abstract: tea is one of the most popular beverages in the world and contains several important essential micro nutrients, that are beneficial to human health. the contamination of tea leaves by heavy metals may pose serious problems to human health, because they are not biodegradable and remain in the environment and might enter the food chain. in this study, the concentration of heavy metals; ...

abortion is the termination of a pregnancy by the removal or expulsion of a fetus or embryo from the uterus, resulting in or caused by its death. missed abortion is the most common dangerous condition in pregnancy. an abortion can occur due to maternal complications, chronic disease, endocrine disorders, abortificient drugs, radiation, heavy metals and toxins. the study population consisted of ...

Metal toxicity represents a significant public health concern and contributes to many toxic metal-exposure related diseases. In particular, toxic metals promote the oxidative stress in stem cells and endothelial progenitor cells (EPCs). EPCs that are presented in peripheral blood function to replenish aging damaged endothelial cells and play important role in the maintenance of vasculature and ...

Bioinorganic chemistry is critical to cellular function. Homeostasis of manganese (Mn), for example, is essential for life. A lack of methods for direct in situ visualization of Mn and other biological metals within intact multicellular eukaryotes limits our understanding of management of these metals. We provide the first quantitative subcellular visualization of endogenous Mn concentrations (...

2. Roles of metallothionein in the cells The first discovered and still not fully understood roles of MT-1 and MT-2 are transporting of essential heavy metals, detoxification of toxic ones and protection against oxidation stress. MT by interaction with other proteins fulfils its function, resulting in different effects in the organism [5]. Interaction of MT with other proteins occurs either dir...

Metal ions are essential for growth, but in excess, these compounds can become highly toxic. Both plants and animals have adapted numerous ways to maintain metal homeostasis while mitigating detrimental effects of excess metals ions, including the metalchelating proteins metallothionein (MT) and phytochelatin. Although phytochelatins have been shown to play an important role in the detoxificati...

Various metals, in trace amounts, are essential for proper biological functioning. However, there are many heavy metals that are toxic and exposure to their high intake may result in serious adverse effects on health. Cadmium (Cd) is one of the most toxic pollutants in environment. Accumulation of Cd in blood affects the kidney and liver. The toxicity of cadmium is much affected by deficiency o...

Following the introduction of atomic absorption spectrometric (AAS) instrumentation about 30 years ago, many specific and sensitive methods for determining trace metal concentrations in biological materials were developed. Yesterday's rare and esoteric investigations are today's routine clinical analyses. Levels of essential and toxic metals can be determined with relative ease for diagnostic p...

Due to their immutable nature, metals are a group of pollutants of much concern. As a result of human activities such as mining and smelting of metalliferous ores, electroplating, gas exhaust, energy and fuel production, fertilizer and pesticide application, etc., metal pollution has become one of the most serious environmental problems today. Phytoremediation, an emerging cost-effective, non-i...

Background and Objectives: Heavy metals such as cadmium and lead are the most important toxins spreading through various ways like water, soil, and air in nature and easily enter human food chain. It is essential to determine the cumulative and harmful effects of these metals in nutrients, especially in cow milk because it is a unique source of food for all ages and it contains both essential a...