An oil is any substance that is liquid at ambient temperatures and does not mix with water but may mix with other oils and organic solvents. This general definition includes vegetable oils, volatile essential oils, petrochemical oils, and synthetic oils.

Etymology[link]

First attested in English 1176, the word oil comes from Old French "oile", from Latin "oleum",^[1] which in turn comes from the Greek "ἔλαιον" (elaion), "olive oil, oil"^[2] and that from "ἐλαία" (elaia), "olive tree".^[3] The earliest attested form of the word is the Mycenaean Greek e-ra-wo, written in Linear B syllabic script.^[4]

Types[link]

This unreferenced section requires citations to ensure verifiability.

Organic oils[link]

Organic oils are produced in remarkable diversity by plants, animals, and other organisms through natural metabolic processes. Lipid is the scientific term for the fatty acids, steroids and similar chemicals often found in the oils produced by living things, while oil refers to an overall mixture of chemicals. Organic oils may also contain chemicals other than lipids, including proteins, waxes and alkaloids.

Lipids can be classified by the way that they are made by an organism, their chemical structure and their limited solubility in water compared to oils. They have a high carbon and hydrogen content and are considerably lacking in oxygen compared to other organic compounds and minerals; they tend to be relatively nonpolar molecules, but may include both polar and nonpolar regions as in the case of phospholipids and steroids.^[5]

Mineral oils[link]

Crude oil, or petroleum, and its refined components, collectively termed petrochemicals, are crucial resources in the modern economy. Crude oil originates from ancient fossilized organic materials, such as zooplankton and algae, which geochemical processes convert into oil.^[6] It is classified as a mineral oil because it does not have an organic origin on human timescales, but is instead obtained from rocks, underground traps, or sands. Mineral oil also refers to several specific distillates of crude oil.

Applications[link]

This unreferenced section requires citations to ensure verifiability.

A bottle of olive oil used in food

Cosmetics[link]

Oils are applied to hair to give it a lustrous look, to prevent tangles and roughness and to stabilize the hair to promote growth.^{[citation needed]} See Hair conditioner.

Religion[link]

Oils are commonly used in ritual anointments. As a particular example, holy anointing oil has been an important ritual liquid for Judaism and Christianity.

Painting[link]

Color pigments are easily suspended in oil, making it suitable as a supporting medium for paints. The oldest known extant oil paintings date from 650 AD.^[7]

Heat transfer[link]

Oils are used as coolants in oil cooling, for instance in electric transformers. Oils are also used to enhance heating in other applications, such as cooking (especially in frying).

Lubrication[link]

Oils are commonly used as lubricants. Mineral oils are more commonly used as machine lubricants than biological oils are.

Fuel[link]

Some oils burn in liquid or aerosol form, generating heat which can be used directly or converted into other forms of energy such as electricity or mechanical work. To obtain many fuel oils, crude oil is pumped from the ground and is shipped via oil tanker to an oil refinery. There, it is converted from crude oil to diesel fuel (petrodiesel), ethane (and other short-chain alkanes), fuel oils (heaviest of commercial fuels, used in ships/furnaces), gasoline (petrol), jet fuel, kerosene, benzene (historically), and liquefied petroleum gas. A 42 gallon barrel (U.S.) of crude oil produces approximately 10 gallons of diesel, 4 gallons of jet fuel, 19 gallons of gasoline, 7 gallons of other products, 3 gallons split between heavy fuel oil and liquified petroleum gases,^[8] and 2 gallons of heating oil. The total production of a barrel of crude into various products results in an increase to 45 gallons.^[8] Not all oils used as fuels are mineral oils, see biodiesel and vegetable oil fuel.

Chemical feedstock[link]

Crude oil can be refined into a wide variety of component hydrocarbons. Petrochemicals are the refined components of crude oil and the chemical products made from them. They are used as detergents, fertilizers, medicines, paints, plastics, synthetic fibers, and synthetic rubber. Organic oils are another important chemical feedstock, especially in green chemistry.

See also[link]

• Cooking oil
• Emulsifier, a chemical which allows oil and water to mix
• Lubrication
• Wax, a class of compounds with oil-like properties that are solid at common temperatures

References[link]

This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. (October 2009)

External links[link]

Wikimedia Commons has media related to: Oil

• Petroleum Online e-Learning resource from IHRDC

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2008)

News is the communication of selected^[1] information on current events which is presented by print, broadcast, Internet, or word of mouth to a third-party or mass audience.

Etymology[link]

One theory claims that the English word "news" developed in the 14th century as a special use of the plural form of "new". In Middle English, the equivalent word was newes, like the French nouvelles and the German neues. Similar developments are found in the Slavic languages – the Czech and Slovak noviny (from nový, "new"), the cognate Polish nowiny and Russian novosti – and in the Celtic languages: the Welsh newyddion (from newydd) and the Cornish nowodhow (from nowydh).

History[link]

Before the invention of newspapers in the early 17th century, official government bulletins and edicts were circulated at times in some centralized empires.^[2]

The first documented use of an organized courier service for the diffusion of written documents is in Egypt, where Pharaohs used couriers for the diffusion of their decrees in the territory of the State (2400 BC).^[3] This practice almost certainly has roots in the much older practice of oral messaging and may have been built on a pre-existing infrastructure.

In Ancient Rome, Acta Diurna, or government announcement bulletins, were made public by Julius Caesar. They were carved in metal or stone and posted in public places.

In China, early government-produced news sheets, called tipao, circulated among court officials during the late Han dynasty (second and third centuries AD). Between 713 and 734, the Kaiyuan Za Bao ("Bulletin of the Court") of the Chinese Tang Dynasty published government news; it was handwritten on silk and read by government officials. In 1582 there was the first reference to privately published newssheets in Beijing, during the late Ming Dynasty.^[4]

In Early modern Europe, increased cross-border interaction created a rising need for information which was met by concise handwritten newssheets. In 1556, the government of Venice first published the monthly Notizie scritte, which cost one gazetta.^[5] These avvisi were handwritten newsletters and used to convey political, military, and economic news quickly and efficiently to Italian cities (1500–1700) — sharing some characteristics of newspapers though usually not considered true newspapers.^[6] Due to low literacy rates, news was at times disseminated by town criers.

Relation aller Fürnemmen und gedenckwürdigen Historien, from 1605, is recognized as the world's first newspaper.^[7]

The oldest news agency is the Agence France-Presse (AFP).^[8] It was founded in 1835 by a Parisian translator and advertising agent, Charles-Louis Havas as Agence Havas.

In modern times, printed news had to be phoned in to a newsroom or brought there by a reporter, where it was typed and either transmitted over wire services or edited and manually set in type along with other news stories for a specific edition. Today, the term "breaking news" has become trite as commercial broadcasting United States cable news services that are available 24-hours a day use live satellite technology to bring current events into consumers' homes as the event occurs. Events that used to take hours or days to become common knowledge in towns or in nations are fed instantaneously to consumers via radio, television, mobile phone, and the Internet.

Newspapers[link]

Most large cities in the United States historically had morning and afternoon newspapers. As the media evolved and news outlets increased to the point of near over-saturation, most afternoon newspapers were shut down. Morning newspapers have been gradually losing circulation, according to reports advanced by the papers themselves. Commonly, news content should contain the "Five Ws" (who, what, when, where, why, and also how) of an event. There should be no questions remaining. Newspapers normally place hard news stories on the first pages, so the most important information is at the beginning. Busy readers can read as little or as much as they desire. Local stations and networks with a set format must take news stories and break them down into the most important aspects due to time constraints. Cable news channels such as BBC News, Fox News, MSNBC, and CNN, are able to take advantage of a story, sacrificing other, decidedly less important stories, and giving as much detail about breaking news as possible.

News organizations are often expected to aim for objectivity; reporters claim to try to cover all sides of an issue without bias, as compared to commentators or analysts, who provide opinion or personal point-of-view. The result is a laying out of facts in a sterile, noncommittal manner, and then standing back to "let the reader decide" which view is true.^[9] Several governments impose certain constraints or police news organizations against bias. In the United Kingdom, for example, limits are set by the government agency Ofcom, the Office of Communications. Both newspapers and broadcast news programs in the United States are generally expected to remain neutral and avoid bias except for clearly indicated editorial articles or segments. Many single-party governments have operated state-run news organizations, which may present the government's views.

Even in those situations where objectivity is expected, it is difficult to achieve, and individual journalists may fall foul of their own personal bias, or succumb to commercial or political pressure. Similarly, the objectivity of news organizations owned by conglomerated corporations fairly may be questioned, in light of the natural incentive for such groups to report news in a manner intended to advance the conglomerate's financial interests. Individuals and organizations who are the subject of news reports may use news management techniques to try to make a favourable impression.^[10] Because each individual has a particular point of view, it is recognized that there can be no absolute objectivity in news reporting.^[11]

Newsworthiness[link]

Newsworthiness is defined as a subject having sufficient relevance to the public or a special audience to warrant press attention or coverage.^[12]

In some countries and at some points in history, what news media and the public have considered "newsworthy" has met different definitions, such as the notion of news values.^[13] For example, mid-twentieth-century news reporting in the United States focused on political and local issues with important socio-economic impacts, such as the landing of a living person on the moon or the cold war. More recently, the focus similarly remains on political and local issues; however, the news mass media now comes under criticism for over-emphasis on "non-news" and "gossip" such as celebrities' personal social issues, local issues of little merit, as well as biased sensationalism of political topics such as terrorism and the economy. The dominance of celebrity and social news, the blurring of the boundary between news and reality shows and other popular culture, and the advent of citizen journalism may suggest that the nature of ‘news’ and news values are evolving and that traditional models of the news process are now only partially relevant.^[14] Newsworthiness does not only depend on the topic, but also the presentation of the topic and the selection of information from that topic.

New ecology of news[link]

“Everything we thought we once knew about journalism needs to be rethought in the Digital Age”,^[15] professor of Sociology and Communication Michael Schudson points out. Today the work of journalism can be done from anywhere and done well. It requires no more than a reporter and a laptop. In that way, journalistic authority seems to have become more individual- and less institution-based. But does the individual reporter always have to be an actual journalist? Or can journalistic work be done from anywhere and by anyone? These are questions that refers to the core of journalistic practice and the definition of “news” itself. As Schudson has given emphasis to, the answer is not easily found; “the ground journalists walk upon is shaking, and the experience for both those who work in the field and those on the outside studying it is dizzying”.^[15]

Schudson has identified the following six specific areas where the ecology of news in his opinion has changed: 1. The line between the reader and writer has blurred 2. The distinction among tweet, blog post, newspaper story, magazine article, and book has blurred 3. The line between professionals and amateurs has blurred, and a variety of “pro-am” relationships has emerged 4. The boundaries delineating for-profit, public, and non-profit media have blurred, and the cooperation across these models of financing has developed 5. Within commercial news organizations, the line between the news room and the business office has blurred 6. The line between old media and new media has blurred, practically beyond recognition ^[16]

These alterations inevitably has fundamental ramifications for the contemporary ecology of news. “The boundaries of journalism, which just a few years ago seemed relatively clear, and permanent, have become less distinct, and this blurring, while potentially the foundation of progress even as it is the source of risk, has given rise to a new set of journalistic principles and practices”,^[17] Schudson puts it. It is indeed complex, but it seems to be the future.

References[link]

Further reading[link]

• Stephens, Mitchell. "The History of News - 3rd Ed" Oxford University Press, New York, 2007.

External links[link]

• News media by country at the Open Directory Project