What's the difference between antecedent and precursor?

Antecedent


Definition:

  • (a.) Going before in time; prior; anterior; preceding; as, an event antecedent to the Deluge; an antecedent cause.
  • (a.) Presumptive; as, an antecedent improbability.
  • (n.) That which goes before in time; that which precedes.
  • (n.) One who precedes or goes in front.
  • (n.) The earlier events of one's life; previous principles, conduct, course, history.
  • (n.) The noun to which a relative refers; as, in the sentence "Solomon was the prince who built the temple," prince is the antecedent of who.
  • (n.) The first or conditional part of a hypothetical proposition; as, If the earth is fixed, the sun must move.
  • (n.) The first of the two propositions which constitute an enthymeme or contracted syllogism; as, Every man is mortal; therefore the king must die.
  • (n.) The first of the two terms of a ratio; the first or third of the four terms of a proportion. In the ratio a:b, a is the antecedent, and b the consequent.

Example Sentences:

  • (1) Single-case experimental designs are presented and discussed from several points of view: Historical antecedents, assessment of the dependent variable, internal and external validity and pre-experimental vs experimental single-case designs.
  • (2) The development of pulmonary edema in high-altitude residents with upper respiratory infections and no antecedent low-altitude journey is consistent with the presence of other factors such as inflammation, which may play a role in the pathogenesis of the edema.
  • (3) The favorable prognosis is due solely to the fact that women with an IUD have far less negative antecedents and that the EP probably occurred due to impaired ciliary action, reversible when the IUD is removed.
  • (4) The literature concerning the possible effects of tetracyclines on hemostasis with or without antecedent anticoagulation therapy is reviewed and the speculated mechanisms for such an interaction are discussed.
  • (5) The results suggest that ventriculomegaly, observed even as early as the first week of life, might be a significant antecedent of later motor abnormalities among the survivors of periventricular-intraventricular hemorrhage.
  • (6) These non-pregnant patients without any antecedent autoimmune disease were explored for the presence for autoantibodies especially lupus anticoagulant.
  • (7) The results suggest that patients with shoulder capsulitis should be investigated to exclude diabetes mellitus particularly when there is no history of antecedent trauma.
  • (8) Each patient had subacute pelvic pain without antecedent trauma.
  • (9) The following factors of these patients were analyzed: age, sex, civil status, socio-economic level, occupation, family antecedents, personal antecedents, smoking, alcoholism, presence of cardiac murmurs, arrhythmias, and electrocardiogram.
  • (10) A series of seven experiments related amplitude and latency of the pigeon's startle response, elicited by an intense visual stimulus, to antecedent auditory and visual events in the sensory environment.
  • (11) During the acute index episode, adult family (household) contacts, compared with control adults, had a greater rate of oropharyngeal EBV excretion and high serum antibody responses, which suggested a recent antecedent reactivation of an old EBV infection.
  • (12) A randomly selected group of 224 women with breast cancer responded to an anonymous survey that addressed the presence of menopause, antecedent therapies, symptoms related to estrogen deficiency, concerns about osteoporosis or heart disease, attitude about ERT, and perception about ERT-related cancer risk.
  • (13) An interview was applied to the fathers of the children of the study group in order to determinate hygiene oral habits, eating and familiar antecedents that could influence in the process of the ordinary and rampant caries and to compare between them.
  • (14) Preoperative factors such as location of lesion, antecedent surgery, and previous radiation therapy were assessed and compared to the patients who underwent "emergency" laryngectomy in an attempt to further define risk factors involved in peristomal recurrence.
  • (15) The equivalency of results and the lower cost of the radiologic study indicate that the double-contrast barium enema is the technique of choice for the examination of asymptomatic patients or symptomatic individuals without known antecedent disease.
  • (16) Comparison of the risk of muscle invasion using pathological tumor grade at diagnosis, highest grade at any cystoscopic biopsy before the diagnosis of muscle invasion or highest grade at cystoscopic biopsy immediately antecedent to the cystoscopy at which muscle invasion was diagnosed all showed similar probability of muscle invasion.
  • (17) We show, analyze and discuss their social and demographic features, antecedents, onset and course, acquiring behaviours and its consequences, diagnosis, gnosographic features, results of the psychodiagnostic tests, evolutive relationships with the psychiatric diagnosis and treatment undergone.
  • (18) Fetal abuse may be one antecedent of child abuse, and this paper attempts to transpose the known correlates of child abuse into an antenatal time framework.
  • (19) In both sexes, at all ages, all-cause, cardiovascular, and coronary mortality rates increased progressively in relation to antecedent heart rates determined biennially.
  • (20) No inhibition was detected for activated plasma thromboplastin antecedent (factor XIa), plasma kallikrein, or C1 esterase.

Precursor


Definition:

  • (n.) One who, or that which, precedes an event, and indicates its approach; a forerunner; a harbinger.

Example Sentences:

  • (1) 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.
  • (2) Compound Z has the properties expected of an oxidized MPT precursor.
  • (3) Moreover in MIT-1, the size of the novel polypeptide was not that predicted of the precursor (44.9 kDa) but was about 39 kDa, the same size as the authentic GS gamma polypeptide in CYT-4.
  • (4) It is possible that the elements provide common precursor proteins that reach the secretory intermediate lobe cells through their dendritic branches.
  • (5) The present in vitro studies show that it is found as beta-endorphin in bovine pituitary slices incubated with radioactive amino acid precursor [35S]methionine.
  • (6) Our study suggests that a major part of the renal antimineralocorticoid activity of spironolactone may be attributable to minor sulfur-containing metabolites or their precursors having a high renal clearance that affords access to their site of activity via the renal tubular fluid.
  • (7) When an expression vector containing plasminogen cDNA is transfected into baby hamster kidney cells, the number of drug-resistant colonies as well as the levels of plasminogen secreted by those colonies is lower than observed in similar transfections of other protease precursor genes.
  • (8) These series were prepared by oxidation of the new hydroquinone precursors.
  • (9) Administration of one of the precursors of noradrenaline l-DOPA not only prevented the decrease in tissue noradrenaline content in myocardium, but restored completely its reserves, exhausted by electrostimulation of the aortic arch.
  • (10) By 3 d in the chick embryo, the first neurons detected by antibodies to Ng-CAM are located in the ventral neural tube; these precursors of motor neurons emit well-stained fibers to the periphery.
  • (11) From this proliferating layer, precursor cells migrate outwards to reach the developing neostriatum in a sequential fashion according to two gradients of histogenesis.
  • (12) If this is what 70s stoners were laughing at, it feels like they’ve already become acquiescent, passive parts of media-relayed consumer society; precursors of the cathode-ray-frazzled pop-culture exegetists of Tarantino and Kevin Smith in the 90s.
  • (13) Fiber may have a protective role because of its influence on estrogen metabolism and excretion or because of the endocrine effects of the lignans, a family of compounds formed in the intestine from fiber-associated precursors.
  • (14) Furthermore it is this small compartment that is preferentially radioactively labelled during short-term incubations with radioactively labelled precursors.
  • (15) One important consequence of the conservative mode of replication is that cellular enzymes never gain access to the reovirus genome but only to its ssRNA precursors.
  • (16) The results from rabbit experiments suggest that the 12S protein, probably represents a precursor of TG.
  • (17) In vitro import assays indicate that ATP12 protein is synthesized as a precursor approximately 3 kDa larger than the mature protein.
  • (18) Tritium-labeled ribonucleic acid precursors, including cytidine, uridine, and orotic acid, were injected into rats with dated pregnancies (14 to 21 days) and virgin rats.
  • (19) Pulse-chase experiments showed that the ornithine transcarbamylase precursor and the thiolase traveled from the cytosol to the mitochondria with half-lives of less than 5 min, whereas the three fusion proteins traveled with half-lives of 10-15 min.
  • (20) The results show that centrally administered serotonin, the serotonin precursor, 5-hydroxytryptophan administered with clorgyline, a selective MAO A inhibitor, quipazine, a serotonin receptor agonist, and fluoxetine, a selective inhibitor of neuronal re-uptake of serotonin, attenuated all paradigms of FIA and apomorphine induced potentiation of FIA.