Silica ferric hydrogensulfate is an efficient heterogeneous catalyst for the cyclization of 2- aminochalcones to the corresponding 2,3-dihydroquinolin- 4(1H)-ones. This intramolecular aza Michael reaction was carried out in high yields using chalcones bearing of electron donating and electron withdrawing groups. The catalyst is reusable without significant decreases in its activity after four t...

Michael D. West is a biomedical entrepreneur and investigator whose aim has been to extend human longevity with biomedical interventions. His focus has ranged from the development of telomerase-based therapeutics to the application of human embryonic stem cells [5] in regenerative medicine [6]. Throughout his eventful career, West has pursued novel and sometimes provocative ideas in a fervent, ...

A. Introduction Acute gastrointestinal illnesses rank second only to acute respiratory illnesses as the most common disease worldwide. In children less than 5 years old, attack rates range from 2-3 illnesses per child per year in developed countries to 10-18 illnesses per child per year in developing countries. In Asia, Africa, and Latin America, acute diarrheal illnesses are a leading cause of...

Michael Maschler started visiting Spain on a regular basis late in his career. He was already a famous game theorist. As a teacher, he was certainly proud of the mark he had left on generations of students. And he was well aware of his accomplishments as a researcher, but had no trace of arrogance. His favorite activity was to listen to graduate students and learning from them while providing a...