What's the difference between fortuitous and null?

Fortuitous


Definition:

  • (a.) Happening by chance; coming or occuring unexpectedly, or without any known cause; chance; as, the fortuitous concourse of atoms.
  • (a.) Happening independently of human will or means of foresight; resulting from unavoidable physical causes.

Example Sentences:

  • (1) Fortuitous withdrawal of therapy and transplant nephrectomy may have been responsible for the patient's survival.
  • (2) Two major facilities of the Western Division of Dow Chemical USA are located fortuitously within an area covered by the population-based California Tumor Registry, which allowed linkage of records to identify incident cancers among 1,403 male workers.
  • (3) The unusual activity of IM effector preparations against HLA-mismatched LCLs arises from fortuitous cross-recognition of allogeneic cells by immunologically specific cytotoxic T cell clones coincidentally expanded in vivo alongside the EBV-specific response.
  • (4) Because there is no known nut site cis to 'trpA, we suggest that the 'trpA segment itself fortuitously contains a nut sequence that is able to function with excess N of any of the types tested and with either NusAEc or NusASal.
  • (5) Because of this phenomenon it is difficult to distinguish whether a given protein's presence in bone is advantageous or merely fortuitous.
  • (6) The enhanced transposition frequency of Tn917-LTV1 and Tn917-LTV3 (about 100-fold in Bacillus subtilis) is believed to be due to the fortuitous placement of vector-derived promoters upstream from the Tn917 transposase gene.
  • (7) According to their different clinical presentations, patients were divided into 4 groups: 1: Documented cancer, 2: Hepatic cirrhosis, 3: Fortuitous ultrasonic detection, 4: Clinical hepatic tumor.
  • (8) The article describes a way to estimate the probability of the clustering being fortuitous.
  • (9) The age correlation was caused only by an attenuated response in the young subjects below 40 years of age and may be fortuitous.
  • (10) The somewhat fortuitous isolation of Nocardia asteroides and its significance are discussed.
  • (11) However, it seems that the reduced incidence of the AUV discovered by a few Italian authors is not fortuitous (genetic factors?
  • (12) It is easy to point to lines that have a fortuitous topicality: knowing chuckles now greet George's admission that "There's a sense in which I even quite like a war", and later suggestion that, if Labour can't beat the Tories, the best solution is to join them.
  • (13) Endobronchial localizations of the granular cell tumours or Abrikossoff's tumour are very rare (6%) but their association with malignant tumours is exceptional and perhaps fortuitous.
  • (14) These T-ALLs may represent a fortuitous transformation of T cell subsets with alternative T3-Ti complexes.
  • (15) Gender identity change in a conservatively diagnosed 21-year-old transexual after faith healing was fortuitously observed, was objectively and independently measured, and is reported.
  • (16) Although the pathogenesis remains unclear, three possible explanations are suggested: disturbance of the pluripotent stem cell resulting in a combined myeloplasmatic disorder, coexistence of two diseases, or a fortuitous association.
  • (17) This tumour was discovered in a systematic fashion in 8 of the 10 cases and fortuitously in one.
  • (18) In addition, we found, fortuitously, that the ligated DNA circles could also integrate by homologous recombination, although usually at a much lower frequency than the Int-mediated integration into attB.
  • (19) Their coexistence in our patient, although the statistic probability is very low, seems to be a fortuitous coincidence more than the result of a common genetic and pathogenetic mechanism.
  • (20) It is not known whether the conversion of a portion of S5 to S5a is physiological or fortuitous.

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.