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Puerto Rico’s Water Supply: An Investigation of the Levels of Trihalomethanes and Other Contaminants

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Journal of Geoscience and Environment Protection 2023年第8期11卷 1-21页

作者： Yaritza Jones Wendy Wilburn Sujata guha Ryan Beni Department of Chemistry Tennessee State University Nashville TN USA

The US Commonwealth of Puerto Rico is comprised of 143 islands, atolls, cays, and islets. Of the 143 localities, only 3 islands are inhabited: The mainland (often referenced as Puerto Rico), Culebra, and Vieques. To properly analyze the water supply quality, the mainland will be the focal point for examining environmental and social injustices. Puerto Rico is a racially diverse but ethnically homogenous territory, with most of the commonwealth living below the poverty level. Access to clean water sources is always tenuous in Puerto Rico. Over 70 percent of the island is served by water, violating US health standards. However, the recent hurricanes made the situation even more detrimental. According to data reported between January 2015 and March 2018 by the Consumer Confidence Report (CCR), 97 percent of the population of Puerto Rico utilizes a common drinking water system with one or more recent violations of the Safe Drinking Water Act for its testing requirements for lead and copper levels. The amounts found were far higher than any US state, meaning that virtually everyone on the island gets water from systems that violated testing or reporting requirements. In this study, we have collected and analyzed the levels of trihalomethanes (THMs), haloacetic acids (HAAs), copper, lead, and total organic compounds (TOCs) in drinking water providing systems in Puerto Rico and compared them with the recommended levels of contaminants provided by the US Environmental Protection Agency (EPA) guidelines. Many of these reported contaminants can have serious and detrimental health effects after prolonged exposure to higher concentrations of the contaminants found in the drinking water sources of Puerto Rico.

关键词： Water Quality Social Disparity Puerto Rico Contaminants Household Income Income Per Capita Environmental Justice Hurricane Maria

Improved Ostrowski-Like Methods Based on Cubic Curve Interpolation

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Applied Mathematics 2011年第7期2卷 816-823页

作者： Janak Raj Sharma Rangan Kumar guha Rajni Sharma 不详

In this paper, we derive two higher order multipoint methods for solving nonlinear equations. The methodology is based on Ostrowski’s method and further developed by using cubic interpolation process. The adaptation of this strategy increases the order of Ostrowski’s method from four to eight and its efficiency index from 1.587 to 1.682. The methods are compared with closest competitors in a series of numerical examples. Moreover, theoretical order of convergence is verified on the examples.

关键词： Nonlinear Equations Ostrowski’s Method Root-Finding Order of Convergence Cubic Interpolation

Efficacy of propofol versus ketamine in modified electroconvulsive therapy: A prospective randomized control trial

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Journal of Acute Disease 2022年第3期11卷 89-93页

作者： Debarshi guha Kiran Sheshadri Shalendra Singh Sonia Bhan Department of Anaesthesiology and Critical Care Armed Forces Medical CollegePune 411040India

Objective:To investigate the effects of propofol and ketamine on seizure duration,hemodynamics,and recovery of electroconvulsive therapy(ECT).Methods:This prospective randomized trial included patients who had undergone ECT under *** received injection of propofol 1.5 mg/kg i.v.(the propofol group)or ketamine 0.8-1.2 mg/kg i.v.(the ketamine group)during *** duration,hemodynamics,and recovery were recorded and compared between the two ***:This trial included 44 patinets with 22 patients receiving propofol and 22 patients receiving *** total dose of propofol and ketamine was(105.68±25.27)mg and(81.36±24.55)mg,*** motor seizure and electroencephalogram seizure duration were prolonged in the ketamine group(P0.05);however,the mean systolic blood pressure during the procedure was significantly higher in the ketamine group(P=0.04).Besides,spontaneous eye-opening in the ketamine group took longer than that of the propofol group(P=0.001).Conclusion:Both propofol and ketamine are safe as anesthetic agents for modified ECT,and ketamine provides a longer seizure duration without hemodynamic instability or any significant complication.

关键词： Electroconvulsive therapy ECT Propofol Ketamine Motor seizure duration EEG seizure duration Haemodynamic effects

应用固体探针质谱法测定流体包裹体气体成分及气体成分在矿化过程研究中的应用

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地质地球化学 1992年第1期20卷 55-60,46页

作者： J.guha 卢焕章 M.Gagnon 栾文楼河北地质学院地质系

四极质谱仪能直接插入电离室的固体探针已用于流体包裹体的气相成分分析。这种探针可容纳一个能被连续加热或用可变的加热速率从30—750℃逐步加热的固体样品,爆裂的气体直接释放到光谱仪信号源中,因而可减少污染。分析应用了一个单离... 详细信息

四极质谱仪能直接插入电离室的固体探针已用于流体包裹体的气相成分分析。这种探针可容纳一个能被连续加热或用可变的加热速率从30—750℃逐步加热的固体样品,爆裂的气体直接释放到光谱仪信号源中,因而可减少污染。分析应用了一个单离子监测模式程序,这种程序可以分别地检测预选的26种气体,而且可应用这种方法分析Pg级的气体。应用面积求积仪检测并分别分析包裹体的每一个单一爆裂,计算机程序自动地查出背景值以上的基线。对于单一爆裂或不同温度区间的全部爆裂以及总区间之和,都计算了气体比值。应用常规岩相学和显微测温分析测定不同世代的包裹体及其爆裂温度,然后把含有典型流体包裹体或作分析靶的包裹体的两面抛光薄片的细片切下来,送到固体探针内并适当加热。已分析的主要气体化学形式有CO_2、CO-N_2(未区分)、H_2O、H_2S和几乎所有的轻烃类,还分析了不同主矿物,如石英、萤石、重晶石和硫化物中的流体包裹体。这种方法最重要的优点是,分析结果能与特定的包裹体类型相对应,因为只需要少量的样品,可使其从两面抛光的薄片上容易选择特定区域。另一个优点是,能够使石英的包裹体中存在的气相和与石英共生的硫化物中包裹体的气相相对应,因此可确认或否认这两种矿物捕获了相似的流体。

关键词：流体包裹体气体成分质谱法矿物

Therapeutic efficacy of artemisinin combination therapies and prevalence of S769N mutation in PfATPase6 gene of Plasmodium falciparum in Kolkata,India

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Asian Pacific Journal of Tropical Medicine 2013年第6期6卷 443-448页

作者： Pabitra Saha Arindam Naskar Swagata Ganguly Sonali Das Subhasish K guha Asit Biswas Dilip K Bera Pratip K Kundu Madhusudan Das Shrabanee Mullick Krishnangshu Ray Ardhendu K Maji Department of Microbiology Calcutta School of Tropical Medicine 108C.R.AvenueKolkata 700073India Department of Tropical Medicine Calcutta School of Tropical Medicine108C.R.AvenueKolkata 700073India Department of Microbiology Calcutta School of Tropical Medicine108C.R.AvenueKolkata 700073India Department of Health & Family Welfare Government of West BengalSwasthya BhawanSalt Lake CityKolkata-700092India Department of Zoology University of Calcutta45Ballygunge Circular RoadKolkata-700019India Department of Clinical and Experimental Pharmacology Calcutta School of Tropical Medicine108C.R.AvenueKolkata 700073India

Objective:To study the in vivo efficacy of these two ACTs in the treatment of Plasmodium falciparum {*** malaria) in Kolkata and to detennine the prevalence of mutant S769N codon of the PfATPase6 gene among field isolates of *** collected from the study area. Methods:A total of 207 *** positive cases were enrolled randomly in two study arms and followed up for 42 days as per WHO(2009) protocol.A portion of PfATPase6 gene spanning codon S769N was amplified and sequenced by direct sequencing ***:It was observed that the efficacy of bodi the ACT regimens were highly effective in the study area and no mutant S769N was detected from any ***:The used,combination AS+SP is effective and the other combination AM+I.F might be an alternative,if needed.

关键词： ACTs Plasmodium falciparum PfATPase6

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能动司法视野下凉山多元纠纷解决机制的构建

西南民族大学学报（人文社会科学版） 2019年第11期40卷 74-79页

作者：张古哈四川大学

近年来,凉山彝区出现的"德古热"和"诉讼凋敝"现象表明,理论界认为国家法与习惯法的关系中习惯法处于弱势地位的观点已经滞后于凉山彝区司法实践。德古调解具有效率高、成本低、有保障、合道德的特点。在凉山基层纠纷解决实践中,已经出... 详细信息

近年来,凉山彝区出现的"德古热"和"诉讼凋敝"现象表明,理论界认为国家法与习惯法的关系中习惯法处于弱势地位的观点已经滞后于凉山彝区司法实践。德古调解具有效率高、成本低、有保障、合道德的特点。在凉山基层纠纷解决实践中,已经出现了德古调解与司法调解和人民调解相互配合的典型案例。在"国家法——习惯法"二元权威结构下,最大化二者相互促进作用,减少相互消解作用,需要在能动司法理念指导下,处理好三对关系:即平衡好民族团结的政治目标与公平正义的司法目标的关系,处理好依法裁判和德古依习惯法调解的关系,协调好司法裁判中国家法和习惯法适用的关系。

关键词：能动司法德古习惯法纠纷解决

Bronchogenic Carcinoma in a Scleroderma Patient with Multiple Metastases： One Case Report

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Clinical oncology and cancer researeh 2010年第3期7卷 214-216页

作者： Pradipta guha Shivesh Shanker Sahai Debasis Sarkar Partha Sardar Anup Singh Bipiab Mandal Bidyut Kumar Das Sanjoy Kumar Chatterjee Department of General Medicine Medica College Kolkata 700083 West Bengal India.

IntroductionThe association between pulmonary interstitial fibrosis and the development of bronchogenic carcinoma in a patient with scleroderma has been reported rarely. It is hypothesized that intense epithelial proliferation that is accompanied by the .brotic process increases the occurrence of carcinomatous changes. We report the case of a pa-tient who presented with 3-year history of Raynaud＇s phenomenon, gradual tightening of the skin which was ignored by the patient and her family members, and a 2-week history of severe respiratory dis-tress with left shoulder and upper back pain followed by the develop-ment of paraparesis. After a series of examinations, the patient was diagnosed with scleroderma and simultaneously with bronchogenic carcinoma and multiple distant metastases.

关键词： scleroderma bronchogenic carcinoma metastasis.

Microwave Preparation of SiO2-B2O3-Na2O-K2O-CaO-Fe2O3-TiO2 Glass System

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Journal of Chemistry and Chemical Engineering 2014年第4期8卷 349-357页

作者： Ashis Kumar Manda Prasanta Kumar Sinha Santanu Sen Sitendu Mondal Chandan guha Ranjan Sen CSIR-Central Glass and Ceramic Research Institute Kolkata 700032 India Department of Chemical Engineering Jadavpur Unirversity Kolkata 700032 India

This study reports preparation of glass composition （54.50 wt.%） SiO2, （10.80 wt.%） B2O3, （14.20 wt.%） Na2O, （1.20 wt.%） K2O, （6.00 wt.%） CaO, （4.00 wt.%） Fe2O3 and （9.30 wt.%） TiO2 by melt quenching method using direct microwave heating and conventional resistive heating. Study of dielectric loss factor of the glass as function of temperature illustrated increasing loss factor above 370 ℃, 550 ℃, 650 ℃ and 900 ℃, indicating enhanced microwave absorption by the glass at above these temperatures. Chemical analysis results of both the glasses depicted more volatilization loss of volatile ingredients in conventional heating. The study of chemical durability was performed from leachate analysis describing less leaching of Na2O, K2O and other constituents from glass melted in microwave furnace. Glass transition temperatures （Tg） were found to be 576.3 ℃ and 569.5 ℃ for glass melted in conventional and microwave heating route, respectively. Laboratory experiment of glass melting utilizing microwave energy as an alternate heating source demonstrated 70%-75% electrical power saving.

关键词： Microwave heating energy efficient glass melting dielectric constant loss factor chemical durability.

化学信息学在化学品风险评估优先度排序中的应用:以IARC农药专刊为例(续完)

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环境与职业医学 2017年第6期34卷 566-570页

作者：季麟金泰廙 guha N Guyton K Z Loomis D 机构不详

3结果3．1创建文献挖掘的农药总列表根据政府数据库、知识奉体（ontologies）和提供化学乩毒理学数据的数据库，创建一张包含近6000种农药化合物的总列表，其范同涵盖KEGG（916种农药）、MeSH农药（451种农药）、ChEBI（2448种农药）、

关键词：化学品化学信息学农药 IARC 风险评估应用排序数据库