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Search Results: 1 - 10 of 8354 matches for " Surendra Dutt Sharma "
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Role of Silver Incorporation on the Specific Heat in Glassy Se80Te20 Alloy  [PDF]
Shipra Saraswat, Surendra Dutt Sharma
New Journal of Glass and Ceramics (NJGC) , 2014, DOI: 10.4236/njgc.2014.44009
Abstract: Specific heat measurements have been made in glassy Se80-xTe20Agx (0 ≤ x ≤ 15) alloys using differential scanning calorimetry (DSC) technique. An extremely large increase in the specific heat values has been observed at the glass transition temperature. It has also been found that the values of Cp below glass transition temperature and the difference of Cp values before and after glass transition (ΔCp) are highly composition dependent. This indicates that the incorporation of Ag in binary Se80Te20 alloy in the present study influences the structure of the binary alloy. Specific heat of the additive element Ag is found to be important for the observed changes in the specific heat of the ternary alloys as compared to binary alloy.
A New Record on Flowering in Harar (Terminalia chebula Retz.) Seedling  [PDF]
Kamal Sharma, Sanjeev Thakur, Seema Sharma, Som Dutt Sharma
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.35083
Abstract: Harar (Terminalia chebula), a large deciduous tree belongs to family combretaceae. It grows naturally in greater part of India up to 1500 m elevation. Due to several alkaloids present in fruit, it is used as laxative, purgative and astringent for curing a number of ailments. Keeping in view its medicinal and tanning properties, the authors have been working for the last two decades on various aspects like propagation and development of promising strains of harar. Grafting/budding techniques have been standardized to produce true to type precocious plants which bear flower in two to three years. However, flowering has been observed in three months old seedling, which can be ascribed to biochemical and/or cellular changes. Early flowering is a rare incidence in tree seedlings which otherwise could be very useful for breeding and early evaluation of fruit species.
Transient Waves Due to Thermal Sources in a Generalized Piezothermoelastic Half-Space  [PDF]
Jagan Nath Sharma, Anita Devi Thakur, Yogeshwar Dutt Sharma
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.33029
Abstract: This paper is devoted to the study of disturbances due to impact and continuous strip thermal sources, tem- perature or temperature gradient input acting on the rigidly fixed and charge free(open circuit) surface of a homogeneous, transversely isotropic, thermally conducting, generalized piezothermoelastic half-space. The Laplace and Fourier transforms technique have been employed to solve the model consisting of partial dif- ferential equations and boundary conditions in the transformed domain. In order to obtain the results in the physical domain the quadratic complex polynomial characteristic equation corresponding to the associated system of coupled ordinary differential equations has been solved by using DesCartes’ algorithm with the help of irreducible Cardano’s method. The inverse transform integrals are evaluated by using numerical technique consisting of Fourier series approximation and Romberg integration. The temperature change, stresses and electric potential so obtained in the physical domain are computed numerically and presented graphically for cadmium selenide (CdSe) material. The study may find applications in smart structures, pie- zoelectric filters, resonators, transducers, sensing devices and vibration control.
Image section: Radiology corner - Answer
Vishal Sharma,Surendra Rajpal
Calicut Medical Journal , 2009,
Abstract:
Image section: Radiology corner - Question
Vishal Sharma,Surendra Rajpal
Calicut Medical Journal , 2009,
Abstract:
Antioxygenic Activity of Solanum nigrum L. Leaves in Sunflower Oil Model System and Its Thermal Stability  [PDF]
Ananthan Padmashree, Gopal Kumar Sharma, Anil Dutt Semwal, Chitrashekarachar Mahesh
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.511113
Abstract: The antioxygenic activity of Solanum nigrum L. leaves and its various solvent extracts were evaluated using sunflower oil model system. Leaf powder and its methanol/water (80:20) soluble fraction showed strong antioxygenic activity in refined sunflower oil. On the other hand, ethyl acetate fraction exhibited marginal antioxygenic activity, whereas the water soluble fraction was practically devoid of any activity in refined sunflower oil. Thermal stability of different extracts of Solanum nigrum L. leaves heated at 80?C in refined sunflower oil also indicated the strong efficacy of methanol/water (80:20) extract to inhibit thermal oxidation. Solanum nigrum L. contain high levels of magnesium (239.0 mg/100g) and phosphorous (80.3 mg/100g). Fatty acid analysis of the lipid extracted from Solanum nigrum L. leaves indicated the presence of linoleic (59.1%) as a major fatty acid. The result of this study confirmed the presence of antioxygenic compounds in leaves, in particular its methanol/water (80:20) extracts showed great potential as a natural antioxidant to inhibit lipid peroxidation in foods.
Phenolic Acids from Parthenium hysterophorus: Evaluation of Bioconversion Potential as Free Radical Scavengers and Anticancer Agents  [PDF]
Richa Panwar, Asvene Kumar Sharma, Dharm Dutt, Vikas Pruthi
Advances in Bioscience and Biotechnology (ABB) , 2015, DOI: 10.4236/abb.2015.61002
Abstract: Parthenium hysterophorus is a globally recognized invasive alien weed that prominently colonizes grazing areas and cultivated lands causing adverse effect on crop production. Major allelochemicals released from parthenium include sesqueterpene lactones and phenolic acids. Among these the presence of caffeic, vanillic and ferulic acids is of industrial significance as they possess potent free radical scavenging and anticancer activities. This study reports for the first time, high total phenolic acid content (20.82 ± 0.82 mg GAE/g dry sample) in parthenium. The GC-MS analysis indicated the presence of ferulic, p-coumaric, vanillic and gallic acid as major phenolic components. Free radical scavenging activity of the phenolic acids extract gave an EC50 value 130.4 μg/ml when measured using DPPH assay. Anticancer activity of parthenium phenolic extract against A-498 (IC50 0.5237 μg/ml) and MDA-MB231 (IC50 and 0.2685 μg/ml) cancerous cell lines indicated its potential to be used as anticancer agent.
Quantifying Reusability of Object Oriented Design: A Testability Perspective  [PDF]
Mahfuzul Huda, Yagya Dutt Sharma Arya, Mahmoodul Hasan Khan
Journal of Software Engineering and Applications (JSEA) , 2015, DOI: 10.4236/jsea.2015.84018
Abstract: The quality factor of class diagram is critical because it has a significant influence on overall quality of the product, delivered finally. Testability analysis, when done early in the software creation process, is a criterion of critical importance to software quality. Reusability is an important quality factor to testability. Its early measurement in object oriented software especially at design phase, allows a design to be reapplied to a new problem without much extra effort. This research paper proposes a research framework for quantification process and does an extensive review on reusability of object oriented software. A metrics based model “Reusability Quantification of Object Oriented Design” has been proposed by establishing the relationship among design properties and reusability and justifying the correlation with the help of statistical measures. Also, “Reusability Quantification Model” is empirically validated and contextual significance of the study shows the high correlation for model acceptance. This research paper facilitates to software developers and designer, the inclusion of reusability quantification model to access and quantify software reusability for quality product.
Metric Based Testability Estimation Model for Object Oriented Design: Quality Perspective  [PDF]
Mahfuzul Huda, Yagya Dutt Sharma Arya, Mahmoodul Hasan Khan
Journal of Software Engineering and Applications (JSEA) , 2015, DOI: 10.4236/jsea.2015.84024
Abstract: The quality factor of class diagram is critical because it has significant influence on overall quality of the product, delivered finally. Testability has been recognized as a key factor to software quality. Estimating testability at design stage is a criterion of crucial significance for software designers to make the design more testable. Taking view of this fact, this paper identifies testability factors namely effectiveness and reusability and establishes the correlation among testability, effectiveness and reusability and justifies the correlation with the help of statistical measures. Moreover study developed metric based testability estimation model and developed model has been validated using experimental test. Subsequently, research integrates the empirical validation of the developed model for high level acceptance. Finally a hypothesis test performs by the two standards to test the significance of correlation.
Protective effect of Heliotropium eichwaldi against cisplatin-induced nephrotoxicity in mice
Surendra Kr. Sharma,Naveen Goyal
Zhong Xi Yi Jie He Xue Bao , 2012,
Abstract: OBJECTIVE: The aim of the present study was to evaluate the nephroprotective effect of methanolic extract of Heliotropium eichwaldii (MHE) in mice with cisplatin-induced acute renal damage.METHODS: Nephrotoxicity was induced by a single intraperitoneal injection of cisplatin (16 mg/kg). Swiss albino mice were injected with vehicle, cisplatin, cisplatin plus MHE 200 mg/kg and cisplatin plus MHE 400 mg/kg, respectively. MHE was administered for 7 d at a dose of 200 and 400 mg/kg per day orally starting 4 d before cisplatin injection. Animals were sacrificed 3 d after treatment and blood as well as kidney tissue was isolated and analyzed. The various parameters such as blood urea nitrogen (BUN), serum creatinine (CRE), malondialdehyde (MDA), and catalase (CAT) and superoxide dismutase (SOD) activities were analyzed.RESULTS: MHE treatment significantly reduced BUN and serum CRE levels elevated by cisplatin administration (P<0.05). Also, it significantly attenuated cisplatin-induced increase in MDA level and improved the decreased CAT and SOD activities in renal cortical homogenates (P<0.05). Additionally, histopathological examination and scoring showed that MHE markedly ameliorated cisplatin-induced renal tubular necrosis.CONCLUSION: MHE can be considered a potential candidate for protection of nephrotoxicity induced by cisplatin.
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