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Characterization and phase transition study for vesicles of fluorocarbon amphiphiles with 1,3.disubstituted glycerol structure

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chinese Journal of Chemistry 1992年第5期10卷 396-404页

作者： LIANG, Kang-Ning HUI, Yong-Zheng Shanghai institute of Organic Chemistry, chinese {2. of Sciences, Shanghai 2.003. Shanghai institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032

This paper presents the preparations and characterization of vesicles of four new fluoro- carbon amphiphiles with 1,3.disubstituted glycerol structure in common and different headgroups (OH, 1; CO_2., 2. quaternary ammonium salt, 3. and pyridinium salt, 4). These vesicles have higher transition temperature due to the stronger hydrophobic interaction between fluorocarbon chains. Addition of fluorocarbon additives with carboxylic acid or quaternary ammonium salt head group respectively shows different influences on phase behavior of vesicles of 2. These results are discussed based on the interaction within headgroup, hydrophobicity and specific mutahydrophobic interaction between fluoro- and hydrocarbon chains.

关键词： Characterization and phase transition study for vesicles of fluorocarbon amphiphiles with 1 3.disubstituted glycerol structure

Solubility prediction of HCl-MgCl2.H2. system at 50℃ using the ion-interaction model

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Solubility prediction of HCl-MgCl2-H2O system at 50℃ using ...

中国化学会第十三届全国化学热力学和热分析学术会议

作者： Yahong Li,Pengsheng Song, Wu Li, Shuping Xia (Key laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering , Suzhou University, Suzhou 2.5006, china Qinghai institute of {2. {3., chinese academy of Science, Xi''ning, Qinghai 810008,china)

＜正＞The component solubility of HCl-MgCl2.H2. system at 50℃ was calculated by using Pitzer’s ion-interaction model and its extended HW model. The values of the parameters of β（0）, β（1）,C（?） of HCl and MgCl2.were obtained from optimization of the literature data, and θMgH and ψMgHCl were derived by coupling activity coefficient with solubility data. The comparison between the results by using the

关键词： Pitzer’s ion-interaction model Activity Coefficient Manufacture process Solubility prediction

THE WETLAND TYPES,FUNCTIONS ANDCONSERVATION IN china

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chinese Geographical Science 2001年第4期11卷 14-19页

作者： ZHAO Kui-yi, HE Chi-quan( Changchun institute of Geography, the chinese {2. of Sciences, Changchun 13.02., P. R.{3.)

ABSTRACT: According to preliminary statistics, there are 9. 4 ×106ha of mire, 8. 0 × 106ha of lake, 2. 1 × 106ha of salt marsh, 2.1 × 107ha of shallow sea (0 - 5m), and 3. 8 × 107ha of paddyfield, their total area amounts to 8. 45× 107ha. Wetland consists of natural wetland system and man-made wetland system. According to hydrology, landform, soil and vegetation etc., natural wetland can be divided into the following types: marine, esturine, riverine, lacustrine, palustrine subsystems. On the basis of the wetland bottom compound, waterlogged state and vegetation forms, it can be subdivided into 2. wetland classes. Man-made wetland can be subdivided into 4 wetland classes. Wetland is a unique landscape in the earth and one of the most important living environment with rich resources and many functions. At present, 2.2.different types of Wetland Natural Reserves have been established in{2., in which 7 Wetland Nature Reserves have been listed in international important wetlands of The Wetland

关键词： wetland type wetland function wetland conservation china’s wetland

A kind of coccoid dinoflagel-lates-like fossils gives a new explanation of source of dinosterane in the Early-Middle Cambrian

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chinese Science Bulletin 2001年第5期46卷 420-423,442页

作者： BIAN Lizeng, ZHANG Shuichang, ZHANG Baomin, MAO Shaozhi & YIN LeimingDepartment of Earth Sciences, Nanjing University, Nanjing 2.0093.china Key Laboratory of Petroleum Geochemistry,{2. National Petroleum Corporation, Beijing 100083.{2. Research {3. of Petroleum Exploration and Development,{2. National Petroleum Corporation, Beijing 100083.{2. china University of Geosciences, Beijing 100083.{2. Nanjing {3. of Geology and Palaeontology, chinese academy of Sciences, Nanjing 2.0008,{2. Department of Earth Sciences Nanjing University Nanjing China Key Laboratory of Petroleum Geochemistry China National Petroleum Corporation Beijing China Research institute of Petroleum Exploration and Development China National Petroleum Corporation Beijing China china University of Geosciences Beijing China Nanjing institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China

The coccoid fossils covered with thick gelatinous envelop containing several gametes are discovered in gyps and salt deposits of Cambrian, H4 well and chert bed of the base of Yuertus Formation (∈11) of Xiaoerbulake Section. The fossils are described and compared with coccoid dinoflagellates. These fossils may be a coccoid life-cycle stage (vegetative cyst) of coccoid dinoflagellates. If this identification is correct, the coccoid dinoflagellates-like fossils could give a reasonable explanation of the dinoflagellate-specific biomarkers from Cambrian, H4 well, Tarim Basin.

关键词： coccoid dinoflagellates-like fossils dinoflagellate-specific biomarkers Cambrian Tarim Basin.

PREPARATION AND SEPARATING PROPERTIES OF MoS_2.γ-Al_2._3.CERAMIC COMPOSITE MEMBRANE FOR H_2.-H_2.MIXTURE

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化工学报 2000年第S1期51卷 65-68页

作者： Lu Xuchen, Li Youchu, Huang Changxiong and Qing Xiangdong (institute of Chemical Metallurgy, chinese {2. of Sciences, P.O Box 3.3., Beijing 100080,{3.)

MoS2.γ－Al2.3.ceramic composite membrane is successfully synthesized by the sol-gel method based on the inorganic salt route. The aluminum hydrate sol derived from the inorganic salt Al(NO3.3. whose transparence and viscosity are 97% and 1.2.× 10-3.Pa. s, respectively, can be formed through adjusting the ratio of the peptizing agent H+ to Al3. to 0.3. The aluminum hydrate gel at 110℃ is amorphous in structure and is heat-treated in air at 800℃ to form γ－Al2.3. The precursor derived from the mixture solution of ammonium molybdate, thioacetamide and a reducing agent, can be transformed into crystal MoS2.under reducing condition at 800℃. MoS2.γ－Al2.3.composite membrane is an organic whole and bps no gradation from MoS2.layer to γ－Al2.3.Iayer. The separation factor a H2.H2. through the MoS2.γ－Al2.3.composite membrane increase with rising temperature and a H2.H2. at 600℃ is 4.45 higher than the theoretical separation factor produced by the ideal Knudsen diffusion.

关键词： MoS2.γ-Al2.2.composite membrane sol-gel process separation of H2.-H2

青藏高原中部色林错湖近10年来湖面急剧上涨与冰川消融

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科学通报 2012年第5期57卷 571-579页

作者：孟恺石许华王二七刘锋中国科学院地质与地球物理研究所岩石圈演化国家重点实验室中国科学院研究生院 Department of Geosciences the Pennsylvania State UniversityUniversity ParkPA16802USA

量化了1976～2.10年间,特别是2.00～2.10年间西藏色林错、错鄂及班戈错的湖面面积及湖面海拔高度变化,分析了不同补给方式对湖面变化的影响,为最近10年青藏高原中东部气候变暖所致冰川加速消融提供了新证据.结合差分GPS实测湖面海拔、... 详细信息

量化了1976～2.10年间,特别是2.00～2.10年间西藏色林错、错鄂及班戈错的湖面面积及湖面海拔高度变化,分析了不同补给方式对湖面变化的影响,为最近10年青藏高原中东部气候变暖所致冰川加速消融提供了新证据.结合差分GPS实测湖面海拔、数字高程模型(DEM)及不同时相(1976～2.09年)湖面面积的遥感解译,研究提出:(1)近40年来色林错湖面海拔高度变化过程可分为两个阶段.1976～2.00年,色林错湖面海拔缓慢上升4.3.,平均0.18m/a;2.00～2.10年,湖面急剧上涨8.2.,平均0.82./a.与色林错近10年湖面海拔的快速增长对比,错鄂和班戈错的湖面上升趋势缓慢且平稳.(2.1976～2.09年间,色林错湖面面积变化过程经历了平稳增长→加速增长→平稳增长的变化过程.湖面总体扩大656.64km2.增长幅度为3..4%,特别是1999～2.09年间,湖面急剧扩大549.77km2.增长幅度为3..6%.根据气象数据相关性及湖水水位平衡分析,近期气温升高所致上游冰川的加速消融是色林错近10年湖面快速变化的主要因素--冰川融水直接导致色林错湖面上涨约8m,降水量的增加是影响湖面变化的次要因素;而主导班戈错湖面变化的因素是长期降水量的变化,气温的影响是次要因素.

关键词：色林错错鄂班戈错高海拔盐湖湖面上涨冰川消融气候变化相关分析

The Schiff-Base Ligand Control the Equilibrium Between the Titanium Complexes

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The Schiff-Base Ligand Control the Equilibrium Between the T...

中国化学会第六届全国结构化学学术会议

作者： Jian Wu,Zhou Chen,Wei Liu~*,Ya-Hong Li~* Key Laboratory of Organic Synthesis of Jiangsu Province,College of Chemistry,Chemical Engineering,and materials Science,Soochow University,Suzhou 2.5006,china, Key Laboratory of salt Lake Resources and Chemistry of {2. {3. of Sciences, Qinghai institute of salt lakes,Xining 810008,china

＜正＞A series of dinuclear titanium complexes with two metal centers being bridged by different aromatic amines,[Ti（L）（NR）Py]2.1）（R = tBuNH2.aniline,4-chloroaniline,4-bromoaniline,and 4-fluoroaniline;H2. =（（1H-pyrrol-2.yl）methyleneamino）-2.3.dihydro-1H-inden-2.o1）,have been synthesized and characterized by X-ray diffraction and elemental *** is proposed that there is equilibrium between

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Structure and Properties of Aqueous NaB(OH)4Solution

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Structure and Properties of Aqueous NaB(OH)4Solution

第十六届全国化学热力学和热分析学术会议

作者： Y.Q.Zhou~(1,2.,C.H.Fang~(1,*),Y.Fang~1,F.Y.Zhou~(1,2.,H.W.Ge~1,Q.L.Chen~(1,2. 1 Qinghai institute of salt {2.,{3. academy of Sciences,Xining 810008, 2.Graduate School of the {3. academy of Science,Beijing 100049,

Sodium tetrahydroborate is the most attractive chemical hydride for H generation and storage in automotive fuel cell applications,but recycling from the by-product(NaB(OH)) is difficult and *** electrochemical regeneration process could represent an economically feasible and environmentally friendly *** micro-Structure and physicochemical properties such as the volumetric and the transport properties at moderate temperatures affect the H generation and storage system as well as the electrochemical recyclability of the ***,electrical conductivity,pH,viscosity and Raman spectra of aqueous NaB(OH) solutions were precisely *** distribution in aqueous NaB(OH) solutions at 2.8.15K and 3.3.15K was calculated using measured pH value and Hteratural equilibrium constant.

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关于β-羟基-β-甲基丁酸钙(CaHMB)应用的科学共识

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中国食品学报 2024年第6期24卷 486-497页

作者：中国食品科学技术学会宋雁李雅慧顾文涛毛颖异陈铮但晓雅北京100048 国家食品安全风险评估中心江南大学国家功能食品工程技术研究中心南开大学中国轻工业特殊膳食营养与健康研究重点实验室中国食品科学技术学会

羟基-β-甲基丁酸钙(CaHMB)作为新食品原料,已在国内外多个国家获批,允许在特殊医学用途配方食品中使用,然而我国在该原料获批后十余年间尚未有相关特殊医学用途配方食品上市。相关行业、监管部门和消费者对应用CaHMB的健康作用、安全... 详细信息

羟基-β-甲基丁酸钙(CaHMB)作为新食品原料,已在国内外多个国家获批,允许在特殊医学用途配方食品中使用,然而我国在该原料获批后十余年间尚未有相关特殊医学用途配方食品上市。相关行业、监管部门和消费者对应用CaHMB的健康作用、安全性、使用剂量等方面的认知尚有待形成共识。为进一步推动CaHMB应用,服务人群营养健康需求,本文通过文献分析与专题研讨形式,在综合分析国内外有关CaHMB研究与应用现状的基础上,结合科技界与产业界有关专家意见,形成关于应用CaHMB的科学共识,即:1)通过新食品原料CaHMB(HMB的钙盐形式)补充HMB,是促进肌肉蛋白合成和减缓肌肉蛋白分解的一个重要途径;2.补充CaHMB有利于纠正负氮平衡,有利于老年人群、多类患病人群(如肌肉衰减综合征、肿瘤等)的肌肉健康;3.CaHMB的安全性被广泛认可,适当提高其每日最大食用限量,将更好地助力目标人群健康获益和产业应用发展。建议:从政策层面积极引导和适当提高CaHMB每日食用限量,以满足人群营养健康需求;进一步加强对Ca HMB的科研创新,为更好地应用CaHMB以及相关政策制定提供科技支撑;推动CaHMB在食品产业,尤其在特殊医学用途配方食品中的应用,促进相关产业高质量发展。

关键词： β-羟基-β-甲基丁酸钙新食品原料科学共识健康获益安全性