Jmaqintf tomic for
نویسنده
چکیده
The atomic force microscope (AFM) was used to image supercooled plasm id DNA deposited on a mica surface in either a foydrated or desiccated state. Hydrated plasmid was precisely cut by the scanning tip at a location determined by the instrument operator. Small pieces of ON A (100-150 mm in length) were excised and deposited adjacent to the dissected plasmid, demonstrating that it is possible to remove and manipulate genomic DNA fragments, unresolvable by light microscopy, from defined chromosomal locations by AFM.
منابع مشابه
ZCARUS 17, 457--468 (1972) Mariner 9 Ultraviolet Spectrometer Experiment: Mars Airglow Spectroscopy and Variations in Lyman Alpha
Mariner 9 ull raviolet spec t rome te r observa t ions show the Mars airglow consists pr incipal ly of emissions t h a t arise f rom the in te rac t ion of solar u l t raviole t radiat ion wi th carbon dioxide, the pr incipal cons t i tuen t of the Mars a tmosphere . Two minor cons t i tuen ts , a tomic hyd rogen and a tomic oxygen, also produce airglow emissions. The airglow measu remen t s sh...
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Neglect of Diatomic Differential Overlap (NDDO) in Non-Empirical Quantum Chemical Orbital Theories
In order to extend the applicability of non-empirical q u a n t u m chemical methods expanding delocalized orbi tals of molecules and stereoregular crystals as a l inear combina t ion of a tomic basis functions, we revive a discussion mainly held in the sixties and seventies abou t the possibility of neglecting small integral values occurring in numerical calculations of elect ronic states and ...
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تاریخ انتشار 2005