The biphenyl-bridged. chiral zirconocene complex rac-2.2' -biphenyl-bis( 3.4-dimethylcyclopentadienyl I zirconium dichloride catalyzes the reaction of 1.6and 1,7 -dienes with excess dibutyl magnesium to bis( butyl-magnesio-methyl '-substituted cycloalkanederivatives. Analogous reactions occur with butyl magnesium chloride and with heteroatom-t.:Ontaining dienes. The preference of 1.6-dienes for...

Yugoslav-Italian relations between two world wars, besides the diplomatic-political, also had a very significant economic aspect. Italy was one of most important foreign trade partners Kingdom Yugoslavia, and this paper will explore exchange countries, especially import materials necessary for textile industry, which substantially contributed to positive balance trade. Beside quantitative analy...

Information about injection drug users' lifestyles is necessary to develop effective harm reduction strategies. One way to gather this information is through needle exchange programs. In 1998, a convenience sample of 100 clients of Saskatoon's needle exchange service was interviewed about their injection and sexual practices. Ritalin and morphine were the most commonly injected drugs. Over half...

Gravity model explanations of trade volumes frequently include dummy variables to account for the commonality of language among trading partners. In this paper we use a data set for the number of people in a country who speak English as a first language or English as a second language (Crystal, 1997) as an indicator of the ease with which trade with the United States occurs. Controlling for com...