3551
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Wishnow RM, Lifrak E, Chen C. Interaction of cholera enterotoxin with cultured adrenal tumor cells. Infect Immun 1975; 12:768-71. [PMID: 172445 PMCID: PMC415354 DOI: 10.1128/iai.12.4.768-771.1975] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In the adrenal tumor cell system ganglioside Gm1 inhibited cholera enterotoxin (CT)-induced steroidogenesis if it was preincubated with the toxin or added to adrenal cells 10 min before CT. In the preincubation studies a molar ratio of Gm1 to toxin of 3:1 was necessary for half-maximal inhibition of steroidogenesis. On the other hand, horse serum anticholeragenoid neutralized the steroidogenic response to cell-bound CT by 50% if it was added to adrenal monolayer cultures 15 min after the toxin. Specific antiserum was able to neutralized 20% of the toxin-induced activity even if it was added to adrenal cultures 2 h after CT. Phase contrast microscopy demonstrated that partial neutralization of the biochemical effect of CT by horse serum anticholeragenoid was accompanied by partial prevention of toxin-induced rounding of adrenal cells. Further studies showed that pretreatment of cultured adrenal cells with a maximal dose of CT increased cyclic adenosine 3'-5'-monophosphate formation in response to a maximal stimulating dose of adrenocorticotropin. This result suggested potentiation of hormonal activation of adenylate cyclase in intact adrenal tumor cells in response to CT.
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3552
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Ozawa H, Uematsu T, Chen C. [Pharmacological studies of aminoguanidines. I. Hypotensive and some general pharmacological actions of benzyl- and benzylidene-hydrazino-3,4,5,6-tetrahydropyrimidines (author's transl)]. YAKUGAKU ZASSHI 1975; 95:966-74. [PMID: 1237612 DOI: 10.1248/yakushi1947.95.8_966] [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: 12/26/2022]
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3553
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Chen C, Smith OC, McChesney J. Biosynthesis and cytokinin activity of 8-hydroxy and 2,8-dihydroxy derivatives of zeatin and N-6(increment-2-isopentenyl)adenine. Biochemistry 1975; 14:3088-93. [PMID: 1148191 DOI: 10.1021/bi00685a008] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
8-Hydroxy and 2,8-dihydroxy derivatives of the cytokinins, 6-(4-hydroxy-3-methyl-trans-2-butenylamino)purine and N-6-(increment -2-isopentenyl)adenine, have been biosynthesized by xanthine oxidase oxidation. 8-Hydroxy derivatives have been shown to be the major intermdeiates. These compounds were tested for cytokinin activity in the tobacco bioassay. The results suggest that substitution of the 8 position with a hydroxyl group causes less decrease of cytokinin activity than substitution of both the 2 and 8 positions with hydroxyl groups.
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3554
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Chen C, Fuller JL. Neonatal thyroxine administration, behavioral maturation, and brain growth in mice of different brain weight. Dev Psychobiol 1975; 8:355-61. [PMID: 1225702 DOI: 10.1002/dev.420080409] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
L-thyroxine in amounts of .5, 1, and 2 mug was injected daily from age 5 through 14 days in 3 lines of mice selected for high (H), medium (M), or low (L) brain weight. Controls (injected with vehicle only) of these lines differed in ages of eye-opening, first auditory startle, and perfection of a surface-righting response. Thyroxine at .5 mug/day accelerated the maturation of eye-opening, auditory startle, and aerial-righting response, but had no effect on a grasping response or open-field activity. Brain weights were depressed significantly in all thyroxine treated groups except in the 9k-mug dosage in H mice.
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3555
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Cheng MC, Khew KS, Chen C, Ratnam SS, Seng KM, Tan WK. Culdoscopic ligation as an outpatient procedure. Am J Obstet Gynecol 1975; 122:109-12. [PMID: 1130441 DOI: 10.1016/0002-9378(75)90623-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The increasing demand for abortion and sexual sterilization has caused the need to perform such operations on an outpatient basis. The University Department of Obstetrics and Gynaecology, Singapore, started a prospective study of culdoscopic ligation as an outpatient procedure in November, 1972. To date, over 600 operations have been performed. Analysis of the first 405 cases showed a low complication rate of 2.4 per cent. This study showed that culdoscopic ligation performed in the hospital outpatient is safe and feasible.
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3556
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Lee C, Oyasu R, Chen C. In vitro interaction of estrogen and prolactin on hormone-dependent rat mammory tumors (38511). Exp Biol Med (Maywood) 1975; 148:224-6. [PMID: 165526 DOI: 10.3181/00379727-148-38511] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Hormone-dependent, regressing mammary tumors in rats were incubated in a chemically defined culture medium containing tritium labeled leucine at 37 degrees for 2 hr. The rate of tritium incorporation into the protein fraction by these tissues was measured with and without the addition of 17beta-estradiol and/or ovine prolactin into the medium. Tumor tissue responded to either estrogen or porlactin by a 6-7% increase in the rate of 3-H-leucine incorporation. When the incubation medium contained both the hormones, the increase in the rate of 3-H leucine incorporation was 19% which was significantly greater than the sum of the effect of each single hormone measured independelntly. These results demonstrate a synergistic effect between estrogen and prolactin on rat mammary tumors.
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3557
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Chen C, Shaw YS. Cyclic metabolic pathway of a butylated hydroxytoluene by rat liver microsomal fractions. Biochem J 1974; 144:497-501. [PMID: 4468819 PMCID: PMC1168527 DOI: 10.1042/bj1440497] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A cyclic metabolic pathway was obtained when 3,5-di-t-butyl-4-hydroxytoluene (BHT) was incubated with a rat liver microsomal preparation. The pathway is as follows: BHT --> 4-hydroperoxy-4-methyl-2,6-di-t-butylcyclohexa-2,5-dienone (BHT-OOH) --> 4-hydroxy-4-methyl-2,6-di-t-butylcyclohexa-2,5-dienone (BHT-3(0)OH) --> BHT. This metabolic pathway suggests that antioxidants such as BHT owe their high efficacy, at least in part, to their metabolic regeneration.
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3558
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Chen C, Simons MJ. Counterimmunoelectrophoresis - a rapid method for the detection of antibodies to seminal plasma. IRCS JOURNAL OF INTERNATIONAL RESEARCH COMMUNICATIONS 1974; 2:1647. [PMID: 4448275] [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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3559
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Jones RH, Chen C, Iwahashi H, Sealy WC, Seaber AV. Pulmonary function in dogs after left lung reimplantation. Surgery 1973; 74:593-600. [PMID: 4729224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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3560
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Crisp AH, MacKinnon PC, Chen C, Corker CS. Observations of gonadotrophic and ovarian hormone activity during recovery from anorexia nervosa. Postgrad Med J 1973; 49:584-90. [PMID: 4788838 PMCID: PMC2495602 DOI: 10.1136/pgmj.49.574.584] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Serum gonadotrophins and gonadal steroids were measured in six unmarried female patients with anorexia nervosa before and during treatment by feeding and psychotherapy, which led to restoration of weight to matched population mean levels. In three patients whose premorbid weight was normal, hormonal levels during treatment were initially low, but as weight was regained gonadotrophic levels increased and one patient showed cyclical activity. In three other patients who were premorbidly obese gonodotrophic levels did not appear to increase over the period of investigation. With the exception of one patient whose menstrual cycles were resumed during the period of investigation, gonadal steroid levels in general appeared to remain low although, subsequently, regular monthly menstrual bleeding occurred in some of these patients.
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3561
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Kelly D, Richardson A, Mitchell-Heggs N, Greenup J, Chen C, Hafner RJ. Stereotactic limbic leucotomy: a preliminary report on forty patients. Br J Psychiatry 1973; 123:141-8. [PMID: 4582235 DOI: 10.1192/bjp.123.2.141] [Citation(s) in RCA: 72] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The neurophysiological aspects and operative technique of stereotactic limbic leucotomy have been described in a previous paper (Kelly, Richardson and Mitchell-Heggs, 1973). The present investigation is a prospective study designed to assess the results of such surgery in a group of 40 severely ill psychiatric patients, who had failed to respond satisfactorily to every other type of treatment. The results have been assessed clinically, psychologically and physiologically, in a very detailed way, at six weeks; a similar follow-up at one year is in progress. A comparison is made between the results of the present series and those of a previous: study (Kelly et al., 1972), in which more extensive leucotomy operations were carried out, and similar means of assessment were employed.
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3562
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3563
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Lewis D, Chen C, Woods G, Culpin L. A modified p-anisidine technique for the detection and permanent recording of free and combined fructose on paper chromatograms. J Chromatogr A 1972. [DOI: 10.1016/s0021-9673(01)86172-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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3564
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Chen C, Hirsch JG. The effects of mercaptoethanol and of peritoneal macrophages on the antibody-forming capacity of nonadherent mouse spleen cells in vitro. J Exp Med 1972; 136:604-17. [PMID: 4559193 PMCID: PMC2139267 DOI: 10.1084/jem.136.3.604] [Citation(s) in RCA: 235] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Nonadherent mouse spleen cells exhibited poor viability and little or no capacity to form antibodies to sheep red cells in the Mishell-Dutton culture system. Viability and antibody-forming capacity could be restored by addition to these cultures of low concentrations of mercaptoethanol (10(-4)-10(-5)M), or by addition of appropriate numbers of mouse peritoneal macrophages. Macrophage concentrations lower than optimal resulted in lower lymphoid cell viability and correspondingly fewer plaque-forming cells, whereas excess macrophages resulted in marked inhibition of antibody formation despite good viability of the lymphocytes. Restoration of the nonadherent cells with mercaptoethanol was thus much simpler and more reproducible than it was with macrophages; furthermore, the number of plaque-forming cells developed in cultures restored with mercaptoethanol was approximately fourfold higher than it was in cultures restored with optimal numbers of macrophages. In the presence of mercaptoethanol, the plaque-forming capacity of the nonadherent spleen cells was not increased when small numbers of macrophages were added to the system, nor was it decreased when the few macrophages present in the nonadherent cells were further reduced or eliminated. Excess macrophages inhibited antibody formation in the cultures containing mercaptoethanol as they did in control cultures. Optimal restoration of plaque-forming capacity to the nonadherent spleen cells with mercaptoethanol required the reducing agent to be present throughout the 4 or 5 day culture period. Addition of mercaptoethanol 1 or more days after initiation of culture, or transfer of the cells to a medium free of mercaptoethanol before completion of the culture resulted in a reduction in the numbers of plaque-forming cells. The results suggest that mouse lymphoid cells do not require macrophages in order to form antibodies to sheep red cells in vitro, provided mercaptoethanol is present in the culture medium. The mechanism of action of mercaptoethanol under these conditions is not completely clear, but one of its effects is to promote the viability of lymphoid cells in the cultures.
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3565
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Shaw YS, Chen C. Ring hydroxylation of di-t-butylhydroxytoluene by rat liver microsomal preparations. Biochem J 1972; 128:1285-91. [PMID: 4404965 PMCID: PMC1174016 DOI: 10.1042/bj1281285] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
3,5-Di-t-butylhydroxytoluene (compound I) was converted into 4-hydroperoxy-4-methyl-2,6-di-t-butylcyclohexa-2,5-dienone (compound II), 4-hydroxy-4-methyl-2,6-di-t-butylcyclohexa-2,5-dienone (compound III) and 2,6-di-t-butyl-4-hydroxymethylphenol (compound IV) by rat liver microsomal preparations in the presence of NADPH and air. The oxidation of compound (I) by m-chloroperbenzoic acid also produced the same compounds. These results suggest that hydroperoxide can be an intermediate in aromatic hydroxylation and that biological oxygenations resemble per-acid reactions.
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3566
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Chen C, Hirsch JG. Restoration of antibody-forming capacity in cultures of nonadherent spleen cells by mercaptoethanol. Science 1972; 176:60-1. [PMID: 4551488 DOI: 10.1126/science.176.4030.60] [Citation(s) in RCA: 45] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Populations of mouse spleen cells, without those cells that adhere to glass or plastic, exhibit little or no capacity for formation of antibody to sheep erythrocytes in the Mishell-Dutton culture system. When 5 x 10(-5)M mercaptoethanol is added to the culture medium, the antibody-forming capacity of these nonadherent spleen cells is restored to that of unfractionated spleen cells.
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3567
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Chen C, Tai F. Purification and characteristics of pyocin B39 II. Physical and chemical properties. Antimicrob Agents Chemother 1972; 1:159-63. [PMID: 4218942 PMCID: PMC444185 DOI: 10.1128/aac.1.2.159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
A purified preparation of pyocin B39 was shown to be homogeneous by disc electrophoresis and ultracentrifugation. Pyocin B39 is an antibacterial agent, protein in nature, and is capable of inhibiting the growth of susceptible cells. It caused a susceptible strain of Pseudomonas aeruginosa to release ultraviolet-absorbing material. Pyocin B39 appears to be a protein with a high molecular weight; its sedimentation coefficient is 32.8S. It was destroyed by 7 m urea but was resistant to attack by proteolytic enzymes, such as pepsin and trypsin. From its sedimentation coefficient, a molecular weight of about 2 x 10(6) was calculated. An electron photomicrograph of pyocin B39 revealed it as a rodlike particle, 7.50 pm long and 1.08 pm wide, with striations running at nearly right angles to the axes of the particle.
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3568
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Andrade JD, Van Wagenen R, Chen C, Ghavamian M, Volder J, Kirkham R, Kolff WJ. Coated adsorbents for direct blood perfusion II. TRANSACTIONS - AMERICAN SOCIETY FOR ARTIFICIAL INTERNAL ORGANS 1972; 18:473-83, 485. [PMID: 4215191 DOI: 10.1097/00002480-197201000-00115] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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3569
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Lai CY, Chen C, Smith JD, Horecker BL. The number, distribution and functional implication of sulfhydryl groups in rabbit muscle aldolase. Biochem Biophys Res Commun 1971; 45:1497-505. [PMID: 5166849 DOI: 10.1016/0006-291x(71)90189-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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3570
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Lee SG, Chen C. Liver microsomes demethylation of mestranol (3-methoxy-17-ethynyl-1,3,5(10)-estratrien-17 -ol) and some of its effects on drug metabolism. Steroids 1971; 18:565-75. [PMID: 4402245 DOI: 10.1016/0039-128x(71)90069-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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3571
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Chen C. Supervision of the high risk foetus in labour. BERITA JURURAWAT 1971; 11:33-4. [PMID: 5210384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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3572
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Lai CY, Chen C. Codfish muscle aldolase: purification, properties, and primary structure around the substrate-binding site. Arch Biochem Biophys 1971; 144:467-75. [PMID: 5569894 DOI: 10.1016/0003-9861(71)90350-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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3573
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Chen C, Compans RW, Choppin PW. Parainfluenza virus surface projections: glycoproteins with haemagglutinin and neuraminidase activities. J Gen Virol 1971; 11:53-8. [PMID: 4325089 DOI: 10.1099/0022-1317-11-1-53] [Citation(s) in RCA: 70] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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3574
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Lue H, Chen C, Wei H. Congestive heart failure due to left-to-right shunts. Clinical features and hemodynamic studies. JAPANESE HEART JOURNAL 1971; 12:138-52. [PMID: 5313689 DOI: 10.1536/ihj.12.138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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3575
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Gill W, Chen C. Dehydroepiandrosterone sulfatase in the prostate and seminal vesicles of the rat. BIOCHIMICA ET BIOPHYSICA ACTA 1970; 218:148-54. [PMID: 4248675 DOI: 10.1016/0005-2760(70)90102-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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3576
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Lemire GG, Heimbecker RO, Chen C, Drucker WR. [Caisson disease: new etiology]. L'UNION MEDICALE DU CANADA 1970; 99:1809-12. [PMID: 5508292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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3577
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Lai CY, Chen C, Horecker BL. Primary structure of two COOH-terminal hexapeptides from rabbit muscle aldolase: a difference in the structure of the alpha and beta subunits. Biochem Biophys Res Commun 1970; 40:461-8. [PMID: 5474795 DOI: 10.1016/0006-291x(70)91031-4] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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3578
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Chen C, Sealy WC, Seaber AV. The dynamic nature of collateral ventilation. J Thorac Cardiovasc Surg 1970; 59:518-29. [PMID: 5439361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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3579
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Paquet E, Chen C, Lutman G. Benign, cystic posterior mediastinal teratoma. JOURNAL OF THE CANADIAN ASSOCIATION OF RADIOLOGISTS 1970; 21:19-20. [PMID: 5459927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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3580
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Nakao K, Oka M, Chen C, Bajusz E, Angrist A. Studies of the spontaneous myocardiopathy in the BIO-14.6 strain of hamster. PATHOLOGIA ET MICROBIOLOGIA 1970; 35:118-24. [PMID: 4319521 DOI: 10.1159/000162210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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3581
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Lin CC, Chen C. The effects of carbon tetrachloride and some antioxidants on the hydroxylation of tetralin by rat liver homogenate. BIOCHIMICA ET BIOPHYSICA ACTA 1969; 192:133-5. [PMID: 4390646 DOI: 10.1016/0304-4165(69)90018-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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3582
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Chen C, Lin CC. [9-14C]Fluorene hydroperoxide as a possible intermediate in the hydroxylation of [9-14C]fluorene by rat liver homogenate. BIOCHIMICA ET BIOPHYSICA ACTA 1969; 184:634-40. [PMID: 5821026 DOI: 10.1016/0304-4165(69)90278-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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3583
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Chen C, Awapara J. Intracellular distribution of enzymes catalyzing succinate production from glucose in Rangia mantle. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY 1969; 30:727-37. [PMID: 4311403 DOI: 10.1016/0010-406x(69)92151-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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3584
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Chen C, Osuch MV. Biosynthesis of bufadienolides--3-beta-hydroxycholanates as precursors in Bufo marinus bufadienolides synthesis. Biochem Pharmacol 1969; 18:1797-802. [PMID: 5811615 DOI: 10.1016/0006-2952(69)90273-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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3585
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Osuch MV, Chen C. Fate of exogenous marinobufagin-3H in Bufo marinus. Biochem Pharmacol 1969; 18:1803-8. [PMID: 5811616 DOI: 10.1016/0006-2952(69)90274-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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3586
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Triantaphyllopoulos DC, Chen C, Triantaphyllopoulos E. Nature of the inhibition of prothrombin consumption by lysed fibrinogen. Br J Haematol 1969; 16:589-98. [PMID: 5816703 DOI: 10.1111/j.1365-2141.1969.tb00439.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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3587
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Chen C, Lin CC. Mechanism of aliphatic hydroxylation. Tetralin hydroperoxide as an intermediate in the hydroxylation of tetralin in rat-liver homogenate. BIOCHIMICA ET BIOPHYSICA ACTA 1968; 170:366-74. [PMID: 4387713 DOI: 10.1016/0304-4165(68)90016-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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3588
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Chai T, Chen C, Rosen A, Levin RE. Detection and incidence of specific species of spoilage bacteria on fish. II. Relative incidence of Pseudomonas putrefaciens and fluorescent pseudomonads on haddock fillets. Appl Microbiol 1968; 16:1738-41. [PMID: 4881956 PMCID: PMC547750 DOI: 10.1128/am.16.11.1738-1741.1968] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Pseudomonas putrefaciens has been found to constitute one of the major species of spoilage bacteria on haddock fillets. The initial population of this organism on fillets of high bacterial quality is uniformly below 4% and most frequently no greater than 1%. During refrigerated storage, the organism increases at a more rapid rate than the total psychrophilic population, comprising 50 to 90% of the total population when the total count exceeds 10(6)/g of tissue. Fluorescent pseudomonads were shown to constitute a second group of predominant pseudomonads constituting up to 19.3% of the total population after 8 days of refrigerated storage. Of a total of 45 fluorescent pseudomonads isolated from haddock fillets, 14 (31.1%) were found to be potent fish spoilers. The use of a soft-agar-gelatin plating technique showed a parallel increase of proteolytic organisms with total count indicating that proteolytic organisms other than P. putrefaciens and fluorescent pseudomonads increase at a slower rate than these two groups.
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3589
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Lai CY, Chen C. Studies on the structure of rabbit muscle aldolase. II. Primary structure of peptide CnV and chemical evidence for the four-subunit structure of aldolase. Arch Biochem Biophys 1968; 128:212-8. [PMID: 5677181 DOI: 10.1016/0003-9861(68)90024-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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3590
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Heimbecker RO, Lemire G, Chen C. Surgery for massive myocardial infarction. An experimental study of emergency infarctectomy with a preliminary report on the clinical application. Circulation 1968; 37:II3-11. [PMID: 5646587 DOI: 10.1161/01.cir.37.4s2.ii-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Emergency myocardial infarctectomy has been studied experimentally and clinically. The clinical experience describes encouraging results in two of four consecutive patients. The criteria of patient selection are described, along with a suggestion that associated perforation of the ventricular septum, as documented in three of the patients, makes the operative procedure more difficult and the results less satisfactory.
Experimental myocardial infarction was studied in two groups of calves with a mortality rate of 100%. In the first group emergency resuscitation by massage and bypass produced an initial resuscitation rate of 14% but a survival rate of only 11%. In the second control group of fatal infarction, resuscitation was attempted by 45 minutes of bypass, with improvement in the resuscitation rate to only 23% and proportionate improvement in the survival rate to 18%.
Emergency infarctectomy dramatically increased the initial salvage rate to 100% and improved the survival rate to 41%.
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3591
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Fox JE, Chen C. Characterization of labeled ribonucleic acid from tissue grown on 14C-containing cytokinins. J Biol Chem 1967; 242:4490-4. [PMID: 6070845] [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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3592
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Lai CY, Chen C, Tsolas O. Isolation and sequence analysis of a peptide from the active site of transaldolase. Arch Biochem Biophys 1967; 121:790-7. [PMID: 6078104 DOI: 10.1016/0003-9861(67)90068-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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3593
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Heimbecker RO, Chen C, Hamilton N, Murray DW. Surgery for massive myocardial infarction. An experimental study of emergency infarctectomy. Surgery 1967; 61:51-8. [PMID: 6016666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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3594
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Pan Y, Tu Y, Hawan W, Chen C, Go L. [Synthesis of total bovine insulin crystals]. TANPAKUSHITSU KAKUSAN KOSO. PROTEIN, NUCLEIC ACID, ENZYME 1966; 11:603-605. [PMID: 6007350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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3595
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Liang D, Chen C, Wang X, Yeh H. [The effect of sodium nitrite on the oxygen consumption of rat heart muscle]. SHENG LI XUE BAO : [ACTA PHYSIOLOGICA SINICA] 1966; 29:78-80. [PMID: 5178718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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3596
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Hsu C, Yeh E, Chen C, Wang C, Lin T. [An epidemiological study of 6 year-old children not attending school. I. Preliminary findings from Taipei City]. ZHONGHUA MINGUO XIAO ER KE YI XUE HUI ZA ZHI [JOURNAL]. ZHONGHUA MINGUO XIAO ER KE YI XUE HUI 1966; 7:23-30. [PMID: 5945132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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3597
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Chen C, Le Fevre RJW. The molecular conformation of Tetramethylcyclobutane-1,3-dione. Aust J Chem 1965. [DOI: 10.1071/ch9651293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3598
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Abstract
Twenty pteropod species and two subspecies are present in the Bermuda Pedestal pelagic sediments. Some species having thin, fragile shells were absent from the sediments but present in the deep water off Bermuda. The subarctic species was present only in the sediments, which indicates that the subarctic current probably invaded the Bermuda region some time ago.
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3599
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Chen C, Le Fevre RJW. The Conformation of 1,4-Cyclohexanedione and the Two Isomeric 1,4-Dithiane-1,4-dioxides. Aust J Chem 1963. [DOI: 10.1071/ch9630917] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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