4201
|
Tanner CM, Chen B, Wang W, Peng M, Liu Z, Liang X, Kao LC, Gilley DW, Goetz CG, Schoenberg BS. Environmental factors and Parkinson's disease: a case-control study in China. Neurology 1989; 39:660-4. [PMID: 2710356 DOI: 10.1212/wnl.39.5.660] [Citation(s) in RCA: 116] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
We studied the role of environment in the development of Parkinson's disease (PD) in China, where industrialization is relatively recent and the population geographically stable. Using a case-control method, we investigated the relationship between PD and exposure to the following factors before disease onset: place of residence, source of drinking water, environmental and occupational exposure to various agricultural and industrial processes. Occupational or residential exposure to industrial chemicals, printing plants, or quarries was associated with an increased risk of developing PD. In contrast, living in villages and exposure to the common accompaniments of village life, wheat growing and pig raising, were associated with a decreased risk for PD. PD cases and controls did not differ with respect to other factors investigated. These findings are consistent with the hypothesis that environmental exposure to certain industrial chemicals may be related to the development of PD.
Collapse
Affiliation(s)
- C M Tanner
- Department of Neurological Sciences, Rush-Presbyterian-St. Luke's Medical Center, Chicago, IL 60612
| | | | | | | | | | | | | | | | | | | |
Collapse
|
4202
|
Guo AK, Liu Z, Feng CH. Computer simulations of figure-ground discrimination in the visual system of the fly. Sci China B 1989; 32:78-87. [PMID: 2742750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Figure-ground discrimination and pattern discrimination represent one of the most important problems in computer vision. Based on computational neuronal network model proposed by Reichardt et al. for figure-ground discrimination in the visual system of the fly, entire systematic computer simulations were carried out under nonstationary conditions. Results show that the model network and simulations have predictive power for behavioural experimental results. This paper proposes that motion perception and elementary pattern discrimination in human visual system may be mediated by some kind of figure-ground system with movement detectors as input layer.
Collapse
Affiliation(s)
- A K Guo
- Institute of Biophysics, Academia Sinica, Beijing
| | | | | |
Collapse
|
4203
|
Liu Z, Goldstein S, Goldstein A. Urban-rural and educational differentials in marital status in China. Asian Pac Popul Forum 1989; 3:9-18, 28-32. [PMID: 12282641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
Since 1950, laws aimed at delaying marriage have been 1 of the major means of slowing population growth in China, where marriage is nearly universal. Age at marriage has risen in recent decades, but not to the same extent in all localities. This article uses cross-tabulated data from China's 1982 census to assess the effects of urban-rural residence and educational level on the ages at which men and women have been marrying. The data also reveal the effects of residence and education on widowhood, divorce, and current marital status. As expected, exposure to development, indicated by urban residence and higher education, is associated with later marriage, but it also increases the likelihood of ever marrying, especially for men. Women's tendency to seek social mobility by marrying men from economically more developed areas results in bachelorhood for a substantial percentage of rural men, especially those who are illiterate.
Collapse
|
4204
|
Liu Z, Liu L. An analysis of social consequences of rapid fertility decline in China. Popul Res 1988; 5:17-30. [PMID: 12282093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
4205
|
Liu Z. [Risk factors in hypertensive farmers in Yu county of Shanxi Province]. Zhonghua Xin Xue Guan Bing Za Zhi 1988; 16:273-4. [PMID: 3234215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
4206
|
Liu Z, Wang Z, Li YS, Yan XL, Sun DD, Xiao HY, Zhu XF, He DG, Huang DH, Lu HB. [Screening of 6314 children in Chengdu for hematuria, proteinuria and bacteriuria]. Hua Xi Yi Ke Da Xue Xue Bao 1988; 19:297-300. [PMID: 3253177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
4207
|
Liu Z, Welsch G. Literature Survey on Diffusivities of Oxygen, Aluminum, and Vanadium in Alpha Titanium, Beta Titanium, and in Rutile. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/bf02628396] [Citation(s) in RCA: 105] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
4208
|
Liu Z. Further development of demography by linking closely with China's reality--a summary of statements at the Seminar on Population Theoretical Issues. Popul Res 1988; 5:1-7. [PMID: 12281751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
4209
|
|
4210
|
|
4211
|
McKenzie DR, Cockayne DJB, Liu Z, Dwarte DM, Song SA. The structure of boron- and phosphorus-doped amorphous silicon thin films. Acta Crystallogr A 1987. [DOI: 10.1107/s0108767387081820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
4212
|
Liu Z, Bushnell WR, Brambl R. Pontentiometric cyanine dyes are sensitive probes for mitochondria in intact plant cells : kinetin enhances mitochondrial fluorescence. Plant Physiol 1987; 84:1385-90. [PMID: 16665615 PMCID: PMC1056783 DOI: 10.1104/pp.84.4.1385] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Selected fluorescent dyes were tested for uptake by mitochrondria in intact cells of barley, maize, and onion. The cationic cyanine dye 3,3'-diheptyloxacarbocyanine iodide [DiOC(7)(3)] accumulated in mitochondria within 15 to 30 minutes without appreciable staining of other protoplasmic constituents. The number, shape, and movement of the fluorescent mitochondria could be seen readily, and the fluorescence intensity of the mitochondria could be monitored with a microscope photometer. Fluorescence was eliminated in 1 to 5 minutes by the protonophore carbonyl cyanide m-chlorophenylhydrazone (CCCP) indicating that maintenance of dye concentration was dependent on the inside-negative transmembrane potential maintained by functional mitochondria. Fluorescence of prestained mitochondria was enhanced within 5 to 10 minutes after addition of 0.1 millimolar kinetin to cells. The fluorescence in kinetintreated cells was dissipated by CCCP. These results suggest that kinetin interacted with respiratory processes resulting in higher potential across the mitochondrial membrane.
Collapse
Affiliation(s)
- Z Liu
- Department of Plant Pathology, University of Minnesota, St. Paul, Minnesota 55108
| | | | | |
Collapse
|
4213
|
Kuang PG, Pu CQ, Liu Z, Yin WM, Zhang FY, Liu YN. Effect of huoxue huayu composita on TXB2 levels in ischemic rat brain. J TRADIT CHIN MED 1987; 7:119-22. [PMID: 3448390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
4214
|
Henning W, Bell WA, Billquist PJ, Glagola BG, Kutschera W, Liu Z, Lucas HF, Paul M, Rehm KE, Yntema JL. Calcium-41 Concentration in Terrestrial Materials: Prospects for Dating of Pleistocene Samples. Science 1987; 236:725-7. [PMID: 17748311 DOI: 10.1126/science.236.4802.725] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Calcium-41 has been suggested as a new tool for radiometric dating in the range of 10(5) to 10(6) years. The concentration of cosmogenic calcium-41 in natural samples of terrestrial origin has now been determined by high-sensitivity accelerator mass spectrometry after pre-enrichment in calcium-41 with an isotope separator. Ratios of calcium-41 to total calcium between 2 x 10(-14) and 3 x 10(-15) were measured for samples of contemporary bovine bone and from limestone deposits. Some prospects for the use of calcium-41 for dating Middle and Late Pleistocene bone and for other geophysical applications are discussed.
Collapse
|
4215
|
Wang Z, An Y, Liu Z, Zhu GQ, Huang RS. [Effect of 3,4-dihydroxyacetophenone on TXA2 release from rabbit platelets]. Yao Xue Xue Bao 1987; 22:330-4. [PMID: 3687457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
4216
|
Liu Z. [Clinical and bacteriological study of the conservative treatment of deep carious lesions]. Zhonghua Kou Qiang Yi Xue Za Zhi 1987; 22:82-5, 126-7. [PMID: 3476280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
4217
|
Li F, Qin J, Liu Z, Wu Z, Qian B. Compatibility and Water Retentive Properties of Polyacrylonitrile Copolymer and Polyvinyl Acetate Copolymer Blend Fibers. Journal of Polymer Engineering 1987. [DOI: 10.1515/polyeng.1987.7.2.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
4218
|
Abstract
Chinese hospitals in the 1980s are in the midst of a technological revolution. Based upon data from several regions in China, this paper describes the political, organizational, economic, and philosophical changes which have accompanied the shift in focus from primary care medicine to high technology tertiary care. The increased authority of physicians, greater contact with the West, and increased funding for medical equipment are key factors in these changes. Although the Chinese state continues to control the administration and financing of most hospitals, the decentralizing reforms of Deng Xiaoping have undermined its ability to effectively plan for, and assess new technology. At present, limited resources prevent most regions from excessive technology acquisition, but the state must rebuild its planning capacity in order to foster rational allocation of scarce medical resources.
Collapse
|
4219
|
Feng-Chen KC, Chen BF, Liu Z, Ng AK. Application of avidin-biotin-peroxidase complex method with a monoclonal antibody to human Ia-like antigen in immunoelectron microscopy. J Histochem Cytochem 1986; 34:1495-9. [PMID: 3534079 DOI: 10.1177/34.11.3534079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Monoclonal antibody (MAb) to human Ia-like (HLA-DR) antigen was applied with the avidin-biotin-peroxidase complex (ABC) immunostaining method to localize the Ia-like antigen at the electron microscopic level. Our results indicated that in human tonsils and adenoids fixed with 4-6% phosphate-buffered paraformaldehyde for 4-6 hr, sharply delineated electron-dense products of the antigen and antibody complex were detectable on the outer cell membranes of lymphoblasts, lymphocytes, reticular cells, and macrophages. In our study, the vibratome sections of the paraformaldehyde-fixed, pre-embedding immunostained tissues consistently showed more satisfactory morphology than frozen sections. The combined use of the anti-human Ia monoclonal antibody and the ABC procedure with paraformaldehyde fixation provides a simple and sensitive method to study at the ultrastructural level the Ia-like antigen-bearing cells, which are vital in the immune response.
Collapse
|
4220
|
Liu Z. [[An analysis of regional differential mortality]]. Renkou Yanjiu 1986:11-8. [PMID: 12281350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
4221
|
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.
Collapse
|
4222
|
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). Popul Res 1986; 3:11-15, 49. [PMID: 12268822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
4223
|
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] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
4224
|
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] [What about the content of this article? (0)] [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.
Collapse
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
Collapse
|
4225
|
Liu Z. [[Population age structure and sex ratio in 1982]]. Renkou Yanjiu 1985:7-10. [PMID: 12341402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
|
4226
|
Liu Z. The development of and achievements in China's population science. Popul Res 1985; 2:1-6. [PMID: 12280498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
4227
|
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.
Collapse
|
4228
|
Liu Z, Franklin MR. High-performance liquid chromatographic separation and determination of 2-(diethylamino)ethyl diphenylpropylacetate and its metabolites from biological samples. J Chromatogr 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] [What about the content of this article? (0)] [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.
Collapse
|
4229
|
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] [What about the content of this article? (0)] [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.
Collapse
|
4230
|
Liu Z. Marx's scientific theory of surplus population. Popul Res 1985; 2:1-5. [PMID: 12314258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
4231
|
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] [What about the content of this article? (0)] [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.
Collapse
|
4232
|
Liu Z. Preliminary analysis on China's employed population. Popul Res 1985; 2:19-35. [PMID: 12268513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
4233
|
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] [What about the content of this article? (0)] [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.
Collapse
|
4234
|
Liu Z. [Effect of fluoride on the growth and adherence of Streptococcus mutans]. Zhonghua Kou Qiang Ke Za Zhi 1984; 19:133-6. [PMID: 6598131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
4235
|
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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
4236
|
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] [What about the content of this article? (0)] [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.
Collapse
|
4237
|
Liu Z. [Change of population policy and the population situation in China]. Renkou Yanjiu 1984:9-12. [PMID: 12159336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
|
4238
|
Liu Z. [Age estimation by teeth]. Zhonghua Kou Qiang Ke Za Zhi 1984; 19:50-2. [PMID: 6593193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
4239
|
Liu Z. Some problems about population investment. Popul Res 1983; 1:15-24. [PMID: 12313974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
4240
|
Liu Z, Wu C, Lin F. Five proposals re China's population growth control. Popul Res 1983; 1:1-8. [PMID: 12313973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
4241
|
Liu Z. [The role of population in social development]. Renkou Yanjiu 1982:6-7. [PMID: 12339506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
|
4242
|
Liu Z. [Several problems concerning population investment]. Renkou Yanjiu 1982:1-7. [PMID: 12159361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
|
4243
|
Liu Z. [Birth rate, fertility rate, and reproduction rate]. Renkou Yanjiu 1981:56-60. [PMID: 12264405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
4244
|
Liu Z. [Clinical and pathologic observations of odontogenic adenomatoid tumor (ten cases) (author's transl)]. Zhonghua Kou Qiang Ke Za Zhi 1980; 15:146-7. [PMID: 6939545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|