What's the difference between dissociation and thermolysis?

Dissociation


Definition:

  • (n.) The act of dissociating or disuniting; a state of separation; disunion.
  • (n.) The process by which a compound body breaks up into simpler constituents; -- said particularly of the action of heat on gaseous or volatile substances; as, the dissociation of the sulphur molecules; the dissociation of ammonium chloride into hydrochloric acid and ammonia.

Example Sentences:

  • (1) These results show that the pathogenic phenotypes of MCF viruses are dissociable from the thymotropic phenotype and depend, at least in part, upon the enhancer sequences.
  • (2) Structure assignment of the isomeric immonium ions 5 and 6, generated via FAB from N-isobutyl glycine and N-methyl valine, can be achieved by their collision induced dissociation characteristics.
  • (3) It has recently been suggested that procaine penicillin existed in solution in vitro and in vivo as a "procaine - penicillin" complex rather than as dissociated ions.
  • (4) Elongation of existing RNA primers by the human polymerase-primase was semi-processive; following primer binding the DNA polymerase continuously incorporated 20 to 50 nucleotides, then it dissociated from the template DNA.
  • (5) Blood gas variables produced from a computed in vivo oxygen dissociation curve, PaeO2, P95 and C(a-x)O2, were introduced in the University Hospital of Wales in 1986.
  • (6) The data shows a dissociation between ferritin synthesis, cellular accumulation and secretion for which the mechanisms have still to be elucidated.
  • (7) Electromechanic dissociation, sinus bradycardia, nodal rhythm followed by idioventricular rhythm and asystole, were observed following myocardial rupture.
  • (8) Transcription studies in vitro on repression of the tryptophan operon of Escherichia coli show that partially purified trp repressor binds specifically to DNA containing the trp operator with a repressor-operator dissociation constant of about 0.2 nM in 0.12 M salt at 37 degrees , a value consistent with the extent of trp operon regulation in vivo.
  • (9) These differences in central connectivity mirror the reports on behavioral dissociation of the facial and vagal gustatory systems.
  • (10) In contrast, the enzymic domain of the colicin (T2) remained in the aqueous phase and was recovered in a highly active form as a consequence of its dissociation from the immunity protein.
  • (11) Predominantly observed defects included neural crest cells in ectopic locations, both within and external to the neural tube, and mildly deformed neural tubes containing some dissociating cells.
  • (12) Inhibition assays indicate an apparent dissociation constant (Kd) corresponding to 4 x 10(-9) M and an affinity constant (Ka) to 2.5 x 10(8)M-1 to K562 erythroleukemia cells.
  • (13) When CO was photolytically dissociated from the reduced protein two recombination processes were observed with rates almost identical with those observed in the stopped-flow experiments (k+1 = 3.3 X 10(3)M-1-S-1 and k+2 = 6.0 X 10(2)M-1-S-1).
  • (14) On the other hand, ultraviolet (320-nm) light, absorbed by 3-hydroxy-pyridinium cross-links which were rapidly photolyzed, partially dissociated polymeric collagen aggregates from bovine Achilles tendon after subsequent heating.
  • (15) The corresponding dissociation constants range from 2.8 nM for the native enzyme and 8.5 nM for the 96K fragment to approximately 15 nM for the 68K and 90K fragments [0.20 N KCl, 50 mM 3-(N-morpholino)propanesulfonic acid, and 1 mM CaCl2, pH 7.3, 25 degrees C].
  • (16) Addition of pyridoxal 5'-phosphate to slow dissociating, high affinity 5S R[3H]E2 dimers free in cytosol induced rapid [3H]E2 dissociation, although the receptor remained unaltered in the transformed dimerized state.
  • (17) If VF persisted or if countershock resulted in asystole or a nonperfusing rhythm (electrical-mechanical dissociation [EMD]), the alternate drug (naloxone or epinephrine) was then given.
  • (18) Addition of albumin or GTP to the incubation medium enhanced the specific binding of PGE2 by decreasing the dissociation constant of the low affinity-high capacity binding sites.
  • (19) Dissociated cerebral hemisphere cells from 4- to 7-day-old chick embryos were cultured either on a collagen or a polylysine substrate in a serum-containing medium.
  • (20) Incubation of the enzyme-inhibitor complex with the sulfhydryl reagent caused dissociation into active ribonuclease and inactive inhibitor.

Thermolysis


Definition:

  • (n.) The resolution of a compound into parts by heat; dissociation by heat.

Example Sentences:

  • (1) The inactivation of lysozyme caused by the radicals produced by thermolysis of 2,2'-azo-bis-2-amidinopropane can be prevented by the addition of different compounds that can react with the damaging free radicals.
  • (2) Vaporization of a ornithine-containing polar lipid from Thiobacillus thiooxidans has been accomplished by thermolysis in a chemical ionization source.
  • (3) Complications of electrolysis and thermolysis and the pathophysiology of hair regrowth are presented.
  • (4) The assay involves extraction with diethyl ether, thermolysis of the sulphonylureas at 100 degrees C and trapping of the resulting amines with 2,4-dinitrofluorobenzene.
  • (5) The present work constitutes an entirely novel contribution in the scope of microbiology and especially in taxonomy, introducing thermolysis curves as a rapid method of characterization of fungal polysaccharides and bacterial lipopolysaccharides.
  • (6) These findings were not surprising in light of our previous studies on the formation of PCDFs and PCDDs from the thermolysis (500-750 degrees C in presence of air) of PCBs or PCBZs.
  • (7) The historical, legal, and theoretical aspects and clinical technics of both electrolysis and thermolysis are critically reviewed.
  • (8) Both methylthiosulphoxide epimers (V) have been shown to be susceptible to thermolysis yielding the monoethylthio- derivative (VI) via elimination of methylsulphenic acid.
  • (9) The results are interpreted in terms of an efficient inactivation of the enzyme by the alkylperoxyl radicals generated by thermolysis of the azocompound.
  • (10) Cadaverine at final concentration 1.0 and 0.1 mM protected lysosomes from thermolysis.
  • (11) Meningitis due to Gemella haemolysans developed in a 73 year old woman after thermolysis of the Gasserian ganglion for trigeminal neuralgia.
  • (12) The results demonstrate the utility of chemical ionization for developing an understanding of a thermolysis process.
  • (13) Neither Tty, Tva, nor Ts, alone constitutes the specific stimulus leading to thermolysis by sweating.
  • (14) The molecular ion is the base peak in the majority of cases, provided that thermolysis is minimized when using the direct probe or gas chromatography inlets.
  • (15) When given to the rats at the nadir of ethanol hypothermia, diazepam did not potentiate ethanol's thermolysis but retarded the recovery from hypothermia; it caused also a dose-dependent delay in the recovery of motor coordination and other responses.
  • (16) Thermolyzed casein promotes early colonic precursor lesions in a dose-dependent and thermolysis time-dependent manner; thermolyzed casein also promotes colon cancer.
  • (17) To determine how thermolysis affects this promotion, we examined thermolysis conditions, quantity of thermolyzed protein in the diet, and duration of thermolysis.
  • (18) We propose that the elevated basal temperature observed in SHR is not due to an impaired thermolysis but the result of a noradrenaline-mediated hyperreactivity to environmental stress, e.g.
  • (19) Some historical parallels exist between this disturbing period and present day electrolysis and thermolysis practice: only twenty-seven states currently require licensing for permanent hair removal, which is a procedure with rare but potentially serious complications.
  • (20) Sixteen plant-derived or synthetic coumarins with various hydroxyl and other substitutions were tested for their ability to scavenge alkylperoxyl radicals generated in the aqueous phase by the controlled thermolysis of 2,2'-azo-bis-(2-amidinopropane) dihydrochloride (ABAP).