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CRYSTAL STRUCTURE OF OXAZOLIDINE-2-THIONE

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结构化学 1986年第1期 52-55页

作者： Liang Li Hu Zhong institute of biophysics, academia sinica, Beijing institute of Botany, academia sinica,Kunming

Crystals of. oxazolidine-2-thione, G3H5SNO, are triclinic,P1, a = 5.738（3）, b = 5.928（4）, c = 7.763（5） A, （?） = 83.05（6）°, α= 67.68（5）°, r = 77.85（5）°, Z = 2, V = 235.8A3, Dx = 1.45 ***-3, P（000） = 108, Mr = 103.14, m.p. = 96.2°-97.2°C, （MoK（?）） = 0.71069A, T = 293K, μ（MoK（?）） =0.051 mm-1. The structure was solved by direct methods and. difference Fourier synthesis. The final R was 0.033 for 655 unique observed reflections. It is a new hydrolysis and rearranging product of 2-hydryoxyl ethyl glucosinolate from the seeds of Copparis masaikai Levl.. The study of its physiological activity is in progress.

关键词： CRYSTAL STRUCTURE OF OXAZOLIDINE-2-THIONE

EFFECT OF CHRONIC IRRADIATION OF 60Co-γ-RAY AT LOW DOSE RATE ON RHESUS MONKEY （MACACA MULATTA）

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Science in China,Ser.A 1980年第9期 1170-1181页

作者： Cooperative Research Group of Low Dose Irradiation, institute of biophysics, academia sinica Cooperative Research Group of Low Dose Irradiation institute of biophysics academia sinica

This paper briefly presents the results of the systematic observation of the chronic irradiation of 60Co-γ-ray on rhesus monkey （Macaca mulatta） at low dose rate. It also provides valuable experimental data on the ... 详细信息

关键词： In EFFECT OF CHRONIC IRRADIATION OF MACACA MULATTA RAY AT LOW DOSE RATE ON RHESUS MONKEY AT

A study of song characteristics and hearing in the bushcricket Gampsocleis gratiosa

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Chinese Journal of Acoustics 1991年第4期10卷 359-366页

作者： SHEN Junxian and TANG Huan(institute of biophysics, academia sinica, Beijing 100080)

The structure, power spectrum and temporal parameters of the calling song of the bushcricket Gampsocleis gratiosa were studied with acoustic analysis techniques. The bushcricket uses an elytro-elytral mechanism in sound production: the denticulated vein ( file ) on the under-surface of the left elytron is rubbed by the insider edge of the right elytron ( plectrum ). The file-train of pulses is composed of one elytra-opening pulse and 6 - 7 elytra-closing tooth pulses. The power spectrum of the song covers a wide frequency band. The acoustic energy is mainly distributed over the frequency range between 3 and 35 kHz. The predominant peak lies near 7.5 kHz and the next one around 4.0kHz. The song intensity is measured of about 105 dB SPL at a distance of 10 cm from the animal. The temporal parameters of the song are dependent on the ambient temperature. Three-dimensional digital spectrograms of the song show its dynamic changes of the energy peaks. The bushcricket is very sensitive to acoustic stimuli and its thresholds are less than 30 dB SPL in the frequency range from 7 to 18 kHz, which corresponds to dominant energy zone. The auditory neurons of the bushcricket can code the temporal parameters of the calling songs.

关键词： A study of song characteristics and hearing in the bushcricket Gampsocleis gratiosa

GLYCOLIPID COMPOSITION AND PHASE BEHAVIOR OF Acholeplasma laidlawii MEMBRANES

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Chinese Science Bulletin 1989年第6期34卷 514-517页

作者：黄芬赵宝贞文德成钱玉民 institute of biophysics Academia Sinica Beijing Changchun institute of Applied Chemistry Academia Sinica

Glycolipid is the major component of the Acholeplasma laidlawii (A. laidlawii) membranes and amount to 50% of the total lipids. The physiological function of membrane glycolipids is little known. In the present work w... 详细信息

关键词： Acholeplasma laidlawii glycolipid lipid bilayer hexagonal Ⅱ structure.

AN X-RAY ANALYSIS OF THE ORTHORHOMBIC CRYSTAL FORM OF TRICHOSANTHIN AT 5

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Science in China,Ser.B 1987年第7期30卷 692-697页

作者：马星奇王耀萍王家槐 institute of biophysics academia sinica Beijing

Trichosanthin crystals grown at pH 5.4 are orthorhombic P212121 with cell dimension α=38.23, b=76.18 and c=79.12. Each asymmetric unit contains one protein molecule of 234 amino acid residues （M. W. 26,000）. The structure has been solved at 5 resolution by conventional MIR method with two heavy-atom derivatives. The preliminary result suggests that the protein molecule in acidic solution does not have dramatic conformational change, compared with that in alkali solution.

关键词： AN X-RAY ANALYSIS OF THE ORTHORHOMBIC CRYSTAL FORM OF TRICHOSANTHIN AT 5

STEREOCHEMISTRY OF A DERIVATIVE OF QINGHAOSU - ARTESUNATE, C19H28O8

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结构化学 1986年第2期 73-77页

作者： Liang Li Dong Yicheng Zhu Naijue institute of biophysics, academia sinica, Beijing institute of Chemistry, academia sinica, Beijing

Artesunate, C19H28O8, is orthorhombic and crystallizes in the space group D24 -P212121 with a = 18.781(4), b = 10.528(5), c = 9.853(5) A, Z =4, V = 1948 A3, DC = 1.310 ***-3, Mr = 384, F(000) = 824, m.p.= 134°-5°, dD21.5= +12.5 (c:2%, CHCl3), μ(CuKd) = 0.0867mm-1, λ(CuKd) = 1.5418A, T =293K. The X-ray study was carried out to determine the stereochemistry at the four chiral centers and to compare the skeleton of the title compound with that of Qinghaosu. The structure was solved by direct methods and refined for the 1620 reflections with I > 2σ(I) to a final R factor of 0.067.

关键词：七八 STEREOCHEMISTRY OF A DERIVATIVE OF QINGHAOSU ARTESUNATE O8

Mg2+-MEDIATED CHANGE IN LIPID FLUIDITY ENHANCES THE RECONSTITUTED H+-ATPASE ACTIVITY

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Science in China,Ser.B 1983年第10期26卷 1046-1056页

作者：杨福愉郭倍奇王大辉 institute of biophysics academia sinica Beijing

The results by using ANS fluorescent probe and spin labels 5-NS show that the fluidity of L.（H+-ATPase）+Mg2+ (H+-ATPase from pig heart mitochondria reconstituted in the presence of Mg2+) is less than that of L （H+-ATPase）-Mg2+ (proteoliposome reconstituted in the absence of Mg2+). But no significant difference in fluidity has been observed when both reconstituted systems were monitored by using spin labels 12-NS and 16-NS. This indicates that Mg2+ may cause changes in fluidity of the lipid molecules near the surfaces of the bilayers, but does not affect significantly the fluidity of the deeper layer of the reconstituted *** is tentatively supposed that in the presence of Mg2+, enhancement of activities of reconstituted H+-ATPase may be due to the Mg2+-mediated change in physical state of the lipids in the more superficial region of lipid bilayers so as to ensure a suitable conformation of ATPase complex, thereby possessing higher activity.

关键词： NS ATPASE ACTIVITY MEDIATED CHANGE IN LIPID FLUIDITY ENHANCES THE RECONSTITUTED H Mg ATPase

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栝楼核糖核酸酶在RNA序列分析中的应用

生物化学与生物物理进展 1996年第3期23卷 257-260页

作者：赵华陵中国科学院生物物理研究所

栝楼核糖核酸酶（ＲＮａｓｅＴＣＳ）对Ｕ碱基具有高度的专一性，在无脲、ｐＨ３．５、５０℃时，它几乎都在－Ｎｐ↓Ｕ－处裂解ＲＮＡ它与ＲＮａｓｅＴ１，Ｕ２和有限的碱水解一起，可用于直接的酶法ＲＮＡ序列分析．

关键词：栝楼栝楼核糖核酸酶 RNA 序列分析种子植物

ESR STUDIES OF SPIN-TRAPPED RADICALS IN GAMMA-IRRADIATED POLYCRYSTALLINE PYRIMIDINE NUCLEOSIDES——THYMIDINE AND DEOXYCYTIDINE HYDROCHLORIDE

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Science in China,Ser.B 1987年第6期30卷 599-606页

作者：盛沛根王华黎臧伦义张志义 institute of Biochemistry academia sinica Shanghai institute of biophysics Beijing

Room-temperature free radicals produced in gamma-irradiated polyerystalline thymidine and deoxy-cytidine hydrochloride were studied by spin-trapping and ESR methods with NtB （nitroso-t-butane） serv-ing as the spin trap. Three types and two types of base radicals were identified for them respectively,which was completely consistent with the results in single-crystal ESR studies, and thereby standard ESRspectra of their R·spin adducts were obtained. In addition, ribose radicals HOC（5’）HC（4’）H

关键词： ESR STUDIES OF SPIN-TRAPPED RADICALS IN GAMMA-IRRADIATED POLYCRYSTALLINE PYRIMIDINE NUCLEOSIDES THYMIDINE AND DEOXYCYTIDINE HYDROCHLORIDE line