| high enema | An enema instilled high up into the colon. Synonym: enteroclysis. (05 Mar 2000) |
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| high energy bond | <chemistry> Chemical bonds that release more than 25kJ/mol on hydrolysis: their importance is that the energy can be used to transfer the hydrolysed residue to another compound. The risk in using the term is that students may think the bond itself is different in some way, whereas it is the compound that matters. Hydrolysis of creatine phosphate yields 42.7kJ/mol, of phosphoenolpyruvate, 53.2, ATP to ADP, 30.5: the latter is important because it shows that energetically the hydrolysis of creatine phosphate will suffice to reconstitute ATP, hence the use of creatine phosphate in muscle. (18 Nov 1997) |
| high energy compounds | Classically, a group of phosphoric esters whose hydrolysis takes place with a standard free energy change of -5 to -15 kcal/mol (or, -20 to -63 kJ/mol) (in contrast to -1 to -4 kcal/mol or, -4 to -17 kJ/mol) for simple phosphoric esters like glucose-6-phosphate or alpha-glycerophosphates), thus being capable of driving energy-consuming reactions in living cells or reconstituted cell-free systems; adenosine 5'-triphosphate, with respect to the beta-and gamma-phosphates, is the best known and is regarded as the immediate energy source for most metabolic syntheses. The general types are acid anhydrides, phosphoric esters of enols, phosphamic acid (R-NH-PO3H2) derivatives, acyl thioesters (e.g., of coenzyme A), sulfonium compound's (R3-S+), and aminoacyl esters of ribosyl moieties. See: high energy phosphates. (05 Mar 2000) |
| high energy particle generating unit | A machine capable of providing highly energised radiation for the purposes of radiotherapy treatment. (16 Dec 1997) |
| high energy phosphate bond | See: high energy phosphates. (05 Mar 2000) |
| high energy phosphates | Those phosphate's that, on hydrolysis, yield an unusually large amount of energy; e.g., nucleotide polyphosphates such as ATP, enol phosphate's such as phosphoenolpyruvate. See: high energy compounds. Synonym: energy-rich phosphates. (05 Mar 2000) |
| high extinction microscopy | <technique> Polarized-light, interference, fluorescence, and other modes of microscopy using polarization rectifiers and other devices to achieve a high degree of back- ground extinction in order to bring out the signal originating from a very small degree of birefringence, optical path difference, fluorescence etc. (05 Aug 1998) |
| high forceps delivery | Delivery by forceps applied to the foetal head before engagement has taken place. (05 Mar 2000) |
| high frequency current | An alternating electric current having a frequency of 10,000 or more per second; it produces no muscular contractions and does not affect the sensory nerves. Synonym: d'Arsonval current, Tesla current. (05 Mar 2000) |
| high frequency deafness | Selective loss of hearing acuity for high frequencies, usually associated with neurosensory damage; common in acoustic trauma. (05 Mar 2000) |
| high frequency recombination strain | A type of bacterial strain which is able to pass on genetic information to neighboring bacteria at a high rate. The high-frequency recombination strain (Hfr) is able to do this because it possesses the f plasmid and can therefore initiate bacterial conjugation. (09 Oct 1997) |
| high frequency transduction | Specialised transduction in which the donor bacterium contains not only the transducing, defective probacteriophage but also nondefective prophage that serves as "helper" virus, enabling most of the defective prophage particles to develop sufficiently to function as transducing agents. (05 Mar 2000) |
| high lip line | The greatest height to which the lip is raised in normal function or during the act of smiling broadly. (05 Mar 2000) |
| high lithotomy | Lithotomy in which the bladder is entered by an incision immediately above the symphysis pubis. Synonym: high lithotomy. (05 Mar 2000) |
| high mannose oligosaccharide | <biochemistry> A subset of the N glycan chains that are added post translationally to certain asparagine residues of secreted or membrane proteins in eukaryotic cells, contain 5-9 mannose residues, but lack the sialic acid terminated antennae of the so called complex type. (18 Nov 1997) |
Synonyms : High Frequency Jet Ventilation, High-Frequency Jet Ventilations, Jet Ventilation, High-Frequency, Jet Ventilations, High-Frequency, Ventilation, High-Frequency Jet, Ventilations, High-Frequency Jet
Synonyms : High Frequency Oscillation, High Frequency Positive Pressure Ventilation, High Frequency Ventilation, Ventilation, High Frequency, High Frequency Oscillations, High Frequency Ventilations, High-Frequency Oscillations, High-Frequency Ventilations
Synonyms : Activities, Higher Nervous, Activity, Higher Nervous, Higher Nervous Activities, Nervous Activities, Higher, Nervous Activity, Higher
| high-performance liquid chromatography |
high-pressure liquid chromatography, (HPLC) a type of automated chromatography in which the mobile phase is a liquid, which is forced under high pressure through a column packed with a sorbent. As in gas chromatography, a detector at the end of the column coupled to a chart recorder graphs the sample efflux. Various separation methods, including adsorption, gel filtration, ion-exchange, and partition, are used.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| high energy bond |
a chemical bond the hydrolysis of which yields high levels of free energy; such bonds involve phosphate (high energy phosphate b.) or sulfur (high energy sulfur b.) or other mixed anhydride types of chemical structures.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| high energy phosphate bond |
a high energy bond containing phosphate, occurring in ATP, phosphocreatine, phosphoenolpyruvate, and other phosphate-containing high energy compounds; see high energy compounds, under compound. The energy released on hydrolysis of the bond can be transferred, stored, or used to drive metabolic processes such as the synthesis of glycogen from glucose.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| high frequency blood group |
a group containing over 99 per cent of individuals, who have a type of erythrocyte antigens called public antigens.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| high pressure liquid chromatography |
Chromatography is a family of analytical chemistry techniques for the separation of mixtures. It involves passing the sample, a mixture which contains the analyte, in the "mobile phase", often in a stream of solvent, through the "stationary phase." The stationary phase retards the passage of the components of the sample. When components pass through the system at different rates they become separated in time, like runners in a marathon. ...
출처: en.wikipedia.org/wiki/High_pressure_liquid_chromat...
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| HIg | slightly and pleasantly intoxicated from alcohol or a drug (especially marijuana) |
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| HIg | used of the smell of game beginning to taint |
| HIg | (literal meanings) being at or having a relatively great or specific elevation or upward extension (sometimes used in combinations like `knee-high') |
| HIg | greater than normal in degree or intensity or amount |
| HIg | used of sounds and voices |
| HIg | standing above others in quality or position |
| HIg | at a great altitude |
| HIg | far up toward the source |
| HIg | in or to a high position, amount, or degree |
| HIg | in a rich manner |
| HIg | the main altar in a church |
| HIg | everywhere |