黄芪沐浴剂抗皮肤衰老作用研究

报道了以黄芪提取液为原料复配制备沐浴剂样品的抗皮肤衰老作用试验效果.将9月龄小鼠每日浸浴于含有不同浓度药液的沐浴剂中,早晚15min各一次,3个月后处死,取背部皮肤,测定小鼠皮肤中羟脯氨酸(HYP)、超氧化物歧化酶(SOD)与过氧化脂质(LPO)含量.经含有5 %和10 %药液沐浴剂浸浴的试验小鼠HYP含量分别为32.68±3.21 mg/g 和38.66±3.84 mg/g,SOD含量为17.94±0.56 U/mL 和19.78±0.63 U/mL,LPO为20.27±2.65 nmol/mL和18.47±2.90 nmol/mL,与对照组相比均P＜0.05.结果表明该沐浴剂具有显著的抗皮肤衰老作用.     

RACIALIZING CULTURE IS ORDINARY1

This article engages a discussion of Raymond Williams claim that culture is ordinary to explore some of the ways in which racializing culture is embedded in everyday interactions and processes of identification that found subjectivity. It argues that there is a pressing need for social policy analysts to come to grips with the mechanisms through which ‘culture’ comes to be racialized and an object/subject of governance and suggests that current, high-profile articulations of the ‘problems’ of multiculturalism, profoundly hinder such a development.     

黄芩甙护肤霜的研制和应用

介绍利用中草药黄芩提取物黄芩甙制成水包油型护肤霜,其各项理化指标符合QB/T1857—93标准。临床应用结果表明,该护肤霜对黄褐斑、色素沉着、痤疮、皮肤粗糙、干裂疗效显著。     

蟾蜍耳后腺与皮肤腺化学成分层析法比较研究

通过采用薄层层析的方法 ,比较了蟾蜍耳后腺和皮肤腺分泌物中的化学成份 .就甾体类化合物和肽类物质的硅胶层析展开物进行对比 ,实验结果显示两种不同位置的提取物具有相同的特征性化学物质 .其结果为扩展蟾酥这一中药材的来源和提高其采集量提供了直接的实验证据     

球墨铸铁曲轴的气体软氮化

柴油机的珠墨铸铁曲轴系重要零件,气体软氮化应用到球墨铸铁领域还是一种新工艺,而且比中频淬火效果好,提高了曲轴的抗疲劳和抗磨损的能力。本文对气体软氮化的基本原理、设备、工艺参数的选择和催渗方法进行了探讨,对软氮化后曲轴的尺寸形状误差、光洁度和机械性能的提高等进行了较详细的试验、分析和比较,结果,经气体软氮化后的曲轴不但尺寸形站误差符合图纸要求外,而且抛去轻微氧化层后光洁度还略有提高,曲轴安全系数由1.3～1.6提高到1.70～1.77,并且一般不再发生疲劳断(?),使用寿命比原来寿命增加3.32倍以上。     

赫哲族“鱼皮”剪纸简论

生活在松花江、黑龙江沿岸的赫哲族,世代以捕鱼为业,食肉衣皮.赫哲人创造了丰富多样的民间艺术,用鱼皮作载体的剪纸是其中的典型之作.鱼皮剪纸材料独特,具有浓郁的地域特色;其内容表现了赫哲人的审美追求与信仰崇尚,具有鲜明的民族风格.鱼皮剪纸是赫哲人宝贵的遗存文化,具有重要的艺术价值与开发价值.     

试论赫哲族鱼皮服饰审美与手工技艺的传承和保护

鱼皮服饰是北方渔猎民族的文化符号与有形智慧之物,它一方面演绎了“实用”与“审美”相统一的与生产样式不分离的生活艺术,另一方面也反映出特定的民俗样式、宗教信仰与审美情感。     

Indoor Tanning and Problem Behavior

Objective: The authors examined factors predicting college students' use of tanning beds. Participants and Methods: Undergraduate students (N = 745) at a large Northeastern university participated in the study by answering a survey measuring tanning behavior and other psychosocial variables, including sensation seeking, self-esteem, tanning image beliefs, and friends' tanning bed use. Results: All 3 systems from problem behavior theory predicted past tanning bed use and intention to use tanning beds. The authors observed a positive association between sensation seeking and intention to use tanning beds. Tanning image beliefs were positively associated with both past tanning behavior and intention to use tanning beds. Conclusions: Interventions focusing on friend and acquaintance social network influences may be more effective than health-risk campaigns in reducing tanning bed use.     

Skin Color and Intelligence in African Americans: A Reply to Hill

Hill's theory that the positive association between light skin color and intelligence among African Americans can be explained as a result of discrimination by whites against darker skinned blacks is implausible. There is no direct evidence for this theory. If it were true, dark skinned blacks should earn less than light skinned blacks as a result of greater discrimination against them. The NORC data show that this is not the case. Hill's analysis is an example of the Sociologists' Fallacy that consists of treating correlates as causes.     

Ultraviolet radiation in urban ecosystems with consideration of effects on human health

Excess exposure to ultraviolet radiation (UV) from the sun, particularly the ultraviolet B (UVB), is cited as a cause or contributing factor for deleterious effects on human health, including skin cancers and cataracts. Rates of skin cancer have increased greatly in recent years, and increased UVB caused by reductions in stratospheric ozone may be responsible for some of the increase in rates, though quantified estimates of the effect of the UVB changes on health have low certainty. UVB exposure also affects the function of the immune system, and the potential resulting effects on infectious diseases and immunizations are a concern. Epidemiological considerations suggest that peoples' routine exposure to UV in urban areas can be significant in adverse health effects, particularly for young children. Projected trends of ozone indicate that agreements to limit ozone-depleting substances are slowing the UVB increase, but high levels will continue and apparently impact health to the middle of the current century. Urban trees greatly reduce ultraviolet irradiance in their shade when they obscure both the sun and sky. Where trees or other structures obscure only the sun, leaving much of the sky in view, UVB irradiance will be greater than suggested by the visible shade. Since air pollutants influence the UVB above the canopy, and the overlying atmosphere is usually more polluted in urban than rural areas, additional above-canopy monitoring of UV in urban areas is needed for comparison to existing rural monitoring sites. Such monitoring would facilitate the development of computer models of urban effects on UV, which are needed for epidemiological investigations, public education, and urban planning.