(a.) Sour, sharp, or biting to the taste; tart; having the taste of vinegar: as, acid fruits or liquors. Also fig.: Sour-tempered.
(a.) Of or pertaining to an acid; as, acid reaction.
(n.) A sour substance.
(n.) One of a class of compounds, generally but not always distinguished by their sour taste, solubility in water, and reddening of vegetable blue or violet colors. They are also characterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losing their own peculiar properties. They all contain hydrogen, united with a more negative element or radical, either alone, or more generally with oxygen, and take their names from this negative element or radical. Those which contain no oxygen are sometimes called hydracids in distinction from the others which are called oxygen acids or oxacids.
Example Sentences:
(1) The amino acid sequence deduced from the nucleotide sequence contained both amino- and carboxyl-terminal sequences.
(2) F(420) is photolabile aerobically in neutral and basic solutions, whereas the acid-stable chromophore is not photolabile under these conditions.
(3) The high amino acid levels in the cells suggest that these cells act as inter-organ transporters and reservoirs of amino acids, they have a different role in their handling and metabolism from those of mammals.
(4) If ascorbic acid was omitted from the culture medium, the extensive new connective tissue matrix was not produced.
(5) The interaction of the antibody with both the bacterial and the tissue derived polysialic acids suggests that the conformational epitope critical for the interaction is formed by both classes of compounds.
(6) Arachidic acid was without effect, while linoleic acid and linolenic acid were (on a concentration basis) at least 5-times less active than arachidonic acid.
(7) An unsaturated fatty acid auxotroph of Escherichia coli was grown with a series of cis-octadecenoate isomers in which the location of the double bond varied from positions 3 to 17.
(8) The ability of azelastine to influence antigen-induced contractile responses (Schultz-Dale phenomenon) in isolated tracheal segments of the guinea-pig was investigated and compared with selected antiallergic drugs and inhibitors of arachidonic acid metabolism.
(9) After 4 to 6 hours of recirculation, accumulation of vasoactive amine, 5-hydroxytryptamine, its major metabolite, 5-hydroxyindole acetic acid, and its precursor amino acid, tryptophan were detected.
(10) Spectrophotometric determination of the sulfhydryl content in the animal tissue before (control) and after using 6,6'-Dithiodinicotinic acid is applied.
(11) This death is also dependent on the presence of chloride and is prevented with the non-selective EAA antagonist, kynurenic acid, but is not prevented by QA.
(12) However, four of ten young adult outer arm (relatively sun-exposed) and one of ten young adult inner arm (relatively sun-protected) fibroblasts lines increased their saturation density in response to retinoic acid.
(13) Microionophoretically applied excitatory amino acids induced firing of extracellularly recorded single units in a tissue slice preparation of the mouse cochlear nucleus, and the similarly applied antagonist 2-amino-5-phosphonovalerate (2APV) was demonstrated to be a selective N-methyl-D-aspartate (NMDA) receptor antagonist.
(14) The LD50 of the following metal-binding chelating drugs, EDTA, diethylenetriaminepentaacetic acid (DTPA), hydroxyethylenediaminetriacetic acid (HEDTA), cyclohexanediaminotetraacetic acid (CDTA) and triethylenetetraminehexaacetic acid (TTHA) was evaluated in terms of mortality in rats after intraperitoneal administration and was found to be in the order: CDTA greater than EDTA greater than DTPA greater than TTHA greater than HEDTA.
(15) Estimations of the degree of incorporation of 14C from the radioactive labeled carbohydrate into the glycerol and fatty acid moieties were carried out.
(16) The second amino acid residue influences not only the rate of reaction but also the extent of formation of the product of the Amadori rearrangement, the ketoamine.
(17) Leumorphin is a 29-amino-acid peptide derived from preproenkephalin B. Intracerebroventricular (i.c.v.)
(18) Hepatic lymph flow increased only after ethacrynic acid and mannitol administration.
(19) The subcellular distribution of sialyltransferase and its product of action, sialic acid, was investigated in the undifferentiated cells of the rat intestinal crypts and compared with the pattern observed in the differentiated cells present in the surface epithelium.
(20) A phytochemical investigation of an ethanolic extract of the whole plant of Echites hirsuta (Apocynaceae) resulted in the isolation and identification of the flavonoids naringenin, aromadendrin (dihydrokaempferol), and kaempferol; the coumarin fraxetin; the triterpene ursolic acid; and the sterol glycoside sitosteryl glucoside.
Sour
Definition:
(superl.) Having an acid or sharp, biting taste, like vinegar, and the juices of most unripe fruits; acid; tart.
(superl.) Changed, as by keeping, so as to be acid, rancid, or musty, turned.
(superl.) Disagreeable; unpleasant; hence; cross; crabbed; peevish; morose; as, a man of a sour temper; a sour reply.
(superl.) Afflictive; painful.
(superl.) Cold and unproductive; as, sour land; a sour marsh.
(n.) A sour or acid substance; whatever produces a painful effect.
(v. t.) To cause to become sour; to cause to turn from sweet to sour; as, exposure to the air sours many substances.
(v. t.) To make cold and unproductive, as soil.
(v. t.) To make unhappy, uneasy, or less agreeable.
(v. t.) To cause or permit to become harsh or unkindly.
(v. t.) To macerate, and render fit for plaster or mortar; as, to sour lime for business purposes.
(v. i.) To become sour; to turn from sweet to sour; as, milk soon sours in hot weather; a kind temper sometimes sours in adversity.
Example Sentences:
(1) The sensitivity of the taste system to the various qualities was, in decreasing order, salty, sweet, sour, and bitter.
(2) The parotid saliva of the caries-rampant group showed a significantly higher level of anodemigrating proteins, predominantly isoamylases, and a significantly lower level of cathode-migrating proteins than that of the caries-resistant group in both paraffin-stimulated and sour lemon-stimulated salivary flows.
(3) But the cocktails take centre stage and are like drinkable pieces of art – try the margarita or the pisco sour.
(4) The munching, and some data crunching, produced firm statistical findings ("The flavour cowy was correlated with age and sourness, but was not correlated to any other flavours or tastes").
(5) A shame such a landmark achievement was soured by Allam refusing to talk to the local council over a potential stadium expansion and trying to change the club’s name to Hull Tigers, which many fans vehemently oppose.
(6) Admittedly, there has been a bit of sour grapes in the English response to the success of Dempsey et al, and no doubt we will be treading those grapes into wine and drinking ourselves into oblivion if Team USA get much further – they are, as today's typically excitable NY Daily News front page informs us, now just "four wins from glory" .
(7) Kaesong, which facilitated nearly $2bn a year in cross-border trade, had been the last joint project left as relations between the two Koreas soured over the past five years.
(8) The UK remains one of the most diligent enforcers of convention rights, but it appears to have soured into one of the least appreciative national constituencies.
(9) Before the adenosine test, the perception of sourness was tested similarly with six concentrations of citric acid (1-100 mM).
(10) Sour taste stimuli (weak acids) decreased outward K+ currents and slightly reduced inward currents; bitter taste stimuli (quinine) reduced inward currents to a greater extent than outward currents.
(11) If i remember correctly, a third of the milk was turned sour, a Russian delicacy'.
(12) Instead, the different taste qualities--sweet, sour, salty, bitter--are subserved by different mechanisms.
(13) "They are taking a mixed strategy, which I would call the sweet and sour approach," Peter Beck, research fellow at Stanford University and a specialist on Korean affairs, told Reuters.
(14) On average, monosodium glutamate and seltzer, which mongrel dogs do not normally encounter in their diets, produced lower gastric acid secretion and pancreatic polypeptide release than sweet, sour, salty, bitter, and meaty tastes.
(15) Ruth Joseph and Sarah Nathan's crumbly little almond and lemon tarts are the perfect example of its charms, to my mind – not too sweet, not too sour, just intensely, deliciously zesty.
(16) Behavior of Staphylococcus aureus strains 100-A, 196-E, 254, 473, 505, and 521 in sweet (18 to 80% milk fat) and neutralized sour cream was studied.
(17) "That was for the players and their families," said Benítez, the implication being why should he risk souring the atmosphere by simply joining in?
(18) If the maximum investment choice is not taken, and NHS performance turns sour in future years, Stevens will be able to say, “I told you so”.
(19) They worked together at Porto, Chelsea and Internazionale but the relationship has soured.
(20) Suu Kyi's relationship with the generals has reportedly turned sour again In her tireless efforts to secure cooperation from the military, Suu Kyi has repeatedly expressed her appreciation, respect and “genuine” affection for the Tatmadaw (feudal military), which her father founded under Japan’s fascist patronage in December 1942, much to the dismay of many minorities who have borne the brunt of the organisation’s ruthless policies.