Nonlinearity Induced Critical Coupling

We study a critically coupled system (Opt. Lett., \textbf{32}, 1483 (2007)) with a Kerr-nonlinear spacer layer. Nonlinearity is shown to inhibit null-scattering in a critically coupled system at low powers. However, a system detuned from critical coupling can exhibit near-complete suppression of scattering by means of nonlinearity-induced changes in refractive index. Our studies reveal clearly an important aspect of critical coupling as a delicate balance in both the amplitude and the phase relations, while a nonlinear resonance in dispersive bistability concerns only the phase

Genetics of SCMR AND SLA, the Traits Related To Drought Tolerance in Groundnut (Arachis hypogaea L.)

An investigation was carried out with the objectives, i) to unravel the nature of gene action for SCMR and SLA, the surrogate traits of drought tolerance and for yield and its contributing traits, ii) to assess the maternal effects for SCMR and SLA in selected parents and their F1 crosses and iii) to assess the carbon isotope discrimination (another surrogate of drought tolerance) among the parental genotypes. The investigation was carried out in alfisols of International Crops Research Institute for Semi-Arid Tropics (ICRISAT) during 2007 rainy season and 2007-08 post rainy season. The experimental material consisted of six-generations (P1, P2, F1, F2, B1, and B2) which were evaluated in randomized complete block design

Transmission of peanut yellow spot virus (PYSV) by Thrips, Scirtothrips dorsalis Hood in groundnut

Peanut yellow spot virus (PYSV) was efficiently transmitted by Scirtothrips dorsalis Hood in groundnut. Larvae could acquire the virus in 30 min and the maximum percentage transmission of 43.8% by individual insects resulted following two days AAP. Single adult Thrip transmitted the virus after minimum IAP of 30 minutes. The percentage transmission (33.3%) increased linearly with an increase in IAP up to 1.5 days and maximum up to 55 h of IAP (36.1%). PYSV persistently transmitted more than 75% of their life spa

Kharif Sorghum Germplasm Collection in Karnataka and Adjoining Areas

An assessment of the present world collection of sorghum maintained at ICRISAT reveals that the majority of the germplam constitute either experimental accessions which are generally photo insensitive or authentic indigenous races from tropical countries which are photosensitive. Most of the landraces assembled from tropical countries including India behave photoperiod sentitive when grown in a long day (rainy) seson at Patancheru (17 27'N latitude) indicating the lacking of early insensitive types especially from India. There are very few pockets in South India where early kharif types are cultivated among which Northern Karnataka and its adjoining areas are very important. These areas were not adequately collected in earlier missions and their valuble germplasm are facing severe threat from hybrid and improved sorghum varieties. More landraces from this region may provide valuable source material for sorghum improvement programs particularly for earliness probable resistance to drought (several areas are drought prone). They may also possess weathering resistance because of their maturity during rainy seaso

Evaluation of Hepatoprotective activity of fruits of Sesbania grandiflora L. Pers against thiocetamide and ranitidine induced hepatotoxicity in rats

The Petroleum ether extract of Sesbania grandiflora L. pers fruits showed a significant dose dependent (100mg, 200mg/kg p.o.) protective effect against thioacetamide and ranitidine induced hepatotoxicity in Wistar albino rats. The degree of protection was measured by using biochemical parameters like Serum glutamic oxaloacetic transaminase (SGOT), Serum glutamic pyruvic transaminase (SGPT), Alkaline phosphatase (ALP), Total bilirubin (BRN), Total Cholesterol (TC), Total protein and Histopathological alterations. The fruit extract completely prevented the toxic effects of Thioacetamide and Ranitidine on the above serum parameters. The petroleum ether extract of Sesbania grandiflora L. pers fruits produced significant protectio

Evaluation of Hepatoprotective activity of fruits of Sesbania grandiflora L. Pers against thiocetamide and ranitidine induced hepatotoxicity in rats

The Petroleum ether extract of Sesbania grandiflora L. pers fruits showed a significant dose dependent (100mg, 200mg/kg p.o.) protective effect against thioacetamide and ranitidine induced hepatotoxicity in Wistar albino rats. The degree of protection was measured by using biochemical parameters like Serum glutamic oxaloacetic transaminase (SGOT), Serum glutamic pyruvic transaminase (SGPT), Alkaline phosphatase (ALP), Total bilirubin (BRN), Total Cholesterol (TC), Total protein and Histopathological alterations. The fruit extract completely prevented the toxic effects of Thioacetamide and Ranitidine on the above serum parameters. The petroleum ether extract of Sesbania grandiflora L. pers fruits produced significant protectio

Dependence of Physical Parameters of Compound Semiconductors on Refractive Index

Interesting relationships have been found between refractive index, plasmon energy, electronic polarisability, bond length, microhardness, bulk modulus, force constants and lattice energy. An attempt has been made for the first time to correlate only one physical parameter with others. The calculated values are in good agreement with the experimental values as well as with the values reported in the literature. Refractive index data is the only one parameter required to estimate all the above parameters

Propagation of pure fetal and maternal mesenchymal stromal cells from terminal chorionic villi of human term placenta

Long term propagation of human fetal Mesenchymal Stromal Cells (MSC) in vitro has proven elusive due to limited availability of fetal tissue sources and lack of appropriate methodologies. Here, we have demonstrated the presence of fetal and maternal cells within the tips of Terminal Chorionic Villi (TCV) of normal human term placenta and we have exploited inherent differences in the adhesive and migratory properties of maternal vs. fetal cells, to establish pure MSC cultures of both cell types. The origin and purity of each culture was confirmed by X-Y chromosome-specific Fluorescence In Situ Hybridization (FISH) and Short Tandem Repeat (STR) genotyping. This is the first demonstration of fetal and maternal cells in the TCV of human term placenta and also of deriving pure fetal MSC cultures from them. The concomitant availability of pure cultures of adult and fetal MSC from one tissue provides a good system to compare genetic and epigenetic differences between adult and fetal MSCs and also to generate new models of cell based therapies in regenerative medicine