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.

Effect of solvent and subsequent thermal annealing on the performance of phenylenevinylene copolymer: PCBM solar cells.

Abstract: The morphology of the photoactive layer used in the bulk heterojunction photovoltaic devices is crucial for efficient charge generation and their collection at the electrodes. We investigated the solvent vapor annealing and thermal annealing effect of an alternating phenylenevinylene copolymer P:PCBM blend on its morphology and optical properties. The UV−visible absorption spectroscopy shows that both solvent and thermal annealing can result in self-assembling of copolymer P to form an ordered structure, leading to enhanced absorption in the red region and hole transport enhancement. By combining the solvent and thermal annealing of the devices, the power conversion efficiency is improved. This feature was attributed to the fact that the PCBM molecules begin to diffuse into aggregates and together with the ordered copolymer P phase form bicontinuous pathways in the entire layer for efficient charge separation and transport. Furthermore, the measured photocurrent also suggests that the space charges no lon...

Micropropagation of Pithecellobium dulce (Roxb.) Benth—a multipurpose leguminous tree and assessment of genetic fidelity of micropropagated plants using molecular markers

Abstract: An efficient and reproducible protocol has been developed for in vitro propagation of Pithecellobium dulce (Roxb.) Benth (a multipurpose leguminous tree) from field grown nodal segments (axillary bud). Shoot bud induction occurred from nodal explants of 15-years-old tree on Murashige and Skoog (MS) basal medium supplemented with 4.4 μM 6-benzyladenine (BA) and multiplication was achieved on MS medium supplemented with 4.4 μM BA + 0.73 μM phenylacetic acid (PAA) i.e. up to 7 shoot buds in the period of 5–6 weeks. Addition of adenine sulphate (AdS) to this medium further enhanced the number of shoot buds up to 10. Proliferating shoot cultures were established by repeatedly subculturing primary culture on fresh medium (MS + 4.4 μM BA + 0.73 μM PAA) after every 25 days. In vitro rooting was achieved on MS medium supplemented with 2.46 μM Indole-3-butyric acid (IBA) + 41.63 μM activated charcoal (AC). The micropropagated shoots with well developed roots were acclimatized in green house in pots containing sand, soil and manure (1:1:1). Genetic stability of micropropagated clones was evaluated using Random amplified polymorphic DNA (RAPD) and Inter simple sequence repeat (ISSR) markers. The amplification products were monomorphic in micropropagated plants and similar to those of mother plant. No polymorphism was detected revealing the genetic uniformity of micropropagated plants. This is the first report of an efficient protocol for regeneration of P. dulce through organogenesis, which can be used for further genetic transformation and pharmaceutical purposes.

Antifertility and antimicrobial studies of pharmaceutically important organolead(IV) complexes of phenanthrolines

Abstract: The present study deals with a brief description of antifertility and antimicrobial aspects along with the spectral characterization of lead(IV) complexes. The testicular sperm density, testicular sperm morphology, sperm motility, density of cauda epididymal spermatozoa and fertility in mating trails and biochemical parameters of reproductive organs of an interesting class of biologically potent complexes on male albino rats at the dosages have been examined and discussed. Lead(IV) complexes have been synthesized using amino acids and 1,10-phenanthroline, 4,7-phenanthroline or 1,7-phenanthroline. A series of di- and tri-organolead(IV) [LPbRnL′] and [LPbClRnL′] complexes where, L = amino acid (tyrosine and phenylalanine) and L′ = 1, 10-phenanthroline, 4,7-phenanthroline or 1,7-phenanthroline and n = 2 or 3 have been prepared by the conventional methods. Structure elucidation has been done by IR, UV, 1H, 13C and 207Pb NMR spectroscopy. On the basis of spectral evidences, it has been concluded that the carboxylic acid of the amino acid is behaving as a monodentate ligand in all these complexes and the complexes are octahedral in shape with a coordination number six around the lead atom. The complexes have been screened against a number of fungi and bacteria to assess their growth inhibiting potential. Lead complexes incorporating the chelating 1,10-phenanthroline ligand showed a range of activities. The metal free non-chelating ligands 1,7-phenanthroline and 4,7-phenanthroline were inactive and the complexes derived from 1,7-phenanthroline displayed only marginal activity. Copyright © 2006 John Wiley & Sons, Ltd.

Hematological Changes due to Vitamin C Deficiency in Channa Punctatus Bloch

Abstract: Hematological changes in Channa punctatus based on examination of blood at regular monthly intervals in fishes fed a vitamin C-deficient diet for 210 days followed by 30 days' recovery treatment have been reported. Normochromic normocytic type of anemia was observed after 120 days of vitamin C deficiency which developed into a normochromic macrocytic type eventually becoming hypochromic macrocytic during the last 30 days of deficiency. Correlated erythropoietic studies revealed a decrease in small lymphoid hemoblast with simultaneous increase in the later stages of red blood cell development. Deficiency also resulted in leukocytosis, basically due to thrombocytosis. Differential leukocyte counts revealed relative decrease in all other cell types particularly neutrophils and lymphocytes. Recovery treatment was found effective in arresting and in most cases reversing the pathological trends set in by the deficiency.