Showing papers by "University of Rajasthan published in 1983"
TL;DR: In this paper, 2-Mercapto-2-thiono-1,3,2-dioxaphospholanes and dioxaphophosphorinanes, have been synthesized by the reactions of phosphorus pentasulphide with some 1, 2-diols.
Abstract: 2-Mercapto-2-thiono-1,3,2-dioxaphospholanes and dioxaphosphorinanes, have been synthesized by the reactions of phosphorus pentasulphide with some 1,2-diols (viz., butane-2,3-diol and 2,3-dimethylbutane-2,3-diol) and 1,3-diols (viz., 2-methylpentane-2,4-diol, 2,2-dimethylpropane-1,3-diol and 2,2-diethylpropane-1,3-diol) in 1:2 molar ratio in dry benzene. These volatile compounds have been purified by distillation under reduced pressure. The 2-methylpentane-2,4-diol derivative, however, decomposed during attempted distillations. These new compounds have been characterized by elemental analysis, molecular weight determinations, measurement of pK a values and IR as well as NMR spectroscopic studies. The ammonium and sodium salts of some of these acids have also been characterized.
84 citations
TL;DR: In this article, it was shown that the primary alkoxides of chromium (III) undergo interchange with chelating ligands such as ethanolamine, β-diketones and carboxylic acids.
Abstract: Publisher Summary This chapter discusses the transition-metal alkoxides. Primary alkoxides of chromium (III) do not appear to undergo alcoholysis reactions, even under forcing conditions with other alcohols. This is rather unusual in view of the usually strong lability of the alkoxy groups exhibited in alkoxides of most of the metals studied; the main factor hindering such facile interchange has generally been explained on the basis of steric requirements. The general inertness of the primary alkoxides of chromium (III), a more detailed investigation of their substitution reactions has been carried out, and it has been shown that although these are inert to other simple alcohols they undergo interchange with chelating ligands such as ethanolamine, β-diketones and carboxylic acids.
78 citations
TL;DR: The Banded Gneissic Complex (BGC) of Rajasthan, considered to form the basement underlying the Precambrian (Proterozoic) Aravalli metasediments, shows an erosion surface marked by a conglomerate and an angular unconformity.
55 citations
TL;DR: In this paper, mixed halide dialkyl-dithiophosphates of antimony(III) have been synthesized for the first time by the reaction of metal chlorides with antimony tris (diisopropy-ldithIophophosphate) with bromine or iodine.
44 citations
TL;DR: The O, O -alkylene dithisphosphates of triorganotin(IV) chlorides with ammonium O, Oalklene dithiophosphates in 1/1 molar ratio in benzene were synthesized in this article.
36 citations
TL;DR: In this paper, the synthesis, characterization and geometrical features of pentacoordinated dibutyltin(IV) dithiocarbazate complexes are described.
35 citations
TL;DR: Pyridoxine deficiency was induced in a population of Channa punctatus and changes in RBC and related values were highly significant and indicated hypochromic microcytic anaemia; this was accompanied by leukopenia.
Abstract: Pyridoxine deficiency was induced in a population of Channa punctatus. The deficiency effects were increased by adding 4-deoxypyridoxine as an antagonist. Haematological and haematopoietic changes were studied. The significant changes in peripheral blood appeared after 150 days in the antagonist treated group and 180 days in the group on the deficient diet. After 240 days when morphological changes and an increased mortality also appeared, the changes in RBC and related values (haemoglobin, haematocrit, MCV, MCH & MCHC) were highly significant and indicated hypochromic microcytic anaemia; this was accompanied by leukopenia. The haematopoietic studies revealed significant increase in the earlier stages of erythrocytic development (basophilic erythroblasts and polychromatophilic eryth-roblasts) with a simultaneous decrease in the later stages (young and mature reticulocytes). A series of pathological disorders in the various developing cells were recorded in the imprints of haematopoietic tissues. The pyridoxine specificity of these changes were confirmed by remedial treatment for a month.
32 citations
TL;DR: Di-n-butyltin complex derived from salicylaldehyde-S-methyl dithiocarbazate has been found to be the most active in this series and display T/C values in the range 94-124.
32 citations
TL;DR: Callus cultures of two cultivars of Vigna aconitifolia were raised and their growth and differentiation studied, finding best differentiation of shoot buds was observed on a medium with K (23.2 μM) and IAA (5.7 μM).
Abstract: Callus cultures of two cultivars of Vigna aconitifolia (IPCMO-926, RDM-120) were raised and their growth and differentiation studied. In IPCMO-926 callus cultures, numerous shoot buds differentiated on MS medium with BA (0.4–22.2 μM) alone or in combination with IAA (5.7 μM). In RDM-120 best differentiation of shoot buds was observed on a medium with K (23.2 μM) and IAA (5.7 μM). Kinetin alone, however, induced rhizogenesis in callus cultures. In suspension cultures of IPCMO-926 embryoids differentiated on MS medium with K (0.5 μM) and 2,4-D (0.4 and 0.9 μM).
30 citations
TL;DR: In this article, the 119 Sn NMR chemical shifts of triorganotin(IV) oxinates were consistent with tetrahedral, 4 coordinate tin, and no fluxional processes could be detected in the 1 H and 13 C NMR spectra of Me 3 SnOx down to −90°C.
27 citations
TL;DR: Haematopoietic studies revealed that reticulocytes and mesomyelocytes were unable to keep pace with the changing peripheral blood picture, and other stages in development responded to the changes in the peripheral blood.
Abstract: Changes in haematological values (RBC numbers, haemoglobin content, haematocrit value, MCV, MCH, MCHC, TLC and DLC) based on weekly samples from a group of starved fish were investigated. After 8 weeks of starvation, the effects of restoration to a normal diet was evaluated. Parallel studies on haematopoietic tissues were also made. Changes in some biochemical values such as blood glucose, liver and muscle glycogen were also examined to correlate biochemical effects with those of haematological changes. Erythrocytes, thrombocytes and neutrophils were found to be most sensitive to starvation. The initial response to deprivation of food was an increase in RBCs and related values and in total leukocyte population. However, from week 5 onwards a sharp decline in these cell populations was noted. The leukocytes and thrombocytes showed a change parallel to RBC and the total leukocyte counts. However, neutrophils were observed to show a consistent increase throughout the starvation period. A blood glucose level below SOmglOOmh1 appeared critical in relation to blood cell population. Haematopoietic studies revealed that reticulocytes and mesomyelocytes were unable to keep pace with the changing peripheral blood picture. Other stages in development responded to the changes in the peripheral blood.
TL;DR: The distribution of Ceratophyllum species is limited by the presence of Hydrillas, and an experimental study shows that Hydrilla is allelopathic to the two species of Ceratisme and inhibits their growth.
TL;DR: During the autotropic period from about the 20th day of culture onward the light reaction system of these tissue cultures is quite comparable to that of carrot leaves; however, some differences in the CO2-fixation mechanism were observed.
Abstract: During the first 8–12 days of cultivation in a nutrient solution containing IAA, inositol and kinetin freshly isolated carrot root explants develop into a chlorophyllous and photosynthetically active tissue culture. Electron microscopy, low temperature pigment absorption spectra and fluorescence induction profile recording as well as the determination of the activity of some enzymes (ribulosebisphosphate carboxylase, phosphoenolpyruvate carboxylase) and CO2-fixation experiments were carried out. Based on the results, a sequence of developmental stages of the photosynthetic system will be proposed. During the autotropic period from about the 20th day of culture onward the light reaction system of these tissue cultures is quite comparable to that of carrot leaves; however, some differences in the CO2-fixation mechanism were observed.
TL;DR: In this article, attempts have been made to synthesise bimetallic alkoxides with the general formulae M[A1(OPri)4)]2 and PriOM [A1/OPri/4]2 by the reactions of the respective metal chlorides with KOPri and A1/opri/3 in stoichio-metric ratios.
Abstract: Attempts have been made to synthesise bimetallic alkoxides with the general formulae M[A1(OPri)4)]2 and PriOM [A1(OPri)4], M = Be(II), Zn(II), Cd(II) and Hg(II), by the reactions of the respective metal chlorides with KOPri and A1(OPri)3 in stoichio-metric ratios. The products PriOBe Al(OPri)4] and M[A1(Pri)4]2 (M = Be, Zn and Cd) were found to be volatile viscous liquids, soluble in benzene, carbon tetrachloride or chloroform. Hg[Al(OPri)4]2 (soluble in isopropanol only) could be isolated as a white solid which decomposed even at room temperature (∼20°C). Attempts to synthesise compounds with the general formula PriOM[A1(OPr1)4]2 (M = Zn, Cd and Hg) resulted in mixtures of benzene soluble (M = Zn and Cd) or isopropanol soluble (M = Hg) bimetallic isopropoxides with the formula M [A1 (OPri)4]2 and insoluble isopropoxides, M(OPri)2, along with KCl in stoichiometric ratios. All these products were susceptible to hydrolysis. The products exhibited monomeric character in benzene/chloroform solution. ...
TL;DR: The results indicate that the combination regimen seems to affect the fertility in two ways, i.e. by inhibiting spermatogenesis in the testis and maturation process in the epididymis without altering the androgenicity.
TL;DR: The seeds of Typha angustata germinate at room temperature (25–27°C) only in the presence of light, and percentage germination increases with an increase in both light intensity and duration.
TL;DR: Underground and aboveground biomass and their ratios at flowering time in different natural stands of Typha angustata near Jaipur, India were studied in the field and experimentally over a period of eleven months.
Abstract: Underground and aboveground biomass and their ratios at flowering time in different aged natural stands ofTypha angustata near Jaipur, India, were studied in the field and experimentally over a period of eleven months (June to April). The underground biomass was 40–50% of the aboveground biomass in both natural and experimental conditions.
TL;DR: In this article, the coordination behavior of azomethines derived from salicylaldehyde and some well known sulpha drugs, viz. sulphathiazole, sulphisoxazole, sulphaphenazole and sulphapyridine, sulphadiazine and sulphaguanidine has been systematically studied.
Abstract: The coordination behaviour of azomethines derived from salicylaldehyde and some well known sulpha drugs, viz. sulphathiazole, sulphisoxazole, sulphaphenazole, sulphapyridine, sulphadiazine and sulphaguanidine has been systematically studied. The resulting complexes have been subjected to elemental analyses, conductance measurements, molecular weight determination and electronic infrared and proton nuclear magnetic resonance spectral studies and their plausible structures have been discussed.
TL;DR: In this article, 12 new complexes of the type Sn(II) (RCOCHCOCHCOR′), Cl 2 Sn(IV) (R = R′ = C 6 H 5 or CH 3 ; R = C6 H 5 R´ = CH 3 ) are synthesized and characterized by physical properties, elemental analyses, molecular weight determination, conductance measurements and infrared and 119m Sn Mossbauer data.
TL;DR: In this article, the 1:1 and 1:2 (metal:ligand) molar reactions yield (ONS)B-O-B(OAc)2 and (ONSH2), where ONSH2 represents the ligand molecule.
Abstract: Condensation reactions of salicylaldehyde, 2-hydroxy-1-naphthaldehyde, 2-hydroxyacetophenone and 2,4-pentanedione with o-aminobenzenethiol lead to ring closure with the formation of heterocyclic compounds, i.e. benzothiazolines. These, however, remain in equilibrium with the azomethine form in the solution state. On reacting oxybis(diacetoxyborane), [(AcO)2B]2O, with these benzothiazolines in presence of anhydrous toluene, the stepwise replacement of the acetoxygroups with the azomethine moiety takes place and the equilibrium is shifted towards the formation of azomethine derivatives of boron. The 1:1 and 1:2 (metal:ligand) molar reactions yield (ONS)B-O-B(OAc)2 and (ONS)B-O-B(ONS) (where ONSH2 represents the ligand molecule) types of complexes, respectively. The 1:1 complexes undergo exchange reactions with 1, 2-dihydroxybenzene and 2-methylpentane-2, 4-diol. Possible structures are suggested on the basis of elemental analysis, molecular weight determinations, conductance measurements and electr...
01 Jan 1983
TL;DR: In this paper, a set of data from an initial set of Banded Gneiss Complex (BGC) east of the city of Udaipur is given, which includes typical grey gneiss with variably abundant granitic and mafic components.
Abstract: Data from an initial set of Banded Gneiss Complex (BGC) east of the city of Udaipur are given. In this region the BGC comprises typical grey gneiss with variably abundant granitic and mafic components. Efforts to date were concentrated on the mafic components which, based on chemical data, appear to be metavolcanic. All samples examined were recrystallized under amphibolite or upper amphibolite facies conditions. Pertinent chemical data for a small number of amphibolites analyzed so far are: SiO2: 49-53%; MgO: 5.7-7.3%; K2O: 0.24-0.50%; Ni: 106-140 ppm; Zr: 37-159 ppm. From Sm/Nd data, all amphibolites show small to moderate LREE enrichments.
01 Jan 1983
TL;DR: Investigation of production of essential oil and coumarins by tissue cultures of Ruta graveolens L. found that when cultures were well illuminated, the essential oil is produced and deposited in excretory cavities while in dark cultures, essentialOil is produced too, however, in ordinary cells.
Abstract: Biological role of monoterpene glycosides and its role in production and accumulation of allylphenols and phenyl propanoid compounds have been discussed by Skoop and Horster (1) for the first time in lamiaceae species Thymus vulgaris L. Preliminary phytochemical investigations of essential oil from undifferentiated tissue culture of Matricaria chamolia L. had shown no similarity, neither to the oil of in vitro differentiated leaves, nor to the oil of the flower of intact plant (2). Reinhard and co-workers (3) have investigated production of essential oil and coumarins by tissue cultures of Ruta graveolens L. They found that when cultures were well illuminated, the essential oil is produced and deposited in excretory cavities while in dark cultures, essential oil is produced too, however, in ordinary cells. Nagel and Reinhard (4) have reported that root tissue cultures of Ruta graveolens L. however maintained their chemical differentiation in all conditions. Whether cultivated in light or dark they produced an oil that resembles that of the roots of the whole plant. But in stem tissue cultures of Ruta graveolens L. the synthesis and composition of volatile oil depends on light intensity and its wave length and further more on the kind of oil secretion in oil cells or secretory passages.
01 Jan 1983
TL;DR: The findings on hypocotyl and callus cultures of two tree legumes, Albizia lebbek and Dalbergia sissoo, and one pulse crop legume, Vigna aconitifolius, are presented.
Abstract: The ability of cultured cells to produce fertile plants under controlled conditions is of special significance in relation to agriculture and forestry. However, differentiation in callus and cell cultures of legumes has proved difficult. Limited success has been achieved in regenerating shoot buds in callus and organ explants of a few species like Medicago sativa (1, 2), Phaseolus vulgaris (3), Dalbergia sissoo (4), Cajanus cajan (5), Arachis hypogea (6), and Lathyrus sativus (7). In the present communication, our findings on hypocotyl and callus cultures of two tree legumes, Albizia lebbek and Dalbergia sissoo, and one pulse crop legume, Vigna aconitifolius, are presented.
TL;DR: In this paper, the weighted geometric mean of resistors considered for determining the effective thermal conductivity of two-phase systems has been optimised and a set of bounds have been derived.
Abstract: The weighted geometric mean of resistors considered for determining the effective thermal conductivityK
E of two-phase systems has been optimised. Solutions of the equations lead to a useful set of bounds. When compared with other bounds the present bounds give the better results in estimating the upper and lower values of the effective thermal conductivity of a two-phase system.
01 Jan 1983
TL;DR: Investigation of steroidal sapogenin contents of Y. aloefolia L., leaves rhizomes, flowers and its eight month old callus tissue established on revised Murashige and Skoog’s (RT) medium from leaves finds nothing unusual.
Abstract: The genus Yucca is among the promising source with regard to their valuable steroidal sapogenin contents. Variety of Yucca species have been examined by wall M.E. and co-workers (1–5). Tomova and Panova (6) has examined sapogenins from leaves of Yucca aloefolia L. grown in Bulgaria. Recently Bedour and co-workers (7) have reported seasonal variation in sapogenin contents of Y. aloefolia. We have investigated steroidal sapogenin contents of Y. aloefolia L., leaves rhizomes, flowers and its eight month old callus tissue established on revised Murashige and Skoog’s (RT) medium from leaves.
TL;DR: In this paper, the triorganotin(IV) derivatives of the type R 3 Sn(R′COCHCOCH 2 COR″) and [R 3 Sn] 2 (R′ COCH COCHCOR″) have been synthesized by the interaction of R3 SnCl with mono- or disodium salt of 2, 4, 6-heptanetrione, 1-phenyl-1, 3, 5hexanetrion and 1, 5-diphenyl- 1, 3-5-pentanetrienetrione in
TL;DR: In this paper, the probable mechanism involving the role of superoxide ion in the production of cotinine alkaloid was presented, where the anode material and current density played a significant role.
TL;DR: A significant decrease in LDH and transaminases (GOT, GPT) following vasectomy indicated an altered secretory activity of the accessory sex organs.
Abstract: The sex accessory gland functions were studied in 1-12 months vasectomized langur monkeys. Seminal plasma fructose did not change. Semen volume, magnesium, and citric acid decreased transitionally up to 6 months. A significant decrease in LDH and transaminases (GOT, GPT) following vasectomy indicated an altered secretory activity of the accessory sex organs.