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Structural, Optical and Electrical properties of Evaporated CdSe Films

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Journal of Materials Science & Technology 1995年第2期11卷 97-101页

作者： H.p. sarma, N.Rangaraan and K.R.Murali(Central Electrochemical Research Institute, Karaikudi -623 006, India) Central Electrochemical research Inst Karaikudi India

CdSe films are of great interest for use in thin film photoelectric devices. A simple chemical precipitation method is adopted for the first time to synthesise CdSe powder. Films on glass obtained at different substrate temperatures TS such as 300, 373, 423 and 473 K have been characterised by X-ray diffraction, optical absorption and Hall measurements.

关键词： CdSe ASTM Structural Optical and Electrical properties of Evaporated CdSe Films

Diversity of endophytic fungi associated with Hedychium spicatum Ham ex *** their antifungal activity against the phytopathogen Alternaria solani

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Studies in Fungi 2020年第1期5卷 84-93页

作者： sarma p Dkhar MS Kayang H Kumar M Dubey NK Raghuwanshi R Microbial Ecology Laboratory Department of BotanyNorth Eastern Hill UniversityShillong793022 Department of Botany Banaras Hindu UniversityVaranasi221005 Department of Botany Mahila MahavidyalayaBanaras Hindu UniversityVaranasi221005

Twenty eight strains of endophytic fungi including sterile mycelia were isolated from the leaf,rhizome and roots of Hedychium spicatum Ham *** of the endophytic fungi isolated belonged to the phylum Ascomycota which accounted of about 84%.The endophytic assemblage was dominated by the class *** fungal genera such as Fusarium and penicillium were found to be common to all the plant *** of endophytic fungi was found to be highest in the roots(H’=2.43).Mucor hiemalis,penicillium sp.,penicillium expansum,***,phoma medicaginis,Trichoderma *** *** showed above 60%inhibition against the phytopathogen Alternaria solani.

关键词： Colonization frequency diversity index percentage inhibition

Investigation of proton structure function F_(2)^(p)at HERA in light of an analytical solution to the Balitsky–Kovchegov equation

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Communications in Theoretical physics 2024年第3期76卷 120-126页

作者： Ranjan Saikia pragyan phukan Jayanta Kumar sarma HEp laboratory Department of PhysicsTezpur UniversityTezpurAssam-784028India Department of physics Moran CollegeMoranhatAssam-785670India

In this paper,the proton structure function F_(2)^(p)(x,Q^(2))at small-x is investigated using an analytical solution to the Balitsky–Kovchegov(BK)*** the context of the color dipole description of deep inelastic scattering(DIS),the structure function F_(2)^(p)(x,Q^(2))is computed by applying the analytical expression for the scattering amplitude N(k,Y)derived from the BK *** transverse momentum k and total rapidity Y,the scattering amplitude N(k,Y)represents the propagation of the quark-antiquark dipole in the color dipole description of *** the BK solution we extracted the integrated gluon density xg(x,Q^(2))and then compared our theoretical estimation with the LHApDF global data fits,NNpDF3.1sx and ***,we have investigated the behavior of F_(2)^(p)(x,Q^(2))in the kinematic region of 10^(-5)≤x≤10^(-2)and 2.5 GeV^(2)≤Q^(2)≤60 GeV^(2).Our predicted results for F_(2)^(p)(x,Q^(2))within the specified kinematic region are in good agreement with the recent high-precision data for F_(2)^(p)(x,Q^(2))from HERA(H1 Collaboration)and the LHApDF global parametrization group NNpDF3.1sx.

关键词： quantum chromodynamics(QCD) perturbative QCD(pQCD) proton structure function small-x Balitsky-Kovchegov equation

Influence of Annealing on X-Ray Radiation Sensing properties of TiO2 Thin Film

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photonic Sensors 2018年第1期8卷 70-79页

作者： M. p. sarma J. M. KALITA G. WARY Department of physics Cotton University Guwahati 781001 India Department of physics and Electronics Rhodes University P. O. Box 94 Grahamstown 6140 South Africa

A recent study shows that the titanium dioxide （TiO2） thin film synthesised by a chemical bath deposition technique is a very useful material for the X-ray radiation sensor. In this work, we reported the influence of annealing on the X-ray radiation detection sensitivity of the TiO2 film. The films were annealed at 333 K, 363K, 393K, 473 K, and 573K for 1 hour. Structural analyses showed that the microstrain and dislocation density decreased whereas the average crystallite size increased with annealing. The band gap of the films also decreased from 3.26eV to 3.10eV after annealing. The I-V characteristics record under the dark condition and under the X-ray irradiation showed that the conductivity increased with annealing. The influence of annealing on the detection sensitivity was negligible if the bias voltage applied across the films was low （within 0.2V - 1.0V）. At higher bias voltage （〉1.0V）, the contribution of electrons excited by X-ray became less significant which affected the detection sensitivity.

关键词： Titanium dioxide (TiO2) thin film annealing X-ray sensor

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在金伯利岩探测中负的磁化反差

中国科技信息 2007年第4期 34-36页

作者： B.S.p.sarma. B.K.Verma 黄伟屏广东省有色金属地质勘查局九三一队

磁法广泛应用于探测金伯利岩,金伯利岩常常含有作为副矿物的磁铁矿。未风化的金伯利岩通常产生明显的磁异常。但风化的金伯利岩则不同,根据风化程度,风化的金伯利岩大大失去了磁性,实际上变为无磁性。风化似乎阻碍了用磁性探测,但这样... 详细信息

磁法广泛应用于探测金伯利岩,金伯利岩常常含有作为副矿物的磁铁矿。未风化的金伯利岩通常产生明显的磁异常。但风化的金伯利岩则不同,根据风化程度,风化的金伯利岩大大失去了磁性,实际上变为无磁性。风化似乎阻碍了用磁性探测,但这样的金伯利岩当风化程度和范围相当大时,在磁性围岩成为磁法探测的极好目标。风化的金伯利岩和围岩之间的磁化反差变成负的。这样的风化金伯利岩在磁场图上表现的图像与正的磁化反差的正常图像是相反的。在印度南部安得拉邦沃杰勒格鲁尔地区,一个已知的高度风化的金伯利岩上进行了试验性地面磁测,得出了明显的磁响应。特征是在岩筒的正上方为平稳而宽广的梯度,在其两侧,在岩筒的北边和南边分别为“高”和“低”的闭合圈。将岩筒近似为垂直的有多边形截面的圆柱并赋予负的磁化进行了模拟。计算和观测的磁等值图表现出良好的相关关系。此项工作表明,把负的磁化赋予风化金伯利岩的方法对于探测金伯利岩是快速有效的。

关键词：磁法金伯利岩磁化反差

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印度戈伊纳地震的震源参数

世界地震译丛 1999年第2期30卷 6-15页

作者： p. Mandal B. K. Rastogi C. S. p. sarma 许健生中国地震局兰州地震研究所

在印度西南部有一个从戈伊纳水库向南延伸30km的地震带。在过去的34年里,已经记录到了150多个M≥4的地震和10个M≥5的地震。在1993年8月到1994年12月期间,在新蓄水的瓦尔纳水库区突然发生了一系列地震。震中区在戈伊纳大坝南25km处,两... 详细信息

在印度西南部有一个从戈伊纳水库向南延伸30km的地震带。在过去的34年里,已经记录到了150多个M≥4的地震和10个M≥5的地震。在1993年8月到1994年12月期间,在新蓄水的瓦尔纳水库区突然发生了一系列地震。震中区在戈伊纳大坝南25km处,两个水库之间,但离新水库近。在1994年,国家地球物理研究所在戈伊纳-瓦尔纳水库地区布设了数字地震仪观测系统。其目的是研究该地区发生地震的物理过程,3个地震台从1994年10月到1995年6月记录到了193个M=1.5～4.7的地震,用它们的横波波谱资料估算了震源参数。对1.5～4.7级的地震作波谱分析之后求得地震矩范围为10^(11)～10^(16)N·m,震源半径范围为94～538m,应力降范围为0.03～19Mpa。由观测结果知M≥3地震与2Mpa以上的大应力降有关。大能量释放(通过多次M≥3的地震)和高应力降的地震多发生在0～1km和5～10km这个深度范围。1～4km这个深度发生地震的次数少,且应力降也低。这种大能量释放和高应力降现象可能是由于在0～1km这个深度上岩石的低流体静压力条件和5～13km深度上岩石的饱和流体静压力条件下引起的应力高度集中和应力增加。特别值得一提的是,M≥3的高应力降地震,现在很少发生在戈伊纳水库附近,却经常发生在新水库附近。

关键词：地震震源系数印度戈伊纳地震

Diversity of endophytic fungi associated with the medicinally important aromatic plant Gaultheria fragrantissima

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Studies in Fungi 2018年第1期3卷 309-320页

A total of thirty three(33)endophytic fungi including sterile mycelia were isolated from the leaf,stem and roots of medicinally important aromatic plant Gaultheria *** of the fungi belonged to the phylum *** total percentage colonization frequency(%CF)of each endophytic fungal species was calculated of which Juxtiphoma eupyrena showed highest colonization frequency(20.14%)in the leaf whereas Globisporangium irregulare was found to have highest colonization frequency in the stem(14.58%)and in the roots,Trichoderma viride was observed to have the highest colonization frequency of 21.43%.Diversity of endophytic fungi in the roots was found to be higher as compared to the other plant tissues.

关键词： Colonization frequency endophytic fungi Jaccards’s index relative abundance

Nonlinear ion-acoustic solitary waves in an electron-positron-ion plasma with relativistic positron beam

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Chinese physics B 2018年第10期27卷 471-476页

作者： Ridip sarma Amar p Misra Nirab C Adhikary Department of Mathematics University of Science and TechnologyTechno CityKhanaparaBaridua9th MileRi-BhoiMeghalayaIndia Department of Mathematics Siksha BhavanaVisva-Bharati University physical Sciences Division Institute of Advanced Study in Science and TechnologyVigyan PathPaschim BoragaonGarchukGuwahati-781035AssamIndia

The propagation characteristics of nonlinear ion–acoustic（IA） solitary waves（SWs） are studied in thermal electron–positron–ion plasma considering the effect of relativistic positron beam. Starting from a set of fluid equations and using the reductive perturbation technique, we derive a Korteweg–de Vries（KdV） equation which governs the evolution of weakly nonlinear IA SWs in relativistic beam driven plasmas. The properties of the IA soliton are studied, and it is shown that the presence of relativistic positron beam significantly modifies the characteristics of IA solitons.

关键词： electron-positron-ion plasma relativistic effect ion-acoustic wave homogeneous balance method

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胞质不育原种的组织培养繁殖

广东农业科学 1988年第1期 47-47页

作者： D.S.Kumari N.p.sarma 潘晓华

在愈伤组织培养中,通过大量不定胚状体所形成的体细胞胚胎,用于杂交稻生产中大量繁殖胞质不育系原种,是一个值得探讨的课题。这是因为胞质不育系（A）原种一般是通过同核保持系（B）授粉而得到保持。为了大量繁殖,不育系和保持系通常是... 详细信息

在愈伤组织培养中,通过大量不定胚状体所形成的体细胞胚胎,用于杂交稻生产中大量繁殖胞质不育系原种,是一个值得探讨的课题。这是因为胞质不育系（A）原种一般是通过同核保持系（B）授粉而得到保持。为了大量繁殖,不育系和保持系通常是在隔离条件下采用隔行种植。我们成功地应用组织培养技术,大量繁殖了4个具有 WA 细胞质的胞质不育系——V20A、Madhu A、IR48483A和 IR46830A。将去壳不育系种子培养在每升含有2,4-D2毫克的 N6培养基上,诱导愈伤组织的产生。在3—4星期内,每一粒种子胚,可产生400-500毫克的愈伤组织块。将培养4星期胚分化的愈伤组织,转移到

关键词：胞质不育系原种愈伤组织创伤组织