An evaluation was made of the quality of samples of water and sediment collected from a series of reservoirs in the Tietê River (SP), based on limnological and ecotoxicological analyses. The samples were collected during two periods (Feb and Jul 2000) from 15 sampling stations. Acute toxicity bioassays were performed using the test organism Daphnia similis, while chronic bioassays were carried ...

This study comprehensively investigated the influences of salinity, exposure concentration and time on the aggregate size, surface charge and dissolution of zinc oxide nanoparticles (ZnO-NPs; 20nm) in seawater, and examined the interacting effect of salinity and waterborne exposure of ZnO-NPs on the marine diatom Thalassiosira pseudonana for 96h. We found that aggregate sizes of ZnO-NPs signifi...

This paper deals with the treatment of hazardous zinc-bearing waste using hydraulic binders and silicone polymers, aim to allow its safe disposal into landfill. The was solidified in first step then encapsulated polymers. Samples were characterised x-ray fluorescence, diffraction, scanning electron microscopy. effectiveness process evaluated by leaching tests distilled water an acidic environme...

Knowledge of the uptake mechanisms and metabolism of metals is essential for understanding the factors governing metal toxicity, discerning means by which acclimation and homeostasis may be achieved and characterising interactions between the metal of interest and other environmental moieties. Zinc is both an important aquatic contaminant and a vital micronutrient. The physiological characteris...

Increased production and use of nanomaterials has led to an ever growing exposure of living organisms tothese substances. Limited knowledge about possible toxicity of nanomaterials and their potential to harmliving creatures is becoming a serious concern. To address this problem, there is a need for development ofdiagnostic methods enabling effective determination of potential toxicity of nanom...

Mulberry (Morus, Moraceae) is an important economic plant that considered zinc-rich. Zinc (Zn) a micronutrient plays vital roles in various bio-processes plants and animals. In the present study, comparative transcriptome analysis associated with physiological indicators was performed to reveal potential mechanism different organs response zinc toxicity mulberry. Physiological mulberry treated ...

Zinc supplementation decreases the morbidity of lower respiratory tract infection in pediatric patients in the developing world. We sought to determine if zinc mediates a specific inhibitory effect against the major cause of pediatric lower respiratory tract disease, respiratory syncytial virus (RSV). We determined the in vitro inhibitory effect of three zinc salts (zinc acetate, lactate, and s...

High heavy metal availability induces an ion stress in which is concerned with the synthesis of auxin-indole plants clearly distinct from salt stress. Heavy metals do acetic acid and transformation of carbohydrates [7]. There not affect plant growth by a significant decrease of the are 59 kinds of zinc containing enzymes representing osmotic potential of the substrate but by their own almost al...

Although the toxicity of lead and zinc to birds is widely recognized by veterinarians and bird owners, these metals are frequently found in the environments of pet and aviary birds, and intoxications are common. Clinical signs exhibited by intoxicated birds are often nonspecific, which makes early diagnosis difficult. Fortunately, lead and zinc analyses of whole blood and serum or plasma, respe...