| HPS | Hantavirus pulmonary syndrome; hematoxylin, phloxin, and saffron; Hermansky-Pudlak syndrome; high-pr... |
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| hisingerite | <chemical> A soft black, iron ore, nearly earthy, a hydrous silicate of iron. Origin: Named after W. Hisinger, a Swedish mineralogist. Source: Websters Dictionary (01 Mar 1998) |
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| hispanic americans | Persons living in the united states of mexican (mexican americans), puerto rican, cuban, central or south american, or other spanish culture or origin. The concept does not include brazilian americans or portuguese americans. (12 Dec 1998) |
| hispid | Bearing stiff, bristly hairs. (09 Oct 1997) |
| hispid flagella | Eukaryotic flagella with two rows of stiff protrusions (mastigonemes) at right angles to the long axis of the shaft. In hispid flagella, the normal relationship between the direction of flagellar wave propagation and the direction of movement is reversed, a proximal to distal wave pulls the organism forward. (18 Nov 1997) |
| hispidulous | <botany> Minutely hispid. Origin: Dim. Of hispid. Source: Websters Dictionary (01 Mar 1998) |
| hiss | 1. To make with the mouth a prolonged sound like that of the letter s, by driving the breath between the tongue and the teeth; to make with the mouth a sound like that made by a goose or a snake when angered; especially, to make such a sound as an expression of hatred, passion, or disapproval. "The merchants among the people shall hiss at thee." (Ezek. Xxvii. 36) 2. To make a similar noise by any means; to pass with a sibilant sound; as, the arrow hissed as it flew. "Shod with steel, We hissed along the polished ice." (Wordsworth) Origin: AS. Hysian; prob. Of imitative origin; cf. LG. Hissen, OD. Hisschen. 1. A prolonged sound like that letter s, made by forcing out the breath between the tongue and teeth, especially. As a token of disapprobation or contempt. ""Hiss" implies audible friction of breath consonants." (H. Sweet) "A dismal, universal hiss, the sound Of public scorn." (Milton) 2. Any sound resembling that above described; as: The noise made by a serpent. "But hiss for hiss returned with forked tongue." (Milton) The note of a goose when irritated. The noise made by steam escaping through a narrow orifice, or by water falling on a hot stove. Source: Websters Dictionary (01 Mar 1998) |
| Hiss' stain | <technique> A stain for demonstrating the capsules of microorganisms, using gentian violet or basic fuchsin followed by a copper sulphate wash. (05 Mar 2000) |
| Hiss, Philip | <person> U.S. Bacteriologist, 1868-1913. See: Hiss' stain. (05 Mar 2000) |
| histadine | <biochemistry> Is intricately involved in a large number of critical metabolic processes, ranging from the production of red and white blood cells to regulating antibody activity. Histadine also helps to maintain the myelin sheaths which surround and insulate nerves. In particular, Histidine has been found beneficial for the auditory nerves and a deficiency of this vital amino acid has been noted in cases of nerve deafness. Histadine is required for the production of histamine and is often used in the treatment of anaemia, allergies, rheumatoid arthritis and other inflammatory reactions. Histadine also possesses vasodilating and hypotensive actions and has an vital role in sexual responses. Research shows that the release of histamine from the mast cells is necessary for the physical action of orgasm. Women who are unable to achieve orgasm may be low in histamine and can possibly benefit from histidine supplementation. Premature ejaculation is also attributed to excess histamine and may be regulated by using methionine and calcium. Studies show that histidine boosts the activity of suppressor T-cells. One researcher reporting the finding of abnormally low levels of Histidine in the blood of patients with rheumatoid arthritis. Histidine is also used as a chelating agent in some cases of arthritis and to treat tissue overload from copper, iron or other heavy metals, to remove them from the body. Histadine also acts as an inhibitory neurotransmitter, boosting the activity of soothing alpha waves in the brain and suporting resistant to the effects of anxiety and stress. In cases of histidine deficiency, there is an unbalancing effect on alpha rhythms, leading to greater beta wave production. Beta waves are responsible for brain activity leading to anger and tension. Histidine is naturally found in most animal and vegetable proteins and is especially high in pork, poultry, cheese and wheat germ. Supplements of histidine should not be larger than 1.5 grams per day, except under a doctors supervision. (22 May 1997) |
| Histalog test | A test for measurement of maximal production of gastric acidity or anacidity; it is similar to the histamine test, but uses Histalog (betazole hydrochloride), an analogue of histamine. Synonym: maximal Histalog test. (05 Mar 2000) |
| histaminaemia | The presence of histamine in the circulating blood. Origin: histamine + G. Haima, blood (05 Mar 2000) |
| histaminase | amine oxidase (copper-containing) |
| histamine | <biochemistry> Formed by decarboxylation of histidine. Potent pharmacological agent acting through receptors in smooth muscle and in secretory systems. Stored in mast cells and released by antigen. (See hypersensitivity). Responsible for the early symptoms of anaphylaxis. Also present in some venoms. (18 Nov 1997) |
| histamine agents | Drugs used for their actions on histaminergic systems. Included are drugs that act at histamine receptors, affect the life cycle of histamine, or affect the state of histaminergic cells. (12 Dec 1998) |
| histamine agonist | Drugs that bind to and activate histamine receptors. Although they have been suggested for a variety of clinical applications histamine agonists have so far been more widely used in research than therapeutically. (12 Dec 1998) |
Synonyms : Antagonists, Histamine H1, Antagonists, Histamine H1 Receptor, Blockaders, Histamine H1 Receptor, H1 Receptor Blockaders, Histamine H1 Blockers, Receptor Blockaders, H1, Blockaders, H1 Receptor, Blockers, Histamine H1, Classical Antihistamines
Synonyms : H1 Antihistamines, Non-Sedating, Second Generation Antihistamines, Second Generation H1 Antagonists, Antihistamines, Second Generation, H1 Antihistamines, Non Sedating, Histamine H1 Antagonists, Non Sedating, Non-Sedating H1 Antihistamines
Synonyms : Antagonists, Histamine H2, Blockaders, Histamine H2 Receptor, H2 Receptor Blockaders, Histamine H2 Blockers, Receptor Antagonists, Histamine H2, Receptor Blockaders, H2, Blockaders, H2 Receptor, Blockers, Histamine H2, H2 Antagonists, Histamine
Synonyms : Histamine N Methyltransferase, Methyltransferase, Histamine, N-Methyltransferase, Histamine
Synonyms : Histamine Liberations, Histamine Releases
| histiocytosis |
a blood disease characterized by an abnormal multiplication of macrophages
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| histocompatibility |
condition in which the cells of one tissue can survive in the presence of cells of another tissue; "a successful graft or transplant requires a high degree of histocompatibility"
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| histogram |
a bar chart representing a frequency distribution; heights of the bars represent observed frequencies
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| histologist |
anatomist who specializes in the microscopic study of animal tissues
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| histology |
the branch of biology that studies the microscopic structure of animal or plant tissues
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| HIS | move with a whooshing sound |
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| HIS | someone who communicates disapproval by hissing |
| HIS | a fricative sound (especially as an expression of disapproval) |
| HIS | like a sustained `s' |
| HIS | enzyme that acts as a catalyst in converting histidine to histamine |
| HIS | amine formed from histidine that stimulates gastric secretions and dilates blood vessels |
| HIS | a medicine used to treat the gastric effects of histamine in cases of peptic ulcers and gastritis and gastroesophageal reflux |
| HIS | a headache associated with the release of histamine from cells |
| HIS | an essential amino acid found in proteins that is important for the growth and repair of tissue |
| HIS | a macrophage that is found in connective tissue |
| HIS | leukemia characterized by the proliferation of monocytes and monoblasts in the blood |
| HIS | leukemia characterized by the proliferation of monocytes and monoblasts in the blood |