观察评估七叶皂苷钠片治疗上呼吸道感染所致咽喉肿痛的治疗作用和效果。方法 选取在2023年1月9日至2023年1月16日收治的88例急性上呼吸道感染患者作为研究对象,应用组间对比的研究方式,分为试验组和对照组。对照组进行常规治疗;试验组...观察评估七叶皂苷钠片治疗上呼吸道感染所致咽喉肿痛的治疗作用和效果。方法 选取在2023年1月9日至2023年1月16日收治的88例急性上呼吸道感染患者作为研究对象,应用组间对比的研究方式,分为试验组和对照组。对照组进行常规治疗;试验组均在常规治疗的基础上,口服七叶皂苷钠片进行治疗。观察两组患者治疗第3、5、7天时的感冒症状评分、不同症状缓解情况,并进行统计比较。同时记录患者合并用药情况及不良反应。结果 治疗第3、5、7天时,试验组感冒症状总评分明显低于对照组感冒症状总分(P<0.001)。试验组治疗有效率显著高于对照组治疗有效率(100% vs 46.51%,P<0.0001)。治疗第3天,试验组已有44例患者咽痛症状明显缓解,明显高于对照组(97.78% vs 44.19%,P<0.0001)。治疗过程中均无不良反应发生。结论 七叶皂苷钠片能够有效缓解急性上呼吸道感染所致咽喉肿痛及其他症状,且无不良反应发生。展开更多
The unique cellular microstructure of Fe-rich Sm_(2)Co_(17)-type permanent magnets is closely associated with the structure of the solid solution precursor.We investigate the phase structure,magnetic properties,and me...The unique cellular microstructure of Fe-rich Sm_(2)Co_(17)-type permanent magnets is closely associated with the structure of the solid solution precursor.We investigate the phase structure,magnetic properties,and mechanical behavior of B-doped Sm_(2)Co_(17)-type magnets with high Fe content.The doped B atoms can diffuse into the interstitial vacancy,resulting in lattice expansion and promote the homogenization of the phase organizational structure during the solid solution treatment in theory.However,the resulting second phase plays a dominant role to result in more microtwin structures and highly ordered 2:17R phases in the solid solution stage,which inhibits the ordering transformation of 1:7H phase during aging and affects the generation of the cellular structure,and to result in a decrease in magnetic properties,yet the interface formed between it and the matrix phase hinders the movement of dislocations and enhances the mechanical properties.Hence,the precipitation of high flexural strain grain boundary phase induced by B element doping is also a new and effective way to improve the flexural strain of Sm_(2)Co_(17)-type magnets.Our study provides a new understanding of the phase structure evolution and its effect on the magnetic and mechanical properties of Sm_(2)Co_(17)-type magnets with high Fe content.展开更多
The grain boundary phase affects the magnetic properties and corrosion resistance of sintered NdFeB magnets.In this work,a small amount of In was added to NdFeB magnets by induction melting to systematically investiga...The grain boundary phase affects the magnetic properties and corrosion resistance of sintered NdFeB magnets.In this work,a small amount of In was added to NdFeB magnets by induction melting to systematically investigate its effect on the evolution of the microstructure,magnetic properties and corrosion resistance of NdFeB magnets.Microstructural analysis illustrated that minor In addition generated more grain boundary phases and an abundant amorphous phase at the triple-junction grain boundary.While the addition of In failed to enhance the magnetic isolation effect between adjacent matrix grains,its incorporation fortuitously elevated the electrochemical potential of the In-containing magnets.Besides,during corrosion,an In-rich precipitate phase formed,hindering the ingress of the corrosive medium into the magnet.Consequently,this significantly bolstered the corrosion resistance of the sintered NdFeB magnets.The phase formation,magnetic properties and corrosion resistance of In-doped NdFeB magnets are detailed in this work,which provides new prospects for the preparation of high-performance sintered NdFeB magnets.展开更多
文摘观察评估七叶皂苷钠片治疗上呼吸道感染所致咽喉肿痛的治疗作用和效果。方法 选取在2023年1月9日至2023年1月16日收治的88例急性上呼吸道感染患者作为研究对象,应用组间对比的研究方式,分为试验组和对照组。对照组进行常规治疗;试验组均在常规治疗的基础上,口服七叶皂苷钠片进行治疗。观察两组患者治疗第3、5、7天时的感冒症状评分、不同症状缓解情况,并进行统计比较。同时记录患者合并用药情况及不良反应。结果 治疗第3、5、7天时,试验组感冒症状总评分明显低于对照组感冒症状总分(P<0.001)。试验组治疗有效率显著高于对照组治疗有效率(100% vs 46.51%,P<0.0001)。治疗第3天,试验组已有44例患者咽痛症状明显缓解,明显高于对照组(97.78% vs 44.19%,P<0.0001)。治疗过程中均无不良反应发生。结论 七叶皂苷钠片能够有效缓解急性上呼吸道感染所致咽喉肿痛及其他症状,且无不良反应发生。
基金the NationalKey R&D Program of China (Grant Nos. 2021YFB3503102and 2022YFB3505301)Science and Technology Innovation2025 Major Project of Ningbo (Grant No. 2022Z204)+2 种基金ZhejiangProvincial Natural Science Foundation Youth OriginalProject (Grant No. LDQ24E010001)the Key R&D Programof Shanxi Province (Grant No. 202302050201014)Ningbo Natural Science Foundation (Grant No. 2021J216).
文摘The unique cellular microstructure of Fe-rich Sm_(2)Co_(17)-type permanent magnets is closely associated with the structure of the solid solution precursor.We investigate the phase structure,magnetic properties,and mechanical behavior of B-doped Sm_(2)Co_(17)-type magnets with high Fe content.The doped B atoms can diffuse into the interstitial vacancy,resulting in lattice expansion and promote the homogenization of the phase organizational structure during the solid solution treatment in theory.However,the resulting second phase plays a dominant role to result in more microtwin structures and highly ordered 2:17R phases in the solid solution stage,which inhibits the ordering transformation of 1:7H phase during aging and affects the generation of the cellular structure,and to result in a decrease in magnetic properties,yet the interface formed between it and the matrix phase hinders the movement of dislocations and enhances the mechanical properties.Hence,the precipitation of high flexural strain grain boundary phase induced by B element doping is also a new and effective way to improve the flexural strain of Sm_(2)Co_(17)-type magnets.Our study provides a new understanding of the phase structure evolution and its effect on the magnetic and mechanical properties of Sm_(2)Co_(17)-type magnets with high Fe content.
基金funded by Ningbo Key R&D Plan and“Unveiling and Leading”(Grant No.2023Z093)Ningbo Science and Technology Innovation 2025 Major Special Project(Grant No.2022Z106)Hezhou City Central Leading Local Science and Technology Development Special Fund Project(Grant No.HK ZY2022002).
文摘The grain boundary phase affects the magnetic properties and corrosion resistance of sintered NdFeB magnets.In this work,a small amount of In was added to NdFeB magnets by induction melting to systematically investigate its effect on the evolution of the microstructure,magnetic properties and corrosion resistance of NdFeB magnets.Microstructural analysis illustrated that minor In addition generated more grain boundary phases and an abundant amorphous phase at the triple-junction grain boundary.While the addition of In failed to enhance the magnetic isolation effect between adjacent matrix grains,its incorporation fortuitously elevated the electrochemical potential of the In-containing magnets.Besides,during corrosion,an In-rich precipitate phase formed,hindering the ingress of the corrosive medium into the magnet.Consequently,this significantly bolstered the corrosion resistance of the sintered NdFeB magnets.The phase formation,magnetic properties and corrosion resistance of In-doped NdFeB magnets are detailed in this work,which provides new prospects for the preparation of high-performance sintered NdFeB magnets.
