针对Φ180 mm MPM连轧管生产线环形加热炉的烟气治理问题,开发了SNCR(选择性非催化还原)-SDS(高活性钙干法脱硫)一体化处理工艺。通过系统分析加热炉烟气特性,创新性地将SNCR脱硝技术与SDS干法脱硫技术有机结合,构建了完整的烟气净化系...针对Φ180 mm MPM连轧管生产线环形加热炉的烟气治理问题,开发了SNCR(选择性非催化还原)-SDS(高活性钙干法脱硫)一体化处理工艺。通过系统分析加热炉烟气特性,创新性地将SNCR脱硝技术与SDS干法脱硫技术有机结合,构建了完整的烟气净化系统。工程应用表明,该技术方案实现了SO_(2)排放浓度≤50 mg/Nm^(3)、颗粒物浓度≤10 mg/Nm^(3)的超低排放标准,年可减少SO_(2)排放量约74.69 t。研究为热轧钢管生产线加热炉的烟气治理提供了可靠的技术方案,具有显著的环保效益和推广应用价值。展开更多
目的观察在老年心血管疾病患者的康复治疗期间应用早期康复护理的临床效果。方法研究共纳入本院在2022年2月至2024年6月收治的96例老年心血管疾病患者,采用随机数字表法分为对照组(n=48,心内科常规护理)和观察组(n=48,心内科常规护理+...目的观察在老年心血管疾病患者的康复治疗期间应用早期康复护理的临床效果。方法研究共纳入本院在2022年2月至2024年6月收治的96例老年心血管疾病患者,采用随机数字表法分为对照组(n=48,心内科常规护理)和观察组(n=48,心内科常规护理+早期康复护理),观察患者情绪状态、自理能力、日常生活活动能力、生活质量和健康行为经干预后的改善情况。结果经干预后,观察组各项指标及状态的改善情况更为理想,其中焦虑自评量表(Self-Rating Anxiety Scale,SAS)和抑郁自评量表(Self-rating depression scale,SDS)得分相对更低,其中SDS对比情况为(39.65±3.86 vs 46.96±4.02)分(P<0.05);自我维护能力(Self-Maintenance Ability Scale for Adults,ESCA)、日常生活活动评定量表(the Barthel Index of ADL,Barthel)更高,其中Barthel对比情况为(71.78±3.15 vs 49.15±3.42)分(P<0.05);健康调查简表(the MOS item short form health survey,SF-36)评分和健康行为评定分值均显著更高(P<0.05)。结论从抑郁情绪改善状态和日常生活活动情况上来看,早期康复护理效果更为理想。展开更多
Poly(phenylene oxide)(PPO)exhibits excellent dielectric properties,making it an ideal substrate for high-frequency,high-speed copper-clad laminates.The phenolic hydroxyl group at the end of PPO plays a key role in its...Poly(phenylene oxide)(PPO)exhibits excellent dielectric properties,making it an ideal substrate for high-frequency,high-speed copper-clad laminates.The phenolic hydroxyl group at the end of PPO plays a key role in its reactivity.Accurately quantifying the phenolic hydroxyl content in PPO is essential but challenging.In this study,we proposed a method for measuring the phenolic hydroxyl content of PPO using differential UV absorption spectroscopy.In alkaline solutions,the phenolic hydroxyl in PPO completely ionizes to form phenoxide ions,leading to a significant increase in UV absorbance at approximately 250 and 300 nm.Notably,the differential UV absorbance at approximately 300 nm was directly proportional to the phenolic hydroxyl concentration.Using 2,6-dimethylphenol as a standard,a calibration curve was established to relate the phenolic hydroxyl concentration to differential UV absorbance at approximately 300 nm,providing a precise and straightforward method for phenolic hydroxyl quantification in PPO with distinct advantages over conventional techniques.展开更多
文摘目的观察在老年心血管疾病患者的康复治疗期间应用早期康复护理的临床效果。方法研究共纳入本院在2022年2月至2024年6月收治的96例老年心血管疾病患者,采用随机数字表法分为对照组(n=48,心内科常规护理)和观察组(n=48,心内科常规护理+早期康复护理),观察患者情绪状态、自理能力、日常生活活动能力、生活质量和健康行为经干预后的改善情况。结果经干预后,观察组各项指标及状态的改善情况更为理想,其中焦虑自评量表(Self-Rating Anxiety Scale,SAS)和抑郁自评量表(Self-rating depression scale,SDS)得分相对更低,其中SDS对比情况为(39.65±3.86 vs 46.96±4.02)分(P<0.05);自我维护能力(Self-Maintenance Ability Scale for Adults,ESCA)、日常生活活动评定量表(the Barthel Index of ADL,Barthel)更高,其中Barthel对比情况为(71.78±3.15 vs 49.15±3.42)分(P<0.05);健康调查简表(the MOS item short form health survey,SF-36)评分和健康行为评定分值均显著更高(P<0.05)。结论从抑郁情绪改善状态和日常生活活动情况上来看,早期康复护理效果更为理想。
基金the“Pioneer”and“Leading Goose”R&D Program of Zhejiang(No.2023C01072)the Institute of Zhejiang University-Quzhou for their financial support。
文摘Poly(phenylene oxide)(PPO)exhibits excellent dielectric properties,making it an ideal substrate for high-frequency,high-speed copper-clad laminates.The phenolic hydroxyl group at the end of PPO plays a key role in its reactivity.Accurately quantifying the phenolic hydroxyl content in PPO is essential but challenging.In this study,we proposed a method for measuring the phenolic hydroxyl content of PPO using differential UV absorption spectroscopy.In alkaline solutions,the phenolic hydroxyl in PPO completely ionizes to form phenoxide ions,leading to a significant increase in UV absorbance at approximately 250 and 300 nm.Notably,the differential UV absorbance at approximately 300 nm was directly proportional to the phenolic hydroxyl concentration.Using 2,6-dimethylphenol as a standard,a calibration curve was established to relate the phenolic hydroxyl concentration to differential UV absorbance at approximately 300 nm,providing a precise and straightforward method for phenolic hydroxyl quantification in PPO with distinct advantages over conventional techniques.
