a 315 Newins Ziegler Hall, School of Forest Resources and Conservation, University of Florida, Gainesville, 32611, PO BOX 110410, USA b 358 Newins Ziegler Hall, School of Forest Resources and Conservation, University of Florida, Gainesville, 32611, USA c 357 Newins Ziegler Hall, School of Forest Resources and Conservation, University of Florida, Gainesville, 32611, USA d 353 Newins Ziegler Hall...

A novel imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalyst for ethylene and ethylene/1-hexene polymerization is investigated. The catalyst is prepared by modification of (SiO2/MgO/MgCl2)TiClx Ziegler-Natta catalysts via supporting vanadium species followed by reaction with p-tolyl isocyanate as imido agents, to get the merits from both the SiO2-supported imido vanadium catalyst and the ...

Three-dimensional anatomical models have long been essential to the learning of science and lend a sense of ?control? to those practicing in the field. As the development of embryology [4] grew in importance during the late 1800s, so did the need for models to show intricate details of embryos. Embryologists such as Wilhelm His [5], Ernst Haeckel [6], and Oscar Hertwig all initially constructed...

Heterogeneous Ziegler-Natta and homogeneous metallocene catalysts exhibit greatly different active sitenature in olefin polymerization. In our previous study, it was reported that MgCl2-supported titanocenecatalysts can generate both Ziegler-Natta-type and metallocene-type active sites according to the type of activators.The dual active site nature of the supported titanocene catalysts was furt...

Lorenz Fries, Chronik der Bischöfe von Würzburg 742-1495. Bd. I: Von den Anfängen bis Rugger 1125, hrsg. v. U. Wagner u. W. Ziegler, bearb. Th. Heiler, A. Tittmann Ziegler (Fontes Herbipolenses. Editionen und Studien aus dem Stadtarchiv Würzburg, 1), 1992. 315 S.