Highland
The term highland or uplands is used to denote any mountainous region or elevated mountainous plateau. Generally speaking, upland (or uplands) tends to refer to ranges of hills, typically up to 500-600 m. Highland (or highlands) is usually reserved for ranges of low mountains.
Highlands worldwide
Probably the most known highlands in the anglophone world are the Scottish Highlands in the United Kingdom, the mountainous region north and west of the Highland Boundary Fault. The Highland council area is a local government area in the Scottish Highlands and Britain's largest local government area.
Many countries have areas that are officially or unofficially referred to as highlands. Other than Scotland, these include parts Ethiopia, Kenya, Eritrea, Yemen, Nigeria, Papua New Guinea, Syria, Cantabria and Nova Scotia (the latter being Latin for 'New Scotland' due to its resemblance to the country).
Synonymous terms used in other countries include high country, used in New Zealand, New South Wales, Victoria, Tasmania and Southern Queensland in Australia, and parts of the United States (notably Western North Carolina), and highveld, used in South Africa.
Highlands (album)
Highlands is the ninth album by the Christian rock band White Heart and the band's last album with Star Song Records.
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Scottish Highlands
The Highlands (Scottish Gaelic: A' Ghàidhealtachd, "the place of the Gaels"; Scots: the Hielands) are a historic region of Scotland. The region became culturally distinguishable from the Lowlands from the later Middle Ages into the modern period, when Lowland Scots replaced Scottish Gaelic throughout most of the Lowlands. The term is also used for the area north and west of the Highland Boundary Fault, although the exact boundaries are not clearly defined, particularly to the east. The Great Glen divides the Grampian Mountains to the southeast from the Northwest Highlands. The Scottish Gaelic name of A' Ghàidhealtachd literally means "the place of the Gaels" and traditionally, from a Gaelic-speaking point of view, includes both the Western Isles and the Highlands.
The area is very sparsely populated, with many mountain ranges dominating the region, and includes the highest mountain in the British Isles, Ben Nevis. Before the 19th century the Highlands was home to a much larger population, but due to a combination of factors including the outlawing of the traditional Highland way of life following the Jacobite Rising of 1745, the infamous Highland Clearances, and mass migration to urban areas during the Industrial Revolution, the area is now one of the most sparsely populated in Europe. At 9.1 per km2 in 2012, the population density in the Highlands and Islands is less than 1/7th of Scotland's as a whole, comparable with that of Bolivia, Chad and Russia.
Catalysis
Catalysis (/kəˈtælᵻsᵻs/) is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst (/ˈkætəlᵻst/). With a catalyst, reactions occur faster and require less activation energy. Because catalysts are not consumed in the catalyzed reaction, they can continue to catalyze the reaction of further quantities of reactant. Often only tiny amounts are required.
Technical perspective
In the presence of a catalyst, less free energy is required to reach the transition state, but the total free energy from reactants to products does not change. A catalyst may participate in multiple chemical transformations. The effect of a catalyst may vary due to the presence of other substances known as inhibitors or poisons (which reduce the catalytic activity) or promoters (which increase the activity). The opposite of a catalyst, a substance that reduces the rate of a reaction, is an inhibitor.
Catalyzed reactions have a lower activation energy (rate-limiting free energy of activation) than the corresponding uncatalyzed reaction, resulting in a higher reaction rate at the same temperature and for the same reactant concentrations. However, the detailed mechanics of catalysis is complex. Catalysts may affect the reaction environment favorably, or bind to the reagents to polarize bonds, e.g. acid catalysts for reactions of carbonyl compounds, or form specific intermediates that are not produced naturally, such as osmate esters in osmium tetroxide-catalyzed dihydroxylation of alkenes, or cause dissociation of reagents to reactive forms, such as chemisorbed hydrogen in catalytic hydrogenation.
Catalyst (disambiguation)
A catalyst is a substance which increases the rate of a chemical reaction.
Catalyst may also refer to:
Buildings
Economics and finance
Events
Media and entertainment
Games
Literature and publications
Catalyst (TV program)
Catalyst is the ABC's primary science journalism television series and the only science show on primetime television in Australia. Launched in 2001, it replaced Quantum, which had ceased the previous year. Catalyst is regularly broadcast on ABC 1 at 8:00 pm on Tuesdays and at 11:30 am Saturdays. Also repeated on ABC News 24 on Saturdays at 4:30 pm.
Catalyst celebrated its tenth year of production in 2010.
Description
The show broadcasts stories on scientific themes, and in particular significant recent developments and discoveries. It focuses primarily on stories relevant to Australia, but the series covers international developments as well. It attempts to convey information in a way that is not only accurate but also interesting and informative to the general population, often discussing the ethical, political, and other implications of scientific discoveries and research as well as the discoveries themselves.
The show's website describes it as follows:
Each week Catalyst brings you stories from Australia and around the world.
Fling
Fling may refer to:
See also
Podcasts:
