The effect of demineralization on Indian bituminous coal by filamentous fungus Aspergillus niger has been investigated. X-ray diffraction profile reveals the presence of inorganic components in the sample. Biosolubilised products were characterized by FT-IR, SEM-EDS and XRD. The study reveals that coal consist of a semi-crystalline turbostratic structure. The broad diffraction peak at 20~25.5 a...

Occupational exposure to strong inorganic acid mists containing sulfuric acid has been recognized as a carcinogen (Group 1) since 1992. An augmented, secondary data analysis of a population-based case-control study of lung cancer was conducted to assess lung cancer-specific risks using 772 lung cancer cases diagnosed between 1981 and 1985. Individually matched controls--on age, gender, and boro...

The fractional determination of triethyl lead, diethyl lead, inorganic lead and total lead in the urines of a patient with tetraethyl lead poisoning was performed by means of hydride generation-flameless atomic absorption spectrometry. The chemical species of lead in the urine 21 days after the exposure comprised about 50% diethyl lead, about 48% inorganic lead and about 2% triethyl lead. The f...

Four experiments were conducted to investigate the effect of organic or inorganic acid supplementation on the growth performance, nutrient digestibility, intestinal measurements and white blood cell counts of weanling pigs. In growth trial (Exp I), a total of 100 crossbred pigs ({Landrace×Yorkshire}×Duroc), weaned at 23±2 days of age and 7.25±0.10 kg average initial body weight (BW), were allot...

Chelating is the chemical process by which a mineral (iron, cobalt, copper, zinc, and manganese) is combined with a mixture of amino acids and peptides. The resulting substances are known as chelates. Another descriptive term, proteinates, refers to the amino acid bond. These chelated minerals are thought to be more digestible than nonchelated forms. In other words, chelation makes the minerals...

The extensive use of 3-nitro-4-hydroxybenzene arsonic acid (roxarsone) in the production of broiler chickens can lead to increased soil arsenic concentration and arsenic contaminated dust. While roxarsone is the dominant arsenic species in fresh litter, inorganic As (V) predominates in composted litter. Microbial activity has been implicated as the cause, but neither the specific processes nor ...