نتایج جستجو برای: مس 61
تعداد نتایج: 71818 فیلتر نتایج به سال:
A new enantioselective a-oxidation of aldehydes has been accomplished using TEMPO and a synergistic combination of copper and organic catalysis. Expanding upon recently reported mechanistic studies, these mild catalytic conditions provide stable aldehyde products bearing a wide array of electronically and sterically diverse substructures. The utility of these oxidized products is highlighted by...
The placement of dental implants in the anterior maxilla is a challenge for clinicians because of patients’ exacting esthetic demands and difficult pre-existing anatomy. This article presents anatomic and surgical considerations for these demanding indications for implant therapy. First, potential causes of esthetic implant failures are reviewed, discussing anatomic factors such as horizontal o...
This paper describes ongoing work involving the use of the Xilinx XC6216 rapidly reconfigurable fieldprogrammable gate array to evolve sorting networks using genetic programming. We successfully evolved a network for sorting seven items that employs two fewer steps than the sorting network described in a l962 patent and that has the same number of steps as the seven-sorter devised by Floyd and ...
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