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Carbon monoxide causes endothelial cell and platelet release of nitric oxide, and the formation of oxygen free radicals including peroxynitrite. [29] In the brain this causes further mitochondrial dysfunction, capillary leakage, leukocyte sequestration, and apoptosis . [ 150 ]
Schematic cross section of a pressurized caisson. In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson 'box', from Italian cassone 'large box', an augmentative of cassa) is a watertight retaining structure [1] used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ships.
An enclosed smoking area in a Japanese train station. Notice the air vent on the roof. In June 1967, the US Federal Communications Commission ruled that programmes broadcast on a television station which discussed smoking and health were insufficient to offset the effects of paid advertisements that were broadcast for five to ten minutes each day.
This system is responsible for lifting the wings during a recovery stroke. As the thorax is compressed by the flight muscles during a downstroke, the upper ends of the furcula spread apart, expanding by as much as 50% of its resting width, and then contract. Furcula may also aid in respiration, by helping to pump air through the air sacs. [231 ...
Photosynthetic cells use the sun's energy to split off water's hydrogen from oxygen. [107] In the presence of sunlight, hydrogen is combined with CO 2 (absorbed from air or water) to form glucose and release oxygen. [108] All living cells use such fuels and oxidize the hydrogen and carbon to capture the sun's energy and reform water and CO
A microorganism, or microbe, [a] is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells.. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India.
The Smart Fortwo (stylized as "smart fortwo") is a two-seater city car manufactured and marketed by the Smart division of the Mercedes-Benz Group for model years 1998–2024, across three generations — each using a rear-engine, rear-wheel-drive layout and a one-box design.
In 2009, 16.6% of the world's intake of animal protein and 6.5% of all protein consumed came from fish. [159] In order to fulfill this need, coastal countries have exploited marine resources in their exclusive economic zone , although fishing vessels are increasingly venturing further afield to exploit stocks in international waters. [ 160 ]