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2-Methylbutane
Isopentane, also called methylbutane or 2-methylbutane, is a branched-chain saturated hydrocarbon (an alkane) with five carbon atoms, with formula or . Isopentane is a volatile and flammable liquid. It is one of three structural isomers with the molecular formula C5H12, the others being pentane (''n''-pentane) and neopentane (2,2-dimethylpropane). Isopentane is commonly used in conjunction with liquid nitrogen to achieve a liquid bath temperature of −160 °C. Natural gas typically contains 1% or less isopentane, but it is a significant component of natural gasoline.Ivan F. Avery, L. V. Harvey (1958): Natural-gasoline and Cycling Plants in the United States', Information circular, U.S. Department of the Interior, Bureau of Mines. 12 pages. History Although the mixture of pentanes was first isolated from the destructive distillation (pyrolysis) products of the boghead coal by Charles Greville Williams in 1862. In 1864–1865 two chemists tried to extract same hydrocarbon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Society Of Chemistry
The Royal Society of Chemistry (RSC) is a learned society and professional association in the United Kingdom with the goal of "advancing the chemistry, chemical sciences". It was formed in 1980 from the amalgamation of the Chemical Society, the Royal Institute of Chemistry, the Faraday Society, and the Society for Analytical Chemistry with a new Royal Charter and the dual role of learned society and professional body. At its inception, the Society had a combined membership of 49,000 in the world. The headquarters of the Society are at Burlington House, Piccadilly, London. It also has offices in Thomas Graham House in Cambridge (named after Thomas Graham (chemist), Thomas Graham, the first president of the Chemical Society) where ''RSC Publishing'' is based. The Society has offices in the United States, on the campuses of The University of Pennsylvania and Drexel University, at the University City Science Center in Philadelphia, Pennsylvania, in both Beijing and Shanghai, People' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Gasoline
Natural gasoline is a liquid hydrocarbon mixture condensed from natural gas, similar to common gasoline (petrol) derived from petroleum. The chemical composition of natural gasoline is mostly five- and six-carbon alkanes (pentanes and hexanes) with smaller amounts of alkanes with longer chains.Sheng Wang, Ying Zhang, Mao-Gang He, Xiong Zheng, and Li-Bin Chen (2014): "Thermal Diffusivity and Speed of Sound of Saturated Pentane from Light Scattering". ''International Journal of Thermophysics'', volume 35, pages 1450–1464. . Quote: "ethane 2.4% w/w, butane 1.3%, pentane 67.1%, hexane 22.0%, heptane 5.7%, and octane 1.5 %". It contains significant amounts of isopentane (methyl butane) , which is rare in the petroleum product.Ivan F. Avery, L. V. Harvey (1958): Natural-gasoline and Cycling Plants in the United States', Information circular, U.S. Department of the Interior, Bureau of Mines. 12 pages. Its boiling point is within the standard range for gasoline, and its vapor pressure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petroleum
Petroleum, also known as crude oil or simply oil, is a naturally occurring, yellowish-black liquid chemical mixture found in geological formations, consisting mainly of hydrocarbons. The term ''petroleum'' refers both to naturally occurring unprocessed crude oil, as well as to petroleum products that consist of refining, refined crude oil. Petroleum is a fossil fuel formed over millions of years from anaerobic decay of organic materials from buried prehistoric life, prehistoric organisms, particularly planktons and algae, and 70% of the world's oil deposits were formed during the Mesozoic. Conventional reserves of petroleum are primarily recovered by oil drilling, drilling, which is done after a study of the relevant structural geology, sedimentary basin analysis, analysis of the sedimentary basin, and reservoir characterization, characterization of the petroleum reservoir. There are also unconventional (oil & gas) reservoir, unconventional reserves such as oil sands and oil sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Histology
Histology, also known as microscopic anatomy or microanatomy, is the branch of biology that studies the microscopic anatomy of biological tissue (biology), tissues. Histology is the microscopic counterpart to gross anatomy, which looks at larger structures visible without a microscope. Although one may divide microscopic anatomy into ''organology'', the study of organs, ''histology'', the study of tissues, and ''cytology'', the study of cell (biology), cells, modern usage places all of these topics under the field of histology. In medicine, histopathology is the branch of histology that includes the microscopic identification and study of diseased tissue. In the field of paleontology, the term paleohistology refers to the histology of fossil organisms. Biological tissues Animal tissue classification There are four basic types of animal tissues: muscle tissue, nervous tissue, connective tissue, and epithelial tissue. All animal tissues are considered to be subtypes of these ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryosection
The frozen section procedure is a pathological laboratory procedure to perform rapid microscopic analysis of a specimen. It is used most often in oncological surgery. The technical name for this procedure is cryosection. The microtome device that cold cuts thin blocks of frozen tissue is called a cryotome. The quality of the slides produced by frozen section is of lower quality than formalin fixed paraffin embedded tissue processing. While diagnosis can be rendered in many cases, fixed tissue processing is preferred in many conditions for more accurate diagnosis. The intraoperative consultation is the name given to the whole intervention by the pathologist, which includes not only frozen section but also gross evaluation of the specimen, examination of cytology preparations taken on the specimen (e.g. touch imprints), and aliquoting of the specimen for special studies (e.g. molecular pathology techniques, flow cytometry). The report given by the pathologist is often limited to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tissue (biology)
In biology, tissue is an assembly of similar cells and their extracellular matrix from the same embryonic origin that together carry out a specific function. Tissues occupy a Biological organisation#Levels, biological organizational level between cell (biology), cells and a complete organ (biology), organ. Accordingly, organs are formed by the functional grouping together of multiple tissues. The English word "tissue" Morphological derivation, derives from the French word "", the past participle of the verb tisser, "to weave". The study of tissues is known as histology or, in connection with disease, as histopathology. Xavier Bichat is considered as the "Father of Histology". Plant histology is Studied Space Shuttle designs, studied in both plant anatomy and Plant physiology, physiology. The classical tools for studying tissues are the Microtome#Applications, paraffin block in which tissue is embedded and then sectioned, the staining, histological stain, and the Microscope, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dry Ice
Dry ice is the solid form of carbon dioxide. It is commonly used for temporary refrigeration as CO2 does not have a liquid state at normal atmospheric pressure and Sublimation (phase transition), sublimes directly from the solid state to the gas state. It is used primarily as a cooling agent, but is also used in fog machines at theatres for dramatic effects. Its advantages include lower temperature than that of Ice, water ice and not leaving any residue (other than incidental frost from moisture in the atmosphere). It is useful for preserving frozen foods (such as ice cream) where Refrigeration, mechanical cooling is unavailable. Dry ice sublimes at at Earth atmospheric pressure. This extreme cold makes the solid dangerous to handle without protection from frostbite injury. While generally not very toxic, the outgassing from it can cause hypercapnia (abnormally elevated carbon dioxide levels in the blood) due to a buildup in confined locations. Properties Dry ice is the soli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Union Of Pure And Applied Chemistry
The International Union of Pure and Applied Chemistry (IUPAC ) is an international federation of National Adhering Organizations working for the advancement of the chemical sciences, especially by developing nomenclature and terminology. It is a member of the International Science Council (ISC). IUPAC is registered in Zürich, Switzerland, and the administrative office, known as the "IUPAC Secretariat", is in Research Triangle Park, North Carolina, United States. IUPAC's executive director heads this administrative office, currently Greta Heydenrych. IUPAC was established in 1919 as the successor of the International Congress of Applied Chemistry for the advancement of chemistry. Its members, the National Adhering Organizations, can be national chemistry societies, national academies of sciences, or other bodies representing chemists. There are fifty-four National Adhering Organizations and three Associate National Adhering Organizations. IUPAC's Inter-divisional Committee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyrus Warren
Cyrus () is a Persian-language masculine given name. It is historically best known as the name of several Persian kings, most notably including Cyrus the Great, who founded the Achaemenid Empire in 550 BC. It remains widespread among Zoroastrians, particularly in India, and is also relatively common in the Anglophone world. Etymology Cyrus, as a word in English, is the Latinized form of the Greek Κῦρος, ''Kȳros'', from Old Persian ''Kūruš''. According to the inscriptions, the name is reflected in Elamite ''Kuraš'', Babylonian ''Ku(r)-raš/-ra-áš'' and Imperial Aramaic ''kwrš''. The modern Persian form of the name is '' Kūroš''. The etymology of Cyrus has been and continues to be a topic of discussion amongst historians, linguists, and scholars of Iranology. The Old Persian name "kuruš" has been interpreted in various forms such as "the Sun", "like Sun", "young", "hero," and "humiliator of the enemy in verbal contest" and the Elamite "kuraš" has been trans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Schorlemmer
Carl Schorlemmer FRS (30 September 1834 – 27 June 1892) was a German chemist who did research on hydrocarbons and contributed to the study of the history of chemistry. Early life and education Schorlemmer was born in 1834, the son of a joiner in Darmstadt. He was able to visit Realschule and later — against the will of his poor father — trade school. Schorlemmer started his training to become a pharmacist in 1853 in Groß-Umstadt. During his training he made own chemical experiments in the laboratory and was interested in astronomy and botany. After two and a half years he passed his exam, became an assistant pharmacist and worked in the Schwanen pharmacy in Heidelberg. Having attended some lectures of Robert Wilhelm Bunsen, he studied pharmacy and chemistry in Heidelberg and in Gießen (where he attended lectures of Heinrich Will and Hermann Franz Moritz Kopp, a historian of chemistry). He later became demonstrator at Owens College in Manchester with Henry Enfield Ros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Oil Rush
The oil rush in America started in Titusville, Pennsylvania, in the Oil Creek Valley when Edwin L. Drake struck "rock oil" there in 1859. Titusville and other towns on the shores of Oil Creek expanded rapidly as oil wells and refineries shot up across the region. Oil quickly became one of the most valuable commodities in the United States and railroads expanded into Western Pennsylvania to ship petroleum to the rest of the country. By the mid-1870s, the oil industry was well established, and the "rush" to drill wells and control production was over. Pennsylvania oil production peaked in 1891 and was later surpassed by western states such as Texas and California, but some oil industry remains in Pennsylvania. Pre-rush history Pre-Pennsylvania Rock Oil Company Before petroleum was used as a fuel, oil had many uses. In Pennsylvania, the Native American tribes had been using oil from seeps for several centuries. Early European explorers discovered evidence of troughs dug alongs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Greville Williams
Charles H. Greville Williams (22 September 1829 – 15 June 1910), was an English scientist and analytical chemist who published many scientific papers from 1853. He was born in Cheltenham, Gloucestershire. He died in Horley and is buried in Streatham. Professional life He was elected as a Fellow of The Royal Society in 1862. Throughout the later 19th century, many chemists attempted to determine the makeup of natural rubber, with the goal of reproducing it. In 1860, Williams analyzed rubber by destructive distillation and obtained a large quantity of a light oil which he termed isoprene (polymer of the monomer isoprene—formula CH2:C(CH3)CH:CH2). Many efforts were made during the next 70 years to synthesize rubber in the laboratory by using isoprene as the monomer, but these did not bear fruit until Samuel Horne succeeded in 1955. In 1868, he established the Brentford dyestuff works Williams, Thomas and Dower in New York City. The firm was liquidated in 1878 and in 1879 hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
