What's the difference between certain and pertain?

Certain


Definition:

  • (a.) Assured in mind; having no doubts; free from suspicions concerning.
  • (a.) Determined; resolved; -- used with an infinitive.
  • (a.) Not to be doubted or denied; established as a fact.
  • (a.) Actually existing; sure to happen; inevitable.
  • (a.) Unfailing; infallible.
  • (a.) Fixed or stated; regular; determinate.
  • (a.) Not specifically named; indeterminate; indefinite; one or some; -- sometimes used independenty as a noun, and meaning certain persons.
  • (n.) Certainty.
  • (n.) A certain number or quantity.
  • (adv.) Certainly.

Example Sentences:

  • (1) One hour after direct mechanical cardiomassage (DMCM) a moderately pronounced edema of the intercellular spaces in the basal compartment of the seminiferous epithelium, normal content of lactate and succinate dehydrogenases, and a certain decrease in the activity of glucose-6-phosphate dehydrogenases and NAD- and NADP-diaphorases were noted.
  • (2) Work on humoral responses has focused on lysozyme, the hemagglutinins (especially in the oyster), and the clearance of certain antigens.
  • (3) Stress is laid on certain principles of diagnostic research in the event of extra-suprarenal pheochromocytomas.
  • (4) As a group, the three mammalian proteins resemble bovine serum conglutinin and behave as lectins with rather broad sugar specificities directed at certain non-reducing terminal N-acetylglucosamine, mannose, glucose and fucose residues, but with subtle differences in fine specificities.
  • (5) A segment of vas deferens was transplanted to the contralateral deferens with the intention of improving treatment for certain cases of infertility caused by obstruction.
  • (6) hypoglossal nucleus), whereas in other areas the angiotensinogen gene was expressed only in a certain population of glial cells.
  • (7) The following conclusions emerge: (i) when the 3' or the 3' penultimate base of the oligonucleotide mismatched an allele, no amplification product could be detected; (ii) when the mismatches were 3 and 4 bases from the 3' end of the primer, differential amplification was still observed, but only at certain concentrations of magnesium chloride; (iii) the mismatched allele can be detected in the presence of a 40-fold excess of the matched allele; (iv) primers as short as 13 nucleotides were effective; and (v) the specificity of the amplification could be overwhelmed by greatly increasing the concentration of target DNA.
  • (8) Certainly, Saunders did not land a single blow that threatened to stop his opponent, although he took quite a few himself that threatened his titles in the final few rounds.
  • (9) We present a mathematical model that is suitable to reconcile this apparent contradiction in the interpretation of the epidemiological data: the observed parallel time series for the spread of AIDS in groups with different risk of infection can be realized by computer simulation, if one assumes that the outbreak of full-blown AIDS only occurs if HIV and a certain infectious coagent (cofactor) CO are present.
  • (10) HDAra-C in combination with anthracyclines is now considered to be a treatment which may afford some hope of a cure in a certain percentage of cases of adult acute non-lymphocytic leukemia.
  • (11) These results suggest that a certain minimum level of expression of c-myc is required for the maintenance of ras transformation in NIH 3T3 cells.
  • (12) This "paradox of redistribution" was certainly observable in Britain, where Welfare retained its status as one of the 20th century's most exalted creations, even while those claiming benefits were treated with ever greater contempt.
  • (13) In certain cases, the effects of these substances are enhanced, in others, they are inhibited by compounds that were isolated from natural sources or prepared by chemical synthesis.
  • (14) Accumulating evidence indicates that for most tumors, the switch to the angiogenic phenotype depends upon the outcome of a balance between angiogenic stimulators and angiogenic inhibitors, both of which may be produced by tumor cells and perhaps by certain host cells.
  • (15) The findings indicate that these spaces were lined by a lipid monolayer which formed bilayered lamellae under certain conditions.
  • (16) Positive feedback effects on serum gonadotrophins in castrates were observed following injection of certain doses of some steroids.
  • (17) Hence, presence of IgG rheumatoid factor correlated positively with the presence of rheumatoid disease, and evidence was established that certain features of rheumatoid inflammation occur in dental periapical lesions of many patients with rheumatoid disease.
  • (18) The typology developed in two previous surveys of illicit heroin products is applicable to many of the samples studied in this work, although significant changes have occurred in the chemical profile of illicit heroin products from certain geographical regions.
  • (19) The presence of an inverse correlation between certain tryptophan metabolites, shown previously to be bladder carcinogens, and the N-nitrosamine content, especially after loading, was interpreted in view of the possible conversion of some tryptophan metabolites into N-nitrosamines either under endovesical conditions or during the execution of the colorimetric determination of these compounds.
  • (20) An electrogenic sodium-potassium pump appears to contribute materially to the steady-state potential and to certain of the transient potential responses of vascular smooth muscle.

Pertain


Definition:

  • (v. i.) To belong; to have connection with, or dependence on, something, as an appurtenance, attribute, etc.; to appertain; as, saltness pertains to the ocean; flowers pertain to plant life.
  • (v. i.) To have relation or reference to something.

Example Sentences:

  • (1) The main clinical features pertaining to the concept of the "psycho-organic syndrome" (POS) were investigated in a sample of children who suffered from severe craniocerebral trauma.
  • (2) testosterone, fentanyl, nicotine) may ultimately be administered in this way, important questions pertaining to pharmacology (tolerance), toxicity (irritation, sensitisation) and dose sufficiency (penetration enhancement) remain.
  • (3) Intoxications arising from therapeutic activities pertaining to this cult are of the same kind as those encountered in the practice of Modern Medicine.
  • (4) We conclude that the procedure used in this study is a non-intrusive intervention that is an extension of the current literature pertaining to sensory extinction.
  • (5) Utilizing standardized instruments, family and demographic predictors of general and problem-solving knowledge pertaining to diabetes were identified in 53 newly diagnosed children.
  • (6) This paper reviews the epidemiologic studies of petroleum workers published in the English language, focusing on research pertaining to the petroleum industry, rather than the broader petrochemical industry.
  • (7) We have attempted to provide an overview of the Food, Drug, and Cosmetic Act as it pertains to animal drugs and feed additives.
  • (8) While RT is regarded as a major treatment innovation in psychiatry, nonpsychiatrists are reluctant or unaware of the uses of antipsychotic medication as it pertains to RT.
  • (9) The specific problems addressed pertain to the storage and retrieval of historical information, physical signs and diagnosis.
  • (10) Little information is available pertaining to infectious morbidity in women with genital malignancy.
  • (11) Also, it is proposed that the latent content of the personal myth pertains to traumatic experiences and conflictual wishes related to either or both the oedipal and the pre-oedipal phase of development.
  • (12) Therefore, the plantar forces acting under the metatarsal heads of the 1st, 2nd and 5th rays and under the pads of the 1st and 2nd toes were measured during walking, so that with the aid of anthropometric information pertaining to the forefoot, reaction forces in the flexor tendons and in the joints could be estimated.
  • (13) This paper challenges the present policy on two grounds: consent from adults who donate kidneys is generally not informed, and therefore it is inconsistent to use the consent requirement as a justification for excluding children; and renal donation by adults can be seen as a procedure done for the benefit of the donor (as well as the recipient), and the appropriate rules for using children as donors should therefore be those pertaining to beneficial intrusions on nonconsenting subjects.
  • (14) The basic principles needed for understanding these syndromes are the same as those that pertain to adults; however, the etiologic factors are quite different.
  • (15) Rauschia gen. nov. (type species: R. triangularis) is created for species previously pertaining to Nematodirus parasite of Lagomorpha, and in which the synlophe, very complex, differs from the synlophe of the parasite of Ruminants.
  • (16) It has been argued that linguistic usage pertaining to female sexuality generally is the product of a patriarchal value structure and, as such, reflects patriarchal prejudices about female sexuality.
  • (17) In both non-aligned and head-aligned modes, subject instructions pertaining to the second target light concerned only gaze; there was no requisite head position.
  • (18) A systematic study including morphologic, histologic, pathologic aspects of dens evaginatus was carried out and data were compared with those given in previous reports pertaining to dens evaginatus in other Asian countries.
  • (19) Population demographics and data pertaining to visits to other emergency departments were obtained.
  • (20) The averaged anesthetized alignment pertained to the whole group of 6.2 prism diopters of esotropia, which correlated poorly with the preoperative deviation.