yu. Pastukhov A. M. Poponin N. A. 《Journal of Radioanalytical and Nuclear Chemistry》2017,311(3):1741-1749
Journal of Radioanalytical and Nuclear Chemistry - In the present paper the development and application of a novel somatostatin radioimmunoassay are described. 125I-labeling of... 相似文献
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O. N. Ivanov E. A. Skripchenko I. P. Raevskii S. P. Kubrin 《Bulletin of the Russian Academy of Sciences: Physics》2007,71(10):1392-1394
Peculiarities in the behavior of the dielectric, elastic, and anelastic properties of the PbFe1/2Nb1/2O3 ceramic ferroelectromagnet have been found and investigated near the antiferromagnetic phase transition (Néel temperature T N = 160 K). It is established that the transition to the antiferromagnetic phase leads to a decrease in the permittivity and elastic compliance. The anomaly of permittivity found near T N indicates the presence of magnetoelectric interaction in the magnetically ordered phase. 相似文献
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Alexandra Skripchenko 《Annals of Global Analysis and Geometry》2013,43(3):253-271
In the present paper we construct a ${\mathbb{Z}^3}$ -periodic surface in ${\mathbb{R}^3}$ whose almost all plane sections of a certain direction consist of exactly one connected component. This question originates from a problem of Novikov on the semiclassical motion of an electron in strong magnetic field. Our main tool is the Rips machine algorithm for band complexes. 相似文献
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A. I. Boriskin V. M. Eremenko P. A. Pavlenko A. N. Skripchenko S. N. Khomenko 《Technical Physics》2006,51(6):814-817
SEM data (obtained under a RÉMMA 102 microscope configured with an energy-dispersive analyzer) demonstrating the effect of surface erosion due to focused laser radiation on the elemental composition of the surface (eroded) layer are presented. 相似文献
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Mordyk S. N. Eremenko V. M. Bugai A. N. Sadovoi S. A. Skripchenko A. N. Storizhko V. E. Shelekhov A. V. 《Technical Physics》2017,62(5):807-809
Technical Physics - We consider the possibility of increasing the spatiotemporal length of an ion packet and reducing the fraction of multicharged ions in the mass spectrometer beam, which are... 相似文献
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Stephen J. Wagner rey Skripchenko Daniel Robinette James W. Foley Louis Cincotta 《Photochemistry and photobiology》1998,67(3):343-349
A series of four phenothiazine dyes, including methylene blue (MB), were previously tested for their ability to photoinactivate viruses in red cell suspensions. One of the dyes, 1,9-dimethyl-3-dimethylamino-7-dimethylaminophenothiazine (1,9-dimethylmethylene blue), exhibited good intracellular and extracellular virucidal activity for several RNA and DNA viruses under conditions that minimally affected red cell properties. In order to understand why the virucidal specificity of 1, 9-dhnethylmethylene blue was greater than other phenothiazines tested, the physical and chemical properties of the dye were compared to three other closely related analogues (MB, 1,9-dimethyl-3-diethylamino-7-dlbutylaminophenothiazine [compound 4-140], 1,9-dimethyl-3-dimethylamino-7-diethylaminophenothiazine [compound 6-136]). All compounds required light and oxygen for virucidal activity and had relatively high singlet oxygen yields (>0.5), but 1,9-dimethylmethylene blue had a singlet oxygen yield approximately 50% greater than that of MB. In addition, the hydrophobicity/hydophilicity of the compounds varied, with the partition coefficients (2-octanol : water) ranging from 0.11 for MB to 3560 for compound 4-140. The dyes had the following affinities for DNA: 1,9-dimethylmethylene blue > compound 6-136 > MB ~ compound 4-140. This order was similar to the order of activities for photoinactivation of the nonenveloped bacteriophage, R17, by the four compounds. Results with the most hydrophobic compound, 4-140, contrasted with those obtained with 1,9-dimethylmethylene blue. Compound 4-140 had a high affinity for protein and a low affinity for DNA. Although compound 4-140 and light inactivated the nonenveloped bacteriophage R17 poorly, the dye readily photoinactivated enveloped viruses in buffer. However, unlike results with 1,9-dimethylmethylene blue, viral inactivation of enveloped viruses by compound 4-140 was completely inhibited by the presence of red cells and plasma. Thus, the high affinity of 1,9-di-methyymethylene blue for DNA and the dye's efficient singlet oxygen yield suggest viral nucleic acid as a potential target, which could explain the photosensitizer's ability to inactivate viruses without adversely affecting anuclete red cells. 相似文献