Tetragonolepis is an extinct genus of bony fish belonging to the Semionotiformes family Semionotidae.

Tetralinylamine

Tetrahedron-dodecahedron honeycomb

Tetramorium parasiticum is a species of ant in the genus Tetramorium. It is endemic to South Africa.

Tetrahydrocannabinal

Tetrahedral numbers

Tetrameric cation channel

Tetraneura yezoensis

Tetrahectagon

*Wasmannia auropunctata brevispinosa (Borgmeier, 1928)

Tetrameranthus globuliferus

Tetragonoderus fimbriatus is a species of beetle in the family Carabidae. It was described by Bates in 1886.

Tetragonoderus sticticus is a species of beetle in the family Carabidae. It was described by Erichson in 1847.

Tetramolopium rockii is a rare species of flowering plant in the aster family known by the common name dune tetramolopium. It is endemic to Hawaii, where it is known only from the island of Molokai. It is threatened by habitat destruction and degradation caused by deer, cattle, introduced species of plants, and off road vehicles. It is a federally listed threatened of the United States.This plant is a small, mat-forming shrub growing no more than about 10 centimeters tall. The inflorescence contains a single flower head. The plant grows in shrublands on sand dunes. It is present only on a six-kilometer strip of habitat on the Molokai coastline.

Tetragonoderus tesselatus is a species of beetle in the family Carabidae. It was described by Chaudoir in 1876.

Tetranodus xanthocollis is a species of beetle in the family Cerambycidae. It was described by Chemsak in 1977.

tetraiodide may refer to:Carbon tetraiodide, CI4Diphosphorus tetraiodide, P2I4, an orange crystalline solid and a versatile reducing agentSilicon tetraiodide, SiI4Tellurium tetraiodide, TeI4Titanium tetraiodide, TiI4

Tetraneuris dodgei

Tetrahedron Provincial Park

Tetramorium hungaricum

Tetragramma variolare

A tetrahydrate is a molecule surrounded by four (4) molecules of water, forming a hydrate. The notation for a tetrahydrate is anhydrous molecule's formula·4H2O, where the 4 represents tetrahydrate, and the H2O represents the tetrahydrate. And the molecule's name changes to anhydrous molecule's name tetrahydrate.

Tetrahedra

Tetragonoderus subfasciatus is a species of beetle in the family Carabidae. It was described by Putzeys in 1846.

Tetrakis(pyridine)silver(II) peroxydisulfate

Tetrahydro-2-furoic acid is a low melting solid or high boiling liquid, depending on temperature. Tetrahydro-2-furoic acid is a useful pharmaceutical intermediate and is used in the process to several drugs, including Terazosin for the treatment of prostate enlargement and hypertension.

Tetrandromyces

Tetragonoderus rhombophorus is a species of beetle in the family Carabidae. It was described by Schmidt-Goebel in 1846.

Tetraiodobenzenes form a group of substances consisting of a benzene ring with four iodine atoms (-I) as substituents (C6H2I4). By their different arrangement, three constitutional isomers are possible.

Tetragonoceras

Tetralonia commixtana, also known as Tetralonia (Thygatina) commixtana, is a species of bees belonging to the family Apidae subfamily Apinae. It is found endemic to Sri Lanka.

Tetramethylazanium

Tetramicra canaliculata is a species of orchids in the subtribe Laeliinae. It is found in Florida, Hispaniola, Puerto Rico, Trinidad and the Lesser Antilles. It is the type species of its genus.

Tetrahydrobiopterin deficiency (THBD, BH4D), also called THB or BH4 deficiency, is a rare metabolic disorder that increases the blood levels of phenylalanine. Phenylalanine is an amino acid obtained through the diet. It is found in all proteins and in some artificial sweeteners. If tetrahydrobiopterin deficiency is not treated, excess phenylalanine can build up to harmful levels in the body, causing intellectual disability and other serious health problems.High levels of phenylalanine are present from infancy in people with untreated tetrahydrobiopterin (THB, BH4) deficiency. The resulting signs and symptoms range from mild to severe. Mild complications may include temporary low muscle tone. Severe complications include intellectual disability, movement disorders, difficulty swallowing, seizures, behavioral problems, progressive problems with development, and an inability to control body temperature.It was first characterized in 1975.

Tetragonoderus mexicanus is a species of beetle in the family Carabidae. It was described by Chaudoir in 1876.

Tetragonoderus leleupi is a species of beetle in the family Carabidae. It was described by Basilewsky in 1956.

Tetraith

Tetragonoderus columbicus

Tetraibidion aurivillii

Tetramolopium capillare is a rare species of flowering plant in the aster family known by the common name pamakani. It is endemic to Hawaii, where it is known only from the island of Maui. There are four occurrences for a total of fewer than 200 individuals. It is threatened by the degradation of its habitat caused by introduced plant species.

Tetrahydroxypapaveroline

Tetramorium simillimum

Tetralonia commixtana

Tetragonoderus chalceus is a species of beetle in the family Carabidae. It was described by Chaudoir in 1876.

Tetrahydroxyflavanone

Tetrahydrocannabinolic acid synthase

Tetragonoderus kuntzeni is a species of beetle in the family Carabidae. It was described by Burgeon in 1936.

Tetranitrogen

Tetrahydrodimethyldicyclopentadiene

Tetragonoderus columbicus is a species of beetle in the family Carabidae. It was described by Steinheil in 1875.

Tetrahedral Graph

tetramethylammonium hydroxide; N,N,N,-trimethylmethanaminium hydroxide

Tetramorium simillimum, is a species of ant in the subfamily Myrmicinae. It is a small pale colored widespread species that can be found in almost all the continents.

Tetrakentron

Tetraiodobenzenes

Tetragonoderus omophronides

Tetragonoderus nagatomii is a species of beetle in the family Carabidae. It was described by Jedlicka in 1966.

Tetrameles nudiflora

Tetrahydrochrysene

Tetralofo (Greek: Τετράλοφο) is a village and a community of the Kozani municipality. Before the 2011 local government reform it was part of the municipality of Ellispontos, of which it was a municipal district. The 2011 census recorded 320 inhabitants in the community. The community of Tetralofo covers an area of 25.199 km2.

*Tetramorium simillimum insulare (Santschi, 1928)

Tetralopha clemensalis

Tetraneuris mancosensis

Tetramethylammonium (TMA) or (Me4N+) is the simplest quaternary ammonium cation consisting of four methyl groups attached to a central nitrogen atom, and is isoelectronic with neopentane. It is positively charged and must exist in association with a counter-ion, and is most commonly found in simple salts such as tetramethylammonium chloride, tetramethylammonium bromide, tetramethylammonium iodide and tetramethylammonium hydroxide, and can also form the unusual auride. Tetramethylammonium salts are used in chemical synthesis and are widely employed in pharmacological research. They also occur as toxic natural products, although the counterions may be difficult to identify. The identity of the anion associated with the tetramethylammonium cation frequently has little or no bearing on a particular chemical or biological type of action, but this is not invariably so.

Tetragonoderus insignicollis is a species of beetle in the family Carabidae. It was described by Chaudoir in 1878.

Tetramorium mayri is a species of ant in the genus Tetramorium. It is endemic to India.

Tetramisole

* Tetraneura heterohirsuta (Carver & Basu, 1961)

tetramethylazanium hydroxide

2,3,5,6-tetrahydroxycyclohexa-2,5-diene-1,4-dione

Tetragonophthalma is a genus of spiders in the Pisauridae family. It was first described in 1878 by Karsch. As of 2017, it contains only one species, Tetragonophthalma vulpina, found in west and central Africa.

Tetragonoderus pictus

Tetragonoderus chalceus

Tetrameraden meringos

Tetramesityldiiron is an organoiron compound with the formula Fe2(C6H2(CH3)3)4. It is a red, air-sensitive solid that is used as a precursor to other iron complexes. It adopts a centrosymmetric structure. The complex is a Lewis acid, forming monomeric adducts, e.g. Fe(C6H2(CH3)3)2pyridine2. The complex is prepared by treating ferrous halides with the Grignard reagent formed from mesityl bromide:2 FeCl2 + 4 BrMgC6H2(CH3)3 → Fe2(C6H2(CH3)3)4 + 2 MgBr2

Tetragonosaurus

Tetrakis(pyridine)silver(II) peroxydisulfate is a chemical compound which contains silver in the rare oxidation state of +2.

Tetragonoderus swahilius

Tetrahydrobiopterin deficiency

Tetragonoderus quadrimaculatus is a species of beetle in the family Carabidae. It was described by Gory in 1833.

Tetragonoderus sinuosus is a species of beetle in the family Carabidae. It was described by Chaudoir in 1876.

Tetragonoderus linealis is a species of beetle in the family Carabidae. It was described by Andrewes in 1938.

Tetragonoderus foveicollis is a species of beetle in the family Carabidae. It was described by Liebke in 1951.

Tetraminx

Tetragonoderus rhombophorus

Tetragonoderus notaphioides is a species of beetle in the family Carabidae. It was described by Motschulsky in 1861.

Tetrahedrane

In enzymology, a tetrahydroxynaphthalene reductase (EC 1.1.1.252) is an enzyme that catalyzes the chemical reactionscytalone + NADP+ ⇌ {\displaystyle \rightleftharpoons } 1,3,6,8-tetrahydroxynaphthalene + NADPH + H+Thus, the two substrates of this enzyme are scytalone and NADP+, whereas its 3 products are 1,3,6,8-tetrahydroxynaphthalene, NADPH, and H+.This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is scytalone:NADP+ Delta5-oxidoreductase.

Tetragonoderus notaphioides

Tetralophodon

Tetramethoxyamphetamine

Tetramethylammonium pentafluoridoxenonate(−)

Tetrahedron is a weekly peer-reviewed scientific journal covering the field of organic chemistry. According to the Journal Citation Reports, the journal has a 2014 impact factor of 2.641.Tetrahedron and Elsevier, its publisher, support an annual symposium. In 2010, complaints were raised over its high subscription cost.

Tetramorium bicarinatum, is a species of ant of the family Formicidae in the order Hymenoptera that originated in South East Asia.

Tetramethyl succinonitrile

Tetragonoderus interruptus is a species of beetle in the family Carabidae. It was described by Dejean in 1829.

Tetraneuris angustifolia

Tetraneuris linearis

Tetragonoderus interruptus

Tetragonoderus sericatus is a species of beetle in the family Carabidae. It was described by Dejean in 1829.

This page provides supplementary chemical data on tetrahydrofuran.

Tetrahedron 5-compound

Tetrahedron Peak is a mountain in British Columbia, Canada. The highest peak on the Sunshine Coast, it rises to an elevation of 1,739 meters (5,705 ft), with a prominence of 1,164 meters (3,819 ft). It is located in the Tetrahedron Provincial Park.

*Tetramorium simillimum denticulatum (Forel, 1902)

Tetramethylammonium pentafluoroxenate is the chemical compound with the formula N(CH3)4XeF5. The XeF−5 ion it contains was the first example of a planar pentagonal AX5E2 species. It was prepared by the reaction of N(CH3)4F with xenon tetrafluoride, N(CH3)4F being chosen because it can be prepared in anhydrous form and is readily soluble in organic solvents. The anion is planar, with the fluorine atoms in a slightly distorted pentagonal coordination (Xe–F bond lengths 197.9–203.4 pm, and F–X–F bond angles 71.5–72.3°). Other salts have been prepared with sodium, caesium and rubidium, and vibrational spectra shows that these contain the same planar ion. The isolated anion has the unusual point group of D5d.

Tetragonurid

Tetralin (1,2,3,4-tetrahydronaphthalene) is a hydrocarbon having the chemical formula C10H12. This molecule is similar to the naphthalene chemical structure except that one ring is saturated.

Tetramicra canaliculata

Tetralophodon ("four-ridged tooth") is an extinct elephantoid genus belonging to the family Anancidae.

Tetrahydroharman(e), also known as 1-methyl-1,2,3,4-tetrahydro-β-carboline, is a general name for one of two isomers:(1S)-1-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indoleCalligonine ((1R)-1-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole)Calligonine is a major alkaloid constituent of the roots of Calligonum minimum and the bark of Elaeagnus angustifolia. When taken internally, it has the effect of substantially lowering blood pressure for an extended period of time, similar to reserpine.

Tetragonoderus swahilius is a species of beetle in the family Carabidae. It was described by Alluaud in 1931.

Tetrahydro-2-furanylmethyl acetate

Tetragrammaton in the New Testament

Tetragonoderus elegans is a species of beetle in the family Carabidae. It was described by Andrewes in 1931.

Tetramorium transversarium, is a species of ant in the subfamily Myrmicinae. It is found in Sri Lanka.

Tetragonolepis

Tetrahydroxyquinone

Tetramorium mayri

Tetrahydrofuranylfentanyl is an opioid analgesic that is an analog of fentanyl and has been sold online as a designer drug, first appearing in Europe in late 2016.

Tetragonoderus sericatus

Tetramethyl ammonium chloride

Tetramethoxymethane is a chemical compound which is formally formed by complete methylation of the hypothetical orthocarbonic acid C(OH)4 (orthocarboxylic acid violates the Erlenmeyer rule and is unstable in free state).

Tetrahedral carbonyl addition compound

Tetragonoderus variegatus is a species of beetle in the family Carabidae. It was described by Dejean in 1829.

Tetramicra may refer to:Tetramicra (plant), a genus of flowering plants in the family OrchidaceaeTetramicra (microsporidian), a fungus genus in the division Microsporidia

Tetrahedron Provincial Park is a provincial park in British Columbia, Canada, located northeast of Sechelt in the Sunshine Coast area of the province. The park was created in 1995. Its highest point is Tetrahedron Peak, at 1727 meters. It also contains Panther Peak (1681 meters), and Mt. Steele (1651 meters)

Tetrahedron Computer Methodology

Tetramethylsilane and Trimethylsilyl group

Tetramoera is a genus of moths belonging to the subfamily Olethreutinae of the family Tortricidae.

Tetramorium transversarium

Tetragonoderus bastardi is a species of beetle in the family Carabidae. It was described by Alluaud in 1897.

Tetranodus tropipennis is a species of beetle in the family Cerambycidae. It was described by Chemsak in 1977.

Tetragonoderus sticticus

Tetramerium

Tetramine

Tetragonoceras is an extinct prehistoric nautiloid genus from the nautilid family Tetragonoceratidae that lived during the Middle Devonian, found in Canada.Tetragonoceras has an openly spiralled, gyroconic shell with an almost square cross section, but with the venter on the outer rim broader than the dorsum on the inner. The sides are flattish and converge slightly on the dorsum and the ventro-lateral shoulders are angular.

Tetragonus lycaenoides is a moth of the family Callidulidae. It is found in Sulawesi, Borneo, Peninsular Malaysia, Sumatra and Nias.

Tetramethylsuccinic anhydride

Tetrahydroxy-1,4-benzoquinone, also called tetrahydroxy-p-benzoquinone, tetrahydroxybenzoquinone, or tetrahydroxyquinone (THBQ, THQ), is an organic compound with formula C6O2(OH)4. Its molecular structure consists of a cyclohexadiene ring with four hydroxyl groups and two ketone groups in opposite (para) positions.The compound gives a light red solution in water, and crystallizes as the glistening bluish-black (but non-conducting) dihydrate C6O2(OH)4·2H2O.The compound can be synthesized from glyoxal or from myo-inositol (phytic acid), a natural compound widely present in plants. THBQ forms an adduct with 4,4'-bipyridine in the 2:3 ratio.

Tetrahydrourushiol

benzocyclohexane

Tetrahedral kites

Tetraliidae

Methtryptoline

Tetragonus lycaenoides

Tetrahymena thermophila

In geometry, the tetrahemihexahedron or hemicuboctahedron is a uniform star polyhedron, indexed as U4. It has six vertices, 12 edges, and seven faces: four triangular and three square. Its vertex figure is a crossed quadrilateral. Its Coxeter–Dynkin diagram is (although this is a double covering of the tetrahemihexahedron).It is the only non-prismatic uniform polyhedron with an odd number of faces. Its Wythoff symbol is 3/2 3 | 2, but that represents a double covering of the tetrahemihexahedron with eight triangles and six squares, paired and coinciding in space. (It can more intuitively be seen as two coinciding tetrahemihexahedra.)It is a hemipolyhedron. The "hemi" part of the name means some of the faces form a group with half as many members as some regular polyhedron—here, three square faces form a group with half as many faces as the regular hexahedron, better known as the cube—hence hemihexahedron. Hemi faces are also oriented in the same direction as the regular polyhedron's faces. The three square faces of the tetrahemihexahedron are, like the three facial orientations of the cube, mutually perpendicular.The "half-as-many" characteristic also means that hemi faces must pass through the center of the polyhedron, where they all intersect each other. Visually, each square is divided into four right triangles, with two visible from each side.It is the three-dimensional demicross polytope.

Tetramethyluric acid may refer to:Methylliberine (O2,1,7,9-tetramethyluric acid)Theacrine (1,3,7,9-tetramethyluric acid)

Tetragonoderus poecilus is a species of beetle in the family Carabidae. It was described by Bates in 1883.

emerg

Tetrahydridoborate(III)

Tetramethrine

Tetramethylcyclopropylfentanyl is an opioid analgesic that is an analog of fentanyl and has been sold as a designer drug.

Tetragonoderus femoralis is a species of beetle in the family Carabidae. It was described by Chaudoir in 1876.

Tetragonoderus omophronides is a species of beetle in the family Carabidae. It was described by Chaudoir in 1876.

Tetraliidae is a family of crabs.

Tetraneuris brandegei

Tetrahydroharman

Tetraloops are a type of four-base hairpin loop motifs in RNA secondary structure that cap many double helices. There are many variants of the tetraloop. The published ones include ANYA, CUYG, GNRA, UMAC and UNCG.Three types of tetraloops are common in ribosomal RNA: GNRA, UNCG and CUUG, in which the N could be either uracil, adenine, cytosine, or guanine, and the R is either guanine or adenine. These three sequences form stable and conserved tetraloops that play an important role in structural stability and biological function of 16S rRNA.GNRAThe GNRA tetraloop has a guanine-adenine base-pair where the guanine is 5' to the helix and the adenine is 3' to the helix. Tetraloops with the sequence UMAC have essentially the same backbone fold as the GNRA tetraloop, but may be less likely to form tetraloop-receptor interactions. They may therefore be a better choice for closing stems when designing artificial RNAs.The presence of the GNRA tetraloop provides an exceptional stability to RNA structure. GNRA occurs 50% more than other tetranucleotides due to their ability to withstand temperatures 4° C higher than other RNA hairpins. This allows them to act as nucleation sites for proper folding of RNA. The rare hydrogen bonds between the first guanine and fourth adenine nucleotide, extensive stacking of nucleotide bases and hydrogen bonds between 2' OH of a ribose sugar and nitrogenous bases makes the tetraloop thermodynamically stable.UNCGIn the UNCG is favorable thermodynamically and structurally due to hydrogen bonding. van der Waals interactions, coulombic interactions and the interactions between the RNA and the solvent. The UNCG tetraloops are more stable than DNA loops with the same sequence. The UUCG tetraloop is the most stable tetraloop. UUCG and GNRA tetraloops make up 70% of all tetraloops in 16S-RNA .CUUGThe CUUG tetraloop has the highest likelihood of conformational changes due to its structural flexibility. Out of the three tetraloops mentioned, this tetraloop is the most flexible since the second uracil is comparatively unrestricted. It is also very thermodynamically stable.

Tetramethylenediamine

Tetraneuris ivesiana is a North American species of plants in the sunflower family, known by the common name Ives' fournerved daisy. It grows in the southwestern United States, in Arizona, New Mexico, Utah, Colorado.Tetraneuris ivesiana is a perennial herb up to 26 cm (10 in) tall. It forms a branching underground caudex sometimes producing as many as 30 above-ground stems. One plant can produce as many as 30 flower heads. Each head has 7-10 yellow ray flowers surrounding 40-150 yellow disc flowers.

Tetralin

Tetrahemihexacron

1,2,3,4-tetrahydronaphthalene

Tetrahydrochrysene (THC) may refer to:(R,R)-Tetrahydrochrysene ((R,R)-THC)(S,S)-Tetrahydrochrysene ((S,S)-THC)

Tetraiodide

Tetragrammaton Labyrinth (Japanese: 断罪者〜Tetragrammaton Labyrinth〜, Hepburn: Danzaisha Tetragrammaton Labyrinth) is a Japanese manga series written and illustrated by Ei Itou. The manga was serialized in the Japanese seinen manga magazine Comic Gum between January 26, 2005 and November 26, 2007, published by Wani Books. The manga has been licensed by Los Angeles-based company Seven Seas Entertainment for distribution in the English language. The first English-bound volume was released on June 30, 2007 with the second and third being released on November 28, 2007 and July 8, 2008, respectively. The fourth volume was released in December 2008.

Tetrahydro-3-furanol

Tetrahydrobiopterin (BH4, THB), also known as sapropterin, is a naturally occurring essential cofactor of the three aromatic amino acid hydroxylase enzymes, used in the degradation of amino acid phenylalanine and in the biosynthesis of the neurotransmitters serotonin (5-hydroxytryptamine, 5-HT), melatonin, dopamine, norepinephrine (noradrenaline), epinephrine (adrenaline), and is a cofactor for the production of nitric oxide (NO) by the nitric oxide synthases. Chemically, its structure is that of a reduced pteridine derivative.

Tetramethylbenzidine

Tetraloop

Tetramolopium rockii

Tetrahalomethane

dimesityliron

Tetrahydro-2-furancarboxylic acid

Tetrahedron Peak

Tetramerous

Tetralophodon longirostris

Tetrahydroxybenzoquinone

Tetrahydropteroyl-gamma-polyglutamate:L-glutamate gamma-ligase (ADP-forming)

Tetrahydromethanopterin (THMPT, H4MPT) is a coenzyme in methanogenesis. It is the carrier of the C1 group as it is reduced to the methyl level, before transferring to the coenzyme M.Tetrahydrosarcinapterin (THSPT, H4SPT) is a modified form of THMPT, wherein a glutamyl group linked to the 2-hydroxyglutaric acid terminus.

Tetramine is a typical name for a chemical containing four amine groups. Some examples are:Triethylenetetramine ("trien")Hexamethylenetetramine (hexamine)Tetramethylenedisulfotetramine (TETS), a rodenticide banned in most countriesTetramine is also used as a synonym for the tetramethylammonium cation.

Tetramethylammonium

Tetramethylammonium hydroxide (TMAH or TMAOH) is a quaternary ammonium salt with the molecular formula N(CH3)4+ OH−. It is commonly encountered as concentrated solutions in water or methanol. The solid and solutions are colorless, or yellowish if impure. Although TMAH has virtually no odor when pure, samples often have a strongly fishy smell from the trimethylamine which is a common impurity. TMAH has numerous and diverse industrial and research applications.

Tetrahertz

Tetrahedrite is a copper antimony sulfosalt mineral with formula: (Cu,Fe)12Sb4S13. It is the antimony endmember of the continuous solid solution series with arsenic-bearing tennantite. Pure endmembers of the series are seldom if ever seen in nature. Of the two, the antimony rich phase is more common. Other elements also substitute in the structure, most notably iron and zinc, along with less common silver, mercury and lead.

Tetramethylene dicyanide

Tetrahydrobiopterin deficiency (THBD, BH4D), also called THB or BH4 deficiency, is a rare metabolic disorder that increases the blood levels of phenylalanine. Phenylalanine is an amino acid obtained through the diet. It is found in all proteins and in some artificial sweeteners.

Tetramorium inquilinum is an ectoparasitic ant found in Europe. It was discovered by Swiss myrmecologist Heinrich Kutter. The species is unusual for lacking a worker caste, the queens and males living entirely off the care of the pavement ant.

naphthalene 1,2,3,4-tetrahydride

Tetragrammaton in the new testament

Tetrahydropalmatine

Tetragraptus

Τετράλοφο

Tetramoera schistaceana, the grey borer of sugar cane, is a moth of the Tortricidae family. It is found in Indonesia (Java), China (Guangdong), Taiwan, Malaysia, the Philippines, Mauritius, Hawaii, Madagascar and Réunion.The wingspan is 14–18 mm.The larvae feed on Saccharum dulce. The larvae make irregular short tunnels in the stem, usually near the surface and preferably in young hosts.

Tetrahedron 4-compound

Tetrahydrofurfuryl acetate is an organic chemical compound used for food flavouring and cosmetics. It has a fruity ethereal flavour, also described as honey, maple, or bread-like. It is generally accepted as safe in the USA. Typical levels of use are 2 ppm in drinks, 8 ppm in icecream, and 20 ppm in baked products and confectionery.Chemically, it is a heterocyclic ester.

Tetragonoderus fimbriatus

Tetraneura yezoensis, also known as Tetraneura (Tetraneura) yezoensis, is an aphid in the superfamily Aphidoidea in the order Hemiptera. It is a true bug and sucks sap from plants.

3α,5α-Tetrahydrocorticosterone; 5β-Pregnane-3α,11β,21-triol-20-one

Tetranesodon conorhynchus

Tetramorium bicarinatum

Tetramethylammonium pentafluoroxenate

Tetragonoderus nagatomii

Tetragonolobus

Tetrameles

Elaeagnine

Tetrahydropalmatine (THP) is an isoquinoline alkaloid found in several different plant species, mainly in the genus Corydalis (Yan Hu Suo), but also in other plants such as Stephania rotunda. These plants have traditional uses in Chinese herbal medicine. The pharmaceutical industry has synthetically produced the more potent enantiomer Levo-tetrahydropalmatine (Levo-THP), which has been marketed worldwide under different brand names as an alternative to anxiolytic and sedative drugs of the benzodiazepine group and analgesics such as opiates. It is also sold as a dietary supplement.

Tetranitrogen is a neutrally charged polynitrogen allotrope of the chemical formula N4 and consists of four nitrogen atoms. The tetranitrogen cation is the positively charged ion, N+4, which is more stable than the neutral tetranitrogen and is thus more studied. The structure, stability and properties of these molecules have been of great interest to research scientists in the last ten years.

Tetramethylammonium auride

This page provides supplementary chemical data on tetramethylethylenediamine.

Tetrameristaceae is a family of flowering plants. The family consists of five species, of trees or shrubs, in three genera:Pelliciera in Central and South AmericaPentamerista in the GuyanasTetramerista in Southeast AsiaThe APG II system places this family in the order Ericales, of the asterids.In the APG III system, the genus Pelliciera, previously treated as its own family, Pellicieraceae, is included in Tetrameristaceae.

Tetramicra (genus)

Tetrakishexahedron

Tetrakis(dimethylamido)-titanium(IV)

Tetragrammic cross

Oxolan-2-ylmethyl acetate

Tetrahedral-octahedral honeycomb

Tetramethylformamidine

Tetraneuris incana

Tetraneuris ivesiana

Tetragonoderus undatus

The tetrahedral-octahedral honeycomb, alternated cubic honeycomb is a quasiregular space-filling tessellation (or honeycomb) in Euclidean 3-space. It is composed of alternating octahedra and tetrahedra in a ratio of 1:2.Other names include half cubic honeycomb, half cubic cellulation, or tetragonal disphenoidal cellulation. John Horton Conway calls this honeycomb a tetroctahedrille, and its dual a dodecahedrille.It is vertex-transitive with 8 tetrahedra and 6 octahedra around each vertex.

Tetragonoderus bastardi

*Tetramorium pusillum exoleta (Santschi, 1914)

Tetrakis(pyridine)silver(II) persulfate, Tetrakis(pyridine)silver(II) peroxodisulfate

Tetroquinone

Tetragonoderus tesselatus

Tetramoera

Tetralene

Tetrahedron Comput. Methodol.

Tetrahydrofurfuryl acetate is an organic chemical compound used for food flavouring and cosmetics. It has a fruity ethereal flavour, also described as honey, maple, or bread-like. It is generally accepted as safe in the USA. Typical levels of use are 2 ppm in drinks, 8 ppm in icecream, and 20 ppm in baked products and confectionery.Chemically, it is a heterocyclic ester. It is made by reacting tetrahydrofurfuryl alcohol with acetic anhydride.Related flavouring compounds are tetrahydrofurfuryl butyrate, tetrahydrofurfuryl cinnamate, tetrahydrofurfuryl alcohol, and tetrahydrofurfuryl propionate.

Tetranodus tropipennis

Tetragonoderus femoralis

Tetrahedron (journal)

Tetrahedron-cube honeycomb

Tetramicra

Tetramoera schistaceana

Tetramesityldiiron

*Grapholitha schistaceana (Snellen, 1891)

Tetramethylthiuram disulfide

Tetrahedron number

Tetrameranthus globuliferus is a species of plant in the Annonaceae family. It is endemic to Ecuador. Its natural habitat is subtropical or tropical moist lowland forests.

Tetrahydrobiopterin Deficiency

A tetrahedral intermediate is a reaction intermediate in which the bond arrangement around an initially double-bonded carbon atom has been transformed from trigonal to tetrahedral. Tetrahedral intermediates result from nucleophilic addition to a carbonyl group. The stability of tetrahedral intermediate depends on the ability of the groups attached to the new tetrahedral carbon atom to leave with the negative charge. Tetrahedral intermediates are very significant in organic syntheses and biological systems as a key intermediate in esterification, transesterification, ester hydrolysis, formation and hydrolysis of amides and peptides, hydride reductions, and other chemical reactions.

Tetragonus

Tetramorium parasiticum

Tetrahedrally truncated dodecahedron

Tetrahedral hyperprism

N,N,N-Trimethylmethanaminium

Tetragonoderus linealis

Tetrakis-(mu-acetato)dirhodium

Tetrahydrocorticosterone

Tetragonula is a genus of stingless bees. In 1961, Brazilian bee expert, Professor J.S. Moure, first proposed the genus name Tetragonula to improve the classification system by dividing the large genus Trigona stingless bees 9 smaller groups. About 30 stingless bee species formerly placed in the genus Trigona are now placed in the genus Tetragonula.

Tetrahedrite

Tetralite

Tetramicra elegans

Tetranacci numbers

Tetraneuris stenophylla

Tetragonus is a genus of moths of the Callidulidae family.

Tetrahydroxynaphthalene reductase

Tetramery (botany)

Tetrameles (genus)

Tetrahydroimidazole

Tetragonoschema

Tetralofo

Tetragonoschema is a genus of beetles in the family Buprestidae, the jewel beetles.

Tetrakis(triphenylphosphine) palladium(0)

3α,5α-Tetrahydrocorticosterone (3α,5α-THB), or simply tetrahydrocorticosterone (THB or THCC), is an endogenous glucocorticoid hormone.

Tetragram (disambiguation)

Tetramorium inquilinum

Bacticin

Tetragonoderus sinuosus

Tetrahydrocannabinolic acid (THCA) synthase (full name Δ1-tetrahydrocannabinolic acid synthase) is an enzyme responsible for catalyzing the formation of THCA from cannabigerolic acid (CBGA). THCA is the direct precursor of tetrahydrocannabinol (THC), the principal psychoactive component of cannabis, which is produced from various strains of Cannibis sativa. Therefore, THCA synthase is considered to be a key enzyme controlling cannabis psychoactivity.

Tetralogy of Fallot (TOF) is a type of heart defect present at birth. Symptoms include episodes of bluish color to the skin. When affected babies cry or have a bowel movement, they may develop a "tet spell" where they turn very blue, have difficulty breathing, become limp, and occasionally lose consciousness. Other symptoms may include a heart murmur, finger clubbing, and easy tiring upon breastfeeding.The cause is typically not known.

*Tetramorium simillimum opacior (Forel, 1913)

Tetramethylammonium (TMA) or (Me4N+) is the simplest quaternary ammonium cation consisting of four methyl groups attached to a central nitrogen atom, and is isoelectronic with neopentane. It is positively charged and must exist in association with a counter-ion, and is most commonly found in simple salts such as tetramethylammonium chloride, tetramethylammonium bromide, tetramethylammonium iodide and tetramethylammonium hydroxide, and can also form the unusual auride.

Tetrahydrocannabinol-C4, also known as THC-C4 and butyl-THC, is a homologue of tetrahydrocannabinol (THC), the active component of cannabis. They are only different by the pentyl side chain being replaced by a butyl side chain. It is unknown whether THC-C4 is an agonist, partial agonist, or antagonist at the cannabinoid receptors. The propyl analog, THCV, is a cannabinoid receptor type 1 and cannabinoid receptor type 2 antagonist, while THC is a CB1 agonist.

1-Methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole

Tetraneuris ivesiana is a North American species of plants in the sunflower family, known by the common name Ives' fournerved daisy. It grows in the southwestern United States, in Arizona, New Mexico, Utah, Colorado.Tetraneuris ivesiana is a perennial herb up to 26 cm (10 in) tall. It forms a branching underground caudex sometimes producing as many as 30 above-ground stems. One plant can produce as many as 30 flower heads.

Irregular heart rate,pulmonary regurgitation

Tetram

Tetragonoschema is a genus of beetles in the family Buprestidae, the jewel beetles. There are 17 species in the genus, which is distributed throughout the Americas from Mexico to Patagonia.Species include:Tetragonoschema aeneum Kerremans, 1899Tetragonoschema albopilosum Hoscheck, 1931Tetragonoschema alvarengai Cobos, 1972Tetragonoschema argentiniense (Obenberger, 1915)Tetragonoschema brasiliae Obenberger, 1922Tetragonoschema brasiliense (Kerremans, 1897)Tetragonoschema caerulans Théry, 1944Tetragonoschema crassum Théry, 1944Tetragonoschema cupreocingulatum Hoscheck, 1931Tetragonoschema darlingtoni Théry, 1944Tetragonoschema fallaciosum Théry, 1944Tetragonoschema fossicolle Kerremans, 1900Tetragonoschema grouvellei Théry, 1944Tetragonoschema humerale Waterhouse, 1882Tetragonoschema latum Théry, 1944Tetragonoschema medium Obenberger, 1922Tetragonoschema missionarium Obenberger, 1947Tetragonoschema nanum Obenberger, 1922Tetragonoschema opacicolle Théry, 1944Tetragonoschema patagonicum Obenberger, 1922Tetragonoschema pujoli Théry, 1944Tetragonoschema purpurascens Kerremans, 1897Tetragonoschema pygmaeum Théry, 1944Tetragonoschema quadratum (Buquet, 1841)Tetragonoschema rubromarginatum Théry, 1944Tetragonoschema santafeanum Obenberger, 1947Tetragonoschema strandi Obenberger, 1924Tetragonoschema sulci Obenberger, 1932Tetragonoschema tigrense Obenberger, 1947Tetragonoschema torresi Cobos, 1959Tetragonoschema trinidadense Bellamy, 1991Tetragonoschema tucumanum Cobos, 1949Tetragonoschema undatum (Steinheil, 1874)Tetragonoschema vianai Obenberger, 1947Tetragonoschema vicinum Théry, 1944

Tetralogy of Fallot (TOF) is a type of heart defect present at birth. Symptoms include episodes of bluish color to the skin. When affected babies cry or have a bowel movement, they may develop a "tet spell" where they turn very blue, have difficulty breathing, become limp, and occasionally lose consciousness. Other symptoms may include a heart murmur, finger clubbing, and easy tiring upon breastfeeding.The cause is typically not known. Risk factors include a mother who uses alcohol, has diabetes, is over the age of 40, or gets rubella during pregnancy. It may also be associated with Down syndrome. Classically there are four defects:pulmonary stenosis, narrowing of the exit from the right ventriclea ventricular septal defect, a hole between the two ventriclesright ventricular hypertrophy, thickening of the right ventricular musclean overriding aorta, which allows blood from both ventricles to enter the aortaTOF is typically treated by open heart surgery in the first year of life. Timing of surgery depends on the baby's symptoms and size. The procedure involves increasing the size of the pulmonary valve and pulmonary arteries and repairing the ventricular septal defect. In babies who are too small a temporary surgery may be done with plans for a second surgery when the baby is bigger. Most people who are affected live to be adults. Long-term problems may include an irregular heart rate and pulmonary regurgitation.TOF occurs in about 1 in 2,000 newborns. Males and females are affected equally. It is the most common complex congenital heart defect. It was initially described in 1671 by Niels Stensen. A further description was published in 1888 by the French physician Étienne-Louis Arthur Fallot, after whom it is named. The first surgical repair was carried out in 1954.

1-Methyl-1H,2H,3H,4H,9H-pyrido[3,4-b]indole

Tetragonoderus elegans

The Tetrahedron Computer Methodology was a short lived journal that was published by Pergamon Press (now Elsevier) to experiment with electronic submission of articles in the ChemText format, and the sharing source code to enable reproducibility. It was the first chemical journal to be published electronically, with issues distributed in print and on floppy disks. It is likely it was also the first journal to accept submissions in a non-paper format (on floppy disks).

Tetragrammaton Labyrinth

Tetrahydropyranyl

Tetramorium is a genus of ants in the subfamily Myrmicinae that includes more than 520 species.Tetramorium was first described in the same publication as Monomorium.
Tetramorium

Tetragonula is a genus of stingless bees. In 1961, Brazilian bee expert, Professor J.S. Moure, first proposed the genus name Tetragonula to improve the classification system by dividing the large genus Trigona stingless bees 9 smaller groups. About 30 stingless bee species formerly placed in the genus Trigona are now placed in the genus Tetragonula. These bees are found in Oceania, in countries such as Australia, Indonesia, New Guinea, Malaysia, Thailand, The Philippines, India, Sri Lanka, and The Solomon Islands. The most recent tabulation of species listed 31 species.

Tetramethylhexadecenyl succinyl cysteine

Tetrahydroharmane

Tetrahemihexahedron

Tetrahydroxy-1,4-benzoquinone

Tetramagic square

Tetrahydroxy-p-benzoquinone

Tetrahydrofolate-methyltransferase deficiency syndrome

Tetrahydroxy-1,4-benzoquinone, also called tetrahydroxy-p-benzoquinone, tetrahydroxybenzoquinone, or tetrahydroxyquinone (THBQ, THQ), is an organic compound with formula C6O2(OH)4.

Tetrahydrocompound E

Tetralogy of Fallot

Tetragonoderus kuntzeni

Tetramethyl butanedinitrile

Tetraneuris lanigera

Tetrahedran

Tetrandromyces is a genus of fungi in the family Laboulbeniaceae. The genus contain 6 species.

Tetrahedral trapezohedron

Tetrahydroxydiborane

Tetrahydro-β-carbolines

Tetragraptus is an extinct genus of graptolites from the Ordovician period.

Tetramethylammonium pentafluoroxenate is the chemical compound with the formula N(CH3)4XeF5. The XeF−5 ion it contains was the first example of a planar pentagonal AX5E2 species. It was prepared by the reaction of N(CH3)4F with xenon tetrafluoride, N(CH3)4F being chosen because it can be prepared in anhydrous form and is readily soluble in organic solvents.

Tetragonoderus poecilus

Tetragonoderus pictus is a species of beetle in the family Carabidae. It was described by Perty in 1830.

Tetramagic cube

In geometry, the tetrahemihexahedron or hemicuboctahedron is a uniform star polyhedron, indexed as U4. It has six vertices, 12 edges, and seven faces: four triangular and three square. Its vertex figure is a crossed quadrilateral. Its Coxeter–Dynkin diagram is (although this is a double covering of the tetrahemihexahedron).It is the only non-prismatic uniform polyhedron with an odd number of faces.

Tetraneuris pygmaea

Tetraibidion aurivillii is a species of beetle in the family Cerambycidae. It was described by Gounelle in 1909.

Tetranacci Constant

Tetrahit

Tetrahydrocannabinolic acid (THCA) synthase (full name Δ1-tetrahydrocannabinolic acid synthase) is an enzyme responsible for catalyzing the formation of THCA from cannabigerolic acid (CBGA). THCA is the direct precursor of tetrahydrocannabinol (THC), the principal psychoactive component of cannabis, which is produced from various strains of Cannibis sativa. Therefore, THCA synthase is considered to be a key enzyme controlling cannabis psychoactivity. Polymorphisms of THCA synthase result in varying levels of THC in Cannabis plants, resulting in "drug-type" and "fiber-type" C. sativa varieties.

Tetramer (chemistry)

Tetrakis legomenon

Tetragonoderus dilatatus is a species of beetle in the family Carabidae. It was described by Wiedemann in 1823.

THN

Tetramethyluric acid

Tetramed

Tetraneura is a genus of woolly and gall-making aphids in the family Aphididae. There are at least 30 described species in Tetraneura.

Tetragonula

Tetramethylethylenediamine (data page)

*Tetramorium pusillum bantouana (Santschi, 1910)

Tetrakis(cyclopentadienyl)uranium

Tetrahydrofurfuryl acetate

Tetrahedron

Tetrahydrofuran-2-carboxylic acid

Tetragonoderus

Tetramoera schistaceana, the grey borer of sugar cane, is a moth of the Tortricidae family. It is found in Indonesia (Java), China (Guangdong), Taiwan, Malaysia, the Philippines, Mauritius, Hawaii, Madagascar and Réunion.The wingspan is 14–18 mm.The larvae feed on Saccharum dulce. The larvae make irregular short tunnels in the stem, usually near the surface and preferably in young hosts. Leaves of very young shoots may also be attacked, while in older canes the tops and older nodes may be damaged.

Tetrahedrane is a platonic hydrocarbon with chemical formula C4H4 and a tetrahedral structure. The molecule is subject to considerable angle strain. A number of derivatives have been prepared. Tetrahedranes describe a class of molecules and ions with related structures, e.g. white phosphorus.

Tetramerium is a genus of plants belonging to the family Acanthaceae. It is found mainly in the Americas, especially in tropical dry forests. Christian Gottfried Daniel Nees von Esenbeck first described the genus in 1846 after collecting two species (T. polystachyum and T. nervosum) on the journey of the HMS Sulphur.

Tetrahydro-2-furoic acid

Tetraiodonickelates

Tetragonoceras is an extinct prehistoric nautiloid genus from the nautilid family Tetragonoceratidae that lived during the Middle Devonian, found in Canada.Tetragonoceras has an openly spiralled, gyroconic shell with an almost square cross section, but with the venter on the outer rim broader than the dorsum on the inner. The sides are flattish and converge slightly on the dorsum and the ventro-lateral shoulders are angular. The suture of Tetragonoceras has slight lateral and ventral lobes separated by subangular saddles. The siphuncle is ventral and tubular. (Kummel 1964.). A member of the Tetragonoceratidae, Tetragonoceras is also a component of the superfamily Tainocerataceae.

Tetragonoderus subfasciatus

Tetrahedral geometry

Tetrahydrate

Tetragonoderus undatus is a species of beetle in the family Carabidae. It was described by Dejean in 1829.

Tetramethylene sulfide

Tetrameles is a genus of flowering plants in the family Tetramelaceae with one species, Tetrameles nudiflora. It grows as a large deciduous tree and is found across southern Asia from India through southeast Asia, Malesia, and into northern Australia.

Tetragonophthalma

Tetramolopium capillare

Tetramethyl orthocarbonate

Tetrahydrofuran (data page)

Tetrameristaceae

Tetragrammaton Labyrinth (Japanese: 断罪者〜Tetragrammaton Labyrinth〜, Hepburn: Danzaisha Tetragrammaton Labyrinth) is a Japanese manga series written and illustrated by Ei Itou. The manga was serialized in the Japanese seinen manga magazine Comic Gum between January 26, 2005 and November 26, 2007, published by Wani Books. The manga has been licensed by Los Angeles-based company Seven Seas Entertainment for distribution in the English language.

In enzymology, a tetrahydroxypteridine cycloisomerase (EC 5.5.1.3) is an enzyme that catalyzes the chemical reactiontetrahydroxypteridine ⇌ {\displaystyle \rightleftharpoons } xanthine-8-carboxylateHence, this enzyme has one substrate, tetrahydroxypteridine, and one product, xanthine-8-carboxylate.This enzyme belongs to the family of isomerases, specifically the class of intramolecular lyases.

Tetramethoxymethane

Tetrahedrite is a copper antimony sulfosalt mineral with formula: (Cu,Fe)12Sb4S13. It is the antimony endmember of the continuous solid solution series with arsenic-bearing tennantite. Pure endmembers of the series are seldom if ever seen in nature. Of the two, the antimony rich phase is more common. Other elements also substitute in the structure, most notably iron and zinc, along with less common silver, mercury and lead. Bismuth also substitutes for the antimony site and bismuthian tetrahedrite or annivite is a recognized variety. The related, silver dominant, mineral species freibergite, although rare, is notable in that it can contain up to 18% silver.Tetrahedrite gets its name from the distinctive tetrahedron shaped cubic crystals. The mineral usually occurs in massive form, it is a steel gray to black metallic mineral with Mohs hardness of 3.5 to 4 and specific gravity of 4.6 to 5.2.It occurs in low to moderate temperature hydrothermal veins and in some contact metamorphic deposits. It is a minor ore of copper and associated metals. It was first described in 1845 for occurrences in Freiberg, Saxony, Germany.

Tetrahydro-2-furoic acid; Tetrahydrofuran-2-carboxylic acid; Tetrahydrofuroic acid

Tetranaulochus

Tetragrammation

Tetragonoderus insularius is a species of beetle in the family Carabidae. It was described by Andrewes in 1931.

Tetragonoderus variegatus

Tetramolopium rockii is a rare species of flowering plant in the aster family known by the common name dune tetramolopium. It is endemic to Hawaii, where it is known only from the island of Molokai. It is threatened by habitat destruction and degradation caused by deer, cattle, introduced species of plants, and off road vehicles. It is a federally listed threatened of the United States.This plant is a small, mat-forming shrub growing no more than about 10 centimeters tall.

Tetraloops are a type of four-base hairpin loop motifs in RNA secondary structure that cap many double helices. There are many variants of the tetraloop. The published ones include ANYA, CUYG, GNRA, UMAC and UNCG.Three types of tetraloops are common in ribosomal RNA: GNRA, UNCG and CUUG, in which the N could be either uracil, adenine, cytosine, or guanine, and the R is either guanine or adenine.

Tripodion is a genus of flowering plants in the legume family, Fabaceae. It belongs to the subfamily Faboideae.

Tetramethylammonium hydroxide

Tetrahydrocannabinol-C4

Tetrahydrobiopterin (BH4, THB), also known as sapropterin, is a naturally occurring essential cofactor of the three aromatic amino acid hydroxylase enzymes, used in the degradation of amino acid phenylalanine and in the biosynthesis of the neurotransmitters serotonin (5-hydroxytryptamine, 5-HT), melatonin, dopamine, norepinephrine (noradrenaline), epinephrine (adrenaline), and is a cofactor for the production of nitric oxide (NO) by the nitric oxide synthases.

Tetrahalomethanes are fully halogenated methane derivatives of general formula CBrkCllFmInAtp, where:Tetrahalomethanes are on the border of inorganic and organic chemistry, thus they can be assigned both inorganic and organic names by IUPAC: tetrafluoromethane - carbon tetrafluoride, tetraiodomethane - carbon tetraiodide, dichlorodifluoromethane - carbon dichloride difluoride.Each halogen (F, Cl, Br, I, At) forms a corresponding halomethane, but their stability decreases in order CF4 > CH4 > CCl4 > CBr4 > CI4 from exceptionally stable gaseous tetrafluoromethane with bond energy 515 kJ.mol−1 to solid tetraiodomethane, depending on bond energy.Many mixed halomethanes are also known, such as CBrClF2.

The Tetrahedron Computer Methodology was a short lived journal that was published by Pergamon Press (now Elsevier) to experiment with electronic submission of articles in the ChemText format, and the sharing source code to enable reproducibility. It was the first chemical journal to be published electronically, with issues distributed in print and on floppy disks. It is likely it was also the first journal to accept submissions in a non-paper format (on floppy disks). The journal ceased publication owing to technical and non-technical reasons, and may have lacked sufficient institutional support. The last issue appeared in 1992 but was dated 1990.

ped

Tetramorium hungaricum is a species of ants in the family Formicidae found in Hungary, eastern Austria and Trassylvania, Central Europe. It occurs in grasslands of dry, south-exposed limestine or dolomitic slopes, also on sandy grasslands. Colonies tend to contain few to several (rarely up to few hundred) queens.

Tetrahydromethanopterin

Tetrahydropyrimidine

Tetrahedral pyramid

Tetrahydromethylcyclopentadiene dimer

Tetrakis(dimethylamino)titanium

Tetrahydropalmatine (THP) is an isoquinoline alkaloid found in several different plant species, mainly in the genus Corydalis (Yan Hu Suo), but also in other plants such as Stephania rotunda. These plants have traditional uses in Chinese herbal medicine.

Tetraiodothyronine 5 deiodinase

Tetramethyl lead

Tetramethyl succinodinitrile

Tetraneura

Tetranodus xanthocollis

Tetramolopium capillare is a rare species of flowering plant in the aster family known by the common name pamakani. It is endemic to Hawaii, where it is known only from the island of Maui. There are four occurrences for a total of fewer than 200 individuals. It is threatened by the degradation of its habitat caused by introduced plant species. It is a federally listed endangered species of the United States.This plant is a spreading shrub growing up to about 80 centimeters long and bearing solitary flower heads. It grows in shrubland and chaparral habitat, often on slopes and ridges.

Tetragonoderus insignicollis

Tetragonoderus insularius

Tetragonoderus dilatatus

In enzymology, a tetrahydroxypteridine cycloisomerase (EC 5.5.1.3) is an enzyme that catalyzes the chemical reactiontetrahydroxypteridine ⇌ {\displaystyle \rightleftharpoons } xanthine-8-carboxylateHence, this enzyme has one substrate, tetrahydroxypteridine, and one product, xanthine-8-carboxylate.This enzyme belongs to the family of isomerases, specifically the class of intramolecular lyases. The systematic name of this enzyme class is tetrahydroxypteridine lyase (isomerizing). It employs one cofactor, NAD+.

Tetraktys

Tetragonoderus quadrimaculatus

Tetrahydrofuranylfentanyl

Tetraneuris arizonica

Tetramethylpiperidine

Tetragonoderus foveicollis

A tetrahedral intermediate is a reaction intermediate in which the bond arrangement around an initially double-bonded carbon atom has been transformed from trigonal to tetrahedral. Tetrahedral intermediates result from nucleophilic addition to a carbonyl group. The stability of tetrahedral intermediate depends on the ability of the groups attached to the new tetrahedral carbon atom to leave with the negative charge.

Tetralopha diluculella

Tetragonoderus leleupi

Tetrahydrocannabinol-C4, also known as THC-C4 and butyl-THC, is a homologue of tetrahydrocannabinol (THC), the active component of cannabis. They are only different by the pentyl side chain being replaced by a butyl side chain. It is unknown whether THC-C4 is an agonist, partial agonist, or antagonist at the cannabinoid receptors. The propyl analog, THCV, is a cannabinoid receptor type 1 and cannabinoid receptor type 2 antagonist, while THC is a CB1 agonist. THC-C4 has rarely been isolated from cannabis samples, but appears to be less commonly present than THC or THCV. It is metabolised in a similar manner to THC. Similarly to THC, it has 7 double bond isomers and 30 stereoisomers.It is not scheduled by Convention on Psychotropic Substances.

Tetrahydroxypteridine cycloisomerase

Tetrahydrobiopterin

Tetramethylcyclopropylfentanyl

Tetrakis (disambiguation)

Tetraminobiphenyl

Tetragonoderus mexicanus

Tetrakis Hexahedron

In enzymology, a tetrahydroxynaphthalene reductase (EC 1.1.1.252) is an enzyme that catalyzes the chemical reactionscytalone + NADP+ ⇌ {\displaystyle \rightleftharpoons } 1,3,6,8-tetrahydroxynaphthalene + NADPH + H+Thus, the two substrates of this enzyme are scytalone and NADP+, whereas its 3 products are 1,3,6,8-tetrahydroxynaphthalene, NADPH, and H+.This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor.

Tetraneuris formosa

The tetrahedral-octahedral honeycomb, alternated cubic honeycomb is a quasiregular space-filling tessellation (or honeycomb) in Euclidean 3-space. It is composed of alternating octahedra and tetrahedra in a ratio of 1:2.Other names include half cubic honeycomb, half cubic cellulation, or tetragonal disphenoidal cellulation. John Horton Conway calls this honeycomb a tetroctahedrille, and its dual a dodecahedrille.It is vertex-transitive with 8 tetrahedra and 6 octahedra around each vertex. It is edge-transitive with 2 tetrahedra and 2 octahedra alternating on each edge.A geometric honeycomb is a space-filling of polyhedral or higher-dimensional cells, so that there are no gaps. It is an example of the more general mathematical tiling or tessellation in any number of dimensions.Honeycombs are usually constructed in ordinary Euclidean ("flat") space, like the convex uniform honeycombs. They may also be constructed in non-Euclidean spaces, such as hyperbolic uniform honeycombs. Any finite uniform polytope can be projected to its circumsphere to form a uniform honeycomb in spherical space.It is part of an infinite family of uniform honeycombs called alternated hypercubic honeycombs, formed as an alternation of a hypercubic honeycomb and being composed of demihypercube and cross-polytope facets. It is also part of another infinite family of uniform honeycombs called simplectic honeycombs.In this case of 3-space, the cubic honeycomb is alternated, reducing the cubic cells to tetrahedra, and the deleted vertices create octahedral voids. As such it can be represented by an extended Schläfli symbol h{4,3,4} as containing half the vertices of the {4,3,4} cubic honeycomb.There's a similar honeycomb called gyrated tetrahedral-octahedral honeycomb which has layers rotated 60 degrees so half the edges have neighboring rather than alternating tetrahedra and octahedra.