منابع مشابه
Reviving hemp.
A method is described enabling the direct measurement of vincristine resistance in intact tissues in vivo by morphological study. Using the metaphase arresting properties of the drug, counts were made of escaping anaphase and telophase mitotic figures at a range of doses. The proportion of post-metaphase mitotic figures is called the post-metaphase index (PMI). In 95 primary intestinal tumours ...
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First, there was the book. Then there was the 1962 film followed by yet another filmic version in 1997 of Nabokov's (1958) infamous best seller Lolita. Simultaneously repulsive and fascinating mediated por trayals of young girls as inviting and willing participants in their own sexual exploitation have fueled many a male fantasy. Sexualized images of girls are not only found between the covers...
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Halton Arp has recently (1989) presented empirical criticisms of the validity of tired-light mechanisms as an explanation of anomalous redshifts. This is extremely welcome and represents the beginning of a true discussion among those who are not content with standard big bang cosmology. The unorthodox theories are legion: there almost as many theories as there are unorthodox thinkers in this do...
متن کاملReviving the Exosome
In the nucleus of eukaryotic cells, RNA decay in the 3'-5' direction is carried out by a complex of exonucleases called the exosome. Surprisingly, the purified exosome shows only weak activity in vitro. Two papers in this issue of Cell, by LaCava et al. (2005) and Wyers et al. (2005), and a third report by Vanacova et al. (2005) help to solve this riddle by characterizing a new RNA decay-activa...
متن کاملReviving Partial Order Planning
This paper challenges the prevailing pessimism about the scale-up ability of partial order planners (POP) by presenting several novel heuristic control techniques that make the PO planners competitive with the state of the art plan synthesis algorithms. Our critical insight is that the techniques responsible for the efficiency of the currently successful planners–viz., distance based heuristics...
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ژورنال
عنوان ژورنال: Environment and Planning B: Planning and Design
سال: 1994
ISSN: 0265-8135,1472-3417
DOI: 10.1068/b210139