茶多酚的功效及在缓解家禽热应激上的应用概述

茶多酚具有抗氧化能力强、抑菌消炎、增强免疫力等特点,可缓解氧化应激,提高家禽的生产性能.综述了茶多酚的性质及功效,热应激对家禽的影响,茶多酚在缓解家禽热应激上的应用效果,旨在为茶多酚在热应激上的应用研究奠定基础.     

茶多酚的提取工艺及其应用机理研究进展

茶多酚是茶叶中多酚类物质的总称,在食品、油脂、保健、医药、日化、精细化工等领域都有广泛的应用。对茶多酚提取方法及应用机理作一综述,以亟增加畜牧业从业人员对茶多酚的认识,扩大茶多酚在养殖业中的应用程度。     

茶多酚的抗氧化性及其在畜牧生产中的应用

茶叶中的多羟基酚类化合物简称茶多酚,是一种天然的抗氧化剂.茶多酚具有抗氧化、改善生产性能、促进肠道健康等作用,在畜牧生产中广泛应用.本文主要阐述了茶多酚的抗氧化性及其在畜牧生产中的应用效果.     

肉鸡日粮中茶多酚添加水平探讨

茶多酚具有脂质抗氧化作用、降低胆固醇、提高免疫、提高生产性能等作用.茶多酚作为饲料添加剂具有安全、无残留等优点.近年来在畜牧业上有较广泛的应用研究,但茶多酚作为饲料添加剂也有一定的副作用,茶多酚属多羟基酚类化合物,在动物体内常常与微量元素络合,从而影响微量元素的吸收,茶多酚使用过多时会使动物的生产性能下降,且两者之间存在显著剂量关系[1].为了研究茶多酚作为饲料添加剂在肉鸡日粮中的适宜添加水平,特进行本试验.     

茶多酚的生物学功能及在鸡生产中的应用

茶多酚具有多种生物学功能,加入到禽畜日粮中能全面提升饲养效果。对茶多酚的生物学功能及在鸡生产中的应用进行综述,展望了茶多酚在饲料工业的应用前景。     

茶多酚的生物学功能及其在养猪生产中的应用

茶多酚(Tea polyphenols,TP)是一种从茶叶中提取一种多酚类物质,具有诸多生物学活性。众多研究证实茶多酚具有改善机体抗氧化、免疫性能、肠道菌群平衡、脂肪沉积调控以及抑菌等诸多生物学功能,在养猪生产中具有积极的应用效果。文章结合近年的相关研究,对茶多酚的提取工艺、生物学功能以及在养猪生产中的应用现状展开综述,以其为在养猪生产中合理利用茶多酚提供应用依据和实践参考。     

茶多酚及其生物学功能

茶多酚是从茶叶中提取的多羟基酚类物质,具有独特的生物学特性.本文简述了茶多酚的理化性质、提取方法、在动物体内的分布和代谢以及其重要的生物学功能;并展望了其在畜牧业生产中的应用前景.     

茶多酚超低温浓缩设备研究

茶多酚在食品、医药、日化、轻化、保健等方面有诸多应用,市场需求量巨大,但茶多酚组成复杂,各有效成分对温度比较敏感,沿用传统的设备进行浓缩影响了茶多酚纯度、品质和得率,限制了其应用范围。茶多酚超低温浓缩设备采用自动推进式刮板薄膜成形技术和低负压蒸发技术,实现了超低温加热、超低温蒸发,降低蒸发温度,增加蒸发效果,使茶多酚活性成分在浓缩过程中免受高温破坏,保证了终端产品的品质。     

新型饲料添加剂--茶多酚抗氧化性的研究和应用概况

本文简述了茶多酚的抗氧化性质,剖析了茶多酚的作用机理,阐述了茶多酚的研究与应用进展,并展望了茶多酚在食品和饲料工业及畜牧养殖业中的应用前景。     

茶多酚的免疫调节作用及应用

茶多酚是茶叶中多酚类化合物的总称,具有广泛的生理活性.茶多酚能诱导动物免疫系统的多种细胞因子,促进干扰素、白细胞介素等的合成,具有清除体内自由基、抗脂质过氧化作用,能激活巨噬细胞(Mф)、自然杀伤(NK)细胞和B、T淋巴细胞,激活补体系统,提高抗体水平.茶多酚在抗氧化、抑菌、抗病毒、抗肿瘤、防辐射、降血糖和血脂及改善动物生产性能等方面具有广泛的应用前景.     

Utilization of tea grounds as feedstuff for ruminant

Researches on tea have been developed for decades, which prove that tea, especially green tea, has multiple functional components. With the rapid development of beverage industry, the resultant large amounts of tea grounds attract great attention. However, unreasonable utilization of tea grounds would lead to great waste and environmental pollution, especially in summer. In view of the high nutritive value and multiple functional components, tea grounds could be used as feedstuff. By now, researches of tea grounds as feedstuff are mainly on ruminant, as the utilization on other animals is limited to lower level due to high fiber content. Therefore, the following review will begin with a brief introduction of tea grounds and the possible utilization of tea grounds as feedstuff, and then elaborate on the application of ensiling and total mixed ration on ruminant. Apart from the fermentation quality, nutritive value is also provided to assess feasibilities of using tea grounds as feedstuff resources. Finally, a summary on the utilization situation and future direction of using tea grounds as feedstuff is provided in this review.     

茶饲料对猪生长性能及肉品质的研究进展

本文概述了茶叶及其加工副产物在猪饲料化利用方面的国内外研究进展,具体阐述了茶叶、茶渣、茶叶提取物以及发酵茶叶在猪饲粮中的应用效果.茶叶及其加工副产物是理想的猪饲料添加剂,是对茶资源的充分综合利用,其饲料化应用前景广阔.     

Utilization of tea grounds as feedstuff for ruminant

Researches on tea have been developed for decades, which prove that tea, especially green tea, has multiple functional components. With the rapid development of beverage industry, the resultant large amounts of tea grounds attract great attention. However, unreasonable utilization of tea grounds would lead to great waste and environmental pollution, especially in summer. In view of the high nutritive value and multiple functional components, tea grounds could be used as feedstuff. By now, researches of tea grounds as feedstuff are mainly on ruminant, as the utilization on other animals is limited to lower level due to high fiber content. Therefore, the following review will begin with a brief introduction of tea grounds and the possible utilization of tea grounds as feedstuff, and then elaborate on the application of ensiling and total mixed ration on ruminant. Apart from the fermentation quality, nutritive value is also provided to assess feasibilities of using tea grounds as feedstuff resources. Finally, a summary on the utilization situation and future direction of using tea grounds as feedstuff is provided in this review.     

Nutritional applications and beneficial health applications of green tea and l-theanine in some animal species: A review

Green tea (Camellia sinensis) is a popular herbal plant with abundant health benefits, and thus, it has been used as a potent antioxidant for a long time. Based on the available literature, the diversity and the availability of multifunctional compounds in green tea offer its noteworthy potential against many diseases such as liver and heart diseases, inflammatory conditions and different metabolic syndromes. Owing to its bioactive constituents including caffeine, amino acids, l -theanine, polyphenols/flavonoids and carbohydrates among other potent molecules, green tea has many pharmacological and physiological effects. The effects of green tea include anti-oxidative, anti-inflammatory, anti-arthritic, anti-stress, hypolipidaemic, hypocholesterolaemic, skin/collagen protective, hepatoprotective, anti-diabetic, anti-microbial, anti-infective, anti-parasitic, anti-cancerous, inhibition of tumorigenesis and angiogenesis, anti-mutagenic, and memory and bone health-improving activities. Apart from its utilization in humans, green tea has also played a significant role in livestock production such as in dairy, piggery, goatry and poultry industries. Supplementation of animal feeds with green tea and its products is in line with the modern concepts of organic livestock production. Hence, incorporating green tea or green tea by-products into the diet of poultry and other livestock can enhance the value of the products obtained from these animals. Herein, an effort is made to extend the knowledge on the importance and useful applications of green tea and its important constituents in animal production including poultry. This review will be a guideline for researchers and entrepreneurs who want to explore the utilization of feeds supplemented with green tea and green tea by-products for the enhancement of livestock production.     

Antioxidant mechanism of tea polyphenols and its impact on health benefits

Tea trees have a long history of cultivation and utilization. People in many countries have the habit of drinking tea and choosing green tea, oolong tea, or black tea according to different regions and personal tastes. Tea polyphenols are a general term for polyphenol compounds in tea, and has been shown to have good effects on antioxidant, anti-inflammatory, cancer prevention and regulation of lipid metabolism. Tea polyphenols have been widely used as antioxidants in disease treatment and animal husbandry, but their specific mechanism of action needs to be further clarified and revealed. This review focuses on the definition, classification, antioxidant activity and the regulation of signaling pathways of tea polyphenols. This paper also aims to examine the application of tea polyphenols in human and animal health, providing a scientific basis for this application in addition to proposing future directions for the development of this resource.     

六堡茶多糖的提取工艺优化及组成的研究

荼多糖是黑茶功能活性物质之一.研究采用响应面法优化六堡茶多糖的提取工艺,并对优化后的多糖进行纯化与组分测定.结果 表明,六堡茶多糖的最佳提取工艺参数为浸提时间120 min、液料比15 mL/g、提取温度70℃,得率为10.81％.六堡茶多糖的组分为33.61％的总糖和35.09％的糖醛酸以及16.37％的蛋白质和2....     

茶多酚抑菌作用的研究

以食品行业常见细菌和真菌为研究对象,采用平板稀释法和滤纸片法测定了茶多酚对一些细菌和真菌的抑菌活性。结果表明:茶多酚对供试细菌有较强的抑菌活性,对大肠杆菌、金黄色葡萄球菌、枯草芽孢杆菌、奇异变形杆菌、肺炎链球菌的最低抑菌浓度(MIC100)均为0.9μg/mL,而对铜绿假单胞杆菌的最低抑菌浓度(MIC100)为1.3μg/mL;而茶多酚对供试的黄曲霉、点青霉和黑根霉均无明显的抑菌作用。     

茶及其副产品在畜禽养殖中的应用

我国茶资源丰富,且其富含多种独特的营养成分,可以调节畜禽机体的生理功能,在畜禽养殖应用中无残留、无毒副作用,能从根本上满足人们对畜禽产品品质安全的需求,从而改善和提高人们的生活水平。为此,文章就茶及其副产物的生物学特征和营养水平进行介绍,并综述其作为饲料资源对畜禽自身的生长发育、畜产品品质的影响,以及在畜禽养殖上的保健作用,旨在为茶及其副产物作为新型饲料资源的开发应用提供参考。     

不同加工工艺制成桑叶茶的感观品质及营养活性成分分析

通过不同茶叶(绿茶、红茶、乌龙茶)加工工艺试制桑叶茶,用常规的感观评审方法评价其品质,并用生化分析方法测定其营养及生物活性成分,为不同风味的高品质桑叶茶加工工艺的选择提供参考。感观品质评审3种加工工艺制成的桑叶茶具有各自独特的风格:绿茶工艺制成的桑叶茶甘醇香甜,略带桑叶青涩味;乌龙茶工艺制成的桑叶茶爽口醇和,有淡淡的花香;红茶工艺制成的桑叶茶甘甜醇厚,有近似香蕉的果香味。营养及生物活性成分检测结果:3种加工工艺制成桑叶茶的水浸出物、可溶性糖、氨基酸、黄酮类物质含量明显比桑叶固定样中的含量有所上升,而多酚类物质则比桑叶固定样明显减少,其中可溶性糖含量为红茶工艺制成桑叶茶>绿茶工艺制成桑叶茶>乌龙茶工艺制成桑叶茶,且都明显高于桑叶固定样;3种加工工艺制成桑叶茶的蛋白质含量、氨基酸总量以及17种氨基酸组分的含量均高于桑叶固定样,并以绿茶工艺制成的桑叶茶中含量最高;桑叶茶含有的17种氨基酸中,谷氨酸和亮氨酸的含量最高,且乌龙茶工艺制成的桑叶茶的苯丙氨酸、组氨酸和精氨酸等组分含量较高。     

沟渠水生植物资源化利用研究

收割沟渠中的水生植物不仅每年带走大量的氮磷污染物,还可将其养分覆盖还田,循环利用,其覆盖茶园后,得出的结论如下:1)覆盖后,改良了土壤理化性状。覆盖与对照茶园相比明显增加了土壤表层(0～20 cm)有机质、全氮、全磷、碱解氮、有效磷的含量,也增加了土壤微生物量氮、磷含量,且其土壤各养分含量均随深度的增加而递减;2)覆盖后,控制了杂草优势种群,减少了杂草种类,也降低了杂草的株高、密度和生物量;3)覆盖后,通过改善茶园的生态条件,提高了茶叶品质和产量。