Browsing by Author "Kumar, Vikas"

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    Efficacy of Cow Urine as Plant Growth Enhancer and Antifungal Agent
    (Hindawi, 2015-10) Jandaik, Savita; Thakur, Preeti; Kumar, Vikas
    The present study was conducted to determine antifungal activity of three different concentrations (5, 10, and 15%) of cow urine against three fungal pathogens (Fusarium oxysporum, Rhizoctonia solani, and Sclerotium rolfsii) isolated from infected plants of Methi and Bhindi that showed symptoms of damping off and wilting disease by poison food technique. The extent of growth of test fungi in plates poisoned with cow urine was lesser when compared with the control plates. Among these concentrations cow urine at 15% concentration was most effective. When the three fungal organisms were compared, maximum growth suppression was observed in Fusarium oxysporum (78.57%) at 15% concentration of cow urine followed by Rhizoctonia solani (78.37%) and Sclerotium rolfsii (73.84%). Finally we concluded that the cow urine has antifungal activities and the inhibitory activity can be used in the control of fungi.The nutritional effect of cow urine on plant growth was also tested with Trigonella foenum-graecum (Methi) and Abelmoschus esculentus (Bhindi) plants and the chlorophyll and protein content was also estimated.
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    On the solutions of field equations due to rotating bodies in General Relativity
    (Polytech, 2017-12) Kumar, Vikas; Kaur, Lakhveer
    A metric, describing the field due to bodies in stationary rotation about their axes and compatible with a stationary electromagnetic field, has been studied in present paper. Using Lie symmetry reduction approach we have herein examined, under continuous groups of transformations, the invariance of field equations due to rotation in General Relativity, that are expressed in terms of coupled system of partial differential equations. We have exploited the symmetries of these equations to derive some ansatz leading to the reduction of variables, where the analytic solutions are easier to obtain by considering the optimal system of conjugacy inequivalent subgroups. Furthermore, some solutions are considered by using numerical methods due to complexity of reduced ordinary differential equations.