301
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Bhattacharyya A, Chattopadhyay D, Ghosal A. Electron mobility of Al0.48In0.52As. PHYSICAL REVIEW. B, CONDENSED MATTER 1985; 31:2524-2525. [PMID: 9936076 DOI: 10.1103/physrevb.31.2524] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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302
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Bhattacharyya A, Bhattacharyya AK. Biochemical changes in some acrosomal enzymes of spermatozoa during maturation. EXPERIENTIA 1985; 41:62-3. [PMID: 3967740 DOI: 10.1007/bf02005875] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Goat spermatozoal hyaluronidase and acrosin show significantly increased activities during transition from caput to cauda epididymis. The activity of alkaline phosphatase decreases during spermatozoal transport through epididymis.
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303
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Nag Das SK, Bhattacharyya A, Bhattacharyya AK. Aminopeptidase in human seminal plasma. Andrologia 1984; 16:451-7. [PMID: 6437281 DOI: 10.1111/j.1439-0272.1984.tb00396.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Aminopeptidase of seminal plasma was studied in normozoospermic, oligozoospermic, obstructive and non-obstructive azoospermic men. Significantly higher activity was observed in non-obstructive azoospermic patients than that of other three groups. L-Alanine beta-naphthylamide hydrochloride was found to have highest hydrolysis rate in comparison to various other aminoacyl beta-naphthylamide hydrochlorides which were used for determining substrate specificity. 50% inhibitions of the enzyme activity by EDTA and 1,10-phenanthroline were obtained at 5.77 X 10(-3) M and 3.13 X 10(-6) M concentrations respectively. A single band for aminopeptidase in the activity - gel electrophoresis was obtained for all the categories of seminal plasma and the enzyme exhibited the characteristics of metalloprotein.
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304
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Nag Das SK, Bhattacharyya A. Enzymic activities in the seminal plasma of normospermic, oligospermic and infertile azoospermic men. ENZYME 1984; 32:157-61. [PMID: 6439556 DOI: 10.1159/000469469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Activities of seminal plasma alpha-D-glucosidase, beta-D-galactosidase, alpha-amylase, chymotrypsin-like enzyme and RNAase were studied in normo spermic, oligospermic and non-obstructive azoospermic men. No significant change in the activities of the aforesaid enzymes were found amongst the three catagories, classified according to sperm density.
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305
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Meyer TE, Przysiecki CT, Watkins JA, Bhattacharyya A, Simondsen RP, Cusanovich MA, Tollin G. Correlation between rate constant for reduction and redox potential as a basis for systematic investigation of reaction mechanisms of electron transfer proteins. Proc Natl Acad Sci U S A 1983; 80:6740-4. [PMID: 6580615 PMCID: PMC390061 DOI: 10.1073/pnas.80.22.6740] [Citation(s) in RCA: 83] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Rate constants for the reduction of approximately 40 electron transfer proteins by photoreduced flavins have been determined by laser flash photolysis techniques. The data for a series of 12 homologous cytochromes and 10 homologous high redox potential ferredoxins (HiPIPs) are in excellent agreement with semi-empirical equations relating rate constant and thermodynamic redox potential that have proven applicable to nonbiological electron transfer systems. These correlations allow the establishment of relative reactivities within structurally homologous classes of biological oxidation-reduction proteins, including cytochromes and HiPIPs, and a variety of nonhomologous heme-, iron-sulfur-, copper-, and flavin-containing proteins. A qualitative correspondence is shown to exist between such relative reactivity and the extent of solvent exposure of the redox centers in a particular structural class. The implications of these results are considered, and it is concluded that free energy relationships provide a sound basis for systematic analysis of reaction mechanisms of electron transfer proteins.
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306
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Basu A, Bhattacharyya A, Chakrabarty K, Chatterjee GC. Stabilization of chick erythrocyte membrane by lanthanum. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY 1983; 21:1-4. [PMID: 6629430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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307
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Haldar S, Tiwari R, Bhattacharyya A, Basu A, Chatterjee GC. Lysis of nitrofurantoin-resistant strain of Vibrio el tor. Folia Microbiol (Praha) 1983; 28:22-7. [PMID: 6403416 DOI: 10.1007/bf02877380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Both nitrofurantoin-sensitive and nitrofurantoin-resistant strains of Vibrio el tor were found to lyze in the presence of Tris-EDTA at alkaline pH. The rate of lysis was appreciably enhanced by lysozyme. The amounts of intracellular components, viz. proteins and carbohydrates, released from the nitrofurantoin-sensitive strain by Tris-EDTA treatment, were significantly lower than those from the nitrofurantoin-resistant strain. Differences in periplasmic proteins released from Tris-EDTA treated cells of nitrofurantoin-resistant and -sensitive strains were revealed by gel electrophoresis.
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308
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Bandyopadhyay SK, Tiwari RK, Bhattacharyya A, Chatterjee GC. Effect of dieldrin on rat liver plasma membrane enzymes. Toxicol Lett 1982; 11:131-4. [PMID: 6124057 DOI: 10.1016/0378-4274(82)90117-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Dieldrin, an organochlorine insecticide, when administered orally to male albino rats at a dose of 5 mg/kg body weight/day for 15 days inhibits the enzyme Mg2+ -ATPase and stimulates the activity of 5'-nucleotidase and NADH-dehydrogenase in liver plasma membrane. L-ascorbic acid supplementation offers some protection in relation to the inhibition of Mg2+ -ATPase.
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309
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Bhattacharyya A, Bhattacharyya A, Turner A. The Molecular orbital description of the trisulfur trinitride anion revisited. Inorganica Chim Acta 1982. [DOI: 10.1016/s0020-1693(00)90266-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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310
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Bhattacharyya A, Bhattacharyya PK. A novel method for recognition of organic molecules on biomembranes: fluorescence studies on strychnine. INDIAN JOURNAL OF BIOCHEMISTRY & BIOPHYSICS 1981; 18:425-9. [PMID: 6800932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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311
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Bhattacharyya PK, Bhattacharyya A. Fluorescent labelling of strychnine : a novel approach for recognition of strychnine binding sites on neuronal membrane. Biochem Biophys Res Commun 1981; 101:273-80. [PMID: 6793042 DOI: 10.1016/s0006-291x(81)80041-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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312
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Bhattacharyya A, Madyastha KM, Bhattacharyya PK. Studies on the bicuculline-GABA interactions on neuronal membrane with fluorescent labelled anti-bicuculline antibodies. INDIAN JOURNAL OF BIOCHEMISTRY & BIOPHYSICS 1981; 18:171-6. [PMID: 6273300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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313
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Bhattacharyya A, Madyastha KM, Bhattacharyya PK, Devanandan MS. Studies on bicuculline binding sites on neuronal membrane using fluorescent antibody technique: comparative binding of GABA and bicuculline. Biochem Biophys Res Commun 1981; 98:520-6. [PMID: 6784723 DOI: 10.1016/0006-291x(81)90871-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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314
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Bhattacharyya A, Bhattacharyya A, Oleksik J, Turner A. The electronic structure of siloxyl sulfide, OSiS. Inorganica Chim Acta 1981. [DOI: 10.1016/s0020-1693(00)84782-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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315
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Bhattacharyya A, Maandal A, Lahiri S. Conductometric studies on the dissociation constants of phosphoric acid in methanol-water mixtures. Electrochim Acta 1980. [DOI: 10.1016/0013-4686(80)87057-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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316
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Bhattacharyya A, Bhattacharyya A, Turner A. CNDO/2 localized molecular orbital studies of the trisulfur trinitride anion. Inorganica Chim Acta 1980. [DOI: 10.1016/s0020-1693(00)80077-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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317
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Bhattacharyya A, Bhattacharyya A, Turner A. CNDO/2 localized molecular orbital studies for the isoelectric cations cyclo- 1,3,4-trithiadiazole(2+) and cyclo-2,5-dithiatrizole(1+). Inorganica Chim Acta 1980. [DOI: 10.1016/s0020-1693(00)88888-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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318
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Chatterjee GC, Chatterjee S, Chatterjee K, Sahu A, Bhattacharyya A, Chakraborty D, Das PK. Studies on the protective effects of ascorbic acid in rubidium toxicity. Toxicol Appl Pharmacol 1979; 51:47-58. [PMID: 524373 DOI: 10.1016/0041-008x(79)90007-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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319
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Chakraborty D, Bhattacharyya A, Majumdar K, Chatterjee K, Chatterjee S, Sen A, Chatterjee GC. Studies on L-ascorbic acid metabolism in rats under chronic toxicity due to organophosphorus insecticides: effects of supplementation of L-ascorbic acid in high doses. J Nutr 1978; 108:973-80. [PMID: 650299 DOI: 10.1093/jn/108.6.973] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The effects of chronic administration of two organophosphorus insecticides, parathion and malathion on the growth rate, ascorbic acid metabolism and some other nutritional and physiological parameters in rats were studied. Both parathion and malathion toxicity retarded the growth rate of rats. Inhibition of brain acetylcholinesterase was taken as an index of organophosphorus insecticide toxicity. Haemoglobin concentration of blood and organ weights were not affected under the toxic conditions. Parathion and malathion administration stimulated the activity of L-gulonolactone oxidase along with a simultaneous increase in the tissue storage and urinary excretion of vitamin C. The activities of other enzymes of ascorbic acid metabolism, dehydroascorbatase, uronolactonase, and L-gulonate dehydrogenase and decarboxylase were altered under the experimental conditions. Only minor histological changes of the liver and kidney tissues were noted under parathion and malathion toxicities. Excess intake of vitamin C under the toxic conditions was found to be very effective in counteracting the growth retardation and also the alterations produced by parathion and malathion both at the enzymatic and histological levels.
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320
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Chattopadhyay AK, Bhattacharyya A, Lahiri SC. Extension of Hepler's Treatment of the Hammett Equation to Metal Complexes of a Ligand Family. Z PHYS CHEM 1976. [DOI: 10.1524/zpch.1976.102.1-4.151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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321
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Majumdar NK, Dasgupta GL, Bhattacharyya A. Primary pulmonary amoebiasis. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 1974; 22:167-71. [PMID: 4844749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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322
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Roberts GP, Bhattacharyya A, Jeanloz RW. The carbohydrate moiety of sea cucumber (Thyone briareus) gelatin. Carbohydr Res 1972; 25:475-87. [PMID: 4370437 DOI: 10.1016/s0008-6215(00)81659-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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323
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Bhattacharyya A, Bhattacharyya A, Chatterjee AB, Ham I. Modification of Drill Point for Reducing Thrust. ACTA ACUST UNITED AC 1971. [DOI: 10.1115/1.3428045] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A considerable amount of thrust force during drilling is due to the cutting action at the chisel edge of drills. This is in turn due to large values of negative rake angle along with a very small cutting velocity in the zone of chisel edge. The authors have developed a grinding technique for modifying the chisel edge into a pair of auxiliary cutting edges with positive rake angle by generating two slots at the chisel point in a manner similar to Zhirov-point drills. Analytical expressions have been developed for analyzing the geometry of modified chisel edge. Experimental investigations have indicated that during drilling of cast iron such modifications result in the reduction of thrust force by about 50 percent. However, there is an optimum orientation angle and setting angle which should be chosen during grinding of drills in order to get the maximum benefit in regards to the reduction of thrust force.
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324
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Bhattacharyya A, Hicks SE, Sturgess P. Some experiences in sociodrama in a county psychiatric hospital. Int J Soc Psychiatry 1971; 17:230-8. [PMID: 5160541 DOI: 10.1177/002076407101700308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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325
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Bhattacharyya A, Fari´a-Gonza´lez R, Ham I. Regression Analysis for Predicting Surface Finish and Its Application in the Determination of Optimum Machining Conditions. ACTA ACUST UNITED AC 1970. [DOI: 10.1115/1.3427835] [Citation(s) in RCA: 47] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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