426
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Khan AA, Gonzalez-Lavin L. Viability assessment of allograft valves by autoradiography. THE YALE JOURNAL OF BIOLOGY AND MEDICINE 1976; 49:347-50. [PMID: 997594 PMCID: PMC2595488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Autoradiography using [(3)H]thymidine is a quantitative method to assess tissue viability. It has been found to be very useful in the organization of fresh aortic valve allograft banks. A brief description of the technique, as well as the marked difference in the active metabolism of fibro-blasts of valves placed in two storing solutions, is outlined.
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427
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Khan AA, Ahmad S, Rizvi R. An increased incidence of an androgen type cell in vaginal smears of pregnent women carrying femal foetus: possible significance. Acta Cytol 1976; 20:347-8. [PMID: 1066939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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428
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Khan AA, Khan AA, Iraqi AA. Cystic tuberculosis of patella. INDIAN JOURNAL OF MEDICAL SCIENCES 1976; 30:192-4. [PMID: 1031376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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429
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Gogi R, Nath K, Khan AA, Tyagi SP. Lymphoid pseudotumours or pseudolymphomas of the orbit. Indian J Ophthalmol 1976; 24:26-31. [PMID: 1031381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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430
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Rao VS, Braun JW, Khan AA. Promotive effects of organic solvents and kinetin on dark germination of lettuce seeds. PLANT PHYSIOLOGY 1976; 57:446-9. [PMID: 16659500 PMCID: PMC542043 DOI: 10.1104/pp.57.3.446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Significant promotion in dark germination was observed when Grand Rapids lettuce (Lactuca sativa L.) seeds were soaked in acetone or dichloromethane, vacuum-dried, and imbibed at 25 C. Permeation of kinetin via these organic solvents further enhanced the dark germination. Those seeds that were affected by acetone and acetone-kinetin treatments and germinated in the dark escaped red-far red photocontrol of germination. Although abscisic acid was not detected in the organic solvent leachates, they did contain other inhibitory substances affecting lettuce seedling growth. In the light, acetone and acetone-kinetin treatments also enhanced the rate of germination and the increased germination by acetone-kinetin treatment was correlated with increased polyribosome formation. The possible mechanisms involved in promotion of lettuce seed germination by organic solvents and kinetin are discussed.
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431
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Tao KL, Khan AA. Changes in Isoperoxidases during Cold Treatment of Dormant Pear Embryo. PLANT PHYSIOLOGY 1976; 57:1-4. [PMID: 16659412 PMCID: PMC541952 DOI: 10.1104/pp.57.1.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The number of isoperoxidases and the intensity of certain isozymes increased with increasing periods of stratification of pear (Pyrus communis cv. Bartlett) embryos. The presence of GA(3) or kinetin during stratification enhanced the activity of certain isoperoxidases, and these enhancements were blocked in the presence of ABA which by itself had an inhibitory effect. Enhancement in isoperoxidases of pear embryos during stratification was inhibited by 6-methylpurine and cycloheximide; and in the presence of either of these two inhibitors, stratification failed to release the dormancy. Pear embryos germinated for 3 days showed changes in the pattern of isoperoxidases depending on the length of stratification.
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432
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Braun JW, Khan AA. Endogenous abscisic Acid levels in germinating and nongerminating lettuce seed. PLANT PHYSIOLOGY 1975; 56:731-3. [PMID: 16659382 PMCID: PMC541912 DOI: 10.1104/pp.56.6.731] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The concentrations of abscisic acid in Grand Rapids lettuce (Lactuca sativa L.) seeds imbibed under conditions which promote or inhibit germination were determined by electron capture-gas chromatography. The concentration of abscisic acid in dry seeds was 12 to 14 nanograms per 100 milligrams. During 24-hour imbibition, the abscisic acid content diminished more rapidly during conditions which allow germination (25 C in light) than in conditions which inhibited germination (35 C in light or darkness at 25 C). A decrease in endogenous levels of abscisic acid was not always correlated with germination.
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433
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Tao KL, Khan AA. Occurrence of some enzymes in starchy endosperm and hormonal regulation of isoperoxidase in aleurone of wheat. PLANT PHYSIOLOGY 1975; 56:797-800. [PMID: 16659397 PMCID: PMC541927 DOI: 10.1104/pp.56.6.797] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Peroxidase, indoleacetic acid-oxidase, alkaline, and acid phosphatases were detected in dry starchy endosperm (minus aleurone) of wheat grain. The isoperoxidase pattern differed in different parts of the dry grain. Several new isoperoxidases were found in embryos after soaking. The intensity of isoperoxidases in aleurones was enhanced in the presence of embryo or 2 muM GA(3) after 24 hours of soaking, but decreased after 72 hours. Indoleacetic acid and kinetin had no effect on isoperoxidase of aleurone. Actinomycin D and cycloheximide had no effect on isoperoxidases of aleurones from embryonectomized or naturally occurring embryoless grains. However, these two inhibitors increased the intensity of isoperoxidases in aleurones of intact embryonated grains after soaking.
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434
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Khan AA, Kolattukudy PE. Solubilization of fatty acid synthetase, acyl-CoA reductase, and fatty acyl-CoA alcohol transacylase from the microsomes of Euglena gracilis. Arch Biochem Biophys 1975; 170:400-8. [PMID: 811169 DOI: 10.1016/0003-9861(75)90135-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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435
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Rao VS, Sankhla N, Khan AA. Additive and synergistic effects of kinetin and ethrel on germination, thermodormany, and polyribosome formation in lettuce seeds. PLANT PHYSIOLOGY 1975; 56:263-6. [PMID: 16659284 PMCID: PMC541801 DOI: 10.1104/pp.56.2.263] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The inhibition of germination of Grand Rapids lettuce (Lactuca sativa L.) seeds at 35 C was removed to a marked extent by kinetin and 2-chloroethylphosphonic acid (ethrel). When both compounds were used together, an additive effect was observed. A synergistic effect was, however, noted when ethrel promoted the kinetin reversal of abscisic acid inhibition of seed germination (light- as well as gibberellic acid-, induced). Both kinetin and ethrel increased the total ribosomal material and the percentage of polyribosomes in lettuce seeds imbibed in the light for 24 hours. A combination of the two compounds showed a synergism in polyribosome formation only at high ethrel concentration. The inability of ethrel to reverse abscisic acid inhibition indicates that kinetin action cannot always be substituted by ethrel. The possible mechanisms involved in the enhanced response by a combination of kinetin and ethrel are discussed.
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436
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Khan AA, Bhargava RK, Misra NP. Platelet adhesiveness and serum magnesium ischaemic heart disease. Indian Heart J 1975; 27:186-90. [PMID: 1193649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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437
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Khan AA. Induction of labour in multiparae--oral prostaglandin or intravenous syntocinon. J PAK MED ASSOC 1975; 25:53-6. [PMID: 814291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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438
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Rao VS, Khan AA. Enhancement of polyribosome formation by gibberellic acid and 3',5'-adenosine monophosphate in barley embryos. Biochem Biophys Res Commun 1975; 62:25-30. [PMID: 163079 DOI: 10.1016/s0006-291x(75)80400-1] [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: 12/13/2022]
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439
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Khan AA, Kolattukudy PE. Decarboxylation of long chain fatty acids to alkanes by cell free preparations of pea leaves (Pisum sativum). Biochem Biophys Res Commun 1974; 61:1379-86. [PMID: 4218104 DOI: 10.1016/s0006-291x(74)80436-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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440
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Ansari MN, Asharaf SN, Khan AA, Raza SM. Blue rubber bleb naevus syndrome. JOURNAL OF THE INDIAN MEDICAL ASSOCIATION 1974; 63:368-9. [PMID: 4549218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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441
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Tao KL, Khan AA. Penetration of dry seeds with chemicals applied in acetone. PLANT PHYSIOLOGY 1974; 54:956-8. [PMID: 16659008 PMCID: PMC366641 DOI: 10.1104/pp.54.6.956] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Acetone is able to carry chemicals through the seed coats to reach the embryo. The amount of chemical penetrating into the seeds depends on the seed type, permeation time, and the concentration of solution. The chemicals reaching the embryo are biologically effective.
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442
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Tao KL, McDonald MB, Khan AA. Synergistic and additive effects of kinetin and ethrel on the release of seed dormancy. Life Sci 1974; 15:1925-33. [PMID: 4620997 DOI: 10.1016/0024-3205(74)90043-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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443
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Ashraf SM, Khan AA, Ansari MN, Ansari MZ. Peutz-Jeghers syndrome. JOURNAL OF THE INDIAN MEDICAL ASSOCIATION 1974; 63:335-6. [PMID: 4452792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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444
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445
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Maibach HI, Akers WA, Johnson HL, Khan AA, Skinner WA. Insects. Topical insect repellents. Clin Pharmacol Ther 1974; 16:970-3. [PMID: 4418745 DOI: 10.1002/cpt1974165part2970] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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446
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Khan AA, Mathew B. Parosteal lipoma. JOURNAL OF THE INDIAN MEDICAL ASSOCIATION 1974; 63:285-6. [PMID: 4448935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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447
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Tao KL, Khan AA. Increases in activities of aminoacyl-tRNA synthetases during cold-treatment of dormant pear embryo. Biochem Biophys Res Commun 1974; 59:764-70. [PMID: 4368813 DOI: 10.1016/s0006-291x(74)80045-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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448
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Van Onckelen HA, Verbeek R, Khan AA. Relationship of ribonucleic Acid metabolism in embryo and aleurone to alpha-amylase synthesis in barley. PLANT PHYSIOLOGY 1974; 53:562-8. [PMID: 16658743 PMCID: PMC541397 DOI: 10.1104/pp.53.4.562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
RNA metabolism of embryo and aleurone of barley grains (Hordeum vulgare L. cv. Himalaya) was studied to elucidate the role of these tissues in the control of alpha-amylase synthesis and germination. The extent of (3)H-uridine incorporated into various RNA classes of the embryo during the first 12 hours of germination was low but constant. Subsequently, there was a rapid increase in RNA synthesis of all fractions. In the aleurones, after 16 hours, a gradual decrease in (3)H-uridine incorporation was observed, and by the time the synthesis of RNA in the aleurones had stopped, alpha-amylase level was at its highest in the grain.On transfer to accelerated aging conditions (43 C; 85% relative humidity), the grains lost their viability within 4 weeks. That this was due to a rapid deterioration of the embryo and not of the aleurone was apparent in studies on alpha-amylase formation, RNA metabolism, and ATP content in grains in various physiological states reported here. Results presented here also reveal a marked influence of the embryo and GA(3) on the quality of the newly synthesized RNAs. Aleurones which lacked the impulse of embryo or GA(3) were capable of synthesizing RNA but these RNAs were less heterodisperse than RNAs from aleurones which were under the influence of an embryo or GA(3).
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449
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Maibach HI, Khan AA, Akers W. Use of insect repellents for maximum efficacy. ARCHIVES OF DERMATOLOGY 1974; 109:32-5. [PMID: 4588202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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450
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Khan AA, Kohli IS. A note on the sexual behaviour of male camel (Camelus dromedarius). THE INDIAN JOURNAL OF ANIMAL SCIENCES 1973; 43:1092-4. [PMID: 4806534] [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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