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spec: Using his colleague Stan Stein 's method to measure proteins , Pestka invented a system called reverse phase high-performance liquid chromatography ( RP-HPLC ) for protein purification , to isolate and purify interferon proteins . The core and methods of Connection Diversity are generic but require a Link Adaptation Layer ( LAL ) for each wireless technology we want to manage [ 11 ] . Recent studies have shown that using the pill ( with estrogen and progestin ) for a year or more helps protect against uterine cancer . Hybrid Electric Vehicles offer another option for car buyers . Board Member Cynthia Verdugo-Peralta had a concern with the use of the majority of the AQAF funds for one industry . The University of Twente issues a Diploma Supplement ( DS ) for its degree programmes . Mahbub , of course , was an extremely close friend : we were students together , we maintained close contact until his untimely death , and I always enjoyed talking and arguing with him , which we did throughout our friendship . In addition to Board recognitions today for outstanding student achievements exemplified by our cross-country championships , our former students are being recognized in a variety of ways . Using FPGAs as a system platform has some compelling benefits , not the least of which is rapid chip development cycles .