目的:探究果酸换肤联合外用主含马齿苋提取物和青刺果油护肤品治疗轻、中度寻常痤疮的临床疗效。方法:将轻、中度寻常痤疮患者随机分为对照组(果酸换肤治疗)、观察组(果酸换肤治疗联合外用主含马齿苋提取物和青刺果油护肤品),每组60例...目的:探究果酸换肤联合外用主含马齿苋提取物和青刺果油护肤品治疗轻、中度寻常痤疮的临床疗效。方法:将轻、中度寻常痤疮患者随机分为对照组(果酸换肤治疗)、观察组(果酸换肤治疗联合外用主含马齿苋提取物和青刺果油护肤品),每组60例。比较两组患者临床疗效、角质层含水量和经表皮水分流失量(Transepidermal water loss,TEWL)。结果:治疗12周后,观察组总有效率为93.33%高于对照组总有效率78.33%(P<0.05)。治疗6周、12周后观察组患者的角质含水量均高于对照组(P<0.05),且与治疗前相比,治疗6周、12周后,观察组患者的角质含水量均升高(P<0.05)。治疗6周、12周后,观察组患者的TEWL均低于对照组(P<0.05);与治疗前相比,观察组在治疗6周、12周后TEWL均降低(P<0.05)。结论:果酸换肤联合主含马齿苋提取物和青刺果油护肤品治疗面部轻、中度寻常痤疮疗效显著,同时可增加皮肤含水量,降低经表皮水分流失量,使用安全感良好。展开更多
Understanding the relationship between landscape pattems and ecological processes has been a central yet challenging research theme in landscape ecology. Over the past decades, many landscape metrics have been propose...Understanding the relationship between landscape pattems and ecological processes has been a central yet challenging research theme in landscape ecology. Over the past decades, many landscape metrics have been proposed but few directly incorporated ecological processes. In this paper, we developed a landscape index, namely, location-weighted landscape index （LWLI） to highlight the role of landscape type in ecological processes, such as nutrient losses and soil erosion. Within the framework of the Lorenz curve theory, we develop this index by integrating land- scape pattern and point-based measurements at a watershed scale. The index can be used to characterize the contribution of landscape pattern to ecological processes （e.g. nutrient losses） with respect to a specific monitoring point in a watershed. Through a case study on nutrient losses in an agricultural area in northeastern China, we found that nutrient losses tended to be higher for a watershed with a higher LWLI value, and vice versa. It implied that LWLI can be used to evaluate the potential risk of nutrient losses or soil erosion by comparing their values across watersheds. In addition, this index can be extended to characterize ecological processes, such as the effect of landscape pattern on wildlife inhabitation and urban heat island effect. Finally, we discuss several problems that should be paid attention to when applying this index to a heterogeneous landscape site.展开更多
文摘目的:探究果酸换肤联合外用主含马齿苋提取物和青刺果油护肤品治疗轻、中度寻常痤疮的临床疗效。方法:将轻、中度寻常痤疮患者随机分为对照组(果酸换肤治疗)、观察组(果酸换肤治疗联合外用主含马齿苋提取物和青刺果油护肤品),每组60例。比较两组患者临床疗效、角质层含水量和经表皮水分流失量(Transepidermal water loss,TEWL)。结果:治疗12周后,观察组总有效率为93.33%高于对照组总有效率78.33%(P<0.05)。治疗6周、12周后观察组患者的角质含水量均高于对照组(P<0.05),且与治疗前相比,治疗6周、12周后,观察组患者的角质含水量均升高(P<0.05)。治疗6周、12周后,观察组患者的TEWL均低于对照组(P<0.05);与治疗前相比,观察组在治疗6周、12周后TEWL均降低(P<0.05)。结论:果酸换肤联合主含马齿苋提取物和青刺果油护肤品治疗面部轻、中度寻常痤疮疗效显著,同时可增加皮肤含水量,降低经表皮水分流失量,使用安全感良好。
基金Under the auspices of Chinese Academy of Sciences (No. KZCX2-YW-421)National Natural Science Foundation of China (No. 40621061, 30570319)
文摘Understanding the relationship between landscape pattems and ecological processes has been a central yet challenging research theme in landscape ecology. Over the past decades, many landscape metrics have been proposed but few directly incorporated ecological processes. In this paper, we developed a landscape index, namely, location-weighted landscape index （LWLI） to highlight the role of landscape type in ecological processes, such as nutrient losses and soil erosion. Within the framework of the Lorenz curve theory, we develop this index by integrating land- scape pattern and point-based measurements at a watershed scale. The index can be used to characterize the contribution of landscape pattern to ecological processes （e.g. nutrient losses） with respect to a specific monitoring point in a watershed. Through a case study on nutrient losses in an agricultural area in northeastern China, we found that nutrient losses tended to be higher for a watershed with a higher LWLI value, and vice versa. It implied that LWLI can be used to evaluate the potential risk of nutrient losses or soil erosion by comparing their values across watersheds. In addition, this index can be extended to characterize ecological processes, such as the effect of landscape pattern on wildlife inhabitation and urban heat island effect. Finally, we discuss several problems that should be paid attention to when applying this index to a heterogeneous landscape site.
