| ¿µ¹® | pH, hydrogen ion concentration | ÇÑ±Û | ¼ö¼ÒÀ̿³óµµÁö¼ö |
|---|---|---|---|
| ¼³¸í | Ç÷¾×À̳ª ¼Òº¯¿¡¼ ½Ç½ÃÇÏ´Â °Ë»çÇ׸ñ. pH°Ë»ç´Â ÀÎüÀÇ Ã¼¾×ÀÇ »ê¼º, ¾ËÄ®¸®¼ºÀ» ¾Ë¾Æº¸´Â Áß¿äÇÑ °Ë»çÀÌ´Ù. ÀÎü´Â ¾à¾ËÄ®¸®¼º¿¡ ¼ÓÇϳª, À̺¸´Ù pHÀÇ Áõ°¡³ª °¨¼Ò°¡ ³ªÅ¸³¯ °æ¿ì, »ý¸í¿¡ À§ÇèÀÌ ¹ß»ýÇÑ´Ù. ÀÎü³»¿¡´Â ÀÌ·± »êµµÀÇ Áõ°¨À» ¸·±âÀ§ÇØ, À̸¥¹Ù ¿ÏÃæÁ¦µéÀÌ ¸¹ÀÌ Á¸ÀçÇϸç, ƯÈ÷ ÇãÆÄ¿Í ÄáÆÏÀÌ ¿ÏÃæÀÛ¿ëÀ» ¼öÇàÇÏ´Â ÁÖ¿ä±â°üÀÌ´Ù. ÄáÆÏÀº »êµµ°¡ ³ôÀ» °æ¿ì, ¼Òº¯¿¡¼ »êµµ¸¦ Áõ°¡½ÃÄÑ ¹èÃâÇÔÀ¸·Î½á Ç÷¾×³»ÀÇ ¾ËÄ®¸®¼º ³óµµ°¡ Áõ°¡Çϵµ·Ï ÇÑ´Ù. ¶ÇÇÑ ÇãÆÄ¿¡¼µµ, Ç÷¾×³»¿¡ »êµµ°¡ Áõ°¡½Ã È£ÈíÀ» Áõ°¡ÇÔÀ¸·Î½á ¹ÛÀ¸·Î »êÀÇ ¹èÃâÀ» Áõ°¡½ÃŲ´Ù. ÀÌ·± ÇãÆÄ¿Í ÄáÆÏÀÇ ±ÕÇüÀº ¾ÆÁÖ ÀûÀýÈ÷ ÀÌ·ç¾îÁö°í ÀÖÀ¸¸ç, ¾î´À ÇÑ ±â°üÀÇ ÀÌ»óÀÌ ¹ß»ýÇϸé, ÀÌ·± ±ÕÇüÀº ±ú¾îÁö±â ½±´Ù. |
||
| HCN | Hydrogen Cyanide; û»ê |
|---|---|
| H2S | Hydrogen Sulfate; Ȳȼö¼Ò |
| pH | ¼ö¼ÒÀ̿³óµµÁö¼ö; Hydrogen Ion or Degree of Acidity; ¼ö¼ÒÁö¼ö, »êµµ |
| APNH | antiporter sodium-hydrogen ion |
| BAHS | butoctamide hydrogen succinate |
| BHT | Breath hydrogen test |
|---|---|
| H | Hydrogen |
| H2 | Hydrogen |
| H2O2 | Hydrogen Peroxide |
| HCN | Hydrogen cyanide |
hydrogen bond (¼ö¼Ò °áÇÕ
hydrogen bond (¼ö¼Ò °áÇÕ
| hydrogen | <chemistry, element> Hydrogen is a gas element which has an atomic number of 1 and an atomic weight of 1.0079. It combines with oxygen to form water (H20) and is present in all organic compounds. A few types of bacteria can metabolise atmospheric hydrogen (H2). Hydrogen gas itself is not poisonous, but when it mixes with air it can easily ignite or explode. Hydrogen was discovered by Henry Cavendish in 1766 and was named by Lavoisier. There are two main isotopes of hydrogen: deuterium (2H) and tritium (3H, which is radioactive and is used in some glow-in-the-dark paints and as a tracer in biological studies). Abbreviation: H (09 Oct 1997) |
|---|---|
| hydrogen acceptor | A molecule that, in conjunction with a tissue enzyme system, carries hydrogen from one metabolite (oxidant) to another (reductant) or to molecular oxygen to form H2O. Synonym: hydrogen acceptor. (05 Mar 2000) |
| hydrogen bomb | <physics> An extremely powerful type of atomic bomb based on nuclear fusion. The atoms of heavy isotopes of hydrogen (deuterium and tritium) undergo fusion when subjected to the immense heat and pressure generated by the explosion of a nuclear fission unit in the bomb. (09 Oct 1997) |
| hydrogen bond | <chemistry> A weak electrostatic link between an electronegative atom (such asoxygen) and a hydrogen atom which is linked covalently to anotherelectronegative atom, hydrogen bonding is what makes water stick toitself. (09 Oct 1997) |
| hydrogen bonding | A low-energy attractive force between hydrogen and another element. It plays a major role in determining the properties of water, proteins, and other compounds. (12 Dec 1998) |
| hydrogen bromide | HBr;a colourless gas that has a very irritating odour and fumes in moist air; in aqueous solution, it is hydrobromic acid. Hydrogen chloride, HCl;a very soluble gas which, in solution, forms hydrochloric acid. (05 Mar 2000) |
| hydrogen carrier | A molecule that, in conjunction with a tissue enzyme system, carries hydrogen from one metabolite (oxidant) to another (reductant) or to molecular oxygen to form H2O. Synonym: hydrogen acceptor. (05 Mar 2000) |
| hydrogen cyanide | <chemical> Hydrogen cyanide (hcn). A toxic liquid or colourless gas. It is found in the smoke of various tobacco products and released by combustion of nitrogen-containing organic materials. Pharmacological action: poisons. Chemical name: Hydrocyanic acid (12 Dec 1998) |
| hydrogen dehydrogenase | <enzyme> Hoxf, hoxh, hoxu, and hoxy from rhodococcus opacus encode the alpha-, beta-, gamma-, and delta-subunits, respectively Registry number: EC 1.12.1.2 Synonym: hydrogen-nad+ oxidoreductase, nad-reducing hydrogenase, hoxf gene product, hoxu gene product, hoxy gene product, hoxh gene product (26 Jun 1999) |
| hydrogen dioxide | <chemical> Hydrogen peroxide is produced by vertebrate phagocytes and is used in bacterial killing (the myeloperoxidase halide system). (05 May 1997) |
| hydrogen donor | A metabolite from which hydrogen is removed (by a dehydrogenase system) and transferred by a hydrogen carrier to another metabolite, which is thus reduced. (05 Mar 2000) |
| hydrogen electrode | The ultimate standard of reference in all pH determinations, limited and technically difficult to use, consisting of a piece of spongy platinum black partly immersed in a solution in a small glass tube; the tube above the solution is filled with hydrogen gas that is bubbled through the solution and absorbed by the platinum; the electrode thus measures the potential between H2 and H+, the "standard" potential of which (1 atmosphere, 1 molar) is taken as zero; hence, the hydrogen electrode potential measures [H+] or pH. (05 Mar 2000) |
| hydrogen embrittlement | <physics> A decrease in the fracture strength of metals (embrittlement) due to the incorporation of hydrogen within the metal lattice. (09 Oct 1997) |
| hydrogen exponent | The logarithm of the hydrogen ion concentration in blood or other fluid; its negative is the pH of that fluid. (05 Mar 2000) |
| hydrogen ion | A hydrogen atom minus its electron and therefore carrying a unit positive charge (i.e., a proton); in water, it combines with a water molecule to form hydronium ion, H3O+. (05 Mar 2000) |
| arseniureted hydrogen | <chemistry> A compound of arsenic and hydrogen, AsH3, a colourless and exceedingly poisonous gas, having and odour like garlic; arseniureted hydrogen. Origin: From Arsenic. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| phosphureted hydrogen | <chemistry> A colourless gas, PH3, analogous to ammonia, and having a disagreeable odour resembling that of garlic. Synonym: hydrogen phosphide, and formerly, phosphureted hydrogen. It is the most important compound of phosphorus and hydrogen, and is produced by the action of caustic potash on phosphorus. It is spontaneously inflammable, owing to impurities, and in burning produces peculiar vortical rings of smoke. Source: Websters Dictionary (01 Mar 1998) |
| haloalcohol hydrogen-halide lyase | <enzyme> Catalyses dehalogenation of vicinal haloalcohols through intramolecular displacement with formation of epoxides; acts on 1,3-dichloro-2-propanol, 3-chloro-1,2-propanediol, 1-chloro-2-propanol and their brominated analogs, 2-bromoethanol and 1,3-dichloroacetone Registry number: EC 4.5.1.- Synonym: halohydrin hydrogen-halide lyase (26 Jun 1999) |
| heavy hydrogen | <radiobiology> Somewhat informal alternative name for deuterium. See: deuterium. (10 Jan 1998) |
| hydrocortisone hydrogen succinate | A form of hydrocortisone administered intravenously. (05 Mar 2000) |
| sodium-hydrogen antiporter | A plasma membrane exchange glycoprotein transporter that functions in intracellular pH regulation, cell volume regulation, and cellular response to many different hormones and mitogens. (12 Dec 1998) |
| sodium hydrogen carbonate | <chemical> Carbonic acid monosodium salt (CHNaO3). A white, crystalline powder that is used as an electrolyte replenisher and systemic alkaliser. It is applied topically in solution to wash the nose, mouth, or vagina, and as a cleansing enema. Pharmacologic action: Acid neutralization. Uses: Preexisting metabolic acidosis, hyperkalemia, tricyclic or phenobarbital overdose. Dose in mEq: 0.3 * (base deficit) * (wt in kg). Potential complications: Metabolic alkalosis, hypercarbia, hyperosmolar state. Note: Since HCO3- does not cross cell membranes and CO2 does, the administration of bicarbonate may actually make tissues more acidotic. Chemical name: Carbonic acid monosodium salt. (12 Mar 2000) |
| sodium hydrogen sulfite | NaHSO3;acid sodium sulfite, used in gastric and intestinal fermentation, externally in the treatment of parasitic diseases, and as an antioxidant in certain injections (s. Metabisulfite). Synonym: sodium hydrogen sulfite, sodium pyrosulfite. (05 Mar 2000) |
| sulfureted hydrogen | <chemical> Hydrogen sulfide (h2s). A flammable, poisonous gas with a characteristic odour of rotten eggs. It is used in the manufacture of chemicals, in metallurgy, and as an analytical reagent. Chemical name: Hydrogen sulfide (H2S) (12 Dec 1998) |
| interspecies hydrogen transfer | <biology, ecology> The process in which organic matter is degraded anaerobically by the interaction of several groups of microorganisms in which hydrogen production and hydrogen consumption are closely coupled among species. (09 Oct 1997) |
| 3-chloro-D-alanine hydrogen chloride-lyase | <enzyme> Pseudomonas putida enzyme; forms cysteine from 3-chloro-d-alanine and hydrogen sulfide Registry number: EC 4.5.- Synonym: cahc-lyase, 3-chloro-d-alanine chloride-lyase (deaminating) (26 Jun 1999) |
| formate hydrogen lyase | <enzyme> Consists of EC 1.2.1.2, formate dehydrogenase, plus EC 1.12.1.2, hydrogen dehydrogenase Registry number: EC 1.- Synonym: formate dehydrogenase h, fdhh gene product, fdhf gene product, hyc gene product (26 Jun 1999) |
Synonyms :
Synonyms : Bonding, Hydrogen, Bondings, Hydrogen, Hydrogen Bondings
Synonyms : Zyklon B, Acid, Hydrocyanic, Cyanide, Hydrogen
Synonyms : Hydrogen Peroxide (H2O2), Hydroperoxide, Oxydol, Perhydrol, Superoxol, Peroxide, Hydrogen
Synonyms : Hydrogen Sulfide (H2(Sx)), Hydrogen Sulfide (H2S2), Hydrogen Sulfide (H2S3), Sulfide, Hydrogen
| hydrogen |
a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
Ãâó: wordnet.princeton.edu/perl/webwn
|
|---|---|
| hydrogen cyanide |
a highly poisonous gas or volatile liquid that smells like bitter almonds; becomes a gas at around 90 degree Fahrenheit and is most dangerous when inhaled; the anhydride of hydrocyanic acid; used in manufacturing
Ãâó: wordnet.princeton.edu/perl/webwn
|
| hydrogen bond |
a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond
Ãâó: wordnet.princeton.edu/perl/webwn
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| hydrogen iodide |
a colorless gas that yields hydroiodic acid in aqueous solution
Ãâó: wordnet.princeton.edu/perl/webwn
|
| hydrogen ion |
a positively charged atom of hydrogen; that is to say, a normal hydrogen atomic nucleus
Ãâó: wordnet.princeton.edu/perl/webwn
|
| hydrogen | a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas |
|---|---|
| hydrogen | an atom of hydrogen |
| hydrogen | a colorless explosive liquid that is volatile and poisonous and foul-smelling |
| hydrogen | a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium |
| hydrogen | a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond |
| hydrogen | a colorless gas that yields hydrobromic acid in solution with water |
| hydrogen | a salt of carbonic acid in which one hydrogen atom has been replaced |
| hydrogen | a colorless corrosive gas: HCl |
| hydrogen | a weak poisonous acid (HCN) used in fumigating and in synthesis of organic compounds |
| hydrogen | a colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride |
| hydrogen | a colorless gas that yields hydroiodic acid in aqueous solution |
| hydrogen | a positively charged atom of hydrogen |
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