The toxicity of tetra and trimethyl and propyl lead compounds has been studied after their administration to rats and rabbits. The toxicity to rats of tetramethyl lead has been compared with tetraethyl lead when given by inhalation. Both tetramethyl and tetrapropyl lead were found to be considerably less toxic than trimethyl and tripropyl lead. There was evidence of a slow rate of conversion of...

Abstract This paper provides a guideline for optimizing and utilizing Mn 2+ Phos‐tag gel technology to separate phosphorylated proteins from their unphosphorylated counterparts. It key insights into methods careful sample preparation experimental directions determining the appropriate compositions electrophoresis western blotting conditions. protocol has been used successfully resolve extracted...

• Alkyl orthoformates and acetals promote esterification of levulinic acid. Reaction proceeds through formation a pseudo lactone intermediate. Inexpensive commercial catalysts are highly effective in levulinate ester formation. Highly acidic selectively produce products. Moderately nanoporous silicates the lactone. The acid under conditions to esters is current significant interest due potentia...

W ith the healthcare ministry moving toward managed care, hospitals are becoming increasingly involved in alternative arrangements with other hospitals, physicians, insurers, and employers looking for cost-efficient healthcare services. There are many alternative arrangements, integrated delivery networks ( IDNs) , integrated provider o rgan iza t ions ( I P O s ) , in tegra ted provider arrang...