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Oxidation Experiment of Natural Megacrystal Ch'nopyroxene: Implications for Assignment of Mossbauer Spectra

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Acta Geologica Sinica(English Edition) 2001年第1期 51-58页

作者： ZHI Xiachen, CHEN PengDepartment of Earth and Space Sciences, University of Science and Technology of China laboratory of chemical geodynamics, ustc Advanced Research Center for Earth Science and Astronomy in ustc, Third World Academy of Science,{3. LIN Chengzhong, CHEN Shuqing, ZHANG GuilanInstitute of Mineral Resources, Chinese Academy of Geology Sciences, Beijing 10003.LI Yuzhi and LIN Lei Open laboratory of Structure Analysis, ustc,{3.

The Mossbauer spectra of natural megacrystal clinopyroxene are usually fitted by 4 sets of symmetric doublets, A-A', B-B', C-C' and D-D', respectively, in terms of increasing Qs value in literature. But the assignments of those doublets are quite different, except the D-D' doublet assigned to Fe3. at the lattice site Ml in previous papers. Particularly, the assignment and interpretation of the C-C' doublet are *** oxidation experiments of natural megacrystal clinopyroxene collected from the Hannuoba basalt, North China, were performed under controlled conditions of temperature at 1000℃ and oxygen fugacity of FMQ buffer in 1, 2, 3.and 5 days respectively. The oxidized samples were then measured by X-ray diffraction spectrometry and Mossbauer spectrometry. The oxidation of clinopyroxene is characterized by Fe2+→ Fe3. at Ml under the subsolidus conditions, which is consistent with the increase of the area of the D-D' doublet when the heating time increases. Accordingly, the area of the A-A' and B

关键词： megacrystal clinopyroxene Mossbauer spectrum oxidation experiment anomalous doublet

Formation of complexes of Rubisco-Rubisco activase from La^3., Ce^3. treatment spinach

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Science China Chemistry 2005年第1期48卷 67-74页

作者： HONG Fashui1, LIU Chao1, ZHENG Lei1, WANG Xuefeng1, WU Kang1, SONG Weiping1, Lü Shipeng1, TAO Ye2 & ZHAO Guiwen3.1. College of Life Sciences, Suzhou Universty, Suzhou 215006, China 2. Synchrotron Radiation laboratory, Institute of High Energy Physics, The Chinese Academy of Science, Beijing 10003., China 3. chemical Department, University of Science and Technology of China, hefei 23.026, China College of Life Sciences Suzhou Universty Suzhou China Synchrotron Radiation laboratory Institute of High Energy Physics The Chinese Academy of Science Beijing China chemical Department University of Science and Technology of China Hefei China

The complex of Rubisco and Rubisco activase from LaCl3., CeCl3. treated spinach in vivo is induced. SDS-PAGE result shows that the purified proteins from LaCl3., CeCl3. treated spinach have not only large and small subunits (55 kD, 14.4 kD) of Rubisco, but also two large subunits of 45 kD and 41 kD near the large subunits of Rubisco. Native-PAGE shows that the purified proteins from LaCl3., CeCl3. treated spinach have not only a band of Rubisco (560 kD), but also a band of about 1100 kD, about twice distant from Rubisco, which might be a complex of Rubisco and Rubisco activase. The purified enzyme activities from LaCl3., CeCl3.treated spinach are 1.8 and 2.8 times that of the control,the intensities of absorption and fluorescence are sig- nificantly higher than that of the purified Rubisco from the control, and the total sulfhydryl groups and available sulfhydryl groups are 3.—3. –SH per mol enzyme, 14—25 –SH per mol enzyme more than those of the purified Rubisco from the control, respectively. The CD spectra show that the secondary structure of the purified enzyme from LaCl3., CeCl3.-treated spinach is very dif- ferent from the control. The enzyme activities from LaCl3., CeCl3. treated spinach in vivo are 1.5 and 1.9 times those of the control.

关键词： La3., Ce3., spinach, Rubisco, complex of Rubisco and Rubisco acitivase, spectral characteristics.

Hydrocarbon test in lower-layer atmosphere to predict deep-sea petroleum or hydrate in the Okinawa Trough: an example

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Acta Oceanologica Sinica 2003年第4期22卷 569-576页

作者： Gong Jianming1, Chen Jianwen 1, 2, Li Gang1, Zhang Xunhua1, Li Jipeng3. Huang Fulin1 1. Qingdao Institute of Marine Geology, Qingdao 266071, China. 2. Ocean University of China, Qingdao 266003. China 3. hefei Institute of Petroleum chemical Exploration, China Petroleum Exploration and Development Research Institute, hefei 23.022,China Qingdao Institute of Marine Geology Qingdao 266071 China Ocean University of China Qingdao 266003 China hefei Inst. Petroleum Chem. Explor. China Petroleum Explor./Devmt. Res. Hefei 230022 China

Light hydrocarbon (methane, ethane, propane, butane and CO2) test and C isotopic analysis of CO are conducted for over 100 lower-layer atmospheric samples from the East China Sea slope and the Okinawa Trough. The results show that the lower-layer atmosphere mainly consists of CO2 and then of CH4, and the CO2 concentrations are calculated to have a high average value of 0.87 omega/10(-2) about three times that of the regional background (0-3.omega/10(-2)). The result also shows that the average value of C isotope - 20.8 x 10(-3. is given to the CO2, inferring that it is inorganic gas. Thus, for the future 's work in the Okinawa Trough, special attention should be paid to CO2 hydrate, which is very possibly an important hydrate type.

关键词： lower-layer atmosphere hydrocarbon test C isotopic analysis deep-sea petroleum gas hydrate

Development of Multi-Wavelength Spectral-Correction Method

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Chinese chemical Letters 2000年第10期11卷 893-894页

作者： Hong Wen GAO (School of Chemistry and chemical Engineering, Anhui University, hefei 23.03.) Sch. of Chem. and Chem. Engineering Anhui University Hefei 230039 China

This investigation developed a new method for determining metal complex's property containing the stepwise real absorptivity(epsilon) and stability constant (K-m). The correction equation of the multi-wavelength spectral absorption was established for the simultaneous determination of various complexes to give high accuracy for trace analysis. This method was more acceptable in theory and simpler in operation than the classical methods.

关键词： simultaneous determination multi-wavelength spectral-correction complex property

Mesozoic-Cenozoic tectonic transition in Kuqa Depression-Tianshan,Northwest China:Evidence from sandstone detrital and geochemical records

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Science China Earth Sciences 2005年第9期48卷 1387-1402页

作者： LI Zhong1, GUO Hong2, WANG Daoxuan3.& LIN Wei1 1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2. Tarim Oilfield Branch, CNPC, Korla 841000, China 3. hefei University of Industry, Tunxilu 193. hefei 23.009, China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing Chin Tarim Oilfield Branch CNPC Korla China hefei University of Industry Hefei Chin

Similar to compositional evolution of sandstone modes and detrital heavy minerals from different profiles in the Kuqa Depression, Northwest China, major element analysis of whole sandstones from the same profiles shows four discontinuous depositional interfaces or periods, respectively corresponding to Lower Triassic\Middle Triassic, Upper Jurassic\Lower Cretaceous, Lower Cretaceous\Paleogene and Miocene\Pliocene, and indicates five-phase evolution during Mesozoic-Cenozoic: (1) From the first to fifth phase, a depositional suite changes from maroon and coarse clastic, through grey-dark grey and fine, red and coarse, red-mottled, interlayered by gypsum, to brown and coarse clastic assemblages, accompanying detrital component evolution in unstable-stable-unstable-very unstable-very unstable assem- blages. It is indicated that carbonate and complex detritus gradually dominate in sandstones in post-Late Jurassic, with rapid reduction of compositional maturity. (2) For major element geo- chemical parameters of whole sandstones, CaO and Fe2 O * 3.MgO contents show a change sequence in high-low-high-higher-highest values, with rapid increasing in post-Late Jurassic. (3. Contra some aggregative indicators for weathering indexes of sandstone detrital component, Al2O3.(CaO+Na2O) and ln(Q/(L+CE)), show a change sequence in low-high-low-lower-lowest ratios, with rapid decreasing in post-Late Jurassic. It is found that sandstone samples of the first, second and later three phases may be distinguished from the A-CN-K and A-CNK-FM diagrams respectively. Therefore, in the Kuqa Depression-Tianshan, the most important discontinuous depositional interface recording paleotectonic and paleoclimatic transition occurred in Early Triassic\Middle Triassic and Late Jurassic\Early Cretaceous, respectively, and, however, tec- tonic differentiations of basin-range system finally result in distinct depositional systems but similar detrital weathering indexes across the Lower Cretaceous\Paleogene

关键词： Tianshan, Kuqa Depression, basin-range, depositional record, tectonic transition, Mesozoic-Cenozoic.

Re-Os isotopic composition of the Dongling ⅢCD iron meteorite

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Chinese Science Bulletin 2001年第6期46卷 518-520页

作者： SUN Weidong, DU Andao, YANG Gang, XIE Zhi & CHEN JiangfengDeparlmenl of Earth and Space Sciences, laboratory tor chemical geodynamics. University of Science and Technology of China,{3.. China:Institute of Rock and Mineral Analysis, Chinese Academy of Geological Sciences. Beijing 10003., China Department of Earth and Space Sciences Laboratory for Chemical Geodynamics University of Science and Technology of China Hefei China Institute of Rock and Mineral Analysis Chinese Academy of Geological Sciences Beijing China

Re, Os concentrations and Os isotopic compositions of the Dongling ⅢCD iron meteorite were determined by N-TIMS technique. The result was compared with that of the other irons and chondrites. The Re and Os concentrations of the Dongling iron meteorite were plotted on the trends of the group ⅢA and ⅣA irons. The Pt-Os relation of the Dongling iron meteorite is similar to that of the group ⅡA irons. That suggests a higher fractionation for the Dongling iron meteorite.

关键词： Dongling iron meteorite Re-Os isotopes N-TIMS.

铝源对Cu-Al尖晶石物化性质和逆水煤气变换性能的影响

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燃料化学学报（中英文） 2024年第6期52卷 809-819页

作者：刘雅杰康荷菲鲁晔张鹏葛晖晋中学院山西晋中030619 中国科学院山西煤炭化学研究所山西太原030001 中国科学院大学北京100049

基于高能球磨和固相焙烧的方法,采用杂质元素(Na、Fe、Si和S)含量不等的四种拟薄水铝石和氢氧化铜制备了Cu-Al尖晶石固溶体催化剂,通过ICP-AES、TG、XRD、H2-TPR和BET表征了催化剂的物化性质,并考察了对逆水煤气变换反应的催化性能。结... 详细信息

基于高能球磨和固相焙烧的方法,采用杂质元素(Na、Fe、Si和S)含量不等的四种拟薄水铝石和氢氧化铜制备了Cu-Al尖晶石固溶体催化剂,通过ICP-AES、TG、XRD、H2-TPR和BET表征了催化剂的物化性质,并考察了对逆水煤气变换反应的催化性能。结果表明,拟薄水铝石中的杂质元素对于Cu-Al尖晶石催化剂的物相性质、还原性能、织构性质和催化性能有显著的影响,Si有助于合成高比表面积的催化剂,但不利于Cu-Al尖晶石生成,导致催化活性低;含有少量Na和Fe的尖晶石的催化活性较低;S物种经高温焙烧后分解,对催化活性没有影响;基于杂质元素含量最低的拟薄水铝石合成的催化剂中难还原尖晶石含量最高,表现出最高的逆水煤气变换催化活性。此外,基于活性最优样品的CO_(2)-TPDMS和In-situ DRIFTS分析表明,Al上形成的双齿甲酸盐是Cu-Al尖晶石固溶体催化CO_(2)加氢生成CO的主要中间产物,其含量与催化活性随反应时间的变化规律一致。

关键词：铝源 Cu-Al尖晶石物化性质催化性能逆水煤气变换反应机理

Synthesis of N^(11)-anchoring biotinylated artemisinin derivatives and their preliminary biological assessment

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Science China Chemistry 2010年第1期53卷 119-124页

作者： PAN QiYu1,2,WANG ShaoZhong1,LU JinJian3.MENG LingHua3.& YAO ZhuJun1,2 1Nanjing National laboratory of Microstructures(NNLM),School of Chemistry and chemical Engineering,Nanjing University,Nanjing 210093.China 2Joint laboratory of Green Chemistry,Department of Chemistry,University of Science and Technology of China,{3. 23.026,China 3.tate Key laboratory of Drug Research,Shanghai Institute of Materia Medica,Shanghai Institutes for Biological Sciences,Chinese Academy of Sciences,Shanghai 201203.China. Nanjing National laboratory of Microstructures (NNLM) School of Chemistry and Chemical Engineering Nanjing University Nanjing China Joint laboratory of Green Chemistry Department of Chemistry University of Science and Technology of China Hefei China State Key laboratory of Drug Research Shanghai Institute of Materia Medica Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai China

Unique endoperoxide moiety of artemisinin and its derivatives has been considered the functionality exhibiting highly potent antimalarial and anticancer *** investigate the mechanisms of their biological actions,development of suitable molecular probes including biotinylated derivatives is of extreme *** synthesis and preliminary biological assessment of four new biotinylated artemisinin derivatives have been reported in this work.

关键词： artemisinin endoperoxide biotinylated derivative synthesis anticancer activity

Structural phase transition in nanostructured γ-Fe_2O_3

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Chinese Science Bulletin 1997年第11期42卷 894-897页

作者： YE Xisheng, SHA Jian, SONG Hongqin, JIAO Zhengkuan, LU Guanglie, PENG Zifei and ZHANG Lide1. Department of Physics, Zhejiang University, Hangzhou 3.0027, China 2. Central laboratory, Hangzhou University, Hangzhou 3.0028, China 3. Institute of Solid State Physics, Chinese Academy of Sciences, hefei 23.03., China Department of Physics Zhejiang IJniversity Hangzhou China Central laboratory Hangzhou University Harigzhou China Institute of Solid State Physics Chinese Academy of Sciences Hefei China

DUE to their specific physical,chemical and mechanical properties and large application proba-bility in many fields,nanostructured materials have been developing very fast in the recent *** stability is an important property of the *** interesting resultshave been obtained in the study of the thermal stability of nanostructured materials.

关键词： nanostructured γ-Fe2O3 differential thermal analysis (DTA) XRD microstructlire structural phase transition.