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.

Thermal conduction in a homogeneous two-phase system

Abstract: Assuming a regular geometry of dispersed phase (λ 2) an integrated theory for the effective thermal conductivityλ e of all kind of two-phase materials (including loose materials) is developed. The flux modification is carried out by considering the effective neighbouring interactions in the solution of Poisson’s equation. A comparison of calculatedλ e values with the reported experimental results over a wide range of two-phase materials shows a good agreement.

The Classification of the Hyphomycetes

Abstract: The classification of the Hyphomycetes is discussed with special reference to spore types conidiophore behaviour and initiation and development of spores. Eight basic morphological spore types are recognized : the blastospore, the gangliospore, the phialospore, the porospore, the arthrospore, the meristem-arthrospore, the spiculospore and the chlamydospore. No taxonomic significance is attached to the chlamydospore. It is pointed out that the forms now placed in the Mucedinaceae the Dematiaceae , the Tuberculariaceae and the Stilhaceae of Saccardo may be placed in six Families as suggested by the author earlier : (i) the Torulaceae (Type genus, Tonila Pers. ex Fries) for forms producing blastospores ; (ii) the Bactridiaceae (Type genus, Bactridium Kunze ex Fries) for those producing gangliospores ; (iii) the Tuberculariaceae (Type genus, Tubercularia Tode ex Fries) for those producing phialospores ; (iv) the Helminthosporiaceae (Type genus, Helminthosporium Link ex Fries) for those producing porospores ; (v) the Geotrichaceae (Type genus, Geotrichum Link ex Sacc.) for those producing arthrospores ; and (vi) the Coniosporiaceae (Type genus, Coniosporium Link ex Fries) for those producing meristem-arthrospores. The Families are subdivided into Sections on the basis of characters of the conidiophore related to spore initiation and development, the presence or absence and nature of "sporogenous cells", the presence or absence of "separating cells" and certain distinct modes of spore formation which are outlined. Twenty-four Sections are delimited and tentatively keyed out : thirteen in the Torulaceae, four in the Bactridiaceae , two each in the Tuberculariaceae the Helminthosporiaceae and the Geotrichaceae , and one in the Coniosporiacea e. A separate Section is provisionally suggested for forms producing spiculospores. Typical examples of genera for each Section are given together with illustrations. Some of the difficulties still requiring solution are mentioned, including those relating to speculations about the classification of the Hyphomycetes vis-a-vis their perfect stages so far as known. It is emphasized that critical and thorough studies on generic types inadequately or imperfectly understood are an urgent necessity.

Reversible azoospermia by oral administration of the benzene chromatographic fraction of the chloroform extract of the seeds of Carica papaya in rabbits.

Abstract: Contraceptive efficacy, reversibility and toxicity, if any, of the benzene, chloroform and ethyl acetate chromatographic fractions of the chloroform extract of the seeds of Carica papaya have been investigated in adult male rabbits at a dose regimen of 50 mg/animal/day for 150 days of treatment. Body weight, semen analysis, hematology, serum clinical biochemistry and the fertility status of control and treated animals were evaluated. Chloroform and ethyl acetate chromatographic fractions did not produce appreciable changes in these parameters. However, the benzene chromatographic fraction resulted in uniform azoospermia after 15 days of treatment, which was maintained for the remainder of the 150-day observation period. The levels of fructose, glycerophosphocholine, acid phosphatase and lactate dehydrogenase in the seminal plasma were within the control range. Hematology and the serum clinical parameters showed no appreciable changes, indicating lack of toxicity. The libido of the treated animals was normal and the fertility rate was zero. Complete normalcy of altered parameters was observed 60 days following withdrawal of treatment. It is concluded that the benzene chromatographic fraction of the chloroform extract of the seeds of Carica papaya possesses reversible male contraceptive potential and the effects appear to be mediated through the testis.

Organotin(IV) and organolead(IV) complexes as biocides and fertility regulators: synthetic, spectroscopic and biological studies

Abstract: Biocidal, antifertility and spectroscopic aspects of organotin(IV) and organolead(IV) complexes with amino acids(L) and 2,2-bipyridine(L′) are described with the support of elemental analysis, IR, 1H, 13C, 119Sn and 207Pb NMR spectroscopy. The spectral data suggest that the ligand L acts in a monodentate and ligand L′ in a bidentate manner, coordinating through the nitrogen atoms. The complexes have been characterized on the basis of molecular weight determinations and conductivity measurements. The isolated products are coloured solids, soluble in dimethylsulfoxide (DMSO), dimethylformamide (DMF) and methanol. All the complexes are monomeric in nature, as indicated by their molecular weight determinations. Conductivity measurements in dry DMF show them to be non-electrolytes. The complexes have been screened against a number of fungi and bacteria to assess their growth inhibiting potential. The results are positive. In addition to these studies, the complexes show good antimicrobial properties as compared with their starting materials. The testicular sperm density, sperm morphology, sperm motility, density of cauda epididymis, spermatozoa and fertility in mating trials and the biochemical parameters of the reproductive organs of rats were examined and are discussed in detail. Copyright © 2006 John Wiley & Sons, Ltd.