This article is presenting history of stone casting and analysis of basalt raw materials assessment from other countries for stone casting technology and various basalts compositions were considered. Analytical method...This article is presenting history of stone casting and analysis of basalt raw materials assessment from other countries for stone casting technology and various basalts compositions were considered. Analytical methods for calculating composition of charge require a long calculation time and plotting diagrams, each method has its own advantages and disadvantages. As a research significance, we have proposed an experimental calculation method for calculating raw materials after charging. Analysis of the composition, structure of basalts and charging materials were used in the stone casting technology. According to the comparison method, the required amount of charging materials was calculated for the Suluu-Terek 1, Suluu-Terek 2 and Berestovetsk deposits. The calculated data was confirmed by experimental melts in the process of stone casting.展开更多
目的探讨微通道经皮肾镜取石术(mPCNL)与输尿管软镜钬激光碎石术(FURL)联合治疗完全性铸型肾结石的效果及其对患者机体应激、炎症反应的影响。方法将104例完全性铸型肾结石患者随机分为对照组与研究组,每组52例。对照组行mPCNL治疗,研...目的探讨微通道经皮肾镜取石术(mPCNL)与输尿管软镜钬激光碎石术(FURL)联合治疗完全性铸型肾结石的效果及其对患者机体应激、炎症反应的影响。方法将104例完全性铸型肾结石患者随机分为对照组与研究组,每组52例。对照组行mPCNL治疗,研究组行mPCNL与FURL联合治疗。比较2组患者手术一般情况、结石清除率及并发症发生情况;观察2组术前术后肾功能[尿素氮(BUN)、肌酐(SCr)]、氧化应激[皮质醇(Cor)、丙二醛(MDA)、谷胱过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)]、炎症因子[白介素(IL)-6、C反应蛋白(CRP)、降钙素原(PCT)]指标的变化情况。结果与对照组相比,研究组手术时间、住院时间及结石清除率显著增加(P<0.05)。2组术前术后BUN、Scr水平比较差异无统计学意义(P>0.05)。与术前相比,2组术后24、48 h Cor、MDA水平显著升高(P<0.05),GSH-Px、SOD水平显著降低(P<0.05);与对照组术后各时点比较,研究组Cor、MDA水平显著降低(P<0.05),GSH-Px、SOD水平显著升高(P<0.05)。2组术后2 h IL-6水平均较术前显著升高(P<0.05),术后12 h IL-6水平与术前比较差异无统计学意义(P>0.05);研究组术后2 h IL-6水平显著低于对照组(P<0.05)。与术前相比,2组术后2、12 h PCT水平均显著升高(P<0.05);但研究组术后各时点PCT水平显著低于对照组(P<0.05)。与术前相比,2组术后24、48 h CRP水平显著升高;但研究组术后各时点CRP水平显著低于对照组(P<0.05)。结论mPCNL联合FURL治疗完全性铸型肾结石疗效确切,虽然延长了手术时间,但结石清除率显著增加,且不增加患者肾功能及机体应激与炎症反应程度,有利于术后恢复。展开更多
This research presents an attempt of using wastewater from stone slurry waste in production of concrete. Several concrete mixtures were prepared by using tap water and stone slurry wastewater at different w/c ratios a...This research presents an attempt of using wastewater from stone slurry waste in production of concrete. Several concrete mixtures were prepared by using tap water and stone slurry wastewater at different w/c ratios and replacement ratios of wastewater in substitute of tap water. Testing of concrete samples included slump, compressive strength, flexural strength and absorption. Test results showed reduction of workability (slump) at all w/c ratios and replacement ratios. The maximum compressive strength didn’t change significantly at w/c = 0.7 and 28 days of curing compared with compressive strength at w/c = 0.5 and 0.6. From linear regression of the experimental results, the results showed that at 20% replacement ratio of tap water with wastewater, the reduction in compressive strength was insignificant (not greater than 10% to 15%). Test results showed varying reduction of absorption at different w/c and replacement ratios, up to 62% at w/c = 0.5.展开更多
文摘This article is presenting history of stone casting and analysis of basalt raw materials assessment from other countries for stone casting technology and various basalts compositions were considered. Analytical methods for calculating composition of charge require a long calculation time and plotting diagrams, each method has its own advantages and disadvantages. As a research significance, we have proposed an experimental calculation method for calculating raw materials after charging. Analysis of the composition, structure of basalts and charging materials were used in the stone casting technology. According to the comparison method, the required amount of charging materials was calculated for the Suluu-Terek 1, Suluu-Terek 2 and Berestovetsk deposits. The calculated data was confirmed by experimental melts in the process of stone casting.
文摘目的探讨微通道经皮肾镜取石术(mPCNL)与输尿管软镜钬激光碎石术(FURL)联合治疗完全性铸型肾结石的效果及其对患者机体应激、炎症反应的影响。方法将104例完全性铸型肾结石患者随机分为对照组与研究组,每组52例。对照组行mPCNL治疗,研究组行mPCNL与FURL联合治疗。比较2组患者手术一般情况、结石清除率及并发症发生情况;观察2组术前术后肾功能[尿素氮(BUN)、肌酐(SCr)]、氧化应激[皮质醇(Cor)、丙二醛(MDA)、谷胱过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)]、炎症因子[白介素(IL)-6、C反应蛋白(CRP)、降钙素原(PCT)]指标的变化情况。结果与对照组相比,研究组手术时间、住院时间及结石清除率显著增加(P<0.05)。2组术前术后BUN、Scr水平比较差异无统计学意义(P>0.05)。与术前相比,2组术后24、48 h Cor、MDA水平显著升高(P<0.05),GSH-Px、SOD水平显著降低(P<0.05);与对照组术后各时点比较,研究组Cor、MDA水平显著降低(P<0.05),GSH-Px、SOD水平显著升高(P<0.05)。2组术后2 h IL-6水平均较术前显著升高(P<0.05),术后12 h IL-6水平与术前比较差异无统计学意义(P>0.05);研究组术后2 h IL-6水平显著低于对照组(P<0.05)。与术前相比,2组术后2、12 h PCT水平均显著升高(P<0.05);但研究组术后各时点PCT水平显著低于对照组(P<0.05)。与术前相比,2组术后24、48 h CRP水平显著升高;但研究组术后各时点CRP水平显著低于对照组(P<0.05)。结论mPCNL联合FURL治疗完全性铸型肾结石疗效确切,虽然延长了手术时间,但结石清除率显著增加,且不增加患者肾功能及机体应激与炎症反应程度,有利于术后恢复。
文摘This research presents an attempt of using wastewater from stone slurry waste in production of concrete. Several concrete mixtures were prepared by using tap water and stone slurry wastewater at different w/c ratios and replacement ratios of wastewater in substitute of tap water. Testing of concrete samples included slump, compressive strength, flexural strength and absorption. Test results showed reduction of workability (slump) at all w/c ratios and replacement ratios. The maximum compressive strength didn’t change significantly at w/c = 0.7 and 28 days of curing compared with compressive strength at w/c = 0.5 and 0.6. From linear regression of the experimental results, the results showed that at 20% replacement ratio of tap water with wastewater, the reduction in compressive strength was insignificant (not greater than 10% to 15%). Test results showed varying reduction of absorption at different w/c and replacement ratios, up to 62% at w/c = 0.5.
