What's the difference between entity and null?

Entity


Definition:

  • (n.) A real being, whether in thought (as an ideal conception) or in fact; being; essence; existence.

Example Sentences:

  • (1) In our opinion, a carcinologically "malignant" metastatic myxoma remains a questionable pathological entity.
  • (2) Sinus lining cells give rise to a well defined entity of neoplasia which is proposed to be termed sinus lining cell reticulosarcoma.
  • (3) Epidermolytic PPK is a well delineated autosomal dominant entity, but no recessive form is known.
  • (4) Doctors, who once treated human body as an entity, are so specialized that none seems to know any more that the head bone is still indirectly connected to the great toe.
  • (5) Pancreatic ascites is a distinct clinical entity which should be differentiated from cirrhotic, tuberculous or malignant ascites.
  • (6) Purulent bronchitis appears to be a distinct, treatable entity in patients with HIV infection and may accompany bacterial pneumonia, bronchiectasis, and P carinii pneumonia.
  • (7) The recent identification among non-Hodgkin's malignant lymphomas of a high-grade malignancy entity of possible thymic origin and defined as lymphoblastic convoluted-cell lymphoma allowed the morphologic and radiological diagnosis of nine cases of this disease.
  • (8) There is no reason to describe deafness and deafmutism in an area with severe endemic goitre as a separate entity.
  • (9) This finding is consistent with the hypothesis that the majority of deaths attributed to presenile dementia and the majority of deaths from senile dementia are the result of the same disease entity.
  • (10) This condition is a clearly defined radiological and clinical entity.
  • (11) On radiographs, this entity usually presented as clusters of 1- to 3-mm plaques raised above the smooth and featureless duodenal mucosa; this was seen in 17 (68%) of 25 patients.
  • (12) Although these two destructive entities are completely different in many respects, they share a common denominator: the initial lesions are brought about by an aggregate of bacteria known as plaque.
  • (13) The literature on this uncommon syndrome was reviewed and it was found that there are an open prevalence of this entity in children younger than 15 years, as well as severe respiratory complications in affected patients.
  • (14) Autism is a heterogeneous disease entity containing different clinical subgroups, which do not manifest similar radiologic pictures.
  • (15) This appears to be a newly described entity, although it resembles a Becker's nevus without hypertrichosis or an typical cafĂ© au lait spot.
  • (16) The familial association of epilepsy and cleft lip with or without cleft palate (CL (P)) is analyzed assuming both entities share common genetic predisposing factors.
  • (17) Data in the literature reveal that two distinct entities do not exist, but that there is instead a continuous transition from low to normal values.
  • (18) Sinus histiocytosis with massive lymphadenopathy is a distinct clinical entity, with ophthalmic involvement in 10% of patients.
  • (19) The histological examination of the biopsies taken during colonoscopy differentiated less clearly between these two entities than the macroscopic judgement by the endoscopist.
  • (20) The different entity of reversibility of bronchial obstruction is due to the various mechanisms intervening in different patients.

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.