The physiological mechanism of maintaining the green colour of pak choy leaves (Brassicarapa var chinensis) with heat-shock treatment was studied. Chlorophyll in the outerleaves of pak choy degraded rapidly during sto...The physiological mechanism of maintaining the green colour of pak choy leaves (Brassicarapa var chinensis) with heat-shock treatment was studied. Chlorophyll in the outerleaves of pak choy degraded rapidly during storage at ambient temperature (20±2℃), aslight yellow appeared. Heat-shock treatment (46-50℃) had a mild effect on maintainingthe green colour of outer leaves. Normal chlorophyll degradation was associated with abinding of chlorophyll with chlorophyll-binding-protein preceding chlorophyll breakdown.Heat-shock treatment was found to reduce the binding-capacity between chlorophyll-binding-protein and chlorophyll. In the chlorophyll degradation pathway, pheide dioxygenasewas synthesized during leaf senescence which was considered to be a key enzyme inchlorophyll degradation. Activity of this enzyme was reduced following heat-shocktreatment, which might explain the observed reduction in chlorophyll breakdown. Twogroups of heat-shock proteins were detected in treated leaves, the first group containingproteins from 54KDa to 74Kda, and the second group contained proteins from 15KDa to29KDa. Heat-shock treatment was also found to retard the decline of glucose and fructose(the main energy substrates) of outer leaves.展开更多
Objectives The work intended to reveal the effect of cold shock(CS)treatment on chiling injury(CI),antioxidant capacity.and membrane fatty acid of peach fruit.Materials and methods Peaches were soaked in ice water(10...Objectives The work intended to reveal the effect of cold shock(CS)treatment on chiling injury(CI),antioxidant capacity.and membrane fatty acid of peach fruit.Materials and methods Peaches were soaked in ice water(10℃)for 10 min and stored at 5℃ for 28 d for determination,except CI,and then stored for 3 dat 20℃,only CI was measured.The electrolyte leakage(EL)was measured by conductivity meter.The activities of antioxidant enzymes(superoxide dismutase,ascorbate peroxidase,catalase,and peroxidase)and key enzymes of membrane lipid metabolism(phospho-lipase D,lipase,and lipoxygenase)as well as reactive oxygen species(ROS,O_(2)^(-)and H_(2)O_(2))were measured with a spectrophotometer.An ELISA kit and gas chromatography were used to determine membrane lipids and membrane fatty acids.The relative gene expression was measured by real-time polymerase chain reaction analysis.Results The results showed that CS treatment effectively delayed CI,suppressed the increase of EL and malondialdehyde content.Meanwhile,CS-treated fruit exhibited lower level of ROS and higher activities of antioxidant enzymes.Furthermore,CS treatment inhibited the activities as well as the relative gene expression of key enzymes in membrane lipid metabolism.CS-treated fruits maintained higher membrane fatty acid unsaturation and lower phosphatidic acid content.Conclusions These results indicated that CS treatment effectively lleviated CI and maintained the integrity of cell membranes by inducing antioxidant-related enzyme activity and maintaining a higher ratio of unsaturated fatty acids to saturated fatty acids.展开更多
Shock wave lithotripsy(SWL) was introduced in 1980, modernizing the treatment of upper urinary tract stones, and quickly became the most commonly utilized technique to treat kidney stones. Over the past 5-10 years, ho...Shock wave lithotripsy(SWL) was introduced in 1980, modernizing the treatment of upper urinary tract stones, and quickly became the most commonly utilized technique to treat kidney stones. Over the past 5-10 years, however, use of SWL has been declining because it is not as reliably effective as more modern technology. SWL success rates vary considerably and there is abundant literature predicting outcome based on patient- and stone-specific parameters. Herein we discuss the ways to optimize SWL outcomes by reviewing proper patient selection utilizing stone characteristics and patient features. Stone size, number, location, density, composition, and patient body habitus and renal anatomy are all discussed. We also review the technical parameters during SWL that can be controlled to improve results further, including type of anesthesia, coupling, shock wave rate, focal zones, pressures, and active monitoring. Following these basic principles and selection criteria will help maximize success rate.展开更多
背景:体外冲击波因对各种肌肉骨骼疾病的潜在益处而备受关注,越来越多的研究证明其具有缓解疼痛和功能恢复等优良效果。然而,针对体外冲击波治疗疼痛相关可视化研究相对缺乏。目的:对体外冲击波治疗疼痛相关研究进行可视化分析,梳理国...背景:体外冲击波因对各种肌肉骨骼疾病的潜在益处而备受关注,越来越多的研究证明其具有缓解疼痛和功能恢复等优良效果。然而,针对体外冲击波治疗疼痛相关可视化研究相对缺乏。目的:对体外冲击波治疗疼痛相关研究进行可视化分析,梳理国内外该领域的知识结构、探索研究现状及热点趋势。方法:检索Web of Science(WOS)核心合集数据库及中国知网(CNKI)数据库中2002-2022年间体外冲击波治疗疼痛相关研究的文献,利用Citespace软件进行可视化分析制作图谱并解读其涵义。结果与结论:①共纳入文献2101篇,发文量呈波动性上升趋势,美国和中国在发文量具有一定优势;发文机构多为大学和医院,发文作者多属于独立团队,发文机构及作者彼此交流有待加强,跨机构、跨地域合作度较低;关键词可视化分析表明体外冲击波在肌骨疾病应用广泛,未来研究侧重于多学科深入研究及联合疗法的临床疗效观察。②体外冲击波应用于疼痛领域的研究主要集中在足底筋膜炎、肩周炎、网球肘等肌肉骨骼疾病的治疗。近年来与超声引导注射治疗、中国传统治疗技术的联合治疗及新领域的拓展是研究趋势及关注热点。展开更多
目的:探讨冲击波联合等速肌力训练对早中期膝骨关节炎的研究现状。方法:运用文献资料法等研究方法,通过中国知网、Pubmed、Web of science、万方、维普等数据库对冲击波治疗及等速肌力训练对早中期膝骨关节炎影响的相关文献进行综述和...目的:探讨冲击波联合等速肌力训练对早中期膝骨关节炎的研究现状。方法:运用文献资料法等研究方法,通过中国知网、Pubmed、Web of science、万方、维普等数据库对冲击波治疗及等速肌力训练对早中期膝骨关节炎影响的相关文献进行综述和归纳。结果:冲击波治疗对于早中期膝骨关节炎患者的疼痛、僵硬、VAS、Lequesne指数评分、WOMAC骨关节炎指数均有一定改善;等速肌力训练能够提高早中期膝骨关节炎患者膝关节周围肌力及关节活动度,同时对本体感觉也有一定的影响。结论:冲击波联合等速肌力训练可以有效地缓解早中期膝骨关节炎患者疼痛及改善身体的功能。展开更多
文摘The physiological mechanism of maintaining the green colour of pak choy leaves (Brassicarapa var chinensis) with heat-shock treatment was studied. Chlorophyll in the outerleaves of pak choy degraded rapidly during storage at ambient temperature (20±2℃), aslight yellow appeared. Heat-shock treatment (46-50℃) had a mild effect on maintainingthe green colour of outer leaves. Normal chlorophyll degradation was associated with abinding of chlorophyll with chlorophyll-binding-protein preceding chlorophyll breakdown.Heat-shock treatment was found to reduce the binding-capacity between chlorophyll-binding-protein and chlorophyll. In the chlorophyll degradation pathway, pheide dioxygenasewas synthesized during leaf senescence which was considered to be a key enzyme inchlorophyll degradation. Activity of this enzyme was reduced following heat-shocktreatment, which might explain the observed reduction in chlorophyll breakdown. Twogroups of heat-shock proteins were detected in treated leaves, the first group containingproteins from 54KDa to 74Kda, and the second group contained proteins from 15KDa to29KDa. Heat-shock treatment was also found to retard the decline of glucose and fructose(the main energy substrates) of outer leaves.
基金supported by the National Natural Science Foundation of China (No.31972125)the Fundamental Research Funds for the Central Universities (KYYJ201908),China.
文摘Objectives The work intended to reveal the effect of cold shock(CS)treatment on chiling injury(CI),antioxidant capacity.and membrane fatty acid of peach fruit.Materials and methods Peaches were soaked in ice water(10℃)for 10 min and stored at 5℃ for 28 d for determination,except CI,and then stored for 3 dat 20℃,only CI was measured.The electrolyte leakage(EL)was measured by conductivity meter.The activities of antioxidant enzymes(superoxide dismutase,ascorbate peroxidase,catalase,and peroxidase)and key enzymes of membrane lipid metabolism(phospho-lipase D,lipase,and lipoxygenase)as well as reactive oxygen species(ROS,O_(2)^(-)and H_(2)O_(2))were measured with a spectrophotometer.An ELISA kit and gas chromatography were used to determine membrane lipids and membrane fatty acids.The relative gene expression was measured by real-time polymerase chain reaction analysis.Results The results showed that CS treatment effectively delayed CI,suppressed the increase of EL and malondialdehyde content.Meanwhile,CS-treated fruit exhibited lower level of ROS and higher activities of antioxidant enzymes.Furthermore,CS treatment inhibited the activities as well as the relative gene expression of key enzymes in membrane lipid metabolism.CS-treated fruits maintained higher membrane fatty acid unsaturation and lower phosphatidic acid content.Conclusions These results indicated that CS treatment effectively lleviated CI and maintained the integrity of cell membranes by inducing antioxidant-related enzyme activity and maintaining a higher ratio of unsaturated fatty acids to saturated fatty acids.
文摘Shock wave lithotripsy(SWL) was introduced in 1980, modernizing the treatment of upper urinary tract stones, and quickly became the most commonly utilized technique to treat kidney stones. Over the past 5-10 years, however, use of SWL has been declining because it is not as reliably effective as more modern technology. SWL success rates vary considerably and there is abundant literature predicting outcome based on patient- and stone-specific parameters. Herein we discuss the ways to optimize SWL outcomes by reviewing proper patient selection utilizing stone characteristics and patient features. Stone size, number, location, density, composition, and patient body habitus and renal anatomy are all discussed. We also review the technical parameters during SWL that can be controlled to improve results further, including type of anesthesia, coupling, shock wave rate, focal zones, pressures, and active monitoring. Following these basic principles and selection criteria will help maximize success rate.
文摘背景:体外冲击波因对各种肌肉骨骼疾病的潜在益处而备受关注,越来越多的研究证明其具有缓解疼痛和功能恢复等优良效果。然而,针对体外冲击波治疗疼痛相关可视化研究相对缺乏。目的:对体外冲击波治疗疼痛相关研究进行可视化分析,梳理国内外该领域的知识结构、探索研究现状及热点趋势。方法:检索Web of Science(WOS)核心合集数据库及中国知网(CNKI)数据库中2002-2022年间体外冲击波治疗疼痛相关研究的文献,利用Citespace软件进行可视化分析制作图谱并解读其涵义。结果与结论:①共纳入文献2101篇,发文量呈波动性上升趋势,美国和中国在发文量具有一定优势;发文机构多为大学和医院,发文作者多属于独立团队,发文机构及作者彼此交流有待加强,跨机构、跨地域合作度较低;关键词可视化分析表明体外冲击波在肌骨疾病应用广泛,未来研究侧重于多学科深入研究及联合疗法的临床疗效观察。②体外冲击波应用于疼痛领域的研究主要集中在足底筋膜炎、肩周炎、网球肘等肌肉骨骼疾病的治疗。近年来与超声引导注射治疗、中国传统治疗技术的联合治疗及新领域的拓展是研究趋势及关注热点。
文摘目的:探讨冲击波联合等速肌力训练对早中期膝骨关节炎的研究现状。方法:运用文献资料法等研究方法,通过中国知网、Pubmed、Web of science、万方、维普等数据库对冲击波治疗及等速肌力训练对早中期膝骨关节炎影响的相关文献进行综述和归纳。结果:冲击波治疗对于早中期膝骨关节炎患者的疼痛、僵硬、VAS、Lequesne指数评分、WOMAC骨关节炎指数均有一定改善;等速肌力训练能够提高早中期膝骨关节炎患者膝关节周围肌力及关节活动度,同时对本体感觉也有一定的影响。结论:冲击波联合等速肌力训练可以有效地缓解早中期膝骨关节炎患者疼痛及改善身体的功能。
