(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.
Litmus
Definition:
(n.) A dyestuff extracted from certain lichens (Roccella tinctoria, Lecanora tartarea, etc.), as a blue amorphous mass which consists of a compound of the alkaline carbonates with certain coloring matters related to orcin and orcein.
Example Sentences:
(1) The Tea Party movement has turned climate denial into a litmus test of conservative credentials – and that has made climate change one of the most sharp divisions between Obama and Romney.
(2) Despite this, the ban has remained a moral litmus test for Democratic politicians.
(3) Jakarta governor election a 'litmus test' of Indonesian Islam Read more Stakes in the vote have been raised by allegations that Ahok – the city’s first non-Muslim governor for half a century and its first ethnic Chinese leader – insulted the Koran.
(4) Today's events were a litmus test for the strength of a new generation of anti-government activists, who have rejected the moribund landscape of formal politics and begun organising online.
(5) Richard Dicker, head of international justice at Human Rights Watch in New York, said Libya's actions over the two suspects would be the litmus test of its commitment to democracy and the rule of law.
(6) "How we respond to dementia is the litmus test of whether we can face up to the challenge of an ageing population, and do so in a way which allows compassion and dignity.
(7) In evaluating the in vitro proteolytic potential of M bovis isolates, 83 hemolytic and 5 nonhemolytic isolates peptonized litmus milk; 176 nonhemolytic isolates did not peptonize litmus milk.
(8) Whatever the merits of the decision, the coming days with coverage of Thatcher's funeral to negotiate will be a litmus test for Hall, a former head of BBC News, who arrived back at the corporation after 12 years as chief executive of the Royal Opera House on 2 April.
(9) They grow on buffered charcoal-yeast extract agar and nutrient broth, but rarely on MacConkey agar, at 25 and 30 degrees C. They are urease positive; but they are negative in reactions for hemolysis, indole production, H2S production (triple sugar iron agar), gelatin hydrolysis, esculin hydrolysis, and peptonization of litmus milk.
(10) Many outside the region will be watching closely – with Andalusians representing 20% of voters in Spain, the election is widely seen as a litmus test for municipal, regional and general elections due to be held across the country later this year.
(11) Growth is good on 5% bile salts-agar and in broth at 10 C, and in broth adjusted to pH 9.6 or containing 6.5% NaCl, but many strains fail to grow at 45 C. Litmus is reduced rapidly prior to formation of an acid curd.
(12) My litmus test was would they behave this way with a local woman and I knew the answer was no, they knew I lived alone, so I didn’t let them in.” Harris says she raised the issue with her GIZ manager but claims he dismissed her concerns, she said.
(13) Still, it’s an impressive coup for the league to ensure their part of the deal and the stability it brings – whatever the multi-platform future, the large-scale TV deal is still one of the key unsentimental litmus tests for how a league is translating, and while the network executives, particularly ESPN’s John Skipper, acknowledged that “it’s a future buy.
(14) The elongation test to distinguish the bacillary M vovis from the coccal N ovis, the nitrate reduction and the litmus milk tests were found to be the most reliable.
(15) Strains were identified to the species level by hydrolysis of esculin, reactions in litmus milk, slime production on 5% sucrose agar, acidification of maltose, melibiose, and raffinose broths, deamination of arginine, and growth at 42 degrees C and in 6.5% NaCl broth.
(16) There is no suggestion of the litmus test of localism, an end to rate capping.
(17) A high proportion of M. bovis from IBK lesions were simultaneously active in haemolysis, agar corrosion, gelatin liquefaction and litmus milk peptonisation.
(18) Perfringens was based on atmospheric requirements for growth, colonial morphology, and stormy fermentation in litmus milk.
(19) Tony Abbott’s “sex appeal” candidate, Fiona Scott, is poised for a landslide victory in the litmus-test western Sydney seat of Lindsay with a stunning 60% of the primary vote, according to a Guardian Lonergan poll.
(20) But, describing Brexit negotiations as a “litmus test for responsible financial globalisation”, Carney suggested such gains were now at risk.