4201
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Li Z, Rawlings BJ, Harrison PH, Vederas JC. Production of new polyene antibiotics by Streptomyces cellulosae after addition of ethyl (Z)-16-phenylhexadec-9-enoate. J Antibiot (Tokyo) 1989; 42:577-84. [PMID: 2722673 DOI: 10.7164/antibiotics.42.577] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Ethyl (Z)-16-phenylhexadec-9-enoate (3), an analog of ethyl oleate (2), was synthesized and added to cultures of Streptomyces cellulosae ATCC 12625 which normally produce fungichromin (1) as the principal polyene antibiotic. These cultures showed drastic reduction of fungichromin biosynthesis but afforded four new polyene antibiotics with a truncated four carbon side chain which are designated as isochainin (11) (an isomer of chainin (10], 14-hydroxyisochainin (12), 1'-hydroxyisochainin (13), and 1',14-dihydroxyisochainin (14). The close correspondence of 13C NMR chemical shifts between these compounds and fungichromin suggests that the stereochemistry at every site is exactly analogous.
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4202
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Xiao JC, Liu HJ, Han D, Li Z, Jiang JX, Qing C. [Protective effects of the pollen of Codonopsis pilosula (Franch.) Nannf. on liver lesions at the ultrastructural level]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1989; 14:42-4, 64. [PMID: 2504206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The experimental hepatic lesion of C57 mice was induced by carbon tetrachloride (CCI4), and the feeds containing pollen of Codonopsis pilosula were given to the animals. It was found by electronic microscopy that these pollens evidently reduced the hepatic steatosis, improved liver necrosis, suppressed the formation of the collagen fibrils in Disse's spaces and around central veinules. It was shown that the pollens of Codonopsis pilosula could counteract efficiently the liver lesion of mice induced by CCI4.
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4203
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Li Z, Petschek RG, Rosenblatt C. Linear electroclinic effect in a chiral nematic liquid crystal. PHYSICAL REVIEW LETTERS 1989; 62:796-799. [PMID: 10040335 DOI: 10.1103/physrevlett.62.796] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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4204
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Li Z, Rosenblatt C. Origin of the anomalous electroclinic susceptibility exponent in a ferroelectric liquid crystal. PHYSICAL REVIEW. A, GENERAL PHYSICS 1989; 39:1594-1596. [PMID: 9901411 DOI: 10.1103/physreva.39.1594] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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4205
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Woods DM, Li Z, Rosenblalt C, Yager P, Schoen PE. Electric Field Manipulation of Phospholipid Tubules: Optical Birefringence Measurements. ACTA ACUST UNITED AC 1989. [DOI: 10.1080/00268948908037157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4206
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Li Z. [A survey of Entamoeba gingivalis and Trichomonas buccalis in Xian]. ZHONGHUA KOU QIANG YI XUE ZA ZHI = ZHONGHUA KOUQIANG YIXUE ZAZHI = CHINESE JOURNAL OF STOMATOLOGY 1988; 23:307-9. [PMID: 3266133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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4207
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Perrin A, Peña O, Perrin C, Li Z, Sergent M. Improvement of the superconducting properties of YBa2Cu3O 7-x by thermal treatment. ACTA ACUST UNITED AC 1988. [DOI: 10.1051/jphys:01988004902030100] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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4208
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Li Z, Sastry S. Task-oriented optimal grasping by multifingered robot hands. ACTA ACUST UNITED AC 1988. [DOI: 10.1109/56.769] [Citation(s) in RCA: 261] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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4209
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Semkow TM, Sarantites DG, Honkanen K, Li Z, Ross M, Beene JR, Halbert ML, Hensley DC. Excitation energy division in the quasielastic region from reactions of 12 MeV/nucleon 48Ti with 150Nd. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1988; 37:169-177. [PMID: 9954426 DOI: 10.1103/physrevc.37.169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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4210
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4211
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Sobotka LG, Sarantites DG, Li Z, Dines EL, Halbert ML, Hensley DC, Lisle JC, Schmitt RP, Majka Z, Nebbia G, Griffin HC, Sierk AJ. Angular momentum dependence of complex fragment emission. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1987; 36:2713-2716. [PMID: 9954405 DOI: 10.1103/physrevc.36.2713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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4212
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Li Z, Wang LY, Yu XS. [Pre-postoperative blood gas analysis for neonatal digestive tract diseases]. ZHONGHUA WAI KE ZA ZHI [CHINESE JOURNAL OF SURGERY] 1987; 25:634-6, 668-9. [PMID: 3450495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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4213
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Li Z, Scheraga HA. Monte Carlo-minimization approach to the multiple-minima problem in protein folding. Proc Natl Acad Sci U S A 1987; 84:6611-5. [PMID: 3477791 PMCID: PMC299132 DOI: 10.1073/pnas.84.19.6611] [Citation(s) in RCA: 945] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A Monte Carlo-minimization method has been developed to overcome the multiple-minima problem. The Metropolis Monte Carlo sampling, assisted by energy minimization, surmounts intervening barriers in moving through successive discrete local minima in the multidimensional energy surface. The method has located the lowest-energy minimum thus far reported for the brain pentapeptide [Met5]enkephalin in the absence of water. Presumably it is the global minimum-energy structure. This supports the concept that protein folding may be a Markov process. In the presence of water, the molecules appear to exist as an ensemble of different conformations.
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4214
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Lian ZH, Yang HY, Li Z. Neural tube defects in Beijing-Tianjin area of China. Urban-rural distribution and some other epidemiological characteristics. J Epidemiol Community Health 1987; 41:259-62. [PMID: 3443820 PMCID: PMC1052632 DOI: 10.1136/jech.41.3.259] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Records in the obstetric wards and nurseries of 18 hospitals were reviewed and studied epidemiologically, covering about 210,000 deliveries and 1000 cases of neural tube defects (NTD). All live and still births occurred in the period 1970-84. Following the NTD classification used by Koch (1984), our case series consisted of anencephalus 50.3%, spina bifida 44.2%, and NTD with other system defects 5.5%. Overall NTD prevalence rate at birth was 4 per thousand, obviously higher than those in most other countries. Marked urban-rural differences in NTD prevalence rate at birth were observed. The rate in rural areas after correction for selection bias was still as high as 7.25 per thousand. As compared with cities and suburbs, the relative risk of NTD born to mothers in rural regions was 2.4. The male-to-female ratios were much less than 1 for various kinds of NTD. Looking at the effect of maternal age and birth order simultaneously in 12 different settings, it can be seen that prevalence of NTD was moderately higher among second and third births to women aged less than or equal to 24 and those greater than or equal to 35 years of age.
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4215
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Li Z, He GY, Rong H, Wu SF. Effects of wrapped supine, unwrapped supine and prone positions on transcutaneous oxygen tension in neonatal pneumonia. Chin Med J (Engl) 1986; 99:945-7. [PMID: 3105971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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4216
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Abstract
Eighty visual units were extracellularly recorded from the pigeon optic tectum, and the effects of iontophoretically applied acetylcholine and its antagonists, atropine and tubocurarine, on these units were examined. The results showed that acetylcholine in the avian tectum functions as an excitatory transmitter or modulator and acts predominantly through a muscarinic mode of action.
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4217
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Li Z, Asano M, Matsuda T. [Two kinds of affinity of muscarinic receptors in the intestinal smooth muscles of the mouse for acetylcholine, atropine and 3H QNB]. YAO XUE XUE BAO = ACTA PHARMACEUTICA SINICA 1986; 21:641-6. [PMID: 3577783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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4218
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Zuo QH, Zhang ZX, Li Z, Qian YP, Wu XR, Lin Q, Qu CY, Tu GZ. An epidemiological study on mental retardation among children in Chang-qiao area of Beijing. Chin Med J (Engl) 1986; 99:9-14. [PMID: 3089709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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4219
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Cheng Z, He X, Li Z. Output characteristics of an unstable confocal resonator. APPLIED OPTICS 1985; 24:4260. [PMID: 18224194 DOI: 10.1364/ao.24.004260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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4220
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Li Z, Wang LZ, He GY, Geng HQ. The incidence of neonatal pneumonia in urban and rural areas of Beijing. Chin Med J (Engl) 1985; 98:311-5. [PMID: 3926400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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4221
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Luo HC, Jia YK, Li Z. Electro-acupuncture vs. amitriptyline in the treatment of depressive states. J TRADIT CHIN MED 1985; 5:3-8. [PMID: 3849629] [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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4222
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Li Z. [Decelerating rate-dependent bundle branch block]. ZHONGHUA XIN XUE GUAN BING ZA ZHI 1984; 12:196-8. [PMID: 6532763] [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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4223
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Abstract
Squamous cell carcinoma is a rare type of breast malignancy. Three patients are described. The clinical features, histologic findings, and postoperative course are described. All three patients had operation, and two received chemotherapy and radiotherapy. Two patients are well 2 and 6 years postoperatively, and the third patient died from extensive metastases within 34 months after radical mastectomy without postoperative chemotherapy and radiotherapy.
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4224
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Li Z. [Size distribution of benzo(a)pyrene in airborne particulates]. ZHONGHUA YU FANG YI XUE ZA ZHI [CHINESE JOURNAL OF PREVENTIVE MEDICINE] 1984; 18:135-9. [PMID: 6525905] [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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4225
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Morrison DR, Lewis ML, Barlow GH, Todd P, Kunze ME, Sarnoff BE, Li Z. Properties of electrophoretic fractions of human embryonic kidney cells separated on Space Shuttle flight STS-8. ADVANCES IN SPACE RESEARCH : THE OFFICIAL JOURNAL OF THE COMMITTEE ON SPACE RESEARCH (COSPAR) 1984; 4:77-79. [PMID: 11542505 DOI: 10.1016/0273-1177(84)90456-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Suspensions of cultured primary human embryonic kidney cells were subjected to continuous flow electrophoresis on Space Shuttle flight STS-8. The objectives of the experiments were to obtain electrophoretically separated fractions of the original cell populations and to test these fractions for the amount and kind of urokinase (a kidney plasminogen activator that is used medically for digesting blood clots), the morphologies of cells in the individual fractions, and their cellular electrophoretic mobilities after separation and subsequent proliferation. Individual fractions were successfully cultured after return from orbit, and they were found to differ substantially from one another and from the starting sample with respect to all of these properties.
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