1001
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Xu G, Dai J, Yang S, Zhang F, Zhang H. Dynamical behavior in a hybrid optical system with competing interactions. Phys Rev A 1990; 42:4269-4283. [PMID: 9904526 DOI: 10.1103/physreva.42.4269] [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: 05/22/2023]
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1002
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Zhou Y, Ma Z, Li Y, Pan L, Xu G, Xu L, Yu G, Li P. [Investigation on resources of the Chinese drug beimu in Gansu Province]. Zhongguo Zhong Yao Za Zhi 1990; 15:515-6, 575. [PMID: 2092708] [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: 12/30/2022]
Abstract
Based on a resources investigation and taxonomic research on the medicinal plants of Fritillaria from Gansu Province. Nine species one variety and one cultivation variety have been reported. Records and distribution of the species, together with a key for the species and a key for the powdered drug have been furnished as well.
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Affiliation(s)
- Y Zhou
- China Pharmaceutical University, Nanjing
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1003
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Du Y, Xu G, Zhong L, Liu X. [Various methods for purification of urine Tamm-Horsfall protein]. Hua Xi Yi Ke Da Xue Xue Bao 1990; 21:267-70. [PMID: 2093062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The measurements of serum, urine Tamm-Horsfall protein (THP) and its antibody are essential to the early diagnosis of tubulointerstitial diseases and acute rejection after renal transplantation. The purification of THP proves to be the key procedure for the production of diagnostic kit. Once, twice and three times salt precipitation with 0.58 mol/L NaCl and chromatography with Sephadax G-200 were adopted to purify urine THP. Enzyme immunoassay was used to detect the antigenicity of the products, SDS-PAGE to determine the molecular weight (MW) and the electrophoretic purity (EP), Beckman DU-7 model spectrophotometer to scan the ultraviolet absorption spectrum. Evaluation of the four methods was based on the purity and the antigenicity of the produced THP, the output, the complexity of procedure, and the cost of required materials. Results show that the MW of THP is 93.0 kd; the ultraviolet absorption maximum is at lambda = 278 nm; the outputs are 7.5, 5.5, 3.8, and 0.4 mg/L; the concentrations of THP with antigenicity are 65%, 75%, 98% and 100%, respectively, and the EPs of three times salt precipitation and chromatography are better. It is concluded that three times salt precipitation should be recommended because of its excellence in purity and antigenicity of the produced THP, the simplicity of manipulation, and the cheapness of the materials needed.
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1004
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Viskochil D, Buchberg AM, Xu G, Cawthon RM, Stevens J, Wolff RK, Culver M, Carey JC, Copeland NG, Jenkins NA. Deletions and a translocation interrupt a cloned gene at the neurofibromatosis type 1 locus. Cell 1990; 62:187-92. [PMID: 1694727 DOI: 10.1016/0092-8674(90)90252-a] [Citation(s) in RCA: 838] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Three new neurofibromatosis type 1 (NF1) mutations have been detected and characterized. Pulsed-field gel and Southern blot analyses reveal the mutations to be deletions of 190, 40, and 11 kb of DNA. The 11 kb deletion does not contain any of the previously characterized genes that lie between two NF1 translocation breakpoints, but it does include a portion of a rodent/human conserved DNA sequence previously shown to span one of the translocation breakpoints. By screening cDNA libraries with the conserved sequence, we identified a number of cDNA clones from the translocation breakpoint region (TBR), one of which hybridizes to an approximately 11 kb mRNA. The TBR gene crosses at least one of the chromosome 17 translocation breakpoints found in NF1 patients. Furthermore, the newly characterized NF1 deletions remove internal exons of the TBR gene. Although these mutations might act by compromising regulatory elements affecting some other gene, these findings strongly suggest that the TBR gene is the NF1 gene.
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Affiliation(s)
- D Viskochil
- Department of Pediatrics, University of Utah, Salt Lake City 84132
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1005
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Yan Z, Niu Z, Pan N, Xu G, Yang X. [Analysis of essential oils in roots and fruits of Angelica in Northeast China]. Zhongguo Zhong Yao Za Zhi 1990; 15:419-21, 447. [PMID: 2261074] [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: 12/31/2022]
Abstract
The essential oils of roots and fruits of five species of Angelica have been examined and analysed by GC-MS-DS; 59 chemical compounds are reported, of which alpha-pinene, myrcene and p-cymene are common to all five species. This paper provides a scientific basis for developing the resources of this genus in the Northeast.
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Affiliation(s)
- Z Yan
- Jilin Academy of Traditional Chinese Medicine and Materia Medica, Changchan
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1006
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Xu G. [Studies on blood galactokinase of patients with presenile and senile cataracts]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1990; 12:101-4. [PMID: 2143108] [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: 12/30/2022]
Abstract
Whole blood galactokinase (GK) activities were determined in 278 individuals including 77 patients with senile cataracts, 60 with presenile cataracts and 141 normal controls. No significant difference was found among the GK levels of the three groups. The frequency of GK heterozygocity in the presenile cataract group, however, was significantly higher than that in the normal control group (P less than 0.01), suggesting that even a partial decrease in GK activity might facilitate cataract formation in relatively early stages of life. The intake of milk and its products should be limited, both in GK homo- and heterozygotes.
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1007
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1008
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Guo Y, Cheng R, Xu G, Zheng Q. [Chemical constituents of Isodon parvifolia (Batalin) Hara]. Zhongguo Zhong Yao Za Zhi 1990; 15:101-3, 127. [PMID: 2390167] [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: 12/31/2022]
Abstract
Twelve compounds were isolated from the leaves and stems of Isodon parvifolia. This paper deals with the isolation and identification of two diterpenes epinodosinol (I), lasiodonin (II) and two triterpenes alpha-amyrin (XI a) and beta-amyrin (XI b).
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Affiliation(s)
- Y Guo
- Nanjing Institute of Materia Medica
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1009
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Wang Q, Xu G, Jiang Y. [Analgesic and sedative effects of the Chinese drug rhizoma Paridis]. Zhongguo Zhong Yao Za Zhi 1990; 15:109-11, 128. [PMID: 2390171] [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: 12/31/2022]
Abstract
The analgesic and sedative actions of Chinese drug Rhizoma Paridis are reported. All of the 6 experimented species and varieties in common use are obviously effective. Among them Paris polyphylla var. chinensis, P. polyphylla var. yunnanensis are stronger in analgesic action. Sedative action of P. fargesii, P. polyphylla var. chinensis, P. thibetica is also strong. In addition, pariphyllin A and gracillin were also used in the experiment.
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Affiliation(s)
- Q Wang
- China Pharmaceutical University, Naujing
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1010
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1011
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Xu G. [A primary study on the history of ancient West-Asia and Egypt's pharmacy] (Chi). Zhonghua Yi Shi Za Zhi 1989; 19:111-5. [PMID: 11622621] [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: 04/17/2023]
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1012
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Xu G, Dai JH, Zhang HJ. Transition to chaos from quasiperiodicity in optical bistability with competing interactions. Phys Rev A Gen Phys 1989; 39:3508-3510. [PMID: 9901653 DOI: 10.1103/physreva.39.3508] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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1013
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Shi H, Xu G, Shen Z. A retrospective study of oral mucosal diseases in three age groups. Gerodontics 1988; 4:235-7. [PMID: 3271719] [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: 01/05/2023]
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1014
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Tang P, Xu G, Chen XH, Wang YP, Zhang WG, Yuan SL. [Studies of the effect of nickel and nickel compounds on transformation on Syrian hamster embryo cells]. Hua Xi Yi Ke Da Xue Xue Bao 1988; 19:150-3. [PMID: 3198095] [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]
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1015
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Xu G, Tang P, Wang YP, Chen XH, Zhang WG, Li GG. [Carcinogenic effects on Syrian hamster embryo cells exposed to He-Ne laser in vitro]. Hua Xi Yi Ke Da Xue Xue Bao 1987; 18:238-40. [PMID: 3679175] [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]
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1016
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Tong ZH, Zhu G, Yan LX, Zhu J, Feng YG, Xu G. Association of HLA with Graves' disease in Chinese. Chin Med J (Engl) 1987; 100:296-8. [PMID: 3115694] [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: 01/04/2023] Open
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1017
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Xu G, Tsuji S, Asada M. A Motion Stereo Method Based on Coarse-to-Fine Control Strategy. IEEE Trans Pattern Anal Mach Intell 1987; 9:332-336. [PMID: 21869404 DOI: 10.1109/tpami.1987.4767908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This correspondence presents a motion stereo method based on coarse-to-fine control strategy. A camera sliding straight takes images that form a set of stereo pairs. The matching proceeds from the shortest baseline pair to the longest baseline pair, using the disparity map already obtained to guide in searching for the next pair.
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Affiliation(s)
- G Xu
- Department of Control Engineering, Osaka University, Toyonaka, Osaka 560, Japan
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1018
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Thompson DC, Weinberger E, Xu G, Stoicheff BP. Frequency shifts and line broadenings in collisions between Rydberg and ground-state alkali-metal atoms. Phys Rev A Gen Phys 1987; 35:690-700. [PMID: 9898192 DOI: 10.1103/physreva.35.690] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1019
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Bai SH, Xu G, Tang P, Chen XH. [A study of antineoplastic activity of DHAQ on human adenocarcinoma cells of lung hepatoma and gastric cancer cells in vitro]. Hua Xi Yi Ke Da Xue Xue Bao 1986; 17:284-6. [PMID: 3032765] [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: 01/03/2023]
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1020
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Tang P, Xu G, Chen XH. [Study on the routine method of a short-term transforming test in mammalian cells in vitro for detecting carcinogens and promotors]. Hua Xi Yi Ke Da Xue Xue Bao 1986; 17:185-9. [PMID: 3104196] [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]
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1021
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1022
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Xu G, Hu WY, Puga MW, Tong SY, Yeh JL, Wang SR, Lee BW. Atomic geometry of the 2 x 2 GaP(111) surface. Phys Rev B Condens Matter 1985; 32:8473-8476. [PMID: 9937055 DOI: 10.1103/physrevb.32.8473] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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1023
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Xu G, Bai SH, Chen XH, Tang P, Li GG. [The injury effect of hematoporphyrin disodium salt of the pig and He-Ne laser to human cells in vitro]. Sichuan Yi Xue Yuan Xue Bao 1985; 16:310-13. [PMID: 3837389] [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: 01/07/2023]
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1024
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Goldschmidt YY, Xu G. Phase diagrams of the random-field Potts model in three dimensions. Phys Rev B Condens Matter 1985; 32:1876-1879. [PMID: 9937247 DOI: 10.1103/physrevb.32.1876] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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1025
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Xu G, Bai SH, Tang P, Chen XH, Li GG. [Successful induction of transformation of NIH/3T3 cells in vitro by low energy level He-Ne laser]. Sichuan Yi Xue Yuan Xue Bao 1985; 16:19-23. [PMID: 4012585] [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: 01/08/2023]
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1026
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Bostock E, Dingledine R, Xu G, Chang KJ. Mu opioid receptors participate in the excitatory effect of opiates in the hippocampal slice. J Pharmacol Exp Ther 1984; 231:512-7. [PMID: 6094789] [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: 01/18/2023] Open
Abstract
The effects of the opioid peptides morphiceptin and [N-MePhe3-D-Pro4]morphiceptin (PL017), both mu receptor agonists, were examined by electrophysiological techniques in the rat hippocampal slice and ligand binding techniques in hippocampal membrane preparations. The electrophysiological actions of the mu agonists were similar to those of the previously studied delta receptor agonist [D-Ala2, D-Leu5]enkephalin. Thus, for a given size field excitatory postsynaptic potential the amplitude of both population spike and intracellular excitatory postsynaptic potential was increased by morphiceptin. These effects were concentration dependent and reversed by naloxone. The EC50 for morphiceptin was 1.6 microM, which is consistent with the mu-selective binding properties of this peptide. Similar results were obtained with the more potent analog PL017. Morphiceptin and morphine had similar displacement profiles in competition experiments performed with hippocampal membranes and a variety of radioligands. In Tris buffer morphiceptin potently inhibited the binding of the mu receptor marker [125I]FK 33,824 but displayed the expected shallow displacement isotherm against binding of the delta receptor marker [125I][D-Ala2, D-Leu5]enkephalin. A significant interaction of either morphiceptin or morphine with kappa binding sites is improbable since neither agonist could fully displace binding of [3H]ethylketocyclazocine or [3H]diprenorphine. The potency of morphiceptin in displacing [3H]naloxone from mu binding sites was reduced by inclusion of 100 mM NaCl or 100 microM GTP in the assay. The dissociation constant of morphiceptin for mu binding sites in physiological saline was 0.78 microM, comparable to its EC50 determined in electrophysiological experiments. It appears, therefore, that the electrophysiological properties of opioid peptides in the hippocampal slice may be mediated by both mu and delta receptors.(ABSTRACT TRUNCATED AT 250 WORDS)
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1027
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Abstract
In this article two cases, each involving an inflamed lateral canal, are reported. The lateral canals were fully filled with Oxpara paste by slight overfilling. The management principles of lateral and accessory canals are briefly mentioned as well.
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1028
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Abstract
The chemical potential of a protein is a time-averaged quantity whose value depends upon the fractions of time spent in the different conformations and therefore upon the protein dynamics. If the monomer involved in an association equilibrium undergoes unfolding limited by its lifetime, its chemical potential as well as that of the associated form will not be constant and the free energy of association will be a diminishing function of the degree of dissociation. For a unique free energy of association, the logarithm of the protein concentration must change by 2.86 units to increase the degree of dissociation from 0.1 to 0.9. The dissociation of enolase appears to take place over a significantly smaller range (1.7 units), and dansyl conjugates of enolase show an even narrower range (0.9 unit). A simple descriptive theory is developed, and this shows that the values observed are explained by a difference in free energy of 1-3 kcal/mol (1 cal = 4.18 J) between the conformations present at negligible and almost complete dissociation.
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1029
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Xu G, Zou C. NAD+ analogs in formation of new fluorophores on ultraviolet irradiation with D-glyceraldehyde-3-phosphate dehydrogenase. Sci Sin B 1982; 25:152-9. [PMID: 7100895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A number of NAD+ analogs have been tested in their ability to form fluorescent derivatives when UV irradiated with the active site Cys-149 carboxymethylated GAPDH and this has been compared with their properties of acting as hydrogen acceptors and forming the Racker band. Among the analogs tested, NHD+, NGD+, APAD+ and epsilon NAD+ give positive results in all the above-mentioned reactions whereas alpha NAD+, NMN+ and CPAD+ are all negative. FPAD+ forms a fluorescent derivative on UV irradiation with the carboxymethylated enzyme but is inactive as a hydrogen acceptor and does not form the Racker band. This is probably due to thiohemiacetal formation of the pyridine 3-aldehyde of this derivative with the active site SH group required for both the latter 2 reactions. TPAD+, although active active as a hydrogen acceptor, does not form either a fluorescent derivative or a Racker band. The fact that for the great majority of the analogs, the property of forming fluorescent derivatives is in parallel with their hydrogen acceptor activity seems to show that the formation of the fluorescent derivative is indeed at the active site, and hence can be used as an intrinsic probe for the study of the conformation of the active site of this enzyme.
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1030
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Xu G. [Clinical observation of ultrasonic (sector scanning) diagnosis of anencephalus (author's transl)]. Zhonghua Fu Chan Ke Za Zhi 1981; 16:211-3. [PMID: 7343205] [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: 01/24/2023]
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1031
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Yang HG, Xu ZY, Li CX, Zhang AD, Xu G, Li YY. The abnormal scattering of light in an α-lithium iodate single crystal under the action of a DC field. Acta Crystallogr A 1981. [DOI: 10.1107/s010876738109510x] [Citation(s) in RCA: 0] [Impact Index Per Article: 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
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