(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.
Polychromic
Definition:
(a.) Polychromatic.
(a.) Pertaining to, or designating, any one of several acids (known only in their salts) which contain more than one atom of chromium.
Example Sentences:
(1) These findings are supported by animal experiments in rabbits with the aid of the polychrome sequence marking technique using fluorochromes.
(2) Experiments in sheep, dogs, and rabbits combining intravital staining of blood circulation and polychrome fluorescent labeling of bone remodeling leads to the conclusion that early bone porosis in the vicinity of the implants is the result of internal remodeling of cortical bone and is induced by necrosis rather than by unloading.
(3) The following methods were used: polychrome injection of arteries, veins, lymph capillaries and vessels, macro-microdissection, staining after van Gieson and with hematoxylin-eosin, impregnation with 0,25--1% solution of silver nitrate, dehydration and clearing, calculation of thickness of loops per 1 mm2 and their depth by means of ocular micrometer.
(4) The tannic acid-polychromic stain method (Mason et al., 1985) designed for the identification of the cultured alveolar type II cells has been adapted to cryostat sections of human lungs.
(5) Polychrome sequence marking and histological tests demonstrated that filling up of bony defects started later with turbine-driven drills than with drills of 2,000 r.p.m.
(6) Impressive polychrome wall murals painted on plaster converted Teotihuacan into a painted city.
(7) High-performance liquid chromatographic analysis of degraded stain samples has shown the products of methanolic degradation to be different from those obtained in aqueous polychroming reactions.
(8) Polychrome injection of arteries and veins was made.
(9) Improved polychrome staining of 1-1.5 mum epoxy sections is achieved with sequential applications of a single basic fuchsin-methylene blue mixture at two different pH values.
(10) Useful extensions of CL microscopy to the field of spectral imaging are obtained with the introduction of a slit, a polychromator and an area detector, substituting for the linear imager.
(11) Drăgan's high-speed PBT (polychrome blue tannin) staining method enables cellular elements to be detected in oral smears in one minute at most.
(12) The different classes of immunoglobulins and their kinetics are determined by the use of monospecific antibodies linked to different enzymes which give a polychromic specific staining.
(13) The staining abnormalities of the first degree disorders are characterized by nonreactivity to the Polychrome stain of the Papanicolaou technique as well as to scarlet red stain of the Shorr technique.
(14) The image of the distribution of 81Br- or 19F-, coded in another color scale, can be superimposed, giving a polychromic image of the cell, thus showing the intracellular localization of the compound.
(15) At 60 C polychroming is rapid, the absorption peak reaching 640-620 nm in 3 days.
(16) The TBLN are revealed by means of polychromic injection of Gerota mass into the lung tissue, or directly into the lymph nodes revealed.
(17) The liver tissue specimens were fixed in OsO4, embedded in epoxy resin, cut 4 microns thick and stained with polychrome.
(18) Polychromic injection of arteries, veins and lymphatic bed, staining of preparations after van Gieson, Weigert, with hematoxylin-eosin and morphometry were the methods applied.
(19) We developed a tannic acid and polychrome stain that can visualize these intracellular inclusions in rat alveolar type II cells by light microscopy and that can be used for autoradiography.
(20) These deposits were polychromic, exhibiting blue, green, red, pink, orange, gold, and yellow colors.