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用LR-115型塑料径迹探测器测定氡-钍射气

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世界核地质科学 1987年第4期 24-26页

作者： Manwinder singh N.P.singh 谈成龙

用LR-115型塑料径迹探测器和氡-钍射气鉴别器测定了guru Nanak Dev大学校园地区土壤中的氡(Rn)和钍射气(Tn)含量,并研究了土壤不同深度的径迹产生率,也确定了取自试验区土壤样中与氡辐射正相关的铀含量。用LR-115型塑料径迹探测器也研... 详细信息

用LR-115型塑料径迹探测器和氡-钍射气鉴别器测定了guru Nanak Dev大学校园地区土壤中的氡(Rn)和钍射气(Tn)含量,并研究了土壤不同深度的径迹产生率,也确定了取自试验区土壤样中与氡辐射正相关的铀含量。用LR-115型塑料径迹探测器也研究了生长在试验区附近的植物氡辐射率,发现植物叶子的氡辐射大干其茎部。

关键词：射气辐射率植物探测器铀含量径迹密度

Establishment of magneto-dielectric effect and magneto-resistance in composite of PLT and Ba-based U-type hexaferrite

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Journal of Advanced Dielectrics 2023年第5期13卷 42-47页

作者： Kanika Aggarwal Madan Sharma Shubhpreet Kaur Vishal Arora Indu Sharma Rakesh Kumar Anupinder singh Department of Physics Sant Longowal Institute of Engineering and Technology Longowal 148106PunjabIndia Multifunctional Materials Laboratory Department of PhysicsGuru Nanak Dev University Amritsar 143005PunjabIndia Department of Physics and Electronics Hindu College Amritsar 143001PunjabIndia Department of Physics Career Point UniversityHamirpur 176041 Himachal PradeshIndia Ludhiana Group of Colleges Affiliated by IKGPTU Kapurthala 140407 PunjabIndia

We are examining the behavior of a composite made of ferroelectrics with strong dielectric properties and ferrites with magnetic properties due to the rising need for materials for multipurpose *** application avenues will be favored by the pairing of these materials’individual qualities with one *** and U-type hexaferrite composite materials have been chosen for this study based on their magnetic and dielectric *** composites,(1−x)PLT−x(Ba1−3xNd2x)4Co2Fe36O60 where x=0.52,0.54,0.56,0.58 are prepared by solid state reaction method and phase formation was *** has been given to the magnetic,dielectric,and magneto-dielectric *** work has established the link between the electric and magnetic domains while applying electric and magnetic forces to the *** magneto-dielectric research revealed magneto-electric coupling in all of the ***,the sample shows the maximum coupling for x=0.54 with MDR%values of 93.17%,which might be because this sample appears to have a high magneto-resistance(161%).

关键词： Perovskite U-type hexaferrite magneto-dielectric effect magneto-resistance response

Enhanced electrical conductivity in Zr-Doped(La_(0.7)Ba_(0.3))(Mn_(0.5)Fe_(0.5))O_(3)solid solutions

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Journal of Advanced Dielectrics 2020年第6期10卷 61-68页

作者： Yogesh Kumar Jaswinder Pal Parambir singh Malhi Rakesh Kumar CT University Sidhwan Khurd LudhianaPunjab 142024India Department of Physics Baba Farid College(Affiliated to Punjabi UniversityPatiala)BathindaPunjab 151001India Department of Chemistry Guru Nanak Dev University AmritsarPunjab 143005India Ludhiana Group of Colleges Chokimann LudhianaPunjab 142001India

The perovskite(La_(0.7)Ba_(0.3))(Mn_(0.5)Fe_(0.5))_(1−x)Zr_(x)O_(3),where x=0.1,0.2 and 0.3,ceramics were synthesized by solid-state reaction *** introductory structural studies were followed through by X-ray diffraction technique and the results have disclosed that all the samples were crystallized into an isolated *** Zr substitution in the resulting solid solutions increases the electrical conductivity and the maximum value of ac conductivity has been found to be~118.8 ***^(−1)for x=0.3 at 200°C(at 1 MHz).The frequency dependence of ac conductivity data follows Jonscher’s power *** variation of the exponent n versus temperature follows the nonoverlapping small polaron tunneling(NSPT)*** dielectric relaxation has been observed to be of non-Debye nature for all measuring temperatures(50-200°C).The impedance spectroscopy reveals that all the samples exhibit negative temperature coefficient of resistance(NTCR)*** prepared samples(for x>1)are supposed to be suitable for cathode materials in SOFCs.

关键词： SOFC perovskite X-Ray Diffraction(XRD) ac conductivity dielectric

Comparative H2S Sensing Characteristics of Fe2O3: Thin Film vs. Bulk

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Soft Nanoscience Letters 2013年第4期3卷 6-8页

作者： Vishal Balouria Ajay singh Niranjan Suryakant Ramgir Anil Krishan Debnath Aman Mahajan Ratish Kumar Bedi Dinesh Kumar Aswal Shiv Kumar Gupta Material Science Laboratory Department of Physics Guru Nanak Dev University Amritsar India. Technical Physics Division Bhabha Atomic Research Center Mumbai India Technical Physics Division Bhabha Atomic Research Center Mumbai India

Comparative investigations of gas sensing characteristics of Fe2O3 in both thin film as well as bulk forms have been performed. Thin film sensors were realized by first depositing Fe films using electron-beam evaporation followed by thermal oxidation. Bulk sensors in the form of pellets were prepared by cold pressing commercial Fe2O3 powder with subsequent sintering. Both thin film and bulk Fe2O3 sensors exhibited a selective and reversible response characteristics towards H2S with maximum response at an operating temperature of 250°C and 200°C, respectively. A negligible response towards other interfering gases was observed. Thin film sensors exhibited an enhanced response in comparison to that of pellets.

关键词： Fe2O3 Thin Film Pellets H2S Sensor

Structural and Raman Spectroscopic Study of Antimony Doped Bi0.5Na0.5TiO3Electroceramic

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Journal of Materials Science and Chemical Engineering 2015年第8期3卷 43-49页

作者： K. N. singh Versha Sao P. Tamrakar S. Soni V. K. Dubey P. K. Bajpai Department of Physics Dr. C. V. Raman University Bilaspur India Department of Physics Government Science PG College Bilaspur India Advance Materials Research Laboratory Guru Ghasidas Vishwavidyalaya Bilaspur India

Pure and Antimony (Sb, x = 0.01%, 0.02% and 0.03%) doped Bi0.5Na0.5TiO3 electro ceramics were successfully synthesized by a conventional solid state reaction route. X-ray diffraction analysis showed that a distinct 002/200 peak splitting appears when doping percentage changes from 0.02 to 0.03, referring to a hexagonal symmetry. The data show the Lorentzian deconvolution of the 002 and 200 peaks of the tetragonal phase and the 202 peak of the rhombohedral phase. There is no significant change in the Raman spectra for the prepared compositions while some additional peaks around 151, 281, 585 and 853 cm-1 compared to the peaks observed in BNT. It may be possible that a morphotrophic phase boundary (MPB) exists around x = 0.03. Analysis of peak positions, widths and intensities of Raman spectroscopy study also confirmed the existence of structural change around x = 0.03 composition.

关键词： Ceramics X-Ray Diffraction Raman Spectroscopy

Synthesis and cytotoxic evaluation of substituted 3-(3'-indolyl-/3'-pyridyl)-isoxazolidines and bis-indoles

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Acta Pharmaceutica Sinica B 2012年第1期2卷 32-41页

作者： Vishal Sharma Raman Kalia Tilak Raj Vivek K.Gupta Nitasha Suri Ajit K.Saxena Deepak Sharma Surinderjit S.Bhella Gurpinder singh Mohan Paul S.Ishar Bio-Organic and Photochemistry Laboratory Department of Pharmaceutical SciencesGuru Nanak Dev UniversityAmritsar 143005India Pharmacology Division Indian Institute of Integrative MedicineJammu 180001India Post-Graduate Department of Physics University of JammuJammu Tawi 180006India

Regio-and stereoselective 1,3-dipolar cycloadditions of C-(3-indolyl)-N-phenylnitrone(10)were carried out with different mono-substituted,disubstituted and cyclic dipolarophiles under mono-mode microwave irradiation to obtain substituted 3-(indol-30-yl)-N-phenyl-isoxazolidines(16–22).Reactions of nitrone(10)with allenic esters under similar conditions afforded,via a domino process,bis-indole derivatives(23a–c)along with compounds 24 and ***,reactions of C-(3-pyridyl)-N-phenylnitrone(26)with mono-substituted,disubstituted and cyclic dipolarophiles were carried out in refluxing dry toluene to obtain substituted 3-(30-pyridyl)-Nphenylisoxazolidines(27–34).Some of the compounds(16f,18b,23a,23c,27c and 29f)display significant cytotoxicity against a number of human cancer cell lines.

关键词： 3-Indolylisoxazolidines 3-Pyridylisoxazolidines Bis-indoles 1,3-Dipolar cycloadditions Modified nucleosides Cytotoxic activity

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月见草属植物药用价值的研究综述(英文)

中西医结合学报 2012年第7期10卷 717-725页

作者： Sumitra singh Rupinder Kaur Surendra Kr.Sharma Department of Pharmaceutical Sciences Guru Jambheshwar University of Science and TechnologyHisar 125001HaryanaIndia

月见草属植物很早就被传统医学用于治疗哮喘、肠胃功能紊乱、神经痛、皮肤病以及肝肾等疾病。从月见草属植物中可以分离出脂质、类黄酮、丹宁酸、类固醇、三萜烯等化学成分。月见草属植物具有细胞毒作用以及抗氧化、抗菌、抗病毒、抗炎... 详细信息

月见草属植物很早就被传统医学用于治疗哮喘、肠胃功能紊乱、神经痛、皮肤病以及肝肾等疾病。从月见草属植物中可以分离出脂质、类黄酮、丹宁酸、类固醇、三萜烯等化学成分。月见草属植物具有细胞毒作用以及抗氧化、抗菌、抗病毒、抗炎、抗高血脂、溶解血栓和止泻等各种显著的药理活性。本文对近50年来有关月见草属植物化学成分及生物活性的研究进行了综述,旨在为今后进一步研究月见草属植物治疗各类疾病提供参考。

关键词：月见草属植物,药用类黄酮物质单宁类抗氧化剂抗菌药

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印度拉贾斯坦邦北部乡村饮用水的氟化物污染

水文地质工程地质技术方法动态 2009年第1期 16-20页

作者： V. K. Garg S. singh 赵玉军（翻译）安永会（校对） guru Jambheshwar University of Science and Technology Hisar 125001 India Department of Chemistry N. M. （PG） CollegeHanumangarh Town 335 513 India 不详

本文对印度拉贾斯坦邦北部以地下水为主要饮用水源的一些乡村进行了地下水氟化物污染评价。分析了利用手压泵从深含水层采集的水样的氟化物含量。目前，研究区内记录在案的氟化物的浓度范围为1．01m4．78mg／L。研究区地下水中氟化物的... 详细信息

本文对印度拉贾斯坦邦北部以地下水为主要饮用水源的一些乡村进行了地下水氟化物污染评价。分析了利用手压泵从深含水层采集的水样的氟化物含量。目前，研究区内记录在案的氟化物的浓度范围为1．01m4．78mg／L。研究区地下水中氟化物的平均浓度为2．82mg／L。根据世界卫生组织（WHO）或者印度标准办公署制定的饮用水中氟化物的期望浓度（desirable limit）和最大容许浓度，研究区内约95％的地下水不适于饮用。在研究区，由于饮用水中氟化物的浓度很高，目前氟斑牙和氟骨征患者正以惊人的速率增长。在印度最北部的哈努芒加尔县的中部和东部地区，由于地下水中氟化物的浓度相对较高（3-4mg／L），因此，可把这些地区列为氟中毒高风险地区。对本项研究所得数据进行评价后得出结论，在研究区采取改良措施来预防居民氟中毒刻不容缓。

关键词：饮用水氟化物氟中毒地下水印度拉贾斯坦邦

Role of positron emission tomography-computed tomography in non-small cell lung cancer

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World Journal of Methodology 2016年第1期6卷 105-111页

作者： Pankaj Kumar Garg Saurabh Kumar singh Gaurav Prakash Ashish Jakhetiya Durgatosh Pandey Department of Surgery University College of Medical Sciences and Guru Teg Bahadur HospitalUniversity of Delhi Department of Surgical Oncology Dr BRA Institute Rotary Cancer HospitalAll India Institute of Medical Sciences Department of Pulmonary Medicine Gajra Raja Medical College and Jaya Arogya Group of Hospitals Clinical Hematology and Bone Marrow Trans- plant unit Department of Internal MedicinePost-Graduate Institute of Medical Education and Research

Lung cancer is the leading cause of cancer-related mortality worldwide. Non-small cell carcinoma and small cell carcinoma are the main histological subtypes and constitutes around 85% and 15% of all lung cancer respectively. Multimodality treatment plays a key role in the successful management of lung cancer depending upon the histological subtype, stage of disease, and performance status. Imaging modalities play an important role in the diagnosis and accurate staging of the disease, in assessing the response to neoadjuvant therapy, and in the follow-up of the patients. Last decade has witnessed voluminous upsurge in the use of positron emission tomography-computed tomography(PET-CT); role of PET-CT has widened exponentially in the management of lung cancer. The present article reviews the role of 18-fluoro-deoxyglucose PET-CT in the management of non small cell lung cancer with emphasis on staging of the disease and the assessment of response to neoadjuvant therapy based on available literature.

关键词： Positron emission tomography Diagnostic imaging Neoplasm staging Carcinoma Non-small-cell lung cancer Lung neoplasms