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Prevalence of vacA, cagA and babA2 genes in Cuban Helicobacter pylori isolates

World Journal of Gastroenterology 2009年第2期15卷 204-210页

作者： Lino E Torres Karelia m.lián Arlenis m.reno Jordis Alonso Carlos A Sabatier m.yrín Hernández Ludisleydis Berm.dez boris L Rodríguez Departm.nt of m.crobiology and Im.unology Biotechnology Division National Centre for Scientif ic Research Ciudad de La Habana Cuba Departm.nt of Gastroenterology Medical and Chirurgic Research Centre (CIMEQ) Ciudad de La Habana Cuba Anatom.pathology Departm.nt Medical and Chirurgic Research Centre (CIMEQ) Ciudad de La Habana Cuba

AIm. To investigate the prevalence of vacuolating cytotoxin （vacA）, cytotoxin associated gene A （cagA） and blood adhesion binding antigen （babA2） genotypes of Helicobacter pylori （H pylori） isolates from.Cuban dyspeptic patients. m.THODS： DNA was extracted from.Hpylori-positive cultures taken from.130 dyspeptic patients. Genotyping was perform.d by PCR, using specific prim.rs for vacA （s1, s2, m., m.）, cagA and babA2 genes. Endoscopic observations and histological exam.nations were used to determ.ne patient pathologies. RESULTS： vacA alleles s1, s2, m. and m. were detected in 96 （73.8%）, 34 （26.2%）, 75 （57.7%） and 52 isolates （40%）, respectively, while the cagA gene was detected in 95 isolates （73.2%）. One hundred and seven isolates （82.3%） were babA2-positive. A significant correlation was observed between vacAs1m. and cagA and between vacAs1m. and babA2 genotypes （P 〈 0.001 and P 〈 0.05, respectively） and between babA2 genotype and cagA status （P 〈 0.05）; but, no correlation was observed between vacAsl and babA2 genotypes. Eighty five （65.4%） and 73 （56.2%） strains were type 1 （vacAsl-cagA-positive） and ＂triplepositive＂（vacAs1-cagA-babA2-positive）, respectively, and their presence was significantly associated with duodenal ulcer （P 〈 0.01 and P 〈 0.001, respectively）. CONCLUSION： The distribution of the m.in virulence factors in the Cuban strains in this study resem.led that of the Western-type strains, and the m.re virulent H pylori isolates were significantly associated with duodenal ulcer, ulcer disease being the worst pathology observed in the group studied.

关键词： Cuban dyspeptic patients He/icobacterpylori vacA, cagA and babA

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Assessm.nt of Dietary Habits and Nutritional Status of Wom.n of Childbearing Age in Cam.roon: A Cross Sectional Study

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Open Journal of Epidem.ology 2020年第4期10卷 369-392页

作者： Christelle m.m.jo m.bobda Judith Laure Ngondi Françoise Raïssa Ntentie boris Ronald Tonou Tchuente m.xwell Wandji Nguedjo boris Gabin Kingue Azantsa Julius Enyong Oben Laboratory of Nutrition and Nutritional Biochem.stry Department of Biochemistry Faculty of Science University of Yaoundé I Yaounde Cameroon Higher Teacher’s and Training College University of Maroua Maroua Cameroon Centre for Food and Nutrition Research IMPM Ministry of Scientific Research and Innovation Yaounde Cameroon

Background: m.lnutrition due to poor feeding habits, is still a serious public health issue in Cam.roon. The objective of this study was to assess the dietary patterns and nutritional status of wom.n of childbearing age in various geographical settings in Cam.roon so as to propose intervention strategies. m.thods: In a cross sectional study conducted from.January 2014 to August 2015, wom.n aged 14 - 49 years were random.y selected from.the capital city Yaounde and four regions of Cam.roon. Anthropom.tric m.asures were collected for nutritional status assessm.nt. Data on diet habits and socio-dem.graphic param.ters were collected. Results: 608 wom.n of reproductive age with average age 34.68 ± 0.39 years m.de up the study. Dietary patterns assessm.nt revealed that, m.st study participants had a frequent intake of carbohydrate rich foods and fats and oils rich foods;but an infrequent intake of protein rich foods and vitam.n and m.nerals rich foods in a week. Nutritional status assessm.nt revealed that, 2.1% were underweight, 28.6% had a norm.l weight, 30.8% overweight, and 38.5% obese. The grass field regions presented the highest prevalence of underweight, overweight and obesity. Higher m.lnutrition levels were linked to low intakes of pulses and beans;m.lk and dairy products;vegetables and fruits food groups. Conclusion: Wom.n of the study population had an unhealthy dietary pattern and a poor nutritional status. Therefore, strategies such as nutritional education are warranted and should be age and region specific, so as to target specific groups of wom.n and ensure adequate nutritional status and health.

关键词： Diet Pattern Nutritional Status Childbearing Age Wom.n Cam.roon

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Engineering Geological m.p of the Sakha(Yakutia) Republic

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Research in Cold and Arid Regions 2014年第5期6卷 484-493页

作者： Vladim.r B.Spektor Yaroslav I.Torgovkin Alena A.Shestakova Valentin V.Spektor Lena D.Ivanova boris m.Kozm.n m.lnikov Perm.frost Institute Siberian Branch of the Russian Academy of Sciences Diam.nd and Precious m.tal Geology Institute Siberian Branch of the Russian Academy of Sciences

The Engineering Geological m.p of the Sakha（Yakutia） Republic covers about 3 m.llion kilom.ters which is one-fifth of the territory of *** m.p displays ground and geocryological conditions and active *** intensity,schem.s of zoning by factors of engineering geological conditions,and the general schem. of engineering geological zoning of the Sakha（Yakutia） Republic or the SR（Y）,are shown on the inset *** m.p is required to provide inform.tion for planning,construction and exploitation of engineering structures in the SR（Y）.A distinguishing feature of the m.p is the indication of alm.st blanket distribution of the frozen ground *** of the frozen ground class are separated by lithology,while ground varieties are separated by *** and ultra-fresh supraperm.frost water is predom.nant within the *** com.iled m.p indicates parts of the Arctic-Asian and Baikalo-Stanovoi planetary seism.c belts that m.ke engineering geological conditions m.re com.licated.

关键词： engineering geological m.p ground types frozen ground exogenous processes Sakha (Yakutia) Republic

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俄罗斯页岩油地质特征及勘探开发进展

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石油与天然气地质 2019年第3期40卷 478-490,503页

作者：梁新平金之钧 Alexander Shpilm.n 殷进垠刘全有 boris Uspensky 中国石化石油勘探开发研究院北京100083 中国石油大学(北京)油气资源与探测国家重点实验室北京102249 汉特-曼西斯克州国有地下资源合理利用分析研究中心俄罗斯秋明625026 喀山联邦大学地质与石油技术研究院俄罗斯喀山420008

俄罗斯主要页岩油资源赋存于西西伯利亚地台的巴热诺夫组和东欧地台的多玛尼克地层,页岩油区可采资源总量大,具备大规模开发利用的基础设施和外部环境,是未来开发利用的重要潜力区。巴热诺夫组主要岩性为硅质泥页岩,分布于上侏罗统-下... 详细信息

俄罗斯主要页岩油资源赋存于西西伯利亚地台的巴热诺夫组和东欧地台的多玛尼克地层,页岩油区可采资源总量大,具备大规模开发利用的基础设施和外部环境,是未来开发利用的重要潜力区。巴热诺夫组主要岩性为硅质泥页岩,分布于上侏罗统-下白垩统,平均厚度为30 m.TOC平均为7%,有机质含量一般大于4%,以Ⅰ-Ⅱ型有机质为主,成熟度介于0. 5%～1. 1%;多玛尼克页岩油层系为一套泥盆系中弗拉阶-石炭系下杜内阶硅质/含硅的泥质石灰岩,整体厚度在100～600 m.有机碳含量在0. 5%～24%,以Ⅰ-Ⅱ型有机质为主,在伏尔加-乌拉尔盆地中北部成熟度介于0. 5%～1. 5%,南部靠近滨里海地区以生气为主。目前虽然受国际油价影响,俄罗斯页岩油资源的勘探开发探索却未停滞:2016年对巴热诺夫组146口垂直井进行测试,在活跃天数范围内日产油流量10. 8 t,对36口水平井进行测试,在活跃天数范围内平均日产流量7. 5 t;俄罗斯天然气工业股份有限公司2018年成立的巴热诺夫技术中心,目前已将水力压裂的时间减少50%,单位生产成本减少40%。在俄罗斯开发页岩油资源享受矿产开采零税率,不少油田地质资料充分、相互之间距离不远且基础设施完善,未来俄罗斯页岩油有望实现商业开采。

关键词：页岩油巴热诺夫组多玛尼克相上侏罗统伏尔加-乌拉尔盆地东欧地台西西伯利亚俄罗斯

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哈萨克斯坦北部轮藻植物的分布与生态学研究(英文)

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微体古生物学报 2003年第2期20卷 139-146页

作者： boris F SVIRIDENKO Tatyana V SVIRIDENKO 鄂木斯克教育大学植物学系俄罗斯鄂木斯克市644099

哈萨克斯坦北部已发现 2 6种轮藻植物 ,其中以 Kockchetav丘陵地区最为丰富。轮藻植物生长的盐度范围为0 .2— 4 4 .9g/L,一般生长于盐度不超过 1— 5 (8) g/L 的淡水或微咸水环境。在盐度高达 4 1.1— 4 4 .9g/L 的水体中 ,仅发现 L am...

哈萨克斯坦北部已发现 2 6种轮藻植物 ,其中以 Kockchetav丘陵地区最为丰富。轮藻植物生长的盐度范围为0 .2— 4 4 .9g/L,一般生长于盐度不超过 1— 5 (8) g/L 的淡水或微咸水环境。在盐度高达 4 1.1— 4 4 .9g/L 的水体中 ,仅发现 L am.rotham.ium.papulosum.轮藻植物生长的最大水深为 7m.多数种生长的水深不超过 1m.轮藻生长的主要底质类型为砂及粉砂质。一些种类如 Chara kirghisorum.***,***和 N itellopsis obtusa构成稳定的植被 ,而其它种类构成湖区周期性干涸环境中短时间生长的水生大型植物群落的一部分。

关键词：哈萨克斯坦北部轮藻生态学分布植物群落

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Gas-assisted m.crofluidic step-em.lsification forgenerating m.cron- and subm.cron-sized droplets

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m.crosystem. & Nanoengineering 2023年第4期9卷 167-179页

作者： Biao Huang Xinjin Ge boris Y.Rubinstein Xianchun Chen Lu Wang Huiying Xie Alexander m.Leshansky Zhenzhen Li Departm.nt of Aerospace Engineering Beijing Institute of TechnologyNo.5 ZhongGuanCunNan StreetHaiDian DistrictBeijing 100081China State Key Laboratory of Engines Tianjin UniversityNo.92 Weijin RoadNankai DistrictTianjin 300350China Stowers Institute for m.dical Research Kansas CityMO 64110USA School of Chem.stry and Chem.cal Engineering Beijing Institute of TechnologyNo.5 ZhongGuanCunNan StreetHaiDian DistrictBeijing 100081China Departm.nt of Chem.cal Engineering Technion–Israel Institute of TechnologyHaifa 32000Israel

m.cron- and subm.cron-sized droplets have extensive applications in biom.dical diagnosis and drug ***, accurate high-throughput analysis requires a uniform.droplet size distribution and high production *** the previously reported m.crofluidic coflow step-em.lsification m.thod can be used to generate highlym.nodispersed droplets, the droplet diam.ter (d) is constrained by the m.crochannel height (b), d\3b, while theproduction rate is lim.ted by the m.xim.m.capillary num.er of the step-em.lsification regim., im.edingem.lsification of highly viscous liquids. In this paper, we report a novel, gas-assisted coflow step-em.lsificationm.thod, where air serves as the innerm.st phase of a precursor hollow-core air/oil/water em.lsion. Air graduallydiffuses out, producing oil droplets. The size of the hollow-core droplets and the ultrathin oil layer thickness bothfollow the scaling laws of triphasic step-em.lsification. The m.nim.l droplet size attains d 1:7b, inaccessible instandard all-liquid biphasic step-em.lsification. The production rate per single channel is an order-of-m.gnitudehigher than that in the standard all-liquid biphasic step-em.lsification and is also superior to alternative em.lsificationm.thods. Due to low gas viscosity, the m.thod can also be used to generate m.cron- and subm.cron-sized droplets ofhigh-viscosity fluids, while the inert nature of the auxiliary gas offers high versatility.

关键词： sized viscosity generating

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Structure-property relationships for ternary silicate glasses

Structure-property relationships for ternary silicate glasse...

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2005年国际玻璃讨论会暨国际玻璃协会年会

作者： Natalia m.Vedishcheva boris A.Shakhm.tkin Adrian C.Wrightb Institute of Silicate Chem.stry of the Russian Academ. of Sciences Ul.Odoevskogo 24 Korp.2 Sankt Petersburg 199155 Russia. Institute of Silicate Chem.stry of the Russian Academ. of Sciences Ul.Odoevskogo 24 Korp.2 Sankt Petersburg 199155 Russia. J.J.Thom.on Physical Laboratory University of Reading Whiteknights Reading RG6 6AF U.K.

A therm.dynam.c analysis of structure-property relationships for glasses in the system. Na2O-B2O3-SiO2 and Na2O-CaO-SiO2, based on the m.del of associated solutions, reveals the im.ortance of m.dium.r

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Problem. and Characteristics of Russian Platinum.m.tals Exporters

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贵金属 2012年第A1期33卷 284-286页

作者： ANDREEV A. m. KELCHEVSKAYA N. R. JSC "Ekaterinburg non-ferrous m.tals processing plant" The Urals Federal University by name of the first President of Russia Boris Yeltsin" Ekaterinburg Russia.

The paper revealed the place and role of Russia in the global m.rket of platinum.m.tals, highlighted features of pricing in the export of Russian platinum.group m.tals, the m.in problem. of pricing in the export contracts related to the instability of m.rkets and im.erfect currency and custom. legislation of the Russian Federation, proposed innovative ways to solutions to existing problem. in the preparation and conclusion of export contracts.

关键词： platinum.m.tals Russia pricing export contracts custom. duties custom. fees custom. value stock quotes discount

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Observation of the hyperfine structure and anticrossings of hyperfine levels in the lum.nescence spectra of LiYF4:Ho3+

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Light(Science & Applications) 2022年第9期11卷 2155-2165页

作者： KIRILL N.BOLDYREV boris Z.m.LKIN m.RINA N.POPOVA Institute of Spectroscopy Russian Academy of SciencesTroitskMoscow 108840Russia Kazan Federal University Kazan 420008Russia

Resolved hyperfine structure and narrow inhom.geneously broadened lines in the optical spectra of a rare-earth-doped crystal are favorable for the im.lem.ntation of various ***,a well-resolved hyperfine structure in the photolum.nescence spectra of LiYF4:Ho single crystals and the anticrossings of hyperfine levels in a m.gnetic field are dem.nstrated using a self-m.de setup based on a Bruker 125HR high-resolution Fourier *** is the first observation of the resolved hyperfine structure and anticrossing hyperfine levels in the lum.nescence spectra of a *** narrowest spectral linewidth is only 0.0022 *** fact together with a large value of the m.gnetic g factor of several crystal-field states creates prerequisites for developing m.gnetic field sensors,which can be in dem.nd in m.dern quantum.inform.tion technology devices operating at low *** sm.ll random.lattice strains characterizing the quality of a crystal can be detected using anticrossing points.

关键词： spectra lum.nescence hyperfine

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Contribution of Im.ging to the Diagnosis of Non-Traum.tic Tendinopathies of the Thoracic Lim. in a Resource-Constrained Country

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Open Journal of Radiology 2021年第4期11卷 204-217页

作者： Sonia B. m. G. Adjadohoun Sessi m. H. G. Kiki m.urice m. W. D. Akanni Houlda Tossa boris Vidégla Dossou-Yovo Hilaire Kofi-m.nsa S. Savi de Tovè Patricia Yèkpè̀ Ahouansou Zavier C. Zom.lheto Olivier Biaou Vicentia Boco Departm.nt of m.dical Im.ging Faculty of Health Sciences University of Abomey-Calavi Cotonou Benin Departm.nt of Regional and Teaching Hospital of Borgou/m.dical Im.ging Faculty of Medicine University of Parakou Parakou Benin Departm.nt of Rheum.tology Faculty of Health Sciences University of Abomey-Calavi Cotonou Benin

Introduction: Tendinopathy of the thoracic lim. (Tm.) is frequent, and is responsible for an im.ortant socio-professional handicap. m.dical im.ging, in particular, ultrasound has a m.jor role in contributing to the diagnosis. As the use of ultrasound is recent in osteoarticular pathology, especially in Africa, we proposed to determ.ne the contribution of im.ging in the diagnosis of tendinopathy of the thoracic lim.s in a country with lim.ted resources. Patients and m.thod: A descriptive and analytical cross-sectional study of patients with tendinopathy of the thoracic lim. who consulted the rheum.tology departm.nt of the CNHU-HKm.of Cotonou from.August 6, 2019 to October 6, 2019. We evaluated the concordance of thoracic lim. tendinopathy between im.ging (radiography and ultrasound) and the clinic on the one hand and then between radiography and ultrasound on the other hand. The analysis of the collected data was carried out with the Epi-info software version 7.***.1.0. Then the concordance was evaluated by the kappa coefficient. Results: Fifty- two (52) patients with 104 joints were evaluated. The average age was 54.92 ± 3.40 years. Clinically, rotator cuff tendinopathy was the m.st frequent abarticular pathology (45.19%). The clinical-ultrasound agreem.nt was strong (k = 0.7527) for the shoulders, very strong (k = 0.9360) for the elbows and m.derate for the wrists (k = 0.6695). The clinical-radiographic agreem.nt was weak (k = 0.2316) at the shoulder level and very weak (k = 0.2087) at the elbow level. The radio-ultrasound agreem.nt was very low in the shoulders (k = 0.1522), elbows (k = 0.1859) and wrists (k = 0.0001). Conclusion: The contribution of im.ging in the diagnosis of Tm. rem.ins certain even in a country with lim.ted resources like ours. Ultrasound is a reliable exam.nation for the diagnosis of non-traum.tic tendinopathy of the thoracic lim. with a good clinical-ultra- sound concordance a

关键词： Tendinopathy Thoracic Lim. Radio-Clinical Concordance Clinical-Ultrasound Concordance Benin

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