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Wood

Wood is an organic material; in the strict sense it is produced as secondary xylem in the stems of trees (and other woody plants). In a living tree it conducts water and nutrients to the leaves and other growing tissues, and has a support function, enabling woody plants to reach large sizes or to stand up for themselves. However, wood may also refer to other plant materials with comparable properties, and to material engineered from wood, or wood chips or fiber.

People have used wood for millennia for many purposes, primarily as a fuel or as a construction material for making houses, tools, weapons, furniture, packaging, artworks, and paper. Wood can be dated by carbon dating and in some species by dendrochronology to make inferences about when a wooden object was created. The year-to-year variation in tree-ring widths and isotopic abundances gives clues to the prevailing climate at that time.

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Combined wood and tobacco smoke exposure increases risk and symptoms of COPD

People who are consistently exposed to both wood smoke and tobacco smoke are at a greater risk for developing chronic obstructive pulmonary disease (COPD) and for experiencing more frequent and severe symptoms of the disease, ...

Health created May 20, 2013 | popularity not rated yet | comments 0

High-testosterone competitors more likely to choose red

Why do so many sports players and athletes choose to wear the color red when they compete? A new study to be published in Psychological Science, a journal of the Association for Psychological Science, suggests that it may ...

Psychology & Psychiatry created May 16, 2013 | popularity 5 / 5 (2) | comments 1 | with audio podcast

Poorer neighborhoods often have less safe playgrounds

(HealthDay)—Most playgrounds are safe for children, but many of them—particularly those in poorer neighborhoods—need improvement, a Chicago-area survey found.

Health created Jan 21, 2013 | popularity 1 / 5 (1) | comments 0

Reduction in air pollution from wood stoves associated with significantly reduced risk of death

Male deaths from all-causes, but particularly cardiovascular and respiratory disease, could be significantly reduced with a decrease in biomass smoke (smoke produced by domestic cooking and heating and woodland fires), a ...

Health created Jan 08, 2013 | popularity not rated yet | comments 1

Half of inhaled diesel soot gets stuck in the lungs: study

The exhaust from diesel-fuelled vehicles, wood fires and coal-driven power stations contains small particles of soot that flow out into the atmosphere. The soot is a scourge for the climate but also for human health. Now ...

Medical research created Jun 27, 2012 | popularity 5 / 5 (1) | comments 0

The Medical Minute: Stay safe around the house this summer

Each of five major child injury hazards -- motor vehicles, drowning, burns, falls and poison -- can be found in the back yard or around your home during the summer. Riding mowers, inflatable pools, home playground equipment ...

Health created Jun 11, 2012 | popularity not rated yet | comments 0

Objective evidence of skin infestation lacking in patients with diagnosis of delusional infestation

Among patients with a diagnosis of delusional skin infestation, neither biopsies nor patient-provided specimens provided objective evidence of skin infestation, according to a report posted online today that will be published ...

Diseases, Conditions, Syndromes created May 16, 2011 | popularity not rated yet | comments 0