4726
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Zhang Z, Su C, Chen D. [Comparison of bacteriostatic ability of oleum of Perilla frutescens (L.) Britt., Cinnamomum cassia Presl and Nipagin A]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1990; 15:95-7, 126-7. [PMID: 2390180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A comparison of bacteriostatic ability has been carried out among oleum of Perilla frutescens and Cinnamomum cassia, benzoic acid and nipagin A. The result shows that the inhibiting effect of Perilla frutescens and Cinnamomum cassia on microorganisms inoculated and spontaneously contaminated is similar to or obviously superior to nipagin A and benzoic acid.
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4727
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Grossweiner LI, Karagiannes JL, Johnson PW, Zhang Z. Gaussian beam spread in biological tissues. APPLIED OPTICS 1990; 29:379-383. [PMID: 20556117 DOI: 10.1364/ao.29.000379] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Flux density distributions were measured in large tissue sections illuminated with 633- and 1064-nm laser radiation delivered by an optical fiber. The results were modeled by solving the 2-D diffusion approximation for an incident Gaussian beam and fitting the data with nonlinear regression. It is shown that the radial average flux density is exponentially attenuated for an arbitrary incident irradiance profile.
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4728
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Wong TT, Zhang Z, Sachtler WMH. Erratum. Catal Letters 1990. [DOI: 10.1007/bf00764679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4729
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Marsh C, Zhang Z, Edwards JO. The Cerium(IV)-Induced Decomposition of Peroxymonosulfate: Acid Dependence and Peroxydisulfate Formation. Aust J Chem 1990. [DOI: 10.1071/ch9900321] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
An improved rate law for the CeIV-induced decomposition of HOOSO3- in aqueous H2SO4 has been established by study of the rate as a function of acidity. In aqueous HClO4 the rate is much faster but a rate law could not be obtained. Peroxydisulfate, by a variant of the AsIII and FeII analysis of the redox system, has been shown to be formed in the amount of half of the CeIV lost. A free-radical chain mechanism is postulated.
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4730
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Howard JM, Zhang Z. Pancreaticoduodenectomy (Whipple resection) in the treatment of chronic pancreatitis. World J Surg 1990; 14:77-82. [PMID: 2305589 DOI: 10.1007/bf01670549] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The armamentarium of the pancreatic surgeon must include multiple operative techniques, to be adapted to the clinical and anatomical findings in the patient with chronic pancreatitis. Pancreaticoduodenectomy is an essential component of this armamentarium. Its indications and limitations require continued refinement. Pancreaticoduodenectomy (Whipple operation) provides excellent results in the relief of the pain of chronic pancreatitis. The incidence of reoperation for control of pain after this procedure is less than after drainage procedures. The postoperative mortality rate in recent report is less than 2%. Whereas resection of pancreatic tissue diminishes pancreatic function, the metabolic deficits are partially compensated by the better nutritional status resulting from pain relief and discontinuation of narcotics. In experienced hands, pancreaticoduodenectomy would appear to be the procedure of choice in patients with small pancreatic ducts. In selected patients, it appears to be a good procedure and, possibly, the operation of choice when the disease is predominantly present in the head of the pancreas and/or the uncinate process, especially when strictures involve the common bile duct and duodenum. The authors prefer the procedure when a hard, chronically-inflamed mass is present in the head of the pancreas. In our experience, if the suspicion of malignancy of the head of the pancreas persists at operation, pancreaticoduodenectomy is the procedure of choice. Before undertaking resection, the individual surgeon must assess his/her own experience; a low risk is essential. The continuing alcoholic is not a candidate for pancreaticoduodenectomy. Those who will not stop drinking should seldom be accepted for resection. The same limitation exists for the narcotic addict, but few such patients are encountered today. In the authors' experience, the operation is excellent for the relief of pain. It is the lifestyle of the continuing alcoholic that poses the more significant problem.
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4731
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Huang T, Huang Z, Zhang Z. Nonperturbative effects on the Wilson coefficients and the Delta I=(1/2 rule in kaon decays. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1989; 40:3627-3634. [PMID: 10011740 DOI: 10.1103/physrevd.40.3627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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4732
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Warner RE, Berland KM, Hinnefeld JD, Zhang Z, Zhu YT, Hu XQ, Li S. Total nuclear reaction probabilities and average cross sections for 27 to 92 MeV alpha particles in silicon. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1989; 40:2473-2478. [PMID: 9966259 DOI: 10.1103/physrevc.40.2473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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4733
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4734
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Abstract
An electrical impedance tomography (EIT) system has been constructed, operating at two frequencies, 40.96 and 81.92 kHz, for investigating the practicability of the dual-frequency imaging method discussed theoretically in a previous paper. For testing the system, a phantom with a frequency-dependent electrical conductivity was designed. The properties of the phantom can be adjusted to match the frequency dependence observed in a given type of tissue. Dual-frequency images were obtained from a phantom simulating liver and also from 200 g of porcine liver in a saline tank. Prior to image reconstruction, it was necessary to apply a correction to the data to cancel the effects of stray capacitance within the electronics.
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4735
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Zhang Z, Bhargava KK, Chun SB, Blaufox MD, Chervu LR. Technetium-99m labeled p-aminohippuric acid analogues: renal function agents. J Pharm Sci 1989; 78:829-32. [PMID: 2600788 DOI: 10.1002/jps.2600781010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A number of p-aminohippuric acid analogues were synthesized in order to develop clinically useful 99mTc-labeled radiopharmaceuticals for evaluation of renal function measurements. Stable 99mTc-labeled complexes were formed at pH 5.7 using a Sn(II) reduction method with all derivatives. The newly synthesized complexes were screened utilizing biodistribution studies in small animals. All complexes were excreted via the GU tract within 60 min post iv administration, with no significant activity in GI tract and liver. The [99mTc]methyl-PAHIDA complex showed optimal biodistribution among these analogues. Further investigation is needed to determine if these derivatives may be used to replace [131I]o-iodohippuric acid for the evaluation of renal function.
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4736
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Shechter H, Stern EA, Yacoby Y, Brener R, Zhang Z. Anomalous local hopping of Sn impurities in lead. PHYSICAL REVIEW LETTERS 1989; 63:1400-1403. [PMID: 10040558 DOI: 10.1103/physrevlett.63.1400] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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4737
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Karagiannes JL, Zhang Z, Grossweiner B, Grossweiner LI. Applications of the 1-D diffusion approximation to the optics of tissues and tissue phantoms. APPLIED OPTICS 1989; 28:2311-2317. [PMID: 20555517 DOI: 10.1364/ao.28.002311] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Optical constants of animal and plant tissues were measured over a wide spectral range using an integrating sphere spectrophotometer. The data were analyzed with two formulations of the 1-D diffusion approximation differing in the phase function. The accuracy of the similarity transformation was examined with tissue phantoms incorporating known chromophores in light scattering media.
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4738
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Tang HB, Ren Y, Liu YL, Yan QW, Zhang Z. Coexistence of antiferromagnetism and superconductivity in YBa2(CU1-xFex)3O7 only for x around 0.10. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:12290-12292. [PMID: 9948070 DOI: 10.1103/physrevb.39.12290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4739
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Zhang Z. Population increase and economic development: a research into the relation between the rural population and economy in China from 1949 to 1979. POPULATION RESEARCH (PEKING, CHINA) 1989; 6:1-17. [PMID: 12316066] [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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4740
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Carson RS, Zhang Z, Hutchinson LA, Herington AC, Findlay JK. Growth factors in ovarian function. JOURNAL OF REPRODUCTION AND FERTILITY 1989; 85:735-46. [PMID: 2649662 DOI: 10.1530/jrf.0.0850735] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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4741
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He F, Wang S, Liu L, Chen S, Zhang Z, Sun J. Clinical manifestations and diagnosis of acute pyrethroid poisoning. Arch Toxicol 1989; 63:54-8. [PMID: 2742502 DOI: 10.1007/bf00334635] [Citation(s) in RCA: 139] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This article reviews 573 cases of acute pyrethroid poisoning reported in the Chinese medical literatures during 1983-1988. There were 325 cases of acute deltamethrin poisoning (occupational 158, accidental 167), 196 patients of acute fenvalerate poisoning (occupational 63, accidental 133, including 2 cases of ingestive fenvalerate-organophosphate mixture poisoning), 45 cases of acute cypermethrin poisoning (occupational 6, accidental 39) and 7 cases of other pyrethroid poisoning (occupational 2, accidental 5). The clinical manifestations have been reviewed and analysed. The diagnosis, gradation and differential diagnosis of occupational acute pyrethroid poisoning have been discussed.
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4742
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Sladek NE, Manthey CL, Maki PA, Zhang Z, Landkamer GJ. Xenobiotic oxidation catalyzed by aldehyde dehydrogenases. Drug Metab Rev 1989; 20:697-720. [PMID: 2680404 DOI: 10.3109/03602538909103572] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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4743
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Steiner M, Ogg J, Zhang Z, Sun S. The Late Permian/Early Triassic magnetic polarity time scale and plate motions of south China. ACTA ACUST UNITED AC 1989. [DOI: 10.1029/jb094ib06p07343] [Citation(s) in RCA: 116] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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4744
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Ren Y, Tang HB, Yan QW, Zhang PL, Liu YL, Cui CG, Ning TS, Zhang Z, Niu SW. Neutron-diffraction study of NdBa2Cu3O7+x with x=0.06 and 0.18. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:11861-11864. [PMID: 9946085 DOI: 10.1103/physrevb.38.11861] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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4745
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Li L, Yu G, Dong S, Wang G, Zhang Z. Adsorption active sites -Key factor on the adsorption ability of pyridine molecules on Ag surfaces. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/bf00716086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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4746
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Zhang Z, Hu G, Fu P, Ye P. Observation of high-order degenerate wave mixing in BaTiO(3). OPTICS LETTERS 1988; 13:761-763. [PMID: 19746028 DOI: 10.1364/ol.13.000761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report for the first time to our knowledge some phenomena of high-order degenerate wave mixing observed in a BaTiO(3) crystal when self-pumped phase conjugation occurs. Applications of these phenomena are discussed.
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4747
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He LX, Li XZ, Zhang Z, Kuo KH. One-dimensional quasicrystal in rapidly solidified alloys. PHYSICAL REVIEW LETTERS 1988; 61:1116-1118. [PMID: 10039523 DOI: 10.1103/physrevlett.61.1116] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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4748
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Zhang Z, Li XF, Sun Y, Tao QM. New HBeAg immune binding sites found by Mc-anti-HBe. Chin Med J (Engl) 1988; 101:517-8. [PMID: 2465873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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4749
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Zhang Z, Lee VW, Carson RS, Burger HG. Selective control of rat granulosa cell inhibin production by FSH and LH in vitro. Mol Cell Endocrinol 1988; 56:35-40. [PMID: 3131168 DOI: 10.1016/0303-7207(88)90006-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We studied the role of luteinising hormone (LH) and human chorionic gonadotropin (hCG) in regulation of rat granulosa cell inhibin production. Whereas pregnant mare serum gonadotropin (PMSG) or purified rat follicle-stimulating hormone (FSH) stimulated inhibin accumulation in culture media up to 6-fold in a dose-dependent manner, hCG or LH alone were without significant effect. Concomitant addition of hCG or LH to cultures containing half maximal or maximal stimulating concentrations of PMSG did, however, result in a dose-dependent inhibition of PMSG/FSH-induced inhibin production. However, in the 2-step culture system a biphasic effect of hCG treatment on FSH-primed granulosa cell inhibin and progesterone production was evident. hCG was only inhibitory when the cells in the 2-step system were primed with PMSG. These data indicate that granulosa cell inhibin production is under direct control of both FSH and LH, and provide a possible explanation for alterations in inhibin activity around the time of ovulation in vivo.
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4750
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Zhang Z, Lawrence J, Stracher A. Phosphorylation of platelet actin binding protein protects against proteolysis by calcium dependent sulfhydryl protease. Biochem Biophys Res Commun 1988; 151:355-60. [PMID: 3348781 DOI: 10.1016/0006-291x(88)90601-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
When Actin Binding Protein (ABP) isolated from human blood platelets is phosphorylated in vitro with a cyclic AMP dependent kinase it becomes resistant to proteolysis by the Calcium Dependent Sulfhydryl Protease (CDSP). This protection against proteolytic cleavage is specific for CDSP since phosphorylation of ABP does not protect against proteolysis by trypsin, papain and thermolysin. Thus, there appears to be a distinct phosphorylation site on the ABP molecule which is essential for regulating the initial proteolytic degradation of ABP by CDSP.
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