Dr. Holger Schwichtenberg is the technical director of the expert network www.IT-Visions.de, which supports numerous medium-sized and large companies with consulting and training services as well as ...

An American horseback tour operator was allegedly killed by her ex-boyfriend while working on a Caribbean island, according to authorities and reports. Karen Johannsen, 66, was violently struck in the ...

An American horseback tour operator who spent her days leading guests along Antigua’s picturesque shoreline has died after a brutal assault earlier this month. Karen Johannsen, 66, of Madison, ...

Crystal structures of the Lac repressor, with and without isopropylthiogalactoside (IPTG), and the repressor bound to operator have provided a model for how the binding of the inducer reduces the ...