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C 4 carbon fixation or the Hatch–Slack pathway is one of three known photosynthetic processes of carbon fixation in plants. It owes the names to the 1960s discovery by Marshall Davidson Hatch and Charles Roger Slack. [1] C 4 fixation is an addition to the ancestral and more common C 3 carbon fixation.
Hugo Peter Kortschak (or Kortschack; 4 September 1911, in Chicago, Illinois – 20 August 1983) [1] was an American biologist who discovered the C4 pathway in 1957. This pathway is an adaptation found in plants which reduces loss of energy via the inefficient C2 pathway. It is found in several plants, such as maize and sugarcane.
Rank Prize in Nutrition in 1981, along with Hugo Kortschak and Roger Slack, for "outstanding work on the mechanism of photosynthesis which established the existence of an alternative pathway for the initial fixation of carbon dioxide in some important food plants". [11] Lemberg Medal in 1974, Australian Society for Biochemistry and Molecular ...
Original mapping by John Snow showing the clusters of cholera cases in the London epidemic of 1854, which is a classical case of using human geography. Human geography or anthropogeography is the branch of geography which studies spatial relationships between human communities, cultures, economies, and their interactions with the environment, examples of which include urban sprawl and urban ...
This glossary of geography terms is a list of definitions of terms and concepts used in geography and related fields, including Earth science, oceanography, cartography, and human geography, as well as those describing spatial dimension, topographical features, natural resources, and the collection, analysis, and visualization of geographic ...
Charles Roger Slack FRS FRSNZ (22 April 1937 – 24 October 2016) was a British-born plant biologist and biochemist who lived and worked in Australia (1962–1970) and New Zealand (1970–2000). In 1966, jointly with Marshall Hatch , he discovered C4 photosynthesis (also known as the Hatch Slack Pathway).
In geography, hydrography, and fluvial geomorphology, a thalweg or talweg (/ ˈ t ɑː l v ɛ ɡ /) is the line or curve of lowest elevation within a valley or watercourse. [1] Its vertical position in maps is the nadir (greatest depth, sounding ) in the stream profile .
Settlement geography is a branch of human geography that investigates the Earth's surface's part settled by humans. According to the United Nations' Vancouver Declaration on Human Settlements (1976), "human settlements means the totality of the human community – whether city, town or village – with all the social, material, organizational, spiritual and cultural elements that sustain it."