3251
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Zhao CY, Yang Y, Li H, Zheng XL, Yang FH, Li Q. [Study on the inhibition of solid form of S-180 through water soluble polysaccharides from Flammulina velutipes]. Hua Xi Yi Ke Da Xue Xue Bao 1988; 19:146-9. [PMID: 3198094] [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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3252
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Li Q, Soukoulis CM, Economou EN. Universal behavior near the band edges for disordered systems: Numerical and coherent-potential-approximation studies. Phys Rev B Condens Matter 1988; 37:8289-8297. [PMID: 9944165 DOI: 10.1103/physrevb.37.8289] [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: 04/11/2023]
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3253
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Ko CM, Li Q. Relativistic Vlasov-Uehling-Uhlenbeck model for heavy-ion collisions. Phys Rev C Nucl Phys 1988; 37:2270-2273. [PMID: 9954707 DOI: 10.1103/physrevc.37.2270] [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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3254
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Li Q. [Immunological approach to vernal keratoconjunctivitis]. Zhonghua Yan Ke Za Zhi 1988; 24:94-7. [PMID: 3143535] [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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3255
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Li Q, Pnevmatikos S, Economou EN, Soukoulis CM. Lattice-soliton scattering in nonlinear atomic chains. Phys Rev B Condens Matter 1988; 37:3534-3541. [PMID: 9944950 DOI: 10.1103/physrevb.37.3534] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [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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3256
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Abstract
The lack of detectable variable fluorescence from guard cell chloroplasts in both the albino and green portions of variegated leaves of St. Augustine grass (Stenotaphrum secundatum var variegatum A.S. Hitchc.) is reported. Fluorescence was measured either with a highly sensitive, modified fluorescence microscope which was capable of recording fluorescence induction curves from single chloroplasts, or with a spectrofluorometer. Both fast and slow fluorescence transients from S. secundatum guard cells showed a rapid rise and then remained at a steady level. Neither variable fluorescence increase (induction) nor decrease (quenching), properties normally associated with photosystem II, was observed from these chloroplasts. These fluorescence kinetics did not change either with alterations of the specimen preparation procedure or with alterations of the excitation light intensities and wavelengths. These results indicate that guard cell chloroplasts in this variety of S. secundatum do not conduct normal photosystem II electron transport. Light regulation of stomatal conductance in intact leaves of this plant did occur, however, and was similar to light regulation observed in other species. The conductance of the green portion of the leaves was much greater in the light than in the dark, and was much greater than the conductance of the albino portion of the leaves. Stomata in the green portion of the leaves also showed greater opening in blue light than in red light. These results provide evidence that stomatal regulation in this variety of S. secundatum does not rely on photosystem II electron transport in guard cell chloroplasts.
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Affiliation(s)
- Q Li
- Department of Botany and Plant Sciences, University of California, Riverside, California 92521
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3257
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3258
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3259
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Li Q, Altschuld RA, Stokes BT. Quantitation of intracellular free calcium in single adult cardiomyocytes by fura-2 fluorescence microscopy: calibration of fura-2 ratios. Biochem Biophys Res Commun 1987; 147:120-6. [PMID: 3115258 DOI: 10.1016/s0006-291x(87)80095-5] [Citation(s) in RCA: 89] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Isolated rat myocytes incubated with the acetoxy methyl ester of fura 2 contained partially hydrolyzed esters, necessitating in vivo calibration of the signals obtained by fluorescence microscopy for calculation of pCa. Ionophores did not produce reliable R'max and R'min values in respiring myocytes, and elevated free calcium caused individual cells to hypercontract and burst. These difficulties were overcome by superfusion with a glucose-free buffer containing an inhibitor and an uncoupler of oxidative phosphorylation. R'max and R'min values obtained by ionophore treatment of deenergized myocytes were normalized to an in vitro calibration curve. Resting pCa derived from the individual curves averaged 6.9 for calcium-tolerant rod-shaped myocytes.
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3260
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Lynn JW, Li WH, Li Q, Ku HC, Yang HD, Shelton RN. Magnetic fluctuations and two-dimensional ordering in ErBa2Cu. Phys Rev B Condens Matter 1987; 36:2374-2377. [PMID: 9943106 DOI: 10.1103/physrevb.36.2374] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.2] [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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3261
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Cao ZA, Li Q, Shi Y, Zhong LC. [Kinetics of delta'-dehydrogenation of hydrocortisone by Arthrobacter simplex By-2-13. II. Kinetics of delta'-dehydrogenation of hydrocortisone by immobilized A. simplex By-2-13]. Wei Sheng Wu Xue Bao 1987; 27:151-5. [PMID: 3630142] [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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3262
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Li Q, Lynn JW, Gotaas JA. Absolute measurement of the ordered magnetic moment in holmium-rich (Er1-xHox)Rh4B4. Phys Rev B Condens Matter 1987; 35:5008-5012. [PMID: 9940682 DOI: 10.1103/physrevb.35.5008] [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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3263
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Abstract
Of a total of 528,729 workers exposed to benzene or benzene mixtures in China, 508,818 (96.23%) were examined. Altogether 2,676 cases of benzene poisoning were found, a prevalence of 0.15%. A higher prevalence of benzene poisoning was found in the cities of Hangjou, Hefei, Nanjing, Shenyang, and Xian. The geometric mean concentration of benzene in 50,255 workplaces was 18.1 mg/m3 but 64.6% of the workplaces had less than 40 mg/m3. There was a positive correlation between the prevalence of benzene poisoning and the concentration in shoemaking factories. The prevalence of benzene induced aplastic anaemia in shoemakers was about 5.8 times that occurring in the general population. The results of this investigation show the need for a practicable hygiene standard to prevent benzene poisoning.
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3264
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Zhong LC, Cao ZA, Li Q, Shi Y. [Kinetics of delta'-dehydrogenation of hydrocortisone by Arthrobacter simplex By-2-13. I. Kinetics of delta'-dehydrogenation of hydrocortisone by free cells of Arthrobacter simplex By-2-13]. Wei Sheng Wu Xue Bao 1987; 27:45-51. [PMID: 3630138] [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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3265
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3266
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Li Q, Soukoulis CM. Quantum oscillations in one-dimensional metal rings: Average over disorder. Phys Rev B Condens Matter 1986; 33:7318-7321. [PMID: 9938081 DOI: 10.1103/physrevb.33.7318] [Citation(s) in RCA: 6] [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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3267
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Li Q. [On the formation of the surface zone on the enamel caries]. Zhonghua Kou Qiang Ke Za Zhi 1986; 21:90-2, 128. [PMID: 3463477] [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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3268
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Li Q, Powers PA, Smithies O. Nucleotide sequence of 16-kilobase pairs of DNA 5' to the human epsilon-globin gene. J Biol Chem 1985; 260:14901-10. [PMID: 4066658] [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: 01/08/2023] Open
Abstract
We have determined the nucleotide sequence of a 16-kilobase pair (kb) region of DNA on the 5' side of the human embryonic globin gene (epsilon). This sequence, when combined with previously published sequences, gives an uninterrupted sequence of 21 kb extending from approximately 19.5 kb upstream of the epsilon-globin gene to 0.3 kb 3' to its poly(A)-addition site. Computer-assisted analysis of this DNA reveals no large regions of self-homology but it shows the presence of seven members of the Alu family of repeated DNA, two very short members of the Kpn family of repeated DNA, one unusual direct repeat of 39 base pairs, and two potential stem and loop structures. The overall frequencies of mono- and dinucleotides within the 21 kb approximate those found in the total human genome but the distribution of (G + C)-rich regions signal many sequences of interest. The occurrences of some of the polynucleotides and polydinucleotides also differ appreciably from randomness, and the region contains several large stretches of these simple sequences. We found no evidence of strand asymmetry in the region. Homology between the nucleotide sequences of the human epsilon- and G gamma-globin genes extends only 100 base pairs 5' to the genes. One region, about 10 kb upstream of the gene, shows an apparent clustering of unusual sequence features. We discuss our sequence data in relation to the studies by others of DNAase hypersensitive sites and 5' transcription endpoints in this part of the beta-globin gene cluster.
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3269
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3270
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Abstract
We have mapped the distribution of the major and minor DNase I-hypersensitive sites in the human "beta-like-globin" gene domain. The minor DNase I-hypersensitive sites map close to the 5' end of each of the beta-like-globin genes. Their presence is specifically associated with the transcription of the immediate downstream beta-like-globin genes. The major DNase I-hypersensitive sites map in what appear to be the 5' and 3' boundary areas of the human beta-like-globin gene domain, a region estimated to span at least 90 kilobases of DNA. These major sites are present in various erythroid cells, which express predominantly either the embryonic, the fetal, or the adult beta-like-globin genes, and seem to be involved in defining the active beta-like-globin genes domain in cells of erythroid lineage. The four major DNase I-hypersensitive sites in the 5' boundary area, when correlated with sequencing data, are shown to be located in DNA regions containing enhancer core-like sequences and alternating purine and pyrimidine bases.
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3271
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Yang WL, Li Q. [Diagnosis and treatment of mammary tuberculosis]. Zhonghua Wai Ke Za Zhi 1985; 23:365-6, 383. [PMID: 4053854] [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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3272
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Li Q, Li H. Design of a broadband dichroic filter for transmitting visible and reflecting infrared bands. Appl Opt 1985; 24:1180. [PMID: 18217094 DOI: 10.1364/ao.24.001180] [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: 05/25/2023]
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3273
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Li Q. [Bacterial colonization study of asymptomatic parturients and their neonates]. Zhonghua Fu Chan Ke Za Zhi 1985; 20:105-7, 127. [PMID: 3891247] [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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3274
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Wu GY, Wang LM, Zhang JW, Liang X, Zhou P, Li Q, Long GF, Tang ZN, Liang R, Fei YJ. [First-trimester fetal diagnosis of alpha-thalassemia]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1984; 6:389-93. [PMID: 6242536] [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: 01/19/2023]
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3275
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Abstract
In an attempt to establish a relationship between proton pumping and the photocycle intermediates of bacteriorhodopsin, we have studied the effects of pH and temperature on flash-induced proton pumping and the photointermediates O640 and M412. The relative quantum yield of flash-induced proton pumping is both pH and temperature dependent. It is high in the acid pH range and at low temperatures but decreases in the basic pH range and at high temperatures. The decay of M412 is biphasic. The amplitude of the slowly decaying component (Ms) was found to be pH dependent with a pK similar to that of the delta pH. The pH dependence of the fast-decaying component (Mf) is opposite to that of Ms and delta pH. Like that of Ms, the amplitude of O640 is high in the acid pH range, but unlike the amplitude of Ms, it declines very rapidly at pHs greater than 6.5; the amplitude of O640 becomes zero around pH 8. The temperature dependence of the amplitude of Ms was found to be similar to that of delta pH, being high at low temperatures and low in the high-temperature range. The temperature dependence of Mf and O640 is opposite to that of delta pH and Ms. Whereas, O640 and Ms seem to be likely candidates (from the pH dependence) for coupling between proton pumping and the photocycle, Ms is more likely because (i) the relative quantum yield of both Ms and delta pH seem not to go to zero at higher pHs and (ii) Ms and delta pH have similar temperature dependence.
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3276
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Li Q, Pang RY, Jiang M, Ji XC, Zhou HK. [Clinical study on low birth weight infants]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1983; 5:322-4. [PMID: 6234084] [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: 01/19/2023]
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3277
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Chu YH, Zhou MH, Li Q, Zhao ZF. [Action of 15-methyl-prostaglandin F2 alpha on progesterone receptors and estradiol receptors in rabbit uterus]. Zhongguo Yao Li Xue Bao 1982; 3:256-60. [PMID: 6219542] [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: 01/19/2023]
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3278
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Zhou MH, Li Q, Shu HD, Bao YM, Chu YH. [Pharmacological study of the effect of Radix trichosanthis on terminating early pregnancy (author's transl)]. Yao Xue Xue Bao 1982; 17:176-181. [PMID: 7102332] [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: 05/21/2023]
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3279
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Lin BS, Dou GR, Cui ZH, Sun YP, Chang XS, Li Q. [Studies on pathomorphology, biological properties, and sensitivity to anti-tumor agents of the transplantable squamous cell carcinoma (GS-742) of mouse forestomach (author's transl)]. Zhonghua Zhong Liu Za Zhi 1981; 3:101-5. [PMID: 7307887] [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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3280
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Zhou MH, Li Q, Bao YM, Lin JB, Chu YH. [Antifertility effect of 17 beta-hydroxy-7 alpha-methylandrost-5-en-3-one and its hormonal activity (author's transl)]. Yao Xue Xue Bao 1981; 16:8-13. [PMID: 7246164] [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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3281
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Wang ZT, Wang DN, Li Q, Ouyang HJ. [Radioimmunoassay for an antischistosomal drug, 4-nitro-4'-isothiocyano-diphenylamine (7505) (author's transl)]. Yao Xue Xue Bao 1980; 15:463-469. [PMID: 7211390] [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: 05/21/2023]
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3282
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Li Q. [Vasoactive intestinal polypeptide]. Sheng Li Ke Xue Jin Zhan 1980; 11:227-32. [PMID: 6115467] [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: 01/18/2023]
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