1026
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Davids CN, Wang TF, Ahmad I, Holzmann R, Janssens RV. Electron-capture branching ratio of 81Krm. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1987; 35:1114-1118. [PMID: 9953869 DOI: 10.1103/physrevc.35.1114] [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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1027
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Bokhari SY, Ahmad A, Shaikh MY, Ahmad I. A study of tuberculosis contacts. J PAK MED ASSOC 1987; 37:48-52. [PMID: 3106664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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1028
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Ahmad I, Hellebust JA. Glutamine Synthetase Isoenzymes in the Green Soil Alga Stichococcus bacillaris Naeg. PLANT PHYSIOLOGY 1987; 83:259-61. [PMID: 16665232 PMCID: PMC1056344 DOI: 10.1104/pp.83.2.259] [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
Two forms of glutamine synthetase (GS(1) and GS(2)) have been separated from cells of Stichococcus bacillaris by fast protein liquid chromatography. The activities of the two isoenzymes were influenced by the composition of the media employed; thiol reagents were essential for stabilizing GS(2) but they suppressed GS(1) activity. The activity of each isoenzyme was, therefore, determined following separate purification procedures. Growth conditions influenced both isoenzymes; GS(2) showed maximum activity under photoautotrophic conditions, whereas GS(1) showed maximum activity under heterotrophic conditions.
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1029
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Phillips WR, Ahmad I, Emling H, Holzmann R, Janssens RV, Khoo T, Drigert MW. Octupole deformation in neutron-rich barium isotopes. PHYSICAL REVIEW LETTERS 1986; 57:3257-3260. [PMID: 10033999 DOI: 10.1103/physrevlett.57.3257] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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1030
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Paul M, Ahmad I, Kutschera W. Search for 34Si ions in 241Am decay. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1986; 34:1980-1982. [PMID: 9953665 DOI: 10.1103/physrevc.34.1980] [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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1031
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Sanders SJ, Betts RR, Ahmad I, Lesko KT, Saini S, Wilkins BD, Videbaek F, Dichter BK. Fission-like yields in 16O+40,44Ca reactions. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1986; 34:1746-1756. [PMID: 9953641 DOI: 10.1103/physrevc.34.1746] [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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1032
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Ahmad I, Hellebust JA. The Role of Glycerol and Inorganic Ions in Osmoregulatory Responses of the Euryhaline Flagellate Chlamydomonas pulsatilla Wollenweber. PLANT PHYSIOLOGY 1986; 82:406-10. [PMID: 16665042 PMCID: PMC1056131 DOI: 10.1104/pp.82.2.406] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The green euryhaline flagellate Chlamydomonas pulsatilla Wollenweber, isolated from a coastal marine environment, was grown exponentially over the salinity range of 10 to 200% artificial seawater (ASW). The cellular volume and aqueous space of the alga, measured by [(14)C] mannitol and (3)H(2)O tracer analyses of centrifuged cell pellets, ranged between 2.3 and 3.1 picoliters and between 1.5 and 2.1 picoliters, respectively. The nonaqueous space determined in those analyses (28-35%) was consistent with the cell composition of the alga. The glycerol content of the alga increased almost linearly with increasing salinity; its contribution to intracellular osmolality at 200% ASW was about 57%. The contribution of amino acids and soluble carbohydrates to the cell osmotic balance was small. Intracellular ion concentrations determined by analyzing centrifuged cell pellets of known [(14)C]mannitol space by atomic absorption spectrophotometry, and by neutron activation analyses of washed cells were similar. At 10% ASW, potassium and magnesium were the major cations, and chloride and phosphate were the major anions. The sodium and chloride content of the alga increased with increasing salinity; at 200% ASW the intracellular concentration of both sodium and chloride was about 400 millimolar. The intracellular osmolality (pi(int)) matched closely the external osmolality (pi(ext)) over the entire salinity range except at 10% ASW where pi(int) exceeded pi(ext) by 120 to 270 milliosmoles per kilogram H(2)O.
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1033
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Norman EA, Ahmad I, Zeig NJ. Delivery temperature of heated and cooled intravenous solutions. Anesth Analg 1986; 65:693-9. [PMID: 3706809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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1034
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1035
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Gardezi SA, Chaudhry AM, Sial GA, Ahmad I, Rashid M, Yusuf A, Siddique S, Gardezi JR, Shafique T. Congenital diaphragmatic hernia in the adult. J PAK MED ASSOC 1986; 36:16-20. [PMID: 3084815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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1036
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Helmer R, Reich C, Lee M, Ahmad I. Emission probabilities of γ-rays associated with the decay of 229Th and its daughters. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/0883-2889(86)90062-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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1037
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Kutschera W, Ahmad I, Armato SG, Friedman AM, Gindler JE, Henning W, Ishii T, Paul M, Rehm KE. Spontaneous 14C emission from 223Ra. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1985; 32:2036-2042. [PMID: 9953074 DOI: 10.1103/physrevc.32.2036] [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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1038
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Ahmad I, Hellebust JA. Transport and Assimilation of Nitrogen by Stichococcus bacillaris Grown in the Presence of Methionine Sulfoximine. PLANT PHYSIOLOGY 1985; 79:1125-6. [PMID: 16664542 PMCID: PMC1075039 DOI: 10.1104/pp.79.4.1125] [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
Stichococcus bacillaris Naeg., a green soil alga, can grow in the presence of methionine sulfoximine (MSX), an inhibitor of glutamine synthetase, by maintaining a high level of NADPH-glutamate dehydrogenase activity. MSX-grown cells can utilize both NH(4) (+) and NO(3) (-) as nitrogen source for growth. [(14)C]Methylammonium is not metabolized by S. bacillaris, and is transported by a carrier system that obeys Michaelis Menten kinetics, and is insensitive to MSX.
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1039
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Gardezi SA, Chaudhry AM, Sial GA, Ahmad I, Yousuf A, Rashid M, Siddique S, Gardezi SJ. Sutureless skin closure: a comparative study with conventional stitching. J PAK MED ASSOC 1985; 35:323-6. [PMID: 3935817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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1040
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Radford DC, Ahmad I, Holzmann R, Janssens RV, Khoo TL, Drigert MW, Garg U, Helppi H. Total gamma -ray spectrum in 153Ho: From the yrast line into the continuum. PHYSICAL REVIEW LETTERS 1985; 55:1727-1730. [PMID: 10031907 DOI: 10.1103/physrevlett.55.1727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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1041
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Ahmad I, Mian M, Khan MZ. Ground state binding energies of hypernuclei. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1985; 31:1590-1592. [PMID: 9952693 DOI: 10.1103/physrevc.31.1590] [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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1042
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Ahmad I, Fox GC, Zeig NJ, Bodner A. Malignant hyperthermia. THE JOURNAL OF THE MEDICAL SOCIETY OF NEW JERSEY 1985; 82:303-5. [PMID: 3857354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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1043
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Ahmad I, Hellebust JA. Nitrogen Metabolism of the Marine Microalga Chlorella autotrophica. PLANT PHYSIOLOGY 1984; 76:658-63. [PMID: 16663902 PMCID: PMC1064351 DOI: 10.1104/pp.76.3.658] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The levels of glutamine synthetase (GS) and glutamate dehydrogenase (GDH) in Chlorella autotrophica (clone 580) are strongly regulated by the nitrogen source and salt concentration of the medium. GS is present at high levels in NO(3) (-)-grown cells, and at maximum levels in nitrogen-starved cells. However, the levels of GS in these cells are somewhat decreased by increasing salinity. Cells growing on NH(4) (+) have high NADPH-GDH activity, the levels of which increase with increasing NH(4) (+) supply, while GS decreases to a very low level under these conditions. Salinity intensifies the induction of NADPH-GDH activity in NH(4) (+)-grown cells. The levels of NADH-GDH are low in this alga, but present under all growth conditions. Methionine sulfoximine (MSX) has little effect on growth and nitrogen assimilation of the alga in the presence of NH(4) (+).
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1044
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Sosis M, Ahmad I. An efficient technique for performing extradural blockade. Br J Anaesth 1984; 56:928-9. [PMID: 6743460 DOI: 10.1093/bja/56.8.928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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1045
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Ahmad I, Sen PC, Kulkarni RB, Sen MR. Effect of lowering the peripheral level of 5-hydroxytryptamine in host on the virulence of Entamoeba histolytica. Indian J Med Res 1984; 79:741-3. [PMID: 6097538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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1046
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Gardezi SA, Chaudhary AM, Sial GA, Ahmad I, Yousaf A. Fat embolism. J PAK MED ASSOC 1984; 34:122-6. [PMID: 6429382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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1047
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Ahmad I, Hellebust JA. Osmoregulation in the Extremely Euryhaline Marine Micro-Alga Chlorella autotrophica. PLANT PHYSIOLOGY 1984; 74:1010-5. [PMID: 16663495 PMCID: PMC1066810 DOI: 10.1104/pp.74.4.1010] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Chlorella autotrophica (Clone 580) grows over the external salinity range of 1 to 400% artificial sea water (ASW), can photosynthesize over the range from 1 to 600% ASW, and survives the complete evaporation of seawater. The alga grown at high salinities shows an increase in cell volume and a small decrease in cell water content. Measurements of ion content were made by neutron activation analysis on cells washed in isoosmotic sorbitol solutions which contained a few millimolar of major ions to prevent ion leakage. Cells grown at various ASW concentrations contain large quantities of sodium, potassium, and chloride ions. Measurements of cations associated with cell wall and intracellular macromolecules were made to determine intracellular concentration of free ions. The proline content of cells increases in response to increases in external salinity. Cells in 300% ASW contain 1500 to 1600 millimolar proline.
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1048
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Sosis M, Bodner A, Ahmad I. Management of cholinesterase inhibitor poisoning in obstetrics. Anesth Analg 1983; 62:1135-6. [PMID: 6650900 DOI: 10.1213/00000539-198312000-00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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1049
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Gardezi SA, Chaudhry AM, Sial GA, Ahmad I, Yousuf A. Minocycline HCL in urinary tract infection - a clinical trial. J PAK MED ASSOC 1983; 33:294-8. [PMID: 6418928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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1050
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Ahmad I, Farrar J, Whitbread R. Photosynthesis and chloroplast functioning in leaves of barley infected with brown rust. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0048-4059(83)90025-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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