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Characterization of Black Carbon in the Ambient Air of Agra,India:Seasonal Variation and Meteorological Influence

Advances in Atmospheric Sciences 2017年第9期34卷 1082-1094页

作者： pratima gupta Shalendra Pratap SINGH Ashok JANGID Ranjit KUMAR Department of Chemistry Faculty of ScienceDayalbagh Educational Institute (Deemed University) Department of Physics and Computer Science Faculty of ScienceDayalbagh Educational Institute (Deemed University)

This study characterizes the black carbon in Agra, India home to the Taj Mahal--and situated in the lndo-Gangetic basin. The mean black carbon concentration is 9.5 μg m-3 and, owing to excessive biomass/fossil fuel combustion and automobile emissions, the concentration varies considerably. Seasonally, the black carbon mass concentration is highest in winter, probably due to the increased fossil fuel consumption for heating and cooking, apart from a low boundary layer. The nocturnal peak rises prominently in winter, when the use of domestic heating is excessive. Meanwhile, the concentration is lowest during the monsoon season because of the turbulent atmospheric conditions and the process of washout by precipitation. The ratio of black carbon to brown carbon is less than unity during the entire study period, except in winter （December）. This may be because that biomass combustion and diesel exhaust are major black carbon contributors in this region, while a higher ratio in winter may be due to the increased consumption of fossil fuel and wood for heating purposes. ANOVA reveals significant monthly variation in the concentration of black carbon; plus, it is negatively correlated with wind speed and temperature. A high black carbon mass concentration is observed at moderate （1-2 m s-1） wind speed, as compared to calm or turbulent atmospheric conditions.

关键词： black carbon aerosol seasonal variation diurnal variation meteorological parameter,

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Comparison of efficacy of metformin and D-chiro-inositol on clinical biomarkers in patients with polycystic ovarian syndrome:an open label study

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Global Health Journal 2023年第3期7卷 147-152页

作者： Gaurika Aggarwal Shikha gupta Ojus Sardana Harleen pratima Kumari Rupinder Kaur Thakur Gurjeet Singh Amit Sharma Ravinder Singh Neelam Hospital Near Chitkara UniversityRajpuraPunjab 140401India Department of Pharmacy Practice Chitkara College of PharmacyChitkara UniversityRajpuraPunjab 140401India Department of Pharmacy Practice ISF College of PharmacyMogaPunjab 142001India

Objective:Polycystic ovary syndrome(Pcos)is a pathophysiological disorder affecting reproductive and metabolic indices in *** present study was designed to compare the efficacy of metformin and D-chiroinositol in PcoS ***:In a tertiary care hospital in North India,prospective observational research was undertaken on 1o0 patients with PCOS,which was diagnosed based on European Society of Human Reproduction and Embryology Guidelines and ultrasound of lower *** study involves various clinical characteristics into consideration for the determination of statistical significance(P<0.05)in PCOS ***'s t-test along with the association between PCOS and patients taking metformin and D-chiro-inositol,as well as their impact on various biochemical parameters,were investigated finally using Pearson Correlation ***:This study comprises 50 patients taking metformin and 50 patients taking D-chiro-inositol in women suffering from *** mass index(BMI)and waist-to-hip ratio(WHR)were statistically significant(P<0.05)within the groups of both metformin and *** parameters such as luteinizing hormone(LH),follicle stimulating hormone(FSH),anti-mullerian hormone(AMH)and glycated hemoglobin(HbA1c)were found to be statistically significant(P<0.05)in both ***,FSH and AMH(14.40±0.52;14.28±0.53;1.99±0.10)were comparatively lower in patients taking D-chiro-inositol as compared to metformin group(14.17±0.42;19.88±1.01;2.61±0.04).HbA1c(3.71±0.08)with P<0.05 was found to be decreased more in metformin group as compared to patients taking D-chiro-inositol(4.90±0.09).A positive correlation was found between HbAlc and LH in metformin,&HbAlc and FSH in D-chiro-inositol groups,***:The results indicate that D-chiro-inositol shows better results in reducing clinical variables involved in causing PCOS as compared to metformin whereas metformin has better glycemic control in PCOS patients.

关键词： PCOS Metformin D-chiro-inositol HbA1c Correlation

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测定大气中苯的新方法

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世界环境 1985年第4期 20-21+17页

作者： pratima Verma V.K.gupta 唐棣

前言苯是毒性很强的芳香族化合物之一,它主要的制造方法是将石油中的轻质油催化重整。苯的工业用途主要是制备诸如聚合物、洗涤剂、农药以及化学工业和制药工业的中间产品等。苯也是发动机燃料油的组分之一(patty,1962)。苯的另一种主... 详细信息

前言苯是毒性很强的芳香族化合物之一,它主要的制造方法是将石油中的轻质油催化重整。苯的工业用途主要是制备诸如聚合物、洗涤剂、农药以及化学工业和制药工业的中间产品等。苯也是发动机燃料油的组分之一(patty,1962)。苯的另一种主要来源可能是动植物等生物物质。为研究苯的污染作用,人们希望找到一种灵敏的、选择性强的测定方法。目前最常用的仪器分析法是用火焰离子化鉴定器的气相色谱法、红外分光光度法和紫外分光光度法(Leithe,1975),这些方法都需要昂贵的仪器设备。常用的比色分析法有基于Janovsky

关键词：硝基苯偶氮染料间位

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用分光光度法测定空气中的甲醛

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新疆环境保护 1988年第3期 55-57页

作者： pratima Verma V.K.gupta 许孙曲印度印度

甲醛是来源于有机物质尤其是燃料部分氧化的最重要的空气污染物之一,它是汽车和飞机发动机排泄物的通常组份。不仅在焚烧炉的废气中而且在塑料、纺织和其它工业的流出物中都可发现它。甲醛会刺激粘膜并引起眼睛发炎。其临介极限值是3毫... 详细信息

甲醛是来源于有机物质尤其是燃料部分氧化的最重要的空气污染物之一,它是汽车和飞机发动机排泄物的通常组份。不仅在焚烧炉的废气中而且在塑料、纺织和其它工业的流出物中都可发现它。甲醛会刺激粘膜并引起眼睛发炎。其临介极限值是3毫克/米3,但在比此值更低时,甲醛就会产生刺激性。业已提出许多种试剂以使用分光光度法来测定空气中的甲醛,韦斯特与盖克曾提出一种利用副蔷薇苯胺和甲醛来测定二氧化硫

关键词：甲醛分光光度法二氧化硫脂肪族醛熏蒸剂工业气体空气硫酸盐溶液

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