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Copyright of Chinese Journal of Pesticide Science / Nongyaoxue Xuebao is the property of Chinese Journal of Pesticide Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The experiment aims to use ultrasound to extract total flavonoids from Cymbidium holostegius. Based on the results of single factor experiments and orthogonal experiments, the optimal extraction conditions are optimized. The antioxidant activity of total flavonoids from Cymbidium holostegius is studied by clearance rates of DPPH free radical and OH free radical by both aboveground and underground flavonoids. The experimental results showed that the optimal extraction process conditions for total flavonoids from Cymbidium holostegius were ethanol volume fraction of 45%, ultrasound time of 15 min, and liquid-solid ratio of 45 mL/g. Under these conditions, the extraction rate of total flavonoids from Cymbidium holostegius was 7.68%. There was a certain dose-effect relationship between the above ground and underground parts of Cymbidium holostegius, and the clearance rates of DPPH free radical and OH free radical are as high as 98.3% and 98.2% at 0.425, 0.460 g/mL, respectively. The clearance rates of OH free radical between the two parts show a certain dose-effect relationship in the mass concentration range of 0.085~0.450 g/mL. However, at the same concentration, the two have opposite scavenging abilities for DPPH free radical and OH free radical. The study indicates that the experimental results could provide the research direction and basis for the basic research of the material composition and the selection of the medicinal parts of Cymbidium holostegius. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Pesticide Science / Nongyaoxue Xuebao is the property of Chinese Journal of Pesticide Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Diabetes Mellitus is the property of Chinese Journal of Diabetes Mellitus and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

运用透射电镜技术对采自浙江的日本医蛭和天目山蛭的光感受器—眼的超微结构进行了比较研究.发现两者的主要差别在于前者眼的色素杯浅，且宽度与深度较为接近，透光体微绒毛可卷曲；后者眼的色素杯深，其深度明显大于宽度，透光体微绒毛未见卷曲.天目山蛭感光细胞中由微绒毛组成的感光膜表面积远大于日本医蛭，因此陆生蛭类的感光能力比水生种类强，这与陆地环境的复杂性有一定关系.

采用垂直平板聚丙烯酰胺凝胶电泳对日本医蛭和天目山蛭的酯酶(ES)、苹果酸脱氢酶(MDH)、过氧化物酶(POX)、乳酸脱氢酶(LDH) 4种同工酶共计11个位点的15个等位基因进行了分析,4种同工酶基因在2种蛭中表达程度以及LDH同工酶酶谱相似,但是日本医蛭比天目山蛭ES同工酶多2个位点,3个基因;MDH少1个基因;POX同工酶多2个位点,2个基因;LDH同工酶等位基因表达的亚单位类型和数目不同.同时分析了冬眠与非冬眠期日本医蛭LDH同工酶活性差异的原因,为在分子水平研究蛭类分类、不同环境温度下酶的活性变化等提供和积累新的生物学资料.

Copyright of Pearl River is the property of Pearl River Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A series of PAM-co-PDAAM-co-PNIPAM copolymers were synthesized by reversible addition fracture transfer (RAFT) polymerization from acrylamide (AM), diacetone acrylamide (DAAM) and N-isopropylacrylamide (NIPAM). Their structure and composition were characterized by Nuclear Magnetic Resonance (NMR) and Gel Permeation Chromatography (GPC). Hydrogel with pH and temperature dual-response formed by the acyl hydrazone dynamic bonds between ketocarbonyl in polymer and hydrazide in adipic dihydrazide (ADH). The dual-responsive behavior of hydrogels to temperature and pH was researched by rheological measurement, Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FT-IR) spectroscopy. At the same time, the hydrogel demonstrated temperature controlled self-healing properties. Besides, the hydrogels showed pH-and temperature-responsive controlled release behaviors for doxorubicin(Dox). [ABSTRACT FROM AUTHOR]

Copyright of Rare Metal Materials & Engineering is the property of Northwest Institute for Nonferrous Metal Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rare Metal Materials & Engineering is the property of Northwest Institute for Nonferrous Metal Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)