荞麦花粉抗贫血作用的实验研究

用荞麦花粉的水提取液进行了抗大白鼠缺铁性贫血的研究，结果表明：荞麦花粉具有和硫酸亚铁相似的抗缺铁性贫血作用．饮用荞麦花粉提取液３５ｄ的大白鼠，生长发育良好，主要脏器未见损害．该研究为荞麦花粉的开发利用提供了实验依据．     

油菜和向日葵花粉的成分分析及其蛋白质营养评价

<正> 花粉在古代就曾作为强身保健食品。美、英两国的科学家曾分析了花粉的成分,发现花粉由96种元素组成,其中有维生素、矿物质、酶、蛋白质和某些其它物质。美国明尼苏达大学曾做过花粉对动物的增重实验。当41～150日龄小猪饲料中添加2～3％的玉米花粉时,体重增长明显快于对照组,     

Polyclonal and allergen-induced cytokine responses in children with elevated immunoglobulin E but no atopic disease

BACKGROUND: Reduced Th1 and elevated Th2 cytokine responses are considered to be a principal mechanism in the generation of the inflammation leading to the manifestations of atopic disease in the skin of atopic dermatitis and in the airways of asthma. If reduced Th1 and elevated Th2 responses are principal determinants of the manifestation of atopic disease it might be expected that subjects with established disease would exhibit differences in their cytokine profiles as compared with atopic patients without clinical disease. OBJECTIVE: To determine whether asymptomatic atopic children exhibit a cytokine imbalance similar to that seen in patients with established atopic disease or if they behave like non-atopic controls. Cytokine responses in a group of children with elevated IgE but no clinical manifestations of disease, atopic children with established disease and non-atopic controls were compared. METHODS: We examined allergen-induced (house dust mite, HDM, rye grass pollen and RYE) cytokine responses in parallel with polyclonal (staphylococcal enterotoxin B, SEB) cytokine responses in a group of children with elevated serum IgE levels without current or past evidence of atopic disease (median age 6.6 years) and compared these with a non-atopic control group (median age 6.5 years) and a group of children with atopic disease (median age 6.7 years). RESULTS: Symptomatic atopic children had reduced SEB-induced IFN-gamma and increased SEB-induced IL-4 and IL-5 as compared with non-atopic controls. In contrast, SEB-induced IFN-gamma, IL-4 and IL-5 production in asymptomatic atopics was not significantly different from the non-atopic control subjects. Allergen-induced Th1 (IFN-gamma) and Th2 (IL-5 and IL-13) cytokine production was increased in both symptomatic atopics and asymptomatic atopics when compared with non-atopic controls. CONCLUSION: The defect in polyclonally induced IFN-gamma production was associated with the clinical manifestation of atopic disease but not the atopic stateper se. This suggests that the global reduction in IFN-gamma is the key determinant of the development of overt atopic disease. In contrast, elevated allergen-induced Th2 cytokine responses in children related to the atopic state per se irrespective of the presence of clinical atopic disease.     

荔枝壳红色素的提取及稳定性观察

以荔枝壳为原料，在酸性条件下浸提荔枝壳红色素，并对其稳定性进行了研究，结果表明，该色素在酸性条件下对光、热、常用食品添加剂均具有较好的稳定性。     

松花粉对人肺成纤维细胞增殖活性影响的实验研究

目的 :研究松花粉对人肺成纤维细胞增殖的影响 ,探讨中药松花粉可能的作用机理。方法 :松花粉作用于人肺成纤维细胞不同时间后观察细胞生长速度 ,应用台盼蓝对细胞进行染色 ,测定细胞死亡率。松花粉浓度分别为 10 0、2 0 0、40 0、80 0mg·L-1,以未经松花粉处理的细胞为对照。结果 :松花粉作用于人肺成纤维细胞能够明显促进细胞群体倍增水平 ,降低死亡细胞数目 ,且呈剂量依赖关系。结论 :松花粉可通过促进细胞生长而影响细胞增殖。     

Pollen extracts reduce the hepatotoxicity of paracetamol in mice

Cernitins are preparations obtained from plant pollen which contain numerous compounds of potential biological significance. This work deals with the influence of cernitins upon acute paracetamol toxicity in mice. The survival rate and indices of hepatic injury: aminotransferase and alkaline phosphatase activities, bilirubin level in serum, glutathione and cytochrome P-450 content in liver, liver weight, histopathologic picture of the liver and presence of glycogen and lipids in stained liver sections, under different experimental protocols, were determined. It was found that cernitins are able to increase the survival rate of mice and reduce liver injury in acute paracetamol poisoning. Cernitins are more effective when administered after, rather than before, a dose of paracetamol. The possible mechanism through which cernitins may act is discussed.     

鸡矢藤提取物对小白鼠离体子宫的作用

鸡矢藤[Paederia Scandens]提取物0.32mg 加入营养槽内,对小白鼠各期离体子宫的收缩张力、收缩强度、收缩频率以及子宫活动力均有增强作用。与给药前比较,诱导期组分别增加85%、47%、21%和72%;动情期组分别增加70%、77%、41%和41%;非动情组分别增加47%、76%、62%和66%,而且三组间作用无显著性差异。本品还能增强 PGE_2对小白鼠离体子宫的收缩张力、收缩强度、收缩频率以及子宫活动力。与 PGE_2的作用比较,分别增加34%、39%、9%和45%,但收缩频率增加无统计学意义(P>0.05)。上述结果表明,鸡矢藤提取物对小鼠子宫有显著性兴奋作用,而且还能增强PGE_2对小鼠子宫兴奋作用,其机制尚待进一步研究。     

银杏叶提取物中的芦丁含量测定

用紫外分光光度法测定银杏叶提取物中芦丁的含量，结果表明：以６０％丙酮或７０％乙醇提取银杏叶，所得提取物的芦丁含量为３３．２７％～４３．３８％。     

辐照油菜花粉自由基测定

本文采用电子顺磁共振技术测定经Ｃｏ~（６０）γ射线８ＫＧｙ辐照后的油菜花粉中自由基的含量水平。测定结果表明Ｃｏ~（６０）γ射线辐照引起油菜花粉中自由基含量明显升高，但在室温下存放，很快下降至正常水平。     

安徽省小麦中镰刀菌毒素的分布研究

用薄层层析法对安徽宣城、芜湖等5个地区150份小麦进行了镰刀菌毒素脱氧雪腐镰刀菌烯醇和玉米赤霉烯酮的分布研究。脱氧雪腐镰刀菌烯醇的阳性率和平均含量为52.7%和337ppb。最高达4000ppb。地区间阳性率和平均含量有明显差异。小麦中脱氧雪腐镰刀菌烯醇的分布规律与安徽省小麦赤霉病的流行规律相一致。117份小麦中玉米赤霉烯酮的阳性率为30.8%,平均含量24ppb,地区间未见明显差别。小麦中赤霉病麦率平均为0.49%,地区间也有明显差异。经相关分析小麦中脱氧雪腐镰刀菌烯醇含量与赤霉病麦率之间有高度相关。