(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.
Watershed
Definition:
(n.) The whole region or extent of country which contributes to the supply of a river or lake.
(n.) The line of division between two adjacent rivers or lakes with respect to the flow of water by natural channels into them; the natural boundary of a basin.
Example Sentences:
(1) Anterior borderzone brachial paralysis (ABBP) is a hemodynamic ischemic syndrome of the watershed zone between the anterior and middle cerebral arteries.
(2) Expect growing localised tensions around specific watersheds between one ethnic group and another, between farmers and cities, and so forth, he warns: “Rather than India versus Pakistan, it’s Karnataka versus Tamil Nadu over the allocation of a river that is shared between those two states.” The Water Stress Index , produced by UK risk analysis firm Maplecroft, provides an indication where water-related conflicts might be most likely to occur.
(3) The issue was first raised by BBC2 controller Janice Hadlow and brought to the attention of the then BBC Vision director Jana Bennett – number two to BBC director general Mark Thompson – after the sitcom, which was planned for a post-9pm watershed slot, was moved to pre-watershed.
(4) Consequently, the insular ribbon effectively becomes a watershed arterial zone.
(5) But campaign groups are now convinced that they have lost the battle on the pre-watershed ban.
(6) Cerebral watershed infarctions usually occur after a period of acute and severe systemic hypotension resulting in a distinctive clinical picture.
(7) Monthly mean concentrations of dieldrin in river water and most aquatic organisms were highest in June and July, soon after aldrin had been applied to corn land in the watershed.
(8) It marked a watershed in public perceptions of Brown, and represents the biggest unforced political error in the history of New Labour.
(9) Pardew's antics will generate yet more negative headlines for a club never far from controversy for one reason or another, and the manager admits that the episode may well be a personal watershed.
(10) Last month, public discontent spilled over for the first time when Putin was booed during an appearance at a martial arts fight , an event described by analysts as a watershed moment in his rule.
(11) The oxygen extraction fraction rose with the distance from the anterior portion of the circle of Willis, attaining the highest value in the superior parietal and posterior temporo-occipital watershed area.
(12) Tc-99m HMPAO SPECT may be more sensitive than CT in the detection of infarctions in the watershed distribution.
(13) Lee Hsien Loong acknowledged that was a watershed, promising to listen to voters.
(14) In 1819, the area of Manchester then known as St Peter's Field was the scene of a watershed moment in the struggle for universal suffrage, when around 15 protesters were variously bayoneted, shot and trampled to death in the so-called Peterloo Massacre .
(15) Swine faeces from three pig farms in the La Crosse River watershed near La Crosse, Wisconsin, were sampled for Yersinia enterocolitica; 19 presumptive isolates were recovered and biochemically confirmed as Y. enterocolitica.
(16) If that happens, the Britain that votes to join the anti-Isis alliance will have crossed a post-Iraq watershed.
(17) The lesions were thought to be in the watershed areas of the regional arterial supplies, and the areas were considered to be prone to ischemia.
(18) The position of the watershed zone could be important to explain the visual field defect in anterior ischemic optic neuropathy and glaucoma.
(19) Only a few deep infarctions were watershed infarction possibly.
(20) Watershed cerebral infarcts can now be identified in stroke survivors using CT scanning.