Considerable advances in the research field of erythrocyte membrane were achieved in the recent two decades.New findings in the structure-function correlation a
In this article,we analyze solitary waves in nonlinear left-handed transmission line with nonlinear diodes (Schottkys) which is an important issue,especially fo
Following the completion of genome sequen-cing of model plants,such as rice (Oryza sativa L.) and Arabidopsis thaliana,the era of functional plant genomics has
标题是文章的“眼睛”,生动的标题引人入胜,给人以美的享受。制作好标题,有许多学问,恰当地运用古诗作标题,往往能收到画龙点睛的效果。近几年全国评选出来的好标标题,有不
We extend the hole confinement model of Edwards et al.to the problem of two kinds of complex magnetic sandwich structures.
One of the central goals of community ecology is to understand the forces that maintain species diversity within communities. The traditional niche-assembly the
Dispersal, defined as a linear spreading move-ment of individuals away from others of the population is a fundamental characteristic of organisms in nature. Dis
棉花(Gossypium spp.)是世界上最重要的天然纤维作物。集纤维、蛋白、油用于一体。棉属50个种中有4个栽培种可生产纺织用纤维,分别是亚洲棉(G. arboreum)、草棉(G. herbaceum)、陆地棉(G. hirsutum)和海岛棉(G. barbadense)。其中陆地棉(G. hirsutum)占世界棉花总产量的95%以上。我国不仅是一个产棉大国,也是用棉大国,棉花生产在国民
具有杂交不亲和的配子体因子(ga)普遍存在于玉米中,不含ga基因的花粉不可以给含ga的雌蕊授粉。Ga调控的杂交不亲和有两个特点。第一,杂交的可育性由配子体决定而不是孢子体决定,即杂交的可育性主要有花粉的基因型决定,所以称为配子体因子。第二,Ga花粉可以给Ga/Ga, Ga/ga和ga/ga雌蕊授粉,但ga花粉不可以给Ga/Ga的雌蕊授粉,即Ga具有单向杂交不亲和性。简言之,配子体基因是影响单倍体配