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Food Production, Processing and Nutrition 2022年第1期4卷 366-382页

作者： Soumya Majumder Arindam Ghosh Sourav Chakraborty malay bhattacharya Molecular Biology and Tissue Culture Laboratory Department of Tea ScienceUniversity of North BengalSiliguriDarjeelingWest Bengal 734013India Postgraduate Department of Botany Darjeeling Government CollegeDarjeelingWest Bengal 734101India

A novel wine has been developed from Camellia japonica’s petal by fermenting the decoction with Saccharomyces cerevisiae or brewer’s yeast. pH, brix, specific gravity and alcohol percentage were tested to study the physicochemical properties of the wine. Qualitative tests indicated presence of phenols such as flavonoids, coumarins;protein;glyco-sides;glycerin;terpenoids;steroids;and fatty acids in the wine. Total phenol content was found high in the decoction and in its fermented form as well. In vitro biological activities such as antioxidant activity, antidiabetic activity and lipid peroxidation inhibition power were assessed in samples. Furthermore, GC-MS analysis helped to detect volatiles present in the unfermented decoction and understand the effect of fermentation on its changing metabolome while column chromatography assisted the separation of solvent-based fractions. Notable outcomes from this study were detection of bioactive compound quinic acid in the decoction and a proposed pathway of its metabolic breakdown after fermentation. Results of this research revealed biochemical and physicochemical acceptability of this wine prepared from an underutilized flower.

关键词： Camellia Quinic acid GC-MS Fermentation Wine

Production of fermented tea petal decoction with insights into in vitrobiochemical tests,antioxidant assay and GC-MS analysis

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Food Production, Processing and Nutrition 2021年第1期3卷 406-415页

作者： Soumya Majumder Sumedha Saha Arindam Ghosh Sukanya Acharyya Sahadeb Sarkar Sourav Chakraborty malay bhattacharya Molecular Biology and Tissue Culture Laboratory Department of Tea ScienceUniversity of North BengalSiliguriDarjeelingWest Bengal Pin-734013India

This research work was designed to attempt and propose the first report on production and biochemical characterization of fermented tea flower petal decoction or simply tea petal *** tea petal decoction and brewer’s yeast or Saccharomyces cerevisiae were co-cultured for *** activity and chromatographic separation of potential candidates were *** investigations for qualitative characters on this fermented broth revealed the presence of steroids,tannin,flavonoids,phenol,cardiac glycosides,coumarin,caffeine *** manufactured fermented broth showed high free radical scavenging activity after 2 months of *** DPPH scavenging activities were also observed in solvent fractions of acetone,ethanol and *** antioxidant activity,alcohol percentage and other qualities were seen to be gradually increased during *** chromatography-mass spectrometry analysis revealed the presence of 44 compounds including many potential antioxidant molecules and other bioactive ***,presence of alcohol with medicinally active compounds and antioxidant activity will make it as acceptable as a good wine and tea flower as economically functional.

关键词： Tea petal Antioxidant GC-MS Fermentation brewer’s yeast

Dupuytren’s disease:A review

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Chinese Journal of Plastic and Reconstructive Surgery 2024年第3期6卷 142-148页

作者： malay Sarkar Nitin Kashyap Irappa Madabhavi Department of Pulmonary Medicine Indira Gandhi Medical CollegeShimla 171001Himachal PradeshIndia Department of Plastic and Reconstructive Surgery Atal Institute of Medical SuperspecialitiesShimla 171001Himachal PradeshIndia Department of Medical and Pediatric Oncology and Hematology Jawaharlal Nehru Medical CollegeKLE Academy of Higher Education and ResearchBelagaviKarnataka 590010India

Dupuytren’s disease is a well-known benign fibroproliferative disorder that affects the palmar and digital fasciae of the *** spectrum includes nodule formation,cord formation,and flexion contracture of the digits,which may result in functional *** deformities are often progressive and *** is a cornerstone *** review discusses the epidemiology,pathophysiology,risk factors,clinical manifestations,and management of Dupuytren’s disease.

关键词： Dupuytren’s contracture Dupuytren’s disease Palmar aponeurosis Fasciectomy

COVID-19 mutations:An overview

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World Journal of Methodology 2024年第3期14卷 7-22页

作者： malay Sarkar Irappa Madabhavi Department of Pulmonary Medicine Indira Gandhi Medical CollegeShimla 171001Himachal PradeshIndia Department of Medical and Pediatric Oncology and Hematology J N Medical Collegeand KAHERBelagaviKarnataka 590010India Department of Medical and Pediatric Oncology and Hematology Kerudi Cancer HospitalBagalkotKarnataka 587103India

The severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)belongs to the genus Beta coronavirus and the family of *** is a positive-sense,non-segmented single-strand RNA *** common types of human coronaviruses circulate globally,particularly in the fall and winter *** are responsible for 10%-30% of all mild upper respiratory tract infections in *** are 229E,NL63 of the Alfacoronaviridae family,OC43,and HKU1 of the Betacoronaviridae ***,there are three highly pathogenic human coronaviruses:SARS-CoV-2,Middle East respiratory syndrome coronavirus,and the latest pandemic caused by the SARS-CoV-2 *** viruses,including SARS-CoV-2,have the inherent tendency to ***-CoV-2 is still evolving in ***,due to the development of herd immunity,prior infection,use of medication,vaccination,and antibodies,the viruses are facing immune *** the replication process and due to immune pressure,the virus may undergo *** SARS-CoV-2 variants,including the variants of concern(VOCs),such as B.1.1.7(Alpha),B.1.351(Beta),B.1.617/B.1.617.2(Delta),P.1(Gamma),and B.1.1.529(Omicron)have been reported from various parts of the *** VOCs contain several important mutations;some of them are on the spike *** mutations may lead to enhanced infectivity,transmissibility,and decreased neutralization efficacy by monoclonal antibodies,convalescent sera,or *** may also lead to a failure of detection by molecular diagnostic tests,leading to a delayed diagnosis,increased community spread,and delayed *** searched PubMed,EMBASE,Covariant,the Stanford variant Database,and the CINAHL from December 2019 to February 2023 using the following search terms:VOC,SARS-CoV-2,Omicron,mutations in SARS-CoV-2,*** review discusses the various mutations and their impact on infectivity,transmissibility,and neutralization efficacy.

关键词： Variant of concern SARS-CoV-2 Omicron N501Y mutation E484K mutation

Dupuytren's disease: A review

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Chinese Journal of Plastic and Reconstructive Surgery 2024年第3期 142-148页

作者： malay Sarkar Nitin Kashyap Irappa Madabhavi Department of Pulmonary Medicine Indira Gandhi Medical College Department of Plastic and Reconstructive Surgery Atal Institute of Medical Superspecialities Department of Medical and Pediatric Oncology and Hematology Jawaharlal Nehru Medical College KLE Academy of Higher Education and Research

Dupuytren's disease is a well-known benign fibroproliferative disorder that affects the palmar and digital fasciae of the hands. This spectrum includes nodule formation, cord formation, and flexion contracture of the digits,which may result in functional limitations. These deformities are often progressive and irreversible. Surgery is a cornerstone therapy. This review discusses the epidemiology, pathophysiology, risk factors, clinical manifestations, and management of Dupuytren's disease.

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LaNiO_(3)/g-C_(3)N_(4) nanocomposite:An efficient Z-scheme photocatalyst for wastewater treatment using direct sunlight

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Journal of Rare Earths 2022年第5期40卷 725-736,I0002页

作者： Kalyan Ghorai Atanu Panda Akbar Hossain Monotosh Bhattacharjee malay Chakraborty Swapan Kumar bhattacharya Bibhutibhushan Show Abhimanyu Sarkar Parthasarathi Bera Hansang Kim Md.Motin Seikh Arup Gayen Department of Chemistry Jadavpur UniversityKolkata 700032India Department of Mechanical Engineering Gachon UniversitySungnam 13120Republic of Korea Surface Engineering Division CSIR-National Aerospace LaboratoriesBengaluru 560017India Department of Chemistry Visva-BharatiSantiniketan 731235India

The major findings in this report are(ⅰ)development of nanocomposite photocatalyst working through Z-scheme charge transfer pathway across the heterojunction,(ⅱ)utilization of direct sunlight as the photo-source,and(ⅲ)prospect of ligand-hole in photocatalysis through enhanced sub-band gap absorption,The photocatalysts,namely LaNiO_(3),g-C_(3)N_(4) and LaNiO_(3)/g-C_(3)N_(4) nanocomposites were synthesized via facile route and were characterized for their structure,morphology,microstructure,texture,elemental mapping and surface oxidation states by using several physicochemical *** photocatalytic performance of the nanocomposite was tested through the degradation of hazardous azo dye pollutants,namely reactive black 5 and methylene blue as well as the colorless antibiotic-pollutant tetracycline hydrochloride in aqueous solution in presence of natural sunlight with excellent recycling *** 10%LaNiO_(3)/g-C_(3)N_(4) nanocomposite sample shows the best catalytic activity,degrading respectively 94%,98.6%and 88.1%of reactive black 5,methylene blue and tetracycline hydrochloride in60,180 and 120 *** photocatalytic activity of the nanocomposite phase is several times superior to that of the pure *** improvements of photocatalytic activity of g-C_(3)N_(4) in the nanocomposite have been rationalized through the construction of direct Z-scheme heterojunction and suppression of electron-hole pair recombination *** enhanced photo-absorption of the nanocomposite can possibly be related to sub-bandgap absorption,which is associated to the midgap state originating from ligand-hole formation or defects in the *** photodegradation process is mediated through the formation of super oxide radical(O_(2))and hole(h^(+))as the main responsible species.

关键词： LaNiO_(3)/g-C_(3)N_(4)nanocomposite Direct Z-scheme photocatalyst Natural sunlight Reactive black 5 Methylene blue Tetracycline hydrochloride

General relativistic calculations for white dwarfs

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Research in Astronomy and Astrophysics 2017年第6期17卷 107-116页

作者： Arun Mathew malay K. Nandy Department of Physics Indian Institute of Technology Guwahati Guwahati 781 039 India

The mass-radius relations for white dwarfs are investigated by solving the Newtonian as well as Tolman-Oppenheimer-Volkoff （TOV） equations for hydrostatic equilibrium assuming the electron gas to be non-interacting. We find that the Newtonian limiting mass of 1.4562 M is modified to 1.4166 M in the general relativistic case for 4He （and 12 6C） white dwarfs. Using the same general relativistic treatment, the critical mass for 56 26Fe white dwarfs is obtained as 1.2230 M. In addition, departure from the ideal degenerate equation of state （EoS） is accounted for by considering Salpeter＇s EoS along with the TOV equation, yielding slightly lower values for the critical masses, namely 1.4081 M for 4He, 1.3916M for 12C and 1.1565M for 56 26Fe white dwarfs. We also compare the critical densities for gravitational instability with the neutronization threshold densities to find that 4 2He and 12 6C white dwarfs are stable against neutronization with the critical values of 1.4081 M and 1.3916 M, respectively. However, the critical masses for 16 8O, 20 10Ne, 24 12Mg, 28 14Si,32 16S and 56 26Fewhite dwarfs are 26Fe white lower due to neutronization. Corresponding to their central densities for neutronization thresholds, we obtain their maximum stable masses due to neutronization by solving the TOV equation coupled with the Salpeter EoS.

关键词： equation of state - hydrodynamics-instabilities - relativistic processes - stars whitedwarfs

Noncommutative dispersion relation and mass-radius relation of white dwarfs

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Research in Astronomy and Astrophysics 2018年第12期18卷 75-88页

作者： Arun Mathew malay K.Nandy Department of Physics Indian Institute of Technology Guwahati

The equation of state of the electron degenerate gas in a white dwarf is usually treated by employing the ideal dispersion ***, the effect of quantum gravity is expected to be inevitably present and when this effect is considered through a non-commutative formulation, the dispersion relation undergoes a substantial *** this paper, we take such a modified dispersion relation and find the corresponding equation of state for the degenerate electron gas in white *** we solve the equation of hydrostatic equilibrium and find that this leads to the possibility of the existence of excessively high values of masses exceeding the Chandrasekhar limit, although the quantum gravity effect is taken to be very *** is only when we impose the additional effect of neutronization that we obtain white dwarfs with masses close to the Chandrasekhar limit with nonzero radii at the neutronization *** demonstrate these results by giving numerical estimates for the masses and radii of helium, carbon and oxygen white dwarfs.

关键词： gravitation equation of state stars:white dwarfs

Role of endoscopic ultrasound in idiopathic pancreatitis

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World Journal of Gastroenterology 2017年第38期23卷 6952-6961页

作者： Piyush Somani Tagore Sunkara malay Sharma Department of Gastr-oenterology Jaswant Rai Speciality Hospital Department of Gastroenterology and Hepatology The Brooklyn Hospital Center Clinical Affliate of The Mount Sinai Hospital

Recurrent acute pancreatitis(RAP) is defined based on the occurrence of two or more episodes of acute pancreatitis. The initial evaluation fails to detect the cause of RAP in 10%-30% of patients, whose condition is classified as idiopathic RAP(IRAP). Idiopathic acute pancreatitis(IAP) is a diagnostic challenge for gastroenterologists. In view of associated morbidity and mortality, it is important to determine the aetiology of pancreatitis to provide early treatment and prevent recurrence. Endoscopic ultrasound(EUS) is an investigation of choice for imaging of pancreas and biliary tract. In view of high diagnostic accuracy and safety of EUS, a EUS based management strategy appears to be a reasonable approach for evaluation of patients with a single/recurrent idiopathic pancreatitis. The most common diagnoses by EUS in IAP is biliary tract disease. The present review aims to discuss the role of EUS in the clinical management and diagnosis of patients with IAP. It elaborates the diagnostic approach to IAP in relation to EUS and other different modalities. Controversial issues in IAP like when to perform EUS, whether to perform after first episode or recurrent episodes, comparison among different investigations and the latest evidence significance are detailed.

关键词： Endoscopic ultrasound Pancreatitis ERCP MRCP USG CT Idiopathic recurrent pancreatitis Ascariasis Pancreatic cancer Biliary sludge Gallstones Microlithiasis Common bile duct stones

multi-solitons interaction multicomponent plasma extended Poincare–Lighthill–Kuo method head-on collision

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Communications in Theoretical Physics 2016年第2期65卷 237-246页

作者： Kaushik Roy malay Kumar Ghorui Prasanta Chatterjee Mouloud Tribeche Beluti M.K.M. High School P.O. -Beluti Dist. Birbhum West Bengal-731301 India Department of Mathematics Siksha Bhavana Visva Bharati University Santiniketan-731235 India plasma Physics Group Theoretical Physics Laboratory Faculty of Physics University of Bab-Ezzouar USTHB B.P. 32 E1 Alia Algiers 16111 Algeria

The propagation and interaction between ion acoustic multi-solitons in an unmagnetized multicomponent plasma consisting of fluid hot ions, positrons and both hot and cold electrons, are investigated by employing the extended Poincare–Lighthill–Kuo（PLK） method. Two different Kortewege-de Vries（K-dV） equations are derived. The Hirota＇s method is applied to get the K-dV multi-solitons solution. The phase shift due to the overtaking and head- on collision of the multi-solitons is obtained.

关键词： Head-on Collision of Ion-acoustic Multi-Solitons in e-p-i Plasma