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排序方式: 共有74条查询结果,搜索用时 546 毫秒
1.
Zh T A?tbaeva P N Deriabin B V Karal'nik K G Kaverina 《Zhurnal mikrobiologii, epidemiologii, i immunobiologii》1989,(5):16-20
Highly sensitive and specific erythrocyte diagnostic agents (ED) for the determination of antibodies to Proteus O-antigens have been obtained by the sensitization of formolated sheep red blood cells (SPBC) with activated lipopolysaccharides (LPS) without the use of mediators. The tannin treatment of formolated SRBC and/or the increase of temperature from 45 degrees C to 100 degrees C in the process of the preparation of ED have been found to produce no increase in effectiveness. Antibody ED permitting the detection of Proteus O- and H-antigens has been obtained by the sensitization of formolated chick red blood cells with immunoglobulin preparations to Proteus hydroxylamine antigens, carried out with the use of amidol. The experiments have shown the possibility of using this antibody ED for the determination of O-antibodies in the antigen neutralization test with nonactivated LPS used as an agglutinating agent. The passive hemagglutination test with antibody ED has proved to be a more sensitive method for the detection of O-antibodies than the antigen neutralization test with antigenic ED. The determination of Proteus etiology in the passive hemagglutination test with the use of antigenic ED has been shown to be highly effective in the examination of patients with chronic osteomyelitis at the stage of exacerbation. 相似文献
2.
P N Deriabin B V Karal'nik N P Vaneeva 《Zhurnal mikrobiologii, epidemiologii, i immunobiologii》1984,(8):47-52
Species-specific (Staphylococcus aureus and S. epidermidis) antigenic and antibody erythrocyte diagnosticums have been prepared. Various tests made with the use of these diagnosticums have demonstrated that the activity of specific antigens is higher in hydrochloric acid extracts than in trichloroacetic and phenolic ones; this activity is linked with undialyzed components and depends on the peculiar features of the strain. 相似文献
3.
Albert DG de Roos 《Biology direct》2007,2(1):7-17
Background
The timing of the origin of introns is of crucial importance for an understanding of early genome architecture. The Exon theory of genes proposed a role for introns in the formation of multi-exon proteins by exon shuffling and predicts the presence of conserved splice sites in ancient genes. In this study, large-scale analysis of potential conserved splice sites was performed using an intron-exon database (ExInt) derived from GenBank. 相似文献4.
R I Ataullakhanov R D Holms A V Katlinski? P G Deriabin A N Narovlianski? M V Mezentseva F I Ershov 《Antibiotiki i khimioterapii͡a》2002,47(8):9-11
Antiviral activity of immunomodulator "Hepon" was evaluated in human cells culture infected with hepatitis C virus. "Hepon" presence protected human cells SW-13 from cytopathogenic effect of hepatitis C virus. Maximum antiviral effect was demonstrated by "Hepon" at concentration 1 mcg/mL. Control antiviral agent reaferon (interferon alfa-2a) was more potent as vitality protecting agent in the case of SW-13 human cells culture. "Hepon" activity is based on changes of cytokins and interferons spectrum so this immunomodulator is expected to be effective against different viruses including herpes virus and encephalocarditis virus. 相似文献
5.
Mixed urogenital infection in men 总被引:1,自引:0,他引:1
Deriabin DG Borisov SD Mikhaĭlenko SV 《Zhurnal mikrobiologii, epidemiologii, i immunobiologii》2000,(2):103-105
High occurrence of sexually transmitted diseases (STD) caused by a combination of different infective agents was established. In 62.5% of cases such diseases took a course typical for mixed infections. Combinations of infective agents of STD were found to have several typical associations, e.g. Ureaplasma urealyticum and Mycoplasma hominis in combination with opportunistic microflora. The microbiocenosis of the reproductive tract was shown to form under the influence of a complex of endogenous (natural biological) and exogenous (sexual behavioral) factors leading, in each particular case, to the formation of stable associations. 相似文献
6.
A complex of biological characteristics important for design of the therapeutic and prophylactic activities of Bifidobacterium and Lactobacillus preparations made with the use of hydrolysate-milk and hydrolysate-soybean media was comparatively estimated. The use of the hydrolysate-soybean medium resulted in an increase of the antagonistic activity of the preparations against a number of opportunistic pathogens that was not connected with changing of their acidity and the content of lysozyme, a bacteriolytic enzyme in the culture fluid. The change in the cultivation conditions due to substitution of the hydrolysate-milk medium for the hydrolysate-soybean medium stimulated the adhesive capacity of the production strains used in the study, which was especially evident with respect to the representatives of the genus Bifidobacterium. 相似文献
7.
Michael Lauck Sergey V. Alkhovsky Yīmíng Bào Adam L. Bailey Zinaida V. Shevtsova Alexey M. Shchetinin Tatyana V. Vishnevskaya Matthew G. Lackemeyer Elena Postnikova Steven Mazur Jiro Wada Sheli R. Radoshitzky Thomas C. Friedrich Boris A. Lapin Petr G. Deriabin Peter B. Jahrling Tony L. Goldberg David H. O'Connor Jens H. Kuhn 《Journal of virology》2015,89(15):8082-8087
Simian hemorrhagic fever (SHF) is lethal for macaques. Based on clinical presentation and serological diagnosis, all reported SHF outbreaks were thought to be caused by different strains of the same virus, simian hemorrhagic fever virus (SHFV; Arteriviridae). Here we show that the SHF outbreaks in Sukhumi in 1964 and in Alamogordo in 1989 were caused not by SHFV but by two novel divergent arteriviruses. Our results indicate that multiple divergent simian arteriviruses can cause SHF. 相似文献
8.
The alkylhydroxybenzene (AHB) autoregulatory factors d1 (fd1) of microorganisms have been found to directly interact with highly polymeric DNA. This circumstance results in changes, related to alterations in the topology of this macromolecule, in DNA physicochemical properties. The physicochemical properties of DNA in the presence of chemical analogues of microbial AHBs (methylresorcinol; hexylresorcinol; and 2-(4-hydroxyphenyl)ethane-1-ol, also known as tyrosol) were investigated using adsorption spectrophotometry, fluorometry, heat denaturation, viscosimetry, and electrophoresis in agarose gel. A number of concordant effects pointing to DNA-AHB interactions were revealed that manifesed themselves in the hypochromic properties of the resulting complexes, an increase in their melting temperature and viscosity, a decrease in their electrophoretic mobility, and a change in the fluorescent properties of AHBs upon complexation with DNA. Such alterations were particularly significant in the presence of hexylresorcinol, which possessed the maximum alkyl radical length among the fd1 analogues tested. Using atomic force microscopy, we visualized the micelle-like DNA nanostructures forming in the presence of AHBs. The results obtained provided the basis for developing a hypothetical model of the interaction between the biopolymer macromolecule and low-molecular-weight AHBs that takes into account the differences in the hydrophobicity of individual AHB homologues functioning as ligands. In terms of our model, we discuss AHB involvement in the stabilization of DNA and alteration of its topology, i.e., in the process related to intragenomic rearrangements, which account for the intrapopulational variability of bacteria, including dissociation processes. 相似文献
9.
Conditions that influence the luminescence of natural and recombinant luminescent bacteria in the presence of blood serum were studied. In general, blood serum quenched the luminescence of the marine Photobacterium phosphoreum and the recombinant Escherichia coli strains harboring the luminescent system genes of Photobacterium leiognathi, but enhanced the luminescence of the soil bacterium Photorhabdus luminescens Zm1 and the recombinant E. coli strain harboring the lux operon of P. luminescens Zm1. The quenching effect of blood serum increased with its concentration and the time and temperature of incubation. The components of blood serum that determine the degree and specificity of its action on bacterial luminescence were identified. 相似文献
10.
Sergey M Zuev Stephen F Kingsmore Damian DG Gessler 《Theoretical biology & medical modelling》2006,3(1):8-15