What's the difference between about and approximate?

About


Definition:

  • (prep.) Around; all round; on every side of.
  • (prep.) In the immediate neighborhood of; in contiguity or proximity to; near, as to place; by or on (one's person).
  • (prep.) Over or upon different parts of; through or over in various directions; here and there in; to and fro in; throughout.
  • (prep.) Near; not far from; -- determining approximately time, size, quantity.
  • (prep.) In concern with; engaged in; intent on.
  • (prep.) On the point or verge of; going; in act of.
  • (prep.) Concerning; with regard to; on account of; touching.
  • (adv.) On all sides; around.
  • (adv.) In circuit; circularly; by a circuitous way; around the outside; as, a mile about, and a third of a mile across.
  • (adv.) Here and there; around; in one place and another.
  • (adv.) Nearly; approximately; with close correspondence, in quality, manner, degree, etc.; as, about as cold; about as high; -- also of quantity, number, time.
  • (adv.) To a reserved position; half round; in the opposite direction; on the opposite tack; as, to face about; to turn one's self about.

Example Sentences:

Approximate


Definition:

  • (a.) Approaching; proximate; nearly resembling.
  • (a.) Near correctness; nearly exact; not perfectly accurate; as, approximate results or values.
  • (v. t.) To carry or advance near; to cause to approach.
  • (v. t.) To come near to; to approach.
  • (v. i.) To draw; to approach.

Example Sentences:

  • (1) Between 25 and 40 degrees C, the thermal dependencies of VR and f were approximately constant (Q10's of 1.31 and 1.36 got VR and f, respectively).
  • (2) The proportion of teeth per child with calculus was approximately 8 percent for supragingival and 4 percent for subgingival calculus.
  • (3) 5-Azacytidine (I) stability was increased approximately 10-fold over its stability in water or lactated Ringer injection by the addition of excess sodium bisulfite and the maintenance of pH approximately 2.5.
  • (4) This time is approximately six months for the neuroleptics given orally, one month for antidepressants, and five and a half half-lives for benzodiazepines.
  • (5) After 55 days of unrestricted food availability the body weight of the neonatally deprived rats was approximately 15% lower than that of the controls.
  • (6) In the clinical trials in which there was complete substitution of fat-modified ruminant foods for conventional ruminant products the fall in serum cholesterol was approximately 10%.
  • (7) Only the approximately 2.7 kb mRNA species was visualized in Northern blots of total cellular and poly(A+) RNA isolated from cardiac ventricular muscle.
  • (8) The enzyme was solubilized by Triton X-100 and purified approximately 480-fold by gel filtration and affinity chromatography on alanine methyl ketone-AH-Sepharose 4B.
  • (9) The Cao-dependent Na+ efflux was half-maximally activated by [Ca2+]o = 2.0 mM in LiSW and 7.2 mM in Tris-SW; at saturating [Ca2+]o, [Ca2+]i, and [Na+]i the maximal (calculated) Cao-dependent Na+ efflux was approximately 75 pmol#cm2.s.
  • (10) The DNA untwisting enzyme has been purified approximately 300-fold from rat liver nuclei.
  • (11) The molecular weight of antigen RFB2 was estimated to be approximately 85,000 daltons based on the results of gel filtration on Sepharose CL-6B.
  • (12) Approximately 90% of the patients have a lambda light chain myeloma protein and almost all patients excrete Bence-Jones protein.
  • (13) With glucose and protein as intraduodenal stimulus (no pancreatin added), the plasma amino acids rose significantly less (by approximately 50% of the control experiment) and the increment in insulin (but not C-peptide) concentrations was significantly reduced by loxiglumide.
  • (14) Plasma fibrinogen decreased by approximately 7% due to hemodilution caused by plasma volume expansion.
  • (15) The estimated DNA compaction ratio (approximately 3-fold) is consistent with a significant degree of nucleosome unfolding in the hyperstimulated BR genes.
  • (16) Each species has approximately 500 core histones cluster repeats per haploid genome.
  • (17) This gene, termed cbbE', codes for a putative surface protein of approximately 55 kDa, termed the E' protein.
  • (18) The total content of both thyroid hormones in the oocytes increased throughout most of the ovarian cycle as the oocytes increased in size from less than 2 mg to approximately 6.5 mg by ovulation.
  • (19) Sonographic images of the gallbladder enable satisfactory approximation of gallbladder volume using the sum-of-cylinders method.
  • (20) Replacement of Na+ by K+ or Li+ did not alter uptake, whereas replacement of Cl- by HCO-3 or gluconate- reduced uptake by approximately 40%.