By optimizing the raw material ratio for preparation of ethylenediaminetetraacetic acid-type chitosan (EDTA-type chitosan), extraction efficiency rare earth elements was improved. The synthesis with a lower concentration to acetic acid than that in previously reported method confirmed by IR spectra peak assigned as carboxyl group EDTA drastically decreased and amide bond reaction between more f...

An infectivity assay for MS2 ribonucleic acid (RNA), which uses bacterial spheroplasts of an F(-) strain of Escherichia coli, has an efficiency of 10(-5) infected spheroplasts per RNA molecule. The characteristics of this assay and the influence of several parameters are presented. Important variables include the duration of exposure of the cells to lysozyme-ethylenediaminetetraacetic acid, the...

°C degrees Celsius 95% CI 95% confidence interval µg microgram ACTH adenocorticotropic hormone ALP alkaline phosphatase ALT alanine aminotransferase AST aspartate aminotransferase CETP cholesteryl ester transfer protein dL deciliter EDTA ethylenediaminetetraacetic acid GGT gamma-glutamyl transferase HDL high density lipoprotein IDL intermediate density lipoprotein L liter LCAT lecithin-choleste...

An electrochemical aptasensor for detection of trace amounts of aflatoxin M1 was developed. This required immobilization of aptamer on screen printed gold electrode comprising of working electrode, counter electrode and reference electrode and was achieved by sequentially layering dithiodipropionic acid, streptavidin and biotinylated-tetraethylene glycol-aptamer. Immobilization of aptamer was m...