Browse

Medicinal plants offer diverse health benefits through biological active compounds, anti microbial effects that help treat diseases. Polluants contaminate medicinal plants through polluted soil, water, and air, or poor processing, with different concentrations.Different contributors include industrial emissions, pesticides, irrigation with polluted water, and environmental pollution e.g. Toxic/heavy metals such as cadmium (Cd), copper (Cu), lead (Pb), nickel (Ni), zinc (Zn), arsenic (As), and chromium (Cr), mangan...

Analyzing fire debris is essential for identifying accelerants that may indicate arson. Detecting fire residues remains a significant analytical challenge due to the complexity of burned materials, the volatilization of key compounds, and the interference of pyrolysis byproducts. However, chromatographic separation techniques and mass spectral selectivity advancements provide promising avenues for improving detection accuracy and reliability. Recent developments in portable Gas chromatography-mass spectrometry (GC...

The aim of this work is to determine the concentration of heavy metals in a series of toys used by children and compare them with the regulations in force. The presence of heavy metals in plastic toys is a significant concern to potential health risk to children. Various studies have identified a range of heavy metals in toys including lead, cadmium, mercury, chromium, zinc and other metals which can pose serious health hazards if ingested or absorbed through the skin. Many additives and catalysts used in plastics...

Accidental explosions and fires caused by combustible dust are some of the most significant threats in many industries where layers of combustible dust and clouds are formed as a result of technological processes. Combustible powders react with air oxygen in a process known as oxidation, which produces carbon dioxide, carbon oxide, water, and other gases whose contents depend on the temperature at which the oxidation occurs. The dust cloud is the main form of existence of combustible dust in the production area an...

The explosive atmosphere may be caused by flammable gases, vapors, or combustible dust. In the event that the material is combined with air in an adequate proportion, an ignition source is required to produce an explosion. Fuels and other liquids, as well as solvents from industrial items, release volatile vapors that can catch fire or explode when they come into contact with the air. At normal temperatures, flammable liquids can emit enough vapor to form combustible mixtures with air, heat, and often thick, black...

Spontaneous combustion is a phenomenon that results from the heating of combustible organic powders by slow oxidation and which occurs through the air passage (created by an air depression) through the mass of dust. The oxidation phenomenon of combustible powders represents their reaction with atmospheric oxygen resulting in products of carbon dioxide, carbon oxide, water and other gases whose content depends on the temperature at which the oxidation takes place. During oxidation, the oxidation rate is a function ...