251
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Roy K. Experiences of a billionaire. Demography. INTEGRATION (TOKYO, JAPAN) 1994:40-5. [PMID: 12287785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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252
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Mandal P, Roy K, Sil NC. Erratum: Ionization in positron-atom collisions. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 49:1513. [PMID: 9910391 DOI: 10.1103/physreva.49.1513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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253
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Dow B, Follett E, Munro H, Buchanan I, Roy K, McOmish F, Yap P, Simmonds P. Failure of 2nd- and 3rd-Generation HCV ELISA and RIBA to Detect HCV Polymerase Chain Reaction- Positive Donations. Vox Sang 1994. [DOI: 10.1159/000462598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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254
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Manner M, Roy K, Hofheinz H, Post S, Senninger N, Otto G. Reperfusion injury after liver transplantation: the role of eicosanoids. Transplant Proc 1992; 24:2701-2. [PMID: 1281571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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255
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Roy K, Vijayakumar EK, Mukhopadhyay T, Chatterjee S, Bhat RG, Blumbach J, Ganguli BN. Aranorosinol A and aranorosinol B, two new metabolites from Pseudoarachniotus roseus: production, isolation, structure elucidation and biological properties. J Antibiot (Tokyo) 1992; 45:1592-8. [PMID: 1473986 DOI: 10.7164/antibiotics.45.1592] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Two new secondary metabolites, aranorosinol A (1) and aranorosinol B (2), were isolated from a strain of Pseudoarachniotus roseus. Their structures were elucidated on the basis of their spectral properties and chemical transformations and were found to be similar to aranorosin (3) isolated from the same strain.
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256
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Mitchell P, Parker G, Jamieson K, Wilhelm K, Hickie I, Brodaty H, Boyce P, Hadzi-Pavlovic D, Roy K. Are there any differences between bipolar and unipolar melancholia? J Affect Disord 1992; 25:97-105. [PMID: 1644992 DOI: 10.1016/0165-0327(92)90072-e] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Although it is now more than 30 years since Leohard originally proposed the distinction between bipolar and monopolar (unipolar) forms of affective disorder, there have been relatively few studies which have investigated clinical features which may differentiate the depressed phase of bipolar disorder from unipolar depression. In this study we examined the value of a new scale for rating depressive mental state signs (the 'core' score system), and a large series of symptoms and risk factors, in distinguishing between 27 age and sex-matched pairs of bipolar and unipolar patients diagnosed as melancholic on several diagnostic criteria. In general, we found a marked similarity between the groups on clinical features of the depressive episode when allowance was made for multiple tests. Bipolar patients, however, had shorter episodes of depression and were less likely to demonstrate 'slowed movements' than unipolar subjects. There were also consistent trends on other items for psychomotor retardation to be less common and agitation to be more likely in the bipolar patients. At the least, these findings suggest that the widely-held belief that bipolar depressed patients typically have psychomotor retardation is not as clear-cut as has been previously described.
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257
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Mukhopadhyay T, Roy K, Bhat RG, Sawant SN, Blumbach J, Ganguli BN, Fehlhaber HW, Kogler H. Deoxymulundocandin--a new echinocandin type antifungal antibiotic. J Antibiot (Tokyo) 1992; 45:618-23. [PMID: 1624363 DOI: 10.7164/antibiotics.45.618] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A new echinocandin type antifungal antibiotic, deoxymulundocandin, C48H77N7O15, was isolated from the culture filtrate and mycelia of a fungal culture, Aspergillus sydowii (Bainier and Sartory) Thom and Church var. nov. mulundensis Roy (Culture No. Y-30462). The structure was established by comparative GC-MS analyses of the derivatized acid hydrolysates of deoxymulundocandin and mulundocandin as well as by the high field NMR experiments (COSY, NOESY and DEPT).
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258
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Parker G, Roy K, Hadzi-Pavlovic D, Pedic F. Psychotic (delusional) depression: a meta-analysis of physical treatments. J Affect Disord 1992; 24:17-24. [PMID: 1347545 DOI: 10.1016/0165-0327(92)90056-c] [Citation(s) in RCA: 107] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Literature reviews have suggested that combination antidepressant/antipsychotic drug therapy and electroconvulsive therapy (ECT) are of comparable efficacy in treating psychotic depression, and distinctly superior to antidepressant alone or antipsychotic alone. We undertook a meta-analysis of 44 studies, and focussed on those three principal treatment options. There was a trend for ECT to be superior to combination drug therapy, with bilateral ECT being suggested as distinctly more effective than unilateral, and ECT was demonstrated to be significantly superior to tricyclic drug alone. Combination drug therapy ranked as more effective than antipsychotic alone and than antidepressant alone, but that greater efficacy was not significant.
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259
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Parker G, Hadzi-Pavlovic D, Mitchell P, Hickie I, Wilhelm K, Brodaty H, Boyce P, Roy K. Psychosocial risk factors distinguishing melancholic and nonmelancholic depression: a comparison of six systems. Psychiatry Res 1991; 39:211-26. [PMID: 1798821 DOI: 10.1016/0165-1781(91)90089-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We examined six systems or scales designed to distinguish melancholia from residual nonmelancholic depressive disorders in a sample of 305 patients. A count of the number of significant psychosocial risk factors showed that a clinical diagnosis was the most differentiating (19 significant risk factors), followed by the Newcastle index (13), DSM-III (10), and the CORE system (10)--the last essentially assessing psychomotor change; Research Diagnostic Criteria (RDC) (7) and an endogeneity symptom scale (2) were the least differentiating. A subsample of "composite melancholics" was derived, comprising 138 who met "melancholia" criteria for DSM-III, RDC, and CORE, and they were contrasted with residual depressives. The composite melancholics were older, had had a briefer depressive episode, and differed significantly on 12 risk factors, essentially being less likely to report deprivational experiences such as deficient parenting and dysfunctional marital relationships. We suggest that such a risk factor strategy is of potential use in refining the clinical definition of melancholia.
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260
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Manner M, Seelos R, Roy K, Runkel N, Otto G. The role of prostaglandins in reperfusion injury after liver transplantation in pigs. Transplant Proc 1991; 23:2413. [PMID: 1926410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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261
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Roy K. Occupational health, safety, and environmental compliance plan for physician offices. HEALTHCARE HAZARDOUS MATERIALS MANAGEMENT : HHMM 1991; 5:5-7. [PMID: 10115047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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262
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Mukherjee T, Roy K, Bhaduri A. Acivicin: a highly active potential chemotherapeutic agent against visceral leishmaniasis. Biochem Biophys Res Commun 1990; 170:426-32. [PMID: 2383250 DOI: 10.1016/0006-291x(90)92109-d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Acivicin, a chlorinated amino acid antibiotic, is found to be remarkably effective in killing both the vector and the host form of the parasitic protozoa, Leishmania donovani, the causative agent for visceral leishmaniasis or Kala-azar. The ED50 (50 nM) for the pathogenic amastigote form in in vitro screening system is significantly lower than the reported values for other drugs under trial. The drug irreversibly inactivates both in vitro and in vivo carbamyl phosphate synthetase II, the first enzyme of the pyrimidine biosynthetic pathway. The irreversible inactivation of this sensitive target enzyme and lack of effective reversal by glutamine makes acivicin a preferred candidate for potential chemotherapy against increasing number of Kala-azar cases that are reported to be unresponsive to pentavalent antimonials.
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263
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Bergeron MG, Roy K, Lavoie G. False resistance of Streptococcus faecalis to enoxacin by disc diffusion susceptibility tests. J Antimicrob Chemother 1989; 23:158-9. [PMID: 2501266 DOI: 10.1093/jac/23.1.158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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264
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Fehlhaber HW, Kogler H, Mukhopadhyay T, Vijayakumar EK, Roy K, Rupp RH, Ganguli BN. Aranorosin, a novel antibiotic from Pseudoarachniotus roseus. II. Structure elucidation. J Antibiot (Tokyo) 1988; 41:1785-94. [PMID: 3209473 DOI: 10.7164/antibiotics.41.1785] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Aranorosin, a new antifungal antibiotic, has been isolated from the culture filtrate and mycelium of a strain of Pseudoarachniotus roseus Kuehn. The antibiotic, C23H33NO6, contains a novel 1-oxaspiro[4,5]decane ring system. The structure (I) has been elucidated on the basis of spectroscopic and chemical analysis.
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265
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Roy K, Mukhopadhyay T, Reddy GC, Desikan KR, Rupp RH, Ganguli BN. Aranorosin, a novel antibiotic from Pseudoarachniotus roseus. I. Taxonomy, fermentation, isolation, chemical and biological properties. J Antibiot (Tokyo) 1988; 41:1780-4. [PMID: 3209472 DOI: 10.7164/antibiotics.41.1780] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A novel antibiotic, aranorosin, was isolated from the fermentation broth of a new fungal isolate identified as Pseudoarachniotus roseus. The antibiotic showed a wide spectrum of activity.
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266
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Laha U, Bhattacharyya C, Roy K, Talukdar B. Hamiltonian hierarchy and the Hulthén potential. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1988; 38:558-560. [PMID: 9954838 DOI: 10.1103/physrevc.38.558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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267
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Mukhopadhyay T, Roy K, Coutinho L, Rupp RH, Ganguli BN, Fehlhaber HW. Fumifungin, a new antifungal antibiotic from Aspergillus fumigatus Fresenius 1863. J Antibiot (Tokyo) 1987; 40:1050-2. [PMID: 3305454 DOI: 10.7164/antibiotics.40.1050] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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268
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Bose M, Roy K, Ghoshray A. 2H NMR studies of structural phase transitions in some members of the deuterated ABF6. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 35:6619-6626. [PMID: 9940908 DOI: 10.1103/physrevb.35.6619] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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269
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Roy K, Mukhopadhyay T, Reddy GC, Desikan KR, Ganguli BN. Mulundocandin, a new lipopeptide antibiotic. I. Taxonomy, fermentation, isolation and characterization. J Antibiot (Tokyo) 1987; 40:275-80. [PMID: 3570979 DOI: 10.7164/antibiotics.40.275] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Mulundocandin, a new lipopeptide antibiotic, was isolated from the culture broth of a strain of Aspergillus sydowi No. Y-30462. The antibiotic, obtained as a colorless amorphous powder having the molecular formula C48H77N7O16, is an antifungal antibiotic active against yeasts and filamentous fungi.
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270
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Majumdar R, Thakur AR, Mathur SC, Roy K, Singh R. A test of the bay-region mechanism in carcinogenesis for monomethyl benz[a]anthracenes in a self-consistent-field molecular orbital theory. Mutat Res 1986; 175:1-4. [PMID: 3748067 DOI: 10.1016/0165-7992(86)90136-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The relative carcinogenic activity of the isomeric monomethyl derivatives of benz[a]anthracene has been studied on the basis of their bay-region reactivity, and the subsequent ease of carbonium ion formation, as obtained from a suitable 'self-consistent-field' molecular orbital theory for the mobile pi-electrons. The predicted order of carcinogenic activity of these molecules is compared with the available experimental data.
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271
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Mandal P, Roy K, Sil NC. Ionization in positron-atom collisions. PHYSICAL REVIEW. A, GENERAL PHYSICS 1986; 33:756-758. [PMID: 9896676 DOI: 10.1103/physreva.33.756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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272
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Roy K, Chawla LS, Sabharwal BD, Singh K, Whig J. Alcoholic liver disease in Punjab. Indian J Gastroenterol 1985; 4:161-2. [PMID: 3848411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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273
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Johnson LM, Roy K, Shippey S. Union--yes or no? Nurs Manag (Harrow) 1983; 14:45-8. [PMID: 6552473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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274
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Sood RS, Roy K, Reddy GC, Reden J, Ganguli BN. 3-methoxy-2,5-toluquinone from Aspergillus sp. HPL Y-30,212. Fermentation, isolation, characterization and biological properties. J Antibiot (Tokyo) 1982; 35:985-7. [PMID: 7142016 DOI: 10.7164/antibiotics.35.985] [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: 01/23/2023]
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275
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Majumdar R, Mathur SC, Roy K. Mutagenicity and K-region reactivity of monomethyl derivatives of benz(a)anthracene in a self-consistent-field molecular orbital theory. Biochem Biophys Res Commun 1982; 106:836-41. [PMID: 7115378 DOI: 10.1016/0006-291x(82)91786-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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