Neste trabalho, é descrito um método para determinação dos agrotóxicos 2,4-D, diurom e fipronil em mel de cana-de-açúcar. O método QuEChERS foi empregado para extração e a quantificação foi realizada por cromatografia ...

This work established a procedure for commercial fungal amylase usage as indicator of enzyme inhibitors presence in cereals, intending to screening antifungal resistance properties in cereals. Firstly, the inhibitive effects ...

Nos últimos anos, as técnicas clássicas de preparo de amostra para a determinação de compostos orgânicos em amostras ambientais e alimentos estão sendo substituídas por técnicas miniaturizadas que são caracterizadas pelo ...

Atualmente as nações industrializadas se deparam com um novo problema, a contaminação das águas por contaminantes emergentes, entre eles fármacos e produtos de cuidado pessoal (PPCPs). Neste trabalho, um método analítico ...

Este estudo comparou quatro procedimentos de extração para a determinação simultânea das micotoxinas citrinina e ocratoxina A em amostras de arroz. Os procedimentos de Soares e Rodriguez-Amaya, Tanaka e os métodos de ...

Carp viscera oil can be obtained by both ensilage and fishmeal processes. This study examined the refinement of carp (Cyprinus carpio) oils obtained by both processes, and compared crude, neutralised, bleached, winterised ...

Environmental changes that have occurred due to the use of fossil fuels have driven the search for alternative sources that have a lower environmental impact. First-generation biofuels were derived from crops such as sugar ...

Natural convection in trapezoidal cavities, especially those with two internal baffles in conjunction with an insulated floor, inclined top surface, and isothermal left-heated and isothermal right-cooled vertical walls, ...

This study was undertaken to investigate the dehydration characteristics of the cyanobacterium Aphanothece microscopica Nägeli in a convective hot-air dryer. The dehydration characteristics of the biomass were examined at ...

A anchoita (Engraulis anchoita) foi capturada em cruzeiros realizados pelo Navio Oceanográfi co Atlântico Sul da Universidade Federal do Rio Grande (FURG), próximo a divisa Brasil-Uruguai. Após a captura, a matériaprima ...

O objetivo deste estudo foi avaliar os efeitos da aplicação de diferentes gomas (tara, xantana e alginato de sódio) associado com ácido cítrico, ascórbico e cloreto de cálcio, em relação as características químicas, físicas ...

C-phycocyanin is a natural blue dye that has been used as an additive in food and can be used to produce medications. The major goal of the present study was to obtain C-phycocyanin under the best operational conditions ...

Esterification is one of the most fundamental reactions in organic chemistry. It has a great application in both laboratory work and industrial processes on account of its versatility. In this study sulfamic acid (H2NSO3H, ...

Novel and effective biosensors based on Ag or Au nanoparticles dispersed in ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate (BMI$PF6) and laccase (Lac) from Aspergillus oryzae immobilized in chitosan (Chi) ...

Halloysite clay nanotubes were used as a support for the immobilization of the enzyme peroxidase from clover sprouts (Trifolium), and employed together with platinum nanoparticles in 1-butyl-3-methylimidazolium hexafluorophosphate ...

The cyanobacterium Spirulina platensis is extensively used in human nutrition because it is a source of beneficial phenolics, proteins, unsaturated lipids and vitamins. Repeated batch cultivation of photosynthetic ...

We evaluated the kinetic culture characteristics of the microalgae Cyanobium sp. grown in vertical tubular photobioreactor in semicontinuous mode. Cultivation was carried out in vertical tubular photobioreactor for 2 L, ...

Spirulina platensis microalgae (SP) and commercial activated carbon (AC) were compared as adsorbents to remove Reactive Red 120 (RR-120) textile dye from aqueous effluents. The batch adsorption system was evaluated in ...

The aim of this research was to evaluate the kinetics of the removal of nitrogen and organic matter from parboiled rice effluent by the cyanobacteria Aphanothece microscopica Nägeli. From the results obtained, it was ...

Esse artigo busca revisar a formação dos galacto-oligossacarídeos (GOS) a partir da transgalactosilação através da ação de β-galactosidase sobre a lactose, apontando a importância dos oligossacarídeos assim obtidos ...