BACKGROUND Nowadays a significant amount of land contaminated with toxic elements is being used for agriculture, posing serious risk crop contamination and toxicity. Several methodologies are to remediate soil contamination, including the use amendments such as biochar. This work evaluated effects biochar combined different fertirrigations (water, conventional fertilizer solution, or solution c...

Introduction: Iron plays an important role in physiological processes as a trace element. Today, iron oxide nanoparticles have attracted extensive attention due to their super paramagnetic properties and a variety of potential applications in many fields. The main objective of this study was to evaluate in vitro and in vivo toxic effects of the iron oxide nanoparticles on L929 cell line, kidney...

The concentrations of five essential elements and six potentially toxic elements were determined in seven organs collected at autopsy from 30 human subjects. Elemental analyses were carried out by graphite furnace atomic absorption spectroscopy, and inductively coupled plasma emission spectroscopy, and inductively coupled plasma mass spectroscopy, and concentrations in fresh and formalin-fixed ...

Iron is the fourth most abundant element on Earth and is essential for almost all living organisms. However, it is not accessible to cells in every environment. Ferric iron solubility is low at physiological pH, and in aerobic environments, ferrous iron is highly toxic. Thus, iron is not free but bound to proteins [Clarke et al., 2001; Taylor and Kelly, 2010]. In complex organisms, the majority...

This ex post facto study examined the effect of secrecy on well-being in a sample of 287 HIV-positive individuals, using both self-report data and objective immune parameters. The effects on well-being of three components of secrecy were studied; self-concealment, possession of a secret, and cognitive preoccupation. Confirming our hypotheses, we found a positive effect of possession of a secret...

The potential of near infrared spectroscopy (NIR) with remote reflectance fiber-optic probes for determining the mineral composition of propolis was evaluated. This technology allows direct measurements without prior sample treatment. Ninety one samples of propolis were collected in Chile (Bio-Bio region) and Spain (Castilla-León and Galicia regions). The minerals measured were aluminum, calciu...

Selenium (Se) is an important element in environmental and agricultural studies and in human health, as it is an essential trace nutrient but is also toxic in excess. The role of certain chemical forms of Se is also the subject of signifi cant research into cancer prevention. ICP-MS is the analytical method of choice for both total and speciated Se measurements, but Se is diffi cult to quantify...

A simple and reliable multi-element procedure for determination of essential (Cr, Cu, Fe, Mg, Mn, Zn) and toxic (Al, Cd, Pb) elements in legumes by inductively coupled plasma-optical emission spectrometry (ICP-OES) was developed. In this contribution, four different digestion procedures were thoroughly investigated and accurately evaluated with respect to their affect on the analysis of legumes...

Iron is the most abundant trace mineral in the body and is an essential element in most biological systems.1,2 It is likely that iron was essential for developing aerobic life on Earth.3 But iron is toxic to cells in excessive amounts. Acute iron poisoning is common and potentially lethal in dogs, cats, and many other animals. Iron is also a leading cause of unintentional poisoning deaths in ch...

mercury is a dangerous and an extremely toxic element, which can transfer to the food chain.presence of this element in the atmosphere particularly during the rainy seasons cause soil and environmental pollution, therefore this research will evaluate the transformation of mercury vapor from the atmosphere through precipitation into the soil. in the present study, mercury concentrations were det...