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The nano-selenium synthesized by Lactobacillus plantarum LP21 is easy to adhere to the surface of the bacteria and is difficult to separate and extract. In this study, under the premise of maintaining the integrity of the cells structure, the nano-selenium attached to the bacteria was dispersed. The effects of ultrasound.organic solvents and surfactants on the dispersion of nano-selenium were investigated by single factor experiments. The optimal dispersion conditions were determined through orthogonal experiments. Finally, sucrose density gradient and microporous filter membrane filtration were used to separate and purify nano selenium. The results of single factor showed that ultrasonic.organic solvent and surfactant all had dispersion effect among which surfactant SDS had the best effect. The optimum dispersion conditions were determined by orthogonal method to be the addition of 2.5% SDS and 1.5% n-hexanol, and the ultrasonic treatment time was 25 minutes. Separation and purification using 50%, 60%, and 70% sucrose density gradient centrifugation followed by 0. 22 µm water-based microporous filter membrane filtration to obtain pure nano-selenium. The particles were evenly distributed and the average particle size was 165.88±35.35 nm. This study provides a reference for the separation and preparation of nano-selenium from microbial sources. [ABSTRACT FROM AUTHOR]

Copyright of Urban Mass Transit is the property of Urban Mass Transit 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 Science & Technology of Food Industry is the property of Science & Technology of Food Industry 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 Computer-Aided Design & Computer Graphics / Jisuanji Fuzhu Sheji Yu Tuxingxue Xuebao is the property of Gai Kan Bian Wei Hui 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】In order to provide scientific basis for the optimization of intercropping patterns and the management of intercropping under rubber plantations in the future, the effects of different intercropping patterns on the functional diversity of soil microbial communities in mature rubber plantations were studied. 【Method】Biolog-ECO technology was used to study the characteristics of soil microbial functional diversity, and the differences of soil microbial metabolic activity and diversity on carbon sources in different intercropping plantations were analyzed. 【Result】Soil microbial carbon utilization was stable at 216 hours, and the average light absorption value AWCD of different treatments was in the order of rubber-kinggrass intercropping＞rubber-coffee intercropping＞rubber-puzzle intercropping＞rubber.The intercropping pattern not only increased the types of carbon sources utilized by soil microorganisms, but also enhanced the metabolic activity of carbon sources.The metabolic capacity of soil microorganisms to carbohydrates, amino acids, phenolic acids, carboxylic acids and polymers was the strongest in rubber-kinggrass intercropping, and the metabolic capacity of amines was the strongest in rubber-coffee intercropping.There were significant differences in soil microbial carbon source utilization between intercropping patterns and rubber plantation by PCA （principal component analysis), significant differences between rubber-kinggrass and rubber-coffee, rubber-puzzle, but no significant differences between rubber-coffee and rubber-puzzle intercropping.The research showed that different intercropping modes could improve the soil microbial diversity index, and there were significant differences in AWCD value and McIntosh index among different treatments, but no significant differences in Shannon index and Simpson index.Correlation analysis showed that the metabolic function of soil microbial carbon source was closely related to soil environmental factors, and soil water content, pH and organic matter were the main factors affecting the differences of soil carbon source metabolism. 【Conclusion】Intercropping for kinggrass, puzzle and coffee can improve soil ecological environment, promote the utilization of soil carbon sources, and enhance the functional diversity of soil microbial community in rubber plantation. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Vibration, Measurement & Diagnosis is the property of Nanjing Hangkong Daxue 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 Uranium Mining & Metallurgy is the property of Uranium Mining & Metallurgy 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 Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu 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 Drilling Fluid & Completion Fluid is the property of Drilling Fluid & Completion Fluid 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 Feed Research is the property of Editorial Board of Feed 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.)

In order to study the repair method of reflective cracks in asphalt pavement, three kinds of structural repair materials were designed according to the width of reflective cracks. Firstly, the high-temperature stability, low-temperature crack resistance and water stability of the repair materials were evaluated by rutting test, bending trabecular test, immersion Marshall test and freeze-thaw splitting test respectively. Secondly, the optimum distribution amount of binder was determined by drawing strength test and shear strength test. Finally, the crack resistance of the repaired structure was discussed through the theory of full field strain analysis and fracture energy. The research results show that the basic properties of the three kinds of repair materials designed in the test meet the requirements of the specification. The optimal distribution amount of binder for V-shaped repair structure is 0. 6 kg/m². Through the full field strain analysis and crack resistance analysis, it is known that the flexural tensile strength of the repair material is 3. 36 times that of the traditional asphalt pouring repair, and the fracture energy of the repair material reaches 60. 1% of that of the uncracked pavement. The test verifies the feasibility of repairing road reflection crack with V-shaped, and provides a new method for repairing road reflection crack. [ABSTRACT FROM AUTHOR]

Copyright of Evaluation & Analysis of Drug-Use in Hospitals of China is the property of Evaluation & Analysis of Drug-Use in Hospitals of China Editorial Board 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 Oil Crop Sciences is the property of Oil Crops Research Institute of Chinese Academy of Agricultural Sciences 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 Tiangong University is the property of Journal of Tianjin Polytechnic University 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】 This study was conducted to explore the characteristics of soil physial chemical and microbes properties, and their correlation relationships with four different soil parent materials （granite, basalt, metamorphic rock and shallow marine deposit） from rubber plantations in Hainan Island to provide the basis for soil quality management. 【Method】 By means of investigation and sampling, correlation analysis, redundancy analysis and other statistical methods, 13 physical and chemical indexes, such as soil water content, organic carbon, microbial carbon and other microbial indexes of rubber plantation under different parent material conditions were studied. 【Result】 There were significant differences in soil physicochemical properties and soil microbial community among different soil parent materials from rubber plantations, and the basalt was superior to the others three parent materials. The comprehensive comparison of soil fertility was as follows as basalt（1.90）> shallow sea sediment（1.88）> metamorphic rock（1.59）> granite（-5.37）. The soil MBN, MBC, water content and soil temperature were main influencing factors for soil fertility in different parent materials by PCA （principal component analysis）. In addition, soil microbes was significantly correlated with the physical and chemical properties, which of main factors were soil water content, pH, total potassium, temperature, total phosphorus and available nitrogen by RDA （redundancy analysis）. 【Conclusion】 The above results suggested that there was very close relationship between soil microbes and soil physicochemical properties, and different impact factors for soil fertility among different typical parent materials. Therefore, the variation characteristics and relationship between soil microbes with soil physicochemical properties in the research process of evaluation and management of soil quality in rubber plantation under different parent materials and other farming conditions must be considered in rubber plantations. [ABSTRACT FROM AUTHOR]

Copyright of China Brewing is the property of China Brewing 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.)

The switchgear is important for power equipment in substation, switch cabinet contact and serious heating temperature are difficult to be accurately detected. After comparison and analysis of the current commonly used temperature measurement technology, the paper designs a high voltage switch cabinet and warning system with threshold warning function based on optical fiber temperature measurement. In the system, intelligent diagnosis and early warning module is the core, the measured point temperature is detected, at the same time, the detection results are compared with historical data. When the contact temperature and its variation are close to or exceed the warning thresholds, the system will automatically alarm. The test results show that the system has high temperature measurement accuracy, can be used for on-line monitoring and early warning switch cabinet temperature. It is helpful for staff to control the real-time operating state of the switch cabinet, timely detect and treat hidden fault, hence it provides a basis for the safe operation of switchgear. [ABSTRACT FROM AUTHOR]

Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers 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 maillard reaction of banana, pineapple, strawberry extracts reacting with Gly-Glu dipeptide was selected, reaction solution was 85% 1,2-propylene glycol water (40 mL), reaction temperature 130 °C, reaction time 4 h and the quality of fruit extract and dipeptide were 6. 75 g,0. 55 g. The volatile compounds in the reaction product were analyzed by GC-MS and the reaction products were added into cigarette casing. The results showed that: 1 ) Three kinds of reaction products mainly identified 31 kinds of aroma components, including 7 kinds of esters, 11 kinds of nitrogen heterocyclics, 9 kinds of oxygen heterocyclics, 2 kinds of acids and 2 kinds of other compounds. 2 ) All of the Maillard reaction flavors imparted more burnt-sweetness and coke aroma, while the characteristics of fruit aroma were retained in banana and strawberry extract Maillard reaction flavors, but broken in pineapple extract Maillard reaction flavor. 3 ) Banana and strawberry extract Maillard reaction flavors could improve sweetness and taste of cigarette obviously, which belong to the better application effect of burnt-sweetness flavors. [ABSTRACT FROM AUTHOR]

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine 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 Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine 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 Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine 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 Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine 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.)