检索结果-南通市图书馆

Chinese Journal of Polymer Science 2001年第4期19卷 385-390页

作者： Zhong-ming Hu Li-heng Wu Da-cheng Wu Shou-xi Chen State Key Laboratory of Polymer Physics and Chemistry, Center for Molecular Science, Institute of Chemistry Chinese academy of Sciences, Beijing 100080, china china textile academy Beijing 100025, china textile College, Sichuan University Chengdu 610065, china china Text Acad Beijing 100025 Peoples R China Chinese Acad Sci Inst Chem Ctr Mol Sci State Key Lab Polymer Phys & Chem Beijing 100080 Peoples R China Sichuan Univ Coll Text Chengdu 610065 Peoples R China

The oriented chitosan films obtained from pre-sheared liquid crystalline chitosan/dichloroacetic acid (DCA) solutions were studied by means of polarized optical microscopy (POM), scanning electron microscopy (SEM), infra-red dichroism technique and wide angle X-ray diffraction (WAXD). The sheer induced band texture in the film was found to correspond to the sinusoidal fibrillar microstructure along the shearing direction on the basis of POM and SEM observations. The sinusoidal fibril was found to be lying within the film plane. The model of chitosan molecular orientation in the pre-sheared film with band texture can be established assuming that the main chain orients in the shearing direction and the side group is perpendicular to the shearing direction. The WAXD azimuthal scanning at 2 theta = 20 degrees indicates that the (002) plane orients perpendicular to the shearing direction.

关键词： chitosan morphology orientation shear induced band texture liquid crystalline solution

Studies on the Condensed Structure of Vacuum Cast Atactic Polystyrene Films

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Chemical Research in Chinese Universities 2000年第4期16卷 363-368页

作者： WANG You, HE Chu-ning and SHEN Jing-shu (Polymer Physics Laboratory, Institute of Chemistry, Chinese academy of Sciences, Beijing 100080, china) WU Li-heng and SONG Qing (china textile academy, Beijing 100025, china) Chinese Acad Sci Inst Chem Polymer Phys Lab Beijing 100080 Peoples R China china Text Acad Beijing 100025 Peoples R China

The condensed structure of atactic-polystyrene (a - PS ) films cast from the solutions of differ- ent concentrations in dichloromethane under vacuum and atmospheric conditions was studied by differential scanning calorimetry(DSC). It was found that only under vacuum evaporating conditions did the endothermic peak in the DSC curves of a-PS films depend on the concentration of the a-PS solution. For the samples cast from the solution of concentration below 0. 010 g/mL, no endothermal peak was observed, but for those cast from the solution of concentration above 0. 020 g/mL, obvious endothermal peaks appeared. The onset of the endothermal peak is correlated with the critical overlapping concentration c' (0. 010-0. 020 g/mL), which is in agreement with the theoretically calculated one (Ccal=0.014 g/mL).

关键词： Differential scanning calorimeter(DSC) Critical overlapping concentration Atactic polystyrene film

A HYPOTHESIS ON THE EFFECT OF CORIOLIS FORCE ON THE DEVELOPMENT OF RIGHT-LEFT ASYMMETRY OF MAMMALS

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Chinese Journal of Biomedical Engineering(English Edition) 1994年第3期3卷 98-103页

作者： Zhaosheng Zhang(Beijing Dayu Middle School,Beijing, 102300, china) Qing Yu(Peking Union Medical College Hospital, Beijing, 100730, china) Jiaxin Li(textile academy , Beijing, 100025, china)

The effect of the rotation of the earth, this non-inertial system, has beenneglected in the theories of evolution. In this article, we put forward the hypothesis thatthe Coriolis force due to the rotation of the earth is the primary cause of the right-leftasymmetry of body structures of the vertebrate. Theoretical deductions were made andcompared with available observations. Generally we found no contradiction. Afterwardsways for further validation are discussed.

关键词： Coriolis force the right-left asymmetry of body structures of mammals

A HYPOTHESIS ON THE EFFECT OF CORIOLIS FORCE ON THE DEVELOPMENT OF RIGHT-LEFT ASYMMETRY OF MAMMALS

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Chinese Journal of Biomedical Engineering(English Edition) 1993年第3期2卷 120-121页

作者： Zhaosheng Zhang~1 Qing Yu~2 Jiaxin Li~31 Beijing Dayu Middle School,Beijing 102300,china2 Peking Union Medical College Hospital ,Beijing 100730,china3 textile academy,Beijing,china

Coriolis Force is the Primary Cause of Right-left *** animal mov-ing on the Northern Hemisphere bears Coriolis force which is perpendicular to thevelocity of the motion and which points to the right of the *** right-direct-ing force will be denoted by *** acts throughout the life of an animal;indeed,throughout the lives of all of its ancestors,from the fetal to adult stages in everypart of the ***’s consider first a body with two legs sliding on *** leg would sustain a larger force than the left leg.A complex system of mus-

关键词： sustain Coriolis fetal sliding lives indeed throughout bears perpendicular Cause

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纺织科学研究

纺织科学研究 2021年第3期 66-66页

作者： china textile academy 中国纺织科学研究院有限公司

《纺织科学研究》杂志创刊于1984年,专注行业30余年,是由中国纺织工业联合会主管,中国纺织科学研究院有限公司主办的纺织专业期刊,国内外公开发行,每月5日出刊。杂志致力于推进科技与产业的融合,为科技成果产业化搭建平台。内容贯穿科...

《纺织科学研究》杂志创刊于1984年,专注行业30余年,是由中国纺织工业联合会主管,中国纺织科学研究院有限公司主办的纺织专业期刊,国内外公开发行,每月5日出刊。杂志致力于推进科技与产业的融合,为科技成果产业化搭建平台。内容贯穿科技创新的全领域和全过程。在确保权威性、专业性、可读性的基础上,杂志形成内容丰富、前瞻性强、观点鲜明、形式简约的风格。包括图闻、前沿、头条、深度、专题、动向、百科、学术等具有影响力的精彩版块,倾力打造最实用的纺织专业媒体。

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