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Copyright of Journal of Ecology & Rural Environment is the property of Journal of Ecology & Rural Environment 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 Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering 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 Polymer Materials Science & Engineering is the property of Sichuan University, Polymer Research 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.)

[Objective] The present paper aimed to study whether UGT198 gene was involved in the regulation of insect resistance of (Nicotiana tabacum) tobacco, and lay a foundation for the future study of UGT198 gene in the regulation of poplar insect resistance. [Method] By analyzing the public transcriptome data, it was found that PtrUGT198 was highly expressed in the transcriptome of poplar responding to insect infestation, and the bioinformatics and evolutionary analysis were conducted. Using 107 poplar as material, UGT198 gene was cloned, overexpression vector was constructed, and overexpression transgenic strain of tobacco was obtained by Agrobacterium mediated transformation. The feeding experiments preliminarily verified whether PtrUGT198 gene participated in the regulation of insect resistance, and analyzed the function of UGT198 gene in the regulation of insect resistance. [Result] The complete ORF region of PtrUGT198 gene was 1440 bp, encoding 479 amino acids, theoretical molecular weight was 53. 14 kDa, and isoelectric point was 5.92, encoding unstable hydrophobic protein. The secondary structure of PtrUGT198 protein consisted of α-helix (41.75%), β-fold (14.61%), β-corner (7.10%) and random curl (36.53%). PtrUGT198 did not have a transmembrane region, which was predicted to be a non-secreted protein, and the phosphorylation of this protein was mainly serine. The results of homologous sequence comparison showed that highly conserved plant secondary product glycosyltransferase (PSPG) motif existed in the C-terminal of PtrUGT198 protein. Phylogenetic tree analysis showed that PtrUGT198 protein was the most closely related to Populus tomentosa, P. alba and P. euphratica in the same genus, followed by a close relationship with tobacco model plants. UGT198 gene of poplar was cloned, pNC-UGT198 gene overexpression vector was constructed, and overexpression transgenic strain of tobacco was obtained. [Conclusion] UGT198 gene was successfully cloned for the first time, and its function of regulating insect resistance was initially analyzed, which provided reference value for further understanding of the mechanism of regulating poplar insect resistance by UGT198. [ABSTRACT FROM AUTHOR]

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.)

Copyright of Journal of Anhui Agricultural Sciences is the property of Journal of Anhui Agricultural Sciences 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 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 Journal of Irrigation & Drainage is the property of Journal of Irrigation & Drainage 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 Mechanical & Electrical Engineering is the property of Mechanical & Electrical Engineering Magazine 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 Shanxi Agricultural Sciences is the property of Shanxi 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 Modern Medicine & Health is the property of Journal of Modern Medicine & Health 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.)

Silica flour is commonly used in oil well cement to prevent the strength retrogression of hardened cement paste at high temperature and high pressure. In this study, a class G cement slurry was mixed with 35% silica flour of different sizes and cured at high temperature and high pressure (240 ℃ and 21 MPa) for 180 d to study the effects of the silica flour particle size on the high temperature mechanical properties of the hardened cement paste. The compressive strength and permeability of the hardened cement paste containing silica flour of different particle sizes were measured, and the hydration products and pore structure were analyzed. It was found that silica flour prevented the strength retrogression of the hardened cement paste at high temperature, and the compressive strength of the hardened cement paste decreased with the decrease of silica flour particle size. Silica flour reduced the permeability of the hardened cement paste. The smaller the particle size of the silica flour, the lower the permeability. The cement slurry mixed with larger particle size silica flour produced longer needle-like xonotlite, which was the main reason why the hardened cemlent paste had high compressive strength. A high temperature and high pressure cement slurry containing 35% 300-mesh silica flour and other additives was used to cement the well DX-11-2 in the Nanhai oilfield. The well cementing operation was smoothly performed, and the 24 h CBL and VDL wireline logging showed that the cementing quality was excellent. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Medical Equipment Journal is the property of Chinese Medical Equipment Journal 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 Practical Oncology Journal is the property of Journal of Practical Oncology 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 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 National University of Defense Technology / Guofang Keji Daxue Xuebao is the property of NUDT Press 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 Xinjiang Agricultural Sciences is the property of Xinjiang Agricultural Sciences 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 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 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 Telecommunication Engineering is the property of Telecommunication 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 Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural 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.)

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory 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: Take use of calibrating periodogram to set calibrating period of the fully automatic biochemical analyzer Olympus Au 640 scientifically. Methods: After the calibration and adjustment of the biochemical analyzer, the quality control sera of the three concentration levels was tested separately every two hours; after 24 hours, the test was taken one time a day, with the total amount of time for 30 days. All the test items will be tested repeatedly four times to get the average data. Take the coefficient of variation of deposition (CV) greater than 1/6 CLIA'88 was taken as the evaluation criterion to draw the calibrating periodogram.Results:The shortest calibrating period of alkaline phosphatase (ALP) L1 is 12 hours one time. Enzyme items are comparatively stable, the calibrating period could reach more than 30 days, quality control sera of low level is necessary, which is beneficial to acquire more accurate calibrating period. Conclusion: Scientific and reasonable establishment of the calibrating period of each test item, together with regular calibration for the testing system of the biochemical analyzer could help to avoid unnecessary calibration and save work time as well as cost to ensure the reliability of the testing results of the chemical testing items. [ABSTRACT FROM AUTHOR]

Objective: The contrastive analysis of the calibrating period between the fully automatic biochemical analyzers Hitachi H7180 and Olympus Au640 was carried out in this experiment. Methods: Under the same condition, after taking the regular calibration and adjustment for the two biochemical analyzers, test the quality control sera of the high, middle and low concentration levels separately every two hours till 24 hours later, then take the test once every 24 hours, with the total amount of time for 30 days. All the test items will be tested repeatedly four times to gain the average data. The calibrating period of this item starts from the fulfillment of the calibration till the cumulative coefficient of variation (CV) goes beyond 1/6 CLIA’88 permissible error. The calibrating period of the different test items from the two biochemical analyzers was obtained by drawing calibrating periodogram, and contrastive analysis of the results was carried out in this experiment. Results: The calibrating periodograms of alkaline phosphatase (ALP) were drawn and contrasted. The results revealed that when the experiment of every testing item was carried out in Hitachi H7180, the calibrating request was fulfilled at first by the low level quality control CV, and at last by the high level quality control CV; while in Olympus Au640, the calibrating request was fulfilled at first by the middle level control CV, and at last by high level quality control CV. Conclusions: Basically, the two fully automatic biochemical analyzers Hitachi H7180 and Olympus Au640 have the same calibrating period, with variation in some individual items. [ABSTRACT FROM AUTHOR]