Effect of the phenol antioxidant katavidan on autooxidation of microsomes exposed to visible light

A study is performed of the effect of the phenol antioxidant katavidan on autooxidation of microsomes from rat liver exposed to visible light. It is shown that katavidan in a concentration of 10⁻³ M inhibits but in concentrations of 10⁻⁵–10⁻⁷ M stimulates autooxidation of microsomes. No stimulation is observed under conditions of dark incubation. Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 118, № 10, pp. 393–394, October, 1994 Presented by I. P. Ashmarin, Member of the Russian Academy of Medical Sciences     

针刺加湿热敷治疗面瘫的临床观察

目的：观察针刺结合湿热敷治疗面瘫的临床疗效。方法：将86例面瘫患者分别采用针刺加湿热敷和单纯针刺两种疗法治疗,6天为1疗程,连续观察3个疗程,并比较不同疗程的疗效。结果：第1疗程两组无显著差异;第2疗程、第3疗程,针刺加湿热敷组均优于单纯针刺组,P〈0．01,具有统计学意义。结论：针刺加湿热敷疗法优势明显,可以缩短疗程。     

明目地黄丸中牡丹皮白芍的含量测定

目的:建立紫外分光光度法测定明目地黄丸中牡丹皮、白芍两味中药总丹皮酚含量。方法:按《中国药典》2000年版一部收载六味地黄丸中牡丹皮含量测定方法,以水蒸气蒸馏丹皮酚,通过测定274nm最大吸收波长处紫外吸收进行含量测定。结果:明目地黄丸总丹皮酚的紫外图谱与六味地黄丸中丹皮酚的紫外图谱完全一致,且阴性对照吸收度可忽略不计。结论:本法简便、快速、专属性强、重现性好。     

Exposure to formaldehyde and phenol during an anatomy dissecting course: sensitizing potency of formaldehyde in medical students

BACKGROUND: The sensitizing potency of formaldehyde and phenol during anatomy dissecting was investigated. The objective was to determine whether exposure induces specific IgE or IgG against formaldehyde-albumin or phenol-albumin. METHODS: In 27 medical students, specific IgE against formaldehyde-albumin by RAST plus ELISA and specific IgE against phenol-albumin by ELISA were assessed. In addition, specific IgG against formaldehyde-albumin was assessed in 23 students. Symptoms before and during dissecting were assessed, and indoor formaldehyde and phenol were measured. RESULTS: Mean indoor formaldehyde was 0.265 +/- 0.07 mg/m3, and mean indoor phenol was 4.65 +/- 2.96 mg/m3. Specific IgE/IgG against formaldehyde-albumin was not found at the beginning. Four students developed specific IgE against formaldehyde-albumin (RAST classes of > or =2.0), and all four also had specific IgE in the ELISA, but IgG against formaldehyde-albumin was not found. Specific IgE against phenol-albumin was not seen. Itch and paresthesia of the hands (P<0.00001), dizziness (P<0.008), burning eyes (P<0.01), headache, sneezing, epistaxis, gingival bleeding, oral or pharyngeal itch, and shortness of breath were experienced. CONCLUSIONS: Formaldehyde exposure during dissecting may induce specific IgE, but not IgG, against formaldehyde-albumin. Sensitization did not correlate with symptoms.     

High levels of histidine decarboxylase in the striatum of mice and rats

Stachybotrys microspora triprenyl phenol-7 (SMTP-7) is a novel fibrinolytic agent with anti-inflammatory effect. Previous study demonstrated that SMTP-7 further ameliorated infarction volume in a mouse embolic stroke model compared with tissue type plasminogen activator (tPA), but the reason SMTP-7 has more beneficial effect than tPA has not yet been determined. In the present study, we investigated whether SMTP-7 has an intrinsic neuroprotective effect against transient focal cerebral ischemia (tFCI). Sprague-Dawley rats were subjected to tFCI by intraluminal middle cerebral artery occlusion for 2 h. Following induction of tFCI, rats were randomized into two groups based on the agent administered: SMTP-7 group and vehicle group. We examined cerebral infarction volume 24 h after reperfusion, and evaluated superoxide production, the expressions of nitrotyrosine and matrix metalloproteinase-9 (MMP-9), which play major roles in secondary brain injury and hemorrhagic transformation. The findings showed that SMTP-7 significantly suppressed superoxide production, the expression of nitrotyrosine and MMP-9 after tFCI, and consequently attenuated ischemic neuronal damage. These results suggest that SMTP-7 has an intrinsic neuroprotective effect on ischemia/reperfusion injury through the suppression of oxidative stress and MMP-9 activation.     

二氧化钛超细粒子的制备及其光催化降解含酚溶液

采用非离子型Ｗ／Ｏ微乳液中水核作为“微反应器”制备水合ＴｉＯ２，在不同温度煅烧得到形态不同的ＴｉＯ２超细粒子；研究ＴｉＯ２粒子作为光催化剂降解含酚溶液的催化活性。结果表明，前驱体煅烧温度对粒子光催化活性有明显影响，煅烧温度低、粒径小、比表面积大的粒子催化活性强；酚去除率随ＴｉＯ２浓度升高而升高，但存在最大值；通入适量氧气有助于酚的去除，但通氧速率过大酚去除率反而下降；用酚氧离子在ＴｉＯ２表面吸附机     

异丙酚、芬太尼联合麻黄素用于无痛人流麻醉的临床观察

目的 观察异丙酚和芬太尼联用麻黄素改善无痛人流术不良反应的效果.方法 60例自愿接受无痛人流者,随机分为异丙酚-芬太尼组(对照组)和异丙酚-芬太尼-麻黄素组(观察组),记录收缩压(SBP)、舒张压(DBP)、血氧饱和度(SpO2)、呼气末二氧化碳分压(PETCO2)等指标.结果 对照组给药后60秒SBP、DBP有所下降,且药物注射后4个时点SBP均有下降;观察组则无类似显著改变.对照组给药后60、120、180秒时SpO2均有一定程度下降,且有2例出现短暂呼吸暂停;观察组患者SpO2仅轻度下降.对照组患者给药后4个时点PETCO2均有明显升高;观察组患者PETCO2稍有升高.结论 观察组患者血压、SpO2等更平稳,麻黄素可以改善异丙酚和芬太尼相关的心血管系统抑制和通气功能障碍.     

液晶作为气相色谱固定液的研究

本文总结了作者近年的研究工作。内容包括液晶固定液选择性规律的探讨,液晶色谱柱制备方法的探索,及应用液晶柱分离各种二元取代苯异构体、二甲酚和三甲酚异构体、煤焦油各馏分。所获得的令人满意的分离结果,说明了液晶固定液的独特选择性。     

分光光度法测定大鼠小肠液中替硝唑和酚红的浓度

目的：建立大鼠小肠液中替唑和酚红的分光光度测定方法,方法：以pH8磷酸盐缓冲液的溶剂,采用双小法在558nm和570nm测定酚红,以多元回归分光光度法在290,300,318,340nm测定替硝唑。结果：替硝唑和酚回收率分别为95．9％－100．2％和98．8％－102．5％,日内精密度与日间精密度小于3．9％,结论：所建立的方法适用大鼠肠液中替硝唑和酚红的测定。     

半夏总蛋白提取及其动态变化研究

目的优选出半夏总蛋白提取的最适方法并研究不同生长时期总蛋白量及成分的变化,为半夏药用成分的监控及合理采收提供科学依据。方法采用丙酮沉淀法、95%(NH4)2SO4盐析法、TCA-丙酮法和Tris-饱和酚法提取半夏总蛋白,筛选半夏总蛋白提取的最佳方法。分别于半夏出芽期、全苗期、珠芽期、佛焰苞期及倒苗期采集样品,分为新鲜组和干燥处理组,提取样品总蛋白,进行SDS-PAGE电泳检测及Bradford浓度测定。结果丙酮沉淀法、95%(NH4)2SO4盐析法、TCA-丙酮法和Tris-饱和酚法提取的半夏总蛋白量分别为0.369、0.678、1.082、0.493 mg/mL;新鲜半夏5个不同生长时期总蛋白量占块茎的质量分数分别为出芽期4.53 mg/g、全苗期2.28 mg/g、珠芽期2.79 mg/g、佛焰苞期7.61 mg/g、倒苗期10.21 mg/g;干燥半夏5个不同生长时期总蛋白量占块茎的质量分数分别为出芽期31.85 mg/g、全苗期18.52 mg/g、珠芽期42.08 mg/g、佛焰苞期28.56 mg/g、倒苗期56.84 mg/g;新鲜半夏块茎中蛋白含有15条蛋白带,干燥处理半夏块茎中蛋白含有5条蛋白带。结论 TCA-丙酮法是半夏总蛋白提取的最佳方法,不同生长时期的半夏块茎中蛋白成分各异,倒苗期总蛋白量最高。