日本茶树遗传育种研究

本文介绍了日本茶树遗传育种研究的发展过程。日本茶树育种的发展,主要得益于海外茶树品种资源的引进和利用,茶树育种的目标,早期注重红茶品种选育,随后以绿茶品种选育为主,进入８０年代后期,又侧重于多抗品种的培育,优良无性系茶树品种的推广,促进了茶叶产量的提高,同时加快了茶叶加工和茶园机械化的发展,提高了茶叶生产的效益。茶树品种音一化和遗传育种资源不足是日本茶树育种研究存在的主要问题,海外茶的品种资源的收     

茶叶在养鸡中的妙用

<正>茶叶中含茶多酚、茶碱、咖啡因、儿茶素、叶黄素及多种维生素,并含植物杀菌素,是我国传统的保健饮品。畜牧兽医科技人员将茶叶用于养鸡业生产,取得了可喜的效果。1.增重。在肉鸡饲料中添加2%经糖化处理的茶渣,圈养30天,可多增重800克。     

生活健康

西红柿疗疾十法治皮肤病。将鲜熟西红柿去皮和籽后捣烂敷患处,每日2～3次,可治真菌、感染性肤病。美容、防衰老。将鲜熟西红柿捣烂取汁加少许白糖,每天用其涂     

茶叶掺假的鉴别检验

茶叶掺假的鉴别检验河北农业技术师范学院高海生茶叶为山茶科植物茶树的叶子经加工制成的饮品。其主要风味成分为咖啡碱、单宁、茶多酚、茶氨酸、果酸物质等。茶叶根据制造方法不同，可分为绿茶、黄茶、黑茶、青茶、白茶和红茶六大类，其中以绿茶和红茶较为多见。茶叶掺假...     

土壤母质与茶叶质量的关系初探

Six tea plantations with different soil-forming parent naterials,the same tea variety and tea age and similar landforms and management were selected to conduct a systematic study on the realtionship between soil properties and tea quality.The results showed that the quality of tea grown on the soil derived from dolomites,Quaternary red clays,were inferior.Further study showed that sandy soils were beneficial to improving amino acid content of tea ,and clayey soils made it decrease;high content of bases might decrease the contents of tea polypenols,caffeine,water extracts,but promote the content of amino acds;available phosphorous was significantly positively correlated with water extracts ,but significantly negatively correlated with caffeine;slowly avaiable potassium was positively correlated with amino acid content .Soil parent materials should be regarded as an important factor in eveluating the adatability of tea to soils.     

咖啡因对猪精液常温保存效果的观察报告

<正>本人于1991年1月至1992年5月,对公猪精液常温保存添加咖啡因的保存效果进行了试验,现将结果报导如下。 一、材料和方法 1.供试猪精液:采自县良种站饲养的正常成年的新Ⅲ系长白种公猪,使用浓分清液,精于活力达0.85以上。 2.供试母猪:本县农户饲养的正常经产的东山母猪。 3.稀释液配方组成。基础液:口服葡萄糖4.5g、乙二胺四乙酸二钠0.2g、二水柠檬酸钠0.28、碳酸氢钠0.1g、蒸馏水100ml。稀释液:基础液(容量)94％,卵黄(容量)6％、青霉素1000IV/ml、双氢链霉素1000μg/ml。     

咖啡及其制品中咖啡因HPLC测定的前处理方法研究

采用5种前处理方法分别对5个样品进行处理,并对HPLC测定咖啡因含量的前处理方法进行优化和改进,建立了3种准确、快速、安全的适宜不同样品的咖啡因提取测定方法,其中三氯甲烷超声萃取法效果最佳。该方法测定FAPAS对照样品的咖啡因,其含量为395.47 mg/kg,相对误差为0.9%,回收率达100.97%。该方法操作简单、耗时少、精密度及准确度高、测定适用范围广。     

反相高效液相色谱法测定茶叶和速溶咖啡中咖啡因的含量

建立了用反相高效液相色谱法测定水仙绿茶、铁观音和速溶咖啡中咖啡因含量的方法,并考察了不同水温对茶叶中咖啡因溶出量的影响.方法检出限为49.68ng/L,精密度分别是2.65%、2.96%、2.77%.     

Changes on Characteristic Components During Shoots Development in Camellia Sinensis

Fresh leaves of tea cultivar Shuchazao were harvested from five different stages of shoot development including single-bud （SB）,one leaf and one bud （BL1）,two leaves and one bud （BL2）,three leaves and one bud （BL3） and mature leaves （ML,including five leaves）.The contents of tea-specific components,including caffeine,catechins and amino acids,in tea leaves were extracted and analyzed using the HPLC technique.The results showed that the content of caffeine in the buds in BL3 stage was generally the highest,while it did not change much in SB,BL1 and BL2 stages.The content of caffeine in the leaves at the same leaf-age was similar in five different development stages.The total contents of catechins in the first leaf were higher than that in the buds in all five development stages,and it was the highest in the first leaf at BL1 stage,but it decreased with the increase of the leaf-age.As far as the monomeric catechins were concerned,non-ester type catechins and ester type catechins can be detected in the buds or leaves in the five development stages.The majority of catechins were epigallocatechingallate （EGCG）,which showed a similar variation tendency as that of total catechins.However,the contents of non-ester type catechins such as epicatechingallate （EGC）,epicatechin （EC） and gallocatechin （GC） were higher in buds than in leaves,which were opposite to the content variation trends of ester type catechins in the course of shoot development.Theanine was the major amino acids in all development stages of tender shoots,and its content in the stage of single-bud was the highest.The content of theanine in buds was three or four times higher than in leaves,and the older the leaf-age was,the less theanine existed in the leaves.     

贵定鸟王种茶叶中咖啡因和儿茶素类检测分析

[目的]对贵州省贵定县鸟王种茶叶中咖啡因和儿茶素类含量进行检测分析及系统研究。[方法]以茶叶中重要的生物活性物质咖啡因和儿茶素类为研究对象,利用高效液相色谱法同时测定鸟王种茶叶中咖啡因和儿茶素类的含量,并对鸟王茶不同类型茶叶的咖啡因和儿茶素类含量进行对比分析。[结果]试验得出,咖啡因和儿茶素类在鸟王种茶新叶与成熟叶之间存在显著差异,新叶中咖啡因和儿茶素类含量高于成熟叶中的含量。[结论]研究可为鸟王茶的生产加工选取原料提供科学的依据,同时为鸟王茶的种植推广与品牌建立提供数据支撑。