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Bioconvection in Casson nanofluid flow with Gyrotactic microorganisms and variable surface heat flux

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International Journal of Biomathematics 2019年第4期12卷 111-135页

作者： I.s.Oyelakin s.Mondal p.sibanda D.sibanda school of Mathematics Statistics and Computer Science University of KwaZulu-NatalPietermaritzburg Private Bag X01 Scottsville 3209 South Africa Department of Mathematics Amity University Kolkata New Town West Bengal 700135India school of Education University of KwaZulu-Natal Edgewood Private Bag X03 Pinetown 3605 South Africa

This paper presents a two-dimensional unsteady laminar boundary layer mixed convection flow heat and mass transfer along a vertical plate filled with Casson nanofluid located in a porous quiescent medium that contains both nanoparticles and gyrotactic microorganisms. This permeable vertical plate is assumed to be moving in the same direction as the free stream velocity. The flow is subject to a variable heat flux, a zero nanoparticle flux and a constant density of motile microorganisms on the surface. The free stream velocity is time-dependent resulting in a non-similar solution. The transport equations are solved using the bivariate spectral quasilinearization method. A grid independence test for the validity of the result is given. The significance of the inclusion of motile microorganisms to heat transfer processes is discussed. We show, inter alia, that introducing motile microorganisms into the flow reduces the skin friction coefficient and that the random motion of the nanoparticles improves the rate of transfer of the motile microorganisms.

关键词： Gyrotactic microorganisms bioconvection Casson nanofluid variable heat flux bivariate spectral quasilinearization method

Assessment of soil microbial and enzyme activity in the rhizosphere zone under different land use/cover of a semiarid region, India

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Ecological processes 2021年第1期10卷 225-236页

作者： Archana Meena K.s.Rao Department of Botany University of RajasthanJaipurRajasthan 302004India. Natural Resource Management Laboratory Department of BotanyUniversity of DelhiNorth CampusDelhi 110007India.

Background:Land use/cover and management practices are widely known to influence soil organic matter(sOM)quality and *** present study investigated the effect of different land use,i.e.,forests *** forest cover(MFC),prosopis juliflora(sw.)DC-dominated forest cover(pFC),and cultivated sites *** field(AF),vegetable field(VF),respectively,on soil parameter,microbial activity,and enzymes involved in soil nutrient cycle in a semiarid region of ***:The results showed a significant reduction(psoil carbon(sC),soil nitrogen(sN)content(~30–80%)and consequently the soil microbial biomass carbon(sMBC)(~70–80%),soil basal respiration(sBR),soil substrate-induced respiration(ssIR),and soil enzyme activities(β-glucosidase,acid phosphatase,and dehydrogenase)under cultivated sites in comparison with forest ***’s correlation showed that a positive correlation of sC with sMBC,sBR,ssIR(ps(i.e.,β-glucosidase,dehydrogenase)(pply the critical role of sC in regulating microbial and enzymatic ***,a positive correlation of soil moisture with urease activity(ps found suggesting it as a significant abiotic factor for soil biological ***,based on the pCA analysis,we observed the clustering of sMBC/sC ratio and qCO_(2) nearby ***:Our study suggests that soil microbial parameters(sMBC,sBR,ssIR,sMBC/sC,qCO_(2))and enzyme activity are key indicators of soil health and *** use/cover alters the sOM content and soil microbial *** management strategies focusing on the conservation of natural forest and minimizing the land disturbances will be effective in preventing soil carbon flux as CO_(2) and maintaining the sC stock.

关键词： Land use changes soil microbes soil enzymes semiarid ecosystems Land management practices

Botryosphaeria, Neofusicoccum, Neoscytalidium and pseudofusicoccum species associated with mango in Brazil

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Fungal Diversity 2013年第4期61卷 195-208页

作者： Marília W.Marques Nelson B.Lima Marcos A.de Morais Jr sami J.Michereff Alan J.L.phillips Marcos p.s.Câmara Departamento de Agronomia Universidade Federal Rural de Pernambuco52171-900 RecifeBrazil Departamento de Genética Universidade Federal de Pernambuco50732-970 RecifeBrazil Centro de Recursos Microbiológicos Departamento de Ciências da VidaFaculdade de Ciências e TecnologiaUniversidade Nova de Lisboa2829-516 CaparicaPortugal

Members of the Botryosphaeriaceae are well known fungi associated with dieback,canker and fruit rot on various hosts worldwide,including *** aim of this study was identify a large collection of Botryosphaeriaceae species associated with dieback and stem-end rot of mango in the semi-arid region of Northeastern Brazil,and compare the species in relation to mycelial growth,pathogenicity and virulence.A total of 115 isolates were sampled and based on morphology and DNA sequence data(ITs and EF1-α)seven taxa were identified,namely,Botryosphaeria dothidea,***,Fusicoccum fabicercianum,Neofusicoccum parvum,*** ***,Neoscytalidium dimidiatum and pseudofusicoccum *** and *** were the most commonly isolated species,which represented 37%and 33%of all isolates *** is reported for the first time in association with mango diseases *** were significant differences among the species obtained in this study in relation to optimum temperature for mycelial growth and mycelial growth *** species were pathogenic on mango *** were significant differences in virulence among the species,with *** and *** being the most virulent species,while *** was the least virulent.

关键词： Botryosphaeriaceae Dieback stem-end rot Mangifera indica pathogenicity Virulence phylogeny

Excited state Intramolecular and Intermolecular proton Transfer spectroscopy in UV-VIs Region for solution phase in Different Environment

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Excited State Intramolecular and Intermolecular Proton Trans...

一种新型CO_2置换CH_4水合物的开采方法

第三十五届国际光谱会议

作者： p.Chowdhury T.p.Adhikary s.Chakravorti Department of physics ＆ Material science Jaypee Institute of Information Technology University A-10Sector-62Noida-201307UPIndia Department of spectroscopy Indian Association for the Cultivation of science JadavpurKolkata 700032India Department of spectroscopy Indian Association for the Cultivation of science JadavpurKolkata 700032India

＜正＞Among different hydrogen bonds,the O-H…O and N-H…O bonds most often occur in liquid *** plays a crucial role in biological systems such as proteins and DNA base pairs and is essential for life *** all hydrogen bonded molecules there is a strong possibility of solute and solvent interaction when the solvent is polar in nature. There is a lot of studies deal with these interactions to explain their nature,strength and other features important for physical,chemical,and biological processes such as proton

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天然气工业 2016年第7期36卷 40-47页

作者： Khlebnikov V.N. Antonov s.V. Mishin A.s. Bakulin D.A. Khamidullina I.V. 梁萌 Vinokurov V.A. Gushchin p.A. 俄罗斯古勃金国立石油天然气大学

天然气水合物储量巨大,是未来极具开发潜力的清洁能源。CO_2置换法兼具能源开采与温室气体封存的双重功效,但通常CO_2对CH_4的置换速率非常低。为此,结合抑制剂存在条件下CH_4水合物和CO_2水合物具有不同的热力学稳定性这一特点,提出并... 详细信息

天然气水合物储量巨大,是未来极具开发潜力的清洁能源。CO_2置换法兼具能源开采与温室气体封存的双重功效,但通常CO_2对CH_4的置换速率非常低。为此,结合抑制剂存在条件下CH_4水合物和CO_2水合物具有不同的热力学稳定性这一特点,提出并通过实验证实了一种可用于开采天然气水合物的新方法,它将CO_2置换法与注热力学抑制剂的工艺相结合,实现了CH_4水合物分解过程的加速。通过岩心驱替实验,对比考察了两类3种常见CH_4水合物热力学抑制剂（甲醇、氯化钠和氯化镁）的作用效果。实验结果表明：在甲醇溶液作用下,CH_4水合物分解速率高达0.011 94 mol/h,远高于电解质盐溶液的作用效果（分别为0.000 86 mol/h和0.001 41 mol/h）。选择甲醇溶液作为水合物分解加速剂,通过前期注入甲醇溶液段塞、后期连续注入CO_2的方式,使得CH_4水合物分解率超过92%,且实现了CO_2气体以水合物形式的封存固定,最终CO_2水合物的生成量占到初始甲烷水合物总量的16%～27%。

关键词：甲烷水合物二氧化碳置换驱替热力学抑制剂水合物开采

Laparoscopic resection of primary retroperitoneal schwannoma:A case report

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World Journal of Clinical Cases 2020年第18期8卷 4114-4121页

作者： Marcelo AF Ribeiro Jr Yasmin GB Elias samara de s Augusto paola R Néder Cássia TK Costa Andressa D Maurício Adriano p sampaio Alexandre Z Fonseca General surgery and Trauma Department Catholic University of São Paulo–PUC-Sorocaba and Moriah HospitalSão Paulo 04083-002São Paulo CEPBrazil Department of surgery Medical SchoolSanto Amaro UniversitySão Paulo 04743-030São Paulo StateBrazil General surgery and Trauma Department Moriah HospitalSão Paulo 04083-002São Paulo StateBrazil

BACKGROUND schwannomas are rare,often benign,tumors deriving from schwann cells that have low incidence in the retroperitoneal region(0.5%to 5%).Their diagnosis is hardly confirmed at early stage due to lack of specific features in signs,symptoms and imaging ***,it is necessary performing guided punch biopsy in order to identify *** removal is the treatment of choice due to its low sensitivity to radiation and *** sUMMARY Forty-seven years old female patient who was hospitalized for elective orthopedic procedure,without complications,evolved with severe pain in the lower limbs,thigh and gluteal region associated with neurogenic *** pain required magnetic resonance imaging(MRI)of the lumbar spine,which showed epidural collection with dural compression and massive heterogeneous perihepatic nodular *** surgical team opted for draining the collection,as well as requested an MRI of the abdomen and pelvis,whose analysis showed expansive lesion in the retroperitoneum,in close contact with the inferior vena cava and with the right renal vein.A guided puncture was performed for diagnostic clarification,which showed immunohistochemical profile compatible with *** selected treatment comprised retroperitoneum tumor resection in association with laparoscopic *** patient was discharged and remained stable after 4-mo follow-up;she remains under followup to check the need of cancer *** schwannoma features requires surgical treatment based on laparoscopic resection,which often presents low relapse rates and optimistic prognosis.

关键词： Neurilemmoma Neoplasms Retroperitoneal space Laparoscopy Case report

微弧氧化处理对TiAl合金抗氧化性能的影响

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中国有色金属学报 1999年第A1期9卷 63-68页

作者：唐兆麟王福会 p.s.Gordienko s.V.GnedenkovandV s.Rudnev 中国科学院金属腐蚀与防护研究所金属腐蚀与防护国家重点实验室沈阳110015 俄罗斯科学院远东分院化学研究所

尝试了通过微弧氧化陶瓷化处理来提高ＴｉＡｌ合金的抗高温氧化性能。结果表明，通过微弧氧化处理能在ＴｉＡｌ合金表面形成具有不同成分的陶瓷层，但难以形成单一的Ａｌ２Ｏ３陶瓷层。在８５０ ℃的氧化实验表明，不同成分的陶... 详细信息

尝试了通过微弧氧化陶瓷化处理来提高ＴｉＡｌ合金的抗高温氧化性能。结果表明，通过微弧氧化处理能在ＴｉＡｌ合金表面形成具有不同成分的陶瓷层，但难以形成单一的Ａｌ２Ｏ３陶瓷层。在８５０ ℃的氧化实验表明，不同成分的陶瓷层对ＴｉＡｌ的抗氧化性能有不同的影响，有些陶瓷层在氧化过程中剥落，对ＴｉＡｌ的抗氧化性能无明显改善；另有一些陶瓷层与基体粘附性好，在氧化过程不剥落，能在一定程度上提高ＴｉＡｌ的抗氧化性能，但氧仍能通过陶瓷层向内扩散，在陶瓷层底下形成以Ａｌ２Ｏ３为主的ＴｉＯ２和Ａｌ２Ｏ３

关键词： TiAl合金高温氧化微弧氧化抗氧化性能

A study on Isolation and Antibiotic sensitivity Testing of pseudomonas aeruginosa Isolated from patients with Respiratory Tract Infection with special Reference to phenotypic and Genotypic Characterization of Extended spectrum Beta Lactamases (EsBL)

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Open Journal of Medical Microbiology 2016年第2期6卷 80-86页

作者： p. A. shiny s. Rajendran Y. Lakshmi sarayu Registar in Microbiology Public Health Laboratory Ministry of Health Kuwait City Kuwait Division of Microbiology Rajah Muthiah Medical College Annamalai University Chidambaram India

Backgrounds: pseudomonas aeruginosa is a classic opportunistic pathogen with innate resistance to many antibiotics and disinfectants. The lung is a main target for colonization and infection by the bacteria either in the context of a chronic, progressively deteriorating infectious and inflammatory pulmonary disease such as cystic fibrosis (CF) or in a more acute setting such as severe pneumonia in immunocompromised patients [1]. Aim and Objectives: To study the prevalence, virulence and the resistance pattern, phenotypic and genotypic characterization of p. aeruginosa from sputum samples. Materials and Methods: The present study was carried out with a total of 500 clinical sputum samples, which were received from patients, admitted to the various departments of Rajah Muthiah Medical College & Hospital, Annamalai University, Chidambaram. Result: Of the 500 samples subjected for isolation and identification of p. aeruginosa, 116 (23.20%) were positive. The isolated strains were tested for antibiotic sensitivity patterns. 93.10% of p. aeruginosa showed a maximum sensitivity to Ofloxacin, Norfloxacin and 86.20% of strains were highly resistant to Cefotaxime. The same isolates were also tested for phenotypic characterization of Extended spectrum of Beta Lactamases by double disc synergy method against Cefotaxime and Clavulanic acid, according to the criteria of Hi-Media [2]. Of the resistant strains of p. aeruginosa isolated from sputum, 59% were positive for EsBL. The genotype characterization of EsBL p. aeruginosa showed 40% of CTX-M and 46.66% sHV gene. Conclusion: The present study strongly recommends for further checking of the antibiotic resistant strains of p. aeruginosa for phenotypic characterization of EsBL for effective treatment.

关键词： pseudomonas aeruginosa prevalence in patient with Respiratory Tract Infection (RTI) socioeconomic status EsBL

Fate of enteric pathogens in different spinach cultivars cultivated in growth chamber and field systems

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Food Quality and safety 2018年第4期2卷 221-228页

作者： Marilyn C.Erickson Jye-Yin Liao Alison s.payton peter W.Cook Henk C.Den Bakker Jesus Bautista Juan Carlos Díaz pérez Department of Food science and Technology Center for Food SafetyUniversity of Georgia1109 Experiment St.GriffinGA 30223-1797USA and Department of Horticulture University of Georgia2360 Rainwater Rd.TiftonGA 31793-5766USA

between enteric pathogens and plant hosts have been shown to be *** series of studies sought to expand our knowledge in this area and evaluate whether spinach cultivar selection may be used to curtail pathogen contamination and ultimately reduce microbiological risk associated with this *** a component to that assessment,potential antimicrobials that were constituents within spinach leaves were first analysed and found to be spatially non-uniform,being more concentrated on the outer edges of the leaves than in the centre of the ***,the entire foliage of a plant was sampled in subsequent studies examining the fate of salmonella and Escherichia coli O157:H7 on seven cultivars of *** did not affect the degree of salmonella internalized into spinach tissue(p>0.05);however,it appeared that those salmonella that were internalized were transient residents as the percentage of plants containing this internalized pathogen dropped within 24 *** relationship existed between antimicrobial levels(total phenols or antioxidant capacity)of the spinach cultivars and the prevalence of plants exhibiting salmonella internalization or the persistence of salmonella or *** O157:H7 after the plants had been sprayed with the *** both growth chamber and field studies,salmonella was more resistant than *** O157:H7 to *** affected the persistence of both *** O157:H7 and salmonella but the ranking for each pathogen’s survival on three of those cultivars differed suggesting the difficulty in finding one cultivar that would be inhospitable to multiple pathogens.

关键词： spinach cultivars internalization survival phenols antioxidant capacity salmonella E.coli O157:H7.