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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.)

Copyright of Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society 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 Mine Automation is the property of Industry & Mine Automation 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 Coal Geology & Exploration is the property of Xian Research Institute of China Coal 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.)

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.)

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.)

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology 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 investigate the local application of Cervitec gel and clean curettage in gingival microflora of periodontitis. Methods: 60 Patients with periodontitis were selected and divided into control group and experimental group. The control group were treated by traditional clean shave. The experiment group were treated on the base of the control group with cervitec gel was applied to the teeth and periodontal pocket. Oral health index, probe and gingival fluid levels, bacterial group inhibition and major bacterial killing levels of the changes were compared by statistical software SPSS 17.0. Results: Compared with the control group, the effect of oral index, gingival level and bacterial flora in patients of experimental group were more obviously inhibited. The performance were plaque index, gingival index (GI), bleeding index was decreased significantly (P<0.05); the probing depth, attachment level, gingival crevicular fluid content was decreased significantly (P<0.05); the total bacteria, gram negative and gram positive bacteria group was greatly inhibited (P<0.05); the level of Streptococcus Gordon, slow Streptococcus disease, black Prevotella, Porphyromonas gingivalis cell killing bacteria was significantly increased (P < 0.05). Conclusions: Local application of gel combined with clean curettage can effectively inhibit gingival microflora and maintain long-term efficacy, reduce irritation and allergies, improve the clinical efficiency, protect gum health, and produce smaller side effects for teeth. [ABSTRACT FROM AUTHOR]

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.)

Using Split Hopkinson Pressure Bar (SHPB) experimental system, the experiments on the failure characteristics of coal samples taken from Weiding coal mine under impact loading were carried out. Then the coal dynamic mechanical properties were analyzed in detail. According to the experimental data, it is clear that coal is a typical rate-depended material. Moreover, both the coal elastic modulus and compressive strength increase with the strain rate increases. Besides, a strength statistical damage constitutive model of coal was built based on the strength theory and statistical damage theory, a method to determine the model parameters was proposed,and the model correctness was verified by the testing data.The model is proved to be accurate and reasonable compared with the component statistical damage constitutive model. The research results show that the strength statistical damage constitutive model not only can effectively describe the coal dynamic mechanical properties, but also has several advantages, such as simple construction, few parameters and clear physics meaning. Therefore, the model with high relevance is more suitable and universal to describe the coal dynamic mechanical properties than the component statistical damage constitutive model. [ABSTRACT FROM AUTHOR]