Indian Journal of Pure & Applied Physics最新文献_第4页

Self-Focusing and Defocusing of Lorentz-Gauss Laser Beam in Collisionless Plasma 洛伦兹-高斯激光束在无碰撞等离子体中的自聚焦和离焦

4区物理与天体物理

Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i11.2450

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Tuning of Magnetism and Band Gap in 2D-Chromia via Strain Engineering 基于应变工程的二维chromia的磁性和带隙调谐

4区物理与天体物理

Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i11.4472

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Synthesis and Characterization of Activated Carbon from Corn Cobs using KOH Activation KOH活化法合成玉米芯活性炭及表征

4区物理与天体物理

Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i11.3470

{"title":"Synthesis and Characterization of Activated Carbon from Corn Cobs using KOH Activation","authors":"","doi":"10.56042/ijpap.v61i11.3470","DOIUrl":"https://doi.org/10.56042/ijpap.v61i11.3470","url":null,"abstract":"The enormous production of agricultural waste has created major problems for polluting the environment. Current efforts are focused on developing cost-effective and eco-friendly alternatives for disposal of waste materials. Agricultural wastes might be utilized as biochar and activated carbon (AC) precursors due to their higher carbon contents. In the present study, the activated carbon derived from corn cob biomass has been prepared successfully by the pyrolysis method at different temperatures i.e. 600 & 800 °C using potassium hydroxide activation. The synthesized materials (AC) were characterized using different techniques like X-ray diffraction, UV-Visible Spectroscopy, FTIR and N2 adsorption/desorption isotherm. The FTIR study identified the functional groups and XRD analysis revealed the structure of the prepared material. The FE-SEM images showed that activation of biochar resulted into formation of porous activated carbon with various shapes and sizes of pores. The high surface area 575 m2/g and pore volume 0.291 cm3/g of AC at 800 °C temperature were observed with BET analysis. The optical band gap determined using UV-Vis absorption spectroscopy indicates that the absorption edge lies in the ultra-violet region of the optical spectra. The findings of the present study highlight the potential of utilizing agro-wastes as effective precursors for producing activated carbon with minimal expenses. This carbon variant shows promise in various applications such as water purification, metal recovery, energy devices, etc.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136305666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Small-field Dosimetry of 6- and 10-MV Flattening Filter-free and Flattening Filter Photon Beams for Therapeutic Use 治疗用6 mv和10 mv无压扁滤波和压扁滤波光子束的小场剂量测定

4区物理与天体物理

Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i10.2827

{"title":"Small-field Dosimetry of 6- and 10-MV Flattening Filter-free and Flattening Filter Photon Beams for Therapeutic Use","authors":"","doi":"10.56042/ijpap.v61i10.2827","DOIUrl":"https://doi.org/10.56042/ijpap.v61i10.2827","url":null,"abstract":"This investigation aimed to measure and commission small unflat photon beams using the detectors described in our previous study10. Furthermore, the dosimetric parameters of small-field unflat and flat photon beams were compared to provide a better interpretation of beam energy and spectrum. The TrueBeam linear accelerator (TrueBeam LINAC, Varian Medical Systems) was employed in this study. The 10 and 6 MV unflat and flat photon beams were used to measure the output factor, depth dose, and beam profile of small-fields ranging in size from 1 cm × 1 cm to 6 cm × 6 cm. All measurements were performed according to the TRS-483 protocols established by the International Atomic Energy Agency. For both 10 and 6 MV, the output factors in unflat beam were significantly higher than in flat beam. The study found that unflat beam penumbras were slightly smaller than flat beam penumbras for both photon energies, which may improve tumor conformity and reduce doses to normal organs. The unflat photon beams had higher suface doses and lower depth doses at 10 cm than the flat photon beams for both energies, leading to considerably more beam energy degradation for unflat beams. The findings of this work are consistent with previously published data, and they will be useful for future research and LINAC commissioning.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In In-silico Identification of Potential Inhibitors of Human Dihydrouridine Synthase 2 for Cancer Therapy 用于癌症治疗的人二氢吡啶合酶2潜在抑制剂的计算机鉴定

4区物理与天体物理

Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i9.3495

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Structural and optical properties of α-Fe2O3/ZnO nanocomposite in wastewater treatment α-Fe2O3/ZnO纳米复合材料在废水处理中的结构和光学性能

4区物理与天体物理

Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i9.3406

{"title":"Structural and optical properties of α-Fe2O3/ZnO nanocomposite in wastewater treatment","authors":"","doi":"10.56042/ijpap.v61i9.3406","DOIUrl":"https://doi.org/10.56042/ijpap.v61i9.3406","url":null,"abstract":"The present work aims to investigate the structural and optical characteristics of α-Fe2O3, ZnO, and α-Fe2O3/ZnO nanocomposite synthesized by hydrothermal method and their application in the purification of dye-contaminated water. Synthesized samples were characterized by XRD, UV and FTIR. The XRD pattern of α-Fe2O3/ZnO nanocomposite revealed two distinct phases corresponding to α-Fe2O3 and ZnO in the synthesized nanocomposite. The characteristic absorbance peaks of α-Fe2O3/ZnO nanocomposite were observed in UV visible spectra with a bandgap of 2.50 eV. The photocatalytic properties of the as-synthesized nanocomposite have been evaluated by the photodegradation of methylene blue (MB) dye under UV irradiation. Compared to the pure metal oxides (α-Fe2O3 and ZnO), the enhanced photodegradation efficiency of nanocomposite for MB dye was observed to be 78% in 105 minutes. This improved photocatalytic activity can be ascribed to the efficient charge transfer in the corresponding nanocomposite, which in turn can be attributed to the reduced recombination probability of photo-induced carriers. The as-synthesized nanocomposite could be appropriate for dye wastewater treatment.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Analysis of Natural Uranium in Groundwater of Jhajjar District of Haryana, India using LED Fluorimeter 用LED荧光计分析印度哈里亚纳邦Jhajjar地区地下水中的天然铀

4区物理与天体物理

Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i11.3364

{"title":"Analysis of Natural Uranium in Groundwater of Jhajjar District of Haryana, India using LED Fluorimeter","authors":"","doi":"10.56042/ijpap.v61i11.3364","DOIUrl":"https://doi.org/10.56042/ijpap.v61i11.3364","url":null,"abstract":"Natural radioactivity has been a part of the environment since the creation of earth. Natural elements like uranium and its by-products can be reason of health problems if they are present in groundwater at excessive amount. Uranium is very harmful because it is very toxic. This study gives the information about the uranium concentration in 40 groundwater samples collected from different water sources like hand pump and tube wells of different depths from numerous locations of Jhajjar district of Haryana, India. Uranium concentration was measured using the LED fluorimetry technique. The observed value of uranium concentration ranged from 5 μgL-1 to 91 μgL-1 with mean value of 28.49 μgL-1. The mean value of uranium concentration is below the safe limit suggested by World Health Organisation (WHO) and Atomic Energy Regulatory Board (AERB), India. The uranium concentration in some region is high because of nearby industries, increasing uses of fertilizer for agriculture and the local subsurface geology of the region. The calculated risk factors for lifelong cancer morbidity and mortality are not significant because they are much lower than the permitted hazard limits. The chemical toxicity of uranium is measured in form of LADD (Lifetime Average Daily Dose) value was ranging from 0.39 to 6.67 μg kgˉ¹ dayˉ¹ with mean value of 2.02 μg kgˉ¹ dayˉ¹g which is more than the WHO recommended daily consumption threshold of LADD of 1.0 μg kgˉ¹ dayˉ¹. Values of annual effective dose is varying from 0.89-15.16 μSv/Y with mean value is 4.74 μSv/Y, which is below the safe limit of 100 μSv/y (WHO).","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136305225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Crystallographic, Quantum Chemical and Molecular Docking Analysis of a Benzoic Acid Derivative 苯甲酸衍生物的晶体学、量子化学和分子对接分析

4区物理与天体物理

Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i9.3312

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Assessment of Age-Dependent Radiation Dose and Toxicological Risk of Uranium in Ground Water around Uranium Mines in Sikar, Rajasthan 拉贾斯坦邦锡卡尔地区铀矿周围地下水中铀的年龄依赖性辐射剂量及毒理学风险评估

4区物理与天体物理

Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i10.2690

{"title":"Assessment of Age-Dependent Radiation Dose and Toxicological Risk of Uranium in Ground Water around Uranium Mines in Sikar, Rajasthan","authors":"","doi":"10.56042/ijpap.v61i10.2690","DOIUrl":"https://doi.org/10.56042/ijpap.v61i10.2690","url":null,"abstract":"Uranium concentration in forty-six groundwater samples collected from the region near the uranium deposits in the Royal village of Sikar district, Rajasthan, is determined using the LED fluorimetry technique. Age-dependent annual effective dose, radiological, and chemical toxicity risks are calculated to assess health risks associated with the groundwater for the people living in the nearby area. Uranium concentrations of different samples vary from 4.79–266.28 µg/L with an average value of 74.36 µg/L Overall 69% and 43% of samples exhibit uranium concentrations greater than recommended limits of WHO and AERB, respectively. Excess cancer risk values lie in the range from 1.36 × 10-5-7.54 × 10-4and 2.10 × 10-5-1.17 × 10-3 with mean values of 2.11 × 10-4 and 3.26 × 10-4 for mortality and morbidity, respectively. LADD value lies in the range of 0.35 µg/kg/day to 19.51 µg/kg/day with a mean value of 5.44 µg/kg/day. The hazard quotient value for 43.4% and 84.7% of samples is greater than unity according to AERB and WHO standards, respectively. The uranium retention and effective radiological dose to various body organs are estimated using biokinetic modelling. Physico-chemical parameters and their correlation with uranium concentration are also evaluated. A positive correlation is found between TDS and uranium concentration.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Hole Transport Layer Optimization for Mixed Halide Perovskite based Solar Cells to achieve Better Photovoltaic Performance 混合卤化物钙钛矿基太阳能电池的空穴传输层优化以获得更好的光伏性能

4区物理与天体物理

Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i10.2573

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