El mass spectra of products of the dihydropyridine Hantzsch synthesis using hydroxy and methoxy aldehydes as starting materials are reported. The reaction products (C-4 hydroxy- and methoxyphenyl-1,4-dihydropyridines and ...

This method was developed and validated according to standards of ANVISA for qualitative and quantitative determination of Hydramethylnone content in technical product and formulated from this.

Direct immersion SPME-GC-MS-MS was used for the analysis of steroids in water at part-per-trillion(ppt) and lower concentrations. The method was validated and extended to real sample analysis. The method were linear from ...

It is known that heavy use of pesticides, especially herbicides and insecticides, associated with the improper management of irrigation water can result in pesticide runoff out the crops to the waters streams, rivers ...

The milk powder is a food of complex composition (protein, fat, carbohydrate, vitamins, etc.). It plays a fundamental role in child nutrition due to nutritional factors related to cognitive ability. In recent years, ...

The use of pesticides always has been associated with the effective control of pests or invasive weeds to ensure an increase in the food production. However, the indiscriminate use of these substances has caused the ...