Search

Copyright of Railway Construction Technology is the property of Railway Construction 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 Journal of Atomic & Molecular Physics (1000-0364) is the property of Journal of Atomic & Molecular Physics 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 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 Chinese Journal of Osteoporosis is the property of Chinese Journal of Osteoporosis 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 Osteoporosis is the property of Chinese Journal of Osteoporosis 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 Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao 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 Multipurpose Utilization of Mineral Resources / Kuangchan Zonghe Liyong is the property of Multipurpose Utilization of Mineral Resources 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.)

In order to achieve high-efficiency sulfur fixation in the roasting process of high-sulfur coal gangue, industrial waste boron mud was used as the sulfur fixation agent to conduct sulfur fixation experiments on coal gangue. In view of the deficiency of single factor test, the Box-Behnken response surface method was used to study the effects of sulfur fixation agent dosage, roasting temperature, roasting holding time, etc. on the sulfur fixation rate of coal gangue. The interaction between the factors was clarified. The research results show that when the mass ratio of magnesium in the sulfur-fixaing agent to the sulfur in the coal gangue is 9, with a roasting temperature of 620°C, and a roasting holding time of 100min, the sulfur-fixaing rate of the coal gangue reaches 89.35%.The most influential factor on sulfur fixation in coal gangue is the amount of sulfur fixation, followed by the roasting temperature, while the roasting holding time(within 2h)has little effect. There is a significant interaction between the roasting temperature and the amount of sulfur fixation. The optimized coal gangue sulfur fixation process can provide certain technical support for the resource utilization of high-sulfur coal gangue. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao 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.)

BACKGROUND: Although high tibial osteotomy and unicompartmental knee arthroplasty are often used to treat unicompartmental knee osteoarthritis with varus deformity, whether there are differences in knee function at different postoperative periods and whether there are changes in knee parameters on preoperative and postoperative imaging still need further clinical study. OBJECTIVE: To compare the early clinical efficacy and the differences in knee imaging-related parameters of unicompartmental knee arthroplasty and open-wedge high tibial osteotomy in the treatment of unicompartmental knee osteoarthritis with varus deformity. METHODS: The medical record data of 126 patients with unicompartmental knee osteoarthritis with varus deformity were retrospectively analyzed, including 60 patients undergoing open-wedge high tibial osteotomy and 66 patients undergoing unicompartmental knee osteoarthritis with varus deformity. The Hospital for Special Surgery knee score was used to assess knee function preoperatively, 1 month postoperatively and the late follow-up between the two groups. Long-leg full-weight-bearing radiograph and anteroposterior and lateral radiograph of knee were taken before and after operation. The postoperative hip-knee-ankle angle, tibial posterior slope and patellar height were measured. The differences in the relevant imaging parameters of knee joint were compared between the two groups before and after operation. RESULTS AND CONCLUSION: (1) A total of 53 knees with high tibial osteotomy and 61 knees with unicompartmental knee arthroplasty were included in this study. The overall follow-up time was (26.29±3.84) months. (2) The Hospital for Special Surgery scores were higher in the unicompartmental knee arthroplasty group than those in the high tibial osteotomy group (P < 0.05). At the last follow-up, there was no significant difference in Hospital for Special Surgery scores between the two groups (P > 0.05). (3) Compared with preoperative data in the same group, the hip-knee-ankle angle and tibial posterior slope increased (P < 0.05), but patellar height decreased (P < 0.05) in the high tibial osteotomy group. Compared with preoperative data in the same group, hip-knee-ankle angle increased (P < 0.05), but tibial posterior slope decreased (P < 0.05), patellar height increased in the unicompartmental knee arthroplasty group, but the difference was not significantly different (P > 0.05). (4) Total hip-knee-ankle angle increased from (-5.68±3.48)° preoperatively to (0.69±0.69)° postoperatively. No significant difference was detected in hip-knee-ankle angle, tibial posterior slope and patellar height between the two groups before operation (P > 0.05). Significant differences were found in hip-knee-ankle angle, tibial posterior slope, patellar height, Δ hip-knee-ankle angle (postoperation-preoperation), Δ tibial posterior slope (postoperation-preoperation) and Δ patellar height (postoperation-preoperation) between the two groups after operation (P < 0.05). (5) It is concluded that the two groups of patients obtained satisfactory results in the late follow-up. However, the patients in the unicompartmental knee arthroplasty group had better knee function scores 1 month after surgery compared with the high tibial osteotomy group. In contrast, the high tibial osteotomy group was prone to postoperative patellar baja and increased posterior tibial slope. In the unicompartmental knee arthroplasty group, the patellar height did not change significantly after surgery, but the posterior tibial slope showed a significant decrease. [ABSTRACT FROM AUTHOR]

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 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 Nonferrous Metals (Mineral Processing Section) 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 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 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.)

Magnesite and dolomite are difficult to be separated by flotation because of their similar crystal structure, chemical composition, and dissolution characteristics. The effects of triton X, 100(TX-100) on the flotation of magnesite and dolomite under sodium oleate system were studied by flotation tests, surface tension tests, FTIR tests and XPS tests. The results show that TX-100 can enhance the effect on the flotation separation of magnesite and dolomite by using NaOL. NaOL is chemically adsorbed on the surface of magnesite and dolomite, and may have competitive adsorption with TX-100 on the surface of dolomite. TX-100 reduces the surface tension of NaOL and promotes the dissolution and dispersion of NaOL. The concentration of Ca 2 + needed to produce calcium oleate precipitation is increased by solubilization, which weakens the adsorption of sodium oleate on dolomite surface, thus selectively inhibiting the dolomite. [ABSTRACT FROM AUTHOR]

Copyright of Nonferrous Metals (Mineral Processing Section) 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 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 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.)

BACKGROUND: Total knee arthroplasty is a mature technique for end-stage knee osteoarthritis. The problem of postoperative blood loss has always been a hot issue in clinical discussion. Whether the intramedullar femoral canal is sealed during operation and its effect on blood loss in total knee arthroplasty remain controversial.OBJECTIVE: To evaluate the clinical effect of sealing of intramedullar femoral canal for reducing postoperative blood loss in total knee arthroplasty by meta-analysis.METHODS: English databases such as Cochrane Library, Medline, Embase, PubMed, and Web of science, and Chinese databases such as CBM, VIP, Wan Fang, and CNKI were retrieved for clinical controlled trials concerning whether the intramedullar femoral canal was sealed during total knee arthroplasty. The retrieval time was from database creation to July 2018. The outcome indexes included operation time,24-hour drainage, intraoperative blood loss, 24-, and 72-hour hemoglobin reduction, blood transfusion rate, and complications.RESULTS AND CONCLUSION:(1) Ten articles were included, including 11 clinical controlled trials, involving 1 190 patients(665 cases underwent autologous bone or cement sealing in the intramedullar femoral canal, and 525 cases were not treated with occlusion in the intramedullar femoral canal).(2) The results of meta-analysis showed that sealing of intramedullar femoral canal in total knee arthroplasty reduced the amount of intraoperative blood loss(MD=-16.11, 95%CI=(-23.51,-8.71), P < 0.001), 24-hour drainage(MD=-128.05,95%CI=(-212.06,-44.04), P < 0.001), 24-hour hemoglobin reduction(MD=-0.58, 95%CI=(-1.08, 0.08), P=0.02), blood transfusion rate(OR=0.50, 95%CI=(0.36, 0.68), P < 0.001) and complications(OR=0.44, 95%CI=(0.21, 0.91), P < 0.05). The operation time(P=0.2) and 72-hour hemoglobin reduction(P=0.9) did not differ significantly between groups.(3) These results indicate that based on the existing evidence, sealing of intramedullar femoral canal in total knee arthroplasty can effectively control visible blood loss, reduce drainage, reduce blood transfusion rate and complications, and it is worthy of promotion. [ABSTRACT FROM AUTHOR]

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.)

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 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.)

Flotation behavior of quartz， magnesite and dolomite in the presence of N，N-2 (3-chloride，2-hydroxypropyl)dodecylamine(NCDA) was investigated by flotation experiments. Properties and adsorption mechanism of NCDA were analyzed by zeta potential test， group electronegativity criteria and quantum chemistry calculation. Flotation results showed that， under the natural pH value of ore pulp， while the same dosages of collectors are added， NCDA has better ability to collect quartz than DDA， but the collecting ability of NCDA to magnesite and dolomite is obviously weaker than that of DDA. Results of zeta potential tests showed that NCDA adsorb on quartz surface by electrostatic adsorption and hydrogen-bond interaction. The calculation results of group electronegativity， hydrophile-lipophile balance and frontier molecular orbital energy indicated that NCDA has better collecting and foaming properties than DDA. Meanwhile， it is easier to interact with the quartz surface. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Modern Laboratory Medicine is the property of Journal of Modern Laboratory Medicine 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 Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao 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.)

Immobilization property of sodium diethyl dithiocarbamate (DDTCNa) on Cr3+ and Ni2+ in polluted soil was investigated by column leaching process. Experimental results indicated that good immobilization effect of heavy metals in polluted soil was obtained when DDTCNa was used. Especially, DDTCNa showed better immobilization effect on Cr3+. Immobilization rate of heavy metal increased with the increase of DDTCNa dosage. When DDTCNa dosage was llOg-kg-1, more than 99% of Cr3+ and Ni2+ can be immobilized. Additionally, leaching pH had some effect on immobilization of Cr3+ and Ni2+. With the reducing of leaching pH, immobilization effect of Cr3+ and Ni2+ decreased. However, high immobilization rate of Cr3+ and Ni2+ , which were more than 90% , could also be obtained. And immobilization rate of Cr3+ , which was higher than 99. 68% , decreased slightly with the reduction of leaching pH. The formation of metal sulfide chelating precipitates and the immobilization mechanism were systematically studied by XRD measurements and coordination chemistry analysis. The results showed that four-membered chelating precipitates with the coordination number of 4 and 6, respectively, which were Ni(DDTC) 2 and Cr(DDTC) 3, could be obtained when DDTCNa reacted with the heavy metals. Moreover, the stability of Cr(DDTC) 3 was much better than Ni (DDTC) 2, so better immobilization property of Cr3+ was obtained. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao 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 Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao 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.)