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| 1 | Potential antibacterial activity of berberine against multi drug resistant enterovirulent Escherichia coli isolated from yaks(Poephagus grunniens) with haemorrhagic diarrhoea显示文摘Objective:To evaluate the antimicrobial efficacy of berberine,a plant alkaloid.Methods:Five multi-drug resistant(MDR) STEC/EPEC and five MDR ETEC isolates from yaks with haemorrhagic diarrhoea were selected for the study.Antibacterial activity of berberine was evaluated by broth dilution and disc diffusion methods.The binding kinetics of berberine to DNA and protein was also enumerated.Results:For both categories of enterovirulent Escherichia coli(E.roli) isolates, berberine displayed the antibaclerial effect in a dose dependent manner.The MIC50 of berberine chloride for STEC/EPEC isolates varied from 2.07μM to 3.6μM with a mean of(2.95±0.33)μM where as for ETEC strains it varied from 1.75 to 1.96μM with a mean of(1.87±0.03)μM. Berberine bind more tightly with double helix DNA with Bmax and Kd of(24.68±2.62) and(357.8±57.8),respectively.Berberine reacted with protein in comparatively loose manner with Bmax and Kd of(18.9±3.83) and <286.2±113.6),respectively.Conclusions:The results indicate clearly that berberine may serve as a good antibacterial against multi drug resistant E.coli. | Samiran Bandyopadhyay Pabitra H Patra Achintya Mahanti Dipak K Mondal Premanshu Dandapat Subhasis Bandyopadhyay Indranil Samanta Chandan Lodh Asit K Bera Debasish Bhattacharyya Mihir Sarkar Kishore K Baruah | 2013 | Asian Pacific Journal of Tropical Medicine2013，6，4： | 11 |
| 2 | Enhanced oil recovery by nonionic surfactants considering micellization, surface, and foaming properties显示文摘Surfactants for enhanced oil recovery are important to study due to their special characteristics like foam generation,lowering interfacial tension between oleic and aqueous phases,and wettability alteration of reservoir rock surfaces.Foam is a good mobility control agent in enhanced oil recovery for improving the mobility ratio.In the present work,the foaming behavior of three nonionic ethoxylated surfactants,namely Tergitol 15-S-7,Tergitol 15-S-9,and Tergitol 15-S-12,was studied experimentally.Among the surfactants,Tergitol 15-S-12 shows the highest foamability.The effect of Na Cl concentration and synthetic seawater on foaming behavior of the surfactants was investigated by the test-tube shaking method.The critical micelle concentrations of aqueous solutions of the different nonionic surfactants were measured at 300 K.It was found that the critical micelle concentrations of all surfactants also increased with increasing ethylene oxide number.Dynamic light scattering experiments were performed to investigate the micelle sizes of the surfactants at their respective critical micelle concentrations.Core flooding experiments were carried out in sand packs using the surfactant solutions.It was found tha t22% additional oil was recovered in the case of all the surfactants over secondary water flooding.Tergitol 15-S-12exhibited the maximum additional oil recovery which is more than 26%after water injection. | Achinta Bera Ajay Mandal Hadi Belhaj Tarkeswar Kumar | 2017 | Petroleum Science2017，14，2： | 8 |
| 3 | Influence of cobalt on performance of Cu-CeO2 catalysts for preferential oxidation of CO显示文摘Copper and cobalt oxides supported on CeO2 were investigated for preferential oxidation of carbon monoxide(CO-PROX)in the presence of excess hydrogen and CO2.(Cuo)1-x(Co3 O4)x/3-(CeO2)2.5(x=0,0.25,0.50,0.75,0.85 and 1)catalysts were prepared by coprecipitation method.These mixed oxide catalysts were characterized by several physicochemical techniques,such as BET surface area(SBET),X-ray diffraction(XRD),high resolution transmission electron microscopy(HRTEM),temperature programmed reduction(TPR)and X-ray photoelectron spectroscopy(XPS).XRD studies show the peaks related to CuO and Co3 O4 phases in copper and cobalt containing CeO2 catalysts.The average particle size of the CeO2 crystallites is in the range of 8-10 nm as evaluated from HRTEM studies.XPS studies demonstrate that Cu,Co and Ce in(cuO)1-x(Co3O4)x/3-(CeO2)2.5 catalysts are presented in+2 and+1,+3 and+2 and+4 and+3 oxidation states,respectively.The catalyst with x=0.75 shows better activity and selectivity towards CO-PROX.Though the catalyst with only copper(CuO-CeO2,x=0)shows good activity but reverse water gas shift(RWGS)reaction is noticed at high temperature.On the other hand,RWGS reaction is suppressed on the cobalt containing CuO-ceO2 catalyst.Cobalt on CeO2 with x=1 shows hardly any activity for PRoX reaction at low temperatures.No methanation activity is observed on CuO-CeO2 or Co3O4-CeO2 catalysts.In contrast,combination of copper and cobalt on CeO2 shows methanation of CO where enhanced activity is observed with increasing in cobalt content. | Sachin Malwadkar Parthasarathi Bera C.V.V.Satyanarayana | 2020 | Journal of Rare Earths2020，38，9： | 7 |
| 4 | Molecular basis for identification of species/isolates of gastrointestinal nematode parasites显示文摘Gastrointestinal(GI) parasitism is the most serious constraint throughout the world in small ruminants which causes significant production loss in animals.GI parasites are major contributor to reduce productivity in terms of meat,milk and wool in animals.Control of GI parasite is done primarily by anthelmintic treatment where choice and schedule of treatment is done after identification and quantitation of individual parasite.Identification of GI parasites is done through microscopic method by identifying specific morphological characteristics of egg and larva(L3).Since most of parasite eggs are having similar morphological characteristics, identification up to species level through microscopy is not possible in most of cases.To address this issue,molecular techniques are the viable alternative for identification of species as well as molecular level differences within a species(isolates) of parasites.Different DNA based molecular techniques viz.PCR,AFLP,RAPD,RFLP,PCR-SSCP,real time PCR,DNA microarray etc.have been used for identification and to assess the genetic diversity among parasite population.For identification of species,the characteristic sequence of genomic DNA of different species should differ to allow the delineation of species,but at the same time,no/minor variation within the species should exist.In contrast,for purpose of identifying population variants(strains/isolates), a considerable degree of variation in the sequence should exist within a species.Various target regions,including nuclear ribosomal DNA(rDNA),mitochondrial DNA(mtDNA) or repetitive DNA elements(microsatellite loci),which show considerable variation in the number of repeats within individuals have been employed to achieve the identification of parasites species or strain. | Ahmed M Singh MN Bera AK Bandyopadhyay S Bhattacharya D | 2011 | Asian Pacific Journal of Tropical Medicine2011，4，8： | 6 |
| 5 | A comparative study of mangrove floras in China and India显示文摘Species compositions in the mangrove habitats of China and India, especially on Hainan Island (China) and on the Sundarbans and the Andaman & Nicobar Islands (India), are of interest, showing several similarities and differences. The total mangrove areas of India cover about 6419 km 2 with 43 species (23 major and 20 minor species), while the mangrove areas of China cover about 150 km 2 with 26 speices (19 major and 7 minor speices). We carried out a comparison of mangrove floras in the Indian Sundarbans, Andaman & Nicobar Islands and in Hainan Island. The mangrove areas of the Indian Sundarbans comprise about 66.5% of the total Indian mangroves, presently covering an area of 4267 km 2 with 35 species from 22 genera and 16 families. There are 34 species from 17 genera and 13 families in the Andaman & Nicobar Islands. Hainan Island is considered a distribution center of mangroves; it has the largest number of mangrove species in China, i.e., 25 species from 15 genera and 12 families, accounting for about 96% of the total number of mangrove species in China. The mangroves of Hainan Island and the Andaman & Nicobar Islands belong to island types, while those of Sundarbans belong to inter-tidal deltaic types. Differences in soil type, rainfall, temperature, tidal fluctuation and other climatic features possibly cause variations in floristic composition of these regions. | YAO Yi-feng Subir BERA Kumudranlan NASKAR LIAO Wen-bo LI Cheng-sen | 2011 | Forestry Studies in China2011，13，3： | 4 |
| 6 | First fossil evidence of Palaeocarya(Engelhardioideae:Juglandaceae)from India and its biogeographical implications显示文摘Even though presently indigenous to eastern Himalaya in India,no Engelhardioideae have been reported from the Cenozoic sediments of India till date.Here,we report the first Indian occurrence of a characteristic engelhardioid winged samaroid fruit having a tri-lobed wing(oblong-ovate median lobe and two lateral lobes)and a globose nut from the latest Neogene(Pliocene:Rajdanda Formation)sediments of Chotanagpur Plateau,eastern India.This is the first fossil evidence of relict family Juglandaceae from the Indian Cenozoic.We determine its taxonomic position on the basis of detailed macromorphological comparison with similar extant and fossil specimens and discuss its palaeoclimatic significance in terms of the present-day distribution of modern analogous species.We assign this Pliocene winged fruit specimen to the morphogenus Palaeocarya sect.Monocosta Manchester and describe it as a new species,namely Palaeocarya indica Hazra,Hazra M&Khan sp.nov.Palaeocarya sect.Monocosta has rich fossil records from the Cenozoic sediments of Europe,North America,and eastern Asia(China,Korea),but the modern analog,Engelhardia,is presently native only to India and neighboring Southeast Asia.We discuss the possible causes of disappearance of Engelhardia from the present-day vegetation of Chotanagpur Plateau.Its disappearance may be related to the gradual intensification of monsoonal rainfall seasonality since the Pliocene.Here,we also review in detail the biogeographic history of Palaeocarya sect.Monocosta and suggest its possible migration routes. | Taposhi Hazra Manoshi Hazra Sanchita Kumar Sumana Mahato Meghma Bera Subir Bera Mahasin Ali Khan | 2021 | Journal of Systematics and Evolution2021，59，6： | 3 |
| 7 | Soral Crypsis:Protective Mimicry of a Coccid on an Indian Fern显示文摘Herbivory with crypsis is not well documented in ferns. The present record of cryptic coloration of coccid Saissetia filicum Boisduval (Homoptera: Coccidae) to the sori of a fern species Asplenium nidus L. (Aspleniaceae) is unique. Predatory beetles (Jauravia sp., Coleoptera: Coccinellidae) that feed on the coccids, are suggested to be selective pressure for the development of the present homopteran soral crypsis. A higher rate of effective predation is noticed in the vegetative leaves than the fertile leaves. Aggressive ants were found harvesting honeydew secretions from the coccids and defending the trophobionts as well as the host fern from their natural enemies. In addition, a possible three-way mutualistic relationship among the coccids, its host fern and the tending ant is suggested. Differential numbers of coccids on vegetative and fertile leaves is correlated with their phenol content and degree of predation by beetles. Such coloration mimicry by the coccids may enable them to obtain the necessary blend of sorus of the host fern needed to evade beetle detection and attack. | Biplab Patra Subir Bera R. James Hickey | 2008 | Journal of Integrative Plant Biology2008，50，6： | 2 |
| 8 | Murine double minute 2, a potential p53-independent regulator of liver cancer metastasis显示文摘Hepatocellular carcinoma(HCC)has emerged as one of the most commonly diagnosed forms of human cancer;yet,the mechanisms underlying HCC progression remain unclear.Unlike other cancers,systematic chemotherapy is not effective for HCC patients,while surgical resection and liver transplantation are the most viable treatment options.Thus,identifying factors or pathways that suppress HCC progression would be crucial for advancing treatment strategies for HCC.The murine double minute 2(MDM2)-p53 pathway is impaired in most of the cancer types,including HCC,and MDM2 is overexpressed in approximately 30%of HCC.Overexpression of MDM2 is reported to be well correlated with metastasis,drug resistance,and poor prognosis of multiple cancer types,including HCC.Importantly,these correlations are observed even when p53 is mutated.Indeed,p53-independent functions of overexpressed MDM2 in cancer progression have been suitably demonstrated.In this review article,we summarize potential effectors of MDM2 that promote or suppress cancer metastasis and specifically discuss the p53-independent roles of MDM2 in liver cancer metastasis from clinical as well as biological perspectives. | Atul Ranjan Kaustav Bera Tomoo Iwakuma | 2016 | Hepatoma Research2016，2，1： | 2 |
| 9 | Native mitochondrial creatine kinase forms octameric structures显示文摘 | Jorg S Bera Z | 1988 | Biol Chem1988，263，16： | 2 |
| 10 | Simple diagnostic tests for spatial dependence显示文摘 | Luc Anselin Anil K. Bera Raymond Florax Mann J. Yoon | 1996 | Regional Science and Urban Economics1996，，1： | 2 |
| 11 | Nectar and Pollen Sources for Honeybee (Apis cerana cerana Fabr.) in Qinglan Mangrove Area, Hainan Island, China显示文摘在现在的学习,为蜜蜂(Apis cerana cerana Fabr ) 的花蜜和花粉来源在 Qinglan 红树属植物区域被学习,海南岛,中国,基于蜂蜜和花粉的显微镜的分析,从蜜蜂的负担(corbicular 和内脏内容) 在 10 月和 2004 年 11 月收集了。生来的蜂蜜样品的质、量的 melittopalynological 分析证明蜂蜜具有有含羞草属植物 pudica L 的 unifloral 类型。(Mimosaceae ) 作为占优势(89.14%) 为 A 花蜜和花粉采购原料。在 10 月的 cerana cerana。Araceae 的成员是一种重要未成年者(3%-15%) 花粉类型,而 Arecaceae 的那些是一个未成年者(<3%) 花粉类型。Nypa fruticans Wurmb, Rhizophora spp, Excoecaria agallocha L. , Lumnitzera spp, Bruguiera spp, Kandelia candel Druce,和 Ceriops tagal (Perr )C.B. 罗伯的花粉谷物。在在在蜂蜜作为次要的 taxa 记录的 Qinglan 红树属植物区域成长的著名红树属植物 taxa 之中。绝对花粉计数(即花粉 grains/10 g 蜂蜜样品的数字) 建议蜂蜜属于组 V (> 1 000 000 ) 。从 corbicular 和 A 的内脏内容的花粉分析。cerana cerana 揭示了 Sonneratia spp 的成员的最高级的表示(95.60%) 。(Sonneratiaceae ) ,由 Bruguiera spp 列在后面。(Rhizophoraceae ) , Euphorbiaceae, Poaceae, Fabaceae, Arecaceae, Araceae, Anacardiaceae,和 Rubiaceae。这些植物,属于 Sonneratia 植物的那些是为 A 的最重要的花蜜和花粉来源。cerana cerana 并且经常是 foraged 并且在 11 月由这些蜜蜂传花粉给。 | Yi-Feng Yao Subir Bera Yu-Fei Wang Cheng-Sen Li | 2006 | Journal of Integrative Plant Biology2006，48，11： | 2 |
| 12 | Modeling of flow of oil-in-water emulsions through porous media显示文摘Formation and flow of emulsions in porous media are common in all enhanced oil recovery techniques.In most cases,oil-in-water(O/W) emulsions are formed in porous media due to oil-water interaction.Even now,detailed flow mechanisms of emulsions through porous media are not well understood.In this study,variation of rate of flow of O/W emulsions with pressure drop was studied experimentally,and rheological parameters were calculated.The pressure drop increases with an increase in oil concentration in the O/W emulsion due to high viscosity.The effective viscosity of the emulsion was calculated from the derived model and expressed as a function of shear rate while flowing through porous media.Flow of O/W emulsions of different concentrations was evaluated in sand packs of different sand sizes.Emulsions were characterized by analyzing their stability,rheological properties,and temperature effects on rheological properties. | Ajay Mandal Achinta Bera | 2015 | Petroleum Science2015，12，2： | 2 |
| 13 | Variation and dispersal of PM_(10) and PM_(2.5) during COVID-19 lockdown over Kolkata metropolitan city,India investigated through HYSPLIT model显示文摘The higher concentration of PM_(10) and PM_(2.5) in the lower atmosphere is severely harmful for human health and it also makes visibility diminution along with weather and climate modifications.The main objective is to find out the spatiotemporal variation and dispersal of PM_(10) and PM_(2.5) along with COVID-19 infection in the dusty city Kolkata.The consecutive two years PM_(10) and PM_(2.5) data of different stations have been obtained from State Pollution Control Board,Govt.of West Bengal.Forward trajectory analysis has been done through HYSPLIT(Hybrid Single Particle Lagrangian Integrated Trajectory)model to find the path and direction of air particles.The result showed that the various meteorological or environmental factors(such as temperature,relative humidity,wind,wind speed,pressure and gusty wind)and geographical location regulate the spatiotemporal variation of PM_(10) and PM_(2.5).These factors like high temperature with relative humidity and strong wind influence to disperse the particulate matters from north to south direction from city to outside during summer in Kolkata metropolitan city.During summer(both pre and lockdown years),the height of particles is extended up to 1000 m owing to active atmospheric ventilation whereas in winter it is confined within 100 m.The HYSPLIT model clearly specified that the particles dispersed from south,south-west to north and north east direction due to strong wind.The constant magnification of PM_(10) and PM_(2.5) in the lower atmosphere leads to greater frequency of COVID-19 infections and deaths.In Kolkata,the one of the crucial reasons of high infection and deaths(COVID-19)is co-morbidity of people. | Biswajit Bera Sumana Bhattacharjee Nairita Sengupta Soumik Saha | 2022 | Geoscience Frontiers2022，13，1： | 2 |
| 14 | A novel structure of DNA repair protein RecO from Deinococcus radiodurans 显示文摘 | Makharashvili N Koroleva O Bera S | 2004 | Structure2004，12，10： | 1 |
| 15 | Diotortion product otoacoustie emission and sensorineural hearing loss显示文摘 | Moulin A Bera IC | 1994 | Audiology1994，33，2： | 1 |
| 16 | Cloning,sequencing and expression of cDNA of bovine neutrophilβ-defensin from water buffalo(Bubalus bubalis)显示文摘 | BERA B C CHAUDHURY P BHATTACHARYA D | 2007 | Int J Immunogenet2007，34，3： | 1 |
| 17 | Analytical solution of a dynamic system containing fractional derivative of order one-half by Adomian decomposition method显示文摘 | Saha Ray S Poddar B P Bera R K | 2005 | ASME J Appl Mech2005，72，2： | 1 |
| 18 | On the formation mechanism of BaTiO3-BaZrO3 solid solution through solid-oxide reaction 显示文摘 | Bera J Rout S K | 2005 | Materials Letters2005，59，： | 1 |
| 19 | Analytical approximate solution of nonlinear dynamic system containing fractional derivative by modified decomposition method 显示文摘 | SAHA R S CHAUDHURI K S BERA R K | 2006 | Applied Mathematics and Computation2006，182，1： | 1 |
| 20 | A genetic overhaul of Saccharomyces cerevisiae 424A (LNH-ST) to improve xylose fermentation显示文摘 | Bera AK Ho NW Khan A | 2011 | Journal of Industrial Microbiology & Biotechnology2011，38，5： | 1 |
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