منابع مشابه
An Experiment on Visible Changes of Web Pages
Since web pages are created, changed, and destroyed constantly, web databases (local collections of web pages) should be updated to maintain web pages up-to-date. In order to effectively keep web databases fresh, a number of studies on the change detection of web pages have been carried out, and various web statistics have been reported in the literature. This paper considers the issues of web ...
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A study of the physical properties of protoplasm requires for its foundation a knowledge of the consistency of protoplasmic structures in the living cell. Barber’s pipette holder, a mechanical device for manipulating microscopically fine pipettes and glass needles in a hanging drop has proved most valuable for this purpose as with it one may dissect living cells under direct microscopic observa...
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ژورنال
عنوان ژورنال: Nature Chemistry
سال: 2012
ISSN: 1755-4330,1755-4349
DOI: 10.1038/nchem.1427