Showing papers by "Aligarh Muslim University published in 1978"
TL;DR: A study of the characteristics of one-dimensional journal bearings showed that the load capacity increases and the coefficient of friction decreases as the parameter μ 1, which characterizes the microstructure of the base oil due to the presence of additives, increases as mentioned in this paper.
51 citations
32 citations
TL;DR: In this paper, the seed oils of Mucuna pruriens (Leguminosae) and Urena lobata (Malvaceae) were found to contain HBr-reacting acids to the extent of 1.3 and 10.8% respectively.
Abstract: Seed oils of Mucuna pruriens (Leguminosae) and Urena lobata (Malvaceae) were found to contain HBr-reacting acids to the extent of 1.3 and 10.8% respectively. Acetylation of the M. pruriens seed oil, followed by saponification and separation of the acids, gave 12,13-dihydroxyoleic acid. From this and other evidence it is concluded that 12,13-epoxyoleic (vernolic) acid is present as a constituent of the glycerides. On the other hand, the cyclopropenoid material in U. lobata oil was characterised as a mixture of malvalic (4.8%) and sterculic (6%) acids by the gas-liquid chromatography (g.l.c.) of the silver nitrate-methanol treated methyl esters. Seed oils of Vernonia anthelmintica and Sterculia foetida were used as reference standards.
26 citations
TL;DR: In this article, the kinetics of exchange reactions of Ag+, Zn2+, Cd2+, Hg2+, La3+ and Th4+ ions on iron(III) antimonate has been studied at four different temperatures: 30, 40, 50 and 60°C.
25 citations
TL;DR: In this article, eight biflavones have been isolated from the leaf extracts of Araucaria excelsa for the first time, including 7,7″-di-O -methyl agathisflavone and 7,4′,7''tri-O''methylamentoflavone.
22 citations
TL;DR: In this article, a new inorganic ion exchanger, stannic molybdoarsenate, was prepared by treating a 025 M solution of Stannic chloride with a mixture of a 0 25 m solution of SSA and SSA in the volume ratio Sn:Mo:As 2:1:1 at different pH values (0, 1, and 2).
Abstract: A new inorganic ion exchanger, stannic molybdoarsenate, has been prepared by treating a 025 M solution of stannic chloride with a mixture of a 025 M solution of sodium arsenate and sodium molybdate in the volume ratio Sn:Mo:As 2:1:1 at different pH values (0, 1, and 2) It may be used for the binary separation of Ba2+–La3+, Mg2+–La3+, Sr2+–Y3+, and Sr2+–La3+
20 citations
TL;DR: In this article, the fatty acid composition of six species belonging to different less familiar botanical families was determined by making use of chromatographic and spectroscopic techniques, out of which one species (item 2) showed iodine value above 180.
Abstract: Fatty acid composition of six species belonging to different less familiar botanical families was determined by making use of chromatographic and spectroscopic techniques. All species were found to have high iodine values, out of which one species (item 2) showed iodine value above 180. The total of “linolenic” and “linoleic” acids varied from 61.1 to 74.8%. Four species (Passiflora foetida, Chrozophora plicata, Salvia plebeia and Fimbristylis quinqueangularis) deserve agronomic evaluation as the first species resembles Safflower (especially grown in tropics) and the latter three species yield linoleicrich seed oils.
Untersuchungen uber Samenole aus Krauterpflanzen X
Die Fettsaure-Zusammensetzung von sechs Spezies, die zu verschiedenen wenig bekannten botanischen Stammen gehoren, wurde mit Hilfe chromatographischer und spektroskopischer Methoden bestimmt. Alle Spezies wiesen hohe Jodzahlen auf, von denen eine Spezies sogar eine Jodzahl uber 180 besas. Der Gesamtgehalt an Linolen- und Linolsaure schwankte zwischen 61.1 bis 74.8%. Vier Spezies (Passiflora foetida, Chrozophora plicata, Salvia plebeia und Fimbristylis quinqueangularis) sollten agronomisch bewertet werden, da die erstgenannte Spezies mit dem in den Tropen angebauten Safflor Ahnlichkeit aufweist, wahrend die ubrigen drei Spezies linolsaurereiche Ole ergeben.
18 citations
TL;DR: In this article, the characteristics of a micropolar lubricant in the squeeze film of a porous spherical bearing were analyzed and the load capacity of the bearing was shown to increase with the parameter μ gm 1 or as the parameter M decreases.
18 citations
TL;DR: Investigations were made on the length-weight relationship and condition factor of Esomu danricus (Ham) from ponds and flowing water channels, finding that circulation of water induced by currents in the channels appeared to cause mixing of water at all depths to even out differences in dissolved oxygen concentration, temperature, nutrients, besides minimizing the effect of repressive factor.
12 citations
TL;DR: In this paper, the adsorption behavior of 52 metal ions has been studied in DMSO-HCI systems using stannic arsenate layers, and a remarkable feature of this study is a dramatic decrease in adsorptive behavior of many ions when compared to the corresponding water HCI systems.
Abstract: The adsorption behavior of 52 metal ions has been studied in DMSO-HCI systems using stannic arsenate layers. A remarkable feature of this study is a dramatic decrease in adsorption of many ions when compared to the corresponding water-HCI systems. This specific DMSO effect has been explained and used for important binary and ternary separations. In DMSO-5 M HCI (1:1), Zr4 + and Mo6 + have been separated from each other and from a mixture of Th4 +, Ca2 +, Y3 +, Nb5 +, Ta5 +, In3 +, Ti4 +, and the rare earths.
11 citations
TL;DR: In this paper, the effect of the ester carbonyl adjacent to the double bond in 2b was found to suppress dehydrobromination (elimination) reaction and favors only substitution (SN2), unlike the allylically brominated derivatives of internal olefinic compounds.
Abstract: Methyltrans-2-hexadecenoate (1b) on allylic bromination with N-bromosuccinimide (NBS) (0.5 mole) yielded methyl 4-bromo-trans-2-hexadecenoate (2b) in 50% yield. Reaction with 2.0 moles of NBS afforded the allylic bromide (2b, δ 80%) as well as the dibromide (3b). Alkaline hydrolysis of the bromo ester (2b) yielded 4-hydroxy-trans-2-hexadecenoic acid (4a, δ 70%) and an unexpected product, 4-oxo-hexadecanoic acid (5a, δ 30%). A mechanism involving rearrangement is proposed to account for this unusual product. The effect of the ester carbonyl adjacent to the double bond in2b was found to suppress dehydrobromination (elimination) reaction and favors only substitution (SN2), unlike the allylically brominated derivatives of internal olefinic compounds. The CrO3-pyridine oxidation of4b yielded the corresponding unsaturated ketone (7b). The structures of individual reaction products were established by elemental analyses as well as by spectral studies.
TL;DR: The biological significance of the stylar heteromorphism in Solanum macranthum Dun is discussed in relation to adaptation and phylogeny, and the probable cause of the phenomenon speculated upon.
TL;DR: Hydroxyapatite chromatography has been used to demonstrate that alkylation of DNA at neutral pH may lead to denaturation under conditions where no significant depurination occurs and presence of salt has a preventive effect on such denaturation.
Abstract: Hydroxyapatite chromatography has been used to demonstrate that alkylation of DNA at neutral pH may lead to denaturation under conditions where no significant depurination occurs Presence of salt has a preventive effect on such denaturation
TL;DR: The breeding system of Solanum integrifolium has been studied and it has been elucidated that only long-style flowers are female-fertile and some of the flowers, irrespective of their stylar morphism, also exhibit male sterility which is uncommon inSolanum.
Abstract: The breeding system of Solanum integrifolium has been studied with the view of setting up a breeding programme. Three flower types are distinguished on the basis of style length. The results of crosses among these types have elucidated that only long-style flowers are female-fertile. The medium and short-style flowers are unable to set fruits. Some of the flowers, irrespective of their stylar morphism, also exhibit male sterility which is uncommon in Solanum. The biological significance of the stylar heteromorphism has been discussed in relation to evolutionary trends in the genus and the probable cause of this phenomenon speculated upon.
TL;DR: In this paper, the interaction of hexaaquochromium(III) with salicylic acid was studied in the pH range 2.5-4.2 and an associative interchange mechanism was suggested for the reaction.
TL;DR: In this article, a squeeze film step bearing with a micropolar fluid was analyzed and it was found that the load capacities increase as the micropolarity of the fluid increases or decreases.
TL;DR: The chromatographic behavior of 48 metal ions on plain and stannic arsenate papers has been studied in DMSO/1 mol dm−3 HNO3 in (9∶1), (7∶3), (5∶5), (3∶7), and (1∶9) ratios as discussed by the authors.
Abstract: The chromatographic behaviour of 48 metal ions on plain and stannic arsenate papers has been studied in DMSO/1 mol dm−3 HNO3 in (9∶1), (7∶3), (5∶5), (3∶7), and (1∶9) ratios and DMSO/8 mol dm−3 HNO3 in (7∶3) ratio. It has been found that for K(I), Rb(I), and Cs(T) Rf=KC1/2 where C is the nitric acid concentration. DMSO/8 mol dm−3 HNO3 (7∶3) is almost specific for In(III) and separates In(III) from Ga(III) and Al(III). Even on plain papers pure DMSO is a useful solvent which separates: Ca(II)−Mg(II), Sn(II)−Sb(III), Cd(II)−Zn(II), Mg(II)−Al(III), Be(II)−Mg(II) and TiO2+−VO2. A comparative study has been made of DMSO−HNO3 and butanol-HNO3 systems for K(II), Rb(I) and Cs(I).
TL;DR: A simple circuit is given for the simulation of a high-quality grounded capacitor that uses only two operational amplifiers and one resistance.
Abstract: A simple circuit is given for the simulation of a high-quality grounded capacitor. It uses only two operational amplifiers and one resistance. Experimental results are included.
TL;DR: The thermodynamics of the exchange of Ni 2+ ions with Ca-illite have been investigated in this article, where the exchange at pH 5.0 and an equilibrium time of 3 hours yielded isotherms, K and ΔG ° values, which were indicative of a strong preference for Ni 2 + ions on the illite surface.
TL;DR: In this paper, the authors reconstructed the shoreline, paleoslope and dispersal patterns of the Bhander Group in the Mandalgarh-Singoli area of the western part of the Great Vindhyan Basin.
TL;DR: Various enzymatic systems of glycolysis and tricarboxylic acid cycle were studied in the cell-free extracts of three digenetic trematodes and suggested the possible existence of the pentosephosphate pathway and a capacity for gluconeogenesis in all trematode.
Abstract: Various enzymatic systems of glycolysis and tricarboxylic acid cycle were studied in the cell-free extracts of three digenetic trematodes —Gastrothylax crumenifer andSrivastavaia indica from the rumen of the water buffaloBubalus bubalis L., andIsoparorchis hypselobagri from the catfishWallago attu. The significant activities of glucose-6-phosphate dehydrogenase, glucose-6-phosphatase and fructose-1,6-diphosphatase suggested the possible existence of the pentosephosphate pathway and a capacity for gluconeogenesis in all trematodes. However, marked quantitative differences in enzyme activities were found in these parasites.
TL;DR: Of the foods offered to gerbils Tatera indica, whole seeds and sweet foods were preferred, and finely divided foods were clearly disliked.
DOI•
01 Mar 1978TL;DR: It is thus possible to avoid ‘bait-shyness’ by using whole and then husked grains of suck pulses for poisoning this pest, and apparently poisoning in one form (whole grains) does not affect the preference for the other form (husked grains).
Abstract: Black rats,Rattus rattus L., poisoned with 0·02%zinc phosphide in whole lentil (Lens esculenta) or green gram (Phaseolus aureus) did not accept their whole grains again (bait-shyness). No similar aversion was, however, shown to husked grains of lentil or green gram.
TL;DR: Capillary solid-state spot-tests for the selective detection of carboxylic acids, ureas and phenols have been developed and have now been extended to some further organic compounds.
TL;DR: A simple and reproducible procedure has been developed for the dissolution of tantalum pentoxide using potassium nitrate and potassium carbonate in the ratio of 2:5:5.
TL;DR: In this article, a new inorganic ion-exchanger bismuth tungstate has been synthesized, which shows high selectivity towards Pb2+, which has been separated quantitatively from Zn2+, Mg2+, Ca2+, Mn2+, Cu2+ and Ni2+.
Abstract: A new inorganic ion-exchanger bismuth tungstate has been synthesized. Its composition, chemical stability and ion-exchange properties have been studied. The material shows high selectivity towards Pb2+, which has been separated quantitatively from Zn2+, Mg2+, Ca2+, Mn2+, Cu2+ and Ni2+. It also shows electron exchange behaviour with some strong reducing agents.
TL;DR: In this article, a theoretical study was made of the characteristics of squeeze film and externally pressurized bearings using non-Newtonian power law lubricants where the consistency of the lubricant is varied exponentially with temperature and pressure.
TL;DR: Theoretical equations derived recently by Toyoshima and Nozaki for the membrane potential and bi-ionic potential on non-equilibrium thermodynamics have been used for the evaluation of various membrane parameters as mentioned in this paper.