8501
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Cai YY, Xu CL, Li SH, Liu Y. [Sister chromatid exchange induced by antitumor and antiparasitic drugs before and after activation by microsomal enzyme S-9]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1983; 5:161-4. [PMID: 6226411] [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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8502
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Xue SP, Liang DC, Fei RR, Chen XM, Ye SJ, Liu Y, Wu YW, You MM, Guo XY. Subcellular site of antispermatogenic effect of gossypol and its possible molecular mechanism of action. SCIENTIA SINICA. SERIES B, CHEMICAL, BIOLOGICAL, AGRICULTURAL, MEDICAL & EARTH SCIENCES 1983; 26:614-33. [PMID: 6623054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
This paper reports the results of gossypol effects on the testicular mitochondrial ultrastructures and functions. A hypothesis of mechanism of gossypol action based on our experimental data was postulated. Electron microscopic observations confirmed further our previous studies that the mitochondria of the target germ cells were the most sensitive and the most severely damaged among cellular organelles in response to gossypol. The damages included the swelling, vacuolation, crista depletion, lysis, granular accumulation in matrix and the process of intact mitochondria disintegration. The activity of the mitochondrial marker enzyme, the LDH-X of human spermatozoa, was markedly decreased or suppressed completely after gossypol treatment. The functions of isolated testicular mitochondria determined by Warburg manometric and oxygen electrode polarographic methods indicated that gossypol stimulated respiration but inhibited slightly the oxidative phosphorylation at low concentrations (20-40 microM) in vitro. With the increase in concentration of gossypol, the mitochondrial respiration and phosphorylation decreased obviously, they were completely inhibited at a concentration of 80 microM for oxidative phosphorylation and at about 300 microM for respiration. The degree of uncoupling of phosphorylation appears to be dose-dependent. Similar results were obtained for the testicular mitochondria isolated from rats that had been administered per os gossypol previously (6 mg, 10 mg and 15 mg/day X 21 respectively), in which the P/0 ratio decreased significantly (P less than 0.001) as compared with that of the control group. The distribution of 14C-gossypol in mitochondrial was found to be 2-3 times higher than that in other subcellular fractions. Similar pattern of distribution was shown in double labeling experiments with 14C-gossypol and 3H-ouabain.
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8503
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Hoffman NE, Liu Y, Yang SF. Changes in 1-(malonylamino)cyclopropane-1-carboxylic acid content in wilted wheat leaves in relation to their ethylene production rates and 1-aminocyclopropane-1-carboxylic acid content. PLANTA 1983; 157:518-523. [PMID: 24264416 DOI: 10.1007/bf00396882] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/1982] [Accepted: 12/15/1982] [Indexed: 06/02/2023]
Abstract
In excised wheat (Triticum aestivum L.) leaves, water-deficit stress resulted in a rapid increase, followed by a decrease, in ethylene production rates and in the levels of 1-aminocyclopropane-1-carboxylic acid (ACC), the immediate precursor of ethylene. However, the level of N-malonyl-ACC (MACC), the major metabolite of ACC, increased gradually, then leveled off. This increase in MACC was much greater than the decrease in ACC level. The MACC levels were positively correlated with severity of water stress. Once established, the MACC levels did not decrease even after the stressed tissues were rehydrated. Administration of labeled ACC and MACC showed that the conjugation of ACC to MACC was essentially irreversible. Repeated wilting treatments following the first wilting and rehydration cycle resulted in no further increase in ethylene production and in the levels of ACC and MACC. However, when benzyladenine was supplied during the preceding rehydration process, subsequent wilting treatment resulted in a rise in MACC level and a rapid rise followed by a decline in ethylene production rates and in the level of ACC. The magnitude of these increases was, however, smaller in these rewilted tissues than that observed in the first wilting treatment. Since MACC accumulates with water stress and is not appreciably metabolized, the MACC level is a good indicator of the stress history in the detached leaves used.
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8504
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Li G, Gao X, Zhang C, Liao Z, Lin Z, Yue S, Liu Y. [Microscopic observation of the adherence of Streptococcus mutans]. SICHUAN YI XUE YUAN XUE BAO = ACTA ACADEMIAE MEDICINAE SICHUAN 1983; 14:57-61. [PMID: 6573028] [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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8505
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Yin WB, Zhang L, Miao Y, Yu Z, Zhang Z, Zhueng C, Wang M, Li G, Liu Y, Jia Y, Ku X. The results of high-energy electron therapy in carcinoma of the oesophagus compared with telecobalt therapy. Clin Radiol 1983; 34:113-6. [PMID: 6401610 DOI: 10.1016/s0009-9260(83)80403-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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8506
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Feng CY, Hu YM, Liu Y, Kuang MS, Wang XX, Ren HX, Liu LZ, Yang Y, Deng BZ. [Effects of nitroquine on sporogenic cycle of Plasmodium cynomolgi]. ZHONGGUO YAO LI XUE BAO = ACTA PHARMACOLOGICA SINICA 1982; 3:273-6. [PMID: 6219546] [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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8507
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Ji XJ, Liu Y, Lin H, Liu ZM. [Metabolism of homoharringtonine in rats and mice]. YAO XUE XUE BAO = ACTA PHARMACEUTICA SINICA 1982; 17:881-8. [PMID: 7183119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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8508
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Liu Y, Budd RD, Griesemer EC. Study of the stability of cocaine and benzoylecgonine, its major metabolite, in blood samples. J Chromatogr A 1982; 248:318-20. [PMID: 7174764 DOI: 10.1016/s0021-9673(00)87285-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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8509
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Budd RD, Liu Y. Phencyclidine concentrations in postmortem body fluids and tissues. JOURNAL OF TOXICOLOGY. CLINICAL TOXICOLOGY 1982; 19:843-50. [PMID: 7182512 DOI: 10.3109/15563658208992517] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Phencyclidine (PCP) concentrations have been studied in the blood and tissues of Los Angeles County victims whose deaths were related to PCP use. In most cases PCP blood concentrations ranged from 0.01 to 0.9 micrograms/mL while higher concentrations were found in the liver, urine, bile, brain, and kidney.
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8510
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Jiang B, Liu Y. An analysis on the equivalence of the eye to a system with aberration. SCIENTIA SINICA. SERIES B, CHEMICAL, BIOLOGICAL, AGRICULTURAL, MEDICAL & EARTH SCIENCES 1982; 25:970-980. [PMID: 7146874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Computed transfer functions for epsilon = 0.60 and 0.75 annular pupils of 2.67 mm o.d. show that absorption of the average spherical aberration of the eye is still incomplete but if the eye is so designed as to adjust its focal plane in order to achieve a best Strehl ratio, it would show a transfer function approaching that of a diffraction limited system, i.e. the optical defect of the eye is overcompensated. However, it is argued that a varying amount of focusing adjustment of the eye is needed in order to account for the transfer function of the eye of different pupil sizes, though not always to the extent of achieving a best Strehl ratio. Such a property of the eye is referred to variously as the antidefocusing, deblurring or contrast constancy phenomenon and, when operationally defined, this is equivalent to saying that the eye has a greater depth of focus than that defined for a physical system based upon a fixed demodulation criterion. The significance of the physiological depth of the eye is discussed.
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8511
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Liu Y, Gong GL. Clinical observation of amniotic fluid creatinine as an index of fetal maturity. Chin Med J (Engl) 1982; 95:697-702. [PMID: 6817997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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8512
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Liu Y. [The method of measuring probability of the annual fertility]. REN KOU YAN JIU = RENKOU YANJIU 1982:52-4, 58. [PMID: 12159362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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8513
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Liu Y. [For controlling population growth more scientifically]. REN KOU YAN JIU = RENKOU YANJIU 1982:18-21, 62. [PMID: 12265438] [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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8514
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Liu Y. [Preliminary observation on the secretion of thyroxine and insulin following trauma]. ZHONGHUA WAI KE ZA ZHI [CHINESE JOURNAL OF SURGERY] 1982; 20:403-5. [PMID: 6756825] [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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8515
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Liu Y. [Study of self-regulating mechanisms from the viewpoint of cell biology]. SHENG LI KE XUE JIN ZHAN [PROGRESS IN PHYSIOLOGY] 1982; 13:201-7. [PMID: 7178887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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8516
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Li S, Fan MC, Li SS, Liu Y, Wang MS. [Studies on the mechanism of carcinogenesis. V. Differential changes in activities of enzymes involved in ornithine metabolism in early phase of hepatocarcinogenesis induced by diethylnitrosamine]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1982; 4:141-6. [PMID: 6215136] [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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8517
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Woodford BJ, Liu Y, Fletcher RT, Chader GJ, Farber DB, Santos-Anderson R, Tso MO. Cyclic nucleotide metabolism in inherited retinopathy in collies: a biochemical and histochemical study. Exp Eye Res 1982; 34:703-14. [PMID: 6282610 DOI: 10.1016/s0014-4835(82)80031-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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8518
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Zhou LF, Lei HP, Gao Y, Liu Y, Wang NY, Guo Y. [Further observations on the effect of prolonged administration of gossypol acetic acid to rats]. YAO XUE XUE BAO = ACTA PHARMACEUTICA SINICA 1982; 17:245-52. [PMID: 7136708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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8519
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Yao TQ, Liu Y, Chen ZH, Cui JR. Blood-gas analysis in 50 traumatic surgery cases. Chin Med J (Engl) 1982; 95:227-30. [PMID: 6807632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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8520
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Liang DC, Fei RR, Liu Y, Yang SL, Su SY, Guo XY, Liu ZH, Zhou ZH, Xue SP. [Studies on distribution of 14C-gossypol in subcellular fractions of rat testes and site of gossypol action (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1981; 3:153-7. [PMID: 6459173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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8521
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Nakamura GR, Liu Y, Noguchi TT. A method for the separation and determination of neutral compounds in postmortem tissues. J Anal Toxicol 1981; 5:162-4. [PMID: 7278153 DOI: 10.1093/jat/5.4.162] [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: 01/24/2023] Open
Abstract
A convenient method for the extraction of neutral drugs in necrotic tissues is described. The procedure includes the use of hot dilute acid for isolating neutrals from tissue extract residues and of internal standard to facilitate quantitative and recovery measurement of the drugs by gas chromatography. The recovery of seven neutral compounds from liver ranged from 47.0% to 89.3%. The limit of detection of these drugs were 0.5 to 1.0 mg/kg.
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8522
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Shen YF, Cheng XK, Zhang YR, Liu Y, Wang SZ. [Studies on lymphokines. III. Preliminary report of an immunochemical method for the determination of cell-mediated immunity (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1981; 3:10-3. [PMID: 6458385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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8523
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Matzie RA, Leung DC, Liu Y, Beekmann RW. The Benefits of Cycle Stretchout in Pressurized Water Reactor Extended-Burnup Fuel Cycles. NUCL TECHNOL 1981. [DOI: 10.13182/nt81-a32664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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8524
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Bhat NP, Borgstedt HU, Emami AA, Loyalka SK, Meier WR, Ott KO, Marchaterre JF, Matzie RA, Leung DC, Liu Y, Beekmann RW, Badruzzaman A, Becker M, Shields JA, Simms R, Gehl SM, Lo RK, Rothman AB, Bullock RE, Nuttall HE, Ray AK, Davis EJ, Gilbert ER, Chin BA, Williams JA, Baxter W, Collins G, Harding K, Leslie CM, Sills RJ, Môrk TD, Pahl M, Vartanian R, Chawla R, Mailen JC, Lillie RA, Santoro RT, Alsmiller RG. Authors. NUCL TECHNOL 1981. [DOI: 10.13182/nt81-a32659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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8525
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Kimura S, Tada N, Liu Y, Hämmerling U. A new mouse cell-surface antigen (Ly-m18) defined by a monoclonal antibody. Immunogenetics 1981; 13:547-54. [PMID: 6974693 DOI: 10.1007/bf00343722] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Spleen cells from C3H/An mice immunized with spleen cells of C57BL/6-H-2k mice were fused with myeloma cell line NS.1. One established hybrid cell line continuously secreted antibody that recognized a new surface antigen provisionally called Ly-m18. The new alloantigen is expressed on 90 percent of thymus cells, 55 percent of spleen cells, and 45 percent of either lymph-node or bone-marrow cells. It is also expressed on cells derived from brain, kidney, and liver. Fifty percent of either peripheral T or B cells express the Ly-m18 antigen, and some tumor cell lines with T, B, pre-B or stem cell characteristics are Ly-m18 (+). The strain distribution pattern distinguishes Ly-m18 antigen from all other murine lymphocyte alloantigens. The typing data of two sets of CXB and AKXL recombinant inbred strains indicate that the Ly-m18 gene is linked to the Ltw-2 locus which has not yet been assigned to a chromosome.
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