(a.) Pertaining to, derived from, or containing iron. Specifically (Chem.), denoting those compounds in which iron has a higher valence than in the ferrous compounds; as, ferric oxide; ferric acid.
Example Sentences:
(1) Thus, although ferric-enterochelin cannot penetrate the cell surface from outside, the complex that is formed within the envelope is transported normally into the cell.
(2) Ferric iron in aqueous solution was used as an iron-only control.
(3) The free radical scavengers mannitol, thiourea, benzoate, and 4-methylmercapto-2-oxobutyrate protected either native cells exposed to H2O2 or pretreated hepatocytes exposed to H2O2 and given ferric or ferrous iron.
(4) During this reaction, the complete reduction of ferric ions present in ferredoxin was observed with a fast rate under either aerobic or anaerobic conditions.
(5) The effects of naftidrofuryl have been studied on MDA production in phosphate buffer in the presence or absence of ferric ions.
(6) Iron presented as inorganic ferric or ferrous salts may also be absorbed, though the more soluble ferrous salts are adsorbed much more rapidly.
(7) By using the Lancefield method as the standard, there was 100% agreement with both the colorimetric and ferric chloride tests for hippurate hydrolysis, and 96% agreement with the CAMP test.
(8) 220 MHz proton Fourier transform (FT) NMR with quadrature phase detection (QPD) technique is applied to observe largely hyperfine-shifted signals of various hemoproteins and hemoenzymes in ferric high-spin state.
(9) An additional synthetic analog of RA, which lacks a carbonyl group at the diketopiperazine ring, exhibited the same uptake rates as ferric RA.
(10) The electronic structure of the low-spin ferric iron in cyanide complex appears to be modulated by halide binding to a protonated amino acid in the distal heme cavity.
(11) Ferric ammonium citrate, ferrous sulfate and ferrous gluconate were all found effective in preventing rat anemia when added to their drinking water.
(12) Ferric ion and ferrocyanide are bound to nodes as colloidal precipitates, and may migrate away from their sites of formation.
(13) Of several heavy metal ions, such as Fe3+, Fe2+, Co2+, Ni2+, Cu2+ and Zn2+, tested for supplementation of the alkaline growth deficiency, only iron, either added in the ferrous or ferric form, was able to restore cellular growth.
(14) Ferric reduction takes place at the plasma membrane of the root epidermis cells by a transmembrane redox system, which can be activated when iron is getting short.
(15) Ferric[59Fe] citrate was injected to rats bearing hepatoma induced by the administration of diethylnitrosamine.
(16) On the morning before a 10 d collection period, the milk-substitutes were supplemented with 59Fe as ferric chloride and 65Zn as zinc chloride.
(17) A gene (FRE1) was identified which encodes a protein required for both ferric iron reduction and efficient ferric iron assimilation, thus linking these two activities.
(18) These results, taken together, indicate a role for ferric citrate in the iron nutrition of this strain, which has been shown to be an efficient nitrogen-fixing strain on a variety of soybean cultivars.
(19) The reduced toxicity can be correlated with changes in the difference spectrum of ferric-Adriamycin vs Adriamycin (ADR), where a peak around 610 nm shifted to the 570 nm region.
(20) Electron paramagnetic resonance (EPR) at 15 K was used to probe the magnetic interaction between the visible copper CuA2+ and ferric cytochrome a in the carbon monoxide compound of beef heart cytochrome oxidase.
Valence
Definition:
(n.) The degree of combining power of an atom (or radical) as shown by the number of atoms of hydrogen (or of other monads, as chlorine, sodium, etc.) with which it will combine, or for which it can be substituted, or with which it can be compared; thus, an atom of hydrogen is a monad, and has a valence of one; the atoms of oxygen, nitrogen, and carbon are respectively dyads, triads, and tetrads, and have a valence respectively of two, three, and four.
Example Sentences:
(1) The mixed-valence-state cytochrome oxidase mixed with O2 at -24 degrees C and flash-photolysed at -60 to -100 degrees C reacts with O2 and initially forms an oxy compound (A2) similar to that formed from the fully reduced state (A1).
(2) Additional results, together with simulations based on a simple kinetic model, suggest that the reduced apparent valence of the low slope component of the Q-V curve results from gating charge immobilization occurring at holding potential.
(3) A related explanation is that the 609 nm absorbance involves a charge-transfer interaction of both iron and copper as a mixed-valence binuclear complex, Cua3, having properties of a non-blue copper.
(4) RBDs were significantly more impaired than LBDs or NCs on category and valence accuracy, while LBDs posed expressions with significantly more intensity than RBDs or NCs.
(5) The extent of adsorption was affected by the concentration and valency of cations, indicating a charge-dependent process.
(6) Use of that principle was demonstrated by fourth grade children who judged that telling the truth, as opposed to lying, was shown by a consistency between the affective valence of the verbal and the nonverbal communications.
(7) Research reported here shows that primary and transferred releasing valences are differentially affected by environmental variables.
(8) Furthermore, the valences of all ions in solution on both sides of the membrane are taken to be of equal absolute magnitude.
(9) Possible valence bond structures for 3-methylpurine residues in DNA are discussed, leading to the suggestion that ionized forms with positively charged amino groups may be the most effective blocks to template activity.
(10) A confirmatory factor analysis on these subscales showed that the Affective Valence, Empathic Caring, Self-Sacrifice, and Societies' Duties subscales each reflect a humanitarian concern for children and that the Instrumentality and Authoritarian Attitude subscales tap values involving a moralistic expectation of children.
(11) The excitatory potential, the involvement potential, and the hedonic valence of the nonerotic and erotic stimuli were also assessed.
(12) A monovalent form of concanavalin A (m-Con A) has been prepared to determine the importance of valence for human lymphocyte surface binding and subsequent lymphocyte stimulation as measured by blast transformation and cytotoxicity.
(13) As concerns the valence of the natural focus, the most important was the inundated forest in the Drnholec locality.
(14) Examination of the antigen dose-response curves and maximal responses obtained suggests that valency of the antigen may be important both in determining the avidity of interaction between the pCTL and the antigen-bearing structure, and in determining the extent to which localized receptor cross-linking occurs on the cell surface to result in triggering.
(15) Therefore, no conclusions about biological valence and tumour localisation could be drawn from the aspect of the cell picture which we observed and from the degree of pleocytosis.
(16) During presentation of pictures with negative valence the m. frontalis lateralis and the m. corrugator supercilii revealed enhanced EMG-reactions as compared to the repeated presentation of pictures with positive valence.
(17) The degree and the character of these changes depend on cation valency and the initial value of cell EM.
(18) Maximum adsorption at 23 degrees C occurred within 2 h. The amounts of DNA which adsorbed to sand increased with the salt concentration (0.1 to 4 M NaCl and 1 mM to 0.2 M MgCl2), salt valency (Na+ less than Mg2+ and Ca2+), and pH (5 to 9).
(19) The influence of valence and heavy chain on antibody activity was investigated using transfectoma-derived, class-switched IgG1 and IgM human monoclonal antibodies (MAbs) reactive with the bacterial pathogens Escherichia coli K1 and group B Streptococcus species.
(20) The obtained data allows to suggest that one of the possible mechanisms of 6-ONDA neurotoxic action includes the generation of superoxide, whose dismutation to hydrogen peroxide in the presence of transient valency ions gives rise to HO.