SYNTHESIS AND STUDY OF THE NEMATOCIDAL ACTIVITY OF 1,2,4-TRIAZOLO-1,2,4-TRIAZOLES

The method has been developed for the preparation of ethyl esters of triazolo-substituted thioglycolic acid, basis on which the corresponding hydrazides, thiosemicarbazides and 1,2,4-triazolo-1,2,4-triazoles were synthesized by successive transformations. By the data of $ ^{1} \mathrm{H} $ and $ ^{13} \mathrm{C} $ NMR spectroscopy and elemental analysis have been established the structures of obtained compounds. Biological studies have shown that triazolo-triazoles at concentrations of 50 and 100 $ \mu m/mL $ reduce the viability of nematodes Steinernema Feltiae by 10–40%.

Improvement of Biodegradable Biocide’s Activity of Peroxyacetic Acid Basis Using Surfactants: Characterization and Stability

This paper deals with the study of the kinetics decomposition reaction of the peroxyacetic acid under influence of surfactant additives. The peroxyacetic acid shows a decomposition rate of 1.70×10−3 h−1and its activation energy is 66 kJ mol−1. The influence of temperature on the reaction of spontaneous decomposition of peroxyacetic acid was studied at two seasonal periods. Peroxyacetic acid standard and four prototypes of biocide samples with known concentration of peroxyacetic acid and hydrogen peroxide were studied. Finally, a factorial analysis ANOVA was carried out to establish significant differences (p<0.003) between the four biocide samples over time with respect to peroxyacetic acid and hydrogen peroxide concentration. From the study carried out, it can be concluded that the biocide with surfactant substances in its composition offers the best stability and its difference versus the other biocides may guarantee a better behaviour.