|
Inductively Coupled Plasma Emission Spectrometry
Inductively coupled plasma atomic emission spectroscopy (ICP-AES), also referred to as inductively coupled plasma optical emission spectroscopy (ICP-OES), is an analytical technique used for the detection of chemical elements. It is a type of emission spectroscopy that uses the inductively coupled plasma to produce excited atoms and ions that emit electromagnetic radiation at wavelengths characteristic of a particular element. The plasma is a high temperature source of ionised source gas (often argon). The plasma is sustained and maintained by inductive coupling from cooled electrical coils at megahertz frequencies. The source temperature is in the range from 6000 to 10,000 K. The intensity of the emissions from various wavelengths of light are proportional to the concentrations of the elements within the sample. Mechanism The ICP-AES is composed of two parts: the ICP and the optical spectrometer. The ICP torch consists of 3 concentric quartz glass tubes. The output or "work" coil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spectrometer ICP-OES
A spectrometer () is a scientific instrument used to separate and measure spectral components of a physical phenomenon. Spectrometer is a broad term often used to describe instruments that measure a continuous variable of a phenomenon where the spectral components are somehow mixed. In visible light a spectrometer can separate white light and measure individual narrow bands of color, called a spectrum. A mass spectrometer measures the spectrum of the masses of the atoms or molecules present in a gas. The first spectrometers were used to split light into an array of separate colors. Spectrometers were developed in early studies of physics, astronomy, and chemistry. The capability of spectroscopy to determine chemical composition drove its advancement and continues to be one of its primary uses. Spectrometers are used in astronomy to analyze the chemical composition of stars and planets, and spectrometers gather data on the origin of the universe. Examples of spectrometers are d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats. It is the distance between consecutive corresponding points of the same phase on the wave, such as two adjacent crests, troughs, or zero crossings, and is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. The inverse of the wavelength is called the spatial frequency. Wavelength is commonly designated by the Greek letter ''lambda'' (λ). The term ''wavelength'' is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids. Assuming a sinusoidal wave moving at a fixed wave speed, wavelength is inversely proportional to frequency of the wave: waves with higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths. Wavelength depends on the medium (for example, vacuum, air, or water) that a wav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shepton Mallet
Shepton Mallet is a market town and civil parish in the Mendip District of Somerset, England, some south-west of Bath, south of Bristol and east of Wells. It had an estimated population of 10,810 in 2019. Mendip District Council is based there. The Mendip Hills lie to the north and the River Sheppey runs through the town, as does the route of the Fosse Way, the main Roman road between north-east and south-west England. There is evidence of Roman settlement. Its listed buildings include a medieval parish church. Shepton Mallet Prison was England's oldest, but closed in March 2013. The medieval wool trade gave way to trades such as brewing in the 18th century. It remains noted for cider production. It is the closest town to the Glastonbury Festival and nearby the Royal Bath and West of England Society showground. History Etymology The name Shepton derives from the Old English ''scoep'' and ''tun'', meaning "sheep farm"; the ''Domesday Book'' of 1086 records a settlement kn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amulet
An amulet, also known as a good luck charm or phylactery, is an object believed to confer protection upon its possessor. The word "amulet" comes from the Latin word amuletum, which Pliny's ''Natural History'' describes as "an object that protects a person from trouble". Anything can function as an amulet; items commonly so used include statues, coins, drawings, plant parts, animal parts, and written words. Amulets which are said to derive their extraordinary properties and powers from magic or those which impart luck are typically part of folk religion or paganism, whereas amulets or sacred objects of formalised mainstream religion as in Christianity are believed to have no power of their own without faith in Jesus and being blessed by a clergyman, and they supposedly will also not provide any preternatural benefit to the bearer who does not have an appropriate disposition. Talisman and amulets have interchangeable meaning. Amulets refer to any object which has the power to av ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chi Rho
The Chi Rho (☧, English pronunciation ; also known as ''chrismon'') is one of the earliest forms of Christogram, formed by superimposing the first two (capital) letters— chi and rho (ΧΡ)—of the Greek word ( Christos) in such a way that the vertical stroke of the rho intersects the center of the chi. The Chi-Rho symbol was used by the Roman Emperor Constantine I (r. 306–337 AD) as part of a military standard (vexillum). Constantine's standard was known as the Labarum. Early symbols similar to the Chi Rho were the Staurogram () and the IX monogram (). In pre-Christian times, the Chi-Rho symbol was also used to mark a particularly valuable or relevant passage in the margin of a page, abbreviating ''chrēston'' (good). Some coins of Ptolemy III Euergetes (r. 246–222 BC) were marked with a Chi-Rho. Although formed of Greek characters, the device (or its separate parts) is frequently found serving as an abbreviation in Latin text, with endings added appropriate t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liverpool University
, mottoeng = These days of peace foster learning , established = 1881 – University College Liverpool1884 – affiliated to the federal Victoria Universityhttp://www.legislation.gov.uk/ukla/2004/4 University of Manchester Act 2004. legislation.gov.uk (4 July 2011). Retrieved on 14 September 2011.1903 – royal charter , type = Public , endowment = £190.2 million (2020) , budget = £597.4 million (2020–21) , city = Liverpool , country = England , campus = Urban , coor = , chancellor = Colm Tóibín , vice_chancellor = Dame Janet Beer , head_label = Visitor , head = The Lord President of the Council ''ex officio'' , students = () , undergrad = () , postgrad = () , colours = The University , affiliations = Russell Group, EUA, N8 Group, NWUA, AACSB, AMBA, EQUIS, EASN, Universities UK , website = , logo = University ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mineral Processing
In the field of extractive metallurgy, mineral processing, also known as ore dressing, is the process of separating commercially valuable minerals from their ores. History Before the advent of heavy machinery the raw ore was broken up using hammers wielded by hand, a process called "spalling". Before long, mechanical means were found to achieve this. For instance, stamp mills were used in Samarkand as early as 973. They were also in use in medieval Persia. By the 11th century, stamp mills were in widespread use throughout the medieval Islamic world, from Islamic Spain and North Africa in the west to Central Asia in the east. A later example was the Cornish stamps, consisting of a series of iron hammers mounted in a vertical frame, raised by cams on the shaft of a waterwheel and falling onto the ore under gravity. The simplest method of separating ore from gangue consists of picking out the individual crystals of each. This is a very tedious process, particularly when the in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albright & Wilson
Albright may refer to: *Albright (surname) *Albright, Alberta, Canada *Albright, West Virginia, United States *Albright College, a liberal arts college located in Reading, Pennsylvania, United States *Albright–Knox Art Gallery, Buffalo, New York, United States *Albright Memorial Building, Scranton, Pennsylvania, United States *Albright special The Albright special The complete guide to knots and knot tying — Geoffrey Budworth — p.70 — or Albright knot is a bend used in angling. It is a strong knot used to tie two different diameters of line together, for instance to tie monofila ..., a knot See also * Allbright, Missouri, United States {{disambiguation, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eugen Bădărău
Eugen is a masculine given name which may refer to: * Archduke Eugen of Austria (1863–1954), last Habsburg Grandmaster of the Teutonic Order from 1894 to 1923 * Prince Eugen, Duke of Närke (1865–1947), Swedish painter, art collector, and patron of artists * Prince Eugen of Schaumburg-Lippe (1899–1929) * Prince Eugen of Bavaria (1925–1997) * Eugen Bacon, female African-Australian author * Eugen Beza (born 1978), Romanian football manager and former player * Eugen Bleuler (1857–1939), Swiss psychiatrist and eugenicist * Eugen von Böhm-Bawerk (1851–1914), Austrian economist * Eugen Bolz (1881–1945), German politician and member of the anti-Nazi resistance * Eugen Chirnoagă (1891–1965), Romanian chemist * Eugen Cicero (1940–1997), Romanian-German jazz pianist * Eugen Ciucă (1913–2005), Romanian-American artist * Eugen d'Albert (1864–1932), Scottish-born pianist and composer * Eugen Doga (born 1937), Romanian composer from Moldova * Eugen Drewermann (born 1940 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concentration
In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture. Several types of mathematical description can be distinguished: '' mass concentration'', ''molar concentration'', ''number concentration'', and ''volume concentration''. The concentration can refer to any kind of chemical mixture, but most frequently refers to solutes and solvents in solutions. The molar (amount) concentration has variants, such as normal concentration and osmotic concentration. Etymology The term concentration comes from the word concentrate, from the French , from con– + center, meaning “to put at the center”. Qualitative description Often in informal, non-technical language, concentration is described in a qualitative way, through the use of adjectives such as "dilute" for solutions of relatively low concentration and "concentrated" for solutions of relatively high concentration. To concentrate a solution, one must add more solute (for example, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charge Coupled Devices
A charge-coupled device (CCD) is an integrated circuit containing an array of linked, or coupled, capacitors. Under the control of an external circuit, each capacitor can transfer its electric charge to a neighboring capacitor. CCD sensors are a major technology used in digital imaging. In a CCD image sensor, pixels are represented by p-doped metal–oxide–semiconductor (MOS) capacitors. These MOS capacitors, the basic building blocks of a CCD, are biased above the threshold for inversion when image acquisition begins, allowing the conversion of incoming photons into electron charges at the semiconductor-oxide interface; the CCD is then used to read out these charges. Although CCDs are not the only technology to allow for light detection, CCD image sensors are widely used in professional, medical, and scientific applications where high-quality image data are required. In applications with less exacting quality demands, such as consumer and professional digital cameras, active ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
