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Open Journal of Ecology 2011年第3期1卷 65-72页

作者： Subhajit Das tarun kumar sarkar Minati De Dipnarayan Ganguly Tusher Kanti Maiti Abhishek Mukherjee Tapan kumar Jana tarun kumar De 不详

Populations of culturable microbes and activities of dehydrogenase & ?-D glucosidase were found maximum in surface soil and decreased with increase in depth in Sundarban mangrove *** maximum (13.529 X 106 C.F.U g-1 dry weight of soil) and minimum (11.547 X 106 C.F.U g-1 dry weight of soil) total microbial popu- lations in surface soil were recorded during po- st-monsoon and monsoon respectively. At 60 cm depth, the lower (6.396 X 106 C.F.U g-1 dry weight of soil) and higher (8.003 X 106 C.F.U g-1 dry weight of soil) numbers of total microbial populations were observed during monsoon and post-monsoon respectively. A decreasing trend of total microbial load, enzyme activities and nutrient status with organic carbon were found with increase in depth throughout the year. Present study revealed the relationship among depth integrated variations of physico-chemical compo- nents (viz. soil temperature, pH, moisture, orga- nic-C, .nitrogen, and available-P) and microbial populations as well as activity of dehydrogenase and ?-D glucosidase enzymes.

关键词： Sundarban Mangrove Sediment Enzyme Activities Depth Microbial Populations

Helicobacter pylori isolated from gastric juice have higher pathogenic potential than biopsy isolates

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Genes & Diseases 2024年第1期11卷 34-37页

作者： Budhadev Baral Dharmendra Kashyap Nidhi Varshney tarun Prakash Verma Ajay kumar Jain Debi Chatterji Vinod kumar Amit Mishra Awanish kumar Hem Chandra Jha Infection Bioengineering Group Department of Biosciences and Biomedical EngineeringIndian Institute of Technology IndoreSimrolIndoreMadhya Pradesh 453552India Choithram Hospital and Research Center IndoreMadhya Pradesh452014India Department of Metallurgy Engineering and Materials Science Indian Institute of Technology IndoreSimrolIndoreMadhya Pradesh 453552India Department of Bioscience&Bioengineering Indian Institute of Technology JodhpurNH 65 Nagaur RoadJodhpur DistrictKarwarRajasthan 342037India Department of Biotechnology National Institute of Technology RaipurGE RoadRaipurChhattisgarh 492010India

Persistent gastritis induced by Helicobacter pylori(***)is the strongest known risk factor for gastric cancer(GC).*** is prevalent in about 50%world's population,while it causes cancer in less than 2%of exposed individuals.1 Our studies found that *** infection can induce oncogenic properties in AGS cells by deregulating multiple factors associated with the cell cycle,apoptosis,and other important events associated with cancer progression.

关键词： H.pylori pylori Helicobacter

Are case reports valuable?Exploring their role in evidence based medicine and patient care

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World Journal of Clinical Cases 2024年第24期12卷 5452-5455页

作者： tarun kumar Suvvari Department of Clinical Research Squad Medicine and Research(SMR)Amadalavalasa 532185Andhra PradeshIndia Department of Medicine Rangaraya Medical CollegeKakinada 533001Andhra PradeshIndia

Case reports,often overlooked in evidence-based medicine(EBM),play a pivotal role in healthcare *** provide unique insights into rare conditions,novel treatments,and adverse effects,serving as valuable educational tools and generating new *** their limitations in generalizability,case reports contribute significantly to evidence-based practice by offering detailed clinical information and fostering critical thinking among healthcare *** acknowledging their limitations and adhering to reporting guidelines,case reports can contribute significantly to medical knowledge and patient care within the evolving landscape of *** editorial explores the intrinsic value of case reports in EBM and patient care.

关键词： Clinical cases Case reports Evidence based medicine Editorial Healthcare research

Efficacy of stromal vascular fraction for knee osteoarthritis:A prospective,single-centre,non-randomized study with 2 years follow-up

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World Journal of Orthopedics 2024年第5期15卷 457-468页

作者： Madhan Jeyaraman Naveen Jeyaraman tarun Jayakumar Swaminathan Ramasubramanian Rajni Ranjan Saurabh kumar Jha Ashim Gupta Department of Orthopaedics ACS Medical College and HospitalDr MGR Educational and Research InstituteChennaiTamil Nadu 600077India Department of Biotechnology School of Engineering and TechnologySharda UniversityGreater NoidaUttar Pradesh 201310India Department of Orthopaedics and Regenerative Medicine South Texas Orthopaedic Research InstituteLaredoTX 78045United States Department of Orthopaedics KIMS-Sunshine HospitalHyderabadTelangana 500032India Department of Orthopaedics Government Medical CollegeOmandurar Government EstateChennaiTamil Nadu 600002India Department of Orthopaedics School of Medical Sciences and ResearchSharda UniversityGreater NoidaUttar Pradesh 201306India Department of Zoology Kalindi CollegeUniversity of DelhiNew Delhi 110008India Department of Orthopaedics and Regenerative Medicine Regenerative OrthopaedicsNoida 201301Uttar PradeshIndia Department of Orthopaedics and Regenerative Medicine Future BiologicsLawrencevilleGA 30043United States Department of Orthopaedics and Regenerative Medicine BioIntegrateLawrencevilleGA 30043United States

BACKGROUND Current osteoarthritis(OA)treatments focus on symptom relief without addressing the underlying disease *** regenerative medicine,current treatments have *** regenerative medicine,more research is needed for intra-articular stromal vascular fraction(SVF)injections in OA,including dosage optimization,long-term efficacy,safety,comparisons with other treatments,and mechanism *** To compare the efficacy of intra-articular SVF with corticosteroid(ICS)injections in patients with primary knee *** The study included 50 patients with Kellgren-Lawrence grades II and III *** were randomly assigned(1:1)to receive either a single intra-articular SVF injection(group A)or a single intra-articular ICS(triamcinolone)(group B)*** were followed up at 1,3,6,12,and 24 *** analog score(VAS)and International Knee Documentation Committee(IKDC)scores were administered before the procedure and at all *** safety of SVF in terms of adverse and severe adverse events was *** analysis was performed with SPSS Version 26.0,IBM Corp,Chicago,IL,United *** Both groups had similar demographics and baseline clinical ***-up showed minor patient loss,resulting in 23 and 24 in groups A and B *** A experienced a notable reduction in pain,with VAS scores decreasing from 7.7 to 2.4 over 24 months,compared to a minor reduction from 7.8 to 6.2 in Group *** difference in pain reduction in group A was statistically significant from the third month ***,Group A showed significant improvements in knee functionality,with IKDC scores rising from 33.4 to 83.10,whereas Group B saw a modest increase from 36.7 to *** improvement in Group A was statistically significant from 6 months and maintained through 24 *** Our study demonstrated that intra-articular administration of SVF can lead to reduced pain and improved knee function in pa

关键词： Knee osteoarthritis Adipose tissue Stromal vascular fraction Regenerative medicine Orthobiologics

Exploring the association between hypertension and cognitive impairment:Evidence-based insights

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Chronic Diseases and Translational Medicine 2024年第2期10卷 153-155页

作者： tarun kumar Suvvari Rangaraya Medical College KakinadaAndhra PradeshIndia Squad Medicine and Research VizagAndhra PradeshIndia

To the Editor,Hypertension,also known as high blood pressure(BP),affects millions of people *** its well-documented cardiovascular consequences,hypertension has been uncovered an association with cognitive impairment.1 This is a growing concern,as the number of people with hypertension is expected to increase in the coming years,particularly in developing countries.

关键词： hypertension impairment cardiovascular

Determining the relationship between chemical composition and size, shape and effective density of airborne fine particles through concurrent use of inertial and optical based measurements

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Particuology 2016年第5期14卷 93-101页

作者： Anand kumar tarun Gupta Environmental Engineering and Management Program Indian Institute of Technology Kanpur Kanpur 208016 India Institute of Atmospheric and Climate Science Swiss Federal Institute of Technology Zurich Zurich 8092 Switzerland Department of Civil Engineering Indian Institute of Technology Kanpur Kanpur 208016 India

This study presents the development of a medium flow, multiple slit based PM2.5 （particle aerodynamic diameter 〈2.5 μm） inertial impactor. Its performance was compared with that of a light scattering based optical particle sizer in a field study and in controlled lab based experiments using polydisperse dolomite powder as test aerosol. The impactor＇s optimum nozzle configuration had a cutoff size of 2.51 μm （aero- dynamic diameter） at an operating flow rate of 215 L/rain with a pressure drop of 0.35 kPa across the impactor stage. Because the apparent particle density of an ambient aerosol depends on the physical properties and the chemical composition of the particles, the PM2.5 mass concentration was measured with an optical particle sizer and an inertial impactor over a weekday and a weekend day in a field study during which the effective particle shape factor and density were in tandem modified in order to com- pare the results from the two sampling techniques. The correlation of the two instrument results tended towards 1：1 with increasing values of shape factor （irregular shaped） and effective particle density. This observation was supported through chemical investigations of the collected mass, which showed a higher percentage contribution from elements which are mostly of crustal nature （namely, Ca, Fe, and Mg）.

关键词： lmpactor PM2.5 Optical particle counter Effective particle density Shape factor

Propagation of Rayleigh waves on free surface of transversely isotropic generalized thermoelastic diffusion

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Applied Mathematics and Mechanics(English Edition) 2008年第11期29卷 1451-1462页

作者： Rajneesh kumar tarun Kansal Department of Mathematics Kurukshetra UniversityKurukshetra-136 119India

The present paper is devoted to the study of Rayleigh wave propagation in a homogeneous, transversely isotropic, thermoelastic diffusive half-space, subject to stress free, thermally insulated/isothermal, and chemical potential boundary conditions in the context of the generalized thermoelastic diffusion theory. The Green-Lindsay（GL） theory is used in the study. In this theory, thermodiffusion and thermodiffusion mechanical relaxations are governed by four different time constants. Secular equations for surface wave propagation in the considered media are derived. Anisotropy and diffusion effects on the phase velocity, attenuation coefficient are graphically presented in order to present the analytical results and make comparison. Some special cases of frequency equations are derived from the present investigation.

关键词： wave propagation transversely isotropic generalized thermoelastic diffusion phase velocity attenuation coefficient

Effect of relaxation times on circular crested waves in thermoelastic diffusive plate

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Applied Mathematics and Mechanics(English Edition) 2010年第4期31卷 493-500页

作者： Rajneesh kumar tarun KANSAL Department of Mathematics Kurukshetra University

The propagation of circularly crested thermoelastic diffusive waves in an infinite homogeneous transversely isotropic plate subjected to stress free, isothermal/insulated and chemical potential conditions is investigated in the framework of different thermo- elastic diffusion theories. The dispersion equations of thermoelastic diffusive Lamb type waves are derived. Some special cases of the dispersion equations are also deduced.

关键词： wave propagation transversely generalized thermoelastic diffusion attenuation isotropic crested waves phase velocity coefficient amplitudes

Effects of rotation and tidal distortions on the shapes of radial velocity curves of polytropic models of pulsating variable stars

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Research in Astronomy and Astrophysics 2018年第6期18卷 17-26页

作者： tarun kumar Arvind kumar Lal Ankush Pathania School of Mathematics Thapar University

Anharmonic oscillations of rotating stars have been studied by various authors in literature to explain the observed features of certain variable stars. However, there is no study available in literature that has discussed the combined effect of rotation and tidal distortions on the anharmonic oscillations of stars. In this paper, we have created a model to determine the effect of rotation and tidal distortions on the anharmonic radial oscillations associated with various polytropic models of pulsating variable stars. For this study we have used the theory of Rosseland to obtain the anharmonic pulsation equation for rotationally and tidally distorted polytropic models of pulsating variable stars. The main objective of this study is to investigate the effect of rotation and tidal distortions on the shapes of the radial velocity curves for rotationally and tidally distorted polytropic models of pulsating variable stars. The results of the present study show that the rotational effects cause more deviations in the shapes of radial velocity curves of pulsating variable stars as compared to tidal effects.

关键词： stars: rotation stars: oscillations stars: binaries technique: radial velocities

Effect of interaction of the various modes on the radial velocity curves of the polytropic models of rotationally and tidally distorted pulsating variable stars

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Research in Astronomy and Astrophysics 2018年第12期18卷 53-66页

作者： tarun kumar Ankush Pathania Arvind kumar Lal School of Mathematics Thapar Institute of Engineering and Technology

In our previous work, we developed a model to study the effects of rotation and/or tidal distortions on anharmonic radial oscillations and hence on the radial velocity curves of the polytropic models of pulsating variable *** considered the first three modes(fundamental and the next two higher modes) for the polytropic models of index 1.5 and 3.0 in that *** the present paper, we are further extending our previous work to study the effect of the interaction of various modes on anharmonic radial oscillations and hence on radial velocity curves of the rotationally and/or tidally distorted polytropic models of pulsating variable *** this purpose, we have considered the following cases:(i) fundamental mode(ii) fundamental and the first mode,(iii) fundamental and the next two modes and finally(iv) fundamental and the next three higher modes of pulsation in our *** objective of this paper is also to investigate whether the interaction of various modes affects the results of our previous study or *** results of this study show that the interaction of the fundamental mode with higher modes appreciably changes the shape of the radial velocity curve of rotationally distorted and rotationally and tidally distorted polytropic models of pulsating variable stars.

关键词： stars:rotation stars:oscillations stars:binaries technique:radial velocities