(1) 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.
(2) These membrane perturbation effects not observed with bleomycin-iron in the presence of a hydroxyl radical scavenger, dimethyl thiourea, or a chelating agent, desferrioxamine, were correlated with the ability of the complex to generate highly reactive oxygen species.
(3) Symptoms, particularly colicky abdominal pain, improved during the period of chelation therapy.
(4) The present study explored the possibility that SOD-mimics such as desferrioxamine-Mn(III) chelate [DF-Mn] or cyclic nitroxide stable free radicals could protect from O2-.-independent damage.
(5) Chelators and sulfhydryl group reacting substances reduced the enzyme activity.
(6) Co2+ partially restored the activities lost by chelation.
(7) A chelator, dichloromethane diphosphonate (Cl2MDP), used to treat for malignancy-induced hypercalcemia, has nephrotoxic potential.
(8) This procedure, using mixed ligand chelate systems, may well be one which is limited to conditions more narrowly similar to those reported by Schubert and Derr (1978).
(9) Since the enzyme requires a metal ion (Co2+) we suggest that the RNA and heparin are inhibitory by virtue of their capacity to chelate the Co2+.
(10) Due to the higher stability constant, of MgCDTA, as compared to MgEDTA, addition of CDTA to a medium containing free Mg2+ and MgEDTA will not only chelate the free Mg2+, but it will also shift the equilibrium from MgEDTA towards MgCDTA, i.e.
(11) Their ability to inhibit iron-ion-dependent formation of .OH from H2O2 by chelating iron ions was also tested.
(12) The interest of monitoring lead excretion during chelation therapy is particularly emphasized.
(13) The data obtained testify to the presence in the granular fraction of the endopeptidase LTH-converting activity which is sensitive to pepstatin A, an aspartyl proteinase inhibitor as well as to chelators and a serine proteinase inhibitor.
(14) Chelation of extracellular calcium with ethyleneglycol-bis(beta-aminoethyl ether)N,N,N',N' tetraacetic acid (EGTA) did not abolish the increase in calcium.
(15) One was identified as viridomycin A, the ferrous chelate of 4-hydroxy-3-nitrosobenzaldehyde; the second (actinoviridin A) was the corresponding carboxylic acid chelate and the third (viridomycin E) was a hybrid chelate containing both the aldehyde and acid ligands.
(16) The ferrous iron chelator, bipyridyl, enhanced the production of chemiluminescence catalyzed by FeSO4 and ferritin but had little effect on the K3Fe(CN)6-catalyzed reaction.
(17) Kininase activity in the glomerulus and the proximal tubule was completely inhibited by chelating agents.
(18) Both enzymes are strongly inhibited by metal-chelating agents.
(19) Accumulated cysteine may chelate iron, accounting for the local increase in iron content in Hallervorden-Spatz disease.
(20) The efficiency of hydroxyl radical generation varied with the nature of the iron chelators used and increased in the order of phosphate alone approximately ADP less than EDTA less than diethylenetriaminepentaacetic acid (DETAPAC).
Heavy
Definition:
(a.) Having the heaves.
(superl.) Heaved or lifted with labor; not light; weighty; ponderous; as, a heavy stone; hence, sometimes, large in extent, quantity, or effects; as, a heavy fall of rain or snow; a heavy failure; heavy business transactions, etc.; often implying strength; as, a heavy barrier; also, difficult to move; as, a heavy draught.
(superl.) Not easy to bear; burdensome; oppressive; hard to endure or accomplish; hence, grievous, afflictive; as, heavy yokes, expenses, undertakings, trials, news, etc.
(superl.) Laden with that which is weighty; encumbered; burdened; bowed down, either with an actual burden, or with care, grief, pain, disappointment.
(superl.) Slow; sluggish; inactive; or lifeless, dull, inanimate, stupid; as, a heavy gait, looks, manners, style, and the like; a heavy writer or book.
(superl.) Strong; violent; forcible; as, a heavy sea, storm, cannonade, and the like.
(superl.) Loud; deep; -- said of sound; as, heavy thunder.
(superl.) Dark with clouds, or ready to rain; gloomy; -- said of the sky.
(superl.) Impeding motion; cloggy; clayey; -- said of earth; as, a heavy road, soil, and the like.
(superl.) Not raised or made light; as, heavy bread.
(superl.) Not agreeable to, or suitable for, the stomach; not easily digested; -- said of food.
(superl.) Having much body or strength; -- said of wines, or other liquors.
(superl.) With child; pregnant.
(adv.) Heavily; -- sometimes used in composition; as, heavy-laden.
(v. t.) To make heavy.
Example Sentences:
(1) We were instantly refused entrance by the heavies at the door.
(2) With the exception of PMMA and PTFE, all plastics leave a very heavy tar- and soot deposit after burning.
(3) One-nation prime ministers like Cameron found the libertarians useful for voting against taxation; inconvenient when they got too loud about heavy-handed government.
(4) The prevalence was also higher in medium and heavy smokers.
(5) These results indicate that the inhibition of CarAc by heavy metals occurs by binding of the sulfhydryl on the enzyme by the metals.
(6) The biggest single source of air pollution is coal-fired power stations and China, with its large population and heavy reliance on coal power, provides $2.3tn of the annual subsidies.
(7) The combined evidence from immunoglobulin light chain staining and the analysis of immunoglobulin heavy chain gene rearrangement indicated that the lesions in most patients represented polyclonal proliferations that gave rise to clonal subpopulations.
(8) Variations in light chain composition, particularly fast and slow myosin light chain 1, appeared to occur independently of the variations in heavy chain composition, suggesting that some myosin molecules consist of mixtures of slow- and fast-type subunits.
(9) In general, enzyme activity was strongly reduced by heavy metal inorganic cations; less strongly by organometallic cations, some anions, and certain pesticides; and weakly inhibited by light metal cations and organometallic and organic compounds.
(10) But the condition of edifices such as B30 and B38 - and all the other "legacy" structures built at Sellafield decades ago - suggest Britain might end up paying a heavy price for this new commitment to nuclear energy.
(11) By applying this method to rat cardiac whole muscle, high-molecular weight proteins, such as myosin heavy chains, are focused on the first-dimensional gels and, in addition, minor components are resolved on the second-dimensional gels, without loss during equilibration with detergent.
(12) To identify cells of different myogenic lineages, myotubes were analyzed for content of fast and slow classes of myosin heavy chain (MHC) isoforms by immunocytochemistry and immunoblotting using specific monoclonal antibodies.
(13) Horses in heavy training may require more energy than they can consume on a conventional diet.
(14) As yet the observations demonstrate that workers exposed in their occupation to heavy metals (cadmium, lead, metalic mercury) and organic solvents should be subjected to special control for detection of renal changes.
(15) Heavy death losses (59%) occurred in adult Mystromys 3--14 days after muscle biopsies were taken from their rear legs.
(16) A comparative analysis of the structure and reactivity of the recombinant monoclonal antibodies showed that the light and heavy Ig-specific chains could form the reactive antibodies when the chains were present in different paratopes of Ig molecules.
(17) Mononucleosomes obtained from labeled cells were fractionated by rate zonal sedimentation through a sucrose gradient in heavy water (Senshu et al.
(18) Previous epitope mapping studies of human factor VIII (FVIII) inhibitor antibodies with heavy chain specificity localized epitopes to the amino-terminal half of the FVIII A2 domain.
(19) The ABI figures revealed that the best annuity for someone who is a heavy smoker and has severely impaired health was at Prudential, which paid out 46% more than the worst, from Friends Life.
(20) The parasites were highly aggregated within the study community, with most people harbouring low burdens while a few individuals harboured very heavy burdens.