Ecological notes of the alien species Godiva quadricolor (Gastropoda: Nudibranchia) occurring in Faro Lake (Italy)

The first record from Sicily of the introduced facelinid nudibranch Godiva quadricolor allowed the detection of trophic relationships with the polycerid Polycera hedgpethi, another non-native nudibranch, and with two bryozoan species, namely the naturalized Cheilostomatida Bugula neritina and the cryptogenic Ctenostomatida Amathia verticillata. The settlement of both nudibranchs was presumably promoted by a trophic shift of P. hedgpethi from the natural prey B. neritina towards the largely available and not exploited A. verticillata. This short food web, without evident links with native fauna and having G. quadricolor as the top predator, is described. A DNA barcoding approach was used to confirm the identity of this facelinid species and to explore the possible genetic divergence occurring among the samples analysed.     

科学饮食 营造健康生活

饮食是人类生存的根本,是生命的源泉。伴随着人民生活水平的提高和对餐饮业需求的增长,饮食健康成了一道靓丽的风景。饮食文化、合理膳食、科学烹调和饮食习惯引起了人们广泛关注。     

食品中胆固醇氧化物研究进展

论述了食品中胆固醇氧化物的研究进展,包括胆固醇氧化物的形成、种类及含量、加工过程中应采取的预防措施以及分析检测方法.引用参考文献29篇.     

福州地区泽蛙食物多样性的初步分析

利用剖胃检查的方法研究了福州地区泽蛙的食性．结果表明，泽蛙的食物以昆虫类为主，其辛普森多样性指数为0.884；雌蛙和雄蛙食物的多样性有显著差异；有益系数为65．75％．讨论了不同性别和不高气候因素对食物多样性的影响。     

利用生态资源优势,开发"红三角"地区有机食品

结合国内外有机农业和有机食品的发展趋势，简要分析了韶关、赣州和郴州“红三角”地区开发有机食品的自然生态资源条件和对当地社会、经济发展的重要意义，并对三地区开发有机食品提出了一些建议．     

流体浓缩试验研究

流体食品常常局部地脱水以减少水的含量．增加贮藏的稳定性．蒸发是流体浓缩景广泛应用的一种方法本文描述浓缩的一种新颖系统，该系统在减压的情况下，水蒸气从流体食品中蒸发而使其浓缩本试验是在设计的单效降膜式蒸发器上进行的．研究了流体浓缩速度，流体食品流速，流体食品浓缩及流体食品温度对蒸发速度的影响，并讨论了实验结果．     

黄土高原粮食发展趋势及策略研究

根据建国以后黄土高原地区粮食生产进程经历了振荡期 (1949～ 196 4年 )、徘徊期 (196 5～ 1983年 )、增长期(1984～ 1997年 ) 3个阶段 ,分析了粮食发展趋势 ,预测了 2 0 0 0～ 2 0 30年 7个不同年份全区和分区粮食的总产 ,并在对黄土高原粮食生产进行综合考察与定位试验的基础上 ,结合区域各地粮食生产及地貌类型、土壤侵蚀程度、生态环境、农业生产条件和国家粮食政策 ,提出了粮食可持续发展的经济对策和技术对策 .     

Insect behavior at the leaf surface and learning as aspects of host plant selection

Summary Direct observations on the feeding behavior of insect herbivores are uncommon, but important. The important aspects of host-plant selection by phytophagous insects that have been revealed by such observations are the role of chemicals in the leaf surface, and learning. There are few detailed reports of behavior at the leaf surface, but these indicate that many, if not all, insects exhibit behavior pattenrs that can be interpreted as an examination of the quality of the surface and acceptance or rejection may follow without further testing. A number of experiments show that chemicals from the leaf surface commonly contribute to the acceptability or otherwise of a plant and in most cases so far the active chemicals are of widespread occurrence, not having a specific association with the host plant. Some experiments show that the association between surface chemicals and plant palatability is learned, but in other cases there is evidence of an innate response. Habituation to deterrent chemicals has been demonstrated in the laboratory, but not in the field. Food aversion learning also occurs and may be important in dietary switching by polyphagous insects.     

绿色食品产地环境监测信息系统相关技术研究进展

介绍了绿色食品产地环境质量标准以及GIS在绿色食品产地环境质量监测中的应用研究。对GIS技术的研究进展、技术特点、系统集成方面的有关情况进行了综合评述。     

利用银耳孢子发酵液开发银耳系列保健食品

本项成果是在银耳发酵饮料小试研制基础上,研究出中度规模生产新型银耳原料——银耳孢子发酵液(即液态银耳)和银耳孢子多糖粗粉的生产工艺(包括各级培养配方及其生产条件和多糖提炼工艺等。发酵液外观呈淡黄色,体态粘稠浓厚、有淡淡的发酵清香、银耳孢子含量≥1.5×10~9/ml。以银耳孢子发酵液及银耳孢子多糖粗粉为基础,作者研制开发出银雪饮料等银耳毓保健食品,该饮料配方科学、生产工艺合理可行,营养丰富、质优价廉、是符合国际饮料发展趋势的新型发酵饮料,该产品保质期达到六个月,符合 GB2759—81饮料卫生要求。