What's the difference between null and roundel?

Null


Definition:

  • (a.) Of no legal or binding force or validity; of no efficacy; invalid; void; nugatory; useless.
  • (n.) Something that has no force or meaning.
  • (n.) That which has no value; a cipher; zero.
  • (v. t.) To annul.
  • (n.) One of the beads in nulled work.

Example Sentences:

  • (1) Measurements of acetylcholine-induced single-channel conductance and null potentials at the amphibian motor end-plate in solutions containing Na, K, Li and Cs ions (Gage & Van Helden, 1979; J. Physiol.
  • (2) DR(+) cells, however, showed no change in percentage and a lesser drop in absolute numbers, suggesting an increase with advancing disease of DR(+), Ig(-) null cells, which may represent immature B cell precursors.
  • (3) In this report we describe an improvement upon the design by Stanton and Lightfoot for a simple photographic null method to determine the kVp of a diagnostic region x-ray source.
  • (4) At least two (Rh null and the McLeod type) are responsible for congenital hemolytic disorders.
  • (5) (2) Sequences of brightness steps of like polarity (either increments or decrements) elicit positive and negative motion-dependent response components when mimicking motion in the cell's preferred and null direction, respectively.
  • (6) The analysis also involved statistical tests of a modified null hypothesis, the generation of confidence intervals (CIs) and a meta-analysis.
  • (7) The null potential of both responses became more and less negative with a decrease and an increase, respectively, in the extracellular potassium concentration.
  • (8) The null mutation of algR was generated in a mucoid derivative of the standard genetic strain PAO responsive to different environmental factors.
  • (9) Endoneurial fluid pressure (EFP) was recorded by an active, servo-null pressure system after a glass micropipette was inserted into rat sciatic nerve undergoing wallerian degeneration.
  • (10) In thymo-deprived mice (nude mice and B mice) the percentage of null cells increases during the stage of regeneration, and B mice develop a large number of Ig +-bearing cells.
  • (11) Alkaline phosphatase activity was elevated in the lymphocytes from T-CLL, cord blood and tonsils and the blast cells from Null-ALL.
  • (12) Analysis of ldlA cells has identified three classes of mutant alleles at the ldlA locus: null alleles, alleles that code for normally processed receptors that cannot bind LDL, and alleles that code for abnormally processed receptors.
  • (13) Putative null sup-38 mutations cause maternal-effect lethality which is rescued by a wild-type copy of the locus in the zygote.
  • (14) Null cells of patients with hypoplastic anemia did not produce erythroid colonies under any culture conditions.
  • (15) Comparison of simulated versus actual inheritance data demonstrates that the so-called null structural alleles actually produce functional globins.--The genetic controls in Peromyscus may be analogous to those in primates.
  • (16) A null zone and associated sudden phase-reversal of RSA were observed in stratum lucidum of CA3.
  • (17) When the stimulus is placed at a position approximately 80 degrees dorsal to the eye axis, there is no response; this area is called the null region.
  • (18) Northern blot analysis showed that Adh-1 mRNA was synthesized at wild-type levels in immature seeds of the null mutant, but dropped to 25% in mature seeds.
  • (19) Two tumours were null cell adenomas with PIs less than 0.1 and 0.2%.
  • (20) Thus this methodology offers the potential to study naturally occurring ADH electromorphs and null alleles independent of enzymatic activity assays.

Roundel


Definition:

  • (a.) A rondelay.
  • (a.) Anything having a round form; a round figure; a circle.
  • (a.) A small circular shield, sometimes not more than a foot in diameter, used by soldiers in the fourteenth and fifteenth centuries.
  • (a.) A circular spot; a sharge in the form of a small circle.
  • (a.) A bastion of a circular form.

Example Sentences:

  • (1) Just as the Roman legions carried their eagle and Christian missionaries had the cross, so the TfL roundel will be raised proudly in parts of the suburban rail network that never saw it before.
  • (2) Lights started to come on behind the gammariya, the roundel windows of stained glass, casting jewelled shadows on the ground below.
  • (3) Roundell is a former head of Impressionist and Modern Pictures at Christie’s, whose sales of masterpieces have included Van Gogh’s Sunflowers, which broke the then record for a work of art when it sold in 1987 for nearly £25m.
  • (4) "This is a painting that has everything," says James Roundell of Dickinson, the dealer that will handle the sale for an anonymous private collector.
  • (5) This included the Korean name of the DPRK written in a stylised Hangul font and a new logo on the tail, featuring a roundel like that of the KPA Air Force – albeit with different proportions – flanked by a blue, stylised bird-of-prey .
  • (6) Research into Le Moulin d’Alphonse was conducted by James Roundell and Simon Dickinson, British art dealers, in collaboration with the Van Gogh Museum in Amsterdam.
  • (7) The system that we propose comprises continuous circular capsulorhexis (Neuhann and Gimbel), hydrodelamination (Brint), roundel phacoemulsification (Hara and Hara), new IOL designs, and intraoperative extensive lens epithelial cell removal.