抗坏血酸和胶原蛋白的皮肤吸收速率及其对老化肌肤的作用

目的：探讨和比较应用抗坏血酸及胶原蛋白对于老化肌肤的疗效和吸收速率.方法：使用抗坏血酸和胶原蛋白涂抹于健康皮肤和问题皮肤之上,观察其荧光与反射光谱的变化情况,采用皮肤光谱对皮肤组织中胶原蛋白的含量进行检验,分析和总结不同部位皮肤对不同浓度的抗坏血酸和胶原蛋白的吸收程度和修复效果.结果：皮肤可有效吸收适当浓度的抗坏血酸或胶原蛋白,适当比例的混合液可获得较好的疗效.其中0.1％的胶原蛋白溶液吸收率高于0.5％和1.0％的同类型溶液,抗皱效果较好;20％的抗坏血酸即可取得良好的淡斑效果.结论：抗坏血酸或胶原蛋白浓度适宜时皮肤吸收效果较好,混合使用浓度适当的抗坏血酸及胶原蛋白可取得较好的疗效.     

Acid Phosphatase as a Marker in Malaria

The serum acid phosphatase (ACP) activity and Hemoglobin (Hb) levels were measured in malaria patients and nonmalarial fever patients. The results were compared with normal healthy control subjects. ACP was significantly increased (P < 0.001) in all the malaria patients. ACP was significantly higher in Plasmodium falcifarum malaria and mixed malaria when compared to Plasmodium vivax malaria. Hb levels were significantly decreased in all the malaria patients which indicates that malaria parasite uses host erythrocyte Hb as a major nutrient source. There is negative correlation(r = −0.478) between ACP and Hb in malaria patients, which is highly significant. These results suggest that the measurement of ACP could be used as a marker for malaria.     

我国乳酸菌饮料产业化现状及发展策略

本文首先阐述了乳酸菌饮料概念、分类和保健功能,分析了乳酸菌饮料制作工艺,并结合国内外乳酸菌饮料市场分析、发展情况以及国内乳酸菌饮料市场存在的问题和弊端,提出了我国乳酸菌饮料发展战略。     

大同市酸雨污染近况浅析

本文主要根据大同市近10年规划的酸雨数据观测,对大同市的酸雨状况进行了分析研究,主要做了如下几个方面的工作:(1)对大同市1995年～2005年近十年的降水特征进行了分析,分析了降水的化学组成、酸雨的时间分布、酸雨的空间分布以及各主要离子的分布。(2)分析了大同市酸雨成因,并指出了酸雨防治对策。     

谷氨酸钠溶液514nm激光拉曼光谱受环境光影响的研究

探讨了环境光的存在对谷氨酸钠溶液的514nm绿色激光激发的拉曼光谱的影响。研究表明不同的环境光、自然光和室内荧光灯光均会对514nm激光拉曼光谱产生干扰,存在着特征干扰峰。自然阳光干扰较小;而荧光灯光表现为1127、2107cm^-1和2170cm^-1等3个明显尖锐的脉冲峰,不能忽略。建议在进行谷氨酸钠溶液514nm绿色激光拉曼光谱检测时,须在暗室或暗罩中进行,以完全隔离环境光的影响。     

Effect of spironolactone on acid and alkaline phosphatase in the testes of albino rat

The biological activity of the mineralocorticoid antagonist, spironolactone depend upon its metabolism. In this study the effect of diuretic drug compound spironolactone on the acid and alkaline phosphatase in the testes of albino rat. The drug spironolactone was administered orally daily for 7^th, 14^th and 21^st days at the dose of 100 mg/kg body weight. Among them, the side effects of drug are that the degradation of alkaline phosphatase in the testes; while acid phosphatase increased significantly may be due to 7a-thiospironolactone is a tissue metabolite of spironolactone and may contribute to the testicular enzymes, therapeutic actions and some other side effects. It is suggested that the decrease and increase of alkaline and acid phosphatase in the testes of albino rat are the due to the side effects of spironolactone drug compound.     

维生素C对苹果多酚氧化酶活力的影响

本文探讨了抗坏血酸在不同温度、酸度和浓度条件下对苹果片中多酚氧化酶活力的抑制效果。结果表明 ,该酶活力在 1 .0 %～ 1 .5 %的抗坏血酸溶液中显著降低 ,1 .0 %抗坏血酸在pH3或 pH4的条件下 ,能显著降低酶的活力 ,在 5 0～ 60℃范围内 1 5min能显著降低酶褐变。     

Lipid composition and amino acid uptake during rotavirus infection and protection with trypsin inhibitor in malnourished infant mice

The aim of the study was to evaluate the influence of rotavirus (RV) and soyabean trypsin inhibitor (TI) on lipid composition and uptake of glucose and glycine in rotavirus (RV) infected malnourished (PEM) infant mice. Malnutrition was achieved in animals by doubling the litter size. Cholesterol (Ch) and phospholipd (PL) contents, uptake levels of glucose and glycine were determined in jejunum and ileum portion of small intestine. Increase in Ch/PL ratios was observed in PEM+RV group. The levels became comparable in PEM+RV+TI as compared to PEM. Uptake levels of glucose and glycine increased in PEM animals. With rotavirus (PEM+RV+TI group), the levels decreased which became comparable to PEM. Changes in uptake and lipid composition with rotavirus and trypsin inhibitor may be responsible for altering membrane fluidity and organization during rotavirus diarrhea. The results establish the importance of trypsin inhibitor during oral infection with rotavirus.     

透明质酸在化妆品中的应用

透明质酸是具有特殊功能的一种线性大分子粘多糖，具有独特的保湿性能。它是构成皮肤细胞间质和细胞外基质的主要成分，具保水作用及高效的自由基“清道夫”的作用等。透明质酸作为一种理想的天然保湿因子，广泛应用于化妆品中。     

石家庄市浅层地下水中硝酸盐氮污染现状及原因分析

随着工业化和城镇化建设的推进，石家庄市区的浅层地下水中硝酸盐氮污染日趋严重．通过现场采样、分析、测试，反映市区的污染现状，探讨其污染原因，并提出相应防治措施．