上网过后温水洗把脸

现在，上网已经成为很多人生活中的重要组成部分。网络可以给人带来工作上的方便．精神上的愉悦和生活上的补充．但过度依赖网络会给人的健康带来什么呢?     

兔肢体爆炸伤合并海水浸泡后在不同复温速率及维持浅低体温下机体炎症反应的特征

Objective To investigate effects of different rewarming rates and maintenance of light hypothermia on inflammatory response in rabbits after limb blast injury, coupled with seawater immersion. Methods First, the model of limb blast injury coupled with seawater immersion was reproduced [the animals were immersed to low body temperature of (31.0±0.5℃)]. Then, 24 adult rabbits were randomly divided into group Ⅰ [the rapid rewarming group, n=6, rewarmed to (38±0.5)℃ at a rate of (8.94±0.93)℃/h], group Ⅱ [the slow rewarming group, n=6, rewarmed to (38±0.5)℃ at a rate of (3.88±0.22)℃/h], group Ⅲ [another slow rewarming group, n=6, rewarmed to (38±0.5)℃ at a rate of (2.18±0.12)℃/h], and the H group [the hypothermia group, n =6, rewarmed to (34 - 35)℃ at a rate of (4.49±0.66)℃/h and kept at that temperature till termination of the experiment]. Regulation of ambient temperature and warm transfusion were used to restore body temperature to target levels and maintained there for 6 hours. Blood samples were taken at 5 different times, I.e. Pre-injury time(T0), post-immersion time (T1), the time when rewarming started (T2), 3 h after rewarming (T3), and 6 h after rewarming (T4). Tissue samples from heart, liver, intestinum, lung and kidney were also collected. Levels of TNF-α (tumor necrosis factor-α), IL-1β (interleukin-1β) and IL-6 (interleukin-6) in plasma and MPO (myeloperoxidase) in homogenate were detected. Results Following rewarming, TNF-α, IL-1β, IL-6 concentrations in the plasma of the animals in group Ⅰ and group H were significantly higher when compared with those of the animals in group Ⅱ and group Ⅲ (P<0.05, P<0.01), and MPO activity in homogenate was significantly higher when compared with that of the animals in group Ⅱ and group Ⅲ(P<0.01, P<0.05), and no statistical difference could be seen between group Ⅱ and Ⅲ (P>0.05). Conclusions Rapid rewarming and maintenance of light hypothermia could obviously elevate TNF-α, IL-1β, IL-6 concentrations in plasma and MPO activity in homogenate, following limb blast injury coupled with hypothermia induced by seawater immersion, while slow rewarming (with a rewarming rate of 2-4℃/h) could significantly inhibit TNF-α, IL-1β, IL-6 levels and PMN activity.     

枯草杆菌Bacillus sp F26产过氧化氢酶的发酵条件

从内蒙古呼伦贝尔草原的盐碱湖中分离到的一株低度嗜盐嗜碱细菌Bacillus sp F26，能积累高水平过氧化氢酶（CAT）。对Bacillus sp F26发酵产过氧化氢酶的环境与营养条件的研究结果表明，其积累高水平过氧化氢酶的适宜环境条件为：温度37℃，种龄20-22h，接种量5％，装液量50mL／（250mL的摇瓶）。适宜发酵培养基组成（g／L）为：葡萄糖15，牛肉膏10，玉米浆10，酵母膏5，磷酸二氢钾1，氯化镁0．2，氯化钠50，碳酸钠10。采用上述条件进行摇瓶分批发酵实验，发酵20h，过氧化氢酶酶活达到16．32U／mL，细胞干重为4．12g／L。进一步研究发现，在对数生长后期（16h）添加2mmol／L的H2O2可以明显刺激产酶，在5L的发酵罐上进一步以指数速率方式流加H2O2，由于该流加方式可降低H2O2对细胞的毒害作用，过氧化氢酶酶活达到29．89U／mL，与分批发酵相比提高了92．8％。     

戊二醛消毒液浸泡金属器械的实验观察

戊二醛消毒液广泛应用于各种医疗器械尤其是象麻醉装置、内窥镜、导管以及其它不能加热灭菌的精密仪器等的消毒。在血站应用于止血钳、镊子、剪刀以及储血冰箱等的消毒。可用浸泡、擦拭、喷雾和熏蒸等方式进行消毒。我们将20 g/L戊二醛消毒液与目前临床常用的几种消毒剂进行比较,以观察浸泡金属器械的消毒效果和对金属的腐蚀速率。1方法试验消毒液为20 g/L戊二醛消毒液,含有效氯2000mg/L金星消毒液,含5000 mg/L苯扎溴铵的器械消毒液。取止血钳、剪刀和镊子等金属器械,经冲洗沥干后,放入盛有各种消毒液的搪瓷方盘中,至预定时间,用无菌吸管…     

洗衣业黑幕 洗脏了什么

2005年7月29日《成都日报》报道，目前洗衣业存在相当多的问题，有的洗衣店干洗机成了摆设；有的洗衣店存在欺瞒现象：说衣服“干洗”实际为“水洗”；有的洗衣店卫生条件差；有害成分清理不净；有的洗衣店专业水平低，不分衣种全部混合操作；有的洗衣店将烘干机冒充干洗机。     

新衣穿前先用盐水洗

新衣服必须用食盐水浸泡后才能穿。因为新衣服上可能残留防驻处理时遗留的致癌物甲醛。     

纸片法和速率法测定胆碱酯酶的比较

目的了解胆碱酯酶(CHE)纸片法和速率法两种方法的相关性,便于临床上对有机磷中毒患者的疗效观察和预后估计。方法在日立7060全自动生化分析仪上测得CHE减少的标本(其中包括有机磷中毒患者、肝病患者、低蛋白血症等各类患者标本),采用美国国家临床实验室标准化委员会(NCCLS)EP9-A文件方案,每天再从其中随机选取8份标本,并分别用纸片法和速率法按顺序1周~8周同时进行测定,再按相反顺序8~1重复测定,共测定5d,记录结果,然后对两种方法得出的结果进行单位比较。结果纸片法的结果只有几个单位值,受主观因素影响,而速率法是国际单位数值大且较精确,要做统计学比较是不现实的,只能从数值上做粗略的估计。纸片法的0u~8u应该是速率法的1000u以下,纸片法的15u~19u应该是速率法的1000u~2000u,纸片法的23u~26u应该是速率法的2200u~3500u,纸片法的30u~34u应该是速率法的3600u~4300u。结论纸片法是目测的试验,比色板只有简单几个单位值,而且受主观因素影响较大,误差较大,准确性和不高,难以标准化。速率法不受人为因素影响,而且准确性和重复性高,易于标准化。两者要做统计学比较是不现实的,只能从数值上做粗略的估计。建议临床上对有机磷和氨基甲酸酯类中毒的患者,进行疗效观察和预后估计时,动态观察CHE以速率法检测为准。