What's the difference between preamble and precursor?

Preamble


Definition:

  • (n.) A introductory portion; an introduction or preface, as to a book, document, etc.; specifically, the introductory part of a statute, which states the reasons and intent of the law.
  • (v. t. & i.) To make a preamble to; to preface; to serve as a preamble.

Example Sentences:

  • (1) An affirmative result for the preamble was obtained in this study.
  • (2) I don’t think, at least in Iowa, her almost celebrity status over some of the others gets her any type of advantage.” Palin confused many onlookers with the directions taken in her remarks, which featured a freewheeling preamble of almost 10 minutes – half the time allotted to each speaker.
  • (3) Referee Frank De Bleeckere (Belgium) Preamble: Algeria have scored only goal in their last seven matches and that was a penalty against the United Arab Emirates.
  • (4) 8.46pm GMT Preamble OK. We know it's going to be cold at Lambeau Field.
  • (5) cries Gary Naylor, making a liar of me and the cast-iron GUARDIAN NO-SUAREZ GUARANTEE™ in the preamble.
  • (6) She read aloud the act preamble , acknowledging the Aboriginal peoples and Torres Strait Islanders as the inhabitants of Australia before European settlement and the dispossession, without compensation, of their lands.
  • (7) Here's what happened the last time these two sides played here in mid-October: Facebook Twitter Pinterest Share Share this post Facebook Twitter Pinterest close 3.27am GMT Preamble Hello, and welcome to the Western Conference semi-final second leg between Portland Timbers and Seattle Sounders , in which Portland try to defend a slim lead and Seattle continue their annual quest to make a second leg playoff comeback actually count.
  • (8) The Bolton player may end up featuring more in the Gold Cup than these World Cup qualifiers, but who knows what twists and turns lie ahead — it’s not as if a year ago anyone was anticipating Landon Donovan not being picked for a squad he was eligible for... Here’s the US roster in full: GOALKEEPERS: Brad Guzan (Aston Villa), Tim Howard (Everton), Sean Johnson (Chicago Fire) DEFENDERS: DaMarcus Beasley (Puebla), Matt Besler (Sporting Kansas City), Geoff Cameron (Stoke City), Omar Gonzalez (LA Galaxy), Clarence Goodson (Brondby), Michael Parkhurst (Augsburg) MIDFIELDERS: Brad Davis (Houston Dynamo), Brad Evans (Seattle Sounders FC), Stuart Holden (Bolton), Jermaine Jones (Schalke), Sacha Kljestan (Anderlecht), Graham Zusi (Sporting Kansas City) FORWARDS: Jozy Altidore (AZ Alkmaar), Terrence Boyd (Rapid Vienna), Clint Dempsey (Tottenham Hotspur), Herculez Gomez (Santos), Eddie Johnson (Seattle Sounders FC) More on Belgium in a minute 12.25am BST Preamble Hello, Cleveland!
  • (9) Not that a US win is guaranteed — as the clip in the preamble shows Jamaica know they can beat this US side, and they’ll be playing with the home advantage of “The Office” - the nickname for Jamaica’s Independence Park.
  • (10) Let me know at paolo.bandini.freelance@guardian.co.uk or on Twitter @Paolo_Bandini 7.28pm GMT Preamble Are we about to witness the birth of another of great footballing rivalry at Hampden Park?
  • (11) 11.28pm GMT Kolten Wong As mentioned in the preamble, Wong apologised on twitter after the game, after holding back tears describing how he slipped getting back to first base.
  • (12) It is what every Conservative prime minister I have worked for was determined to avoid.” But Iain Duncan Smith, a former Conservative leader and longstanding Brexit campaigner, insisted that it marked the “end of all of the preamble and the beginning of departure”.
  • (13) The Supreme Court declined to the rule on the constitutionality of this preamble, maintaining that the preamble did no regulate abortions or medical practice.
  • (14) Between now and 1pm we'll get across the preamble to the statement and note some other developments in politics today.
  • (15) Updated at 4.30pm BST 2.21pm BST Preamble To hear the players and managers talking about it , the pitch at the Khimki Arena will be akin to playing in the Somme circa July 1916.
  • (16) How Newcastle’s manager must have regretted likening himself to the captain of the Titanic in the preamble to kick off.
  • (17) EDIT: Word is it’s Johnson and Cameron who got the nod - so a mix of attacking and defensive instincts then... 2.32am BST Preamble Welcome to Seattle for tonight’s World Cup qualifier between USA and Panama.
  • (18) Facebook Twitter Pinterest Share Share this post Facebook Twitter Pinterest close 6.39pm BST Preamble Wilkommen bei den minute-auf-minute der 2013 Champions League Fußball final!
  • (19) 8.58pm GMT Preamble When Peyton Manning takes to Sports Authority Field to begin his latest playoff run, his Broncos will be facing more than just the San Diego Chargers.
  • (20) I think the public and politicians are at one on the issue.” A recent survey found that nearly three out of four people supported the mention of Indigenous peoples in the preamble of the founding document, and an even greater percentage supported the removal of clauses that discriminated on the basis of race.

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.