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Endosymbiotic bacteria from donkeys milk in the inhibition of human pathogens

FOOD BIOSCIENCE 2023年第3期53卷 2867-2875页

作者： Saju, Athira Ali, Meerlan Mohamed Mehta, Riddhi Dey, Parry Osborne, w. Jabez Vellore Inst Technol Sch Bio Sci & Technol Dept Biosci Vellore 632014 Tamil Nadu India

Donkey milk is known for its beneficial aspects such as low fat and cholesterol, total protein and casein content, high lactose, whey protein, calcium, selenium and vitamin D3 content. It also has nutraceutical and utilitarian properties that can boost invulnerability, regulate digestion and conveniently change gut microbiota. The current study was focused on the effect of probiotic bacterial metabolites from donkey milk against human bacterial pathogens. The effective isolate VITRAAJ14 was found to be non-hemolytic and was tolerant to acid, NaCl and bile salt. Antibacterial activity by cross streak method showed maximum zone of inhibition. well diffusion method also exhibited effective inhibition against Escherichia coli (MTCC No. 9721), Staphylococcus aureus (MTCC No. 3160) and Salmonella enterica (MTCC No. 8587) with fractions obtained from chloroform: ethyl acetate. The metabolites capable of inhibiting pathogens were identified as oleyl alcohol by Gas chromatography-mass spectrometry (GCMS). Lead compounds detected in GCMS was studied for its functional group by Fourier transform infrared spectroscopy (FTIR), which revealed the presence of alcoholic stretch, carboxylic acid OH stretch, alkene and amide bond. The isolate VITRAAJ14 was identified to be the closest neighbour of Bacillus species (MH100985) by 16S rRNA gene sequencing. To our knowledge, current study is the first-time report on the presence of Bacillus sp. from donkey milk showing antibacterial activity due to its ability to produce oleyl alcohol. Scanning electron microscopic images revealed the presence of rod-shaped morphology of the effective bacterium VITRAAJ14.

关键词： Equus asinus Anti-bacterial Metabolite High throughput sequencing SEM

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广东省基层民警健康状况与健身锻炼现状调查研究--以广州市公安局黄埔区分局为例

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广州市公安管理干部学院学报 2022年第1期32卷 22-26,54页

作者：何佳烘王津李海珊广州市公安局黄埔区分局

运用文献资料法、问卷调查法等方法对广东省广州市黄埔区警察运动健身生活工作方式的现状进行调查研究,剖析并提出增强体质的建议。调查表明:黄埔区基层警察参加运动健身活动的主动性并不强,“体育人口”比例较低;在运动的内容及频率等... 详细信息

运用文献资料法、问卷调查法等方法对广东省广州市黄埔区警察运动健身生活工作方式的现状进行调查研究,剖析并提出增强体质的建议。调查表明:黄埔区基层警察参加运动健身活动的主动性并不强,“体育人口”比例较低;在运动的内容及频率等方面均在入警后出现弱化现象。

关键词：基层警察运动健身生活方式弱化

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Field report:Exploring the Doonerak fenster of the central Brooks Range,Alaska,USA

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Geoscience Frontiers 2017年第4期8卷 915-918页

作者： Justin V.Strauss Carl w.Hoiland Lyle L.Nelson Department of Earth Sciences Dartmouth College Department of Geological Sciences Stanford University Department of Earth and Planetary Sciences Harvard University

Arctic Alaska is a ＇suspect＇ terrane that encompasses approximately 20%of Alaska,stretching from the southern Brooks Range all the way to the continental shelves of the Chukchi and Beaufort *** the origin and subsequent travels of this large crustal fragment are debated among geologists,most researchers agree upon its composite nature and exotic *** constrain the early geological history of this terrane,we describe a recent expedition to the Doonerak fenster of the central Brooks *** area has long been regarded as a key locality for understanding the structural evolution of the Mesozoic-Cenozoic Brooks Range orogen;however,our target was different：a unique sequence of volcanic and siliciclastic rocks（Apoon assemblage） exposed beneath a profound pre-Mississippian unconformity,which we argue is of key importance to understanding the early Paleozoic tectonic history of northern Alaska and the greater Arctic.

关键词： Arctic Alaska Doonerak fenster Brooks Range Apoon assemblage

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Push and pull factors driving movement in a social mammal: context dependent behavioral plasticity at the landscape scale

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Current Zoology 2019年第5期65卷 517-525页

作者： Andrew w.BYRNE James O'KEEFFE Christina D.BUESCHIng Chris NEwMAN Agri-food and Biosciences Institute Veterinary Science DivisionStormontBelfastUK School of Biological Sciences Queen's University BelfastBelfastUK Centre for Veterinary Epidemiology and Risk Analysis(CVERA) School of Veterinary MedicineUniversity College DublinBelfieldDublinIreland Department of Agriculture Food and the MarineAgriculture HouseDublinIreland wildlife Conservation Research Unit Department of ZoologyUniversity of OxfordThe Recanati-Kaplan CentreTubney HouseAbingdon RoadTubneyAbingdonOxfordshireUK

Understanding how key parameters(e.g.,density,range-size,and configuration)can affect animal movement remains a major goal of population *** is particularly important for wildlife disease hosts,such as the European badger Meles meles,a reservoir of Mycobacterium *** we show how movements of 463 individuals among 223 inferred group territories across 755 km2 in Ireland were affected by sex,age,past-movement history,group composition,and group size index from 2009 to *** exhibited a greater probability of moving into groups with a male-biased composition,but male movements into groups were not associated with group *** badgers were,however,more likely to make visits into territories than *** that had immigrated into a territory previously were more likely to emigrate in the *** exhibiting such"itinerant"movement patterns were more likely to belong to younger age ***-territorial movement propensity was negatively associated with group size,indicating that larger groups were more stable and less attractive(or permeable)to *** the landscape,there was substantial variation in inferred territory-size and movement dynamics,which was related to group *** represents behavioral plasticity previously only reported at the scale of the species’biogeographical *** results highlight how a"one-size-fits-all"explanation of badger movement is likely to fail under varying ecological contexts and scales,with implications for bovine tuberculosis management.

关键词： dispersal socio-biology wildlife biology wildlife disease Meles meles social groups territoriality perturbation bTB

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QSAR Studies on the Toxicity of Nitrobenzenes to Population Growth of Tetrahymena Pyriformis

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Chemical Research in Chinese Universities 2002年第3期18卷 258-261页

作者： XU Jing-bo JIng Ti-song Pauli w. Berger S. Department of Environmental Science Northeast Normal UniversityChangchun 130024P.R.China College of Environment and Resource Jilin UniversityChangchun 130026P.R.China Institute of Biochemistry and Molecular Biology Free University of Berlin Ehrenbergstr26-2814195BerlinGermany

The IGC 50 (50% inhibitory growth concentration) values of 27 nitrobenzenes were determined for the population growth endpoint of Tetrahymena pyriformis . The toxicity order of the observed compounds was found to be as follows: dinitro compounds>mononitro compounds, dichloronitrobenzenes>monochloronitrobenzenes, meta substituted nitrobenzenes>ortho /para substituted nitrobenzenes(NT, NPh, NAnis) except for the dinitrobenzenes and nitroanilines(DNB, NAn). Quantitative structure activity relationships(QSARs) were developed with the logarithm of the reciprocal of IGC 50 [lg(IGC 50 ) -1 ] in mole liter as dependent variable and six molecular descriptors lg P , 1 X Ⅴ, I, 1K a, ∑σ - and E LUMO as independent variables. Via multiple regression analysis, one best equation was obtained: lg(IGC 50 ) -1 =3.029+0.860∑ σ -+0.341I n=27, r=0.924, r 2=0.854, s=0.265, f=70.44 , Pr> f =0.000 1  The equation was used to estimate IGC 50 for five analogues.

关键词： Tetrahymena pyriformis Nitrobenzene QSAR

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浅谈传统的农业技术向现代的农业技术的转变

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科技传播 2011年第11期3卷 59-59,56页

作者：刘佳丰邢念城克山农场第四管理区黑龙江齐齐哈尔161600 克山农场第二十四作业区黑龙江齐齐哈尔161600

我国农业已经步入新的发展阶段,想要促进中国农业产业结构调整,加快农业从单一的追求数量注重质量的转变,提高农产品的国际竞争力,加速农业现代化进程,中国必须依靠农业技术从传统化向现代化进行转变。本文通过分析中国农业技术的发展... 详细信息

我国农业已经步入新的发展阶段,想要促进中国农业产业结构调整,加快农业从单一的追求数量注重质量的转变,提高农产品的国际竞争力,加速农业现代化进程,中国必须依靠农业技术从传统化向现代化进行转变。本文通过分析中国农业技术的发展历程和特点,介绍中国农业技术的创新之路,进而提出传统农业技术向现代传统技术转变的策略。

关键词：传统农业技术现代农业技术转变

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An Efficient Second-Order Convergent Scheme for One-Side Space Fractional Diffusion Equations with Variable Coefficients

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Communications on Applied Mathematics and Computation 2020年第2期2卷 215-239页

作者： Xue-lei Lin Pin Lyu Michael Kng Hai-wei Sun Seakweng Vong Department of Mathematics Hong Kong Baptist UniversityHong KongChina School of Economic Mathematics Southwestern University of Finance and EconomicsChengdu 611130China Department of Mathematics The University of Hong KongHong KongChina Department of Mathematics University of MacaoMacaoChina

In this paper,a second-order fnite-diference scheme is investigated for time-dependent space fractional difusion equations with variable *** the presented scheme,the Crank-Nicolson temporal discretization and a second-order weighted-and-shifted Grünwald-Letnikov spatial discretization are ***,the unconditional stability and the second-order convergence in time and space of the proposed scheme are established under some conditions on the variable ***,a Toeplitz preconditioner is proposed for linear systems arising from the proposed *** condition number of the preconditioned matrix is proven to be bounded by a constant independent of the discretization step-sizes,so that the Krylov subspace solver for the preconditioned linear systems converges *** results are reported to show the convergence rate and the efciency of the proposed scheme.

关键词： One-side space fractional difusion equation Variable difusion coefcients Stability and convergence High-order fnite-diference scheme Preconditioner

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盾构隧道开挖对邻近桩基影响数值分析

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岩土工程学报 2008年第2期30卷 298-302页

作者：朱逢斌杨平 Ong C w 苏州科技学院土木工程学院江苏苏州215011 南京林业大学土木工程学院江苏南京210037 新加坡国立大学土木工程系新加坡119260

经与离心试验结果对比分析,验证了应用数值模拟研究盾构隧道开挖对邻近桩基影响是可靠的。通过采用Mohr-Coulomb弹塑性屈服准则,建立三维有限元数值模型,研究软土地区盾构隧道开挖对邻近桩基的影响规律。数值模拟结果表明,开挖导致群桩... 详细信息

经与离心试验结果对比分析,验证了应用数值模拟研究盾构隧道开挖对邻近桩基影响是可靠的。通过采用Mohr-Coulomb弹塑性屈服准则,建立三维有限元数值模型,研究软土地区盾构隧道开挖对邻近桩基的影响规律。数值模拟结果表明,开挖导致群桩中前排桩变形及内力均大于后排桩,且同排桩水平位移、弯矩和轴力沿桩身分布几乎重合;与同位置单桩相比,群桩中各桩水平位移稍大,而沉降则更小;前排桩最大弯矩与同位置单桩相差不大,而后排桩最大弯矩稍大于同位置单桩,前、后排桩最大轴力均大于同位置单桩。

关键词：盾构隧道桩基础数值分析水平位移沉降弯矩轴力

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Suppressor of Runnerless Encodes a DELLA Protein that Controls Runner Formation for A=sexual Reproduction in Strawberry

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Molecular Plant 2018年第1期11卷 230-233页

作者： Julie C. Caruana John w. Sittmann wanpeng wang Zhongchi Liu Department of Cell Biology and Molecular Genetics University of Maryland College Park MD 20742 USA

Dear Editor, Strawberry is an economically important fruit crop contributing to human nutrition and agricultural output. The commercial success of this fruit crop is due in part to its asexual propagation through runn...

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Pandemic spotlight on urban water quality

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Ecological Processes 2020年第1期9卷 249-251页

作者： Dennis w.Hallema François-Nicolas Robinne Steven G.McNulty Department of Forestry and Environmental Resources North Carolina State University3041 East Cornwallis RoadResearch Triangle ParkNC 27709USA Canadian Partnership for wildland Fire Science Department of Renewable ResourcesUniversity of Alberta751 General Services BuildingEdmontonAB T6G 2H1Canada Eastern Forest Environmental Threat Assessment Center Southern Research StationU.S.Department of Agriculture Forest ServiceResearch Triangle ParkNC 27709USA.

Surface water improvements associated with the COVID-19 economic slowdown illustrate environmental resiliency and societal control over urban water quality.

关键词： urban quality. water

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