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- 저자 : Bhupendra Kumar (검색결과 27 건)
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Bhupendra Kumar Jain,Kumar Vaibhaw,Pankaj Kumar Garg,Sanjay Gupta,Debajyoti Mohanty 대한대장항문학회 2012 Annals of Coloproctolgy Vol.28 No.2
Purpose: This randomized clinical trial was conducted to compare a fistulectomy and a fistulotomy with marsupialization in the management of a simple anal fistula. Methods: Forty patients with simple anal fistula were randomized into two groups. Fistulous tracts were managed by using a fistulectomy (group A) while a fistulotomy with marsupialization was performed in group B. The primary outcome measure was wound healing time while secondary outcome measures were operating time, postoperative wound size, postoperative pain, wound infection, anal incontinence, recurrence and patient satisfaction. Results: Postoperative wounds in group B healed earlier in comparison to group A wounds (4.85 ± 1.39 weeks vs. 6.75 ±1.83 weeks, P = 0.035). No significant differences existed between the operating times (28.00 ± 6.35 minutes vs. 28.20 ± 6.57minutes, P = 0.925) and visual analogue scale scores for postoperative pain on the first postoperative day (4.05 ± 1.47 vs. 4.50 ± 1.32, P = 0.221) for the two groups. Postoperative wounds were larger in group A than in group B (2.07 ± 0.1.90 cm2vs.1.23 ± 0.87 cm2), however this difference did not reach statistical significance (P = 0.192). Wound discharge was observed for a significantly longer duration in group A than in group B (4.10 ± 1.91 weeks vs. 2.75 ± 1.71 weeks, P = 0.035). There were no differences in social and sexual activities after surgery between the patients of the two groups. No patient developed anal incontinence or recurrence during the follow-up period of twelve weeks. Conclusion: In comparison to a fistulectomy, a fistulotomy with marsupialization results in faster healing and a shorter duration of wound discharge without increasing the operating time. Purpose: This randomized clinical trial was conducted to compare a fistulectomy and a fistulotomy with marsupialization in the management of a simple anal fistula. Methods: Forty patients with simple anal fistula were randomized into two groups. Fistulous tracts were managed by using a fistulectomy (group A) while a fistulotomy with marsupialization was performed in group B. The primary outcome measure was wound healing time while secondary outcome measures were operating time, postoperative wound size, postoperative pain, wound infection, anal incontinence, recurrence and patient satisfaction. Results: Postoperative wounds in group B healed earlier in comparison to group A wounds (4.85 ± 1.39 weeks vs. 6.75 ±1.83 weeks, P = 0.035). No significant differences existed between the operating times (28.00 ± 6.35 minutes vs. 28.20 ± 6.57minutes, P = 0.925) and visual analogue scale scores for postoperative pain on the first postoperative day (4.05 ± 1.47 vs. 4.50 ± 1.32, P = 0.221) for the two groups. Postoperative wounds were larger in group A than in group B (2.07 ± 0.1.90 cm2vs.1.23 ± 0.87 cm2), however this difference did not reach statistical significance (P = 0.192). Wound discharge was observed for a significantly longer duration in group A than in group B (4.10 ± 1.91 weeks vs. 2.75 ± 1.71 weeks, P = 0.035). There were no differences in social and sexual activities after surgery between the patients of the two groups. No patient developed anal incontinence or recurrence during the follow-up period of twelve weeks. Conclusion: In comparison to a fistulectomy, a fistulotomy with marsupialization results in faster healing and a shorter duration of wound discharge without increasing the operating time.
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Bhupendra Kumar,Geetanjali Mishra,Omkar 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.2
Multiple interactions (antagonistic/additive/synergistic) occurring within predatory combinations, determine the suitability of combinations in suppressing the aphid pests. In the present study such interactionswithin larval (fourth instars) and adult (10-day old females) combinations were assessed using two aphidophagous ladybird beetles — Coccinella septempunctata (L.)/C7 and Coccinella transversalis (F.)/Ct, on pea aphid, Acyrthosiphon pisum (Harris), bean aphid, Aphis craccivora Koch andmustard aphid, Lipaphis erysimi (Kaltenbach). Experiments were conducted to study the influence of prey species on predatory interactions of ladybirds kept within conspecific/ heterospecific combinations; and to test the hypothesis whether predatory combinations tested on one prey specieswould perform equally on the other prey species. Results revealed that the performance of predators within combinations varied on different prey. Larval Ct+Ct and C7+Ct combinations had additive effects on L. erysimi and antagonistic effects on A. pisum and A. craccivora. Similarly, adult Ct+Ct combination exhibited an additive effect on A. craccivora and antagonistic effects on A. pisum and L. erysimi. Moreover, heterospecific combinations inflicted higher prey consumption, and had a higher conversion efficiency and body biomass gain than conspecific combinations; and despite causing higher prey consumption, adult combinations showed lower conversion efficiencies and body biomass gain than the larval combinations. Thus, efficacy of predatory combinations needs to be tested on target prey prior to the release of predatory combinations in the fields. Moreover, multi-species assemblages of ladybirds may provide better biological control of aphids compared to single species.
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Template free facile synthesis of mesoporous mordenite for bulky molecular catalytic reactions
Bhupendra Kumar Singh,김용선,백승빈,Abhishek Meena,Siraj Sultan,곽자훈,김광수 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.57 No.-
The synthesis of highly stable mesoporous zeolites is one of the great challenges in materials science. Soft and hard templating methods have widely been applied to synthesize mesoporous zeolites having different pore diameters and structures. Here, we report a facile and template free hydrothermal synthesis of mesoporous mordenite (MOR) by controlling synthesis conditions. The small nanoparticles of ∼50–80 nm were self-assembled into 2–3 μm MOR. Intracrystalline mesopores of ∼3–5 nm were abundantly observed throughout the MOR nanoparticles. Synthesized mesoporous MOR demonstrated significantly improved catalytic efficiencies (∼100%), 3–5 times higher than its conventional counterparts (CBV 10A and CBV 21).
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Template free facile synthesis of mesoporous mordenite for bulky molecular catalytic reactions
Singh, Bhupendra Kumar,Kim, Yongseon,Baek, Seung Bin,Meena, Abhishek,Sultan, Siraj,Kwak, Ja Hun,Kim, Kwang S. THE KOREAN SOCIETY OF INDUSTRIAL AND ENGINEERING 2018 Journal of Industrial and Engineering Chemistry Vol.57 No.-
<P><B>Abstract</B></P> <P>The synthesis of highly stable mesoporous zeolites is one of the great challenges in materials science. Soft and hard templating methods have widely been applied to synthesize mesoporous zeolites having different pore diameters and structures. Here, we report a facile and template free hydrothermal synthesis of mesoporous mordenite (MOR) by controlling synthesis conditions. The small nanoparticles of ∼50–80nm were self-assembled into 2–3μm MOR. Intracrystalline mesopores of ∼3–5nm were abundantly observed throughout the MOR nanoparticles. Synthesized mesoporous MOR demonstrated significantly improved catalytic efficiencies (∼100%), 3–5 times higher than its conventional counterparts (CBV 10A and CBV 21).</P> <P><B>Highlights</B></P> <P> <UL> <LI> Template free facile synthesis of mesoporous mordenite (syn MOR). </LI> <LI> The small nanoparticles of ∼50–80nm were self-assembled into a 2–3μm MOR. </LI> <LI> Intracrystalline mesoporous structure obtained without any acid/base treatment. </LI> <LI> ∼3–5nm mesopores were abundantly observed throughout the MOR nanoparticles. </LI> <LI> Syn MOR demonstrated 3–5 times higher efficiencies than conventional counterparts. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>A facile and template free hydrothermal synthesis of mesoporous mordenite (MOR) which demonstrated significantly enhanced catalytic efficiencies and selectivity due to large pore size (3–5nm).</P> <P>[DISPLAY OMISSION]</P>
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Impulse Buying Behavior in Distribution Centers of Kathmandu
Bharat RAI, Rewan Kumar DAHAL, Bhupendra Jung SHAHI, Binod GHIMIRE 한국유통과학회 2023 유통과학연구 Vol.21 No.5
Purpose: The study's primary objective was to pinpoint the variables impacting consumers' impulsive purchasing decisions in the distribution centers in Kathmandu, the capital city of Nepal. Research design, data, and methodology: The independent variables used to identify consumer impulse buying behavior were the in-store displays, store employee behavior, reference groups, and promotional activities. A 6-point Likert scale questionnaire was employed for collecting the primary data from customers at the retail center of Kathmandu. The study's sample size was 396, employing a convenient sampling method. Statistical Package for the Social Sciences (SPSS) and Analysis of a Moment Structures (AMOS) have been used to show the relationships between dependent and independent variables. Results: The outcome of the path analysis using structural equation modeling demonstrates that in-store displays, reference groups, and store employees' behavior significantly influence the customers' impulse buying decisions in the distribution center. Additionally, it has been discovered that promotional activities have no significant impact on consumers' impulsive purchasing decisions made at the retail center of Kathmandu. Conclusions and Implications: The study's findings indicate that the actions of store personnel, reference groups, and in-store displays significantly contribute to the acceleration of impulsive purchases. Such findings provide researchers and business executives with a road map for the future.
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Patel Priya,Singh Shailesh,Patel Arvind Kumar,Kumar Bhupendra,Singh Arvind Kumar,Kumar Dinesh 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.2
Parthenium hysterophorus L. (Asteraceae) is a toxic weed of agricultural farms, pastures and wastelands with a pan-tropical distribution. The weed causes a reduction in crop production of agricultural fields and severe health problems in humans. The Mexican beetle, Zygogramma bicolorata Pallister (Coleoptera: Chrysomelidae) is among the most promising candidates for the weed biocontrol. However, no previous study has evaluated assimilation of nutrients in this beetle. In the present study, feeding attributes and assimilation of nutrients by larvae of Z. bicolorata were assessed on the weed. Results revealed that the first larval instars of Z. bicolorata exhibited lowest consumption rates, and accumulated minimum concentrations of glucose, proteins and triglycerides in their body. They showed compensatory feeding, and displayed highest food utilization efficiencies and developmental rates. In contrast, the fourth larval instars exhibited higher food consumption rates and conversion efficiencies, but displayed lowest developmental rates. Accumulation of food reserves was also recorded maximum for the fourth larval instars. Overall, the findings may aid current mass-rearing efforts for Z. bicolorata in laboratories, but field trials are still needed to strengthen the present findings.
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Performance and emission studies on an agriculture engine on neat Jatropha oil
Bhupendra Singh Chauhan,Naveen Kumar,조행묵 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.2
Diesel engines have proven their utility in the transportation, agriculture, and power sectors in India. They are also potential sources of decentralized energy generation for rural electrification. Concerns on the long-term availability of petroleum diesel and the stringent environmental norms have mandated the search for a renewable alternative to diesel fuel to address these problems. Vegetable oils have been considered good alternatives to diesel in the past couple of years. However, there are many issues related to the use of vegetable oils in diesel engine. Jatropha curcas has been promoted in India as a sustainable substitute to diesel fuel. This study aims to develop a dual fuel engine test rig for evaluating the potential suitability of Jatropha oil as diesel fuel and for determining the performance and emission characteristics of an engine with Jatropha oil. The experimental results suggest that engine performance using Jatropha oil is slightly inferior to that of diesel fuel. The thermal efficiency of the engine was lower, while the brake-specific fuel consumption was higher with Jatropha oil compared with diesel fuel. The levels of nitrogen oxides (NOx) from Jatropha oil during the entire duration of the experiment were lower than those of diesel fuel. The reduction of NOx was found to be an important characteristic of Jatropha oil as NOx emission is the most harmful gaseous emission from engines; as such, its reduction is always the goal of engine researchers and makers. During the entire experiment, carbon monoxide (CO), hydrocarbon (HC), and carbon dioxide (CO2) emissions in the case of using Jatropha oil were higher than when diesel fuel was used. The higher density and viscosity of Jatropha oil causes lower thermal efficiency and higher brakespecific fuel consumption. The performance and emission characteristics found in this study are significant for the study of replacing diesel fuel from fossils with Jatropha oil in rural India, where the availability of diesel has always been a problem.
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Tarun Kumar Patel,Rajesh Anand,Agam Prasad Singh,Jata Shankar,Bhupendra N. Tiwary 한국생물공학회 2014 Biotechnology and Bioprocess Engineering Vol.19 No.6
Present study describes the effect of temperatureand pH on biosynthesis of aflatoxin B1 (AFB1) to identifyatoxigenic (aflatoxin non-producer) isolates of Aspergillusflavus. An indigenous detection method for AFB1 wasdeveloped using tandem mass spectrometric method. Detection of AFB1 was carried out in positive polarityusing triple quadrapole mass spectrometer with electrosprayionization interface in Multiple Reaction Monitoring(MRM) mode. A total of four A. flavus isolates wereselected for screening of AFB1 biosynthesis at pH 4.0, 5.5,7.0, and 8.5 at 27°C. Highest AFB1 biosynthesis inMTCC11866 was found at pH 6.5 while in MTCC9367 itwas at pH 7.0. On screening AFB1 biosynthesis in A. flavusculture at various temperatures a significant suppression inAFB1 biosynthesis was found at 37°C in comparison to 24and 27°C in MTCC11866 and MTCC9367. AFB1 was notdetected in other two A. flavus isolates MTCC11580 andMTCC11588 at any temperature and pH tested. AFB1nonproducing isolates, MTCC11580 and MTCC11588could be used as potent biocontrol agent. Additionally,present standardized method for AFB1 detection may findits application in qualitative and quantitative analysis ofAFB1 contamination in food crop and other products.
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Singh, Bhupendra,Bhardwaj, Aman,Gautam, Sandeep K.,Kumar, Devendra,Parkash, Om,Kim, In-Ho,Song, Sun-Ju Elsevier 2017 Journal of Power Sources Vol.345 No.-
<P><B>Abstract</B></P> <P>Here we present a report on synthesis and characterization of tetravalent metal pyrophosphate (TMP) and alkali carbonate (A<SUB>2</SUB>CO<SUB>3</SUB>; A = Li and/or Na) composites. The TMP-carbonate composites are prepared by mixing indium-doped tin pyrophosphate or yttrium-doped zirconium pyrophosphate with Li<SUB>2</SUB>CO<SUB>3</SUB> or an eutectic mixture of Li<SUB>2</SUB>CO<SUB>3</SUB>-Na<SUB>2</SUB>CO<SUB>3</SUB> in different wt.% ratios. The phase composition, microstructure and electrical conductivity of the sintered specimen are analyzed. In addition, the effect of different TMP and A<SUB>2</SUB>CO<SUB>3</SUB> phases is investigated. A maximum ionic conductivity of 5.5 × 10<SUP>−2</SUP> S cm<SUP>−1</SUP> at 630 °C is observed in this study with a Sn<SUB>0.9</SUB>In<SUB>0.1</SUB>P<SUB>2</SUB>O<SUB>7</SUB>-Li<SUB>2</SUB>CO<SUB>3</SUB> composite. Based on the literature data, TMP-carbonate composites can be considered to be primarily a proton and oxygen-ion co-ionic conductor and, therefore, have strong potential as electrolytes in fuel cells in 500–700 °C range.</P> <P><B>Highlights</B></P> <P> <UL> <LI> New tetravalent metal pyrophosphate (TMP)-alkali carbonate composites are reported. </LI> <LI> TMP-carbonate composites sintered at 750 °C are dense. </LI> <LI> SIP21-L10 composite showed max. conductivity of 5.5 × 10<SUP>−2</SUP> S cm<SUP>−1</SUP> at 630 °C. </LI> <LI> Conductivity of TMP-carbonate is comparable to ceria-carbonate composites. </LI> </UL> </P>
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