美国研究人员5日在美国《胃肠病学》杂志上发表研究报告称,大量摄入叶酸可以降低患结肠癌的风险。美国癌症学会的研究人员在1999年至2007年对近10万人展开了研究,其中一部分人有大量摄入叶酸的习惯。在这期间,1023人被诊断出患结肠癌。结果显示,在两年内人们摄入多少叶酸对罹患结肠癌的影响差别不大,但坚持大量摄入叶酸两年以上者,患结肠癌的风险明显降低。研究报告的主要作者、美国癌症学会的维多利亚史 ...
此次研究中,课题组创新性采用棉花花粉进行瞬时表达研究,缩短了实验周期,更快速获得转化植株,为基因功能的研究开辟了新思路。
Reagents(a) Metaphase arresting agents: Choose one of the following (Note 2) and shake vigorously to aerate before putting in living plant material; except for ice water the solution should be ...
Use from 0.01 - 0.1 gram plant material.Grind the plant material with liq.N2 in a mortar.We normally use some alumina to crush hard tissue.Transfer the ground tissue to a eppendorf tube.Add 1 ml extra ...
Generation of a Light Curve To address the hypothesis concerning photosynthetic efficiency it is necessary to expose sun and shade leaves to a range of light intensities long enough for them to fix s ...