1476
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Wakasugi M, Yang W, Jin WG, Horiguchi T. Direct observation of the Delta J=2 forbidden transition in Nd I induced by the second-order hyperfine perturbation. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 44:6115-6118. [PMID: 9906676 DOI: 10.1103/physreva.44.6115] [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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1477
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Yang W. [A brief account of event-related potentials]. ZHONGHUA SHEN JING JING SHEN KE ZA ZHI = CHINESE JOURNAL OF NEUROLOGY AND PSYCHIATRY 1991; 24:309-12. [PMID: 1752187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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1478
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Yang W, Tabata M, Kobayashi S, Yokota K, Shimizu A. Synthesis of Ultra-High-Molecular-Weight Aromatic Polyacetylenes with [Rh(norbornadiene)Cl]2-Triethylamine and Solvent-Induced Crystallization of the Obtained Amorphous Polyacetylenes. Polym J 1991. [DOI: 10.1295/polymj.23.1135] [Citation(s) in RCA: 105] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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1479
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Rorat E, Yang W, DeLaTorre R. Fine needle aspiration cytology of parapharyngeal meningioma. Acta Cytol 1991; 35:497-500. [PMID: 1927188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A unique case of parapharyngeal meningioma identified on a tomographic scan and diagnosed preoperatively by fine needle aspiration (FNA) cytology is reported. The FNA smear showed the spindle-shaped cells in concentric whorls and scattered psammoma bodies that are characteristic of meningioma. The FNA diagnosis was subsequently confirmed on the excised specimen. The preoperative cytologic diagnosis was very helpful in planning the surgical removal of the tumor by a team of otolaryngologists and neurosurgeons.
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1480
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Yang W, Mao W. Nd:YAG laser treatment of congenital persistent pupillary membrane. YAN KE XUE BAO = EYE SCIENCE 1991; 7:120-4. [PMID: 1842363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Five case of severe congenital persistent pupillary membrane were successfully treated with Nd:YAG laser. The patient's age ranged from 6 to 33 years. After operation, they not only improved their visual acuities, but also got a function of round pupil as well as cosmetic effect. The author describes his experience about the choice of laser energy and technical methods used in Nd:YAG laser treatment of persistent pupillary membrane, and discusses the intra- and post-operative complications, too. Finally, the author emphasizes that provided the operator is skillful, and the choice of laser energy used is appropriate, no severe complications will occur. The author believes that treatment of severe congenital persistent pupillary membrane with Nd:YAG laser is a safe more effective method with less complications as compared with the traditional surgical procedures, and recommends to popularize it.
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1481
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Yang W, Qian Y, Zheng D. [A micromethod for determination of serum zinc and copper concentration in infants aged 1-3 months in Chengdu]. HUA XI YI KE DA XUE XUE BAO = JOURNAL OF WEST CHINA UNIVERSITY OF MEDICAL SCIENCES = HUAXI YIKE DAXUE XUEBAO 1991; 22:201-3. [PMID: 1786961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A micromethod for the measurement of serum zinc and copper concentration of peripheral blood by wave-oscillopolarography is introduced in this article. The method is superior to the commonly used flame atomic absorption spectrophotometry (AAS) in its simplicity in sampling and operating and in its inexpensiveness. Yet the results are identical with those obtained by ASS, the method is good enough to replace ASS in clinical work, especially in the field of pediatrics. Serum zinc and copper concentrations in 243 infants aged 1-3 months in Chengdu were detected by this method. The data were found to be slowly distributed without age and sex differences. For the infants of 1-3 months in Chengdu, the reference values of serum zinc and copper concentration are 6.69-25.46 mumol/L and 8.70-28.07 mumol/L respectively.
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1482
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Yang W. Direct calculation of electron density in density-functional theory. PHYSICAL REVIEW LETTERS 1991; 66:1438-1441. [PMID: 10043209 DOI: 10.1103/physrevlett.66.1438] [Citation(s) in RCA: 558] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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1483
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Fuller L, Carreno M, Zheng S, Esquenazi V, Yang W, Miller J. Isolation of anti-OKT3 and anti-(anti-OKT3) from a kidney transplant recipient. Transplant Proc 1991; 23:305-6. [PMID: 1899306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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1484
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Yang W, Jiang TR, Davis PJ, Acosta D. In vitro metabolism and toxicity assessment of N-methylcarbazole in primary cultured rat hepatocytes. Toxicology 1991; 68:217-26. [PMID: 1896996 DOI: 10.1016/0300-483x(91)90071-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
N-Methycarbazole (NMC), a carcinogen and mutagen in tobacco smoke, was converted to two major metabolites by primary cultured rat hepatocytes as measured by high performance liquid chromatography (HPLC): N-hydroxymethylcarbazole (NHMC) and carbazole. These two metabolites had comparable retention times and identical ultraviolet spectra as those of reference standards. Identical retention times and mass spectra were also observed as detected by gas chromatography-mass spectroscopy (GC-MS) for NHMC and its reference standard. The toxicities of NMC and its two metabolites were assessed by lactate dehydrogenase (LDH) leakage and neutral red (NR) uptake. The rank order of cytotoxicity of NMC and its metabolites was found to be: NHMC greater than NMC greater than carbazole. Thus, we conclude that the hydroxylation of NMC to NHMC may represent a toxification step, while the further dealkylation to carbazole is most likely a detoxication process.
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1485
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Dolovich J, Anderson M, Chodirker W, Drouin M, Hargreave FE, Hebert J, Knight A, O'Conner M, Small P, Yang W. Fluticasone propionate: a large multicentre trial. Respir Med 1990; 84 Suppl A:31-2. [PMID: 2287794 DOI: 10.1016/s0954-6111(08)80005-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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1486
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Yang W, Hendrickson WA, Crouch RJ, Satow Y. Structure of ribonuclease H phased at 2 A resolution by MAD analysis of the selenomethionyl protein. Science 1990; 249:1398-405. [PMID: 2169648 DOI: 10.1126/science.2169648] [Citation(s) in RCA: 374] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Ribonuclease H digests the RNA strand of duplex RNA.DNA hybrids into oligonucleotides. This activity is indispensable for retroviral infection and is involved in bacterial replication. The ribonuclease H from Escherichia coli is homologous with the retroviral proteins. The crystal structure of the E. coli enzyme reveals a distinctive alpha-beta tertiary fold. Analysis of the molecular model implicates a carboxyl triad in the catalytic mechanism and suggests a likely mode for the binding of RNA.DNA substrates. The structure was determined by the method of multiwavelength anomalous diffraction (MAD) with the use of synchrotron data from a crystal of the recombinant selenomethionyl protein.
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1487
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Yang W, Hendrickson WA, Kalman ET, Crouch RJ. Expression, purification, and crystallization of natural and selenomethionyl recombinant ribonuclease H from Escherichia coli. J Biol Chem 1990; 265:13553-9. [PMID: 2199440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Ribonuclease H (RNase H) from Escherichia coli is an endonuclease that specifically degrades the RNAs of RNA:DNA hybrids. The enzyme is a single polypeptide chain of 155 amino acid residues, of which 4 are methionines. To solve the crystallographic three-dimensional structure of E. coli RNase H by the multi-wavelength anomalous diffraction technique, we have constructed methionine auxotrophic strains of E. coli that overexpress selenomethionyl RNase H. MIC88 yields about 10 mg of selenomethionyl RNase H per liter of culture, which is comparable to the overexpression of the natural recombinant protein. We have purified both proteins to homogeneity and crystallized them isomorphously in the presence of sulfate. These are Type I crystals of space group P2(1)2(1)2(1) with the cell parameters a = 41.8 A, b = 86.4 A, c = 36.4 A, one monomer per asymmetric unit, and approximately 36% (v/v) solvent. Crystals of both proteins diffract to beyond 2-A Bragg spacings and are relatively durable in an x-ray beam. On replacement of sulfate with NaCl, crystals of natural RNase H grow as Type I' (very similar to Type I) at pH between 7.0 and 8.0; at pH 8.8, crystals of Type II are obtained in space group P2(1)2(1)2(1) with a = 44.3 A, b = 87.3 A, and c = 35.7 A. Type II crystals can be converted to Type I by soaking in phosphate buffer. RNase H crystals of Type II have also been reported by Kanaya et al. (Kanaya, S., Kohara, A., Miyakawa, M., Matsuzaki, T., Morikawa, K., and Ikehara, M. (1989) J. Biol. Chem. 264, 11546-11549).
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1488
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Liu Y, Yang W, Li S. Neodymium: YAG laser therapy in aphakic pupillary block glaucoma and aphakic malignant (ciliovitreal block) glaucoma. YAN KE XUE BAO = EYE SCIENCE 1990; 6:11-6. [PMID: 2101352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Aphakic pupillary block glaucoma and malignant glaucoma (ciliovitreal block) are severe complications of the intracapsular cataract extraction, presenting clinically as elevated intraocular pressure, persistent shallow anterior chamber and severe vitreal hernia. Six eyes (four women and two men) with aphakic pupillary block glaucoma and aphakic malignant glaucoma were resolved by Neodymium: YAG laser iridotomy and hyaloidotomy. The laser therapy resulted in immediate deepening of the anterior chamber and reducing of intraocular pressure. No side effect was observed. Neodymium: YAG laser iridotomy and hyaloidotomy may be more effective and simple than penetrating surgery in such cases.
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1489
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Bai Y, Yang W. [Nursing care of rheumatoid arthritis]. ZHONGHUA HU LI ZA ZHI = CHINESE JOURNAL OF NURSING 1990; 25:169-72. [PMID: 2350826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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1490
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Li M, Zhou J, Fan Y, Li W, Qin L, Yang W. [Analgesic and anti-inflammatory effects and toxicity of houjianxi]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1990; 15:235-8, 256. [PMID: 2206377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
It is effective for acute and chronic laryngopharyngitis clinically. Houjianxi can raise the pain thresholds during hot-plate test in mice, tail flick test in rats, and writhing test in mice with single dose ig 0.125 to 2.0 g/kg. Houjianxi can also inhibit the swelling of hind paw induced by sc 1% carrageenin 0.1 ml in rats as well as the increased vascular permeability induced by ip 0.7% HAC in mice. Toxic side effects were not observed for Houjianxi ig 48 g/kg x 3 within a day in mice and 1.8 g/kg daily for 90 d in rats.
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1491
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Zhou L, Yang W, Xu Y, Zhu Q, Ma Z, Zhu T, Ge X, Gao J. [Short-term curative effect of cultured Cordyceps sinensis (Berk.) Sacc. Mycelia in chronic hepatitis B]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1990; 15:53-5, 65. [PMID: 1693509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
33 cases of chronic hepatitis B. patients treated with cultured Cordyceps sinensis mycelia have shown that the drug improves the liver function, promotes negative transfer HBsAg, and markedly helps to raise plasma albumin, resist high gamma globulin and to adjust body immunocompetence. It is therefore suggested that cultured Cordyceps sinensis mycelia may be used as a medicine for chronic hepatitis B. patients in adjusting protein metabolism and correcting inversion of albumin and globulin.
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1492
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Lustbader JW, Birken S, Pileggi NF, Kolks MA, Pollak S, Cuff ME, Yang W, Hendrickson WA, Canfield RE. Crystallization and characterization of human chorionic gonadotropin in chemically deglycosylated and enzymatically desialylated states. Biochemistry 1989; 28:9239-43. [PMID: 2611225 DOI: 10.1021/bi00450a001] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Crystals suitable for X-ray diffraction studies at moderate resolution have been grown from two forms of human chorionic gonadotropin (hCG): HF-treated hCG and neuraminidase-treated hCG. The enzymatically desialylated form of hCG produced crystals that diffract to 2.8 A as compared to the HF-treated hCG crystals that diffract to 3.0 A. Although it was assumed that the high and heterogeneous carbohydrate content of the glycoprotein hormones inhibited their crystallization, this report suggests that it is the negatively charged surface sugars and neither the total carbohydrate content nor its heterogeneity which interferes with crystal formation. Chemical deglycosylation resulted in significantly increased protein degradation during crystal growth. Such peptide bond cleavages were observed to a much lesser extent in the crystals grown from neuraminidase-digested hCG. Sequence analysis of the HF-treated hCG crystals suggested that up to 45% of the molecules within the crystal had an acid-labile peptide bond cleaved. In contrast, the neuraminidase-treated hCG exhibited less than 9% of this type of cleavage. The increase in heterogeneity of the polypeptide chains within both crystals over that existent in the starting proteins was apparently due to changes occurring during crystal growth. The manner in which hCG was treated prior to crystallization was found to be a very important factor in the extent of peptide bond cleavages occurring during crystal growth. HF treatment of glycoproteins may render glycoproteins more susceptible to peptide bond cleavages during crystal growth.
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1493
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1494
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Yang W. Ab initio approach for many-electron systems without invoking orbitals: An integral formulation of density-functional theory. PHYSICAL REVIEW. A, GENERAL PHYSICS 1988; 38:5494-5503. [PMID: 9900286 DOI: 10.1103/physreva.38.5494] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1495
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Yang W. Thermal properties of many-electron systems: An integral formulation of density-functional theory. PHYSICAL REVIEW. A, GENERAL PHYSICS 1988; 38:5504-5511. [PMID: 9900287 DOI: 10.1103/physreva.38.5504] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1496
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Yang W. Dynamic linear response of many-electron systems: An integral formulation of density-functional theory. PHYSICAL REVIEW. A, GENERAL PHYSICS 1988; 38:5512-5519. [PMID: 9900288 DOI: 10.1103/physreva.38.5512] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1497
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Takeuchi Y, Yang W, Shih JC. Identification of 5-hydroxytryptamine1A receptor proteins in bovine frontal cortex. J Neurochem 1988; 51:1343-9. [PMID: 3171582 DOI: 10.1111/j.1471-4159.1988.tb01095.x] [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: 01/04/2023]
Abstract
5-Hydroxytryptamine1A (5-HT1A) receptor proteins were identified by a novel approach in which photoaffinity labeling technique was used in conjunction with affinity column chromatography. 5-HT1A receptors were solubilized from bovine frontal cortical membranes with 0.3% digitonin and 0.1% Nonidet P-40, and bound effectively to 1-[2-(4-aminophenyl)ethyl]-4-(3-trifluoromethylphenyl)piperazine (PAPP)-coupled Affi-Gel 10 in a time-dependent manner. PAPP was shown previously to be a selective ligand for the 5-HT1A receptor. Two protein bands with molecular masses of approximately 55,000 and 38,000 daltons revealed on sodium dodecyl sulfate-polyacrylamide gel electrophoresis were eluted from the affinity column with either 1 mM 5-HT or 1 microM [3H]1-[2-(4-azidophenyl)ethyl]-4-(3-trifluoromethyl-phenyl)piperazine ([3H]p-azido-PAPP). [3H]p-Azido-PAPP is a selective photoaffinity labeling probe for the 5-HT1A receptor. The intensity of these two protein bands and the incorporation of [3H]p-azido-PAPP into these two proteins decreased significantly when the solubilized fraction was preincubated with excess 5-HT or PAPP (saturating all 5-HT1A receptors) prior to affinity column chromatography. These results suggest strongly that these two proteins are related to the 5-HT1A receptor protein. The isoelectric points of the photolabeled 5-HT1A receptor proteins were 6.0 and 6.5.
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1498
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Anassontzis E, Katsanevas S, Kiritsis E, Kourkoumelis C, Markou A, Resvanis LK, Voulgaris G, Binkley M, Cox B, Enagonio J, Hojvat C, Judd D, Kephart RD, Malhotra PK, Mazur PO, Murphy CT, Turkot F, Wagner RL, Wagoner D, Yang W, Areti H, Conetti S, Lebrun P, Ryan DG, Ryan T, Schappert W, Stairs DG, Akerlof C, Cui X, Kraushaar P, Nitz D, Thun R, Wang L, He M, Zhang NJ. High-mass dimuon production in p-barN and pi -N interactions at 125 GeV/c. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1988; 38:1377-1403. [PMID: 9959285 DOI: 10.1103/physrevd.38.1377] [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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1499
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Zeng XP, Yang W, Wang ZG. [Relaxation effect of bovine parathyroid hormone 1-34 on rabbit aorta]. ZHONGGUO YAO LI XUE BAO = ACTA PHARMACOLOGICA SINICA 1988; 9:330-3. [PMID: 3195343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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1500
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Katsanevas S, Kourkoumelis C, Markou A, Resvanis LK, Tzamarias S, Voulgaris G, Binkley M, Cox B, Enagonio J, Hojvat C, Judd D, Kephart RD, Malhotra PK, Mazur PO, Murphy CT, Turkot F, Wagner RL, Wagoner DE, Yang W, Areti H, Conetti S, Lebrun P, Ryan D, Ryan T, Schappert W, Stairs DG, Akerlof C, Kraushaar P, Nitz D, Thun R, Mao H. Nuclear-target effects in J/ psi production in 125-GeV/c antiproton and pi - interactions. PHYSICAL REVIEW LETTERS 1988; 60:2121-2124. [PMID: 10038265 DOI: 10.1103/physrevlett.60.2121] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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