Solvent extraction of lanthanoid elements by high molecular weight .BETA.-diketones.

Solvent Extraction Studies of Rhodium(iii) Using High Molecular Weight Amine

Extraction of high molecular weight DNA from microbial mats.

Due to the presence of inhibitors such as extracellular polymeric substances (EPSs) and salts, most microbial mat studies have relied on harsh methods of direct DNA extraction that result in DNA fragments too small for large-insert vector cloning. High molecular weight (HMW) DNA is crucial in functional metagenomic studies, because large fragments present greater access to genes of interest. He...

Synthesis of high molecular weight polyethylene using FI catalyst

A FI Zr-based catalyst of bis[N-(3,5-dicumylsalicylidene)-2′,6′­diisopropylanilinato]zirconium(IV) dichloride was prepared and used for polymerization of ethylene. The effects of reaction conditions on the polymerization were examined in detail. The increase in ethylene pressure and rise in polymerization temperature up to 35 oC were favorable for catalyst/MAO to raise the catalytic activity as...

Preparation of Ultra High Molecular Weight Polyethylene Using Ziegler-Natta Catalyst System: Optimization of Parameters by Response Surface Methodology

Static Properties of a Star Polymer in a High Molecular Weight Solvent

Recently, Rapha6l, Pincus and Fredrickson considered the static properties of an isolated star polymer f arms, N monomers per arm) dissolved in a melt of linear chains of degree of polymerization P < N, which are chemically identical to the star arms (Macromolec~les 26 (1993) 1996). In the present article we show that the results obtained by these authors are valid only for stars with a high en...