| 1 | Study on corrosion resistance of rust-preventive oil under shipment and storage conditions显示文摘In recent decades,the demand for cold-rolled steel sheets has remarkably increased. To prevent the sheets from rusting before the manufacturing process,a layer of rust-preventive oil has to be coated on the sheets. In this study,the shipment and storage environments were simulated through a salt spray test and a damp-heat experiment,respectively,and the packaging status of the sheets was imitated by a laminated sheet test. The protection effect of oil on the steel sheet was investigated under the different environmental conditions and oil weights by using electrochemical approaches,scanning electron microscopy( SEM),and X-ray diffraction( XRD) techniques. It was found that chloride ions had more severe effects on the corrosion resistance of the oils than hydrothermal conditions did. This was shown in the sheets with oil weights of 0. 4,0. 9,and 1. 2 g·m^(-2),which were too severely corroded after a four-hour salt spraying test to meet the demands of subsequent processing. However,the sheets showed satisfactory corrosion resistance after a three-week damp-heat experiment with a temperature of 49 ℃ and 95% RH. In addition,it was disclosed that the penetration of the chloride ions determined the protection mechanism of the oil,i. e.,the corrosion resistance was initially enhanced by the increase in the oil content. As long as the chloride ion reached the interface between the oil film and the sheet,the oil distribution became the predominant factor in the protection of the sheet. The corrosion mechanism of the steel sheet was dependent on the stacking style of the sample. When exposed to air,the corrosion product of the sample was rust red with a composition of Fe_2O_3,whereas the black product that is mainly composed of Fe_3O_4 was found on the edge of the laminated sheets,which resulted from the oxygen concentration cell. | FANG Baiyou LU Lin DING Minzhen LI Xiaogang | 2015 | Baosteel Technical Research2015，9，1： | 4 |
| 2 | Efficacy of electroacupuncture on myocardial protection and postoperative rehabilitation in patients undergoing cardiac surgery with cardiopulmonary bypass:a systematic review and Meta-analysis显示文摘OBJECTIVE:To evaluate the efficacy of electroacupuncture(EA)intervention on myocardial protection and postoperative rehabilitation in patients undergoing cardiac surgery with cardiopulmonary bypass(CPB).METHODS:Eight databases,including Pub Med,Embase,the Cochrane Library,Web of Science,Chinese Bio Medical Literature Database,China National Knowledge Infrastructure Database,Wanfang Data,China Science and Technology Journal Database,and two clinical trial registries,were searched.All randomized controlled trials(RCTs)related to EA intervention in cardiac surgery with CPB were collected.Based on the inclusion and exclusion criteria,two researchers independently screened articles and extracted data.After the quality evaluation,RevMan 5.3 software was used for analysis.RESULTS:Fourteen RCTs involving 836 patients were included.Compared with the control treatment,EA significantly increased the incidence of cardiac automatic rebeat after aortic unclamping[relative risk(RR)=1.15,95%confidence interval(CI)(1.01,1.31),P<0.05;moderate].Twenty-four hours after aortic unclamping,EA significantly increased the superoxide dismutase[standardized mean difference(SMD)=0.96,95%CI(0.32,1.61),P<0.05;low],and interleukin(IL)-2[SMD=1.33,95%CI(0.19,2.47),P<0.05;very low]expression levels and decreased the malondialdehyde[SMD=-1.62,95%CI(-2.15,-1.09),P<0.05;moderate],tumour necrosis factor-α[SMD=-1.28,95%CI(-2.37,-0.19),P<0.05;moderate],and cardiac troponin I[SMD=-1.09,95%CI(-1.85,-0.32),P<0.05;low]expression levels as well as the inotrope scores[SMD=-0.77,95%CI(-1.22,-0.31),P<0.05;high].There was no difference in IL-6 and IL-10 expression levels.The amount of intraoperative sedative[SMD=-0.31,95%CI(-0.54,-0.09),P<0.05;moderate]and opioid analgesic[SMD=-0.96,95%CI(-1.53,-0.38),P<0.05;low]medication was significantly lower in the EA group than in the control group.Moreover,the postoperative tracheal intubation time[SMD=-0.92,95%CI(-1.40,-0.45),P<0.05;low]and intensive care unit stay[SMD=-1.71,95%CI(-3.06,-0.36),P<0.05;low]were significantly shorter in the EA group than in the control group.There were no differences in the time to get out of bed for the first time,total days of antibiotic use after surgery,or postoperative hospital stay.No adverse reactions related to EA were reported in any of the included studies.CONCLUSIONS:In cardiac surgery with CPB,EA may be a safe and effective strategy to reduce myocardial ischaemia-reperfusion injury and speed up the recovery of patients after surgery.These findings must be interpreted with caution,as most of the evidence was of low or moderate quality.More RCTs with larger sample sizes and higher quality are needed to provide more convincing evidence. | QIN Xiaoyu WANG Chunai XUE Jianjun ZHANG Jie LU Xiaoting DING Shengshuang GE Long WANG Minzhen | 2024 | Journal of Traditional Chinese Medicine2024，44，1： | 0 |
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