Tobacco (Nicotiana tobaccum) leaf dust has both piscicidal and fertilizer properties. Thus there is a need to study its effects at sub-lethal concentrations (375.60, 187.80, 93.90 0.0mg/L) on some enzymatic activities of Heteroclarias in a static semirenewable bioassay system with the aim to ascertain its effect on the test fish after the 14 days exposure period. Water quality parameters and ph...

In Sir Arthur Conan Doyle’s A Study in Scarlet, Sherlock Holmes and his companion Dr John Watson find themselves at the scene of a homicide: a man’s body has been discovered in an abandoned house, with the word RACHE (German for revenge) written in blood on a nearby wall. Holmes reads footprints in the dust, scrutinises little heaps of tobacco ash with his magnifying glass, and takes a close lo...

Sorption is currently a promising method for purifying wastewater from organic and inorganic substances. The authors have developed technology obtaining granular composite sorbent (GCS), on the basis of large-tonnage production waste - tobacco dust. However, as result sorption purification highly concentrated food industry enterprises, significant amount formed, regeneration which economically ...

Three fractions of tobacco waste (scrap, dust and midrib) were subjected to a high voltage electric discharge (HVED) assisted extraction procedure under different experimental conditions: solvent:solid ratio (300, 500, 700 mL/g), frequency (40, 70, 100 Hz) treatment time (15, 30, 45 min), in order study the influence these conditions on content chlorogenic acid. The acid ranged from 1.54 3.66 m...

BACKGROUND A nested case-control study for lung cancer was performed on a cohort of 2260 South African gold miners in whom an association between exposure to silica dust and risk of lung cancer was previously reported. The objective was to investigate an expanded set of risk factors and also cancer cell type. METHODS The 78 cases of lung cancer found during the follow up period from 1970 to 1...

BACKGROUND Millions of people worldwide are exposed to arsenic in drinking water, and many are likely coexposed to other agents that could substantially increase their risks of arsenic-related cancer. METHODS We performed a case-control study of multiple chemical exposures in 538 lung and bladder cancer cases and 640 controls in northern Chile, an area with formerly high drinking water arseni...

BACKGROUND Welders are at risk for cardiovascular disease. Recent studies linked tobacco smoke exposure to hypomethylation of the F2RL3 (coagulation factor II (thrombin) receptor-like 3) gene, a marker for cardiovascular disease prognosis and mortality. However, whether welding fumes cause hypomethylation of F2RL3 remains unknown. METHODS We investigated 101 welders (median span of working as...

Respiratory chronic airway disorders and early damage of pulmonary system predict by Spirometry. Occupational exposures to coal dust affect the different systems of the body. The present study has focused on the coal workers who are continuously exposed to air pollutants such as coal dust. Study group of 170 male workers working in coal mines for more than ten years, consists of 66 non-alcoholi...

In the present study the possibility of using nicotine in house dust as an index of environmental tobacco smoke (ETS) exposure was evaluated in an environmental investigation of 23 children with asthma. A standardized procedure for house dust sampling of nicotine with a filter holder connected to a vacuum cleaner, for a defined time and area was developed (F-nicotine). Also, house dust sampling...