Chemidex has opened an office in Germany to extend its commitment to the European coatings industry.      Leading the European organization will be Henning Schwinum, who was hired as managing director. Mr. Schwinum, a native of Germany, was previously employed by Bayer AG, Germany and Bayer Corporation, USA. During his 15-year employment with Bayer, Mr. Schwinum held various positions in sales, marketing, supply chain and e-business and was most recently responsible for all global activities r...