University of Rajasthan

About: University of Rajasthan is a education organization based out in Jaipur, India. It is known for research contribution in the topics: Chemical shift & Derivative (chemistry). The organization has 15058 authors who have published 15733 publications receiving 117400 citations. The organization is also known as: Rajasthan University.

Reversible contraception like activity of embelin in male dogs (Canis indicus Linn).

Abstract: Zusammenfassung Reversible contraceptions-ahnliche Aktivitat von Embelin bei mannlichen Hunden (Canis indicus Linn) In einer experimentellen Studie an Ruden (Canis indicus Linn) wurde die Wirkung von Embelin aus der Familie der Myrsinazeen als reversibles Contraceptivum uberpruft (2,5-hydroxy 3-undicyl-1,4-benzochinon); uber diese Substanz ist bereits verschiedentlich im Zusammenhang einer postcoitalen Antifertilitatsaktivitat und einer Antiimplantationsaktivitat bei Ratten berichtet worden. Die Hunde erhielten uber 100 Tage 80 mg/kg Korpergewicht jeden zweiten Tag. Es wurde ein Ruckgang des Hodengewichtes und der spermatogenetischen Elemente im Hoden beobachtet. Die Nebenhoden waren frei von Spermatozoen, wahrend die funktionelle Morphologie unbeeinflust blieb. 250 Tage einer Genesung brachten eine normale Spermatogenese mit allen Zellstadien. Das Nebenhodenmilieu zeigte eine normale Physiologie. Die sexuelle Potenz und die Libido der Tiere war unverandert. Es wird ausdrucklich betont, das die Anwendung des pflanzlichen Benzochinons Embelin durchaus vielversprechend fur eine reversible Contraception beim mannlichen Geschlecht sei.

Optimization of nutrient levels in the medium increases the efficiency of callus induction and plant regeneration in recalcitrant indian barley (hordeum vulgare l.) in vitro

Abstract: The present study reports that a revised nutrient concentration in the basal medium improved shoot bud induction and subsequent plant regeneration in barley (Hordeum vulgare L. var. BL-2). Cultures were raised from immature embryos on MSB5 medium supplemented with picloram. Concentrations of five nutrients were varied. The effect of these nutrients was investigated on (1) induction, (2) induction and subculture, and (3) induction, subculture and regeneration stages. The basal MSB5 medium was not optimal for each phase of barley culture. Decreased ammonium nitrate, increased potassium dihydrogen phosphate, sodium molybdate, cobalt chloride, and addition of glycine enhanced shoot bud induction and plant regeneration. The different media that were optimal for immature embryo culture were: MSB5 medium supplemented with 20.70 μM picloram, 10.30 mM NH4NO3, 6.25 mM KH2PO4, 2.06 μM Na2MoO4, 0.55 μM CoCl2, and 26.64 μM glycine (for induction); MSB5 medium supplemented with 12.47 μM picloram, 10.30 mM NH4N...

Evolution of slaty cleavage in relation to diagenesis and metamorphism: A study from the Hunsrückschiefer

Abstract: Detailed studies of the Hunsruckschiefer (Rheinisches Schiefergebirge), collected from the Katzenberg Mine, southeast of Mayen (West Germany), indicate that the slaty cleavage fabric is represented by a variety of morphologic features. These include anastomosing thin films of layer silicates separating narrow lenses of rock matrix, the preferred dimensional orientation of flat grains of quartz, feldspar, and calcite occurring in the rock matrix bounded by films of layer-silicate minerals, and beardlike growth of chlorite, muscovite, and other minerals on those surfaces of quartz and other host minerals that make a high angle with the cleavage direction. Other features that help to define cleavage in slates are “seamlike” bunches of muscovite crowded with opaque minerals in metasiltstone layers and silty dikelike bodies in metaclaystone layers. There are also some veins of quartz-chlorite-calcite parallel to the direction of cleavage. Evidence of mobilization of silty and clayey materials along cleavage planes and the presence of silty dikes along the cleavage planes suggest that the cleavage-forming deformation began during the prelithification stage of the rocks. The deformation at this stage, besides developing seams of muscovite, also caused formation of weak anistropy by mechanical rotation of detrital micas to the planes of cleavage. The earliest feature to develop following lithification and early diagenesis is the beardlike growth of chlorite, muscovite, and rutile on different host minerals. The layer-silicate films appeared in the rocks following growth of chlorite-muscovite porphyroblasts, in the earliest metamorphism of the rocks. It is argued that these films evolved through the development of fractures (which also pass through the chlorite-muscovite porphyroblasts), coupled with re-crystallization following Riecke's principle. Further readjustments in the rocks caused flattening of minerals like quartz, feldspar, and calcite through solution. The veins of quartz-chlorite-calcite were the last to form in the rocks.

Estimation of triterpenoids from Heliotropium marifolium Koen. ex Retz. in vivo and in vitro. I. Antimicrobial screening

Abstract: The hexane extract of Heliotropium marifolium yielded a mixture of triterpenoids: beta-sitosterol, stigmasterol, beta-amyrin, friedelan-3beta-ol (epifriedelenol), cycloartenone, beta-amyrin acetate, friedelin and epifriedenyl acetate. Isolated triterpenoid and reference antibiotics (gentamycin/mycostatin) were tested against selected pathogenic bacteria and fungi, e.g. Escherichia coli, Staphylococcus aureus, Aspergillus niger and Penicillium chrysogenum. The inhibition zone (IZ) and the activity index (AI) of isolated compounds were recorded and it was found that epifriedenyl acetate (IZ = 17; AI = 1.06) was the most active. The present study deals with the quantification and assessment of their growth inhibitory potency. It has been reported that cycloartenone was the major triterpenoid in both in vivo (0.54%) and in vitro (0.11%) cell cultures.