青冈林的能量生态研究Ⅲ.青冈林的能量损耗

运用红外线分析仪在室外研究了青冈林的能量损耗及其与生理、生态因子的关系．结果表明：能量损耗为2829587．46kJ／（m2·a）,其中呼吸能量损耗为76288．06kJ／（m2·a）,蒸腾能量损耗为2753249．40kJ／（m2·a）．能量损耗以七月份最高．呼吸能量损耗日变化基本上呈“单峰”,其主导因子为温度．但亦出现“午休”,其日变化类型表现为“双峰”曲线．蒸腾能量损耗速率的变化亦有“单峰”、“双峰”和“杂合”三种类型,其主导因子为空气相对湿度．     

Recovery process of respiratory muscle strength in patients following stroke: A Pilot Study

Objective: To determine the recovery process of respiratory muscle strength during 3 months following stroke, and to investigate the association of change in respiratory muscle strength and physical functions. Additionally, we compared respiratory muscle strength with those of healthy subjects. Method: In this prospective, observational study, 19 stroke patients and 19 healthy subjects were enrolled. Maximal inspiratory pressure (MIP), maximal expiratory pressure (MEP), motricity index, trunk control test, 6-minute walk test (6MWT) and functional independence measure were assessed at 1, 2, and 3 months from stroke onset in stroke patients. MIP and MEP were assessed at arbitrary times in healthy subjects. Repeated one-way analysis of variance with Bonferroni post-hoc test was used to compare the change in respiratory muscle strength in each period in stroke patients. Pearson''s correlation coefficient was computed for changes in respiratory muscle strength and physical functions. Student''s t-test was used to compare respiratory muscle strength between stroke patients at 3 months from onset and healthy subjects. Results: MIP was significantly increased at 3 months compared to 1 month. MEP was significantly increased in 2 months and 3 months, compared to 1 month. MIP changes associated with 6MWT changes. Compared to healthy subjects, MIP and MEP at 3 months were significantly lower in stroke patients. Conclusion: Respiratory muscle strength significantly increased during 3 months following stroke. However, the trend of recovery may be different. MIP changes may associated with walking endurance changes. During 3 months following stroke, respiratory muscle strength did not recover to healthy subjects.     

超高效液相色谱-串联质谱法同时检测地表水中18种药物与个人护理品的残留量

采用固相萃取对水样进行预处理,建立了同时检测地表水中包括抗生素、β-阻滞剂、驱蚊剂、抗癫痫药、中枢神经兴奋剂、血脂调节剂、非甾体抗炎药、杀菌消毒剂在内的18种药物与个人护理品的超高效液相色谱-串联质谱分析方法。采用中性条件萃取水样,控制上样流速为2 mL/min,用甲醇-乙腈(1:1, v/v)溶液洗脱。纯水中的平均加标回收率为53.9%～112%,相对标准偏差为2.6%～15.3%(n=6);以地表水样加标100 ng/L为样品,目标分析物平均回收率为45.1%～156.6%,相对标准偏差为2.4%～15.7%(n=6)。结果表明,本方法可同时精确检测地表水样中的18种分析物,方法验证结果表明所建立的方法可靠。用该方法分析杭州余杭塘河水,结果检出9种分析物,其中咖啡因平均质量浓度达550.7 ng/L。结果表明该方法可靠。     

呼吸缺陷型酵母菌株的离子束辐射敏感性研究

选取一株由离子束辐照诱变获得的呼吸缺陷型酵母菌株，研究其在不同离子辐照剂量范围的辐射敏感性。结果发现，呼吸缺陷型酵母菌株因其线粒体及线粒体DNA发生突变，在离子束辐照时，在低剂量区域表现出较高辐射敏感性，在高剂量区则表现出对于辐射的抗性。     

Aspekte und Beispiele der Anwendung der Methoden der Thermischen Analyse in Industriellen Bereichen

The methods of thermal analysis are used in many ways in academic research institutions and in industry. The exchange of information leads to an activation of such studies. However, the differences in problems, methods and requirements result in communication problems between the users in the above groups. This may lead to regrettable deficits. Two industrial examples demonstrate that thermoanalytical investigations give useful problem solutions, though they do not meet the requirements of academic research.This revised version was published online in November 2005 with corrections to the Cover Date.     

Thermal Activities in Greece

The history of the Hellenic Society of Thermal Analysis (HSTA) is outlined. A review of thermal activities in Greece is presented, concentrating on polymeric and inorganic materials, minerals and pharmaceuticals. Some examples are given. This revised version was published online in July 2006 with corrections to the Cover Date.     

Differential pulse voltammetric determination of famotidine

A differential pulse voltammetric method for the determination of famotidine in pharmaceutical preparations is described. The method is based on electrochemical oxidation of famotidine at a glassy carbon or platinum electrode. The proposed method shows good reproducibility, and sample preparation is simple.     

甲氧氯普胺的流动注射光度分析

基于在盐酸介质中,利用甲氧氯普胺－亚硝酸钠－α－萘胺的重氮化－偶合反应,建立了流动注射光度法测定甲氯普胺的新方法,利用单纯形优化法选择了最佳实验条件。方法的线性范围为0.0-30mg/L,进样频率为160／h。11次重复测定的相对标准偏差小于0.6％,该方法已成功用于药物中甲氧氯普胺含量的测定,测定结果与药典法对照,并经统计学处理,结果满意。     

Flow-Injection Fluorimetric Determination of Thiamine in Pharmaceutical Preparations

 A new fluorimetric procedure for the determination of thiamine using flow injection analysis is proposed. The method is based on the derivatization reaction of the primary amine group with o-phthalaldehyde in the presence of 2-mercaptoethanol using fluorimetric detection. The calibration graph based on peak area was linear in the range 0.2–6 ng mL⁻¹. The detection limit was close to 0.1 ng mL⁻¹. The method was applied to the determination of the vitamin in commercial pharmaceutical preparations. Received March 31, 1999. Revision October 15, 1999.     

儿童反复呼吸道感染与发锌、铁、铜、钙关系分析

为了解反复呼吸道感染与头发微量元素的关系,测定了52例易感儿及41例健康儿童发锌,铁,铜,钙含量,结果显示,易感儿发锌含量极显著低于健康组（P＜0．01）,发钙偏低,0．05＞P＞0．01,发铁,铅含 量基本正常,两组无显著差异,本研究表明儿童反复呼吸道感染与缺锌,缺钙有关。