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mondofacto - Online Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 26/01/2008, UK Words: 116197

hexacosanoic acid
Systemic name for cerotinic acid. ... (05 Mar 2000) ...

hexacosanol
See: ceryl. ... (05 Mar 2000) ...

hexacosyl
Synonym for ceryl ... The hydrocarbon radical, C26H53-, of ceryl alcohol (hexacosanol). ... Synonym: hexacosyl. ... (05 Mar 2000) ...

hexadactyly
The presence of six fingers or six toes on one or both hands or feet. ... Origin: hexa-+ G. Daktylos, finger ... (05 Mar 2000) ...

hexadecanoic acid
Synonym for palmitic acid ... <biochemistry> One of the most widely distributed of fatty acids. ... The palmitoyl residue is one of the common acyl residues of membrane phospholipids. It is also found as a thioester attached to cystein residues on some membrane proteins. The proteins so modified are often transmembrane proteins and the modified …

hexadimethrine
<chemical> N,n,n',n'-tetramethyl-1,6-hexanediamine polymer with 1,3-dibromopropane. Synthetic polymer which agglutinates red blood cells; used as a heparin antagonist. ... Pharmacological action: heparin antagonists. ... Chemical name: 1,6-Hexanediamine, N,N,N',N'-tetramethyl-, polymer with 1,3-dibromopropane ... (12 Dec 1998) ...

hexadiphane
Synonym for prozapine ... 1-(3,3-diphenylpropyl)hexamethyleneimine;an intestinal antispasmodic with choleretic properties. ... Synonym: hexadiphane. ... (05 Mar 2000) ...

Hexadnovirus
A genus in the family Hepadnaviridae, which is the cause of hepatitis B in man and certain animals. ... (05 Mar 2000) ...

hexafluorenium bromide
Hexamethylenebis[fluoren-9-yldimethylammonium bromide];a potentiator for succinylcholine in anaesthesiology by producing a mild nondepolarising neuromuscular blockade; also inhibits plasma cholinesterase. ... (05 Mar 2000) ...

hexahydroxycyclohexane
A member of the vitamin B complex necessary for growth of yeast and of mice, absence from the diet causes hair loss and dermatitis in mice. ... (27 Sep 1997) ...

hexamer
See: virion. ... 2. A complex or compound containing six subunits or moieties (e.g., a protein complex with six polypeptide chains or an oligopeptide with six amino acid residues). ... Origin: hexa-+ G. Meros, part ... (05 Mar 2000) ...

hexameric
Containing six subunits or moieties. ... (05 Mar 2000) ...

hexametazime
A lipophilic substance that readily crosses the blood-brain barrier; combined with 99mTc to produce a radiopharmaceutical for SPECT imaging or cerebral blood flow estimates. ... Synonym: hexamethylpropyleneamine oxime. ... Acronym: HMPAO ... (05 Mar 2000) ...

hexameter
A verse of six feet, the first four of which may be either dactyls or spondees, the fifth must regularly be a dactyl, and the sixth always a spondee. In this species of verse are composed the Iliad of Homer and the aeneid of Virgil. In English hexameters accent takes the place of quantity. 'Leaped like the roe when he hears in the woodland th …

hexamethone bromide
Synonym for hexamethonium chloride ... Hexamethylenebis(trimethylammonium chloride);a ganglionic blocking agent used in the treatment of hypertension, usually in combination with other hypotensive drugs; also used as the bromide and the tartrate. ... Synonym: hexamethone bromide, vegalysen. ... (05 Mar 2000) ...

hexamethonium
<chemical> A nicotinic cholinergic antagonist often referred to as the prototypical ganglionic blocker. It is poorly absorbed from the gastrointestinal tract and does not cross the blood-brain barrier. It has been used for a variety of therapeutic purposes including hypertension but, like the other ganglionic blockers, it has been replaced by …

hexamethonium chloride
Hexamethylenebis(trimethylammonium chloride);a ganglionic blocking agent used in the treatment of hypertension, usually in combination with other hypotensive drugs; also used as the bromide and the tartrate. ... Synonym: hexamethone bromide, vegalysen. ... (05 Mar 2000) ...

hexamethonium compounds
<chemical> Compounds containing the hexamethylenebis(trimethylammonium) cation. Members of this group frequently act as antihypertensive agents and selective ganglionic blocking agents. ... Pharmacological action: antihypertensive agents, ganglionic blockers. ... (12 Dec 1998) ...

hexamethylmelamine
A drug which liberates formaldehyde in an acid urine; used as a urinary antiseptic. ... (05 Mar 2000) ...

hexamethylpropyleneamine oxime
Synonym for hexametazime ... A lipophilic substance that readily crosses the blood-brain barrier; combined with 99mTc to produce a radiopharmaceutical for SPECT imaging or cerebral blood flow estimates. ... Synonym: hexamethylpropyleneamine oxime. ... Acronym: HMPAO ... (05 Mar 2000) ...

hexamidine isethionate
P,p'-(Hexamethylenedioxy)dibenzamidine bis(beta-hydroxyethanesulfonate);a topical antiseptic. ... (05 Mar 2000) ...

hexamine
Synonym for methenamine ... <chemical> An antibacterial agent most commonly used in the treatment of urinary tract infections. Its antibacterial action derives from the slow release of formaldehyde by hydrolysis at acidic pH. ... Pharmacological action: anti-infective agents, urinary. ... Chemical name: 1,3,5,7-Tetraazatricyclo(3.3.1.13,7)decane …

Hexamita
A genus of protozoan flagellates (order Diplomonadida, class Zoomastigophorea), related to Giardia; they are parasitic in the small intestine of many gallinaceous birds and of certain mammals. Hexamita meleagridis is a species that occurs in the turkey, peafowl, pheasant, quail, and Chukkar partridge; it is most pathogenic in turkeys, causing outbr …

hexamitiasis
An infectious catarrhal enteritis of turkeys, quail, Chukkar partridges, and other gallinaceous birds caused by Hexamita meleagridis and manifested as diarrhoea. Adult birds are symptomless carriers, but poults under 10 weeks often are severely affected. ... (05 Mar 2000) ...

hexanes
Six-carbon saturated hydrocarbon group of the methane series. Include isomers and derivatives. Various polyneuropathies are caused by hexane poisoning. ... (12 Dec 1998) ...

hexanoate
Synonym for caproylate ... A salt or ester of caproic acid. ... Synonym: hexanoate. ... (05 Mar 2000) ...

hexanols
Isomeric forms and derivatives of hexanol (c6h11oh). ... (12 Dec 1998) ...

hexanones
6-carbon straight-chain or branched ketones. ... (12 Dec 1998) ...

hexanoyl
Synonym for caproyl ... The acyl radical of caproic acid. ... Synonym: hexanoyl. ... (05 Mar 2000) ...

hexapeptide
A peptide containing six amino acid residues. ... (05 Mar 2000) ...

hexaploidy
See: polyploidy. ... (05 Mar 2000) ...

hexapoda
<zoology> The true, or six-legged, insects; insects other than myriapods and arachnids. ... The Hexapoda have the head, thorax, and abdomen differentiated, and are mostly winged. They have three pairs of mouth organs, viz, mandibles, maxillae, and the second maxillae or labial palpi; three pairs of thoracic legs; and abdominal legs, which are …

hexaxial reference system
The figure resulting if the lines of derivation of the unipolar limb leads of the electrocardiogram are added to the triaxial reference system. ... (05 Mar 2000) ...

hexazonium salts
Diazonium salt's that contain three azo groups. ... (05 Mar 2000) ...

hexestrol
<chemical> 4,4'-(1,2-diethyl-1,2-ethanediyl)bis-phenol. A synthetic oestrogen that has been used as a hormonal antineoplastic agent. ... Pharmacological action: antineoplastic agent, hormonal, oestrogens, non-steroidal. ... Chemical name: Phenol, 4,4'-(1,2-diethyl-1,2-ethanediyl)bis- ... (12 Dec 1998) ...

hexetidine
<chemical> A bactericidal and fungicidal antiseptic. It is used as a 0.1% mouthwash for local infections and oral hygeine. ... Pharmacological action: antifungal agents, anti-infective agents, local. ... Chemical name: 5-Pyrimidinamine, 1,3-bis(2-ethylhexyl)hexahydro-5-methyl- ... (12 Dec 1998) ...

hexitol
<chemistry> Sugar alcohol with six carbon atoms. Natural examples are sorbitol, mannitol. ... (18 Nov 1997) ...

hexobarbital
<chemical> A barbiturate that is effective as a hypnotic and sedative. ... Pharmacological action: gaba modulators, sedatives, barbiturate. ... Chemical name: 2,4,6(1H,3H,5H)-Pyrimidinetrione, 5-(1-cyclohexen-1-yl)-1,5-dimethyl- ... (12 Dec 1998) ...

hexobarbital hydroxylase
<enzyme> Hexobarbital goes to 3-hydroxyhexobarbital ... Registry number: EC 1.14.- ... (26 Jun 1999) ...

hexobarbital oxidase
<enzyme> Hexobarbital is oxidised to ketohexobarbital ... Registry number: EC 1.1.- ... (26 Jun 1999) ...

hexobarbital sodium
Sodium 5-(1-cyclohexen-1-yl)-1,5-dimethylbarbiturate;a barbiturate sedative and hypnotic of short duration. ... (05 Mar 2000) ...

hexobendine
<chemical> N,n'-dimethyl-n,n'-bis[3-(3,4,5-trimethoxybenzoyloxy) propyl]ethylenediamine. A potent vasoactive agent that dilates cerebral and coronary arteries, but slightly constricts femoral arteries, without any effects on heart rate, blood pressure or cardiac output. ... Pharmacological action: vasodilator agents. ... Chemical name: Benzoic …

hexocyclium methylsulfate
N4-(beta-Cyclohexyl-beta-hyd roxy-beta-phenylethyl)-N1-meth ylpiperazine dimethylsulfate;an anticholinergic agent. ... (05 Mar 2000) ...

hexokinase
<enzyme> Enzyme that catalyses the transfer of phosphate from ATP to glucose to form glucose-6 phosphate, the first reaction in the metabolism of glucose via the glycolytic pathway. ... (18 Nov 1997) ...

hexokinase method
The most specific method for measuring glucose in serum or plasma, wherein hexokinase plus ATP transforms glucose to glucose-6-phosphate plus ADP; glucose-6-phosphate is then reacted with NADP and glucose-6-phosphate dehydrogenase to form NADP which is measured spectrophotometrically. ... (05 Mar 2000) ...

hexon
<molecular biology> Subunit of a hexameric structure or with hexameric symmetry, in particular the arrangement of most of the capsomers of Adenoviridae one capsomer surrounded by six others to form the hexon. ... (18 Nov 1997) ...

hexonic acid
The aldonic acid obtained on the oxidation of the aldehyde group of an aldohexose to a carboxylic acid (e.g., gluconic acid from glucose). ... (05 Mar 2000) ...

hexoprenaline
<chemical> Stimulant of adrenergic beta 2 receptors. It is used as a bronchodilator, antiasthmatic agent, and tocolytic agent. ... Pharmacological action: adrenergic beta-agonists, bronchodilator agents, sympathomimetic, tocolytic agents. ... Chemical name: 1,2-Benzenediol, 4,4'-(1,6-hexanediylbis(imino(1-hydroxy-2,1-ethanediyl)))bis- ... (12 De …

hexosamine
The amine derivative (NH2 replacing OH) of a hexose; e.g., glucosamine. ... (05 Mar 2000) ...

hexosaminidase
<enzyme> Enzyme involved in the metabolism of gangliosides. Deficient in Tay Sachs disease. ... (18 Nov 1997) ...

hexosaminidases
<enzyme> Enzymes that catalyze the hydrolysis of n-acylhexosamine residues in n-acylhexosamides. Hexosaminidases also act on glucosides, galactosides, and several oligosaccharides. ... Registry number: EC 3.2.1.- ... (12 Dec 1998) ...

hexosans
Polysaccharides with the general formula (C6H10O5)x which, on hydrolysis, yield hexoses; included are glucosans (glucans), mannans, galactans, and fructosans (fructans). ... Synonym: polyhexoses. ... (05 Mar 2000) ...

hexose
Monosaccharide containing six carbon atoms, for example glucose, galactose, mannose. ... (18 Nov 1997) ...

hexose monophosphate pathway
Synonym for pentose phosphate pathway ... <biochemistry> A pathway of hexose oxidation in which glucose-6-phosphate undergoes two successive oxidations by NADP, the final one being an oxidative decarboxylation to form a pentose phosphate. ... Diverges from this when glucose-6-phosphate is oxidized to ribose 5 phosphate by the enzyme glucose-6 p …

hexose monophosphate shunt
The main metabolic pathway in activated neutrophils, rendering them relatively insensitive to inhibitors of oxidative phosphorylation. Congenital deficiency of the first enzyme in the shunt, glucose 6 phosphate dehydrogenase, produces a sensitivity to infection similar to that seen in chronic granulomatous disease. ... (18 Nov 1997) ...

hexose monphosphate pathway
A metabolic pathway present in a wide range of prokaryotic and eukaryotic microorganisms as well as in plants and animals, it involves the oxidative decarboxylation of glucose-6-phosphate, via 6 phosphogluconate, to ribulose 5-phosphate, followed by a series of reversible, non-oxidative interconversions whereby hexose and triose phosphates are form …

hexose phosphatase
<enzyme> May be an aspect of acid phosphatase, EC 3.1.3.2 ... Registry number: EC 3.1.3.- ... (26 Jun 1999) ...

hexose phosphate synthetase
<enzyme> Ribulosephosphate formaldehyde gives d-erythro-l-glycero-3-hexulose ... Registry number: EC 4.1.2.- ... Synonym: 3-hexulose phosphate synthase, d-arabino-3-hexulose 6-phosphate formaldehyde-lyase, 3-hexulosephosphate synthase, d-arabino-3-hexulose-6-phosphate-lysase, hexulose-6-phosphate synthase, hump synthase ... (26 Jun 1999) ...

hexoseaminidase a
Deficiency of this enzyme causes Tay-Sachs disease, a progressive, fatal neurologic disorder concentrated in people of european jewish (ashkenazi) descent. ... (12 Dec 1998) ...

hexosebisphosphatase
Synonym for fructose 1,6-bisphosphate ... <biochemistry> This key intermediate in glycolysis and gluconeogenesis (a hexose diphosphate) was discovered by Arthur Harden and William Young in 1905. ... In the third step of glycolysis, fructose 6-phosphate and ATP are converted to fructose 1,6-bisphosphate and ADP with the aid of phosphofructokinas …

hexosephosphate isomerase
Synonym for glucose-phosphate isomerase ... <enzyme> An enzyme that catalyses the reversible interconversion of d-fructose 6-phosphate and d-glucose-6-phosphate; a part of glycolysis and gluconeogenesis; glucosephosphate isomerase deficiency is an inherited disorder resulting in liver glycogenesis and haemolytic anaemia. ... Synonym: hexosephos …

hexosyltransferases
<enzyme> Enzymes of the transferase class that catalyze the transfer of a hexose group from one compound to another. ... Registry number: EC 2.4.1.- ... (12 Dec 1998) ...

hexulose
Synonym for ketohexose ... A six-carbon sugar possessing a ketone group; e.g., fructose. ... Synonym: hexulose. ... (05 Mar 2000) ...

hexuronic acid
The uronic acid of a hexose. ... (05 Mar 2000) ...

hexuronic acids
Term used to designate tetrahydroxy aldehydic acids obtained by oxidation of hexose sugars, i.e. Glucuronic acid, galacturonic acid, etc. Historically, the name hexuronic acid was originally given to ascorbic acid. ... (12 Dec 1998) ...

hexylresorcinol
<chemical> A substituted phenol with bacteriocidal properties used as an antiseptic in mouthwashes and skin wound cleansers; it has also been used as an antihelmintic but has largely been replaced by other drugs. ... Pharmacological action: anti-infective agents, local, antinematodal agent, antiplatyhelmintic agents. ... Chemical name: 1,3-Benz …

Hey
William, English surgeon, 1736-1819. ... See: Hey's amputation, Hey's internal derangement, Hey's hernia, Hey's ligament. ... (05 Mar 2000) ...

Hey's amputation
Amputation of the foot in front of the tarsometatarsal joint. ... (05 Mar 2000) ...

Hey's hernia
Synonym for Cooper's hernia ... A femoral hernia with two sacs, the first being in the femoral canal, and the second passing through a defect in the superficial fascia and appearing immediately beneath the skin. ... Synonym: bilocular femoral hernia, Hey's hernia. ... (05 Mar 2000) ...

Hey's ligament
Synonym for superior horn of falciform margin of saphenous opening ... The upper part of the falciform margin of the opening in the fascia lata through which the greater saphenous vein passes. ... Synonym: cornu superius marginalis falciformis, Burns' falciform process, Burns' ligament, Hey's ligament. ... (05 Mar 2000) ...

Heyd's syndrome
<syndrome> Acute renal failure occurring in a patient with liver failure. The exact causal relationship in unclear, but those with alcoholic cirrhosis and alcoholic hepatitis are at greatest risk. ... Symptoms include decreased or absent urine production, jaundice, abdominal swelling, delirium, confusion, nausea and vomiting. Prognosis is very …

Heyer
W.T., U.S. Scientist, *1902. ... See: Heyer-Pudenz valve. ... (05 Mar 2000) ...

Heyer-Pudenz valve
A valve used in the shunting procedure for hydrocephaly; consisting of a catheter-valve system in which the ventricular catheter leads the cerebrospinal fluid into a one-way pump through which the cerebrospinal fluid passes down the distal catheter into the right atrium of the heart. ... (05 Mar 2000) ...

Heyns
O.S., 20th century South African obstetrician. ... See: Heyns' abdominal decompression apparatus. ... (05 Mar 2000) ...

Hf
Symbol for hafnium. ... (05 Mar 2000) ...

Hfla protease
<enzyme> Cii protein of phage lambda cleaving enzyme ... Registry number: EC 3.4.21.- ... (26 Jun 1999) ...

HFR strain
A strain, or clone, in which a conjugative plasmid (such as an F'), integrated in the bacterial genome, is instrumental in the transfer (along with plasmid DNA) of integrated bacterial DNA in a sequential manner to a suitable recipient. ... Origin: high freguency of recombination ... (05 Mar 2000) ...

Hg
Symbol for mercury (hydrargyrum). ... (05 Mar 2000) ...

HG factor
Synonym for glucagon ... A polypeptide hormone (3485 D) secreted by the cells of the Islets of Langerhans in response to a fall in blood sugar levels. Induces hyperglycaemia. A family of structurally related peptides includes glucagon like peptides 1 & 2 (encoded by the same gene), gastric inhibitory polypeptide, secretin, vasoactive intestinal …

HGF
Synonym for hepatocyte growth factor ... <growth factor> Polypeptide mitogen originally shown to cause cell division in hepatocytes. ... In the liver, the main sources of hepatocyte growth factor are nonparenchymal cells. It is now clear that hepatocyte growth factor is a mitogen for a number of cell types and it is found in many cells outside …

HGH
<abbreviation> Human growth hormone. ... See: somatotropin. ... (05 Mar 2000) ...

HGPRT
Synonym for hypoxanthine-guanine phosphoribosyl transferase ... <enzyme> An enzyme which plays an important role in the making of ATP and GTP from guanine -- the only way guanine, adenine, or other purine molecules are able to become part of nucleic acids. Biologists study gene action via the incorporation of modified nitrogenous bases into DN …

hhp1+ kinase
<enzyme> Hhp1+ and hhp2+ are two closely related kinases involved in DNA repair that share significant homology with saccharomyces cerevisiae hrr25p; from schizosaccharomyces pombe; 365 residues, mw 42.5 kD; genbank x78871 ... Registry number: EC 2.7.1.- ... Synonym: hhp1+ gene product, hhp1 ... (26 Jun 1999) ...

hhp2+ kinase
<enzyme> Hhp1+ and hhp2+ are two closely related kinases involved in DNA repair that share significant homology with saccharomyces cerevisiae hrr25p; from schizosaccharomyces pombe; 401 residues, mw 45.8 kD; genbank x78872 ... Registry number: EC 2.7.1.- ... Synonym: hhp2+ gene product, hhp2 ... (26 Jun 1999) ...

HHS
The Department of Health and Human Services of the United States government has jurisdiction over public health, welfare and civil rights issues and is the highest level government body with such jurisdiction. Agencies under hhs include the public health service (phs) and the social security administration. ... (12 Dec 1998) ...

HHV
See Higher heating value. ... (05 Dec 1998) ...

hi test
<epidemiology> Haemagglutination inhibition test, a serological test used to detect antibodies specific to a particular family of viruses which possess the ability to agglutinate red blood cells e.g. Measles, rubella and influenza. ... (05 Dec 1998) ...

hiatal
Relating to a hiatus. ... (05 Mar 2000) ...

hiatal hernia
<gastroenterology, surgery> A type of hernia that occurs when a portion of the stomach protrudes through the diaphragm (where the oesophagus normally passes through). Obesity and smoking are considered risk factors. Hiatal hernia is often associated with reflux oesophagitis. ... Symptoms include heartburn, difficulty swallowing, chest pain and …

hiatus
An aperture, opening, or foramen. ... Origin: L. An aperture, fr. Hio, pp. Hiatus, to yawn ... (05 Mar 2000) ...

hiatus adductorius
An alternate term for adductor hiatus. ... (05 Mar 2000) ...

hiatus aorticus
Synonym for aortic hiatus ... The opening in the diaphragm bounded by the two crura, the vertebral column, and the median arcuate ligament, through which pass the aorta and thoracic duct. ... Synonym: hiatus aorticus, aortic foramen, aortic opening. ... (05 Mar 2000) ...

hiatus canalis facialis
Synonym for hiatus of facial canal ... The opening on the anterior aspect of the petrous part of the temporal bone which leads to the facial canal and gives passage to the greater petrosal nerve. ... Synonym: hiatus canalis nervi petrosi majoris, fallopian hiatus, Ferrein's foramen, hiatus canalis facialis, hiatus of canal for greater petrosal nerve. …

hiatus ethmoidalis
Synonym for semilunar hiatus ... A deep, narrow groove in the lateral wall of the middle meatus of the nasal cavity, into which the maxillary sinus, the frontonasal duct, and the middle ethmoid cells open. ... Synonym: hiatus semilunaris, hiatus ethmoidalis. ... (05 Mar 2000) ...

hiatus hernia
Protrusion of the stomach up into the opening normally occupied by the oesophagus in the diaphragm, the muscle that separates the chest (thoracic) cavity from the abdomen. Hiatus in latin means an opening. ... (12 Dec 1998) ...

hiatus maxillaris
Synonym for maxillary hiatus ... The large opening into the maxillary sinus on the nasal surface of the maxilla. ... Synonym: hiatus maxillaris. ... (05 Mar 2000) ...

hiatus oesophageus
Synonym for oesophageal hiatus ... The opening in the right crus of the diaphragm, between the central tendon and the hiatus aorticus, through which pass the oesophagus and the two vagus nerves. ... Synonym: hiatus oesophageus, oesophageal opening. ... (05 Mar 2000) ...

hiatus of facial canal
The opening on the anterior aspect of the petrous part of the temporal bone which leads to the facial canal and gives passage to the greater petrosal nerve. ... Synonym: hiatus canalis nervi petrosi majoris, fallopian hiatus, Ferrein's foramen, hiatus canalis facialis, hiatus of canal for greater petrosal nerve. ... (05 Mar 2000) ...

hiatus sacralis
Synonym for sacral hiatus ... A normally-occurring gap at the lower end of the sacrum, exposing the vertebral canal, due to failure of the laminae of the last sacral segment to coalesce. It is closed by the sacrococcygeal ligament, and provides cannular access to the sacral epidural space for administration of anaesthetics (caudal nerve blocks). ... …

hiatus saphenus
Synonym for saphenous opening ... The opening in the fascia lata inferior to the medial part of the inguinal ligament through which the saphenous vein passes to enter the femoral vein. ... Synonym: hiatus saphenus, fossa ovalis, saphenous hiatus. ... (05 Mar 2000) ...