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Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering 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 Soil & Water Conservation (1009-2242) is the property of Institute of Soil & Water Conservation 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 Food Research & Development is the property of Food Research & Development 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 Journal of Soil & Water Conservation (1009-2242) is the property of Institute of Soil & Water Conservation 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 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.)

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.)

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.)

Copyright of Journal of Chongqing University of Technology (Natural Science) is the property of Chongqing 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 Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) 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 Bulletin of Soil & Water Conservation is the property of Bulletin of Soil & Water Conservation 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 Coal Science & Technology (0253-2336) is the property of Coal Science & 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.)

In order to reduce soil erosion and improve ecological environment, the Chinese government implemented the Grain for Green Project in 1999, in which numerous croplands were converted to grasslands, forestlands, or free land for natural plant succession. The ecological construction not only significantly changes the vegetation cover conditions of the watershed, but also changes the hydrological processes of the watershed. In order to understand the changes of ecological and hydrological processes under different ecological construction conditions, 414 water samples were collected in the governance river basin of Jiuyuangou Watershed and 300 water samples were collected in the natural river basin of Peijiamao Watershed, which are sub basins of Wuding River. The water samples included precipitation, river water, well water, reservoir water and snow water. Each water samples had three replicates. Based on stable isotope technology, the hydrogen and oxygen isotope characteristics were analyzed in different water samples. The effects of ecological construction on water transmission process and transformation characteristics between different water bodies in different seasons were also evaluated in this research. The results showed that the amplitude of precipitation isotope values were greater than the river water and well water isotope values. In addition, the river water and reservoir water had stronger evaporation fractionation than other water samples and well water was relatively stable. The local meteoric water line was δD=7.09δ18O+1.29 in the governance river basin of Jiuyuangou watershed and δD=6.71δ18O-3.25 in the natural river basin of Peijiamao watershed. The slope and intercept of the local meteoric water line in Jiuyuangou watershed was greater than that in Peijiamao watershed. The water supply source of river water, well water and reservoir water were mostly from precipitation. At the same time, precipitation and snow water had similar sources. During the dry season (from December to June), the temperature was low and during the wet season (from July to November), it was high, and the precipitation was mainly distributed in June to November. The isotope values were low in the wet season, and dry season isotope values were high. The isotope values were positively correlated with the precipitation, and negatively correlated with the temperature. The isotope values of river water and well water showed a similar trend of variation, which became enrichment with the main channel flow. The oxygen isotope value was used to calculate the supply ratio of precipitation, river water and well water in dry season and wet season. In dry season, precipitation and well water supplied river water, and the supply ratio was 24.66%, 75.34% and 83.81%, 16.19%, respectively. In wet season, well water was supplied by precipitation and river water, and the supply ratio was 14.75%, 85.25% and 48.06%, 51.94%, respectively. Ecological construction had significantly changed the ecological and hydrological processes. The acceleration of ecological construction had a significant impact on the transformation of different water bodies in the river basin of Loess Plateau. The present research could provide technical support and theoretic foundation for the study of ecological and hydrological processes and ecological environment protection on the Loess Plateau. [ABSTRACT FROM AUTHOR]

Copyright of Acta Agronomica Sinica is the property of Crop Science Society of China 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 Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering 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.)

Based on the concept of security, America DuPont Co introduced the status of the safety management. The ten concepts of DuPont safety management were used to compare the laboratory management of our school. The weak link in current safety management of university laboratories was analyzed. It pointed out that the college laboratory safety process should strengthen the construction of laboratory safety and security system. The authors put forward " four guarantee and one reduction - according to the principle of safety system engineering. Improving leadership for every layer is the guarantee of laboratory safety organization; laboratory management team with high quality is the guarantee of laboratory safety personnel to ensure the construction of dangerous chemicals; full life cycle tracking management system is the guarantee of key laboratory the essence of security; campus safety culture is the guarantee of the external environment of laboratory safety; accident emergency plan feasible is an effective method to reduce the laboratory safety accident loss. Through the above comparative analysis $ the formation of a specific pattern of the safety management in laboratory has a certain theoretical and practical significance to the essence of safety management of laboratory in colleges and universities. [ABSTRACT FROM AUTHOR]