3326
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Xu Y. [Effect of ocular hypertension on the optic nerve and the lamina cribrosa in cats]. [ZHONGHUA YAN KE ZA ZHI] CHINESE JOURNAL OF OPHTHALMOLOGY 1988; 24:286-8. [PMID: 3148427] [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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3327
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Moodenbaugh AR, Xu Y, Suenaga M, Folkerts TJ, Shelton RN. Superconducting properties of La2-xBax. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:4596-4600. [PMID: 9946848 DOI: 10.1103/physrevb.38.4596] [Citation(s) in RCA: 206] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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3328
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Heald SM, Tranquada JM, Moodenbaugh AR, Xu Y. Orientation-dependent x-ray-absorption near-edge studies of high-Tc superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:761-764. [PMID: 9945248 DOI: 10.1103/physrevb.38.761] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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3329
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Lu ZW, Xu Y, Ren Y, Zhang YZ. [Serum free amino acids in chronic cor pulmonale]. ZHONGHUA NEI KE ZA ZHI 1988; 27:337-8, 388. [PMID: 3197502] [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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3330
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Jin XM, Miao J, Xu Y, Deng GR. [Amplification and rearrangement of proto-oncogene c-abl in human leukemia cells]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 1988; 10:167-70. [PMID: 3219975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
DNA of peripheral blood or bone marrow leukocytes from 8 normal subjects, 7 cases of acute lymphocytic leukemia (ALL), 2 of acute myelogenous leukemia (AML) and 1 of chronic myelogenous leukemia (CML), having been digested by endonuclease Eco RI or Pst I separately, was hybridized with the probes of 3' fragment (Pst I/Hind III) or 5' fragment (Hinc II/Pst I) of Abelson murine leukemia virus (A-MuLV) oncogene v-abl. The proto-oncogene c-abl, which is homologous to v-abl, was found amplified in 4 ALL, 1 CML and 1 AML. In one of these 4 ALL, c-abl was amplified even over 100 times. A new c-abl BamH I fragment with 6.7 kilobase pairs (kb) in length was observed in 2 ALL and 1 CML out of these 6 cases with amplification, but none of this fragment was found in the normal subjects or other leukemia patients. These 3 patients with the presence of 6.7 kb fragment were high risk ones and 2 of them had died, suggesting that 6.7 kb fragment be the index of poor prognosis. The amplification and rearrangement of c-abl imply the activation of proto-oncogene in leukemogenesis.
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3331
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Sedgwick J, Nelson P, Jordan C, Abbey L, Xu Y, Moran T. Resonant and near-resonant charge transfer reactions of gaseous organic ions. Chem Phys Lett 1988. [DOI: 10.1016/0009-2614(88)85058-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3332
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Xu Y. Recommending an improved method for monitoring and estimating fugitive emissions. ENVIRONMENTAL MONITORING AND ASSESSMENT 1988; 10:25-35. [PMID: 24248524 DOI: 10.1007/bf00394253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This paper presents a description of an improved method for monitoring and estimating fugitive emissions, the main features of which are (1) the adoption of a multi-curve layout of monitoring points and (2) the application of a Pasquill-Gifford (PG) model modified with a term of correction, exp (Bx), obtained through curvilinear regression of the data collected. Compared to other known methods dealing with fugitive emissions, this method is characterized by its greater proficiency in correcting the deviations in the estimation resulting from the roughness of the ground surface of a site being investigated and from other physical, chemical, and atmospheric factors. The estimated values arrived at are of greater accuracy and reliability. The author suggests that this method can be widely applied in the selection of sites and the determination of protective (buffer) zones for factories giving off fugitive emission.
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3333
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Ito S, Syundo J, Tsuji Y, Shimizu I, Kishi S, Tamura Y, Ii K, Xu Y. Cytochemical demonstration of guanase in human liver using yellow tetrazolium. Acta Histochem 1988; 83:99-105. [PMID: 3132023 DOI: 10.1016/s0065-1281(88)80078-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Histochemical studies of human guanase (guanine deaminase) have seldom been undertaken, in part because of technical difficulties which result in heavy background staining. We reported a modified procedure for histochemical demonstration of guanase in human tissues involving hydrolytic deamination of the substrate guanine to xanthine via guanase, and then oxidation of xanthine to uric acid, with concomitant reduction of nitrotetrazolium blue (NBT). In this report, we describe a modification of this method for cytochemical demonstration of guanase at the fine structural level using yellow tetrazolium in place of NBT for determination of the intracellular distribution of guanase in human hepatocytes. In the hepatocytes, the reaction products were seen to be concentrated in the nucleus, in mitochondria, cisternae of the smooth and/or rough-surfaced endoplasmic reticulum, and lysosomes. The precise locations of the reaction product in the cisternae of the nuclear envelope, chromosomes, and nucleus could not be determined. However, the reaction products in the mitochondria were clearly seen to be located in the spaces of cristae. This information of the intracellular distribution of guanase in normal hepatocytes will be useful in determining the physiological role of this enzyme and in further studies on diseased hepatocytes including those in non-A non-B hepatitis.
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3334
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Xu Y. [Effect of ocular hypertension on the retinal vessels and tissues in the cat]. [ZHONGHUA YAN KE ZA ZHI] CHINESE JOURNAL OF OPHTHALMOLOGY 1988; 24:37-40. [PMID: 3142749] [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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3335
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Zhao GL, Xu Y, Ching WY, Wong KW. Theoretical calculation of optical properties of Y-Ba-Cu-O superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 36:7203-7206. [PMID: 9942465 DOI: 10.1103/physrevb.36.7203] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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3336
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Xu Y, Tong JS, Qi AP, Zhong CQ, Qian SZ. [The effect of combined use of gossypol and tripterygium wilfordii on the fertility of male rats]. YAO XUE XUE BAO = ACTA PHARMACEUTICA SINICA 1987; 22:818-21. [PMID: 3452960] [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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3337
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Satter RL, Xu Y, Depass A. Effects of Temperature on H Secretion and Uptake by Excised Flexor Cells during Dark-Induced Closure of Samanea Leaflets. PLANT PHYSIOLOGY 1987; 85:850-5. [PMID: 16665789 PMCID: PMC1054351 DOI: 10.1104/pp.85.3.850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Previous studies reveal that dark-induced closure of Samanea leaflets is accompanied by H(+) secretion from flexor motor cells. We now report that flexor tissue excised in the light, incubated in a weakly buffered bathing solution, and then darkened at different temperatures (18 degrees C-30 degrees C) acidified the medium (indicating net H(+) efflux) at all temperatures tested, but most rapidly at the highest temperature. However, pH changes reversed direction after 20 to 70 minutes; the lower the temperature, the later pH reversal occurred, and the lower the pH at reversal and after 45 minutes. These data provide a basis for the previously reported promotive effect of low temperature on dark-induced leaflet closure, assuming net H(+) and K(+) fluxes are opposite in direction. Net H(+) efflux at all temperatures tested was greater when the impermeant molecule iminodiacetate replaced small permeant anions in the bathing solution, suggesting that H(+) uptake is coupled to anion uptake, probably via a H(+)/anion symport system. When permeant anions were deficient, the amount of malate in the tissue increased, presumably by new synthesis. Malate synthesis would substitute for H(+)/anion uptake in charge balance and in providing H(+) for cytoplasmic pH regulation.
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3338
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Xu Y, Hu X, Zhang JB, Liu YH, Zhang QY, Yuan J, Xue SP. [PAGE electrophoresis of hemoglobin from reticulocytes of myeloma cell hybrids]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1987; 9:346-50. [PMID: 2968858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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3339
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Ching WY, Xu Y, Zhao GL, Wong KW, Zandiehnadem F. Electronic structure and excitonic-enhanced superconducting mechanism in YBa2Cu. PHYSICAL REVIEW LETTERS 1987; 59:1333-1336. [PMID: 10035205 DOI: 10.1103/physrevlett.59.1333] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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3340
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Nie S, Li D, Pu Z, Xu Y. The flux growth and crystallographic investigation of a new compound, Pb 3Bi 0.1Nb 2O 8.15, in the PbO–Bi 2O 3–Nb 2O 5system. Acta Crystallogr A 1987. [DOI: 10.1107/s0108767387079297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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3341
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Xu YL, Xue JL, Qiu XF, Qi M, Xu Y. Regional assignment of human alcohol dehydrogenase (ADH) gene to 4pter----4q21. SCIENTIA SINICA. SERIES B, CHEMICAL, BIOLOGICAL, AGRICULTURAL, MEDICAL & EARTH SCIENCES 1987; 30:720-6. [PMID: 3445134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The hybrid clone FD1 constructed by fusion of Chinese hamster cell line Wg3-h with human lymphocyte was irradiated with X-ray. Fourteen survival clones were isolated and 3 of them, F5B, F52B, F61A were analyzed in detail by cytogenetic and biochemical methods. The results of chromosome G-banding followed by Giemsa-11 differential staining show that there exists a deleted human chromosome 4 in all of the three hybrids. This deletion of human chromosome 4 in F61A is 4pter----4q21. The results of isozyme analysis of phosphoglucomutase-2 (PGM2) which is located on 4p14----4q21 confirm our cytogenetic conclusion. We used polyacrylamide gel electrophoresis to study the alcohol dehydrogenase (ADH) in human lymphocyte, Wg3-h and hybrid clones. Their electrophoretic pattern showed that human ADH isozyme did express, in the peripheral blood lymphocyte, hybrids F5B, F52B, F61A and FD1. According to these results, we suggest that one of the Class I ADH structural genes is located on the human chromosome 4pter----4q21. Recently, McKusick reported that Class I ADH gene cluster had been assigned to chromosome 4q21----4qter. Considering this fact, we suggest that Class I ADH gene might be assigned to chromosome 4q21 or on its vicinity.
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3342
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Xu Y, Qiu XF, Xue JL, Zhou JM, Xu YL. Establishment of a human/Chinese hamster hybrid clone panel. SCIENTIA SINICA. SERIES B, CHEMICAL, BIOLOGICAL, AGRICULTURAL, MEDICAL & EARTH SCIENCES 1987; 30:630-7. [PMID: 3313724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Combined with the chromosome G-banding, followed by Giemsa-11 techniques and chromosomal marker isozyme analysis, 6 out of 200 subclones have been analyzed in detail. A primary hybrid clone panel has been established, which can be used to map genes on chromosomes 4, 5, 8, 12, 20 and 22. Since the panel contains deleted chromosomes 4, 5, 8 and 12, genes on these chromosomes can be mapped regionally.
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3343
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Abstract
A new alkaloid, N-allylnorgalanthamine ( 1), was isolated from the bulbs of LYCORIS GUANGXIENSIS Y. Hsu et Q. J. Fan (Amaryllidaceae). Additionally, seven known alkaloids, lycorine, narwedine, galanthamine, lycoramine, crinine, norgalanthamine, and pseudolycorine were also obtained. The structure of 1 was established through the interpretation of spectral data.
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3344
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Xu Y, Salerno JC, Wei YH, King TE. Stabilized ubisemiquinone in reconstituted succinate ubiquinone reductase. Biochem Biophys Res Commun 1987; 144:315-22. [PMID: 3034247 DOI: 10.1016/s0006-291x(87)80512-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
QP-S, a ubiquinone (Q) protein, accepts electrons from succinate through succinate dehydrogenase (SDH). A new method has produced a preparation of QP-S which has a different amino acid composition and SDS gel electrophoretic pattern from that of the old preparation (Biochemistry 19, 3579-3585 (1980)). The new preparation contains less than 1 nmol heme/mg protein; the activity of the preparation was not proportional to its heme content. A thenoyltrifluoroacetone sensitive free radical signal was detected by EPR spectroscopy in succinate-Q reductase reconstituted from this QP-S and SDH; the characteristics of this species identify it as ubisemiquinone. At pH 7.4, the Em of the two electron step was about 70 mV with E1 = 5 mV and E2 = 125 mV. The properties of the radical differed slightly from those of "Qs" radical in more intact preparations (e.g. submitochondrial particles). The present is the simplest system in which such a succinate reducible ubisemiquinone free radical has been demonstrated.
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3345
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Zhang XG, Xu Y, Qian SZ. Injection of copper powder into epididymides via vas deferens on male fertility. ADVANCES IN CONTRACEPTIVE DELIVERY SYSTEMS : CDS 1987; 3:167-71. [PMID: 12268654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
In adult SD rats, a single injection of silicon rubber containing 10mg metallic copper particles via vas deferens into each cauda epididymis could induce male infertility. Although the copper contact in the cauda epididymides of treated rats was significantly higher than that in the controls, the serum copper concentration did not rise significantly, while the histology of important organs and blood testosterone levels did not change. Treated animals gained weight as fast as the controls, suggesting a low systemic toxicity of this procedure. In 5 of the 8 treated rats, fertility was restored 16 weeks after treatment with normal testicular copper concentration and testicular histology. In 3, fertility was not restored within 16 weeks and the testicular copper concentration was significantly higher than in the controls. Only in these 3 rats were different degrees of damage noted in the seminiferous epithelium and it is anticipated that the fertility will be restored after a certain period of time since sperm production was unaffected. The delayed recovery of fertility in these rats is attributed to the diffusion of copper ions into the testis. It would appear that the injection of silicon rubber containing copper particles via the vas deferens to the cauda epididymides is a potential approach for male contraception.
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3346
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Liu YH, Tian JS, Xu Y, Xue SP. [Establishment of human promyelocytic leukemia cell mutant (HL-60-AR) with characteristics of resistance to 8-AG and deficiency in HGPRT]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1986; 8:456-60. [PMID: 2954674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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3347
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Xue SP, Zhang JB, Yuan J, Xu Y, Cai YY, Wang ZQ, Liu YH, Li LJ, Hu X. [Studies on the regulatory effect of rabbit reticulocyte cytoplasmic factors on the malignancy of mouse myeloma cells]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1986; 8:339-46. [PMID: 2952304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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3348
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Lee P, Lieber AJ, Pradhan AK, Xu Y. Time-resolved measurements of nonthermal x-ray emission of Ti. PHYSICAL REVIEW. A, GENERAL PHYSICS 1986; 34:3210-3216. [PMID: 9897639 DOI: 10.1103/physreva.34.3210] [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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3349
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Xu Y, Zhang SF, Hu X, Xue SP. [Analysis of the effect of gossypol on the activity of purified LDH-X]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1986; 8:362-5. [PMID: 2952308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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3350
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Kage M, Kage M, Liew CT, Xu Y, Peters RL. Alpha-1-antitrypsin deficiency in adults. ACTA PATHOLOGICA JAPONICA 1986; 36:1139-48. [PMID: 3490736 DOI: 10.1111/j.1440-1827.1986.tb02835.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A clinicopathological examination was carried out on eight adult patients with alpha-1-antitrypsin (ATT) deficiency. Phenotyping confirmed five patients with PiMZ, two patients with PiZ-, and one patient with PiZZ. Cirrhosis was found in six of the patients, four of whom had a history of excessive ethanol consumption. Hepatitis B surface antigen was positive in two patients with cirrhosis. Dysplastic change was present in four patients, although no neoplasia in the liver was found in all patients. All patients had periodic acid-Schiff positive and diastase resistant inclusions of hepatocytes, which were identified as ATT by indirect immunoperoxidase stain. The possibility of the combined effects of ATT inclusions and such harmful stimuli such as alcohol or viral hepatitis infection may render the hepatocytes more susceptible to damage, and may contribute to development of cirrhosis.
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