STUDIES ON DOPAMINE RECEPTORS AND TETRAHYDROPROTOBERBERINES．Ⅱ．QUANTUM CHEMISTRY OF LIGAND－RECEPTOR INTERACTION

ＳＴＵＤＩＥＳＯＮＤＯＰＡＭＩＮＥＲＥＣＥＰＴＯＲＳＡＮＤＴＥＴＲＡＨＹＤＲＯＰＲＯＴＯＢＥＲＢＥＲＩＮＥＳ．Ⅱ．ＱＵＡＮＴＵＭＣＨＥＭＩＳＴＲＹＯＦＬＩＧＡＮＤ－ＲＥＣＥＰＴＯＲＩＮＴＥＲＡＣＴＩＯＮ￥ＹｕｎＴＡＮＧ；ＫａｉＸｉａｎＣＨＥＮ；Ｈｕａ...     

SYNTHESIS OF PEG-DENDRIMERIC PEPTIDE

ＳＹＮＴＨＥＳＩＳ　ＯＦ　ＰＥＧ－ＤＥＮＤＲＩＭＥＲＩＣ　ＰＥＰＴＩＤＥＳＹＮＴＨＥＳＩＳＯＦＰＥＧ－ＤＥＮＤＲＩＭＥＲＩＣＰＥＰＴＩＤＥ￥ＤｅＸｉｎＷＡＮＧ；ａｎｄＬｅｉＨＵＡＮＧ（ＩｎｓｔｉｔｕｔｅｏｆＭａｔｅｒｉａＭｅｄｉｃａ，ＣｈｉｎｅｓｅＡ...     

ASYMMETRIC EPOXIDATION OF CHROMENE DERIVATIVES WITH HYDROGEN PEROXIDE CATALYZED BY OPTICALLY ACTIVE Mn （Ⅲ） SALEN COMPLEX

ＡＳＹＭＭＥＴＲＩＣＥＰＯＸＩＤＡＴＩＯＮＯＦＣＨＲＯＭＥＮＥＤＥＲＩＶＡＴＩＶＥＳＷＩＴＨＨＹＤＲＯＧＥＮＰＥＲＯＸＩＤＥＣＡＴＡＬＹＺＥＤＢＹＯＰＴＩＣＡＬＬＹＡＣＴＩＶＥＭｎ（Ⅲ）ＳＡＬＥＮＣＯＭＰＬＥＸ￥ＨｏｎｇＢｉｎＳＵＮ；ＷｅｉＹｉＨＵＡ...     

THE ENANTIOSELECTIVE AUTOINDUCTION IN THE SYNTHESIS OF OPTICALLY ACTIVE SECONDARY ALCOHOLS

ＴＨＥＥＮＡＮＴＩＯＳＥＬＥＣＴＩＶＥＡＵＴＯＩＮＤＵＣＴＩＯＮＩＮＴＨＥＳＹＮＴＨＥＳＩＳＯＦＯＰＴＩＣＡＬＬＹＡＣＴＩＶＥ　ＳＥＣＯＮＤＡＲＹＡＬＣＯＨＯＬＳＺｈｅｎＹｕｎＹＡＮＧ；ＸｉｎＦＡＮ；ＸｉａｏＹｕｎＪＩＡＮＧ（ＤａｌｉａｎＩｎｓｔｉｔ...     

STUDIES ON THE MAGNETIC RESONANCE CONTRAST AGENTS SYNTHESIS AND SPIN－LATTICE RELAXIVITY OF AMINO ACIDS AND OLIGOPEPTIDYL DERIVATIVES OF GD－DTPA

ＳＴＵＤＩＥＳＯＮＴＨＥＭＡＧＮＥＴＩＣＲＥＳＯＮＡＮＣＥＣＯＮＴＲＡＳＴＡＧＥＮＴＳ：ＳＹＮＴＨＥＳＩＳＡＮＤＳＰＩＮ－ＬＡＴＴＩＣＥＲＥＬＡＸＩＶＩＴＹＯＦＡＭＩＮＯＡＣＩＤＳＡＮＤＯＬＩＧＯＰＥＰＴＩＤＹＬＤＥＲＩＶＡＴＩＶＥＳＯＦＧＤ－ＤＴＰ...     

DESIGN AND SYNTHESIS OF ANALOGS OF THE SCHISTOSOMA MANSONI P28 ANTIGENIC PEPTIDEP141

ＤＥＳＩＧＮ ＡＮＤ ＳＹＮＴＨＥＳＩＳ ＯＦ ＡＮＡＬＯＧＳ ＯＦ ＴＨＥ ＳＣＨＩＳＴＯＳＯＭＡ ＭＡＮＳＯＮＩ Ｐ２８ ＡＮＴＩＧＥＮＩＣ ＰＥＰＴＩＤＥＰ１４１￥ＪｉａＸｉＸＵ；ＺｈｉＨｕｉＱＩＮ；ＪｕｎＹ．ＡＮＧ；ＭｅｎｇＳｈｅｎＣＡＩ（Ｓ...     

DICHLORODIMETHYLSILANE－A USEFUL REAGENT FOR THE CLEAVAGE OF PEPTIDYL WANG RESIN

ＤＩＣＨＬＯＲＯＤＩＭＥＴＨＹＬＳＩＬＡＮＥ－ＡＵＳＥＦＵＬＲＥＡＧＥＮＴＦＯＲＴＨＥＣＬＥＡＶＡＧＥＯＦＰＥＰＴＩＤＹＬＷＡＮＧＲＥＳＩＮ￥ＤｅＸｉｎＷＡＮＧ；ＹｉｎｇＳＵＮ；ＧｕｉＳｈｅｎＬＵａｎｄＱｉｎｇＣｈａｉＸｕ（ＩｎｓｔｉｔｕｔｅｏｆＭａ...     

SYNTHESIS OF LINEAR CONJUGATED POLYBENZONITRILE WITH ULTRAFAST OPTICAL KERR EFFECT

ＳＹＮＴＨＥＳＩＳＯＦＬＩＮＥＡＲＣＯＮＪＵＧＡＴＥＤＰＯＬＹＢＥＮＺＯＮＩＴＲＩＬＥＷＩＴＨＵＬＴＲＡＦＡＳＴＯＰＴＩＣＡＬＫＥＲＲＥＦＦＥＣＴＸｉｏｎｇＹａｎＺＨＡＯ；ＱｉｎｇＸＵ．ＹｕａｎＫａｎｇＨＥ；ＨｕｏＹｉｎｇＣＨＥＮ（ＰｏｌｙｍｅｒＤｉ...     

DESIGN，SYNTHESIS AND ACTIVITIES OF ANALOGS AND SEGMENTS OF THE PAPAVER SOMNIFERUM POLLEN PEPTIDE PSPP2~1

ＤＥＳＩＧＮ，ＳＹＮＴＨＥＳＩＳＡＮＤＡＣＴＩＶＩＴＩＥＳＯＦＡＮＡＬＯＧＳＡＮＤＳＥＧＭＥＮＴＳＯＦＴＨＥＰＡＰＡＶＥＲＳＯＭＮＩＦＥＲＵＭＰＯＬＬＥＮＰＥＰＴＩＤＥＰＳＰＰ２￣１￥ＪｉａＸｉＸＵ；ＳｈｅｎｇＪＩＮ（ＳｃｈｏｏｌｏｆＣｈｅｍｉｓｔｒ...     

CYCLOPEPTIDES FROM STELLARIA DELAVAYI

ＣＹＣＬＯＰＥＰＴＩＤＥＳＦＲＯＭＳＴＥＬＬＡＲＩＡＤＥＬＡＶＡＹＩ￥ＹｕＲｕｔＺＨＡＯ；ＪｕｎＺＨＯＵ；ＸｉａｎｇＫａｉＷＡＮＧ；ＨｏｕＭｉｎｇＷＵ；ＸｉａｏＬｉｎＨＵＡＮＧ；（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｄｉｃｉｎａｌＣｈｅｍｉｓｔｒｙｏｆＮａｔ...     

聚四甲基亚苯基硅氧烷及其共聚物的亚微观结构与性能的关系

用ＳＡＸＳ法和偏光显微镜研究了ＰＴＭＰＳ均聚物和ＰＴＭＰＳ ＤＭＳ多嵌段共聚物熔体结晶的亚微观结构．结果表明ＰＴＭＰＳ和ＰＴＭＰＳ ＤＭＳ的亚微观结构参数，和球晶形态、晶体界面自由能表观积及基本物性参数等存在密切相关性．当ＤＭＳ含量为５０％时亚微观结构参数均显示一个转折变化过程，此时，球晶形态、晶体界面自由能、熔点、玻璃化温度和结晶度指数亦呈现一个突变过程．     

ZSM-5分子筛结晶度及晶粒大小的影响因素

以硅溶胶为硅源,偏铝酸钠为铝源,用晶种法制备ZSM-5分子筛.考察了物料混合方式、陈化时间、晶化时间、晶化温度、碱度和水量等对ZSM-5分子筛相对结晶度和晶粒大小的影响.用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和激光粒度分析等对所合成样品进行了表征.结果表明:在一定的高碱度条件下形成高浓度的硅铝酸盐凝胶,才能合成出晶化良好的样品,ZSM-5分子筛是按固相机理形成的;合成ZSM-5分子筛的相对结晶度和平均颗粒度均随晶化温度的升高及硅铝酸盐凝胶浓度的增加而增大,在室温陈化24 h、180℃晶化12～24 h时相对结晶度最高,平均颗粒度基本上与陈化时间无关.     

Synthesis and catalytic performance on methanol conversion of NiAPSO-34 crystals (I): effect of preparation factors on the gel formation

In order to synthesize the NiAPSO-34 crystal with a pure CHA structure having a uniform size and stable catalytic activity, factors having influence on the crystallization at gel preparation were investigated. The results showed that the mixing order of starting materials influences on the crystallization rate. The concentration of the template was related to the morphology of crystals and the crystallinity, while the particle size obtained was controlled by the silica source and the amount of nickel. Moreover, it was elucidated that the mixing orders of starting materials influences on the crystal growth rate. Seed crystal addition (SAPO-34; 0.8 μm) and ultrasonic-wave treatment after the gel formation were effective in decreasing smaller particle size and in narrowing the size distribution.     

双羟基复合金属氧化物的晶面生长选择性及晶粒尺寸控制

采用成核／晶化隔离法合成镁铝双羟基复合金属氧化物（LDH）,考察了晶化温度及晶化时间对晶体结构,晶面生长选择性及晶粒尺寸的影响规律。结果发现晶化温度相同时,随晶化时间延长,LDH的晶体结构趋于完整,晶粒尺寸增大;晶化时间相同时,随晶化温度升高,晶体结构趋于完整,晶粒尺寸显著增大,实验条件下得到的LDH,其沿a轴方向的尺寸均大于沿c轴方向的尺寸,即共沿a轴方向的生长速率比沿c轴方向的生长速度快,亦即[110]晶面的生长速率比[003]晶面的生长速率快。根据LDH晶粒尺寸随晶化时间及晶化温度的变化规律,选择合适的晶化条件,制备得到了粒径分布窄的纳米LDH。     

Deformation-induced morphology evolution during uniaxial stretching of isotactic polypropylene: effect of temperature

The effects of draw temperature on the deformation-induced morphology evolution of isotactic polypropylene in terms of crystal orientation, degree of crystallinity, crystal size in the direction normal to chain axis, long spacing, and the deformation behavior at the crystal lattice and lamellae scale were investigated using differential scanning calorimetry, two-dimensional wide-angle X-ray diffraction, and small-angle X-ray scattering, respectively. The results revealed that the thermal behaviors are associated with the deformation-induced morphology evolution, and the morphology evolution is strongly temperature dependent. At low strain, crystal fragmentation takes place at all the draw temperature range studied; at high strain, after crystal fragmentation the draw temperature shows different effects on the morphology evolution: at low temperature (25 °C), fragmentation of the crystal blocks continues; at medium temperatures (80 and 110 °C), the broken crystal blocks remain stable and the unfolded chains and disentangled chains in amorphous region crystallize into crystal blocks with crystal size almost identical to that of the original broken ones; at high temperatures (130 and 140 °C), not only the unfolded chains and disentangled chains in amorphous region crystallize into crystal blocks, but also these small broken crystal blocks melt and recrystallize and the new crystal blocks formed possess larger crystal size than those of the original broken ones.     

气相合成SnO2超微粒薄膜研究

用直流气体放电活化反应蒸发法在玻璃基片上沉积的SnO2超微粒薄膜,研究其过程中各工艺参数对薄膜结构的影响及作用机理.结果表明, SnO2超微粒薄膜粒径随氧分压增加而增大;蒸镀时间的延长有助于SnO2的生成,也使薄膜发生晶化;而增加放电电压,则薄膜出现外延单晶生长趋势.     

A METHOD OF PREPARING SPHERICAL NANO-CRYSTAL CELLULOSE WITH MIXED CRYSTALLINE FORMS OF CELLULOSE Ⅰ AND Ⅱ

A new kind of nano-crysta cellulose (NCC) prepared from natural cotton fiber has been obtained by the method ofacid hydrolysis. Compared to most other nanophase materials that derive from inorganic materials, our products are preparedfrom natural cotton fibers. The products are of spherical shape with mixed crystal forms of cellulose I and II. The preparationconditions determine the properties of the products. Prior treatment is a critical procedure. The properties of the products arealso strongly affected by such conditions as the kinds of acids used, the ratio of the acid mixture, the acid concentration, theultrasonic agitation time and hydrolysis temperature. The number average molecular weight of NCC is determined by gelpermeation chromatography (GPC). The particle size and shape were determined by transmission electron microscopy(TEM). X-ray diffraction was used to detect the crystallinity and average crystallite size of the panicle.     

镁铁双羟基复合金属氧化物的可控合成及晶面生长特征研究

采用成核/晶化隔离法合成镁铁双羟基复合金属氧化物MgFe-LDH,考察了Mg ∶ Fe摩尔比对MgFe-LDH晶形的影响,探讨了晶化温度及晶化时间对晶面生长选择性及晶粒尺寸的影响规律.结果表明,随Mg ∶ Fe摩尔比增大,层板阳离子排列更为规整.晶化温度对晶粒尺寸的影响显著大于晶化时间的影响.晶化温度相同,随晶化时间延长, MgFe-LDH的晶体结构趋于完整,晶粒尺寸变化不大;晶化时间相同,随晶化温度升高,晶体结构趋于完整,晶粒尺寸明显增大.所得到的MgFe-LDH沿a轴方向的晶粒尺寸对晶化温度变化的敏感程度远大于对晶化时间变化的敏感程度,但总是沿a轴方向的晶粒尺寸大于沿c轴方向的尺寸,即[110]晶面的生长速率比[002]晶面的生长速率快.     

包覆碳掺CoLiFePO4正极的电化学性能研究

应用水热法在200 oC下合成了橄榄石结构LiFePO4正极材料,合成过程中添加蔗糖作为包覆用碳源,并同时掺Co. 实验表明,包覆碳掺Co能更有效地改善LiFePO4电极的电化学性能. 样品可后退火处理,400 oC 退火LiFePO4样品结晶度和颗粒尺寸均影响了其电化学性能,包覆碳掺CoLiFePO4样品可使颗粒细化,改善电极倍率性能.     

Effect of surfactant and solvent properties on the stacking behavior of non-aqueous suspensions of organically modified clays

Montmorillonite clay was treated with quaternary ammonium surfactants with 1-3 long chains of 10-18 carbons to form organoclays which can be suspended in non-aqueous solvents. The effects of surfactant chain length, number of long chains, and the properties of the solvent on the colloidal behavior of the surfactant coated clay plates were studied using small-angle X-ray scattering. The scattering data were modeled using a one-dimensional aggregation theory to describe the stacking of the clay plates. The plates self-organize into stacks with a reproducible basal spacing in the range of 30-50 A, and for each surfactant, the basal spacing falls into one of two preferred distances. We interpret this by considering that the surfactant layer on the clay has two strata, one being the polar near-clay headgroup region and the other the nonpolar alkane chain region. Polar solvents will swell the polar stratum preferentially while nonpolar solvents will swell the nonpolar stratum of the surfactant. As the nonpolar stratum is larger than the polar one, the nonpolar solvents increase the basal spacing between the clay plates more than the polar solvents. The number of long chains on the surfactant does not have an effect on the basal spacing, as the density of surfactant molecules on the surface is low enough to allow the unimpeded swelling of the chains. The one-dimensional aggregation theory can be used to determine the number of plates in a stack, but the effect of changing clay particle size or concentration is not as great as would be expected from this theory. This may be due to the formation of large-scale structures in the suspensions which prevent a true equilibrium stack size being attained.