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TRIMETHYLSILYLATED SILICA AS RHEOLOGY MODIFIER FOR SILICONE RESINS

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Chinese Journal of Polymer Science 2000年第1期18卷 51-55页

作者： Wei huang ying huang Yunzhao Yu {3. for molecular Science, Institute of Chemistry, Chinese academy of sciences, beijing 100080, china Chinese Acad Sci Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

Trimethylsilylated silica was synthesized. through hydrolytic condensation of tetraethoxysilane followed by trimethylsilylation. Rheological properties of the silicone resin with trimethylsilylated silica as modifier were studied. It turned out that the particle size of silica was important to the rheological behavior of the modified resin. Trimethylsilylated silica of medium particle size shows the strongest tendency of forming physical network in the resin.

关键词： silica trimethylsilylation rheology modifier silicone resins

Capillary Electrophoretic Separation of Proteins under the Control of Radial Electric Field

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Chinese Chemical Letters 1999年第9期10卷 777-780页

作者： Yi CHEN ying ZHU(center for {2. {3.. Institute of Chemistry.Chinese academy of {3.. beijing 100080) Chinese Acad Sci Ctr Mol Sci Inst Chem Beijing 100080 Peoples R China

Separation of basic proteins was performed using a homemade field-modulated capillary electrophoresis system. The resolution. elution and even wall adsorption can be regulated by ad-lusting the radial rather than axia... 详细信息

关键词： capillary electrophoresis protein separation radial electric field control

SOLID PHASE TRANSITION OF SYNDIOTACTIC POLYSTYRENE IN SUPERCRITICAL CO_2

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Chinese Journal of Polymer Science 2002年第3期20卷 191-196页

作者： Yu-ying Li Jia-song He State Key Laboratory of Engineering Plastics, center for {2. Science, Institute of Chemistry Chinese {3. of sciences, beijing 100080 china Chinese Acad Sci Inst Chem Ctr Mol Sci State Key Lab Engn Plast Beijing 100080 Peoples R China

Solid phase transition of the a form crystals to the 3.form crystals in syndiotactic polystyrene (sPS) samples has occurred in supercritical CO2. This transformation is different from those detected under other conditions. The effects of some factors (e.g. time, temperature, and pressure) on the solid phase transformation of sPS in supercritical CO2.were analyzed in detail. Experimental results show that longer time, higher temperature or higher pressure favors the transformation of the a form crystals to the beta form crystals.

关键词： solid phase transition syndiotactic polystyrene supercritical CO2

Combined toxicity of copper and cadmium to six rice genotypes (Oryza sativa L.)

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Journal of Environmental sciences 2009年第5期21卷 647-653页

作者： huang Yizong, HU ying, LIU Yunxia Research {2. for Eco-Environmental {3., Chinese academy of {3., beijing 100085, china. [a]Research center for Eco-Environmental sciences Chinese Academy of Sciences Beijing 100085 China

Accumulations of copper （Cu） and cadmium （Cd） in six rice cultivars （94D-2., 94D-54, 94D-64, Gui63., YY-1, and KY13.0） were evaluated through exposure to heavy metal contamination （100 mg/kg Cu, 1.0 mg/kg Cd, and 100 mg/kg Cu ＋ 1.0 mg/kg Cd） in a greenhouse. The dry weights of shoot and root, concentrations of Cu and Cd in plant tissues and the Cu, Cd, P, Fe concentrations in the root surface iron plaques were analyzed eight weeks later after treatment. The results indicated that the plant biomass was mainly determined by rice genotypes, not Cu and Cd content in soil. Separated treatment with Cu/Cd increased each metal level in shoot, root and iron plaques. Soil Cu enhanced Cd accumulation in tissues. In contrast, Cu concentrations in shoot and root was unaffected by soil Cd. Compared to single metal contamination, combined treatment increased Cd content by 110.6%, 77.0%, and 45.2. in shoot, and by 112.7%, 51.2. and 18.4% in root for Gui63., YY-1, and KY13.0, respectively. The content level of Cu or Cd in root surface iron plaques was not affected by their soil content. Cu promoted Fe accumulation in iron plaques, while Cd has no effect on P and Fe accumulation in it. The translocation of Cu and Cd from iron plaques to root and shoot was also discussed. These results might be beneficial in selecting cultivars with low heavy metal accumulation and designing strategies for soil bioremediation.

关键词： Cu Cd combined contamination soil uptake accumulation root surface iron plaques

Synthesis of Macrocyclic Lactones Building on Double Calix[4]arenes

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Chinese Chemical Letters 2000年第10期11卷 403-404页

作者： Qi Yu ZHENG Chuan Feng CHEN Zhi Tang huang (center for {2. Science, Institute of Chemistry, The Chinese {3. of sciences, beijing 100080) Chinese Acad Sci Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

The macrocyclic lactones building on calix[4]arenes 3.-b and double calix[4]arenes 4a-b were synthesized by the reaction of p-tert-butylcalix[4]arene (1a) or calix[4]arene (1b) with glycol bis(2.chloroacetate) (2.. Th... 详细信息

关键词： macrocyclic lactones double calixarenes synthesis

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A Calorimeter for Measuring the Enthalpy of Solution of Solid Solutes in Supercritical Fluids and Study on CO2.Naphthlene System

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Chinese Chemical Letters 2001年第1期12卷 79-80页

作者： Xiao Gang ZHANG, Guang ying YANG , Bu Xing HAN*, Xi Feng ZHANG, Hai Ke YAN center for {2. {3., Institute of Chemistry, the Chinese academy of {3., beijing 100080 Chinese Acad Sci Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

An apparatus for measuring the enthalpy of solution of solids in supercritical fluids (SCFs) was constructed. The enthalpy of solution (ΔH) of naphthalene in supercritical (SC) CO2.was measured at 3.8.15 K in the pressure range from 8~11 MPa. It was found that ΔH was negative in the pressure range from 8 to 10 MPa, and the absolute value of ΔH decreases with increasing pressure. However, ΔH became positive at the pressures higher than 10 MPa. This unusual phenomenon can be explained by clustering between CO2.and naphthalene.

关键词： Solution enthalpy supercritical fluid molecular interaction

Age and mean platelet volume-based nomogram for predicting the therapeutic efficacy of metoprolol in Chinese pediatric patients with vasovagal syncope

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World Journal of Pediatrics 2024年第9期20卷 957-965页

作者： Xiao-Juan Du Ya-Qian huang Xue-ying Li ying Liao Hong-Fang Jin Jun-Bao Du Department of Pediatrics Peking University First HospitalNo.1 Xi’anmen StreetWest DistrictBeijing100034China State Key Laboratory of Vascular Homeostasis and Remodeling Peking UniversityNo.38Xueyuan RoadHaidian DistrictBeijing100191China Department of Statistics Peking University First HospitalBeijing100034China

Background Vasovagal syncope(VVS)is the most common type of orthostatic intolerance in *** investigated whether platelet-related factors related to treatment efficacy in children suffering from VVS treated with *** Metoprolol-treated VVS patients were *** median duration of therapy was three *** were followed and divided into two groups,treament-effective group and treatment-ineffective *** and least absolute shrinkage selection operator regressions were used to examine treatment outcome ***-operating characteristic(ROC)curves,precision-recall(PR)curves,calibration plots,and decision curve analyses were used to evaluate the nomogram *** Among the 72.patients who complete the follow-up,treatment-effective group and treatment-ineffective group included 42.58.3.)and 3.(41.7%)cases,*** patients in the treatment-effective group exhibited higher mean platelet volume(MPV)[(11.0±1.0)fl vs.(9.8±1.0)fl,P2.7%(12.3.,14.3.)vs.11.3.(10.2.,12.2.),P3.95%CI=2.2.7-13.711)might predict therapeutic *** area under the curve of the ROC and PR curves was computed to be 0.85 and 0.9,*** P value of the Hosmer-Lemeshow test was *** decision curve analysis confirmed that managing children with VVS based on the predictive model led to a net advantage ranging from 0.01 to *** nomogram is convenient for clinical *** A novel nomogram based on age and MPV can predict the therapeutic benefits of metoprolol in children with VVS.

关键词： Metoprolol Nomogram Retrospective study Therapeutic effect Vasovagal syncope

IN SITU INTERFEROMETRIC STUDY ON THE GELATION PROCESS OF POLYACRYLIC ACID GELS

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Chinese Journal of Polymer Science 2000年第4期18卷 373-377页

作者： ying Guan Qiang Chen Xian-min Zhang Yu-xing Peng Jian Xu Polymer Physics Laboratory, center for {2. Science, Institute of Chemistry, Chinese {3. of sciences, beijing 100080, china Department of Information & Electronic Engineering, Zhejiang University, Hangzhou 3.002., china Chengdu Institute of Organic Chemistry, Chinese {3. of sciences, Chengdu 610041, china Chinese Acad Sci Inst Chem Ctr Mol Sci Polymer Phys Lab Beijing 100080 Peoples R China Zhejiang Univ Dept Informat & Elect Engn Hangzhou 310027 Peoples R China Chinese Acad Sci Chengdu Inst Organ Chem Chengdu 610041 Peoples R China

In situ interferometry was used to investigate the gelation process of polyacrylic acid (PAA) gels. The basic principle of the in situ interferometry technique is illustrated. It can give sufficient information for non-destructive and successful investigation of the whole gelation process. The effect of initiator concentration on the gelation process was studied. The polymerization rate of AA increases with increasing initiator concentration. The error arising from the thermal effect in the gelation process can be neglected.

关键词： in situ interferometry gelation polyacrylic acid

Multicolor Circularly Polarized Luminescence of a Single-Component System Revealing Multiple Information Encryption

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CCS Chemistry 2024年第2期6卷 518-527页

作者： ying Hu Zizhao huang Itamar Willner Xiang Ma Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research center Frontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237 Institute of Chemistry The Center for Nanoscience and NanotechnologyThe Hebrew University of JerusalemJerusalem 91904

Metal-free materials with multicolor tunable circularly polarized luminescence(CPL)are attractive because of their potential applications in information storage and ***,we designed two enantiomers composed of chiral dialkyl glutamides and achiral vibration-induced emission(VIE)moiety,which can switch on CPL after a simple gelation *** is noteworthy that the CPL colors vary in different solvents,and this is attributed to various self-assembly-induced microstructures,in which the VIE moiety is restrained to different ***,a multidimensional code system composed of a quick response code,a ultraviolet(UV)light-activated color code,and a CPL information figure was *** our satisfaction,the system possesses multiple information-storage *** orthogonal anticounterfeiting and CPLenhanced encryption functions also improve the system information encryption *** brief,this study provides a practical example of CPL applied to information security and an effective approach to obtain a single-component color-tunable CPL material with multiple information storage and encryption functions as well.

关键词： circularly polarized luminescence information storage and encryption multicolor tunable single component vibration-induced emission