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Solid and liquid state characterization of tetrahydrocurcumin using XRPD, FT-IR, DSC, TGA, LC-MS, GC-MS, and NMR and its biological activities

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Journal of Pharmaceutical Analysis 2020年第4期10卷 334-345页

作者： Mahendra Kumar trivedi Parthasarathi Panda Kalyan Kumar Sethi Mayank Gangwar Sambhu Charan Mondal Snehasis Jana trivedi global Inc. Henderson89052NevadaUSA trivedi Science Research Laboratory Pvt.Ltd. Thane(W)-400604MaharashtraIndia

Tetrahydrocurcumin(THC)is one of the major metabolites of curcumin(CUR),an ancient bioactive natural polyphenolic *** research article describes both the solid and liquid state characterization of THC using advanced spectroscopic and thermo-analytical ***-inflammatory,anti-oxidant,and neuroprotective activities of THC were investigated using in vitro cell *** chromatography-mass spectrometry analysis revealed that our sample comprised 95.15%THC,0.51%tetrahydrodemethoxycurcumin(THDC),3.40%hexahydrocurcumin,and 0.94%*** chromatography-mass spectrometry analysis indicated the presence of 96.68%THC and 3.32%*** in solution existed as keto-enol tautomers in three different forms at different retention time,but the enol form was found to be dominant,which was also supported by nuclear magnetic resonance *** was thermally stable up to 335.55*** exhibited more suppression of cytokines(TNF-a,IL-1b,and MIP-1a)than CUR in a concentration-dependent manner in mouse splenocytes,while NK-cell and phagocytosis activity was increased in *** showed a significant reduction of free radicals(LPO)along with improved antioxidant enzymes(SOD and catalase)and increased free radical scavenging activity against ABTSt radicals in HepG2 *** displayed higher protection capability than CUR from oxidative stress and neuronal damage by improving cell viability against H2O2 induced HepG2 cells and MPPt induced SH-SY5Y cells,respectively,in a concentration-dependent ***,a variation of the biological activities of THC might rely on its keto-enol form and the presence of other THC analogs as *** present study could be advantageous for further research on THC for better understanding its physicochemical properties and biological variation.

关键词： Tetrahydrocurcumin Liquid chromatography-mass spectrometry Spectroscopic and thermal analysis Keto-enol tautomer Anti-inflammatory Antioxidant

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High-temperature oxidation behavior and degradation mechanism of chromium-coated zirconium alloy cladding: a review

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Tungsten 2025年第1期7卷 50-70页

作者： Yi Li Bei-Qi Wang Xin-Yin Zhang Shi-Jie Wang Cong-Yi Li Hui-Long Yang Ran-Ran Su Tong Liu School of Mechanical Engineering Shanghai Jiao Tong University College and Graduate School of Arts and Sciences University of Virginia global Institute of Future Technology Shanghai Jiao Tong University

Accident-tolerant fuels(ATF) have been extensively studied to reduce the production rate and total amount of heat and hydrogen generated from high-temperature steam oxidation during severe ***-coated zirconium alloy cladding has become one of the most promising candidates for ATF because of its excellent corrosion and oxidation *** paper provides a comprehensive overview of the research progress on oxidation behaviors and degradation mechanisms in chromium-coated zirconium alloy cladding under high-temperature *** techniques to strengthen the oxidation resistance are highlighted and ***,challenges and opportunities for various future directions are addressed.

关键词： Accident-tolerant fuel Chromium coating Degradation mechanism High-temperature oxidation behavior Zirconium alloy cladding

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In-depth investigation on physicochemical and thermal properties of magnesium(Ⅱ) gluconate using spectroscopic and thermoanalytical techniques

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Journal of Pharmaceutical Analysis 2017年第5期7卷 332-337页

作者： Mahendra Kumar trivedi Neena Dixit Parthasarathi Panda Kalyan Kumar Sethi Snehasis Jana trivedi global Inc. National Institute of Technology trivedi Science Research Laboratory Pvt.Ltd.

Magnesium gluconate is a classical organometallic pharmaceutical compound used for the prevention and treatment of hypomagnesemia as a source of magnesium ion. The present research described the in-depth study on solid state properties viz. physicochemical and thermal properties of magnesium gluconate using sophisticated analytical techniques like Powder X-ray diffraction(PXRD), particle size analysis(PSA),Fourier transform infrared(FT-IR) spectrometry, ultraviolet–visible(UV–Vis) spectroscopy, thermogravimetric analysis(TGA)/differential thermogravimetric analysis(DTG), and differential scanning calorimetry(DSC).Magnesium gluconate was found to be crystalline in nature along with the crystallite size ranging from 14.10 to47.35 nm. The particle size distribution was at d(0.1)=6.552 μm, d(0.5)=38.299 μm, d(0.9)=173.712 μm and D(4,3)=67.122 μm along with the specific surface area of 0.372 m^2/g. The wavelength for the maximum absorbance was at 198.0 nm. Magnesium gluconate exhibited 88.51% weight loss with three stages of thermal degradation process up to 895.18 °C from room temperature. The TGA/DTG thermograms of the analyte indicated that magnesium gluconate was thermally stable up to around 165 °C. Consequently, the melting temperature of magnesium gluconate was found to be 169.90 °C along with the enthalpy of fusion of 308.7 J/***, the authors conclude that the achieved results from this study are very useful in pharmaceutical and nutraceutical industries for the identification, characterization and qualitative analysis of magnesium gluconate for preformulation studies and also for developing magnesium gluconate based novel formulation.

关键词： Magnesium gluconate Solid state properties Particle size analysis Thermal analysis Spectroscopic analysis

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Time to treat the climate and nature crisis as one in divisible global health emergency

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General Psychiatry 2023年第5期36卷 440-442页

作者： Chris Zielinski Centre for global Health University of WinchesterWinchesterUK

Over 200 health journals call on the United Nations(UN),political leaders and health professionals to recognise that climate change and biodiversity loss are one indivisible crisis and must be tackled together to pres... 详细信息

关键词： catastrophe global preserve

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China CDC Weekly--A Step Forward for China’s Public Health System and for global Health Security

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China CDC weekly 2019年第2期1卷 19-20页

作者： Ron Moolenaar RJ Simonds Division of global Health Protection Center for Global HealthU.S.CDC Center for global Health U.S.CDC Country Director US CDC China

Congratulations to China CDC on the launch of the China CDC *** timely,accurate reporting on public health surveillance,epidemiologic investigations,and emergency responses,and by sharing lessons learned and evidence-... 详细信息

关键词： CDC Forward Public

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Time to treat the climate and nature crisis as one indivisible global health emergency

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Stroke & Vascular Neurology 2024年第4期9卷 325-327页

作者： Chris Zielinski on behalf of the authorship group listed below Centre for global Health University of WinchesterWinchesterUK 不详

关键词： preserve global divisible

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After Liberal global Democracy:New Methodology for New Praxis

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Fudan Journal of the Humanities and Social Sciences 2020年第1期13卷 67-92页

作者： Jan Aart Scholte School of global Studies University of GothenburgGothenburgSweden Centre for global Cooperation Research University of Duisburg-EssenDuisburgGermany

Liberalism is in trouble as a normative basis of world order,partly for its failure to deliver adequate democracy to contemporary *** article explores how new ideas and practices of democracy might underpin a future post-liberal world *** discussion especially addresses methodological issues,on the premise that the way that global democracy is studied deeply affects the ways that it can be understood and *** open space for more innovative thinking about people's power in a global world,the article develops an approach which—in contrast to established liberal theorising-mphasises principles of diversity,reflexivity,and *** on experiences of implementing these principles in a six-year'Building global Democracy' programme,the article argues that such a method-ology can generate different,imaginative and transformative *** particular,post-liberal reinventions of democracy could redefine the demos,incorporate non-modern institutions,deepen justice,and confront structural power *** be sure,as the final section reflects,the formulation and implementation of post-liberal constructions of global democracy face considerable ***,with no less than the future of a good society at stake,it is vital further to pursue such experiments in globality beyond liberalism.

关键词： Democracy global democracy globalization Anti-globalization Liberalism Neoliberalism

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Application and research of global grid database design based on geographic information

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global Energy Interconnection 2018年第1期1卷 87-95页

作者： Xuming Liang global Energy Interconnection Development and Cooperation Organization

Energy crisis and climate change have become two seriously concerned issues universally. As a feasible solution, global Energy Interconnection(GEI) has been highly praised and positively responded by the international community once proposed by China. From strategic conception to implementation, GEI development has entered a new phase of joint action now. Gathering and building a global grid database is a prerequisite for conducting research on GEI. Based on the requirement of global grid data management and application, combining with big data and geographic information technology, this paper studies the global grid data acquisition and analysis process, sorts out and designs the global grid database structure supporting GEI research, and builds a global grid database system.

关键词： Big data collection Geographic information Grid database Data mining

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Solution‑Processed Thin Film Transparent Photovoltaics:Present Challenges and Future Development

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Nano-Micro Letters 2025年第2期17卷 566-600页

作者： Tianle Liu Munerah M.S.Almutairi Jie Ma Aisling Stewart Zhaohui Xing Mengxia Liu Bo Hou Yuljae Cho UM-SJTU Joint Institute Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of Physics and Astronomy Cardiff UniversityCardiff CF243AAWalesUK Department of Electrical and Computer Engineering Yale UniversityNew HavenCT 06511USA Energy Sciences Institute Yale UniversityWest HavenCT 06516USA Future Photovoltaics Research Center Global Institute of Future TechnologyShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Electrical energy is essential for modern society to sustain economic *** soaring demand for the electrical energy,together with an awareness of the environmental impact of fossil fuels,has been driving a shift towards the utilization of solar ***,traditional solar energy solutions often require extensive spaces for a panel installation,limiting their practicality in a dense urban *** overcome the spatial constraint,researchers have developed transparent photovoltaics(TPV),enabling windows and facades in vehicles and buildings to generate electric *** TPV advancements are focused on improving both transparency and power output to rival commercially available silicon solar *** this review,we first briefly introduce wavelength-and non-wavelengthselective strategies to achieve *** of merit and theoretical limits of TPVs are discussed to comprehensively understand the status of current TPV *** we highlight recent progress in different types of TPVs,with a particular focus on solution-processed thin-film photovoltaics(PVs),including colloidal quantum dot PVs,metal halide perovskite PVs and organic *** applications of TPVs are also reviewed,with emphasis on agrivoltaics,smart windows and ***,current challenges and future opportunities in TPV research are pointed out.

关键词： Transparent semiconductors Solution-processable transparent solar cell Emerging solar cell materials Buildingintegrated photovoltaics

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Bergman kernel and complex singularity exponent

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Science China Mathematics 2009年第12期52卷 2590-2603页

作者： LEE HanJin global Leadership School Handong Global University

We give a precise estimate of the Bergman kernel for the model domain defined by Ω F = “(z,w) ∈ ? n+1: Im w ? |F(z)|2 > 0”, where F = (f 1, ..., f m ) is a holomorphic map from ? n to ? m , in terms of the complex... 详细信息

关键词： Bergman kernel complex singularity exponent model domain 32A25

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