118-503: Bowood is a Grade I listed Georgian country house in Wiltshire, England, that has been owned for more than 250 years by the Fitzmaurice family. The house, with interiors by Robert Adam , stands on extensive grounds which include a garden designed by Lancelot "Capability" Brown . It is adjacent to the village of Derry Hill , halfway between Calne and Chippenham . The greater part of
236-572: A cascade method, Swiss chemist and physicist Raoul Pierre Pictet evaporated liquid sulfur dioxide in order to liquefy carbon dioxide, which in turn was evaporated to cool oxygen gas enough to liquefy it. He sent a telegram on December 22, 1877, to the French Academy of Sciences in Paris announcing his discovery of liquid oxygen . Just two days later, French physicist Louis Paul Cailletet announced his own method of liquefying molecular oxygen. Only
354-646: A heritage asset legally protected) is called 'designation'. Several different terms are used because the processes use separate legislation: buildings are 'listed'; ancient monuments are 'scheduled', wrecks are 'protected', and battlefields, gardens and parks are 'registered'. A heritage asset is a part of the historic environment that is valued because of its historic, archaeological, architectural or artistic interest. Only some of these are judged to be important enough to have extra legal protection through designation. Buildings that are not formally listed but still judged as being of heritage interest can still be regarded as
472-530: A hunting lodge , by the former tenant Sir Orlando Bridgeman, 2nd Baronet , who had purchased the property from the Crown . His grandfather Sir Orlando Bridgeman, Lord Chief Justice of the Common Pleas , had been granted the lease by Charles II . Bridgeman got into financial strife, and in 1739 under a Chancery decree , the house and park were acquired by his principal creditor, Richard Long. In 1754 Long sold it to
590-436: A material consideration in the planning process. As a very rough guide, listed buildings are structures considered of special architectural and historical importance. Ancient monuments are of 'national importance' containing evidential values, and can on many occasions also relate to below ground or unoccupied sites and buildings. Almost anything can be listed. Buildings and structures of special historic interest come in
708-645: A building. Listed building consent must be obtained from local authorities before any alteration to a listed structure. There are about 8,500 listed buildings in Northern Ireland, divided into four grades, defined as follows: In Scotland, listing was begun by a provision in the Town and Country Planning (Scotland) Act 1947, and the current legislative basis for listing is the Town and Country Planning (Scotland) Act 1997 . As with other matters regarding planning, conservation
826-630: A colorless and odorless diatomic gas with the chemical formula O 2 . Dioxygen gas currently constitutes 20.95% molar fraction of the Earth's atmosphere , though this has changed considerably over long periods of time in Earth's history . Oxygen makes up almost half of the Earth's crust in the form of various oxides such as water , carbon dioxide , iron oxides and silicates . All eukaryotic organisms , including plants , animals , fungi , algae and most protists , need oxygen for cellular respiration , which extracts chemical energy by
944-463: A commitment to sharing the understanding of the historic environment and more openness in the process of designation. In 2008, a draft Heritage Protection Bill was subject to pre-legislative scrutiny before its passage through UK Parliament. The legislation was abandoned despite strong cross-party support, to make room in the parliamentary legislative programme for measures to deal with the credit crunch, though it may be revived in future. The proposal
1062-434: A few drops of the liquid were produced in each case and no meaningful analysis could be conducted. Oxygen was liquefied in a stable state for the first time on March 29, 1883, by Polish scientists from Jagiellonian University , Zygmunt Wróblewski and Karol Olszewski . In 1891 Scottish chemist James Dewar was able to produce enough liquid oxygen for study. The first commercially viable process for producing liquid oxygen
1180-404: A group that is—for example, all the buildings in a square. This is called 'group value'. Sometimes large areas comprising many buildings may not justify listing but receive the looser protection of designation as a conservation area . The specific criteria include: The state of repair of a building is not generally deemed to be a relevant consideration for listing. Additionally: Although
1298-519: A hermit's cave to the lakeside. The Italianate terrace gardens on the south front of the house were commissioned by the 3rd Marquess. The Upper Terrace, by Sir Robert Smirke , was completed in 1818, and the Lower, by George Kennedy, was added in 1851. Originally planted with hundreds of thousands of annuals in intricate designs, the parterres are now more simply planted. In 1987 the formal garden, pleasure ground, park and woodland were listed as Grade I on
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#17328692040531416-466: A large waterfall, and many gardens incorporating 2 miles (3.2 km) of rhododendron walks in May and June, and carpets of daffodils , narcissi and bluebells in spring. Bowood was laid out over 2,000 acres (8 km) in the 1760s. It replaced an earlier, more formal garden of avenues and wildernesses . Brown's design encompasses a sinuous lake (almost 1 km long), with lawns sloping gently down from
1534-481: A light sky-blue color caused by absorption in the red (in contrast with the blue color of the sky, which is due to Rayleigh scattering of blue light). High-purity liquid O 2 is usually obtained by the fractional distillation of liquefied air. Liquid oxygen may also be condensed from air using liquid nitrogen as a coolant. Liquid oxygen is a highly reactive substance and must be segregated from combustible materials. The spectroscopy of molecular oxygen
1652-451: A list of locally listed buildings as separate to the statutory list (and in addition to it). There is no statutory protection of a building or object on the local list but many receive a degree of protection from loss through being in a Conservation Area or through planning policy. Councils hope that owners will recognise the merits of their properties and keep them unaltered if at all possible. Listing began later in Northern Ireland than in
1770-403: A listed building is a criminal offence and owners can be prosecuted. A planning authority can also insist that all work undertaken without consent be reversed at the owner's expense. See also Category:Grade II* listed buildings for examples of such buildings across England and Wales. See also Category:Grade II listed buildings for examples of such buildings across England and Wales. It
1888-558: A listed building which involves any element of demolition. Exemption from secular listed building control is provided for some buildings in current use for worship, but only in cases where the relevant religious organisation operates its own equivalent permissions procedure. Owners of listed buildings are, in some circumstances, compelled to repair and maintain them and can face criminal prosecution if they fail to do so or if they perform unauthorised alterations. When alterations are permitted, or when listed buildings are repaired or maintained,
2006-674: A listed structure. Applications for consent are made on a form obtained from Historic Environment Scotland. After consulting the local planning authority, the owner, where possible, and an independent third party, Historic Environment Scotland makes a recommendation on behalf of the Scottish Ministers. The scheme for classifying buildings is: There are about 47,400 listed buildings in Scotland. Of these, around 8 percent (some 3,800) are Category A, 50 percent are Category B, and 42 percent are listed at Category C. Although
2124-560: A major role in absorbing energy from singlet oxygen and converting it to the unexcited ground state before it can cause harm to tissues. The common allotrope of elemental oxygen on Earth is called dioxygen , O 2 , the major part of the Earth's atmospheric oxygen (see Occurrence ). O 2 has a bond length of 121 pm and a bond energy of 498 kJ/mol . O 2 is used by complex forms of life, such as animals, in cellular respiration . Other aspects of O 2 are covered in
2242-627: A more comfortable home. Many country houses were knocked down at this period . Before it was demolished, the Adam dining room was auctioned and bought by the Lloyd's of London insurance market, which dismantled it and re-installed it as the Committee Room in its 1958 building . The room was subsequently moved in 1986 to the 11th floor of its current building , also on Lime Street in the City of London . A portico from
2360-545: A non-statutory basis. Although a limited number of 'ancient monuments' were given protection under the Ancient Monuments Protection Act 1882 , there was reluctance to restrict the owners of occupied buildings in their actions related to their property. The extensive damage to buildings caused by German bombing during World War II prompted efforts to list and protect buildings that were deemed to be of particular architectural merit. Three hundred members of
2478-438: A part of air that he called spiritus nitroaereus . In one experiment, he found that placing either a mouse or a lit candle in a closed container over water caused the water to rise and replace one-fourteenth of the air's volume before extinguishing the subjects. From this, he surmised that nitroaereus is consumed in both respiration and combustion. Mayow observed that antimony increased in weight when heated, and inferred that
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#17328692040532596-404: A process called eutrophication and the decay of these organisms and other biomaterials may reduce the O 2 content in eutrophic water bodies. Scientists assess this aspect of water quality by measuring the water's biochemical oxygen demand , or the amount of O 2 needed to restore it to a normal concentration. Paleoclimatologists measure the ratio of oxygen-18 and oxygen-16 in
2714-521: A process of reform, including a review of the criteria used for listing buildings. A Review of Heritage Policy in 2006 was criticised, and the Government began a process of consultation on changes to Planning Policy Guidance 15 , relating to the principles of selection for listing buildings in England. The government's White Paper "Heritage Protection for the 21st Century", published on 8 March 2007, offered
2832-511: A provision in the Town and Country Planning Act 1947 covering England and Wales, and the Town and Country Planning (Scotland) Act 1947 covering Scotland. Listing was first introduced into Northern Ireland under the Planning (Northern Ireland) Order 1972. The listing process has since developed slightly differently in each part of the UK. The process of protecting the built historic environment (i.e. getting
2950-539: A single document, the National Planning Policy Framework . A consultation draft of this was published on 25 July 2011 and the final version on 27 March 2012. This became a material consideration in planning matters on publication. It has since been revised in 2018, 2019 and 2021. The Historic Buildings and Monuments Commission in England and Cadw in Wales list buildings under three grades, with Grade I being
3068-458: A small proportion of manganese dioxide. Oxygen levels in the atmosphere are trending slightly downward globally, possibly because of fossil-fuel burning. At standard temperature and pressure , oxygen is a colorless, odorless, and tasteless gas with the molecular formula O 2 , referred to as dioxygen. As dioxygen , two oxygen atoms are chemically bound to each other. The bond can be variously described based on level of theory, but
3186-449: A triplet electronic ground state . An electron configuration with two unpaired electrons, as is found in dioxygen orbitals (see the filled π* orbitals in the diagram) that are of equal energy—i.e., degenerate —is a configuration termed a spin triplet state. Hence, the ground state of the O 2 molecule is referred to as triplet oxygen . The highest-energy, partially filled orbitals are antibonding , and so their filling weakens
3304-607: A wide variety of forms and types, ranging from telephone boxes and road signs, to castles. Historic England has created twenty broad categories of structures, and published selection guides for each one to aid with assessing buildings and structures. These include historical overviews and describe the special considerations for listing each category. However, in 2020, the Supreme Court ruled in Dill v Secretary of State for Housing, Communities and Local Government and another that buildings in
3422-532: Is a chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table , a highly reactive nonmetal , and a potent oxidizing agent that readily forms oxides with most elements as well as with other compounds . Oxygen is the most abundant element in Earth's crust , and the third-most abundant element in the universe after hydrogen and helium . At standard temperature and pressure , two oxygen atoms will bind covalently to form dioxygen ,
3540-762: Is a power devolved to the Scottish Parliament and the Scottish Government . The authority for listing rests with Historic Environment Scotland (formerly Historic Scotland ), an executive agency of the Scottish Government, which inherited this role from the Scottish Development Department in 1991. The listing system is administered by Historic Environment Scotland on behalf of the Scottish Ministers. Listed building consent must be obtained from local authorities before any alteration to
3658-508: Is associated with the atmospheric processes of aurora and airglow . The absorption in the Herzberg continuum and Schumann–Runge bands in the ultraviolet produces atomic oxygen that is important in the chemistry of the middle atmosphere. Excited-state singlet molecular oxygen is responsible for red chemiluminescence in solution. Table of thermal and physical properties of oxygen (O 2 ) at atmospheric pressure: Naturally occurring oxygen
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3776-469: Is composed of three stable isotopes , O , O , and O , with O being the most abundant (99.762% natural abundance ). Most O is synthesized at the end of the helium fusion process in massive stars but some is made in the neon burning process . O is primarily made by the burning of hydrogen into helium during the CNO cycle , making it a common isotope in the hydrogen burning zones of stars. Most O
3894-441: Is not unusual for historic sites, particularly large sites, to contain buildings with multiple, sometimes varying, designations. For example, Derwent Valley Mills , a World Heritage Site contains 838 listed buildings, made up of 16 listed at Grade I, 42 at Grade II* and 780 at Grade II. A further nine structures are Scheduled monuments . Many councils, for example, Birmingham City Council and Crawley Borough Council , maintain
4012-630: Is often given for Priestley because his work was published first. Priestley, however, called oxygen "dephlogisticated air", and did not recognize it as a chemical element. The name oxygen was coined in 1777 by Antoine Lavoisier , who first recognized oxygen as a chemical element and correctly characterized the role it plays in combustion. Common industrial uses of oxygen include production of steel , plastics and textiles , brazing, welding and cutting of steels and other metals , rocket propellant , oxygen therapy , and life support systems in aircraft , submarines , spaceflight and diving . One of
4130-542: Is possible but is rare. One example is Anmer Hall in Norfolk, which was listed in 1984 and de-listed in 1988. In an emergency, the local planning authority can serve a temporary " Building Preservation Notice " (BPN), if a building is in danger of demolition or alteration in such a way that might affect its historic character. This remains in force for six months until the Secretary of State decides whether or not to formally list
4248-441: Is produced when N (made abundant from CNO burning) captures a He nucleus, making O common in the helium-rich zones of evolved, massive stars . Fifteen radioisotopes have been characterized, ranging from O to O. The most stable are O with a half-life of 122.24 seconds and O with a half-life of 70.606 seconds. All of the remaining radioactive isotopes have half-lives that are less than 27 seconds and
4366-408: Is reasonably and simply described as a covalent double bond that results from the filling of molecular orbitals formed from the atomic orbitals of the individual oxygen atoms, the filling of which results in a bond order of two. More specifically, the double bond is the result of sequential, low-to-high energy, or Aufbau , filling of orbitals, and the resulting cancellation of contributions from
4484-456: Is released as a byproduct . Oxygen is too chemically reactive to remain a free element in air without being continuously replenished by the photosynthetic activities of autotrophs such as cyanobacteria , chloroplast -bearing algae and plants. A much rarer triatomic allotrope of oxygen , ozone ( O 3 ), strongly absorbs the UVB and UVC wavelengths and forms a protective ozone layer at
4602-712: Is temperature-dependent, and about twice as much ( 14.6 mg/L ) dissolves at 0 °C than at 20 °C ( 7.6 mg/L ). At 25 °C and 1 standard atmosphere (101.3 kPa ) of air, freshwater can dissolve about 6.04 milliliters (mL) of oxygen per liter , and seawater contains about 4.95 mL per liter. At 5 °C the solubility increases to 9.0 mL (50% more than at 25 °C) per liter for freshwater and 7.2 mL (45% more) per liter for sea water. Oxygen condenses at 90.20 K (−182.95 °C, −297.31 °F) and freezes at 54.36 K (−218.79 °C, −361.82 °F). Both liquid and solid O 2 are clear substances with
4720-435: Is the result of the oxygen cycle . This biogeochemical cycle describes the movement of oxygen within and between its three main reservoirs on Earth: the atmosphere, the biosphere, and the lithosphere . The main driving factor of the oxygen cycle is photosynthesis , which is responsible for modern Earth's atmosphere. Photosynthesis releases oxygen into the atmosphere, while respiration , decay , and combustion remove it from
4838-457: Is unusual among the planets of the Solar System in having such a high concentration of oxygen gas in its atmosphere: Mars (with 0.1% O 2 by volume) and Venus have much less. The O 2 surrounding those planets is produced solely by the action of ultraviolet radiation on oxygen-containing molecules such as carbon dioxide. The unusually high concentration of oxygen gas on Earth
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4956-517: Is usually given priority in the discovery. The French chemist Antoine Laurent Lavoisier later claimed to have discovered the new substance independently. Priestley visited Lavoisier in October 1774 and told him about his experiment and how he liberated the new gas. Scheele had also dispatched a letter to Lavoisier on September 30, 1774, which described his discovery of the previously unknown substance, but Lavoisier never acknowledged receiving it (a copy of
5074-534: The Department for Environment, Food and Rural Affairs (DEFRA) to deliver the government policy on the protection to historic buildings and other heritage assets. The decision about whether or not to list a building is made by the Secretary of State, although the process is administered in England by Historic England . The listed building system in Wales formerly also operated under the Planning (Listed Buildings and Conservation Areas) Act 1990, as in England, until this
5192-608: The Earth , the Moon , Mars , and meteorites , but were long unable to obtain reference values for the isotope ratios in the Sun , believed to be the same as those of the primordial solar nebula . Analysis of a silicon wafer exposed to the solar wind in space and returned by the crashed Genesis spacecraft has shown that the Sun has a higher proportion of oxygen-16 than does the Earth. The measurement implies that an unknown process depleted oxygen-16 from
5310-556: The Greek roots ὀξύς (oxys) ( acid , literally 'sharp', from the taste of acids) and -γενής (-genēs) (producer, literally begetter), because he mistakenly believed that oxygen was a constituent of all acids. Chemists (such as Sir Humphry Davy in 1812) eventually determined that Lavoisier was wrong in this regard, but by then the name was too well established. Oxygen entered the English language despite opposition by English scientists and
5428-603: The Register of Historic Parks and Gardens of special historic interest in England . A golf course was laid out towards the west of the park in the late 1990s and a hotel was opened nearby on the Home Farm site in 2009. Bowood House is the stately home of the Lansdowne family and has been the residence of: 51°25′43″N 2°02′16″W / 51.4287°N 2.0377°W / 51.4287; -2.0377 Grade I listed In
5546-548: The Republic of Ireland , where buildings are protected under the Planning and Development Act 2000, although the statutory term in Ireland is " protected structure ". A listed building may not be demolished, extended, or altered without permission from the local planning authority, which typically consults the relevant central government agency. In England and Wales , a national amenity society must be notified of any work to be done on
5664-672: The Royal Institute of British Architects and the Society for the Protection of Ancient Buildings were dispatched to prepare the list under the supervision of the Inspectorate of Ancient Monuments, with funding from the Treasury. The listings were used as a means to determine whether a particular building should be rebuilt if it was damaged by bombing, with varying degrees of success. In Scotland,
5782-891: The United Kingdom , a listed building is a structure of particular architectural or historic interest deserving of special protection. Such buildings are placed on one of the four statutory lists maintained by Historic England in England , Historic Environment Scotland in Scotland , Cadw in Wales , and the Historic Environment Division of the Department for Communities in Northern Ireland . The classification schemes differ between England and Wales, Scotland, and Northern Ireland (see sections below). The term has also been used in
5900-484: The blood and carbon dioxide out, and the body's circulatory system then transports the oxygen to other tissues where cellular respiration takes place. However in insects , the most successful and biodiverse terrestrial clade , oxygen is directly conducted to the internal tissues via a deep network of airways . Many major classes of organic molecules in living organisms contain oxygen atoms, such as proteins , nucleic acids , carbohydrates and fats , as do
6018-465: The reaction of oxygen with organic molecules derived from food and releases carbon dioxide as a waste product. In aquatic animals , dissolved oxygen in water is absorbed by specialized respiratory organs called gills , through the skin or via the gut ; in terrestrial animals such as tetrapods , oxygen in air is actively taken into the body via specialized organs known as lungs , where gas exchange takes place to diffuse oxygen into
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#17328692040536136-470: The shells and skeletons of marine organisms to determine the climate millions of years ago (see oxygen isotope ratio cycle ). Seawater molecules that contain the lighter isotope , oxygen-16, evaporate at a slightly faster rate than water molecules containing the 12% heavier oxygen-18, and this disparity increases at lower temperatures. During periods of lower global temperatures, snow and rain from that evaporated water tends to be higher in oxygen-16, and
6254-430: The thermal decomposition of potassium nitrate . In Bugaj's view, the isolation of oxygen and the proper association of the substance to that part of air which is required for life, provides sufficient evidence for the discovery of oxygen by Sendivogius. This discovery of Sendivogius was however frequently denied by the generations of scientists and chemists which succeeded him. It is also commonly claimed that oxygen
6372-553: The 17th and the 18th century but none of them recognized it as a chemical element . This may have been in part due to the prevalence of the philosophy of combustion and corrosion called the phlogiston theory , which was then the favored explanation of those processes. Established in 1667 by the German alchemist J. J. Becher , and modified by the chemist Georg Ernst Stahl by 1731, phlogiston theory stated that all combustible materials were made of two parts. One part, called phlogiston,
6490-558: The 2008 draft legislation was abandoned, Historic England (then part of English Heritage) published a single list of all designated heritage assets within England in 2011. The National Heritage List for England is an online searchable database which includes 400,000 English Listings, this includes individual listed buildings, groups of multiple listed buildings which share the same listing, scheduled monuments, registered parks and gardens, protected historic wrecks and registered battlefields and World Heritage Sites in one place. The 400,000 in
6608-531: The 2s electrons, after sequential filling of the low σ and σ orbitals; σ overlap of the two atomic 2p orbitals that lie along the O–O molecular axis and π overlap of two pairs of atomic 2p orbitals perpendicular to the O–O molecular axis, and then cancellation of contributions from the remaining two 2p electrons after their partial filling of the π orbitals. This combination of cancellations and σ and π overlaps results in dioxygen's double-bond character and reactivity, and
6726-527: The American scientist Robert H. Goddard became the first person to develop a rocket engine that burned liquid fuel; the engine used gasoline for fuel and liquid oxygen as the oxidizer . Goddard successfully flew a small liquid-fueled rocket 56 m at 97 km/h on March 16, 1926, in Auburn, Massachusetts , US. In academic laboratories, oxygen can be prepared by heating together potassium chlorate mixed with
6844-742: The DCLG published Planning Policy Statement 5 , "Planning for the Historic Environment". This replaced PPG15 and set out the government's national policies on the conservation of the historic environment in England. PPS5 was supported by a Practice Guide, endorsed by the DCLG, the DCMS, and English Heritage, which explained how to apply the policies stated in PPS5. In December 2010, the Department for Communities and Local Government announced that in England all PPSs and Planning Policy Guidance Notes would be replaced by
6962-645: The Firestone demolition, the Secretary of State for the Environment , Michael Heseltine , also initiated a complete re-survey of buildings to ensure that everything that merited preservation was on the lists. In England, the Department for Culture, Media and Sport (DCMS) works with Historic England (an agency of the DCMS), and other government departments, e.g. Ministry of Housing, Communities and Local Government (MHCLG) and
7080-511: The Government's Heritage Protection Reform (HPR) report in July 2003 by the DCMS, entitled "Protecting our historic environment: Making the system work better", asked questions about how the current designation systems could be improved. The HPR decision report "Review of Heritage Protection: The Way Forward", a green paper published in June 2004 by the DCMS, committed the UK government and English Heritage to
7198-478: The Philosopher's Stone drawn from the source of nature and manual experience"] (1604) described a substance contained in air, referring to it as 'cibus vitae' (food of life, ) and according to Polish historian Roman Bugaj, this substance is identical with oxygen. Sendivogius, during his experiments performed between 1598 and 1604, properly recognized that the substance is equivalent to the gaseous byproduct released by
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#17328692040537316-480: The Pleasure Grounds, was moved to its present position beside the lake. In 1766, Lady Shelburne visited the landscape garden created by Charles Hamilton on his Surrey estate, Painshill Park . Hamilton was then asked to improve on Capability Brown's design. Working with Josiah Lane, the artisan stonemason who had built a cascade and grotto at Painshill Park, in the 1780s Hamilton added a cascade, grottoes and
7434-438: The Sun's disk of protoplanetary material prior to the coalescence of dust grains that formed the Earth. Oxygen presents two spectrophotometric absorption bands peaking at the wavelengths 687 and 760 nm . Some remote sensing scientists have proposed using the measurement of the radiance coming from vegetation canopies in those bands to characterize plant health status from a satellite platform. This approach exploits
7552-692: The UK's architectural heritage; England alone has 14,500 listed places of worship (4,000 Grade I, 4,500 Grade II* and 6,000 Grade II) and 45% of all Grade I listed buildings are places of worship. Some of the listed churches are no longer in use; between 1969 and 2010, some 1,795 churches were closed by the Church of England , equalling roughly 11% of the stock, with about a third listed as Grade I or Grade II. The criteria for listing include architectural interest, historic interest and close historical associations with significant people or events. Buildings not individually noteworthy may still be listed if they form part of
7670-536: The architectural and historic interest. The Secretary of State, who may seek additional advice from others, then decides whether to list or delist the building. In England, the authority for listing is granted to the Secretary of State by the Planning (Listed Buildings and Conservation Areas) Act 1990 . Listed buildings in danger of decay are listed on the Historic England 'Heritage at Risk' Register . In 1980, there
7788-493: The atmosphere. In the present equilibrium, production and consumption occur at the same rate. Free oxygen also occurs in solution in the world's water bodies. The increased solubility of O 2 at lower temperatures (see Physical properties ) has important implications for ocean life, as polar oceans support a much higher density of life due to their higher oxygen content. Water polluted with plant nutrients such as nitrates or phosphates may stimulate growth of algae by
7906-412: The bond order from three to two. Because of its unpaired electrons, triplet oxygen reacts only slowly with most organic molecules, which have paired electron spins; this prevents spontaneous combustion. In the triplet form, O 2 molecules are paramagnetic . That is, they impart magnetic character to oxygen when it is in the presence of a magnetic field, because of the spin magnetic moments of
8024-548: The building. Until the passing of the Enterprise and Regulatory Reform Act 2013 an application for a Certificate of Immunity from Listing (CoI) could only be made if planning permission was being sought or had been obtained in England. However, the changes brought about by the Act means that now anyone can ask the Secretary of State to issue a Certificate of Immunity in respect of a particular building at any time. In England and Wales,
8142-632: The construction of an enormous drawing room . In World War I, the 5th Marchioness set up an auxiliary Red Cross hospital in the orangery. During World War II , the Big House was first occupied by a school, then by the Royal Air Force . Afterwards it was left empty, and by 1955, it was so dilapidated that the 8th Marquess demolished it, employing architect F. Sortain Samuels to convert the Little House into
8260-407: The decision to list a building may be made on the basis of the architectural or historic interest of one small part of the building, the listing protection nevertheless applies to the whole building. Listing applies not just to the exterior fabric of the building itself, but also to the interior, fixtures, fittings, and objects within the curtilage of the building even if they are not fixed. De-listing
8378-444: The diatomic elemental molecules in those gases. The first commercial method of producing oxygen was chemical, the so-called Brin process involving a reversible reaction of barium oxide . It was invented in 1852 and commercialized in 1884, but was displaced by newer methods in early 20th century. By the late 19th century scientists realized that air could be liquefied and its components isolated by compressing and cooling it. Using
8496-466: The electron spins are paired. It is much more reactive with common organic molecules than is normal (triplet) molecular oxygen. In nature, singlet oxygen is commonly formed from water during photosynthesis, using the energy of sunlight. It is also produced in the troposphere by the photolysis of ozone by light of short wavelength and by the immune system as a source of active oxygen. Carotenoids in photosynthetic organisms (and possibly animals) play
8614-563: The fact that the Englishman Priestley had first isolated the gas and written about it. This is partly due to a poem praising the gas titled "Oxygen" in the popular book The Botanic Garden (1791) by Erasmus Darwin , grandfather of Charles Darwin . John Dalton 's original atomic hypothesis presumed that all elements were monatomic and that the atoms in compounds would normally have the simplest atomic ratios with respect to one another. For example, Dalton assumed that water's formula
8732-491: The first Earl of Shelburne , who engaged the architect Henry Keene to extend the house. William Petty, 2nd Earl of Shelburne , who served as Prime Minister from 1782 to 1783, was created Marquess of Lansdowne to negotiate peace with America after the War of Independence . He furnished Bowood and his London home, Lansdowne House , with superb collections of paintings and classical sculpture, and commissioned Robert Adam to decorate
8850-399: The first known experiments on the relationship between combustion and air was conducted by the 2nd century BCE Greek writer on mechanics, Philo of Byzantium . In his work Pneumatica , Philo observed that inverting a vessel over a burning candle and surrounding the vessel's neck with water resulted in some water rising into the neck. Philo incorrectly surmised that parts of the air in
8968-523: The grander rooms in Bowood and to add a magnificent orangery , as well as a small menagerie for wild animals where a leopard and an orangutan were kept in the 18th century. Adam also built a fine mausoleum in the park for the first earl. Adam commissioned Benjamin Carter to sculpt chimney-pieces for the house. In the 1770s the two parts of the house at Bowood (the "Big House" and the "Little House") were joined by
9086-602: The highest grade, as follows: There was formerly a non-statutory Grade III , which was abolished in 1970. Additionally, Grades A, B and C were used mainly for Anglican churches in active use, loosely corresponding to Grades I, II and III. These grades were used mainly before 1977, although a few buildings are still listed using these grades. In 2010, listed buildings accounted for about 2% of English building stock. In March 2010, there were about 374,000 list entries, of which 92% were Grade II, 5.5% were Grade II* and 2.5% were Grade I. Places of worship are an important part of
9204-567: The house was demolished in 1956. Since 1754 the estate has been the seat of the Earls of Shelburne, created Marquess of Lansdowne in 1784. The ninth and present Marquess is Charles Petty-Fitzmaurice . Notable guests have included Founding Father Benjamin Franklin and Mirabeau , an early leader of the French Revolution , among others. The first house at Bowood was built circa 1725 on the site of
9322-424: The house was re-erected at Roath Court , Cardiff. The mausoleum was designated as Grade I listed in 1960, and the remaining parts of the main house were given the same status in 1972. The remaining house is still large, and the front wing is open to the public with rooms, paintings and sculpture on display. One of the rooms was the laboratory of Joseph Priestley , who discovered oxygen there on 1 August 1774. In
9440-566: The house, and drifts of mature trees. Submerged in the lake are foundations of cottages forming the Mannings Hill hamlet, rediscovered by divers in 2007 in shallow but heavily sedimented water. Brown planted an arboretum of rare trees in the Pleasure Grounds behind the walled garden, and these were added to in the mid-19th century when a pinetum was begun. It was at about this time that the Doric Temple folly , originally situated by Brown in
9558-399: The idea; instead, it was based on observations of what happens when something burns, that most common objects appear to become lighter and seem to lose something in the process. Polish alchemist , philosopher , and physician Michael Sendivogius (Michał Sędziwój) in his work De Lapide Philosophorum Tractatus duodecim e naturae fonte et manuali experientia depromti ["Twelve Treatises on
9676-499: The letter was found in Scheele's belongings after his death). Lavoisier conducted the first adequate quantitative experiments on oxidation and gave the first correct explanation of how combustion works. He used these and similar experiments, all started in 1774, to discredit the phlogiston theory and to prove that the substance discovered by Priestley and Scheele was a chemical element . In one experiment, Lavoisier observed that there
9794-410: The listing should not be confused with the actual number of listed buildings, which will be much larger than the listing, because a listing can include more than one building that share the same listing number. The legislative frameworks for each type of historic asset remains unchanged. A photographic library of English listed buildings was started in 1999 as a snapshot of buildings listed at the turn of
9912-552: The lower stratosphere , which shields the biosphere from ionizing ultraviolet radiation . However, ozone present at the surface is a corrosive byproduct of smog and thus an air pollutant . Oxygen was isolated by Michael Sendivogius before 1604, but it is commonly believed that the element was discovered independently by Carl Wilhelm Scheele , in Uppsala , in 1773 or earlier, and Joseph Priestley in Wiltshire , in 1774. Priority
10030-423: The major constituent inorganic compounds of animal shells, teeth, and bone. Most of the mass of living organisms is oxygen as a component of water, the major constituent of lifeforms. Oxygen in Earth's atmosphere is produced by biotic photosynthesis , in which photon energy in sunlight is captured by chlorophyll to split water molecules and then react with carbon dioxide to produce carbohydrates and oxygen
10148-428: The majority of these have half-lives that are less than 83 milliseconds. The most common decay mode of the isotopes lighter than O is β decay to yield nitrogen, and the most common mode for the isotopes heavier than O is beta decay to yield fluorine . Oxygen is the most abundant chemical element by mass in the Earth's biosphere , air, sea and land. Oxygen is the third most abundant chemical element in
10266-531: The management of listed buildings is the responsibility of local planning authorities and the Ministry of Housing, Communities and Local Government (i.e., not DCMS, which originally listed the building). There is a general principle that listed buildings are put to 'appropriate and viable use' and recognition that this may involve the re-use and modification of the building. However, listed buildings cannot be modified without first obtaining Listed Building Consent through
10384-467: The millennium. This is not an up-to-date record of all listed buildings in England – the listing status and descriptions are only correct as at February 2001. The photographs were taken between 1999 and 2008. It is maintained by the Historic England archive at the Images of England project website. The National Heritage List for England contains the up-to-date list of listed buildings. Oxygen Oxygen
10502-494: The nitroaereus must have combined with it. He also thought that the lungs separate nitroaereus from air and pass it into the blood and that animal heat and muscle movement result from the reaction of nitroaereus with certain substances in the body. Accounts of these and other experiments and ideas were published in 1668 in his work Tractatus duo in the tract "De respiratione". Robert Hooke , Ole Borch , Mikhail Lomonosov , and Pierre Bayen all produced oxygen in experiments in
10620-660: The owners are often required to use specific materials or techniques. Although most sites appearing on the lists are buildings, other structures such as bridges, monuments, sculptures, war memorials, milestones and mileposts , and the Abbey Road zebra crossing made famous by the Beatles , are also listed. Ancient, military, and uninhabited structures, such as Stonehenge , are sometimes instead classified as scheduled monuments and are protected by separate legislation. Cultural landscapes such as parks and gardens are currently "listed" on
10738-560: The process slightly predated the war with the Marquess of Bute (in his connections to the National Trust for Scotland ) commissioning the architect Ian Lindsay in September 1936 to survey 103 towns and villages based on an Amsterdam model using three categories (A, B and C). The basis of the current more comprehensive listing process was developed from the wartime system. It was enacted by
10856-531: The relevant local planning authority. In Wales, applications are made using a form obtained from the relevant local authority. There is no provision for consent to be granted in outline. When a local authority is disposed to grant listed building consent, it must first notify the Welsh Parliament ( i.e. Cadw ) of the application. If the planning authority decides to refuse consent, it may do so without any reference to Cadw. Carrying out unauthorised works to
10974-455: The remainder of this article. Trioxygen ( O 3 ) is usually known as ozone and is a very reactive allotrope of oxygen that is damaging to lung tissue. Ozone is produced in the upper atmosphere when O 2 combines with atomic oxygen made by the splitting of O 2 by ultraviolet (UV) radiation. Since ozone absorbs strongly in the UV region of the spectrum , the ozone layer of
11092-551: The responsibility for the listing process rests with the Historic Environment Division of the Department for Communities , which took over the built heritage functions of the Northern Ireland Environment Agency (formerly the Environment and Heritage Service) following the break up of the Department of the Environment. Following the introduction of listing, an initial survey of Northern Ireland's building stock
11210-561: The rest of the UK: the first provision for listing was contained in the Planning (Northern Ireland) Order 1972; and the current legislative basis for listing is the Planning (Northern Ireland) Order 1991. Under Article 42 of the Order, the relevant Department of the Northern Ireland Executive is required to compile lists of buildings of "special architectural or historic interest". Since 2016,
11328-451: The scheme must meet certain criteria – "a three-fold test which involved considering size, permanence and degree of physical attachment" – referred to as the Skerritts test in reference to a previous legal case in England. Both Historic Environment Scotland and Cadw produce guidance for owners. In England, to have a building considered for listing or delisting, the process is to apply to
11446-414: The seawater left behind tends to be higher in oxygen-18. Marine organisms then incorporate more oxygen-18 into their skeletons and shells than they would in a warmer climate. Paleoclimatologists also directly measure this ratio in the water molecules of ice core samples as old as hundreds of thousands of years. Planetary geologists have measured the relative quantities of oxygen isotopes in samples from
11564-413: The secretary of state; this can be done by submitting an application form online to Historic England . The applicant does not need to be the owner of the building to apply for it to be listed. Full information including application form guidance notes are on the Historic England website. Historic England assesses buildings put forward for listing or delisting and provides advice to the Secretary of State on
11682-486: The universe, after hydrogen and helium. About 0.9% of the Sun 's mass is oxygen. Oxygen constitutes 49.2% of the Earth's crust by mass as part of oxide compounds such as silicon dioxide and is the most abundant element by mass in the Earth's crust . It is also the major component of the world's oceans (88.8% by mass). Oxygen gas is the second most common component of the Earth's atmosphere , taking up 20.8% of its volume and 23.1% of its mass (some 10 tonnes). Earth
11800-401: The unpaired electrons in the molecule, and the negative exchange energy between neighboring O 2 molecules. Liquid oxygen is so magnetic that, in laboratory demonstrations, a bridge of liquid oxygen may be supported against its own weight between the poles of a powerful magnet. Singlet oxygen is a name given to several higher-energy species of molecular O 2 in which all
11918-435: The upper atmosphere functions as a protective radiation shield for the planet. Near the Earth's surface, it is a pollutant formed as a by-product of automobile exhaust . At low earth orbit altitudes, sufficient atomic oxygen is present to cause corrosion of spacecraft . The metastable molecule tetraoxygen ( O 4 ) was discovered in 2001, and was assumed to exist in one of the six phases of solid oxygen . It
12036-451: The vessel were converted into the classical element fire and thus were able to escape through pores in the glass. Many centuries later Leonardo da Vinci built on Philo's work by observing that a portion of air is consumed during combustion and respiration . In the late 17th century, Robert Boyle proved that air is necessary for combustion. English chemist John Mayow (1641–1679) refined this work by showing that fire requires only
12154-418: The year 2000, Bowood House was designated an ACS National Historic Chemical Landmark in recognition of the importance of Priestley's discovery. The lake was formed at the sacrifice of a village called Manning's Hill, which to this day remains submerged. In 2007, divers found the remains of two cottages and stone walls under the water. On the grounds are an adventure playground for children aged 12 and under,
12272-428: Was HO, leading to the conclusion that the atomic mass of oxygen was 8 times that of hydrogen, instead of the modern value of about 16. In 1805, Joseph Louis Gay-Lussac and Alexander von Humboldt showed that water is formed of two volumes of hydrogen and one volume of oxygen; and by 1811 Amedeo Avogadro had arrived at the correct interpretation of water's composition, based on what is now called Avogadro's law and
12390-564: Was begun in 1974. By the time of the completion of this First Survey in 1994, the listing process had developed considerably, and it was therefore decided to embark upon a Second Survey, which is still ongoing, to update and cross-check the original information. Information gathered during this survey, relating to both listed and unlisted buildings, is entered into the publicly accessible Northern Ireland Buildings Database. A range of listing criteria, which aim to define architectural and historic interest, are used to determine whether or not to list
12508-408: Was first discovered by Swedish pharmacist Carl Wilhelm Scheele . He had produced oxygen gas by heating mercuric oxide (HgO) and various nitrates in 1771–72. Scheele called the gas "fire air" because it was then the only known agent to support combustion. He wrote an account of this discovery in a manuscript titled Treatise on Air and Fire , which he sent to his publisher in 1775. That document
12626-451: Was given off when the substance containing it was burned, while the dephlogisticated part was thought to be its true form, or calx . Highly combustible materials that leave little residue , such as wood or coal, were thought to be made mostly of phlogiston; non-combustible substances that corrode, such as iron, contained very little. Air did not play a role in phlogiston theory, nor were any initial quantitative experiments conducted to test
12744-491: Was independently developed in 1895 by German engineer Carl von Linde and British engineer William Hampson . Both men lowered the temperature of air until it liquefied and then distilled the component gases by boiling them off one at a time and capturing them separately. Later, in 1901, oxyacetylene welding was demonstrated for the first time by burning a mixture of acetylene and compressed O 2 . This method of welding and cutting metal later became common. In 1923,
12862-445: Was no overall increase in weight when tin and air were heated in a closed container. He noted that air rushed in when he opened the container, which indicated that part of the trapped air had been consumed. He also noted that the tin had increased in weight and that increase was the same as the weight of the air that rushed back in. This and other experiments on combustion were documented in his book Sur la combustion en général , which
12980-462: Was not sensibly different from that of common air , but I fancied that my breast felt peculiarly light and easy for some time afterwards." Priestley published his findings in 1775 in a paper titled "An Account of Further Discoveries in Air", which was included in the second volume of his book titled Experiments and Observations on Different Kinds of Air . Because he published his findings first, Priestley
13098-408: Was proven in 2006 that this phase, created by pressurizing O 2 to 20 GPa , is in fact a rhombohedral O 8 cluster . This cluster has the potential to be a much more powerful oxidizer than either O 2 or O 3 and may therefore be used in rocket fuel . A metallic phase was discovered in 1990 when solid oxygen is subjected to a pressure of above 96 GPa and it
13216-486: Was public outcry at the sudden destruction of the art deco Firestone Tyre Factory ( Wallis, Gilbert and Partners , 1928–29). It was demolished over the August bank holiday weekend by its owners Trafalgar House , who had been told that it was likely to be 'spot-listed' a few days later. In response, the government undertook to review arrangements for listing buildings in order to protect worthy ones from such demolition. After
13334-499: Was published in 1777. In the meantime, on August 1, 1774, an experiment conducted by the British clergyman Joseph Priestley focused sunlight on mercuric oxide contained in a glass tube, which liberated a gas he named "dephlogisticated air". He noted that candles burned brighter in the gas and that a mouse was more active and lived longer while breathing it. After breathing the gas himself, Priestley wrote: "The feeling of it to my lungs
13452-458: Was published in 1777. In that work, he proved that air is a mixture of two gases; 'vital air', which is essential to combustion and respiration, and azote (Gk. ἄζωτον "lifeless"), which did not support either. Azote later became nitrogen in English, although it has kept the earlier name in French and several other European languages. Lavoisier renamed 'vital air' to oxygène in 1777 from
13570-500: Was replaced in 2024 with Wales-specific heritage legislation. In Wales, the authority for listing is granted to the Welsh Ministers by section 76 of the Historic Environment (Wales) Act 2023, although the listing system is in practice administered by Cadw . There have been several attempts to simplify the heritage planning process for listed buildings in England. As of 2021, few changes had been implemented. The review process
13688-420: Was shown in 1998 that at very low temperatures, this phase becomes superconducting . Oxygen dissolves more readily in water than nitrogen, and in freshwater more readily than in seawater. Water in equilibrium with air contains approximately 1 molecule of dissolved O 2 for every 2 molecules of N 2 (1:2), compared with an atmospheric ratio of approximately 1:4. The solubility of oxygen in water
13806-557: Was started in February 2000 by Alan Howarth , then minister at the Department for Culture, Media and Sport (DCMS). The outcome was the paper "Power of Place" in December 2000, followed by the subsequent policy document "The Historic Environment: A Force for Our Future", published by the DCMS and the Department of the Environment, Transport and the Regions (DTLR) in December 2001. The launch of
13924-692: Was that the existing registers of buildings, parks and gardens, archaeology and battlefields, maritime wrecks, and World Heritage Sites be merged into a single online register that will "explain what is special and why". English Heritage would become directly responsible for identifying historic assets in England and there would be wider consultation with the public and asset owners, and new rights of appeal. There would have been streamlined systems for granting consent for work on historic assets. After several years of consultation with heritage groups, charities, local planning authorities, and English Heritage, in March 2010,
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