Indexing

Abstract:Metals are categorized in three main ways according to their impact on human health- nutritionally essential, nonessential with a possible beneficial effect, or nonessential with toxic effects. For both nutritionally essential and toxic metals, the amount of exposure from the environment most often, through ingestion, can determine either the level of benefit or toxicity derived from such exposure. Nutritionally essential metals may cause adverse health effects at some levels below or beyond the level required for optimum nutrition. Similarly, the degree of toxicity from nonessential metals depends on the level of exposure among other factors. Heavy metal toxicity, just like chemical toxicity, has become one of the most pressing health hazards of modern times. In this article, we review the main toxicity of heavy metals and their compounds on human health.
Keywords:Bioavailability, Carcinogenicity, Exposure, Heavy metals, Human health, Metal toxicity.

Abstract:Cotton is a natural fiber and it is a cellulosic fiber. Reactive dye is most commonly used for cotton dyeing. It is used to dye wide range of shades like light shades to dark shades of cotton fabric. The aim of our work is to observe the effect of dyed sample when we change the concentration of soda in the solution. Here we conceder three different concentration of Sodium Hydroxide 20 gm./l, 15 gm./l &10 gm./l. One thing we carefully considered that the entire three samples are similarly processed and the fastness properties like color fastness to wash; color fastness to rubbing is strictly controlled. Then we observed the depth of the shed with the help of data color software (CCMS).
Keywords:Cellulosic fiber, Reactive dyes, Hydrophobic, Concentration of sodium hydroxide, colour fastness to rubbing and washing.