Cumulative Effects of Chronic Exposure of Plants to Low Levels of Air Pollutants

1973 ◽  
pp. 21-30 ◽  
Author(s):  
WILLIAM A. FEDER
Keyword(s):  
Air Pollutants ◽  
Chronic Exposure ◽  
Cumulative Effects ◽  
Low Levels

Chronic exposure to low levels of inorganic arsenic causes alterations in locomotor activity and in the expression of dopaminergic and antioxidant systems in the albino rat

2010 ◽  
Vol 32 (6) ◽  
pp. 640-647 ◽  
Author(s):  
Verónica Mireya Rodríguez ◽  
Jorge Humberto Limón-Pacheco ◽  
Leticia Carrizales ◽  
María Soledad Mendoza-Trejo ◽  
Magda Giordano
Keyword(s):  
Locomotor Activity ◽  
Chronic Exposure ◽  
Inorganic Arsenic ◽  
Antioxidant Systems ◽  
Albino Rat ◽  
Low Levels

Community changes in a deciduous forest exposed to air pollution

1978 ◽  
Vol 8 (4) ◽  
pp. 432-438 ◽  
Author(s):  
James R. McClenahen
Keyword(s):  
Air Pollutants ◽  
Chronic Exposure ◽  
Deciduous Forest ◽  
Diversity Index ◽  
Air Pollutant ◽  
Stem Density ◽  
Ohio River ◽  
Ohio River Valley ◽  
Relative Importance ◽  
Relative Exposure

Vegetation was measured in seven stands on similar sites in a 50-km portion of the upper Ohio River Valley. These stands lay along gradients of chronic exposure to airborne chloride (Cl−), sulfur dioxide (SO2), fluorides (F−), and possibly other pollutants. Species richness, evenness, and Shannon diversity index were generally depressed within the overstory, subcanopy, and herb strata near industrial sources of air pollutants. A significant relationship between coefficient of community and combined air pollutant index (relative exposure of stands to Cl−, F−, and SO2) showed that similarity in species composition decreased along a gradient of increasing air pollutant exposure. Increasing air pollutant exposure reduced overstory stem density, but abundance of vegetation in other strata tended to increase along the same gradient. The relative importance of Acersaccharum Marsh. was greatly reduced in all strata with increasing pollutant exposure, whereas Aesculusoctandra Marsh. appeared tolerant of air pollutant stress. In understory strata, the importance of Linderabenzoin (L.) Blume increased with increasing pollutant exposure.

scholarly journals Effects of chronic exposure to Low levels of IR on Medaka (Oryzias latipes): a proteomic and bioinformatic approach

2021 ◽  
pp. 1-46
Author(s):  
Yeni Natalia C. Perez-Gelvez ◽  
Alvin C. Camus ◽  
Robert Bridger ◽  
Lance Wells ◽  
Olin E. Rhodes ◽  
...  
Keyword(s):  
Chronic Exposure ◽  
Oryzias Latipes ◽  
Low Levels ◽  
Bioinformatic Approach

Hematological Changes in Hospital Workers due to Chronic Exposure to Low Levels of Ethylene Oxide

2000 ◽  
Vol 42 (8) ◽  
pp. 843-850 ◽  
Author(s):  
Judith Shaham ◽  
Ziva Levi ◽  
Rachel Gurvich ◽  
Ralph Shain ◽  
Joseph Ribak
Keyword(s):  
Ethylene Oxide ◽  
Chronic Exposure ◽  
Hospital Workers ◽  
Low Levels ◽  
Hematological Changes

The hazards of operational diving in heavily oil-polluted water

1991 ◽  
Vol 77 (3) ◽  
pp. 159-164
Author(s):  
K. A. Peterson ◽  
S. J. Portouw
Keyword(s):  
Thyroid Cancer ◽  
Skin Cancer ◽  
Crude Oil ◽  
Chronic Exposure ◽  
Animal Studies ◽  
Epidemiological Studies ◽  
Polluted Water ◽  
Toxic Dose ◽  
Increased Risk ◽  
Low Levels

AbstractThe war in the Gulf and the resultant massive oil spill has prompted an assessment of the health hazards to naval divers operating in oil-fouled environments. A review of current literature and discussions with experts in the field was undertaken to assess these hazards. With the assistance of Kuwait Petroleum, an assay of the content of average Kuwait crude was obtained. The risks of contact with crude oil and its vapours via the skin, inhalation and ingestion have been assessed. Contact dermatitis is the most likely sequel. A chemical pneumonitis from oil inhalation is possible but extremely unlikely. A health risk from ingestion of crude oil is equally unlikely since no toxic effect is thought to occur below a consumption of 5 ml/kg (350 ml for an average diver). Trace metals were found to be at a level of less than 1/10 of the minimal toxic dose for all but vanadium. No increased risk of skin cancer can be found in animal studies of crude oil. Epidemiological studies have recorded no increased risk of bladder or thyroid cancer in petroleum workers, but an increase in lung, nasal cavity, sinus and skin cancer has been shown following chronic exposure to low levels of petroleum vapour. No medical indication was found for modification of existing operational procedures, although, since the toxicity of some components of crude oil is unknown, the use of improved equipment to avoid contact should be studied.

scholarly journals Sub-Chronic Exposure to Methylmercury at Low Levels Decreases Butyrylcholinesterase Activity in Rats

2010 ◽  
Vol 106 (2) ◽  
pp. 95-99 ◽  
Author(s):  
Juliana Valentini ◽  
Juliana Vicentini ◽  
Denise Grotto ◽  
Raquel Tonello ◽  
Solange C. Garcia ◽  
...  
Keyword(s):  
Chronic Exposure ◽  
Low Levels ◽  
Butyrylcholinesterase Activity
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