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Srivastava, Ashok Kumar,Kar, Prasanta Kumar,Sinha, Ravibhushan,Sinha, Manoj Kumar,Vijayaprakash, Nanjappa Basavappa Korean Society of Sericultural Science 2009 International Journal of Industrial Entomology Vol.19 No.2
Raily ecorace of Indian tasar silkworm is wild in nature and distributed abundantly in dense deciduous forest on Shorea robusta (Sal) in Bastar ($17^{\circ}4'$ and $20^{\circ}34'$ N, $80^{\circ}15'$ and $82^{\circ}15'$ E and altitude ranging from 150 to 1200 mMSL) forest ranges of Chhattisgarh, India. It is represented by about 20 populations. Out of those, eleven populations showed intra- as well as inter- population variability based on phenotypic expression and also in major economic traits viz. cocoon weight, shell weight, filament length and denier. Genetic diversity in these eleven populations was studied using Inter-Simple Sequence Repeat (ISSR) markers. The band profiles generated with eight ISSR primers have depicted variation in band size. All the primers exhibited polymorphism which is an indicative of the genetic variation in individual Raily silkworm. Among the populations, total polymorphism recorded was 76%. The population genetic aspects assessed through POPGENE software package are discussed in the paper. Nei's gene diversity (h) ranged from 0.194 to 0.337 exhibiting high heterozygosity. Relevance of the present study is of high significance in formulating conservation strategies and sustainable utilization of the economically important Raily ecorace of Antheraea mylitta.
( Ashok Kumar Srivastava ),( Prasanta Kumar Kar ),( Ravibhushan Sinha ),( Manoj Kumar Sinha ),( Nanjappa Basavappa Vijayaprakash ) 한국잠사학회 2009 International Journal of Industrial Entomology Vol.19 No.2
Raily ecorace of Indian tasar silkworm is wild in nature and distributed abundantly in dense deciduous forest on Shorea robusta (Sal) in Bastar (17°4` and 20°34` N, 80°15` and 82°15` E and altitude ranging from 150 to 1200 mMSL) forest ranges of Chhattisgarh, India. It is represented by about 20 populations. Out of those, eleven populations showed intra- as well as inter- population variability based on phenotypic expression and also in major economic traits viz. cocoon weight, shell weight, filament length and denier. Genetic diversity in these eleven populations was studied using Inter-Simple Sequence Repeat (ISSR) markers. The band profiles generated with eight ISSR primers have depicted variation in band size. All the primers exhibited polymorphism which is an indicative of the genetic variation in individual Raily silkworm. Among the populations, total polymorphism recorded was 76%. The population genetic aspects assessed through POPGENE software package are discussed in the paper. Nei`s gene diversity (h) ranged from 0.194 to 0.337 exhibiting high heterozygosity. Relevance of the present study is of high significance in formulating conservation strategies and sustainable utilization of the economically important Raily ecorace of Antheraea mylitta.
COVID-19 Rapid Antigen Test: Role in Screening Prior to Gastrointestinal Endoscopy
Ashok Dalal,Ujjwal Sonika,Manish Kumar,Roshan George,Ajay Kumar,Siddharth Srivastava,Sanjeev Sachdeva,Barjesh Chander Sharma 대한소화기내시경학회 2021 Clinical Endoscopy Vol.54 No.4
Background/Aims: The severe acute respiratory syndrome coronavirus 2 pandemic has affected the gastrointestinal (GI) endoscopyunits globally owing to the risk of transmission. We present our data on the use of rapid antigen test (RAT) as a screening tool priorto endoscopy to prevent the transmission of coronavirus disease (COVID-19). Methods: This study was a retrospective analysis of patients who underwent any GI endoscopic procedure from July 2020 to October2020 at a tertiary referral center in New Delhi, India. All patients underwent screening for COVID-19 using RAT, and endoscopywas performed only when the RAT was negative. The data are presented as numbers and percentages. Results: A total of 3,002 endoscopic procedures were performed during the study period. Only one endoscopic procedure wasperformed in a COVID-19 positive patient. A total of 53 healthcare workers were involved in conducting these procedures. Only2 healthcare workers (3.8%) were diagnosed COVID-19 positive, presumably due to community-acquired infection, during thisperiod. Conclusions: The COVID-19 RAT is easily usable as a simple screening tool prior to GI endoscopy during the COVID-19 pandemic.
Study of electrospun polycarbosilane (PCS) nanofibrous web by needle-less technique
Mukesh Kumar Sinha,Biswa Ranjan Das,Raghwesh Mishra,Ashok Ranjan,Anurag Srivastava,Arvind Kumar Saxena 한국의류학회 2014 Fashion and Textiles Vol.1 No.1
This study reports on the various functional characteristics of silicon carbide (SiC) nanofibrous web. The SiC nanofibrous web was spun by the electrospinning technique using Nano Spider (needle-less) machine. The as-spun nanofibrous web was cured to 180°C and subsequently, pyrolized at 1000°C under inert nitrogen (N2) atmosphere to convert into silicon carbide nanofibrous web. The various properties of SiC web is characterized by using FESEM, Thermal Analysis, X-ray Diffraction, Energy Dispersive Spectroscopy (EDX), Atomic Force Microscopy and Surface Profilomertry. FESEM microphotographs indicated the interconnected fibres leading to pores of prepared SiC Nanofibrous web. Deep rooted fibre surface porosity was revealed by AFM. The thermal behavior of as-spun, cured and pyrolized PCS webs are influenced by the heat treatment at different temperatures. The surface roughness changes with the heat treatment of PCS nanofibrous webs. The pyrolized web carries higher surface roughness as compared to as-spun and cured webs. The EDX plots indicated the presence of C and Si elements in pyrolized PCS nanofibrous web.
Neeraj Kumar,Ashok K. Srivastava,Prabhat Gautam,M. K. Manoj 한국재료학회 2022 한국재료학회지 Vol.32 No.5
Corrosion is a natural, inevitable process, and is one of the world's most serious problems. Losses incurred due to corrosion are extremely expensive for society. Several technological strategies have been explored and implemented to address these losses. The use of inhibitors to prevent corrosion is a common and efficient method to reduce corrosion losses. This review covers Al and Al-composite corrosion inhibitors in chloride-containing solutions, because of their popularity in a broad array of industrial applications. A vast number of studies in the literature detail the common tendency of Al and Al-composites with reinforcements to deteriorate. Accordingly, it is worthwhile to employ inhibitors to protect them, as discussed in the present work. The emphasis is on selecting the smartest corrosion inhibitor and evaluating its performance. According to the study, the most commonly used corrosion inhibitors are 1,4-naphthoquinone (NQ), 1,5-naphthalene diol, 3-amino-1,2,4-triazole-5-thiol (ATAT), ammonium tetrathiotungstate, clotrimazole, amoxicillin, antimicrobial and antifungal drugs. Electrochemical impedance spectroscopy (EIS), potentiodynamic (PDP), and weight loss were among the most commonly used modern electrochemical technologies to test inhibitors’ efficacy under environmental conditions.
Cardiovagal Barorefex Sensitivity in Parkinson’s Disease and Multiple-System Atrophy
Sankanika Roy,Ashok Kumar Jaryal,Achal Kumar Srivastava,Kishore Kumar Deepak 대한신경과학회 2016 Journal of Clinical Neurology Vol.12 No.2
Background and Purpose Parkinson’s disease (PD) and multiple-system atrophy of the parkinsonian type (MSA-P) are progressive neurodegenerative disorders that in addition to dysfunction of the motor system also present with features of dysautonomia, frequently manifesting as orthostatic hypotension (OH). Te pathophysiology of OH has been proposed to difer between these two disorders. Tis study investigated the spontaneous and cardiovagal barorefex sensitivity (BRS) in Parkinson’s disease patients with orthostatic hypotension (PDOH ) and multiple system atrophy of Parkinsonian type with orthostatic hypotension in an attempt to diferentiate the two disorders. Methods Two methods were used for determining the BRS: a spontaneous method (spontaneous BRS) and the refexive barorefex gain (cardiovagal BRS) from phases II and IV of the Valsalva maneuver (VM) in PDOH and MSA-POH . Results The spontaneous BRS (5.04±0.66 ms/mm Hg vs. 4.78±0.64 ms/mm Hg, p=0.54) and the cardiovagal BRS from phase II of the VM (0.96±0.75 ms/mm Hg vs. 1.34±1.51 ms/mm Hg, p=0.76) did not difer between PDOH and MSA-POH , but the cardiovagal BRS from phase IV of the VM (0.03±0.07 ms/mm Hg vs. 2.86±2.39 ms/mm Hg, p=0.004) was signifcantly lower in PDOH . Conclusions Te cardiovagal BRS from phase IV of the VM has potential for diferentiating PDOH and MSA-POH , indicating a diference in the pathophysiological mechanisms underlying the autonomic dysfunction in the two disorders.
Carotid cavernous fistula: Redefining the angioarchitecture
Keshav Mishra,Vivek Kumar,Vinay,Ashok Gandhi,Trilochan Srivastava 대한뇌혈관외과학회 2022 Journal of Cerebrovascular and Endovascular Neuros Vol.24 No.4
Objective: Numerous classification schemes have been used for carotid cavernous fistula (CCF), each describing some aspect of the disease process but none of them provides a complete description of the fistula including its clinical features, natural history, arterial and venous architecture. Methods: Retrospective clinical and radiological review was done for all the patients diagnosed with CCF and treated at our institute. The CCF were classified according to the proposed API-ACE classification along with Barrow and Thomas classification. Results: Overall 28 patients (M=21, F=7) were diagnosed and treated during the 6-year period. 89.2% of CCF developed following an episode of head injury. Orbital symptoms were the most common presenting complaints. Barrows type A was the most predominant subtype (n=24) and most of the patients (n=23) demonstrated decreased ipsilateral carotid filling. Combined anterior and posterior drainage pattern was the most common drainage pattern and anterior drainage was more commonly observed than posterior drainage. Conclusions: API-ACE classification helps to better understand and classify the angioarchitecture of CCF which could
Lokesh, Gangadharaiah,Tirkey, Sushma Rani,Srivastava, Ashok Kumar,Kar, Prasant Kumar,Sinha, Manoj Kumar Korean Society of Sericultural Science 2013 International Journal of Industrial Entomology Vol.26 No.2
Antheraea mylitta Drury is basically a crossbreeding species, as such it seems to be potentially a good material for the exploitation of heterosis. In the present study F1 hybrid of wild ecorace Laria (L) and semi-domestic Daba (D) was raised and evaluated for various quantitative traits and biochemical parameters during larval stage. Improved fecundity ($+18{\pm}1.8%$ and higher egg hatching rate ($+10.96{\pm}1.3%$) was recorded in the F1hybrid ($L{\times}D$). Biochemical parameters studied in the hemolymph, midgut and fatbody of the larva showed significantly higher (P<0.05) total proteins and carbohydrate concentration besides digestive enzyme activity. Correspondingly SDS-PAGE revealed more number of protein bands in the hemolymph sample of F1s, ranging between 29 kDa to 66 kDa compared to parental lines. The present study demonstrates the positive heterosis effect in the F1 hybrid of Laria ${\times}$ Daba. Biochemical analysis indicates that, there is possibilities of exploitation of hybrids with specific parents targeted for desirable commercial traits (silk yield and fecundity). Moreover, most of these biochemical parameters can be used as markers to analyze the genetic improvement in the tasar silkworms.
( Gangadharaiah Lokesh ),( Sushma Rani Tirkey ),( Ashok Kumar Srivastava ),( Prasant Kumar Kar ),( Manoj Kumar Sinha ) 한국잠사학회 2013 International Journal of Industrial Entomology Vol.26 No.2
Antheraea mylitta Drury is basically a crossbreeding species, as such it seems to be potentially a good material for the exploitation of heterosis. In the present study F1 hybrid of wild ecorace Laria (L) and semi-domestic Daba (D) was raised and evaluated for various quantitative traits and biochemical parameters during larval stage. Improved fecundity (+18 ± 1.8%) and higher egg hatching rate (+10.96 ± 1.3%) was recorded in the F1hybrid (L x D). Biochemical parameters studied in the hemolymph, midgut and fatbody of the larva showed significantly higher (P<0.05) total proteins and carbohydrate concentration besides digestive enzyme activity. Correspondingly SDS-PAGE revealed more number of protein bands in the hemolymph sample of F1s, ranging between 29 kDa to 66 kDa compared to parental lines. The present study demonstrates the positive heterosis effect in the F1 hybrid of Laria x Daba. Biochemical analysis indicates that, there is possibilities of exploitation of hybrids with specific parents targeted for desirable commercial traits (silk yield and fecundity). Moreover, most of these biochemical parameters can be used as markers to analyze the genetic improvement in the tasar silkworms.