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Journal of Renewable Materials 2019年第12期7卷 1279-1293页

作者： Narsimha Pandi Shirish h.Sonawane Sarang P.Gumfekar Anand Kishore Kola pramod h.borse Swapnil B.Ambade Sripadh Guptha Muthupandian Ashokkumar Department of Chemical Engineering National Institute of TechnologyWarangalTelanganaIndia Department of Chemical and Materials Engineering University of AlbertaEdmontonCanada International Advanced Research Centre for Powder Metallurgy and New Materials Balapur POHyderabadTelanganaIndia Department of Organic and Nano Engineering Hanyang University 222Wangsimni-roSeongdong-guSeoulKorea Department of Chemistry University of MelbourneVictoriaAustralia.

The present study deals with the intensified synthesis of starch-polyaniline(starch-PANI)nanocomposite using an ultrasound-assisted *** is a key component in this nanocomposite,which acts as a backbone of the nucleation of *** Electrochemical property of the nanocomposite arises due to the addition of *** is one of green approach for the synthesis of bio nanocomposite using *** crystallinity of the composite is evaluated using the Scherrer *** starch-PANI nanocomposite was characterized by XRD,FT-IR,Raman,XPS and *** composite nanoparticles show spherical *** elemental composition of starch-PANI showed O 1s peak at 546 eV,N 1s peak at 416 eV,C 1s peak at 286 eV and S 1s peak at 176 *** electrochemical studies of the starch-PANI electrodes are evaluated by cyclic voltammetry(CV),galvanostatic charge/discharge(GCD),and electrochemical impedance spectroscopy(EIS).Starch-PANI electrode has shown the maximum specific capacitance of 499.5 F/g at 5 mV/s scan rate.

关键词： Starch polyaniline sonochemical synthesis ultrasound biocomposite electrochemical analysis supercapacitor

Sulfamic acid as a green,reusable catalyst for stepwise,tandem&one-pot solvent-free synthesis of pyrazole derivatives

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Chinese Chemical Letters 2017年第7期28卷 1571-1576页

作者： Veera Swamy Konkala pramod Kumar Dubey Department of Chemistry Jawaharlal Nehru Technological University HyderabadCollege of EngineeringKukatpally 500085India

Sulfamic acid（SA） is a bi-functional, cost-effective and reusable green catalyst for the synthesis of 4-（pyrazol-4-yl）methylenepyrazol-5（4h）-one derivatives by one-pot, three-component condensation of pyrazol-4-carbaxaldehydes, b-ketoesters and phenyl hydrazine（Route-I）. In addition to this method,another simple condensation of pyrazol-4-carbaxaldehydes with pyrazolone in the presence of SA under the solvent-free condition in good yield is reported. The merits of these protocols are mild conditions,non-aqueous workup, high yields, easy availability of the catalyst, no chromatographic separation and inexpensive solid acid catalyst. Furthermore, SA could be recycled and reused for five times without losing its catalytic activity.

关键词： Pyrazol-4-carbaxaldehydes Knoevenagel condensation Sulfamic acid Multicomponent reaction Physical grinding

Effect of benzaldehyde on the electrodeposition and corrosion properties of Ni–W alloys

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International Journal of Minerals,Metallurgy and Materials 2015年第10期22卷 1060-1066页

作者： U.pramod Kumar C.Joseph Kennady Department of Chemistry Karunya Institute of Technology and SciencesKarunya NagarCoimbatore 641114Tamil NaduIndia

The effect of different concentrations of benzaldehyde on the electrodeposition of Ni–W alloy coatings on a mild steel substrate from a citrate electrolyte was investigated in this study. The electrolytic alkaline bath(p h 8.0) contained stoichiometric amounts of nickel sulfate, sodium tungstate, and trisodium citrate as precursors. The corrosion resistance of the Ni–W-alloy-coated specimens in 0.2 mol/L h2SO4 was studied using various electrochemical techniques. Tafel polarization studies reveal that the alloy coatings obtained from the bath containing 50 ppm benzaldehyde exhibit a protection efficiency of 95.33%. The corrosion rate also decreases by 21.5 times compared with that of the blank. A higher charge-transfer resistance of 1159.40 ?·cm2 and a lower double-layer capacitance of 29.4 μF·cm-2 further confirm the better corrosion resistance of the alloy coating. X-ray diffraction studies reveal that the deposits on the mild steel surface are consisted of nanocrystals. A lower surface roughness value(Rmax) of the deposits is confirmed by atomic force microscopy.

关键词： nickel–tungsten alloys benzaldehyde electrodeposit

Gut-liver axis improves with meloxicam treatment after cirrhotic liver resection

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World Journal of Gastroenterology 2014年第40期20卷 14841-14854页

作者： Astrit R hamza Avdyl S Krasniqi pramod Kadaba Srinivasan Mamdouh Afify Christian Bleilevens Uwe Klinge René h Tolba Institute for Laboratory Animal Science and Experimental Surgery University Hospital Rheinisch-Westf?lische Technische Hochschule Aachen 52074 Aachen Germany Department of AbdominalSurgery University Clinical Center of Kosova Prishtina 10000Kosovo Department of Anesthesiology University Hospital Rheinisch-Westf?lische Technische Hochschule Aachen 52074 Aachen Germany Department of Surgery University Hospital Rheinisch-Westf?lische Technische Hochschule Aachen 52074 Aachen Germany

AIM: To investigate the effect of meloxicam on the gut-liver axis after cirrhotic liver resection.

关键词： Liver cirrhosis Liver resection Gut-liver axis Meloxicam Cyclooxigenase-2 Microcirculation

Synthesis,isolation,identification and characterization of new process-related impurity in isoproterenol hydrochloride by hPLC,LC/ESI-MS and NMR

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Journal of Pharmaceutical Analysis 2017年第6期7卷 394-400页

作者： Neeraj Kumar Subba Rao Devineni Prasad Reddy Gajjala Shailendra Kumar Dubey pramod Kumar Chemical Research Department Micro Labs LtdAPI DivisionBommasandra-Jigani Link RoadKIADB INDL AreaBommasandraBangalore 560105KarnatakaIndia

One unknown impurity （Imp-II） during the analysis of laboratory batches of isoproterenol hydrochloride was detected in the level ranging from 0.04% to 0.12% by high performance liquid chromatography with UV detection. The unknown impurity structure was proposed as 4-[2-（propan-2oylamino）ethyl]benzene-l,2-diol （Imp-II） using the liquid chromatography-mass spectrophotometry （LC-MS） analysis. Imp-II was isolated by semi-preparative liquid chromatography from the impurity-enriched reaction crude sample. Its proposed structure was confirmed by nuclear magnetic spectroscopy such as 1h, 13C, DEPT （1D NMR）, hSQC （2D NMR） and infrared spectroscopy （IR）, and retention time and purity with hPLC followed by the chemical synthesis. Due to less removable nature of Imp-II during the purification, the synthetic process was optimized proficiently to control the formation of Imp-II below to the limit 〈 0.12% in the course of reaction. The new chemical route was developed for the preparation of this impurity in required quantity with purity to use as reference standard. The most probable mechanism for the formation of Imp-II was discussed in details.

关键词： Isoproterenol hydrochloride Impurities hPLC NMR

On the reality of broad iron L lines from the narrow line Seyfert 1 galaxies 1h0707–495 and IRAS 13224–3809

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Research in Astronomy and Astrophysics 2016年第11期16卷 37-42页

作者： pramod Karbhari Pawar Gulab Chand Dewangan Madhav Khushalrao Patil Ranjeev Misra Sharada Keshav Jogadand S. R. T. M. University Nanded- 431 606 India Inter-University Center for Astronomy and Astrophysics Pune - 411 007 India

We performed time resolved spectroscopy of 1h0707-495 and IRAS 13224-3809 using long XMM-Newton observations. These are strongly variable narrow line Seyfert 1 galaxies and show broad features around 1 keV that have been interpreted as relativistically broad Fe Lc~ lines. Such features are not clearly observed in other active galactic nuclei despite sometimes having high iron abundance required by the best fitted blurred reflection models. Given the importance of these lines, we explore whether the rapid variability of spectral parameters may introduce broad bumps/dips artificially in the time averaged spectrum, which may then be mistaken as broadened lines. We tested this hypothesis by performing time resolved spectroscopy using long （〉 100 ks） XMM-Newton observations and by dividing them into segments with typical exposures of a few ks. We extracted spectra from each such segment and modeled them using a two component phenomenological model consisting of a power law to represent the hard component and a black body to represent the soft emission. As expected, both the sources showed variations in the spectral parameters. Using these variation trends, we simulated model spectra for each segment and then co-added to get a combined simulated spectrum. In the simulated spectra, we found no broad features below 1 keV and in particular no deviation near 0.9 keV as seen in the real averaged spectra. This implies that the broad Fe Lα line that is seen in the spectra of these sources is not an artifact of the variation of spectral components and, hence, provides evidence that the line is indeed genuine.

关键词： galaxies: general -- galaxies: active -- galaxies: individual (1h0707-495 IRAS 13224-3809)

Nitrosamines crisis in pharmaceuticals-Insights on toxicological implications,root causes and risk assessment:A systematic review

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Journal of Pharmaceutical Analysis 2024年第5期14卷 639-652页

作者： hemanth P.R.Vikram Tegginamath pramod Kumar Gunjan Kumar Narasimha M.Beeraka Rajashree Deka Sheik Mohammed Suhail Sandeep Jat Namitha Bannimath Gayatiri Padmanabhan Ravandur S.Chandan pramod Kumar Bannimath Gurupadayya Department of Pharmaceutical Chemistry JSS College of Pharmacy MysuruJSS Academy of Higher Education and Research(JSSAHER)Mysuru570015India Xenone healthcare Pvt.Ltd. New Delhi110076India Department of Pharmaceutics JSS College of Pharmacy MysuruJSS Academy of Higher Education and Research(JSSAHER)Mysuru570015India Department of human Anatomy I.M.Sechenov First Moscow State Medical University(Sechenov University)Moscow119991Russian Federation Department of Pharmacology Raghavendra Institute of Pharmaceutical Education and Research(RIPER)Ananthapuramu515721India herman B.Wells Center for Pediatric Research Department of PediatricsIndiana University School of MedicineIndianapolisIN46202USA Animal Physiology and Biochemistry Laboratory Department of ZoologyGauhati UniversityGuwahati781014India Department of Pharmacology JSS College of Pharmacy MysuruJSS Academy of Higher Education and Research(JSSAHER)Mysuru570015India Department of Pharmaceutical Analysis National Institute of Pharmaceutical Education and Research(NIPER)-GuwahatiChangsari781101India Department of Pharmacology University of GalwayGalwayH91 TK33Ireland

The presence of N-nitroso compounds,particularly N-nitrosamines,in pharmaceutical products has raised global safety concerns due to their significant genotoxic and mutagenic *** systematic review investigates their toxicity in active pharmaceutical ingredients(APIs),drug products,and pharmaceutical excipients,along with novel analytical strategies for detection,root cause analysis,reformulation strategies,and regulatory guidelines for *** review emphasizes the molecular toxicity of N-nitroso compounds,focusing on genotoxic,mutagenic,carcinogenic,and other physiological ***,it addresses the ongoing nitrosamine crisis,the development of nitrosamine-free products,and the importance of sensitive detection methods and precise risk *** comprehensive overview will aid molecular biologists,analytical scientists,formulation scientists in research and development sector,and researchers involved in management of nitrosamine-induced toxicity and promoting safer pharmaceutical products.

关键词： Carcinogenicity Genotoxicity Mutagenicity Molecular toxicity Nitrosamine impurities Nitrosamine drug substance-related impurities

Analog and radio-frequency performance analysis of silicon-nanotube MOSFETs

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Journal of Semiconductors 2016年第6期37卷 60-63页

作者： pramod kumar tiwari mukesh kumar ramavathu sakru naik gopi krishna saramekala Department of Electronics and Communication Engineering National Institute of TechnologyRourkela-769008OdishaIndia

This work presents a comparative study of the influence of various parameters on the analog and RF properties of silicon-nanotube MOSFETs and nanowire-based gate-all-around（GAA） *** important analog and RF performance parameters of SiNT FETs and GAA MOSFETs,namely drain current（/d）,transconductance to drain current ratio（g_m/I_d）,I_（on）/I_（off）,the cut-off frequency（f_T） and the maximum frequency of oscillation（/max） are evaluated with the help of Y- and h-parameters which are obtained from a 3-D device simulator,ATLAS^（TM）.It is found that the silicon-nanotube MOSFETs have far more superior analog and RF characteristics（g_m/I_d,f_T and /max） compared to the nanowire-based gate-all-around GAA *** silicon-nanotube MOSFET shows an improvement of ~2.5 and 3 times in the case of f_T and /max values respectively compared with the nanowire-based gate-all-around（GAA） MOSFET.

关键词： analog and RF SiNT MOSFETs GAA MOSFETs unity gain frequency unity power frequency

Optical Spectroscopy of Classical Be Stars in Old Open Clusters

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Research in Astronomy and Astrophysics 2023年第3期23卷 16-24页

作者： Madhu Kashyap Jagadeesh Blesson Mathew K.T.Paul Gourav Banerjee Suman Bhattacharyya R.Anusha pramod Kumar S. Department of Physics and Electronics CHRIST(Deemed to be University)Hosur Main RoadBengaluruIndia Department of Physics and Astronomy University of Western OntarioON N6A 3K7Canada Indian Institute of Astrophysics KoramangalaBengaluruIndia

We performed the optical spectroscopy of 16 classical Be stars in 11 open clusters older than 100 *** is the first spectroscopic study of classical Be stars in open clusters older than 100 *** found that the hαemission strength of most of the stars is less than 40?,in agreement with previous *** analysis further suggests that one of the stars,[KW97]35–12,might be a weak hαemitter in nature,showing hαequivalent width of-0.5?.Interestingly,we also found that the newly detected classical Be star LSⅢ+4737b might be a component of the possible visual binary system LSⅢ+4737,where the other companion is also a classical Be ***,the present study indicates the possible detection of a binary Be ***,it is observed that all 16 stars exhibit a lesser number of emission lines compared to classical Be stars younger than 100 ***,the spectral type distribution analysis of B-type and classical Be stars for the selected clusters points out that the existence of CBe stars can depend on the spectral type distribution of B-type stars present in these clusters.

关键词： clusters showing spectroscopic

Pathophysiology and Prevention of Paracentesis-induced Circulatory Dysfunction:A Concise Review

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Journal of Clinical and Translational hepatology 2020年第1期8卷 42-48页

作者： Anand V Kulkarni pramod Kumar Mithun Sharma T R Sowmya Rupjyoti Talukdar Padaki Nagaraj Rao D Nageshwar Reddy Department of hepatology Asian Institute of GastroenterologyHyderabadIndia Department of Gastroenterology Asian Institute of GastroenterologyHyderabadIndia

Annually,10%of cirrhotic patients with ascites develop refractory ascites for which large-volume paracentesis(LVP)is a frequently used therapeutic ***,although a safe method,is associated with circulatory dysfunction in a significant percentage of patients,which is termed para-centesis-induced circulatory dysfunction(PICD).PICD results in faster reaccumulation of ascites,hyponatremia,renal impairment,and shorter *** is diagnosed through laboratory results,with increases of>50%of baseline plasma renin activity to a value≥4 ng/mL/h on the fifth to sixth day after *** this review,we discuss the pathophysi-ology and prevention of PICD.

关键词： Refractory ascites Plasma renin activity Large-volume paracentesis Cirrhosis Portal hypertension