Macroporous weak basic anion exchanger （D301R） was used to remove organic substances from drilling wastewater. The effect of pH, temperature and contact time on adsorption behavior was investigated in batch experime...Macroporous weak basic anion exchanger （D301R） was used to remove organic substances from drilling wastewater. The effect of pH, temperature and contact time on adsorption behavior was investigated in batch experiments, which indicated that the COD （Chemical Oxygen Demand） removal ratio of drilling wastewater was approximately 90%, and the COD of treated wastewater was below 70 mg/L under appropriate operating conditions. A mixed liquor of NaOH and NaCI was selected as desorbent because of its better elution performance. The results of column dynamic adsorption and regeneration showed that the COD of wastewater could be efficiently removed by D301R resin, and the resin was easily regenerated by the selected desorbent.展开更多
目的评估新癀片糊剂联合牙周基础治疗对慢性牙周炎临床疗效。方法选取我科2022年4月至2023年6月门诊收治的慢性牙周炎患者120例,依据随机数字表法分为对照组、观察组,各60例。对照组在牙周基础治疗龈下刮治操作后,用双氧水冲洗,放置碘...目的评估新癀片糊剂联合牙周基础治疗对慢性牙周炎临床疗效。方法选取我科2022年4月至2023年6月门诊收治的慢性牙周炎患者120例,依据随机数字表法分为对照组、观察组,各60例。对照组在牙周基础治疗龈下刮治操作后,用双氧水冲洗,放置碘甘油于牙周袋内;观察组在牙周基础治疗龈下刮治操作后,用双氧水冲洗,放置新癀片糊剂于牙周袋内。统计分析两组牙周指数、术后24 h VRS评分、临床疗效。结果两组患者龈下刮治术前的PD、BI、GI、BOP、AL、牙齿松动度之间的差异无统计学意义(P>0.05),龈下刮治术后3个月、6个月,观察组患者的PD、BI、GI、BOP、AL、牙齿松动度均低于对照组(P<0.05)。观察组患者的术后24 h VRS评分低于对照组(P<0.05)。观察组患者的总有效率高于对照组(P<0.05)。结论新癀片糊剂联合牙周基础治疗能更加有效地杀灭牙周致病菌,减轻患者治疗后的疼痛,促进牙周组织的愈合。展开更多
In this paper, a disease transmission model with two treatment stages is proposed and analyzed. The results indicate that the basic reproduction number is a critical threshold for the prevalence of the disease. If the...In this paper, a disease transmission model with two treatment stages is proposed and analyzed. The results indicate that the basic reproduction number is a critical threshold for the prevalence of the disease. If the basic reproduction number is less than one, the disease free equilibrium is globally asymptotically stable. Otherwise, the endemic equilibrium is globally asymptotically stable. Therefore, besides the basic reproduction number, a new marker for characterizing the seriousness of the disease, named as dynamical final infective size, is proposed, which differs from traditional final size because the proposed model includes the natural birth and death. Finally, optimization strategies for limited medical resources are obtained from the perspectives of basic reproduction number and dynamical final infective size, and the real-world disease management scenarios are given based on these finding.展开更多
文摘Macroporous weak basic anion exchanger （D301R） was used to remove organic substances from drilling wastewater. The effect of pH, temperature and contact time on adsorption behavior was investigated in batch experiments, which indicated that the COD （Chemical Oxygen Demand） removal ratio of drilling wastewater was approximately 90%, and the COD of treated wastewater was below 70 mg/L under appropriate operating conditions. A mixed liquor of NaOH and NaCI was selected as desorbent because of its better elution performance. The results of column dynamic adsorption and regeneration showed that the COD of wastewater could be efficiently removed by D301R resin, and the resin was easily regenerated by the selected desorbent.
文摘目的评估新癀片糊剂联合牙周基础治疗对慢性牙周炎临床疗效。方法选取我科2022年4月至2023年6月门诊收治的慢性牙周炎患者120例,依据随机数字表法分为对照组、观察组,各60例。对照组在牙周基础治疗龈下刮治操作后,用双氧水冲洗,放置碘甘油于牙周袋内;观察组在牙周基础治疗龈下刮治操作后,用双氧水冲洗,放置新癀片糊剂于牙周袋内。统计分析两组牙周指数、术后24 h VRS评分、临床疗效。结果两组患者龈下刮治术前的PD、BI、GI、BOP、AL、牙齿松动度之间的差异无统计学意义(P>0.05),龈下刮治术后3个月、6个月,观察组患者的PD、BI、GI、BOP、AL、牙齿松动度均低于对照组(P<0.05)。观察组患者的术后24 h VRS评分低于对照组(P<0.05)。观察组患者的总有效率高于对照组(P<0.05)。结论新癀片糊剂联合牙周基础治疗能更加有效地杀灭牙周致病菌,减轻患者治疗后的疼痛,促进牙周组织的愈合。
文摘In this paper, a disease transmission model with two treatment stages is proposed and analyzed. The results indicate that the basic reproduction number is a critical threshold for the prevalence of the disease. If the basic reproduction number is less than one, the disease free equilibrium is globally asymptotically stable. Otherwise, the endemic equilibrium is globally asymptotically stable. Therefore, besides the basic reproduction number, a new marker for characterizing the seriousness of the disease, named as dynamical final infective size, is proposed, which differs from traditional final size because the proposed model includes the natural birth and death. Finally, optimization strategies for limited medical resources are obtained from the perspectives of basic reproduction number and dynamical final infective size, and the real-world disease management scenarios are given based on these finding.
