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Boronic acid-containing diarylpyrimidine derivatives as novel HIV-1NNRTIs: Design, synthesis and biological evaluation

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Chinese Chemical Letters 2021年第12期32卷 4053-4057页

作者： Da Feng Fenju Wei Yanying Sun prem prakash Sharma Tao Zhang Hao Lin Brijesh Rathi Erik De Clercq Christophe Pannecouque Dongwei Kang Peng Zhan Xinyong Liu Department of Medicinal Chemistry Key Laboratory of Chemical Biology(Ministry of Education)School of Pharmaceutical SciencesCheeloo College of MedicineShandong UniversityJi'nan 250012China Laboratory for Translational Chemistry and Drug Discovery Department of ChemistryHansraj CollegeUniversity of DelhiDelhi 110007India Rega Institute for Medical Research Laboratory of Virology and ChemotherapyK.U.LeuvenLeuven B-3000Belgium China-Belgium Collaborative Research Center for Innovative Antiviral Drugs of Shandong Province Ji'nan 250012China Suzhou Research Institute Shandong UniversitySuzhou 215123China

Drug resistance remains to be a serious problem with type Ⅰ human immunodeficiency virus(HIV-1) nonnucleoside reverse transcriptase inhibitors(NNRTIs). A series of novel boronic acid-containing diarylpyrimidine(DAPY) derivatives were designed via bioisosterism and scaffold-hopping strategies,taking advantage of the ability of a boronic acid group to form multiple hydrogen bonds. The target compounds were synthesized and evaluated for their anti-HIV activities and cytotoxicity in MT-4 *** 10 j yielded the most potent activity and turned out to be a single-digit nanomolar inhibitor towards the HIV-1 ⅢB [wild-type(WT) strain], L100 I and K103 N strains, with 50% effective concentration(EC_(50)) values of 7.19–9.85 nmol/L. Moreover, 10 j inhibited the double-mutant strain RES056 with an EC_(50) value of 77.9 nmol/L, which was 3.3-more potent than that of EFV(EC_(50)= 260 nmol/L) and comparable to that of ETR(EC_(50)= 32.2 nmol/L). 10j acted like classical NNRTIs with high affinity for WT HIV-1 reverse transcriptase(RT) with 50% inhibition concentration(IC_(50)) value of 0.1837 μmol/L. Furthermore,molecular dynamics simulation indicated that 10 j was proposed as a promising molecule for fighting against HIV-1 infection through inhibiting RT activity. Overall, the results demonstrated that 10 j could serve as a lead molecule for further modification to address virus-drug resistance.

关键词： HIV-1 NNRTIs NNIBP DAPY Boronic acid Molecular dynamics simulation

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Calibration of HEC-RAS Model on Prediction of Flood for Lower Tapi River, India

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Journal of Water Resource and Protection 2011年第11期3卷 805-811页

作者： Prafulkumar V. Timbadiya prem Lal Patel prakash D. Porey 不详

Channel roughness is a sensitive parameter in development of hydraulic model for flood forecasting and flood inundation mapping. The requirement of multiple channel roughness coefficient Mannnig’s ‘n’ values along the river has been spelled out through simulation of floods, using HEC-RAS, for years 1998 and 2003, supported with the photographs of river reaches collected during the field visit of the lower Tapi River. The calibrated model, in terms of channel roughness, has been used to simulate the flood for year 2006 in the river. The performance of the calibrated HEC-RAS based model has been accessed by capturing the flood peaks of observed and simulated floods;and computation of root mean squared error (RMSE) for the intermediated gauging stations on the lower Tapi River.

关键词： Hydrodynamic Model Calibration Simulation Flood and Stage Hydrograph Validation HEC-RAS

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Bacteriocins as antimicrobial and preservative agents in food:Biosynthesis,separation and application

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Food Bioscience 2022年第2期46卷 749-771页

作者： Deepak Kumar Verma Mamta Thakur Smita Singh Soubhagya Tripathy Alok Kumar Gupta Deepika Baranwal Ami R.Patel Nihir Shah Gemilang Lara Utama Alaa Kareem Niamah M´onica L.Ch´avez-Gonz´alez Carolina Flores Gallegos Cristobal Noe Aguilar prem prakash Srivastav Agricultural and Food Engineering Department Indian Institute of Technology KharagpurKharagpur721302West BengalIndia Department of Food Technology School of SciencesITM UniversityGwalior474001Madhya PradeshIndia Department of Nutrition and Dietetics University Institute of Applied Health SciencesChandigarh UniversityChandigarh140413PunjabIndia Division of Post-harvest Management ICAR-Central Institute for Subtropical Horticulture(Ministry of Agriculture and Farmers WelfareGovernment.of India)Lucknow(UP)226101India Department of Home Science Arya Mahila PG CollegeBanaras Hindu UniversityVaranasiUttar Pradesh221005India Division of Dairy Microbiology Mansinhbhai Institute of Dairy and Food Technology-MIDFTDudhsagar Dairy CampusMehsana384002GujaratIndia Faculty of Agro-Industrial Technology Universitas PadjadjaranSumedang45363Indonesia Center for Environment and Sustainability Science Universitas PadjadjaranBandung40132Indonesia Department of Food Science College of AgricultureUniversity of BasrahBasra CityIraq Bioprocesses and Bioproducts Research Group and Nanobioscience Group.Food Research Department School of Chemistry.Autonomous University of CoahuilaSaltillo Campus25280CoahuilaMexico

Emerging evidence shows the trend of using safe and natural preservatives like bacteriocins in food *** increasing demand by the food industry to extend keeping quality and prevent spoilage of various food products has appealed for new preservatives and new methods of ***,to discover the novel spectrum of antimicrobial compounds that could effectively battle food-borne pathogens,bacteriocins have been intensively studied in the last few ***,great attention has been paid to the application of lactic acid-bacterial bacteriocins targeting food spoilage-causing or pathogenic microorganisms with no significant side *** mechanisms of action like pore-formation,retarding cell-wall/nucleic acid/protein synthesis have been proposed and described for diverse ***,the syntheses,purification of bacteriocins in addition to their applications as antimicrobial and preservative agents in food processing are reviewed in *** review will also discuss the preservative effect of bacteriocins and their combinations having multiple modes of action(hurdle approach)to reduce the microbial load as well as antimicrobial resistance.

关键词： Lactic acid bacteria Bacteriocins Preservative Food-borne pathogens Food processing

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印度北部污染物对雨水中PH值的长期影响

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江苏环境科技 1993年第4期6卷 45-48页

作者： L.T.Khemani G.A.Momin P.S.Prakasa Rao P.D.Safai G.Singh R.N.Chatterjee prem prakash 刘育民聂明浩陆贞芝南京大学环科所南京市环境监测中心站

在阿格拉和德里1963年与1965年夏季季风期间收集的雨水样品中的离子成份和 PH 值同这两个城市在1984年夏天季风期间所收集到的雨水样品分别进行比较,发现阿格拉和德里在二十年之后 PH 值分别降低2.8(9.1—6.3)和0.9(7.0—6.1),此期间两... 详细信息

在阿格拉和德里1963年与1965年夏季季风期间收集的雨水样品中的离子成份和 PH 值同这两个城市在1984年夏天季风期间所收集到的雨水样品分别进行比较,发现阿格拉和德里在二十年之后 PH 值分别降低2.8(9.1—6.3)和0.9(7.0—6.1),此期间两城市的工业化有了很大的发展。PH 值降低的主要原因是雨水中酸性成份大大增加,来自土壤的成份减少了。这是在印度第一次观察到污染物对雨水 PH 值的长期影响,但是这种影响与西方国家相比是比较慢的。

关键词：雨水酸雨污染物印度北方 PH值样品

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