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Insight into solute-solute and solute-solvent interactions of semicarbazide hydrochloride in water and D-glucose/D-sucrose+water solutions at temperatures(293.15 to 318.15)K

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Chinese Journal of Chemical Engineering 2020年第12期28卷 3086-3095页

作者： Ankita dinesh chand Anil Kumar Nain Department of Chemistry Dyal Singh CollegeUniversity of DelhiNew Delhi 110003India Department of Chemistry University of DelhiDelhi 110007India Department of Chemistry Amity University Dubai CampusDubai International Academic CityDubaiUAE

The solute-solute and solute-solvent interactions of drug semicarbazide hydrochloride with carbohydrates(Dglucose/D-sucrose)are investigated by using volumetric,viscometric and acoustic *** measurements of the densitiesρ,ultrasonic speeds u,and viscositiesη.of semicarbazide hydrochloride in 5% and 10%D-glucose/D-sucrose+water(w/w)solutions were carried out at temperatures(293.15-318.15)K and at pressure,p=101 *** apparent molar volumes,Vϕ,limiting apparent molar volumes,V°ϕ,apparent molar compressibilities,Ks,ϕ,limiting apparent molar compressibilities,K°s;ϕ,partial molar expansibilities,E°ϕ,transfer volumes,V°ϕ;tr and transfer compressibilities,K°s;ϕ;tr have been calculated from the experimental *** viscosity data were examined by using the Jones-Dole equation and the viscosity A and B coefficients were *** results are discussed in terms of solute-solute and solute-solvent interactions in these *** structure making/breaking ability of semicarbazide hydrochloride is examined using the sign of temperature derivative of Bcoefficient,dB/dT.

关键词： Density Ultrasonic speed Viscosity Semicarbazide hydrochloride Carbohydrates Solute-solvent interactions

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加强制浆生产管理提高纸浆产量与质量

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中国造纸 2010年第6期29卷 68-70页

作者： dinesh chand Mohta 张家喜巴克曼实验室化工(上海)有限公司上海201707

大多数制浆企业的操作工艺与设备或工艺厂家提供的工艺都会出现很大偏离,甚至在工艺和原料相同的两条制浆线上产量与品质都相差较大。文章分析了产生这种现象的原因,介绍了制浆生产中提高生产管理水平,增加产量、改善产品品质的一些经验。

关键词：木片质量制浆生产树脂控制二氯甲烷抽提物结垢控制

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Viscosities and ultrasonic speeds of binary mixtures of benzene with triethylamine and tributylamine at different temperatures:An experimental and theoretical study

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Chinese Journal of Acoustics 2009年第3期28卷 193-208页

作者： Anwar Ali Firdosa Nabi dinesh chand Anil Kumar Nain Nizamul Haque Ansari Department of Chemistry Jamia Millia Islamia(Central University)New Delhi 110025 India Department of Chemistry Jamia Millia Islamia(Central University) New Delhi 110025 India Department of Chemistry Amity School of EngineeringSuper Expressway Noida-201301U.P.India Department of Chemistry Dayal Singh CollegeDelhi University New Delhi 110003 India

The viscosities, η, and ultrasonic speeds, u, of pure benzene, triethylamine, （TEA） tributylamine, （TBA）, and those of their binary mixtures, with benzene as common component, covering the whole composition range have been measured at 278.15 K, 283.15 K, 288.15 K, 293.15 K, 298.15 K, 303.15 K, 308.15 K, 313.15 K, and 318.15 K. From the experimental data the deviations in viscosity, △η, deviations in Gibbs free energy, AG, deviations in ultrasonic speed, △u, deviations in entropies, △S^＊, and deviations in enthalpies, △H^＊, of activation of viscous flow have been determined. The sign and magnitude of these parameters were found to be sensitive towards interactions prevailing in the studied systems. Further, the excess molar volumes, VE, were calculated using data for the binary mixtures. Moreover, theoretical values of viscosities and ultrasonic speeds of the binary mixtures were calculated using different empirical relations and theories. The results were in experimental and theoretical values. discussed in terms of average deviations （AD）

关键词： Viscosities and ultrasonic speeds of binary mixtures of benzene with triethylamine and tributylamine at different temperatures

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Comparison of Sensitivity and Specificity of ZN and Fluorescent Stain Microscopy with Culture as Gold Standard

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Journal of Tuberculosis Research 2017年第2期5卷 118-128页

作者： Rekha Bansal Parveen Kumar Sharma Subhash chand Jaryal Puneet Kumar Gupta dinesh Kumar Department of Pulmonary Medicine Dr. RP Government Medical College Kangra at Tanda (HP) India Department of Pharmacology SLBS Government Medical College Mandi at Nerchowk (HP) India Department of Microbiology SLBS Government Medical College Mandi at Nerchowk (HP) India Department of Microbiology All India Institute of Medical Sciences Rishikesh Uttarakhand India Department of Community Medicine Dr. RP Government Medical College Kangra at Tanda (HP) India

Introduction: Reports indicate that fluorescent staining of smears increases sensitivity of direct microscopy;so ZN staining is being replaced with fluorescent microscopy in RNTCP in India. Chemical processing and sputum concentration may also improve sensitivity of microscopy. Objective: To compare the sensitivity and specificity of microscopy for AFB using ZN and fluorescent stains in direct and concentrated specimen with culture as gold standard. Methods: Morning sputum specimen of patients, suspected of having pulmonary tuberculosis, over a period of 6 months was subjected to direct microscopy using fluorescent stain;the same slide was over-stained with ZN stain. Same sputum sample was concentrated by Petroff’s method and subjected to fluorescent microscopy followed by ZN microscopy and finally to culture for AFB. Results: Sensitivity of fluorescent stained concentrated sputum samples was maximum and of ZN stained unprocessed sputum samples was minimum. Specificity of three of the methods was equal at 0.96 but of ZN stained concentrated sputum smears was 0.97. Sensitivity of total fluorescent stains was 0.85 (Specificity 0.96) and sensitivity of total ZN stained smears was 0.80 (Specificity 0.96). Discussion: We used same smear for fluorescent and ZN stains, so smear related variability is decreased. Blinding for microscopy was practically complete. Conclusion: The sensitivity of sputum microscopy for AFB can be increased by concentrating the sputum and using fluorescent microscopy. The specificity remains high in all the methods.

关键词： Sensitivity and Specificity Microscopy for AFB ZN Staining Fluorescent Stain Concentration of Sputum

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