Photocatalytic removal of textile wastewater-originated methylene blue and malachite green dyes using spent black tea extract-coated silver nanoparticles.

The spent black tea extract was utilized in order to synthesize the spent black tea silver nanoparticles (SBT-AgNPs). Various parameters were tested to yield the best production of SBT-AgNPs. The characterization was conducted by X-Ray diffraction, Scanning electron microscopy, Zeta potential and energy dispersive X-ray (EDX).

Evaluation of the effect of aging on the shear bond strength between old composite resin restoration and the repair composite resin: an in-vitro study.

Background: The current study aimed to evaluate the effect of aging on the repair bond strength between old composite resin and repaired composite resin and to evaluate which type of repair composite material provides better bond strength in different time durations.

Methods: Eighty nano-hybrid composite specimens were randomly divided into four groups (N.=20) and exposed to accelerated aging from 0 to 2 years.

Perinatal bisphenol A exposure has an age- and dose-dependent association with thyroid allostasis adaptive response, as well as anxiogenic-depressive-like and asocial behaviors in juvenile and adult male rats.

Thyroid hormones are essential for brain development, and a shortage throughout the fetal and postnatal periods can result in mood disorders. Perinatal exposure to bisphenol A (BPA) affects thyroid activity and dependent processes indirectly during pregnancy or early postnatal life. This is particularly important because it may cause changes in tissue ontogeny, increasing the risk of developing disorders later in life.