Catalysis marches on

RNA Processing Marches on

Western General Hospital generates different forms of the mRNA and functionally Crewe Road different proteins. This is accomplished by modulation Edinburgh EH4 2XU of the basic splicing mechanism, frequently involving changes in the relative activities of antagonistic factors. Key players are the SR protein family. These consist of Introduction one or two RNA-recognition motifs (RRMs) plus a C-...

The osteoporosis revolution marches on

In 1997, when I reported on the progress of the “osteoporosis revolution,” fi ve topics were emphasized: genetics, local factors, bone mass measurements, biochemical markers, and prevention and therapy. During the past 10 years there has been substantial progress in all of these areas, but the revolution is by no means over. This review summarizes our current concepts of epidemiology, pathogene...

Semiconductor Devices: Moore Marches On

he tremendous growth in semiconductor technology has been based on the well-behaved Si−SiO2 system. In 1965, Gordon Moore, cofounder of Intel and arguably APL’s most famous alumnus, saw the future. His prediction, now popularly known as Moore’s Law, states that the number of transistors on a chip doubles approximately every 2 years. Up until now this “law” has been followed by evolutionary prog...

Laser hair removal: progress marches on.

Marches Aléatoires sur les Groupes

Dans cet article, on va étudier les marches aléatoires sur les graphes et sur les groupes. Enfin, on trouvera une condition nécessaire et suffisante pour la récurrence des marches aléatoires sur les groupes. La condition est très similaire à celle des marches aléatoires sur Zd. La démonstration qu’on donnera est la plus courte. Cependant, on admet le théorème 4.15 de Gromov sur la relation entr...