Animalia

Heterocrossa ferruginea

H. oxylitha

Heterodon contortrix

H. mentella

Garden eels

Heterodoxa hivaoae

Heterodoxa fatuhivae

Heterocyclic amines, also sometime referred to as HCAs, are chemical compounds containing at least one heterocyclic ring, which by definition has atoms of at least two different elements, as well as at least one amine (nitrogen-containing) group. Typically it is a nitrogen atom of an amine group that also makes the ring heterocyclic (e.g., pyridine), though compounds exist in which this is not the case (e.g., the drug Zileuton). The biological functions of heterocyclic amines vary, including vitamins and carcinogens. Carcinogenic heterocyclic amines are created by high temperature cooking of meat, for example.

The garden eels are the subfamily Heterocongrinae in the conger eel family Congridae. The majority of garden eels live in the Indo-Pacific, but species are also found in warmer parts of the Atlantic Ocean (including the Caribbean) and East Pacific. These small eels live in burrows on the sea floor and get their name from their practice of poking their heads from their burrows while most of their bodies remain hidden.

Heterodontosuchus

clade Caenogastropoda

Arthropoda

Genera

Heterodontus ramalheira

Heterocrossa solutella

Heterodox Economics

Heterocycla

Heteroconger

Reconstruction of Fruitadens

Heterodraba

Heterodoxy in a religious sense means "any opinions or doctrines at variance with an official or orthodox position". Under this definition, heterodoxy is similar to unorthodoxy, while the adjective "heterodox" could be applied to a dissident.Heterodoxy is also an ecclesiastical term of art, defined in various ways by different religions and churches.

Subspecies

Heteroderces paeta

* Leptocephalus congroides (D'Ancona, 1928)

Heterodera schactii

Heteroconger camelopardalis

Heterocyclus petiti

Heteroconger obscurus

Heterocrossa tincta

Insecta

Heterocrossa gemmata

Heterodrilus flexuosus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.

Heterodontosaurus is a genus of heterodontosaurid dinosaur that lived during the Early Jurassic period, 200–190 million years ago. Its only known member species, Heterodontosaurus tucki, was named in 1962 based on a skull discovered in South Africa. The genus name means "different toothed lizard", in reference to its unusual, heterodont dentition; the specific name honors G. C. Tuck, who supported the discoverers. Further specimens have since been found, including an almost complete skeleton in 1966.Though it was a small dinosaur, Heterodontosaurus was one of the largest members of its family, reaching between 1.18 m (3.9 ft) and possibly 1.75 m (5.7 ft) in length, and weighing between 2 and 10 kg (4.4 and 22.0 lb). The body was short with a long tail. The five-fingered forelimbs were long and relatively robust, whereas the hind-limbs were long, slender, and had four toes. The skull was elongated, narrow, and triangular when viewed from the side. The front of the jaws were covered in a horny beak. It had three types of teeth; in the upper jaw, small, incisor-like teeth were followed by long, canine-like tusks. A gap divided the tusks from the chisel-like "cheek teeth".Heterodontosaurus is the eponymous and best known member of the family Heterodontosauridae. This family is considered one of the most primitive or basal groups within the order of ornithischian dinosaurs. In spite of the large tusks, Heterodontosaurus is thought to have been herbivorous, or at least omnivorous. Though it was formerly thought to have been capable of quadrupedal locomotion, it is now thought to have been bipedal. Tooth replacement was sporadic and not continuous, unlike its relatives. At least four other heterodontosaurid genera are known from the same geological formations as Heterodontosaurus.

†Cycloconchidae

Heterodrilus flexuosus

Myoida

Heterodera

Heterodermia speciosa

Heteroconger camelopardalis is an eel in the family Congridae (conger/garden eels). It was described by Hugh Roger Lubbock in 1980. It is a non-migratory marine, tropical eel which is known from the southwestern and southeastern Atlantic Ocean, including northeastern Brazil and Ascension Island. Its population is abundant in Brazil.

†Hippuritoida

Heterodoxa uahukae is a species of ulidiid or picture-winged fly in the genus Heterodoxa of the family Ulidiidae.

Heterodontosaurs

Heterodoxy was the name adopted by a feminist debating group in Greenwich Village in the early 20th century. It was notable for providing a forum for the development of more radical conceptions of feminism than the suffrage and women's club movements of the time.Heterodoxy was founded in 1912 by Marie Jenney Howe, who specified only one requirement for membership: that the applicant "not be orthodox in her opinion".

Heterodox macroeconomics

Orders

Heterocyclus

Heterocyclus perroquini

Heterodea is a genus of lichenized fungi in the family Cladoniaceae.

Heteroderces oxylitha

Heterocyclic compound

Heterocyphelium

Heterocysts are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as Nostoc punctiforme, Cylindrospermum stagnale, and Anabaena sphaerica. They fix nitrogen from dinitrogen (N2) in the air using the enzyme nitrogenase, in order to provide the cells in the filament with nitrogen for biosynthesis. Nitrogenase is inactivated by oxygen, so the heterocyst must create a microanaerobic environment.

Athysanus unilateralis

Heterodea

Heterodon nasicus

Heterodon niger

Heterocyclic compounds

Heterodera zeae

Heteroconger tomberua is an eel in the family Congridae (conger/garden eels). It was described by Peter Henry John Castle and John Ernest Randall in 1995. It is a marine, tropical eel which is known from the western central Pacific Ocean, including Fiji and possibly (based on leptocephali) New Caledonia, the Philippines, the Nicobar Islands, Papua New Guinea, and Sri Lanka. It is known to dwell at a depth of 36 m (118 ft). Males can reach a maximum total length of 42.8 cm (16.9 in).

H. expansalis

Heterodoxy

Heterodontia tricolor

Heterodontia

Heterocypsela

Heterodisomy

Crompton & Charig, 1962

June

Heteroctenia is a genus of moth in the family Geometridae.

*Heterodera schachtii minor O.Schmidt, 1930

Heterodimeric amino acid transporter

Heterodrilus

Castle & Randall, 1999

Heterocrossa olivaceonitens

H. congroides

Heterocycles (disambiguation)

Heterocyclic antidepressant

Heterodeltis

Heterocumulenes are molecules consisting of a linear chain of carbon atoms with one or more of another atom attached to the end. The carbon atoms are all joined joined by double bonds C=C=C=C. Similar molecules termed cumulenic, have a chain of alternating triple and single bonds. C≡C-C≡C-.... Heterocumulenes are found in space or flames.

H. tomberua

Heterodoxa uahukae

Heterodera medicaginis (Alfalfa cyst nematode) is a plant pathogenic nematode which is cited as an invasive species. It is closely allied to Heterodera daverti, H. glycines and H. sonchophila in the H. schachtii-group. The only known host plant of this obligate parasite is the important crop alfalfa or lucerne, Medicago sativa.

Heterocrossa canescens

Heteroculpinia

*H. ganei (Lucas, 1898 )

Heteroderces paeta is a moth in the Lecithoceridae family. It was described by Meyrick in 1929. It is found in Sri Lanka.The wingspan is about 8 mm. The forewings are white, faintly irrorated greyish, with some minute scattered black specks. The costal edge is black at the base and the discal stigmata are black, the first small, the second rather large and round, a rather large black dot below and rather obliquely before it. The hindwings are grey.

Heterocyclic amines are a group of chemical compounds, many of which can be formed during cooking. They are found in meats that are cooked to the "well done" stage, in pan drippings and in meat surfaces that show a brown or black crust. Epidemiological studies show associations between intakes of heterocyclic amines and cancers of the colon, rectum, breast, prostate, pancreas, lung, stomach/esophagus and animal feeding experiments support a causal relationship. The U.S.

Heterodoxa

Heterodraba unilateralis

Heterocrossa philpotti

Nyl.

Heterocrossa viridis

Heterodontagama borsukae

Heterocrossa epomiana

A heterocyclic compound or ring structure is a cyclic compound that has atoms of at least two different elements as members of its ring(s). Heterocyclic chemistry is the branch of organic chemistry dealing with the synthesis, properties, and applications of these heterocycles.Examples of heterocyclic compounds include all of the nucleic acids, the majority of drugs, most biomass (cellulose and related materials), and many natural and synthetic dyes.

Heterodeltis trichroa

clade Hypsogastropoda

Heterodontiformes

Heterodisca is a genus of moth in the family Geometridae.

Heterodera avenae, the cereal cyst nematode or Ustinov cyst nematode, is a plant pathogen and an obligate parasite of cereal crops including barley, oats, wheat and rye. Cereal crops infected with this nematode are more susceptible to infection by fungal diseases such as rhizoctonia root rot.

Heterocrossa morbida

Heteroconger tomberua

Heterodox medicine

Heterocyclus perroquini is a species of minute freshwater snail with an operculum, aquatic gastropod mollusc or micromollusc in the family Hydrobiidae. This species is endemic to New Caledonia.

Heteroconger congroides

Heterocrasa

Heterocrossa inscripta

Heterodimerize

Heterocycle forming reaction

H. chapmani

Heterodisca

Heterodon simus

IUCN2.3

Heterocyphelium leucampyx

Heterocrossa cryodana

Heterocorys breviunguis

Heteroconger chapmani is an eel in the family Congridae (conger/garden eels). It was described by Albert William Herre in 1923. It is a marine, tropical eel which is known from a single specimen collected from the Philippines, in the western central Pacific Ocean. The holotype specimen measured 69 cm (27 in). The species is now considered unidentifiable due to the lack of detail in the author's description, and because the only known specimen was destroyed during World War II.

Heterodoxa uapouae is a species of ulidiid or picture-winged fly in the genus Heterodoxa of the family Ulidiidae.

Heterodactyl

Greene

Heterocyclus is a genus of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Hydrobiidae.

H. hivaoae

Heterocyclic Chemistry

Heteroconger cobra

December 2009

R.M.King & H.Rob.

Heterocrita is a genus of moth in the family Geometridae.

The spotted Heteroconger hassi and striped Gorgasia preclara

Heterocrossa herbarum

Heterocrossa subumbrata

Heterocycles is a scientific journal on the topic of heterocyclic compounds. In 2006 it was awarded the "In Memory of Professor A.N. Kost" medal by Lomonosov Moscow State University and Mendeleev Russian Chemical Society.The impact factor of this journal is 1.079 (2014).

Heteroderces oxylitha is a moth in the Lecithoceridae family. It was described by Meyrick in 1929. It is found in India (Assam).The wingspan is 10-11 mm. The forewings are light brownish-ochreous, with the bases of the scales tinged whitish and the base of the costa suffused dark fuscous. The stigmata are black, the first discal forming an oval spot touching a dot before it, the plical linear, obliquely before the first discal, the second discal moderate, tending to be linear.

Heterodeltis mentella is a moth in the Lecithoceridae family. It was described by Felder and Rogenhofer in 1875.

Heterodon browni

Heterodelta

Heterocrasa expansalis

Heteroderces

Heterocrossa iophaea

Heteroconger is a genus of marine congrid eels. These small, slender garden eels live in groups where each individual has its own burrow. Usually, only the head and front half of the body is visible. The greatest species richness is in the Indo-Pacific, but species are also found in the warmer parts of the Atlantic (including the Caribbean) and the eastern Pacific. Its name relates to how a huge colony of the eels looks swaying in the current.The garden eel is roughly 40 cm (16 in) long. The eel has large eyes compared to its body, and a weak sense of smell because of its tiny nostrils. It is timid around other animals and people, but slightly aggressive towards other males of its species. If it feels threatened, it retreats into its burrow and closes it with a mucus block so the predator cannot dig into its home. It has a gland in its tail that secretes a sticky substance that keeps the burrow from falling in on itself and burying the garden eel in sand. Scientists have yet to figure out the garden eel's lifespan in the wild.The garden eel is a carnivore, and eats plankton. Because of its large eyes, it relies mostly on sight to find its food. It catches the plankton by staying in its burrow and swaying its head about to catch the plankton drifting by in the current.Garden eels are sexual reproducers and sexually dimorphic. In the mating season, the eels move their burrows closer together, until they are within reaching distance. Then, the male picks which female he wants to mate and defends her viciously, biting at the head and even the eyes of any other suitors. The couple mates and the female releases the fertilized eggs, letting them float away and gather around the epipelagic zone. The garden eels develop and hatch out of their eggs while floating in the water and, when they are large enough, swim down to a sand bed and dig a burrow of their own.One of its top predators, the Pacific snake eel, Ophicthus triserialis, burrows into the sand near a colony, then digs under a garden eel’s burrow and grabs its tail. This all happens under the substrate, where the unsuspecting garden eel cannot see what is happening. Trigger fish scare the garden eels into retreating into their burrows, then dig them up and devour them.

Heterodactylus

Heterocrossa dispar

Heterocyclic

Heterodera avenae
*Bidera avenae (Wollenweber) Krall & Krall, 1978)

Heterocyclic amines

Heterodictyna walckenaeri

* Taenioconger camelopardalis (Lubbock, 1980)

Heterodera schachtii (Beet cyst eelworm, Sugarbeet nematode) is a plant pathogenic nematode. It infects more than 200 different plants including economically important crops such as sugar beets, cabbage, broccoli, and radish. H. schachtii is found worldwide. Affected plants are marked by stunted growth, wilting, yellowing, decreased yields, and death. While there are many methods of control, crop rotation with non-susceptible plants is preferred.

Spix, 1825

Heterocroton

Heterocumulene

*Oecophora mentella (Felder & Rogenhofer, 1875)

Warren, 1896

Heterodoxy (magazine)

Heterodonta is a taxonomic subclass of saltwater clams, marine bivalve molluscs. This subclass includes the edible clams, the cockles and the Venus clams.

The garden eels are the subfamily Heterocongrinae in the conger eel family Congridae. The majority of garden eels live in the Indo-Pacific, but species are also found in warmer parts of the Atlantic Ocean (including the Caribbean) and East Pacific. These small eels live in burrows on the sea floor and get their name from their practice of poking their heads from their burrows while most of their bodies remain hidden. Since they tend to live in groups, the many eel heads "growing" from the sea floor resemble the plants in a garden. They vary greatly in colour depending on the exact species involved. The largest species reaches about 120 cm (47 in) in length, but most species do not surpass 60 cm (24 in).

Heterodermia is a genus of lichenized fungi in the family Physciaceae. The genus has a widespread distribution, especially in tropical regions, and contains about 80 species.

Heterodox economic

Heterodelta is a genus of moths of the Noctuidae family.

Heterodea muelleri

Heterocrossa sarcanthes

Heterocondylus

yes

Heteroculpinia is a genus of moth in the family Geometridae.

Heterodontus omanensis

Heterodera humuli is a plant pathogenic nematode, the hop cyst nematode. It is an obligate parasite and infests hop plants, Humulus lupulus.

H. fatuhivae

Heteroconger klausewitzi

Heterocrossa plumbeonitida

Heterodimeric amino acid transporters

Heteroctenia

Heterocrossa corticella

Heterodoxa uapouae

Heterodimerization

Heterocrossa adreptella

Heterodiamond is a superhard material containing boron, carbon, and nitrogen (BCN). It is formed at high temperatures and high pressures, e.g., by application of an explosive shock wave to a mixture of diamond and cubic boron nitride. The heterodiamond is a polycrystalline material coagulated with nano-crystallites and the fine powder is tinged with deep bluish black. The heterodiamond has both the high hardness of diamond and the excellent heat resistance of cubic BN. These characteristic properties are due to the diamond structure combined with the sp3 σ-bonds among carbon and the hetero atoms.Cubic BC2N can be synthesized from graphite-like BC2N at pressures above 18 GPa and temperatures higher than 2200 K. The bulk modulus of c-BC2N is 282 GPa which is one of the highest bulk moduli known for any solid, and is exceeded only by the bulk moduli of diamond and c-BN. The hardness of c-BC2N is higher than that of c-BN single crystals.

*Tylenchus schachtii (Schmidt, 1871) Örley, 1880)

Heterodontus francisci

In anatomy, a heterodont (from Greek, meaning "different teeth") is an animal which possesses more than a single tooth morphology. For example, members of the Synapsida generally possess incisors, canines ("eyeteeth"), premolars, and molars. The presence of heterodont dentition is evidence of some degree of feeding/hunting specialization in a species. In contrast, homodont dentition refers to a set of teeth that possess the same tooth morphology.

Heterodontid

Heterodiamond is a superhard material containing boron, carbon, and nitrogen (BCN). It is formed at high temperatures and high pressures, e.g., by application of an explosive shock wave to a mixture of diamond and cubic boron nitride. The heterodiamond is a polycrystalline material coagulated with nano-crystallites and the fine powder is tinged with deep bluish black. The heterodiamond has both the high hardness of diamond and the excellent heat resistance of cubic BN.

Heterocypsela is a genus of flowering plants in the daisy family.SpeciesThere is only one known species, Heterocypsela andersonii, native to the State of Minas Gerais in Brazil.

J. E. Böhlke & J. E. Randall, 1981

Heterodera vigni

clade Littorinimorpha

Heteroconger halis

Heterodoxy (group)

*Pseudophyscia (Müll.Arg. )
*Chaudhuria (Zahlbr. )

Cereal cyst nematode

Heterocrossa divaricata

Heterocrita chersodes

H. perroquini

Heterodite

Heterocyclic amines are a group of chemical compounds, many of which can be formed during cooking. They are found in meats that are cooked to the "well done" stage, in pan drippings and in meat surfaces that show a brown or black crust. Epidemiological studies show associations between intakes of heterocyclic amines and cancers of the colon, rectum, breast, prostate, pancreas, lung, stomach/esophagus and animal feeding experiments support a causal relationship. The U.S. Department of Health and Human Services Public Health Service labeled several heterocyclic amines as likely carcinogens in its 13th Report on Carcinogens. Changes in cooking techniques reduce the level of heterocyclic amines.

Heterocyphelium is a fungal genus in the division Ascomycota. The relationship of this taxon to other taxa within the class is unknown (incertae sedis), and it has not yet been placed with certainty into any class, order, or family. This is a monotypic genus, containing the single species Heterocyphelium leucampyx.

Heterocrossa distincta

Heterodera schachtii major

Heterocrossa ignobilis

Heterodimeric

Heteroderis aegyptiaca

Heteroderis stocksiana

See text.

Heterodon platirhinos

Heterodon platyrhinus

The venerid species, Austrovenus stutchburyi, the New Zealand cockle, is sold internationally as sea food

Heterodontosauriformes are a group of herbivorous dinosaurs within the order Ornithischia. The taxon was named by Xu et al. in 2006 to group the suborder Marginocephalia with the family Heterodontosauridae (previously classified as ornithopods), after the discovery of Yinlong revealed the two to be closely related.

Heterocrossa mauii

Heterodon platyrhinos

Heterodoxa fatuhivae is a species of ulidiid or picture-winged fly in the genus Heterodoxa of the family Tephritidae.

Heterocyclus anodonta

Heterodontus mexicanus

Heteroderces is a genus of moth in the family Lecithoceridae.

Heteroconger is a genus of marine congrid eels. These small, slender garden eels live in groups where each individual has its own burrow. Usually, only the head and front half of the body is visible. The greatest species richness is in the Indo-Pacific, but species are also found in the warmer parts of the Atlantic (including the Caribbean) and the eastern Pacific. Its name relates to how a huge colony of the eels looks swaying in the current.The garden eel is roughly 40 cm (16 in) long.

Heterocrossa thalamota

Early Jurassic,

Heteroconger digueti

Heterocryphia

Heterodonty

Heterocyclic compounds with 4 or more rings

Heterodoxies

H. paeta

Heterocyclus petiti is a species of minute freshwater snail with an operculum, aquatic gastropod mollusc or micromollusc in the family Hydrobiidae. This species is endemic to New Caledonia.

Lucas, 1898

Heterocyclic Amine Formation in Meat

HTCYAM

Heterodonta

Heteroconger chapmani

H. uahukae

H. schachtii

Heterodontosaurus

Heterocrossa graminis

H. petiti

Kirjanova & Krall, 1971

Heterodontosaurinae is an extinct subfamily of heterodontosaurid ornithischian dinosaurs from the earliest to the mid Middle Jurassic (Hettangian - Bajocian) of Africa and South America. Currently, the basalmost known heterodontosaurine is Lycorhinus angustidens from the Early Jurassic of Cape Province, South Africa.

Heterodimeric amino-acid transporter

Heterodorididae

Heterodontosuchus is a dubious genus of extinct phytosaur. The genus was first described from a fragmentary anterior section of the mandible found from the Henry Mountains in southeastern Utah, USA. More fossils were later found from Arizona. The name Heterodontosuchus refers to the difference in size between anterior and posterior teeth on this mandible. The teeth were compressed antero-posteriorly spaced closely together.

Heterodoxy in a religious sense means "any opinions or doctrines at variance with an official or orthodox position". Under this definition, heterodoxy is similar to unorthodoxy, while the adjective "heterodox" could be applied to a dissident.Heterodoxy is also an ecclesiastical term of art, defined in various ways by different religions and churches. For example, in the Apostolic Churches (the Orthodox Church, the Roman Catholic Church, the Church of the East, and the Non-Chalcedonian or Oriental Churches), heterodoxy may describe beliefs that differ from strictly orthodox views, but that fall short either of formal or of material heresy.

Heterodontus portusjacksoni

Heterodontosaurus tucki

Heterodimeric amino-acid transporters are a family of transport proteins that facilitate the transport of certain amino acids across cell membranes. Each transporter comprises a two-protein, a light and heavy, subunit. Transport activity is located in the light subunit.The following table lists the members of this family:

Heterocyclic antidepressants inhibit the nerve cells' ability to reuptake norepinephrine and serotonin. This group of drugs, once the mainstay of treatment, include:Tricyclic antidepressantsTetracyclic antidepressantsTiazesim, an old antidepressant that falls into neither group

Heteroconger luteolus

Heteroconger mercyae

Heteroderis leucocephala

Meyrick, 1929

Heterocrossa gonosemana

Heterodontosauriformes

Heterocongrinae

Heterodactylus is a genus of gymnophthalmid lizards endemic to Brazil.

Heterodera schachtii minor

Heteroconger balteatus

Heterocrossa punctulata

Heterodera humuli

Heterodera maior

Heterodermia

Heterodon contortrix browni

Heterocrossa irrorata

Heterodontus galeatus

H. avenae

Crosse, 1872 http://www.ubio.org/NZ/search.php?search=Heterocyclus&quickSearch=QuickSearch&selectall=Check+All&colname=on&colcategory=on&colauthority=on&colcomments=on&page=&vol=

*Heterodera schachtii major (O.Schmidt, 1930)

Heteroconger enigmaticus

Gorgasia

Heterocyclic compounds, 1-ring

Heterodontus philippi

Heterocrossa

Heterodera ustinovi

Heterodactyly

Heterocrossa pygmaeella

Heterocrossa maculosa

Heterodontosaur

Heteroconger hassi

Heterodontosaurid

H. medicaginis

Heterocrossa exochana

Heterodox economics movement

Heterodontagama is an extinct genus of iguanian lizard from the early Eocene of India. It belongs to the extinct family Priscagamidae, which is otherwise only known from the Late Cretaceous of Mongolia. The type species Heterodontagama borsukae was named in 2013 from several isolated upper and lower jaws found in an exposure of the Cambay Formation in an open-pit coal mine in Gujarat.Heterodontagama has a distinctively heterodont dentition. The two pairs of teeth at the front of the lower jaw are enlarged, pointed, and pleurodont, meaning that they grow from the inner surface of the jaw. The four following pairs of teeth are much smaller and acrodont, meaning that they grow from the upper margin of the jaw. Behind them are four pairs of larger, laterally compressed, and triangular acrodont teeth.

Heterocycle

Heteroconger cobra, sometimes known as the cobra garden eel, is a species of garden eel of the family Congridae, found in the western Central Pacific from Honiara, the Solomon Islands to Port Moresby, Papua New Guinea.They occur in colonies, on sloping sand bottoms. They are known to be very frightened of humans. When they are spotted, these eels dart back into the holes in which they live.

*Eupatorium sect. Heterocondylus (R.M.King & H.Rob.)

Heterocryphia is a genus of moths of the Noctuidae family.

Heterocrossa trigononotata

Heterocrossa graminicolor

Lucinoida

Heterodimers

Heterocrossa togata

*Bidera ustinovi (Kirjanova) Krall & Krall, 1978)

Heterocrossa cervinella

Heterodraba is a monotypic genus of plants in the mustard family containing the single species Heterodraba unilateralis, which is known by the common name ladiestongue mustard. It is native to western North America, where it can be found in Oregon, central California, and northern Mexico, generally in open, grassy habitats. It is an annual herb with a short, hairy stem bearing small white flowers.

H. andersonii

Heterodimer

Heterocycles (journal)

Heteroconger congroides is an eel in the family Congridae (conger/garden eels). It was described by Umberto D'Ancona in 1928, originally under the genus Leptocephalus. It is a marine, deepwater-dwelling eel which is known from the Kamaran Islands in Yemen, in the Red Sea, in the western Indian Ocean. It is known only from larvae, which are known from a depth of 522 m (1,713 ft).

H. trichroa

Heterodera schachtii subsp. maior

Species

Heterocrossa bicincta

Heterocrossa achroana

Heterodera medicaginis

Heterodeltis trichroa is a moth in the Lecithoceridae family. It was described by Meyrick in 1906. It is found in Sri Lanka.The wingspan is about 14 mm. The forewings are dark brown, with the basal third dark purple-fuscous. There is a triangular white blotch on the dorsum beyond one-fourth, reaching more than half across the wing and a cloudy ochreous-yellow dot on the costa before the middle, as well as a triangular ochreous-yellow patch extending along the costa from the middle to four-fifths, and reaching more than half across the wing. The hindwings are rather dark fuscous, in males with a subdorsal furrow throughout, filled with very long expansible pale fuscous hairs.

Anomalodesmata

Heterodon de filippii

H. balteatus

Veneroida

Eupatorium vitalbae

Heterodontosaurine

Heterodera schachtii

Heterodeltis is a genus of moth in the family Lecithoceridae.

Heterodontidae

Early Jurassic-Middle Jurassic,

H. uapouae

Heterodontus zebra

Heterocrossa mimica

Heterocrossa nigronotata

Vain.

Heterocycles

Cereal cyst nematode (CCN)

Heterocysts

Heterodoxa hivaoae is a species of ulidiid or picture-winged fly in the genus Heterodoxa of the family Ulidiidae.

Heterocrossa subolivacea

Heterodeltis mentella

Heterocrossa sanctimonea

Heteroconger perissodon

Heterodera schachtii var. avenae

Carditoida

Erséus, 1990

Heterocrossa pusilla

Heterodontosaurinae

Early Eocene

Heterodox chess

Heterodera glycines

Heteroconger balteatus is an eel in the family Congridae (conger/garden eels). It was described by Peter Henry John Castle and John Ernest Randall in 1999. It is a marine, tropical eel which is known from Saudi Arabia and the Red Sea, in the western Indian Ocean. It is known to dwell at a minimum depth of 46 m (151 ft), and inhabits regions of current, where it forms burrows in sand. It enters its burrows tail-first. Females can reach a maximum total length of 33.1 cm (13.0 in).The species epithet balteatus refers to the white "belt" on the trunk of the eel. Its diet consists of zooplankton.

H. unilateralis

Heterodont

*Heterobolbus schachtii (Schmidt, 1871)Railliet, 1896)

Heterocrossa crinifera

Heterocrossa contactella

Plantae

Heterocyclic ring

Heteroconger taylori

Spotted garden eel, Heteroconger hassi

Heteroconger pellegrini

*Tipha trichroa (Meyrick, 1906)

Sauropsida

Heterocrasa is a genus of snout moths. It was described by Warren in 1896, and contains the species H. expansalis. It is found in India.

Heterodontus

Heteroderces oxylitha is a moth in the Lecithoceridae family. It was described by Meyrick in 1929. It is found in India (Assam).The wingspan is 10-11 mm. The forewings are light brownish-ochreous, with the bases of the scales tinged whitish and the base of the costa suffused dark fuscous. The stigmata are black, the first discal forming an oval spot touching a dot before it, the plical linear, obliquely before the first discal, the second discal moderate, tending to be linear. An elongate mark of dark fuscous suffusion is found on the costa above the second discal veins posteriorly tending to be streaked fuscous. There are also some small black angular dots on the termen. The hindwings are light grey.

*Bidera avenae ( Krall & Krall, 1978)
*Bidera ustinovi ( Krall & Krall, 1978)
*Heterodera schachtii major (O.Schmidt, 1930)
*Heterodera ustinovi (Kirjanova, 1969)
*Heterodera schachtii var. avenae
*Heterodera schachtii subsp. maior
*Heterodera maior ( Franklin, 1940)
*Heterodera schachtii var. avenae

*Heterodera maior (O. schmidt, 1930) Franklin, 1940)

Heterodontus quoyi

Heterocrossa gracillima

†Lyrodesmatidae

*Lycorhinus tucki (Thulborn, 1970)

Heterocrita

Heterodontosaurus is a genus of heterodontosaurid dinosaur that lived during the Early Jurassic period, 200–190 million years ago. Its only known member species, Heterodontosaurus tucki, was named in 1962 based on a skull discovered in South Africa. The genus name means "different toothed lizard", in reference to its unusual, heterodont dentition; the specific name honors G. C. Tuck, who supported the discoverers.

Rana et al., 2013

Heterocyclic amines, also sometime referred to as HCAs, are chemical compounds containing at least one heterocyclic ring, which by definition has atoms of at least two different elements, as well as at least one amine (nitrogen-containing) group. Typically it is a nitrogen atom of an amine group that also makes the ring heterocyclic (e.g., pyridine), though compounds exist in which this is not the case (e.g., the drug Zileuton).

*†H. tucki (Crompton & Charig, 1962 )

cobra

Heterodox

Heterocyclic chemistry

Heterocrossa rubophaga

Heterocrossa atronotata

Heterocrossa charaxias

Heteroconger balteatus is an eel in the family Congridae (conger/garden eels). It was described by Peter Henry John Castle and John Ernest Randall in 1999. It is a marine, tropical eel which is known from Saudi Arabia and the Red Sea, in the western Indian Ocean. It is known to dwell at a minimum depth of 46 m (151 ft), and inhabits regions of current, where it forms burrows in sand. It enters its burrows tail-first.

Heterocypsela andersonii

*Tylenchus schachtii ( Örley, 1880)
*Heterobolbus schachtii ( Railliet, 1896)
*Heterodera schachtii minor O.Schmidt, 1930

Heterocrossa eriphylla

Bleeker, 1868

* Lycorhinus
* Pegomastax
* Manidens
* Abrictosaurus
* Heterodontosaurus

Heterocyst

Heteroconger canabus

Wollenweber, 1924

Trevis.

Heterodontosaurinae is an extinct subfamily of heterodontosaurid ornithischian dinosaurs from the earliest to the mid Middle Jurassic (Hettangian - Bajocian) of Africa and South America. Currently, the basalmost known heterodontosaurine is Lycorhinus angustidens from the Early Jurassic of Cape Province, South Africa. Heterodontosaurines are small-bodied ornithischians characterized by their cheek tooth crowns that are taller than wide, and jaw joint set below the axis of occlusion between maxillary and dentary teeth. Heterodontosaurinae was implicitly named in 1966 by Oskar Kuhn as he is the author of the family Heterodontosauridae. It is a stem-based taxon defined phylogenetically for the first time by Paul Sereno in 2012 as "the most inclusive clade containing Heterodontosaurus tucki Crompton and Charig 1962 but not Tianyulong confuciusi Zheng et al. 2009, Fruitadens haagarorum Butler et al. 2010, Echinodon becklesii Owen 1861."

* Taenioconger chapmani (Herre, 1923)

Heteroderis pusilla

Heterocysts are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as Nostoc punctiforme, Cylindrospermum stagnale, and Anabaena sphaerica. They fix nitrogen from dinitrogen (N2) in the air using the enzyme nitrogenase, in order to provide the cells in the filament with nitrogen for biosynthesis. Nitrogenase is inactivated by oxygen, so the heterocyst must create a microanaerobic environment. The heterocysts' unique structure and physiology require a global change in gene expression. For example, heterocysts:produce three additional cell walls, including one of glycolipid that forms a hydrophobic barrier to oxygenproduce nitrogenase and other proteins involved in nitrogen fixationdegrade photosystem II, which produces oxygenup-regulate glycolytic enzymesproduce proteins that scavenge any remaining oxygencontain polar plugs composed of cyanophycin which slows down cell-to-cell diffusionCyanobacteria usually obtain a fixed carbon (carbohydrate) by photosynthesis. The lack of photosystem II prevents heterocysts from photosynthesizing, so the vegetative cells provide them with carbohydrates, which is thought to be sucrose. The fixed carbon and nitrogen sources are exchanged through channels between the cells in the filament. Heterocysts maintain photosystem I, allowing them to generate ATP by cyclic photophosphorylation.Single heterocysts develop about every 9-15 cells, producing a one-dimensional pattern along the filament. The interval between heterocysts remains approximately constant even though the cells in the filament are dividing. The bacterial filament can be seen as a multicellular organism with two distinct yet interdependent cell types. Such behavior is highly unusual in prokaryotes and may have been the first example of multicellular patterning in evolution. Once a heterocyst has formed it cannot revert to a vegetative cell. Certain heterocyst-forming bacteria can differentiate into spore-like cells called akinetes or motile cells called hormogonia, making them the most phenotyptically versatile of all prokaryotes.The mechanism of controlling heterocysts is thought to involve the diffusion of an inhibitor of differentiation called patS. Heterocyst formation is inhibited in the presence of a fixed nitrogen source, such as ammonium or nitrate. Heterocyst maintenance is dependent on an enzyme called hetN. The bacteria may also enter a symbiotic relationship with certain plants. In such a relationship, the bacteria do not respond to the availability of nitrogen, but to signals produced by the plant. Up to 60% of the cells can become heterocysts, providing fixed nitrogen to the plant in return for fixed carbon.The following sequences take place in formation of heterocysts from a vegetative cell:The cell enlarges.Granular inclusions decrease.Photosynthetic lammele reorients.The wall finally becomes triple-layered. These three layers develop outside the cell's outer layer.The middle layer is homogeneous.The inner layer is laminated.The senescent heterocyst undergoes vacuolation and finally breaks off from the filament causing fragmentation. These fragments are called hormogonia and undergo asexual reproduction.The cyanobacteria that form heterocysts are divided into the orders Nostocales and Stigonematales, which form simple and branching filaments respectively. Together they form a monophyletic group, with very low genetic variability.

Heterodera longicaudata

* Heterodontosauridae
* Marginocephalia
** Ceratopsia
** Pachycephalosauria

H. cobra

Heterocyclic amine

Heterodiamond

Heterocyclics

Heteroconger lentiginosus

Heterocorys

Heterodontosuchus is a dubious genus of extinct phytosaur. The genus was first described from a fragmentary anterior section of the mandible found from the Henry Mountains in southeastern Utah, USA. More fossils were later found from Arizona. The name Heterodontosuchus refers to the difference in size between anterior and posterior teeth on this mandible. The teeth were compressed antero-posteriorly spaced closely together. The genus is now thought to be synonymous with Nicrosaurus, and the type and only species, H. ganei, is regarded as a nomen dubium due the fragmentary nature of the remains associated with it.

Filipjev, 1934

Heterodictyna viridissima

Dinosauria

Heteroconger longissimus

Heterodon nasicus nasicus

Mollusca

Cast of specimen SAM-PK-K1332, University of California Museum of Palaeontology

Heterodontagama is an extinct genus of iguanian lizard from the early Eocene of India. It belongs to the extinct family Priscagamidae, which is otherwise only known from the Late Cretaceous of Mongolia. The type species Heterodontagama borsukae was named in 2013 from several isolated upper and lower jaws found in an exposure of the Cambay Formation in an open-pit coal mine in Gujarat.Heterodontagama has a distinctively heterodont dentition.

Heterodoxy was the name adopted by a feminist debating group in Greenwich Village in the early 20th century. It was notable for providing a forum for the development of more radical conceptions of feminism than the suffrage and women's club movements of the time.Heterodoxy was founded in 1912 by Marie Jenney Howe, who specified only one requirement for membership: that the applicant "not be orthodox in her opinion". The luncheon club, which started with 25 members, met every two weeks on Saturdays. The club was disestablished in the 1940s. Group members referred to themselves as "Heterodites".The club's members had diverse political views. The membership also included bisexual and lesbian women, in addition to heterosexuals.The group was considered important in the origins of American feminism. Among the notable members were Susan Glaspell, Charlotte Perkins Gilman, and Ida Rauh.Heterodites Alice Kimball, Alison Turnbull Hopkins, Doris Stevens, and Paula Jakobi were arrested in 1917 and 1918 suffrage protests, and served time in the Occoquan Workhouse, jail, or prison psychiatric wards.Heterodoxy meetings were valuable sources of information on the struggles for women's rights for its members. Many non-members addressed the group, including Helen Keller, Margaret Sanger, Emma Goldman, and Amy Lowell.

Heterocyclic compounds, 3-ring

Sub-clades

H. humuli

Heteroconger tricia

*Heterodera schachtii var. avenae (Wollenweber, 1924)

Heterocrossa literata

H. camelopardalis

Heterocyclic amine formation in meat

Heterodontagama

†Redoniidae

Heteroctenis

Heterodontosauriformes (Xu et al., 2006)

Meyrick, 1925

Heteroconger polyzona

Heterocrossa nigromaculata

Heterodoxy (debating group)

Heterodontus japonicus

Heterocyclic compounds, 2-ring

Heterodeltis trichroa is a moth in the Lecithoceridae family. It was described by Meyrick in 1906. It is found in Sri Lanka.The wingspan is about 14 mm. The forewings are dark brown, with the basal third dark purple-fuscous.

Heterocrossa latifasciata

*Heterodera schachtii var. avenae (Mortensen, Rostrup & Kolpen Ravn, 1908)
*Heterodera schachtii subsp. maior (O. Schmidt, 1930)