3351
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Liu Z. [[An analysis of regional differential mortality]]. REN KOU YAN JIU = RENKOU YANJIU 1986:11-8. [PMID: 12281350] [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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3352
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Liu Z, Brin KP, Yin FC. Estimation of total arterial compliance: an improved method and evaluation of current methods. THE AMERICAN JOURNAL OF PHYSIOLOGY 1986; 251:H588-600. [PMID: 3752271 DOI: 10.1152/ajpheart.1986.251.3.h588] [Citation(s) in RCA: 102] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Determination of arterial compliance in vivo has long interested physiologists. Most current methods for estimating this parameter assume that compliance is constant, i.e., that arterial pressure-volume (P-V) relations are linear, and they also assume that diastolic aortic pressure decay is an exponential function of time. Both of these assumptions, however, are questionable. This study proposes improved methods of estimating compliance based on a Windkessel model of the arterial system but which utilize the area under the pressure tracing rather than the waveform itself. Formulations accounting for both linear and three hypothetical nonlinear arterial P-V relations (exponential, logarithmic, and parabolic) are presented. Data from patients with congestive heart failure and hypertension are used for illustration. Compliances assuming linear P-V relations are reasonably close to those assuming nonlinear P-V relations only at mean aortic pressure. At end-diastolic pressure the linear assumption underestimates and at peak systolic it overestimates the compliances obtained assuming nonlinear P-V relations. The simpler linear assumption still allows a first approximation to compliance, but we show that existing methods for obtaining compliance under this assumption have severe theoretical as well as practical shortcomings. Our proposed method avoids these shortcomings primarily because deviations from an exact exponential form of the pressure wave have less influence on these compliance estimates than currently used methods.
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3353
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Liu Z. The age structure and sex ratio of China's population in 1982 (including revised data in the light of published data about servicemen). POPULATION RESEARCH (PEKING, CHINA) 1986; 3:11-15, 49. [PMID: 12268822] [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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3354
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Kuang PG, Pu CQ, Liu Z, Yin WM, Zhang FY, Liu YN. Cerebral infarction in a bilateral common carotid artery ligation model protected by radix Salviae miltiorrhizae. J TRADIT CHIN MED 1986; 6:121-4. [PMID: 3773560] [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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3355
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Misawa S, Lee E, Schiffer CA, Liu Z, Testa JR. Association of the translocation (15;17) with malignant proliferation of promyelocytes in acute leukemia and chronic myelogenous leukemia at blastic crisis. Blood 1986; 67:270-4. [PMID: 3455826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Cytogenetic studies were performed on nine patients with acute promyelocytic leukemia. Every patient had an identical translocation (15;17) or, in one case, a variant three-way rearrangement between chromosomes 7, 15, and 17. Another patient with chronic myelogenous leukemia was examined at the time of blastic crisis when the patient's bone marrow was infiltrated by hypergranular promyelocytes and blasts. Bone marrow cells contained a t(15;17) as well as a Ph1 chromosome. Only the latter abnormality was observed in the chronic phase of the disease. The translocation (15;17) was detected in all ten patients when bone marrow or peripheral blood cells were cultured for 24 hours prior to making chromosome preparations. However, the t(15;17) was not seen in three of these same cases when bone marrow cells were processed directly. These findings indicate that the t(15;17) is closely associated with acute proliferation of leukemic promyelocytes and that detection of this karyotypic defect may be influenced by the particular cytogenetic processing method used in different laboratories. An analysis of the banding pattern in the variant translocation provided additional evidence favoring chromosomal breakpoints at or very near the junction between bands 17q12 and 17q21 and at 15q22.
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MESH Headings
- Bone Marrow/pathology
- Cell Cycle
- Chromosome Banding
- Chromosomes, Human, 13-15
- Chromosomes, Human, 16-18
- Humans
- Karyotyping
- Leukemia, Myeloid/genetics
- Leukemia, Myeloid/pathology
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/pathology
- Translocation, Genetic
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3356
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Liu Z. [[Population age structure and sex ratio in 1982]]. REN KOU YAN JIU = RENKOU YANJIU 1985:7-10. [PMID: 12341402] [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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3357
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Liu Z. The development of and achievements in China's population science. POPULATION RESEARCH (PEKING, CHINA) 1985; 2:1-6. [PMID: 12280498] [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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3358
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Abstract
Expressing metyrapone interactions with ferrous cytochrome P-450 as ligand saturation by cytochrome, rather than the more conventional cytochrome saturation by ligand, an extinction coefficient of 68.5 +/- 1.8 mM-1 cm-1 for the metyrapone complex of dithionite-reduced rat hepatic microsomal cytochrome P-450 was derived. Utilizing this new extinction coefficient, the increased cytochrome P-450 present after phenobarbital induction was almost exclusively that which is able to both bind to metyrapone and form a metabolic-intermediate complex from norbenzphetamine. However, it was not the only subpopulation present in microsomes that was able to bind metyrapone, nor the only one capable of forming a metabolic intermediate complex from norbenzphetamine. Thus, neither technique alone can be used to quantitate the "phenobarbital-induced form" of cytochrome P-450.
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3359
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Liu Z, Franklin MR. High-performance liquid chromatographic separation and determination of 2-(diethylamino)ethyl diphenylpropylacetate and its metabolites from biological samples. JOURNAL OF CHROMATOGRAPHY 1985; 342:135-43. [PMID: 4044744 DOI: 10.1016/s0378-4347(00)84496-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A high-performance liquid chromatographic method for the determination of 2-(diethylamino)ethyl diphenylpropylacetate (SKF 525-A; Proadifen), its two deethylated metabolites and a hydrolytic metabolite in biological samples has been developed. From many solvent systems investigated the compounds are best separated on an ODS/Sil-X column using an acetonitrile-phosphate buffer system containing 0.2% decylamine. The use of acetonitrile overcomes limitations associated with previously published methods for separating basic compounds where decylamine was used in a methanolic eluent. With the sampling procedures used, overall recoveries from biological tissues were around 80%. The chromatographic system also separates three tricyclic antidepressants which can be used as internal standards.
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3360
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Luo XM, Wei HJ, Yang CL, Xing J, Qiao CH, Feng YM, Liu J, Liu Z, Wu Q, Liu YX. Selenium intake and metabolic balance of 10 men from a low selenium area of China. Am J Clin Nutr 1985; 42:31-7. [PMID: 4014065 DOI: 10.1093/ajcn/42.1.31] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Selenium intake and urinary and fecal Se excretion of 10 healthy men from a low Se area in China were determined for three consecutive days, in summer, fall, and winter of 1983, and the spring of 1984 while self-selected diets were being consumed. Mean daily Se intake was 8.8 micrograms/day with a range of 2.3-35.5 micrograms/day, and was far below the recommended range of safe and adequate Se intake of 50-200 micrograms Se/day (National Academy of Sciences/National Research Council). Mean urinary and fecal Se outputs were 3.7 and 3.4 micrograms Se/day, respectively. Mean Se balance during this time was +1.8 micrograms Se/day. Apparent absorption of Se approximated 57%. The low Se intake in this area is a cause for concern since the residents of Molimo may be at risk for Se deficiency diseases.
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3361
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Liu Z. Marx's scientific theory of surplus population. POPULATION RESEARCH (PEKING, CHINA) 1985; 2:1-5. [PMID: 12314258] [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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3362
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Iversen PL, Liu Z, Franklin MR. Selective changes in cytochrome P-450 and UDP-glucuronosyltransferase subpopulations following partial hepatectomy in rats. Toxicol Appl Pharmacol 1985; 78:10-8. [PMID: 3929423 DOI: 10.1016/0041-008x(85)90299-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Following 65% hepatectomy in adult male rats, the cytochrome P-450 in the residual liver decreased continuously from 1.0 to approximately 0.5 nmol/mg protein over a period of 2 to 3 days, and then recovered slowly to presurgery values by 14 days. In contrast UDP-glucuronosyltransferase activity (per mg protein) declined (25 to 40% depending on the aglycone used to assay the enzyme) for only 1 day, with a rapid recovery to presurgery values by 5 days. Transferase activity toward estrone overshot control values during recovery and was elevated above its presurgery value at 7 days. The changes in drug-metabolizing enzymes were accompanied by a surge in mitosis which peaked at 2 days. The extent of the decline in cytochrome P-450 and the increase in the mitotic index were proportional to the amount of liver removed. The decline in cytochrome P-450 was selective for cytochrome P-450 which elutes in the void volume upon anion-exchange high-pressure liquid chromatography of solubilized microsomes. Accompanying the decline in cytochrome P-450 in this eluate was a decline in protein(s) with a molecular weight of 51,500. The decline in cytochrome P-450 also caused disproportionate decreases in microsomal ethylmorphine N-demethylase activity and metabolic-intermediate complex formation from norbenzphetamine and SKF 525-A, but not in p-nitroanisole O-demethylase activity, metabolic-intermediate complex formation from isosafrole or metyrapone binding to cytochrome P-450.
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3363
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Liu Z. Preliminary analysis on China's employed population. POPULATION RESEARCH (PEKING, CHINA) 1985; 2:19-35. [PMID: 12268513] [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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3364
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Liu Z, Franklin MR. Separation of four glucuronides in a single sample by high-pressure liquid chromatography and its use in the determination of UDP glucuronosyltransferase activity toward four aglycones. Anal Biochem 1984; 142:340-6. [PMID: 6442104 DOI: 10.1016/0003-2697(84)90474-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A single-solvent, reverse-phase HPLC system that separates glucuronides has been developed, and its applicability to the separation of glucuronides of four substrates (1-naphthol, morphine, testosterone, and estrone), representative of different UDP-glucuronosyltransferase enzymes, has been demonstrated. The combined supernatants from four separate microsomal incubations from which the protein has been precipitated can be used directly for the quantitation of the glucuronides formed. Variations in the four enzyme activities, upon treatment of rats with microsomal enzyme-inducing agents, after liver trauma and in the Gunn strain of rats have been investigated.
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3365
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Liu Z. [Effect of fluoride on the growth and adherence of Streptococcus mutans]. ZHONGHUA KOU QIANG KE ZA ZHI [CHINESE JOURNAL OF STOMATOLOGY] 1984; 19:133-6. [PMID: 6598131] [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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3366
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Cockayne DJH, Peouz P, Liu Z, Anstis GR, Karnthaler P. A quantitative analysis of image contrast from extrinsic stacking faults. ACTA ACUST UNITED AC 1984. [DOI: 10.1002/pssa.2210820212] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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3367
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Liu Z, Franklin MR. Cytochrome P-450 metabolic-intermediate complex formation from p-aminobenzoic acid esters and other arylamines. Eur J Drug Metab Pharmacokinet 1984; 9:155-9. [PMID: 6611263 DOI: 10.1007/bf03189619] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Metabolism of a series of p-aminobenzoic acid esters by rat liver microsomal fractions resulted in the formation of cytochrome P-450 metabolic - intermediate complexes. With conditions that allowed complex formation to proceed to completion, about 20% of control rat cytochrome P-450 was sequestered as a complex. Phenobarbital, but not beta-naphthoflavone induced additional cytochrome P-450, which with specific esters could be complexed to about 60%. For other esters, the induced cytochrome maximally complexed to about 20%, as was seen in uninduced rats. The two groups of p-aminobenzoic acid esters could not be readily delineated by lipid/water partition coefficients or steric factors.
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3368
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Liu Z. [Change of population policy and the population situation in China]. REN KOU YAN JIU = RENKOU YANJIU 1984:9-12. [PMID: 12159336] [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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3369
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Liu Z. [Age estimation by teeth]. ZHONGHUA KOU QIANG KE ZA ZHI [CHINESE JOURNAL OF STOMATOLOGY] 1984; 19:50-2. [PMID: 6593193] [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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3370
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Liu Z. Some problems about population investment. POPULATION RESEARCH (PEKING, CHINA) 1983; 1:15-24. [PMID: 12313974] [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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3371
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Liu Z, Wu C, Lin F. Five proposals re China's population growth control. POPULATION RESEARCH (PEKING, CHINA) 1983; 1:1-8. [PMID: 12313973] [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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3372
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Liu Z. [The role of population in social development]. REN KOU YAN JIU = RENKOU YANJIU 1982:6-7. [PMID: 12339506] [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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3373
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Liu Z. [Several problems concerning population investment]. REN KOU YAN JIU = RENKOU YANJIU 1982:1-7. [PMID: 12159361] [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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3374
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Liu Z. [Birth rate, fertility rate, and reproduction rate]. REN KOU YAN JIU = RENKOU YANJIU 1981:56-60. [PMID: 12264405] [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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3375
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Liu Z. [Clinical and pathologic observations of odontogenic adenomatoid tumor (ten cases) (author's transl)]. ZHONGHUA KOU QIANG KE ZA ZHI [CHINESE JOURNAL OF STOMATOLOGY] 1980; 15:146-7. [PMID: 6939545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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