Thermo Gravimetric Analysis (TGA) analysis was employed to investigate activation energy (Ea) for the process of degrading of poly(o-toluidine) (POT) applying Horwitz & Metzger, Coats & Redfern and Chan et al., methods. POT was synthesized by chemical oxidative polymerization method using Ammonium per Sulphate (APS) as an oxidant while Dodecylbenzene Sulphonic Acid (DBSA) and sul...

Various aza-analogues of 1,4-naphthoquinone and menadione were prepared and tested as inhibitors and substrates of the plasmodial thioredoxin and glutathione reductases as well as the human glutathione reductase. The replacement of one to two carbons at the phenyl ring of the 1,4-naphthoquinone core by one to two nitrogen atoms led to an increased oxidant character of the molecules in accordanc...

Jujube is a crop very resistant to drought and salinity, making it an interesting growing alternative in southeastern Spain. The characteristics of five different cultivars the jujube fruit have been evaluated classified into four maturation stages according color peel, ranging from green its most immature stage, white, yellow, red last, more mature stage. This due part amount carotenoids chlor...

A Sensitive and precise differentialpulse stripping voltammetric method at static mercury dropping electrode (SMDE) has been applied to measure zinc(II) by anodic stripping at pH∼4 and aluminum(III) by adsorptive cathodic stripping mode in presence of 1×10M N,N` -bis-2-hydroxyethyl-2-amino-ethane sulphonic acid (BES) buffer at pH~7.1 and 2×10 M of alizarin red S as a ligand in drinking water sa...

The effect of quinone herbicides and fungicides on photosynthetic reactions in isolated spinach (Spinacia oleracea) chloroplasts was investigated. 2,3-Dichloro-1,4-naphthoquinone (dichlone), 2-amino-3-chloro-1,4-naphthoquinone (06K-quinone), and 2,3,5,6-tetrachloro-1,4-benzoquinone (chloranil) inhibited ferricyanide reduction as well as ATP formation. Benzoquinone had little or no effect on the...