BioScience Dictionary

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Found Wood 73 times.

Displaying results 1 to 10.

1. Activated carbon (activated charcoal)
A type of carbon produced through exposing a source material such as wood or bone to very high temperatures in the presence of steam, air, or carbon monoxide. Activated carbon is very good at removing ( adsorbing ) contaminants and is used in water filters, to decolor solutions, and is sometimes administered to poisoning victims.

2. Agroforestry
The collective word for all land-use systems and practices in which trees and shrubs are deliberately grown on the same land management unit as crops and/or animals. This can be either in some form of spatial arrangement or in a time sequence. To qualify as agroforestry, a given land-use system or practice must permit significant economic and ecological interactions between the woody and non-woody components. Within this broad definition, a wide variety of both traditional, as well as relatively new systems and practices, fall under the umbrella concept of agroforestry.

3. Alcohol
An organic chemical containing one or more hydroxyl groups (-OH). Alcohols can be liquids, semisolids or solids at room temperature. Common alcohols include ethanol ("grain alcohol," the type found in alcoholic beverages) methanol (aka "wood alcohol," can cause blindness and other nervous system damage if ingested) and propanol.

4. Alcohol
Ethyl alcohol, also known as ethanol, the spirit in wine, is classified as a sedative-hypnotic drug. The criminal code of Canada states that it is an offence while the person's ability to operate or has control of a motor vehicle or vessel is impaired by alcohol or a drug or while the person's blood levels of alcohol exceed 80 mg/dL. Impaired driving performance has been observed with serum levels of ethanol as low as 30 mg/dL. A serum level above 300 mg/dL usually produces coma. Intoxication of alcohol is associated with violence, suicide, child and spouse abuse, respiratory depression, stupor, vomiting, predisposing to Mallory-Weiss Syndrome, hypoglycemia, cardiac arrhythmia, seizures. Chronic ingestion is associated with liver cirrhosis and withdrawal symptoms (Delirium Tremens).Two groups of alcohol drinkers are indentifiable based on the pattern of drinking: the problem drinkers and the ones with severe alcohol dependence. * Methyl alcohol, also known as methanol, or wood alcohol can also produce the sensation of being "drunk". However, ingestion of large quantities of methanol can cause visual disturbances (blindness via neurological damage), and a metabolic acidosis and is a medical emergency necessitating fluid resuscitation, respiratory care, ethanol infusion to block the building up of toxic products and dialysis. * Isopropyl alcohol is rubbing alcohol; it is poisonous.

5. Arborescent
Resembling a tree (applied to non-woody plants attaining tree height and to shrubs tending to become tree-like in size). Compare dendroid .

6. Bark
The outer layer of the stems of woody plants; composed of an outer layer of dead cells ( cork ) and an inner layer of phloem .

7. Cambium
The layer of tissue between the bark and wood in woody plants, from which new wood and bark develops.

8. Cauline (cauliflorous)
Of leaves, borne on an aerial stem; of flowers or fruits, borne on old wood.

9. Cone
In gymnosperm s and club mosses, a group of sporophyll s arranged compactly on a central axis; in the angiosperm family Casuarina, a woody multiple fruit incorporating the bract s and bracteoles associated with the flowers.

10. Cork cambium
A layer of lateral meristematic tissue between the cork and the phloem in the bark of woody plants.

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