Showing papers by "Aligarh Muslim University published in 1972"
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TL;DR: In this paper, the epidermal peels from leaves of Gymnosperms were prepared by treatment with hot, 60% HNO3, and the results showed good results.
Abstract: (1972). Preparation of epidermal peels from leaves of Gymnosperms by treatment with hot, 60% HNO3. Stain Technology: Vol. 47, No. 6, pp. 322-324.
61 citations
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TL;DR: In this paper, the analytical importance of this exchanger was demonstrated by achieving the separations of some important pairs of metal ions, such as tin(IV), iron(III) and thorium(IV).
38 citations
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TL;DR: Hooker and Foxworthy as discussed by the authors isolated six biflavones from the leaf extracts of Araucaria bidwillii Hooker and Agathis alba Foxworthy.
30 citations
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TL;DR: In this article, the (n, 2n, p and α) cross sections for the enriched isotopes of 82Se, 92Mo, 117Sn, 128Te and 130Te were measured using the activation technique.
26 citations
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TL;DR: Stannic selenites have been synthesized under a variety of conditions and a tentative structure has been proposed on the basis of chemical composition, pH titrations, infrared and thermogravimetric analyses.
26 citations
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TL;DR: Five water-insoluble compounds of chromium(III) have been synthesized by mixing 0.10M solutions of chromic chloride and the appropriate sodium salts in the volume ratio of 1:2, at pH 6-7.
24 citations
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TL;DR: 2-Mercaptobenzthiazole forms a 1:1 yellow complex with cuprous ions and appears to be a polymeric species formed through S bridges in which Cu+ attains its normal coordination number of 4.
17 citations
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16 citations
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TL;DR: Stannous ferrocyanide has been synthesized as an inorganic ion exchanger having an Sn:Fe ratio of 1:1 and a cation-exchange capacity of 2.03 mequiv/g (dry-weight).
14 citations
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TL;DR: An account of the Indian species of the genusEretmocerusHaldeman is given and three new species (E. indicus, E. mashhoodi and E. gunturiensis) are reported for the first time from India.
Abstract: An account of the Indian species of the genusEretmocerus
Haldeman is given. Three new species (E. indicus sp. n.,E. mashhoodi sp. n.,E. gunturiensis sp. n.) are described. Three species (E. haldemani
Howard,E. mundus
Mercet,E. corni
Haldeman) are reported for the first time from India. A revised key to the known species of the genus is also given.
13 citations
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TL;DR: An account of the Indian species of the genusAphelinusDalman is given and two new species (A. kashmiriensis sp. n., A. desantisi sp.n.) are described.
Abstract: An account of the Indian species of the genusAphelinus
Dalman is given Two new species (A. kashmiriensis sp. n.,A. desantisi sp.n.) are described. Four species (A. nikolskajae
Jasnosh,A. flavipes (Foerster),A. abdominalis (Dalman),A. asychis
Walker) are reported for the first time from India. A key for the separation of the Indian species ofAphelinus is presented.
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01 Jan 1972TL;DR: Zirconium phosphate is perhaps the first insoluble salt of a polybasic metal to be used as an ion exchanger as discussed by the authors, and it is the most studied and probably the most useful of all the materials of this type.
Abstract: Zirconium phosphate is perhaps the first insoluble salt of a polybasic metal to be used as an ion exchanger. It is the most studied and probably the most useful of all the materials of this type. These materials are prepared by combining oxides of group IV with the more acidic oxides of groups V and VI of the periodic table, as shown in Table 1.
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TL;DR: Membrane concentration potentials across a parchment-supported silver iodide membrane in solutions of BaCl 2, CaCl 2 and MgCl 2 of different concentrations have been measured and the effect of the external electrolyte concentration on the membrane potential, membrane permselectivity, cationic transport number in the membrane and apparent anionic mobility has been studied.
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TL;DR: In this article, the polarographic behavior of thiobenzoic acid (BSH) at the dme has been investigated in the presence of KNO 3 in the pH range 1·30 to 13·70 at 30·0 ± 0·2°C in 50 vol-% ethanol, at 0.2 M ionic strength.
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01 Jun 1972TL;DR: Chromatography of 47 cations in 11 solvent systems has been performed on stannic molybdate ion exchange papers as discussed by the authors, and some difficult separations, e.g., Rb from Cs, Al-Be-Ga, and Tl-In, have been achieved.
Abstract: Chromatography of 47 cations in 11 solvent systems has been performed on stannic molybdate ion exchange papers. Some difficult separations, e.g., Rb from Cs, Al-Be-Ga, and Tl-In, and specific separations of Ga, Au and Mg from numerous metal ions, have been achieved. R F values of some common metal ions on these papers have been compared with R F values of these cations on stannic tungstate and stannic phosphate papers. The preparation of papers is easy and the results are reproducible.
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TL;DR: In this paper, the stereochemical relationships involved in the transformation of cis- and trans-13-docosenoic acids to their corresponding dihydroxy acids through the intermediate bromoacetoxy and epoxy acids, have led to the conclusions that support Swern's reaction scheme of the unsaturated fatty acids.
Abstract: Threo- and erythro-13,14-dihydroxybehenic acids on treatment with hydrogen bromide in acetic anhydride yielded the erythro- and threo-13(14)-bromo-14(13)-acetoxybehenic acids respectively. In addition, an abnormal reaction product has been isolated and characterised as 13(14)-ketobehenic acids. The studies on the stereochemical relationships, involved in the transformation of cis- and trans-13-docosenoic acids to their corresponding dihydroxy acids through the intermediate bromoacetoxy and epoxy acids, have led to the conclusions that support Swern's reaction scheme of the unsaturated fatty acids.
Uber die Wirkung von Bromwasserstoff auf Threo- und Erythro-13,14-Dihydroxybehensauren und die Stereochemie ihrer Umlagerungen
Threo- und Erythro-13,14-Dihydroxybehensauren ergaben nach Behandlung mit Bromwasserstoff in Essigsaureanhydrid die Erythro- bzw. Threo-13(14)-brom-14(13)-acetoxybehensauren. Ein ungewohnliches Reaktionsprodukt wurde isoliert, dessen Struktur als 13(14)-Ketobehensaure angegeben wird. Die Studien uber die stereochemischen Zusammenhange bei der Umlagerung der cis- und trans-13-Docosensauren zu den entsprechenden Dihydroxysauren uber die Zwischenstufe der Bromacetoxy- und Epoxysauren unterstutzen das Reaktionsschema fur die ungesattigten Fettsauren nach Swern.
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TL;DR: Hepatic HMG-CoA hydrolase activity has been shown to increase in rats fasted for 72 hr or fed for 14 days on 5% cholesterol supplemented diet and cycloheximide treatment resulted in further activation of this enzyme in animals fed cholesterol.
Abstract: Hepatic HMG-CoA hydrolase activity has been shown to increase in rats fasted for 72 hr or fed for 14 days on 5% cholesterol supplemented diet. Cycloheximide treatment resulted in further activation of this enzyme in animals fed cholesterol. Significant activation of HMG-CoA hydrolase was also observed in rats fed normally and treated with cycloheximide and actinomycin D either individually or simultaneously.
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TL;DR: In this article, a reassessment of the evidence furnished by animal and plant fossils is made in view of recent findings, and an Aptian or Albian age is favoured as the upper age limit of the East Coast Gondwanas.
Abstract: The controversial upper age limit of the East Coast Gondwanas is discussed. A reassessment of the evidence furnished by animal and plant fossils is made in view of recent findings. Whereas the flora points towards a Jurassic age, the ammonites and other invertebrate megafossils indicate a Neocomian age. The microfossils support the concept of an Early Cretaceous age. The conflicting evidence of flora and fauna and the probable reliability of each is discussed. Although there is some doubt about the correctness of the floral testimony, the reliability of faunal evidence seems established, and an Aptian or Albian age is favoured as the upper age limit of the East Coast Gondwanas.
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TL;DR: The mass spectra of several steroidal 6-one ethylene acetals have been examined in this paper, and the fragmentation pathways suggested are supported by accurate mass measurement of the salient fragment ions and in some cases also by appropriate metastable peaks.
Abstract: The mass spectra of several steroidal 6-one ethylene acetals have been examined. The spectra of I and II are conspicuous by an intense [M — 55] peak. This differentiates them from other acetals reported in the present study. The acetals III, IV, V, VI, VII and VIII show the expected behaviour related to the acetal IX. The fragmentation pathways suggested are supported by accurate mass measurement of the salient fragment ions and in some cases also by appropriate metastable peaks.
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TL;DR: In this paper, Davydov and Rostovsky used the asymmetric rotor model to estimate the transition probability from the 2+ state of the ε-vibrational band to the ground state rotational band in the rare-earth and actinide regions of the even-even nuclei.
Abstract: The ratios of theE2 transition probabilities from the 2+ state of theγ-vibrational band to the 2+ and 0+ states of the groundstate rotational band in the rare-earth and actinide regions of the even-even nuclei are estimated using the asymmetric rotor model of Davydov and Rostovsky. The known experimentalB(E2, 2+′→2+)/B(E2, 2+′→0+) values for the above regions are compared with the theoretical estimates. It is observed that this model explains satisfactorily all the known experimental data except those of the platinum nuclei. An explanation for the disagreement in the platinum nuclei is given.
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TL;DR: In this paper, the interaction of copper(II) with salicylidene glycine schiff base has been studied polarographically and the composition of the complex in methanol and aqueous media has been established.
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01 Apr 1972TL;DR: In this paper, the relative exchange capacities of stannic phosphate papers have been studied at varying percentages of Stannic chloride (As), and a straight line is obtained when [(1 /RF)−1] is plotted against As.
Abstract: Relative exchange capacities of stannic phosphate papers have been studied at varying percentages of stannic chloride (As). A straight line is obtained when [(1 /RF)−1] is plotted against As. Chromatograms developed at different temperatures show a slight increase in RF values on increasing the temperature.
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TL;DR: Resin beads in the Fe(III) or p-dimethylaminobenzylidene-rhodanine form are used as indicators in precipitation titrations with K(3)Fe(CN)(6), and Ag(+).
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TL;DR: In this article, the immittance matrices for a five-layer uniform distributed parameter R2-C21-R1-C10-G∞ network are evaluated, taking into account the effects of parasitic capacitance existing among the constituent layers.
Abstract: Indefinite immittance matrices for a five-layer uniform distributed parameter R2-C21-R1-C10-G∞ network are evaluated, taking into account the effects of parasitic capacitance existing among the constituent layers. Immittance matrices are considered to be indispensable for a comparative study of the various network functions associated with all the subnetworks to be yielded by a multilayer distributed parameter network. As such, the presentation of the immittance matrices for this structure is intended to serve as the basis for the systematic evaluation of all network characteristics of a multiterminal device under different electrical conditions to be imposed on its external terminals.
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01 Jun 1972TL;DR: The increment haemolysis curves for the above three species were found to be of monophasic type which showed uniform population of red blood cells, and the differences between the mean corpuscular fragility (MCF) values among the species investigated were finding to be statistically significant.
Abstract: Osmotic fragilities of red blood cells of three freshwater fish species,Ophicephalus punctatus (Bloch),O. striatus (Bloch), andClarias batrachus (L.) were studied under standard conditions in hypotonic solutions of sodium chloride. The fragility curves of the fishes were found to be of normal sigmoid type similar to those of marine fishes and mammalian erythrocytes. The differences between the mean corpuscular fragility (MCF) values among the species investigated were found to be statistically significant, while the standard deviations at H50 (50% haemolysis) showed that the MCF values remained consistent with in the species.