oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2018 ( 1 )

2017 ( 58 )

2016 ( 96 )

2015 ( 655 )

自定义范围…

匹配条件: “ Devendra Singh2” ,找到相关结果约17520条。
列表显示的所有文章,均可免费获取
第1页/共17520条
每页显示
Formulation and Characterization of Transdermal Patches of Losartan
Ujjawal Nautiyal*1, Devendra Singh2
Indian Journal of Pharmaceutical and Biological Research , 2013,
Abstract: Administration of drugs through skin has received great attention through the last decade. Hence this study aims to formulate an anti-hypertensive drug losartan as transdermal patch using different bioadhesive polymers such as ethyl cellulose, cellulose acetate, and polyvinyl pyrrolidon,hydroxyl propylemethylcellulose with plasticizers propylene glycol (PG). Patches were prepared though solvent evaporation method, The backing membrane was a non permeable aluminium foil laminated with polyethylene and evaluated for thickness uniformity, Uniformity of weight, Scanning Electron Microscopy, Surface pH, Swelling studies, Drug content uniformity Effect on agingn, skin irritation potential, and In vitro release study.Patches exhibited controlled release over more than 2 hr.It was concluded that patches containing 30 mg of losartane with HPMC (formulation F2) ,showed moderate swelling, surface pH and controlled drug release, thus can be selected for the development of transdermal patches for effective uses.
Improving students’ understanding of quantum measurement. II. Development of research-based learning tools
Guangtian Zhu1,2,Chandralekha Singh2
Physical Review Special Topics. Physics Education Research , 2012,
Abstract: We describe the development and implementation of research-based learning tools such as the Quantum Interactive Learning Tutorials and peer-instruction tools to reduce students’ common difficulties with issues related to measurement in quantum mechanics. A preliminary evaluation shows that these learning tools are effective in improving students’ understanding of concepts related to quantum measurement.
Improving students’ understanding of quantum measurement. I. Investigation of difficulties
Guangtian Zhu1,2,Chandralekha Singh2
Physical Review Special Topics. Physics Education Research , 2012,
Abstract: We describe the difficulties that advanced undergraduate and graduate students have with quantum measurement within the standard interpretation of quantum mechanics. We explore the possible origins of these difficulties by analyzing student responses to questions from both surveys and interviews. Results from this research are applied to develop research-based learning tutorials to improve students’ understanding of quantum measurement.
Chilli little leaf - A new phytoplasma disease in India
D. SINGH1 and S.J. SINGH2
Indian Phytopathology , 2012,
Abstract: During 1996-97, a disease causing small leaves on chilli (Capsicum annuum) cv. Pusa Jwala was observed around Varanasi, Uttar Pradesh. Other symptoms include malformation and proliferation of axillary buds. Infected plants had many abnormally filiformed small leaves which failed to attain full size. Flower buds were upright instead of pendulous. As the disease progressed, all the freshly produced flowers became phylloid and leaves became progressively smaller. Infected plants did not bear fruits and early infection caused 100% yield loss. Studies showed that the disease is caused by a phytoplasma and is transmitted by grafting.
Traffic Generation Model for Delhi Urban Area Using Artificial Neural Network
Shivendra Goel,J. B. Singh2,Ashok Kumar Sinha
BVICAM's International Journal of Information Technology , 2010,
Abstract: Transport facility and socio-economic structure for a city are interdependent resulting into improved transport infrastructure, which in turn influences socio-economic growth. As the society evolves it generates transport demand. The classical transportation planning methods are based on simple extrapolation of trends. Some mathematical models like linear regression models have also been used by researchers for estimating traffic generation for future period, however, these models do not account for nonlinearly in the model. In the present paper Artificial Neural Network Model has been used in modal Traffic Generation in Delhi Urban Area .ANN models account for nonlinear relationship between independent variables and the dependent variables. Future estimates of percentage of traffic generation by cars, buses and smaller vehicles in the inner, middle and outer areas of urban Delhi have been derived using the ANN. The model is implemented on MATLAB and the error in the training phase of ANN is quite low.
Phytochemical Investigation, Isolation and Characterization of Betulin from Bark of Betula Utilis
Himanshu Joshi,Gyanendra Kumar Saxena,Vikas Singh2 ,,Ekta Arya
Journal of Pharmacognosy and Phytochemistry , 2013,
Abstract: Betula utilis is a hardy perennial plant of moderate size up to 20 M in height, forming the upper limit of forest vegetation. It inhabitates along the Himalayan range from Bhutan westwards, ascending to an altitude of 4200 M. The bark of Betula utilis contains sitosterol, betulin, betulic acid, oleanolic acid, acetyloleanolic acid, lupeol, lupenone, methyl betulonate, methyl betulate and a new triterpenoid karachic acid. The ethanolic extract of powdered drug of Betula utilis was prepared. Most of the constituents were found to be present in the ethanolic extract. Thus it was concluded that constituents of Betula utilis bark are more soluble in polar solvents. The ethanolic extract showed the presence of alkaloids, carbohydrates, flavonoids, saponins and triterpenes. After identification of crude extract, the main work was to isolate the desired compound (betulin). So, fractionation of ethanolic extract was done by suspending it in water and then extracted it with n-hexane and dichloromethane. Betulin was isolated from dichloromethane fraction using column chromatography. Ethyl acetate and n-hexane in various ratios (1:10; 1:5; 1:3; 1:2) was used as eluent for separation of desired compound from the dichloromethane fraction. After isolation of desired compound, it was subjected to characterization. For characterization studies; melting range, TLC and spectroscopic techniques (UV, IR, Mass and NMR) were utilized.
New host records of Cercosporoids from medicinal plants of Madhya Pradesh
P.K. GUPTA1*, DHIRENDRA SINGH2, N.D. SHARMA1 and YOGITA GHARDE3
Indian Phytopathology , 2011,
Abstract:
Tuber treatment with imidacloprid is effective for control of potato stem necrosis disease
R.B. SINGH2, S.M. PAUL KHURANNA, S.K. PANDEY2 and K.K. SRIVASTAVA1
Indian Phytopathology , 2012,
Abstract: For chemical control of potato stem necrosis disease [?potato stem necrosis virus] (PSNV), experiments were conducted over 5 years (1993-94 to 97-98) in India with sprays of either monocrotophos/malathion, or soil applications of phorate, carbofuranand/or seed tuber treatment with imidacloprid, a new systemic insecticide. Of the treatments tested, 10 min. dip of seed tubers in 0.1% solution of imidacloprid reduced disease incidence (DI) by 60-74% and the disease index (DX) by 67-81% and enhanced tuber yields by 15-43%. Control of PSNV was equally effective through seed treatment with 0.1% 'Confidor' solution. Three fortnightly sprays of monocrotophos reduced DI by 70% and DX by 84% but enhanced yield by only 24%.
Effect of extracts, leachates and washings from potato virus X infected potato leaves on aggressiveness of Alternaria solani
A. KALRA1*, R.K. GROVERI1, N. RISHI1, S.M. PAUL KHURANA and B.P. SINGH2
Indian Phytopathology , 2012,
Abstract: The influence of potato virus X (PVX) infection on the germination of Alternaria solani spores and its aggressiveness was investigated in vitro. Extracts, leachates and washings from PVX-infected potato (cv. Kufri Chandramukhi) leaves suppressed thegermination of A. solani spores. Likewise, aggressiveness of A. solani was also reduced as the lesions formed on potato leaves were fewer and smaller when A. solani spores were mixed with extracts, leachates and washings from PVX-infected leaves in comparison with A. solani spores alone. Increased resistance of PVX infected leaves appeared to be related to fungitoxic compounds produced on or near the surface of the leaves.
TGF-β1 Improves Articular Cartilage Damage in Rabbit Knee
N. K. Singh, S. Shiwani1, G. R. Singh2, D. K. Jeong3, P. Kinjavdekar4, Amarpal4, J. D. Lohakare and S. J. Lee*
Pakistan Veterinary Journal , 2012,
Abstract: The present study was designed to assess the role of TGF-β1 in cartilage repair in an in vivo model of articular cartilage defect in rabbit. Twenty four New Zealand white rabbits of either sex, 6-7 months old (1-2 kgs) were divided into two groups i.e. A (Control) or B (TGF-β1). The articular cartilage defect of 3mm diameter and 2mm depth was created in the femoral groove of femoropatellar joint. Animals of both the groups were provided with collagen scaffolds at 10μg/cm2 in the articular defect. However, Group B animals were further provided with 20ng/20μl of TGF- β1 in the defect stuffed with collagen scaffold. Articular defect grossly appeared re-surfaced completely and healed with better joint movement in group B as compared to the animals of group A. Repaired articular surface maintained the transparency and sheen as hyaline cartilage. Synthesis of proteoglycans, enhanced filapodia activity, significant increase in the collagen type II and aggrecan in the repaired tissue further supports that TGF-β1 at the tested dosage improved the articular cartilage management and repair.
第1页/共17520条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.