身体告诉你缺啥营养

现代人工作繁忙．在吃饭这件事上总是放松警惕．常因不健康饮食导致体内缺乏必需的营养素．带来各种各样的问题。好在身体会发出“警告信号”来“抗议”你的不负责任。近日,美国《赫芬顿邮报》刊文指出,及时捕捉、察觉9种身体信号．可以得知身体缺啥营养．     

旅游地传统饮食文化原真性感知对满意度与行为意向的影响——以宏村臭鳜鱼为例

在区分地方饮食与传统饮食概念的基础上,选择宏村传统饮食臭鳜鱼作为研究对象,通过对就餐环境、服务、食物3个原真性维度和满意度与行为意向2个维度,构建Amos结构方程模型,探究游客对传统饮食文化的原真性感知及其对旅游地就餐满意度和行为意向的影响。结果显示,3个维度的原真性均对满意度呈显著、直接、正向影响,对行为意向呈显著、间接、正向影响;其中,环境原真性对就餐满意度影响最大,其次为服务原真性,最后为食物原真性。研究认为,即使体验对象是与原真性关联紧密的传统饮食,大众游客仍更关注整体就餐环境和服务氛围,食物本身对满意度的影响最低。游客需求引发传统饮食文化舞台化重塑,并呈现“去传统化”与“去地方化”特征,旅游地饮食文化塑造对环境的关注大于食物,但当地居民更加关注食物本身的口味,主客关注差异和食物生产过程的游客需求导向引发当地居民对舞台化饮食的认同度降低。未来旅游地要充分考虑传统饮食的特殊性,重塑让游客与本地居民更加满意的饮食文化。     

日式饮食有利于心血管健康

如果你正在寻求降低心脏病风险的方法，也许你可以尝试典型的日本料理。一项新研究结果显示，若不考虑其他心血管疾病的风险因素，那些终生食用金枪鱼、沙丁鱼、鲑鱼及其他鱼类的日本人患动脉阻塞的几率小得多．起到保护作用的很可能是鱼类中丰富的Omega-3脂肪酸。这次科学家们的研究对象包括美国白人、日裔美国人以及日本人。     

城和人的幸与不幸

北京每年都会流行一种特色饮食，比如数年前的红焖羊肉、香辣蟹，近两年的水煮鱼、麻辣小龙虾，引领饮食时尚．形成追捧风潮．得到大家的广泛爱戴和全力跟进。今年．武汉鸭颈大行其道，成为京城人休闲时的新零食．夜生活的主旋律。     

公众视角下的地方与无地方：基于游客饮食体验感知的研究

面对全球化所带来的地方与无地方现象,现有研究更多地关注资本、权力所代表的强权阶级,忽视了普通大众弱势群体的作用。针对这一问题,文章采用质性研究方法围绕中外游客对香港地方饮食在线评论文本展开内容分析。研究发现：1）游客的体验评价显示,无论是饮食产品的推陈出新、就餐环境的多元装饰,还是餐厅服务的内容形式,香港饮食文化都表现出中西融合的全球化特征,在保留传统特质的基础上也吸纳了外部文化形成创新,甚至衍生为新的地方特色产品,两者的共存与转换不仅说明地方和无地方的互相包容与促进,还呈现出两者对于全球化的反作用,地方性从而在内外不断的互动过程中呈现出新的文化内涵。2）人的主体因素在全球化过程中扮演着重要角色,不同于强权阶级借助资本、权力等因素施加影响,以游客为代表的普通大众弱势群体通过消费选择对资本、权力产生主体凝视的力量作用,引发其对地方与无地方元素的营造,这是“全球意义的地方”得以形成的关键。     

冬季饮食保健：绿芹菜可以降血压和抗癌

冬季气候寒冷,阴盛阳衰。人体受寒冷气温的影响,机体的生理功能和食欲等均会发生变化。因此,合理地调整饮食,保证人体必需营养素的充足,提高人的耐寒能力和免疫功能     

Feeding habits and ontogenetic diet shifts of Bombay duck,Harpadon nehereus

Based on two bottom trawl surveys conducted in autumn 2000 and 2001, a total of 1106 stomach samples of Bombay duck Harpadon nehereus between 23–278 mm fork length were collected and analyzed. The results show that Bombay duck prey items consisted of 11 groups or 32 species, of which Apogon lineatus, Leptochela gracilis, Acetes chinensis, and Euphausia pacifi ca were the dominant prey species. Ontogenetic variations were found in feeding habits and feeding activity of Bombay duck. Feeding activity was highest in fi sh smaller than 50 mm, lowest in fi sh between 50 and 99 mm, and then increased with increasing size thereafter. As Bombay duck size increased, fi sh prey increased in importance, whereas euphausiids and decapods decreased in importance. Different trophic guilds were observed in feeding habits across the examined size range. Bombay duck smaller than 50 mm were zooplanktivores, mainly feeding on zooplankton and fi sh larva; those between 50 and 149 mm were generalist predators, mainly feeding on pelagic shrimps, demersal shrimps and fi shes; and those larger than 150 mm were piscivores, mainly feeding on fi shes.     

Primers to block the amplification of symbiotic apostome ciliate 18S rRNA gene in a PCR-based copepod diet study

Pelagic copepods play an important role in the marine food web. However, a full understanding of the ecological status of this zooplankton group depends on the careful study of their natural diets. In previous PCR-based copepod diet studies, we found many apostome ciliates that live symbiotically under the exoskeleton of the copepods, and their sequences were often over-represented in the 18S rRNA gene （18S rDNA） libraries. As a first step to address this issue, we designed three apostome ciliate 18S rDNA blocking primers, and tested their blocking efficiency against apostome ciliate 18S rDNA under various PCR conditions. Using a semi-quantitative PCR method, we optimized the conditions to efficiently amplify the 18S rDNA of the prey while simultaneously excluding the symbiotic apostome ciliates. This technique will facilitate PCR-based diet studies of copepods and other zooplankton in their natural environments.