GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW) | ||||||
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22:35 Jan 13, 2003 |
Russian to English translations [PRO] Tech/Engineering | |||||||
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| Selected response from: Jack slep Local time: 16:35 | ||||||
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carbonic acid and bicarbonate [ion] Explanation: I believe that HCO3 is what is called "free carbonic acid" here. Acid Base Physiology Under normal conditions, body fluids are maintained at a pH between 7.35 and 7.45; excursions out of this range constitute acidosis (low pH) and alkalosis (high pH). The main buffer present in the body is bicarbonate. Bicarbonate exists in equilibrium with carbonic acid which in turn can be converted to carbon dioxide and water. H2O + CO2 H2CO3 H+ + HCO3- Other, weaker buffers exist in equilibrium with the bicarbonate system, so if you know where you are with bicarbonate, you have a good handle on the acid-base state of the body. Bicarbonate is such a good buffer (and hold the pH steady despite addition or subtraction of protons) for several reasons. A buffer is strongest near it's pKa. The pKa of bicarbonate is 6.1 which is close to 7.4 than most other major bases in the body. Also, at the left side of the bicarbonate system is carbon dioxide, a gas which can be dumped via the lungs. Thus, the body can fine tune its acid-base status by affecting either bicarbonate levels (via the kidneys) or carbon dioxide (via the lungs). When something goes wrong with either system, it is reflected in an acid-base abnormality. The relative amounts of carbonic acid and bicarbonate ion determine the pH according to the Henderson-Hasselbach equation; if any two terms are known, the third can be calculated. This equation addresses the right-half of the above equilibrium: H2CO3 H+ + HCO3- -------------------------------------------------- Note added at 2003-01-14 02:22:06 (GMT) -------------------------------------------------- Bicarbonate ion is colloquially often called free carbonic acid. The fact is that it\'s an ion, and it can only exist in solution where the real carbonic acid, H2C03, is present. The latter forms a free ion (free carbonic acid) because of dissociation. I think that the bicarbonate ion is a more scientific term, and, based on the passage you provided, it is a science-related text. -------------------------------------------------- Note added at 2003-01-14 02:26:12 (GMT) -------------------------------------------------- or, simply - carbonic acid and bicarbonate, without the ion |
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free and bicarbonate carbonic acid Explanation: See examples below: ... 1. Purpose The purification plant is to remove free carbonic acid or organic chlorine compounds in the underground water drawn up from the water vein as ... nett21.unep.or.jp/JSIM_DATA/WATER/ WATER_1/html/Doc_224.html [PDF]2 + HO H CO HCO + H+ File Format: PDF/Adobe Acrobat - View as HTML ... H + + HCO 3- H 2 CO 3 Hydrogen ion Bicarbonate Carbonic acid * Carbonic anhydrase then breaks apart the carbonic acid into carbon dioxide and water. ... education.adam.com/products/ipie/iguide/ Acid_Base_Homeostasis_p3.pdf -------------------------------------------------- Note added at 2003-01-14 14:00:02 (GMT) -------------------------------------------------- BUFFERS ... Buffer system of human body. ****bicarbonate carbonic acid. HCO 3 - H 2 CO 3. ... HCO 3 - + H + ---- H 2 CO 3 ----- CO 2 + H 2 O. bicarbonate carbonic acid exhale. ... iweb.tntech.edu/bjackson/Chem1020/ Notes1020/buffers_n1.htm PHYSIOLOGICAL BUFFERS Purpose: maintain aicd-base balance in living system Buffer system of human body. *****bicarbonate carbonic acid HCO3- H2CO3 see above |
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Free carbonic acid and bicarbonic acid Explanation: Free carbonic acid + Plankton: Статья об очищении питьевой воды www.edu.city.kyoto.jp/hp/murasaki/document/ libraryData/GlobalProject1999/tatsuno.htm Chemical Composition for a comfortable water quality Items Target values Manganese 0.01mg/l and less Aluminum 0.2mg/l and less Residual chlorine about 1mg/l and less The intensity of smell 3mg/l and less Free carbonic acid 20mg/l and less Organic matters etc 3mg/l and less Evaporative residue 10mg/l and more, 100mg/l and less Calcium, Magnesium,etc 30mg/l and more, 200mg/l and less Bicarbonic acid: www.iptq.com/cc3.htm |
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carbonate in free and bicarbonic form Explanation: Вряд ли нужно писать подробно bicarbonic acid - carbonate, на мой взгляд, вполне достаточно |
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Free molecules of carbonic acid and bicarbonate anions (ions). Explanation: В принципе согласна с первым ответчиком, кроме некоторых химических подробностей. Comments: Carbonic acid is H2CO3. Bicarbonate ion is HCO3(-). Bicarbonic acid is an incorrect term. свободная углекислота means that there are free molecules of H2CO3 in the water; бикарбонатная углекислота is a Russian slang (should not be translated literally) and means that there are HCO3(-) bicarbonate anions of dissociated weak carbonic acid in the water. |
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