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为了促进琉璃苣籽油的开发利用，以琉璃苣籽为原料，采用亚临界丁烷萃取琉璃苣籽油，通过单因素实验研究液料比、萃取温度、萃取时间对琉璃苣籽油萃取率的影响，通过响应面实验对琉璃苣籽油萃取工艺条件进行优化，并对最佳条件下萃取的琉璃苣籽油脂肪酸组成进行分析。将SD大鼠平均分成5组，对照组不进行训练，剩余4组进行力竭运动训练，低、中、高剂量组每日灌胃10、15、20 mg/g琉璃苣籽油，力竭运动组每日灌胃15 mg/g蒸馏水，对照组正常饮水，实验结束后测定大鼠骨骼肌中抗氧化酶活性，考察琉璃苣籽油对力竭运动大鼠骨骼肌抗氧化酶活性的影响。结果表明：琉璃苣籽油最佳萃取工艺条件为液料比6.2∶ 1、萃取温度41 ℃、萃取时间53 min，在该条件下琉璃苣籽油萃取率为35.32%；琉璃苣籽油中不饱和脂肪酸含量为85.51%；琉璃苣籽油可以恢复骨骼肌中超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)的活性，降低骨骼肌中丙二醛(MDA)含量。琉璃苣籽油可以提高力竭运动大鼠骨骼肌抗氧化酶活性，提高机体清除自由基的能力，减少对机体细胞的损伤。 In order to promote the development and utilization of borage seed oil, taking borage seed as raw material, the borage seed oil was extracted with the subcritical butane extraction method. The effects of liquid-material ratio, extraction temperature and extraction time on the extraction rate of borage seed oil were studied by single factor experiment. The extraction conditions of borage seed oil were optimized by response surface methodology. The fatty acid composition of the borage seed oil was analyzed. In addition, SD rats were divided into five groups on average. The control group did not receive training, and the remaining four groups received exhaustive exercise training. The low, medium and high dose groups were gavaged with 10, 15 mg/g and 20 mg/g borage seed oil every day, the exhaustive exercise group was gavaged with 15 mg/g distilled water every day, and the control group drank water normally. After the experiment, the activity of antioxidant enzymes in the skeletal muscle of the rats was determined to investigate the effect of borage seed oil on the activity of antioxidant enzymes in the skeletal muscle of exhausted exercise rats. The results showed that the optimum extraction conditions of borage seed oil were as follows: liquid-material ratio 6.2∶ 1, extraction temperature 41 ℃, extraction time 53 min. Under these conditions, the extraction rate of borage seed oil was 35.32%. The content of unsaturated fatty acids in borage seed oil was 85.51%. The borage seed oil could restore the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) in skeletal muscle, and reduce the content of malondialdehyde (MDA) in skeletal muscle. Borage seed oil can increase the activity of antioxidant enzymes in skeletal muscle of exhausted exercise rats, improve the body′s ability to scavenge free radicals and reduce the damage to body cells.

文章作者完成了一种基于自适应差分脉冲编码调制（ADPCM）技术的合成语音芯片的研究与设计,首先将压缩的ADPCM格式的语音信号进行解码,然后利用脉冲宽度调制（PWM）技术将解码后的信号转化为PWM波,直接驱动喇叭发出声音。与传统的采用权电流数/模转换进行合成语音输出的方式相比,该语音输出方式具有输出功耗小、工艺适应能力强和设计稳定可靠等优点。

Copyright of Plastics Science & Technology / Suliao Ke-Ji is the property of Plastics Science & Technology 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 Mechanical & Electronic Control Engineering is the property of Omniscient Pte. Ltd. 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 fatigue crack growth rate of TA15 titanium alloy was measured by laser deposition using standard CT samples, and the fatigue crack growth mechanism was analyzed by combining the microstructure, crack propagation path and fracture morphology. Based on the method of ABAQUS and FRANC 3D co simulation, the stress intensity factor of the crack tip was simulated and the life prediction was carried out. The results show that the crack propagation rate of the laser deposition manufacturing state is lower than that of the forging state, and the crack passes mainly through the lamellar a phase, and a small amount propagates along the at, and the fatigue fringes are clearly visible in the stable propagation zone, accompanied by a large number of secondary cracks, and the instantaneous fracture zone is a typical ductile fracture* On the other hand, the stress intensity factor calculated by ABAQUS and FRANC 3D co simulation is in good agreement with the theoretical value, and the relative error of the predicted life is less than 5%, which confirms the conservatism of the prediction results, verifies the reliability of the simulation analysis, and ensures the safety in engineering applications. [ABSTRACT FROM AUTHOR]

Copyright of Nonferrous Metals Engineering is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Nonferrous Metals Engineering is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department 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 China Condiment is the property of China Condiment 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 Science Technology & Engineering is the property of Chinese Society of Technology Economics 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 mechanical properties of laser additive manufacturing of titanium alloy components under room temperature and high temperature conditions are important to the application of aero engines in complex service environments. Therefore, the Ti65 titanium alloy specimen was prepared by laser deposition manufacturing technology. The tensile properties and fracture morphology ol the horizontal and vertical sampling direction samples under room temperature and high temperature conditions were analyzed, which provided a scientific basis for the mechanical properties of laser deposition Ti65 titanium alloy in a wide temperature range. The results show that under room temperature and high temperature conditions, the horizontal specimen has high strength and low plasticity, while the vertical direction sample has low strength and high plasticity, mainly because ol the number of grain boundaries in the horizontal direction is large, and the grain boundaries effectively hinder the slip movement, leading to an increase in strength and a decrease in plasticity. Under high temperature conditions, the tensile strength and yield strength ol specimens in dilierent sampling directions showed a decreasing trend with the increase ol test temperature, and the elongation showed an increasing trend. Because high temperatures increase atomic kinetic energy, the resistance to dislocation motion decreases. Fracture observation shows that the Iracture methods ol horizontal specimens and vertical specimens at room temperature are brittle Iracture and quasi-cleavage Iracture, respectively, and all samples are ductile fractures at high temperature. [ABSTRACT FROM AUTHOR]

Copyright of Industrial Water Treatment is the property of CNOOC Tianjin Chemical Research & Design Institute 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 Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal 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 Nonferrous Metals Engineering is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry 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 Journal of Dalian University of Technology / Dalian Ligong Daxue Xuebao is the property of Journal of Dalian University of Technology 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 Jilin University (Science Edition) / Jilin Daxue Xuebao (Lixue Ban) is the property of Zhongguo Xue shu qi Kan (Guang Pan Ban) Dian zi Za zhi She 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 Yellow River is the property of Editorial Board of Yellow River 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 China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS 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.)

Objective To evaluate the effect of erythropoietin (EPO) on the proliferation and migration of bone marrow mesenchymal stem cell (BMSC) in rats. Methods The 5th generation BMSCs were divided into the control (without EPO) and 10, 100, 500, 1 000 IU/mL EPO groups. After 24 h and 48 h of culture, the proliferation rate, migration ability and the expression levels of CXCR4 of BMSCs were detected in each group. The 5th generation BMSCs were further divided into BMSC and EPO-BMSC groups. After 48 h of culture, the effect of EPO upon surface markers, directional differentiation and cytoskeleton morphology of BMSCs were evaluated in both groups. Results After the co-culture of EPO and BMSCs for 48 h, the proliferation rate and migration ability of BMSCs were significantly enhanced, and the expression level of CXCR4 protein was significantly up-regulated in the 100 IU/mL and 500 IU/mL EPO groups compared with those in the control group (all P<0.05). However, EPO exerted no effect upon the expression levels of surface markers and directional differentiation ability of BMSCs in the EPO-BMSC group. In the EPO-BMSC group, the fibrous skeleton of most BMSCs was arranged along the long axis in parallel. Conclusions EPO can improve the proliferation rate, migration ability and tissue repair capability of BMSCs, probably by promoting the directional homing of BMSCs to injured organs and tissues via up-regulating the expression level of CXCR4. [ABSTRACT FROM AUTHOR]

KF/ZnO catalyst was prepared by impregnation and caleination with potassium fluoride as impregnating component and zinc oxide as carrier. The effect of preparation conditions on the methanolysis activity of castor oil of the catalyst was investigated by orthogonal test. The optimized preparation conditions of the KF/ZnO catalyst were found as follows: the mass fraction of KF aqueous solution is 20%, the drying temperature is 150°C, the calcination temperature is 450°C and the calcination time is 5h. The catalyst prepared under optimized conditions is used for methanolysis of castor oil to produce biodiesel, and the conversion rate of castor oil can reach 87.9%. The KF/ZnO catalyst prepared under optimized conditions was characterized by modern characterization techniques. The results show that the KF/ZnO catalyst is composed of supported ZnO crystals and KF and reaction products dispersed in a single layer on the surface. The specific surface area of the catalyst is 8.22 m²/g, the pore volume is 0.0191 cm³/g, the surface morphology is porous cloud, and the alkali strength is in the range of 7.2 to 15.0 [ABSTRACT FROM AUTHOR]

Copyright of Chemical Engineering of Oil & Gas / Shi You Yu Tian Ran Qi Hua Gong is the property of PetroChina Southwest Oil & Gas Field Company 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.)