The presence of cholinesterase activity in M. demissus hearts was demonstrated by light- and electron-microscopic histochemistry and by enzymic assay. The enzyme proved to be acetylcholinesterase (AChE) since acetylthiocholine was the preferred substrate, and eserine or BW284C5I inhibited the enzyme activity, while isoOMPA was without effect. The AChE was localized and uniformly distributed alo...

1. The microsome fraction of rat liver has been fractionated and the ability of the fractions to incorporate ribonucleotides into polyribonucleotides has been studied. Activity was found in the rough-surfaced vesicle (light) fraction and in the free-ribosome fraction and this latter activity has been examined. 2. The free-ribosome fraction contains ribosome monomers, dimers and trimers together...

Oat mesophyll protoplasts were evacuolated by centrifugation on a Percoll gradient and used as starting material for establishing a functional cell-free system. For this purpose evacuolated protoplasts were osmotically lysed. From the resulting homogenate a cytosolic fraction was obtained by silicon oil filtration. This fraction was used to dilute preparations o f lysed evacu­ olated protoplast...

Float fraction of float/sink process of car shredder light fraction was received from RAV (The Netherlands) in the frame of the W2Plastics (http://www.w2plastics.eu/) EU7 project (magnetic sorting and ultrasound sensor technologies for production of high purity secondary polyolefins from waste). The differently coloured plastic waste particles were manually separated and after determining the m...

throughout the present study, similar horizons (a, ab and b1) from deciduous forest, coniferous forest and rangeland types of land uses were selected, and the percentage of water stable aggregates in them measured. in each class of stable aggregate at the horizon a, free light fraction, free-particulate organic matter, intra-aggregate of particle organic mather (pom), and clay + silt complexes ...

Experimental results are presented from an experiment in which ionization created by a highenergy x-ray synchrotron radiation beam intersecting an ethylene diffusion flame is measured.The ionization signal is believed to arise from x-ray absorption by aggregated soot particles.Comparisons are made between these ionization profiles and those due to natural flameionization. Visibl...