Photochemical Oxidation of Polyethylene Terephthalate Microplastics Adsorbed on Sand and Silica Surfaces.

The environmental contamination by plastics, microplastics, and related compounds is a major concern. While the detection and release of micro- and nanoparticles from these materials have been widely studied, the formation and release of molecules resulting from their degradation in the environment have been overlooked. This work presents a study of the products released from poly(ethylene terephthalate) (PET) irradiated as pure particles and adsorbed on silica and sand surfaces under different irradiation conditions.

A review of plant metabolites with metal interaction capacity: a green approach for industrial applications.

Rapid industrial development is responsible for severe problems related to environmental pollution. Many human and industrial activities require different metals and, as a result, great amounts of metals/heavy metals are discharged into the water and soil making them dangerous for both human and ecosystems and this is being aggravated by intensive demand and utilization. In addition, compounds with metal binding capacities are needed to be used for several purposes including in activities related to the removal and/or recovery of metals from effluents and soils, as metals' corrosion inhibitors, in the synthesis of metallic nanoparticles and as metal related pharmaceuticals, preferably a with minimum risks associated to the environment.

Effect of low-calorie diets on metabolism of man under hypokinesia.

It has been suggested that a low-calorie diet is more adequate than a high-calorie diet for men under hypokinesia (diminished muscular activity). Thus, the aim of this study was to evaluate the effect of a low-calorie diet on the metabolism of twelve physically healthy men aged 19 to 24 years under 90 days of hypokinesia. They were divided into control and experimental groups of men according to the composition and food value of diet: the control group of men received a food-value diet of 2648 kcal/day and the experimental group a diet with energy value of 1900 kcal/day.

Nutritional status of men under hypokinesia.

Hypokinesia (diminished muscular activity) elicits substantial changes in energy and nutritional requirements in humans. The objective of this investigation was to determine the nutritional status of six physically healthy men aged 19 to 21 years under 95 days of hypokinesia without the use of any preventive measures. For the simulation of the hypokinetic effect the men were placed under 95 days of an ad libitum bed rest regimen.

Metabolic changes in man under hypokinesia and physical exercise.

It was theorized that physical exercise may be used to prevent the development of metabolic changes in man under hypokinesia (diminished muscular activity). In this investigation we assessed the efficacy of physical exercise in attenuating metabolic disturbances in twelve physically healthy men aged 19 to 23 years under 100 days of hypokinesia and 15 days of a readaptation period. The subjects were divided into an experimental and a control group with six men each.