Chorionic villus sampling: Improved method for preparation of karyotypes after short-term incubation

A method for the isolation and trypsin-Giemsa banding of metaphases obtained after short-term incubation (48 h) of cytotrophoblast cells from chorionic villus sample is described. A new slide-making instrument, developed expressly to enhance the spreading of chromosomes from metaphases released from small tissue pieces, is responsible for the increase yield of analysable metaphases in this protocol.     

[美食]与动物福利

说到“美食与环保”，人们自然会想到健康食品、无公害食品、绿色食品、自然食品、有机食品之类的标签，脑子里浮现出“土鸡（广东称走地鸡）”、“柴鸡蛋”等鲜活的形象。没污染、低农药残留甚至不施用农药、用农家肥而不是化肥，散养而非圈养等是其获得以上标签的要件。似乎关注环保，食品自然美味。     

Ein ergokryptinreiches Wildgrasmutterkorn

The Science of Nature -