A hapten-protein conjugate for determining carbaryl using copper nanoparticles was first synthesized in the present work. The were used as electrochemical labels direct solid-phase competitive analysis of residues flour from some crops. Copper stabilized by chitosan and a with UV/VIS - spectroscopy, transmission electron microscopy, dynamic light scattering are characterized. To form recognitio...

In the present work, graphene oxide (GO)–polyvinyl alcohol (PVA) composites thin film has been successfully synthesized and prepared by spin coating techniques. Then, properties morphology of samples were characterized using Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-Vis), atomic force microscopy (AFM). Experimental FTIR results for GO–PVA demonstrated existence imp...

A liquid chromatographic procedure has been developed for the determination of carbaryl, a phenyl-N-methylcarbamate, and its main metabolite 1-naphthol, using a C18 column (250 mm  ×  4.6 mm) with a micellar mobile phase and fluorescence detection at maximum excitation/emission wavelengths of 225/333 nm, respectively. In the optimization step, surfactants sodium dodecyl sulphate (SDS), Brij-35 ...

Areawide pest management involves the uniform application of a pest control strategy over wide geographic areas. Therefore, these programs are likely to impose intense selective pressures, and the risk for resistance development among pest species for which areawide management programs are implemented is likely to be high. Pilot studies for areawide management of western corn rootworm, Diabroti...

Understanding population responses to rapid environmental changes caused by anthropogenic activities, such as pesticides, is a research frontier. Genetic assimilation (GA), a process initiated by phenotypic plasticity, is one mechanism potentially influencing evolutionary responses to novel environments. While theoretical and laboratory research suggests that GA has the potential to influence e...

Urinary naphthol is an established human biomarker used for assessing both occupational and environmental exposure. However, 1-naphthol is a metabolite of the insecticide carbaryl while both the 1- and 2-isomers are metabolites of naphthalene. Thus, urinary 1-naphthol levels will reflect combined exposure to both substances, particularly at environmental levels. The interpretation of biomarkers...

Stressors are commonly encountered by organisms and often prove to be energetically costly. Certain stressors can simultaneously affect multiple components of an animal's energy budget and can either exacerbate energetic costs to the individual or offset one another. Here we used a commonly encountered stressor, the pesticide carbaryl, to examine the complex effects that acute environmental dis...

Imidacloprid, acephate, and carbaryl are common insecticides that extensively used in planting mango, a well-known fruit Vietnam, to ease mango hopper issues. The accurate detection of pesticide residues is critical for export meet quality criteria. This study developed novel SERS platform by using polydimethylsiloxane (PDMS) simulate the rose petal structure incorporated with silver coating la...

background: the german cockroach, blattella germanica (l), is a world wide hygienic pest that is very difficult to control. extensive usage of insecticides may develop resistance to a variety of insecticides, causing failure to control. this study was designed to determine resistance of hospital-collected strains of the german cockroach to carbamate and organophosphorous insecticides. methods: ...