Anomalous plugging of sintered glass filters by high molecular weight polymers

Photocatalytic Decomposition of Epichlorohydrin by TiO 2 /Ag Coated Sintered Glass Filters

The Application of Sintered (Fritted) Glass Filters to Bacteriological Work.

Glass disks, prepared by sintering finely pulverized glass in a suitable mold (Bruce and Bent, 1931; Kirk, Craig and Rosenfels, 1934; Shatenshtein, 1929) have found applications in the fields of chemistry (Prausnitz, 1924, 1929 and 1932), microchemistry (Kirk, 1933) and pharmacy (Prausnitz, 1930). As far as is known, there is no account in the literature of their employment in bacteriological w...

Analysis of high-molecular-weight fructan polymers in crude plant extracts by high-resolution LC-MS

The main water-soluble carbohydrates in temperate forage grasses are polymeric fructans. Fructans consist of fructose chains of various chain lengths attached to sucrose as a core molecule. In grasses, fructans are a complex mixture of a large number of isomeric oligomers with a degree of polymerisation ranging from 3 to >100. Accurate monitoring and unambiguous peak identification requires chr...

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...

Molecular Weight Profiles of Proanthocy Anidin Polymers

The MW profiles of proanthocyanidin polymers (condensed tannins) from 32 samples representing a wide range of plant tissues of many different species have been obtained by gel permeation chromatography of the peracetate derivatives. The tannins vary widely in MW, with Al. values for the peracetates in the range 1600-5500. The MW profiles vary greatly from those with narrow, rather smooth distri...