The conjugate of folic acid (pteroylglutamic acid, vitamin B,) in yeast was isolated by Pfiffner et al. (1) and determined to be pteroylhexaglutamyl glutamate (2). Recently this group has published details of the concentration of the conjugate (3). The present paper describes a simple method for producing a concentration of the conjugate of from 40to loo-fold by differential extraction of colum...

Cyclic stress strain curves (CSSC) response of Al-2024 Annealed condition was conducted under symmetric tension-compression at room temperature and constant frequency, using a servo-hydraulic testing machine, to study the effect of cooling rate on cyclic stress strain curves (CSSC) response. The fatigue response of Al-2024 alloy was evaluated macroscopically in terms of cyclic stress strain res...

A colorimetric filtration method has been developed for the highly selective and sensitive determination of Ni(2+) and Pb(2+) ions. Determinations of Ni(2+) and Pb(2+) follow the filtration using nioxime (1,2-cyclohexanedione dioxime) and rhodizonic acid disodium salt, respectively, as colorimetric reagents. Different from regular instrumentation techniques, the metal chelate precipitations are...