منابع مشابه
Repeated TALEs
Three recent papers, published just weeks apart, describe the use of fluorescent TALEs to tag specific DNA sequences in live cells and, in one case, also in fixed cells, the latter with potential clinical applications.
متن کاملBacteriophage tales
A correspondent has asked me about the origins of a legend which has become known as 'The phage in the letter'. Common to all variants of this story is the following: one scientist, called X, sends a request to another, Z, for a particular bacteriophage strain which Z has discovered. Z replies saying he is not sending it out. X thereupon plates out the letter and retrieves the phage from it. So...
متن کاملTales and Woes of High Frequency Trading: an Introduction
One of the basic assumptions of the early mathematical theory of financial markets is the absence of friction and consequently, the fact that securities have one price (law of one price), and that they can be sold and bought at this price in any desired quantity. This form of infinite liquidity implies that the sizes and the frequencies of the transactions have no impact on the prices at which ...
متن کاملPathogenetic tales
A little over twenty years ago, a group of scientists assembled in Asilomar, California, to consider the consequences of the newly invented techniques of genetic engineering, or recombinant DNA, as it later came to be called. There was in place a moratorium recommended by scientists and which we, working for the UK's Medical Research Council, had been instructed to heed by the Secretary of the ...
متن کاملTales from the crypt
Tales from the crypt ow many stem cells reside in a human colonic crypt and how do they divide and regenerate? According to the deterministic theory, a small number of " immortal " stem cells haunt a crypt, and when they divide, each generates a single replacement stem cell. The stochastic model, in contrast, contends that a crypt niche harbors many stem cells, and each cell division randomly g...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1989
ISSN: 0028-0836,1476-4687
DOI: 10.1038/341695c0