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Baraut, India

Malik H.K.,Indian Institute of Technology Delhi | Kumar R.,Indian Institute of Technology Delhi | Kumar R.,Janta Vedic College | Lonngren K.E.,University of Iowa
IEEE Transactions on Plasma Science

Analytical investigations are carried out for the soliton propagation and reflection in a magnetized positiveionnegative-ion plasma having two types of electrons based on the reductive perturbation technique. It is found that this type of plasma does not support rarefactive solitons, which are otherwise found to propagate in negative-ion-containing plasmas with isothermal electrons. This is the consequence of the lowtemperature electron component present in the plasma. Two types of compressive solitons, namely, the fast wave soliton and the slow wave soliton, are found to exist, but only the fast compressive solitons will reflect. The effect of ion temperature is to enhance the soliton reflection; the same is the case for an increased number of negative ions. However, the effect of low-temperature electrons is to weaken the soliton reflection. Interestingly, the solitons are found to downshift after their reflection, and this shift is less under the effects of stronger magnetic field, smaller wave propagation angle, and a higher concentration of low-temperature electrons. However, larger amplitude solitons are more downshifted, and the shift is more for higher ion temperature and when the wave propagates with larger phase velocity. © 2010 IEEE. Source

Kumar S.,National Dairy Research Institute | Dagar S.S.,National Dairy Research Institute | Mohanty A.K.,National Dairy Research Institute | Sirohi S.K.,National Dairy Research Institute | And 5 more authors.

Methanogens, the members of domain Archaea are potent contributors in global warming. Being confined to the strict anaerobic environment, their direct cultivation as pure culture is quite difficult. Therefore, a range of culture-independent methods have been developed to investigate their numbers, substrate uptake patterns, and identification in complex microbial communities. Unlike other approaches, fluorescence in situ hybridization (FISH) is not only used for faster quantification and accurate identification but also to reveal the physiological properties and spatiotemporal dynamics of methanogens in their natural environment. Aside from the methodological aspects and application of FISH, this review also focuses on culture-dependent and -independent techniques employed in enumerating methanogens along with associated problems. In addition, the combination of FISH with micro-autoradiography that could also be an important tool in investigating the activities of methanogens is also discussed. © 2011 Springer-Verlag. Source

Effect of in vivo administration of PRL on tumor progression as monitored by increase in body weight significantly accelerated tumor progression. Administration of PRL also reduced the survival time of DL bearing mice incubation of DL Cells in vitro with PRL resulted in a remarkable enlargement in cell size in culture compared to cells incubated in medium alone. PRL treated DL Cells resulted in enhanced expression of protein. Source

Bind D.,Janta Vedic College | Dwivedi V.K.,Janta Vedic College
Indian Journal of Agricultural Research

M1 generation of cowpea [Vigna unguiculata (L) Walp] was raised by treating the dormant seeds were studied in the two genotype of cowpea variety Pusakomal and V-240(Rambha).With varied concentration of gamma rays (Gy), Ethyl methane sulphate (EMS ) and their combined treatments(Gy+ EMS). The mutagenic treatments seeds were tested for lethal dose 50 % for all mutagens, separately and the dose at which 50 % of the seed germination was considered as LD50 values. Gamma rays, EMS and combined mutagens are produced a high frequency as well as a wide 50 % spectrum of mutation. The frequency of mutation was more in combined treatments than gamma rays and EMS. The mutagenic effectiveness and efficiency was calculated based on biological damage. In M1 generation based on seed lethality (L) and seedling injury (I) and M2 generation was carefully screened for various chlorophyll and viable mutations. Mutagenic effectiveness and efficiency increased with the decreased in dose or concentration. In the present study EMS was provided to be more effective and efficient in causing mutations as compared to gamma rays and the combined treatments. A dose dependant decrease was noticed in most of the characters in M1 generation. The results indicated that the reduction in germination present over control was noticed in all mutagenic treatments in both the cultivars, while increased pollen sterility was associated with corresponding increases in dose per concentration of mutagens. Results indicated that higher doses were more effective. Source

Chauhan S.K.,Janta Vedic College | Chauhan S.K.,Indian Council of Agricultural Research | Mohan J.,Janta Vedic College
Indian Journal of Horticulture

A set of 20 bay corn cultivars was evaluated for variability and genetic advance for 20 quantitative characters. Five traits viz., days to first and last cob picking interval, husked cob yield/plant, husked yield/plant, harvest index and tassel weight/plant exhibited high values of phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV). Stalk weight, biological yield, husked cob yield/plant, husk yield/plant, fodder yield/plant and plant height expressed high heritability accompanied with high genetic advance indicating that additive gene action governed the expression of these traits. Two traits viz., days to first and last cob picking interval and single de-husked cob weight showed lower values for both heritability and genetic advance. Two maize genotypes, viz., HM 4 and HQPM 1 were found suitable for baby corn cultivation. Source

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