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A rare medicinal fungus,Lignosus rhinocerus(Polyporales,Agaricomycetes),new to India

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Studies in Fungi 2021年第1期6卷 151-158页

作者： Vinjusha N arun kumar tk The Zamorin’s Guruvayurappan College(affiliated to the University of Calicut) Kerala 673014India

Lignosus rhinocerus is one of the most valuable medicinal fungi used throughout South East Asia,and South *** polypore is characterized by a stipitate basidiomata with orbicular pileus,and an underground sclerotium,a trimitic hyphal system bearing generative hyphae with clamp connections,and globose to subglobose ***,including the sclerotia of *** are used to treat various *** is rarely encountered in the wild and has a very restricted geographic *** of its rarity and importance,domestication and commercial cultivation of the fungus has been *** study of the polyporoid fungi in forests of Kerala State,India,some interesting specimens were *** taxonomic study of the collected specimens identified them as ***,with a distribution record new to *** account of the species is presented.

关键词： Polyporaceae sclerotia taxonomy therapeutic tiger milk mushroom

First record of the halophilic fungus Penicilliopsis clavariiformis from Diospyros paniculata

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Studies in Fungi 2020年第1期5卷 400-405页

作者： Krishnapriya K Vinjusha N Anjitha T Salna N arun kumar tk The Zamorin’s Guruvayurappan College KozhikodeKerala 673014India

Penicilliopsis clavariiformis,an ascomycete fungus is reported for the first time from Diospyros *** clavarioid ascomata of *** were found emerging out of fruits and seeds of *** growing in a sacred grove in Kerala St... 详细信息

关键词： antibacterial antifungal biodiversity clavarioid Ebenaceae Kerala

Endothelial dysfunction in the kidney transplant population:Current evidence and management strategies

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World Journal of Transplantation 2025年第1期15卷 24-43页

作者： arun Prabhahar Akshey Batta Juniali Hatwal Vivek kumar Raja Ramachandran Akash Batta Department of Telemedicine(Internal Medicine and Nephrology) Post Graduate Institute of Medical Education and ResearchChandigarh 160012India Department of Urology and Renal Transplant Neelam HospitalRajpura 140401PunjabIndia Department of Internal Medicine Post Graduate Institute of Medical Education and ResearchChandigarh 160012India Department of Nephrology Post Graduate Institute of Medical Education and ResearchChandigarh 160012India Department of Cardiology Dayanand Medical College and HospitalLudhiana 141001PunjabIndia

The endothelium modulates vascular homeostasis owing to a variety of vasoconstrictors and *** dysfunction(ED),characterized by impaired vasodilation,inflammation,and thrombosis,triggers future cardiovascular(CV)*** kidney disease,a state of chronic inflammation caused by oxidative stress,metabolic abnormalities,infection,and uremic toxins damages the *** is also associated with a decline in estimated glomerular filtration *** kidney transplantation,endothelial functions undergo immediate but partial restoration,promising graft longevity and enhanced CV ***,the anticipated CV outcomes do not happen due to various transplant-related and unrelated risk factors for ED,culminating in poor CV health and graft *** in kidney transplant recipients is an underrecognized and poorly studied *** diseases are the leading cause of death among kidney transplant candidates with functioning *** contributes to the pathogenesis of many of the CV *** biomarkers and vasoreactivity tests are available to study endothelial *** an increasing number of transplants happening every year,and improved graft rejection rates due to the availability of effective immunosuppressants,the focus has now shifted to endothelial protection for the prevention,early recognition,and treatment of CV diseases.

关键词： Endothelial dysfunction Endothelium Cardiovascular disease Kidney transplantation Chronic kidney disease Nitric oxide Flow-mediated dilatation Nitro-glycerine-mediated dilatation Biomarkers

Congenital anomalies of coronary artery misdiagnosed as coronary dilatations in Kawasaki disease:A clinical predicament

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World Journal of Clinical Pediatrics 2025年第1期14卷 93-100页

作者： Rakesh kumar Pilania Pallavi L Nadig Suprit Basu Reva Tyagi Abarna Thangaraj Ridhima Aggarwal Munish Arora arun Sharma Surjit Singh Manphool Singhal Pediatric Allergy Immunology Unit Department of PediatricsAdvanced Pediatrics CenterPost Graduate Institute of Medical Education and ResearchChandigarh 160012ChandīgarhIndia Department of Radiodiagnosis and Imaging Postgraduate Institute of Medical Education and ResearchChandigarh 160012ChandīgarhIndia

BACKGROUND 2D-echocardiography(2DE)has been the primary imaging modality in children with Kawasaki disease(KD)to assess coronary *** To report the presence and implications of incidental congenital coronary artery anomalies that had been misinterpreted as coronary artery abnormalities(CAAs)on *** Records of children diagnosed with KD,who underwent computed tomography coronary angiography(CTCA)at our center between 2013-2023 were *** identified 3 children with congenital coronary artery anomalies in this cohort on *** of CTCA and 2DE were compared in these 3 *** Of the 241 patients with KD who underwent CTCA,3(1.24%)had congenital coronary artery anomalies on CTCA detected *** all 3 patients,baseline 2DE had identified *** was then performed for detailed evaluation as per our unit ***(11-year-boy)amongst the 3 patients had complete KD,while the other two(3.3-year-boy;4-month-girl)had incomplete *** revealed separate origins of left anterior descending artery and left circumflex from left sinus[misinterpreted as dilated left main coronary artery(LCA)on 2DE],single coronary artery(interpreted as dilated LCA on 2DE)and dilated right coronary artery on 2DE in case of anomalous origin of LCA from the main pulmonary *** latter one was subsequently operated *** CTCA is essential for detailed assessment of coronary arteries in children with KD especially in cases where there is suspicion of congenital coronary artery *** solely on 2DE may not be sufficient in such cases,and findings from CTCA can significantly impact therapeutic decision-making.

关键词： Coronary artery abnormalities Congenital coronary artery anomalies Computed tomography coronary angiography Kawasaki disease 2-dimensional echocardiography

Evolution of the 2015/16 El Nio and historical perspective since 1979

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Science China Earth Sciences 2017年第9期60卷 1572-1588页

作者： Yan XUE arun kumar Climate Prediction Center National Centers for Environmental Prediction National Weather Service National Oceanic and Atmospheric Administration College Park MD 20740 USA

The 2015/16 El Nio developed from weak warm conditions in late 2014 and NINO3.4 reached 3℃ in November 2015. We describe the characteristics of the evolution of the 2015/16 El Nio using various data sets including SST, surface winds,outgoing longwave radiation and subsurface temperature from an ensemble operational ocean reanalyses, and place this event in the context of historical ENSO events since 1979. One salient feature about the 2015/16 El Nio was a large number of westerly wind bursts and downwelling oceanic Kelvin waves(DWKVs). Four DWKVs were observed in April-November 2015 that initiated and enhanced the eastern-central Pacific warming. Eastward zonal current anomalies associated with DWKVs advected the warm pool water eastward in spring/summer. An upwelling Kelvin wave(UWKV) emerged in early November 2015 leading to a rapid decline of the event. Another outstanding feature was that NINO4 reached a historical high(1.7℃), which was 1℃(0.8℃) higher than that of the 1982/83(1997/98) El Nio . Although NINO3 was comparable to that of the 1982/83 and 1997/98 El Nio , NINO1+2 was much weaker. Consistently, enhanced convection was displaced 20 degree westward, and the maximum D20 anomaly was about 1/3.1/2 of that in 1997 and 1982 near the west coast of South America.

关键词： ENSO Sea surface temperature Westerly wind bursts Ocean Kelvin waves Thermocline variability Ocean reanalysis

Comparative cytotoxicity of nanoparticles and ions to Escherichia coli in binary mixtures

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Journal of Environmental Sciences 2017年第5期29卷 11-19页

作者： Swati Srivastaua arun kumar Department of Civil Engineering Indian Institute of Technology Delhi New Delhi 110016 India

The objective of this study was to understand toxicity of mixture of nanoparticles （NPs）（ZnO and TiO2） and their ions to Escherichia coll. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of I mg/L was observed to be significantly toxic to E. coli in binary mixture setup （exposure concentration： 1 mg/L ZnO and 1 mg/L TiO2; 21.15% decrease in plate count concentration with respect to control）. Exposure ofE. coli to mixture of NPs at 1000 mg/L （i.e., 1000 mg/L ZnO and 1000 mg/L TiO2） resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration （i.e., 803.0 mg/L Zn and 593.3 mg/L Ti where ion concentrations are equal to the Zn ions present in 1000 mg/L ZnO NP solution and Ti＋4 ions present in 1000 mg/L TiO2 NP solution）. Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase （Alp） assay indicated that the maximum damage was observed when E. coli was exposed to 1000 mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier.

关键词： E. coli Zinc oxide nanoparticles Titanium dioxide nanoparticles Mixture toxicity Alkaline phosphatase assay

Shock wave mitigation using zig-zag structures and cylindrical obstructions

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Defence Technology（防务技术） 2021年第6期17卷 1840-1851页

作者： arun kumar R Vaibhav Pathak Department of Mechanical Engineering Indian Institute of Technology Jodhpur(IITJ)JodhpurRajasthan342037India

The present study focuses on the mitigation of shock wave using novel geometric passages in the flow *** strategy is to produce multiple shock reflections and diffractions in the passage with minimum flow obstruction,which in turn is expected to reduce the shock wave strength at the target *** the present study the interaction of a plane shock front(generated from a shock tube)with various geometric designs such as,1)zig-zag geometric passage,2)staggered cylindrical obstructions and 3)zigzag passage with cylindrical obstructions have been investigated using computational *** is seen from the numerical simulation that,among the various designs,the maximum shock attenuation is produced by the zig-zag passage with cylindrical obstructions which is then followed by zig-zag passage and staggered cylindrical obstructions.A comprehensive investigation on the shock wave reflection and diffraction phenomena happening in the proposed complex passages have also been carried *** the new zig-zag design,the initial shock wave undergoes shock wave reflection and diffraction process which swaps alternatively as the shock front moves from one turn to the other *** cyclic shock reflection and diffraction process helps in diffusing the shock wave energy with practically no obstruction to the flow *** is found that by combining the shock attenuation ability of zig-zag passage(using shock reflection and diffraction)with the shock attenuation ability of cylindrical blocks(by flow obstruction),a drastic attenuation in shock strength can be achieved with moderate level of flow blocking.

关键词： Blast wave mitigation Blockage ratio Geometric obstructions Shock wave reflection and diffraction Zig-zag structure

PAPR Reduction in NOMA by Using Hybrid Algorithms

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Computers, Materials & Continua 2021年第10期69卷 1391-1406页

作者： Mohit kumar Sharma arun kumar Department of Electronics and Communication Engineering JECRC UniversityJaipur303905India

Non-orthogonal multiple access(NOMA)is gaining considerable attention due to its features,such as low out-of-band radiation,signal detection capability,high spectrum gain,fast data rate,and massive D2D *** may be considered for 5G ***,the high peak-to-average power ratio(PAPR)is viewed as a significant disadvantage of a NOMA waveform,and it weakens the quality of signals and the throughput of the *** this article,we introduce a modified NOMA system by employing a block of wavelet transform,an alternative to FFT(Fast Fourier transform).The modified system combines the details of fractional frequency and time analysis of NOMA *** this correspondence,we utilize an advanced partial transmission scheme(PTS),and selective mapping(SLM),and present a genetic algorithm(GA)for SLM to investigate the peak power performance of a WT-based NOMA *** performance of WT-SLM,WT-PTS,and WT-SLM-GA methods is compared with that of the traditional NOMAbased SLM and PTS *** simulation results demonstrate that the proposed system effectively reduces PAPR in comparison with the traditional schemes.

关键词： PAPR wavelet transform NOMA PTS SLM 5G

MATHEMATICAL DESCRIPTION OF GROWTH OF MULTIPLE ROOT BRANCHING STRUCTURE IN A PLANT

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International Journal of Biomathematics 2013年第3期6卷 1-10页

作者： arun kumar Department of Mathematics Government College Kota (Raj.) India

An existing growth model of Edelstien is extended and modified for multiple root branching structure or root hairs of any plant. Numerical and analytical solutions for the model are developed and compared. In the derivation it is assumed that multiple root branches are attached to the root surface that acts as a continuous source of new tips. The numerical scheme is derived with anticipation of the fact that comparison with experimental data may necessitate a more complicated model.

关键词： Uptake parameter asymptotic matching van Genuchten formula relativewater content.