(a.) Consisting of four; by fours, or in sets of four.
(a.) Later than, or subsequent to, the Tertiary; Post-tertiary; as, the Quaternary age, or Age of man.
(n.) The number four.
(n.) The Quaternary age, era, or formation. See the Chart of Geology.
Example Sentences:
(1) The quaternary structure of ribonucleotide reductase of Escherichia coli was investigated, with the use of purified B1 and B2 proteins and bifunctional cross-linking agents.
(2) The sensitivity of an indirect fluorescent antibody (IFA) test (screening test) for the detection of antibodies to cytomegalovirus (CMV) was examined by using 128 serum specimens and quaternary aminoethyl (QAE)-Sephadex A50 column chromatography to separate IgM from IgG class antibodies.
(3) Modifications in quaternary structure induced by variation of these physicochemical parameters were followed by means of X-ray and quasi-elastic light-scattering and quantified in terms of weight average molecular weight (M), radius of gyration (Rg) and hydrodynamic radius (Rh).
(4) These features of the new quaternary structure, denoted Y, may therefore be representative of quaternary states that occur transiently along pathways between the normal unliganded, T, and liganded, R, hemoglobin structures.
(5) On the other hand, the lack of any twitch-potentiating effect by naloxone methylbromide, a quaternary derivative of naloxone, suggests that opioids which potentiate the twitch must enter the lipid phase of the membrane to act.
(6) Two additional quaternary ammonium compounds, tetraethylammonium and N1-methylnicotinamide, were not significantly bound to either tissue.
(7) These effects are due to residual silanols on the surface of the column material and may be remedied by adding suitable amines or quaternary ammonium ions to the eluent as anti-tailing agents.
(8) A quantitative thin layer chromatographic (TLC) method has been developed for determination of the antiarrhythmic quaternary ammonium compound N,N-bis (phenylcarbamoyl methyl) dimethylammonium chloride (QX-572) in biological materials.
(9) While currently available antiarrhythmic agents fail to achieve the desired effect, the recent evidence dealing with the quaternary ammonium derivatives of propranolol, lidocaine, and bretylium provides some hope for the future development of drugs with antiarrhythmic as well as antifibrillatory properties which may provide a therapeutic approach to the prevention of SCD.
(10) In case of non hydrolyzing salts, the quaternary ammonium bromide salts it could not surely be proved by the applied methods whether primary ion exchange had been followed by secondary ion exchange or only primary ion exchange had occurred.
(11) Naloxone methobromide (naloxone MB), a quaternary compound, was also effective in antagonising this effect of nalbuphine but was less effective than naloxone hydrochloride.
(12) Temperature, protein tertiary and quaternary structure, chain heterogeneity, and ligand rebinding subsequent to CO photolysis all affect the line width and position of this transition.
(13) Iodine-containing solutions and quaternary ammonium compounds rarely sensitize.
(14) Administration of the quaternary derivative, neostigmine, indicated that the effects of scopolamine at 22 days were probably central in origin.
(15) The relationships between thermodynamic quantities in a quaternary system of electrolytes are discussed in Appendix 2.
(16) Liquid crystals possess high density packing of DNA molecules complexed with quaternary ammonium salt of oligomer-25 conidin.
(17) Its quaternary dimethyl derivative, designated as pranolium was firstly prepared by Lucchesi.
(18) On the basis of these structural studies, we discuss the relationships between the conformational differences in the allosteric site and the small changes in the quaternary structure within the T form to the possible mechanisms for CTP inhibition and ATP activation.
(19) N,N-dimethylanatoxin (DMAnTX), the quaternary derivative of the potent nicotinic agonist (+)-anatoxin-a (AnTX), has been evaluated for potency and efficacy at nicotinic acetylcholine receptors of frog motor endplates and Torpedo electric organs.
(20) Reaction of the thiol reagent 5,5'-dithio-bis(2-nitrobenzoic acid) (Nbs2) with the brain-specific protein S-100 favours stabilization of the quaternary structure of the protein via disulfide bond formation.
Tertiary
Definition:
(a.) Being of the third formation, order, or rank; third; as, a tertiary use of a word.
(a.) Possessing some quality in the third degree; having been subjected to the substitution of three atoms or radicals; as, a tertiary alcohol, amine, or salt. Cf. Primary, and Secondary.
(a.) Later than, or subsequent to, the Secondary.
(a.) Growing on the innermost joint of a bird's wing; tertial; -- said of quills.
(n.) A member of the Third Order in any monastic system; as, the Franciscan tertiaries; the Dominican tertiaries; the Carmelite tertiaries. See Third Order, under Third.
(n.) The Tertiary era, period, or formation.
(n.) One of the quill feathers which are borne upon the basal joint of the wing of a bird. See Illust. of Bird.
Example Sentences:
(1) The purpose of this study was to define risk factors for nosocomial candidemia in adult patients without leukemia at a tertiary care medical center.
(2) injection of the tertiary amine cholinesterase inhibitor physostigmine (17-70 micrograms kg-1) induced a prompt, sustained and dose-dependent improvement of cardiovascular and respiratory function, with marked increase in the volume of circulating blood and survival of all treated animals, at least for the 2 h of observation.
(3) The measurement procedure should define preanalytical requirements and be based upon traceability from tertiary and secondary reference materials with reference procedure values to primary reference materials.
(4) The expression of such secondary and tertiary syphilis is commonly masked and distorted by the long-term effects of subcurative doses of antibiotics; in fact, late latent and tertiary syphilis produce symptoms and immunosuppression similar to the profile of AIDS.
(5) It is suggested that lung ventilation takes place in the avian embryo in three distinct stages: the major air-ways become aerated, then respiratory movements begin and lastly the tertiary bronchi are slowly aerated.
(6) The disappearance of this band on heating and at high pH was ascribed to the adoption by the telopeptide of a specific tertiary structure.
(7) To demonstrate the feasibility of the approach tRNA was represented as a simple undirected graph containing all relevant information represented in the usual cloverleaf secondary structure and nine base-base tertiary interactions.
(8) The use of Fab fragments in conjunction with Fab-specific secondary and tertiary antisera improved tissue penetration and made it possible to identify a number of the immunoreactive neurons.
(9) At the 200 rad level, the mouse with normal karyotype was compared with the T(1;13)70H translocation heterozygote and the Ts(1(13))7OH tertiary trisomic of normal appearance.
(10) Transmembrane proteins serve important biological functions, yet precise information on their secondary and tertiary structure is very limited.
(11) The participants were divided into seven groups in accordance with their main lines of work: professors, administrative personnel, doctors at the primary, secondary and tertiary care level, residents, and medical students.
(12) With the growing number of dialyzed patients, secondary (sHPT) and tertiary hyperparathyroidism (tHPT) are assuming increasing importance.
(13) Establishing direct lines of communication between the practicing physician and the tertiary center and emphasizing continuing education at all levels seem to be important aspects in the development and maintenance of such a referral system.
(14) A similar transient decrease in 80K mRNA levels was also demonstrated in tertiary cultures of mouse embryo fibroblasts.
(15) These results suggest that the secondary structure of interleukin-2(Ala125) does not require tertiary structure.
(16) The absence of chemical reactivities and cobra venom nuclease sensitivity in the terminal loops of helices 6 and 12 indicate a tertiary interaction unique to HeLa 18S rRNA.
(17) Ultraviolet photocrosslinks seen only in the 30 S particle are likely to be tertiary structure contacts.
(18) As the tertiary test, inhibitors with molecular weights under 1,000 were selected by passage through a Diaflo UM-2 membrane.
(19) The pediatrician is instrumental in identifying potential candidates for epilepsy surgery and referring them to a tertiary-care epilepsy center.
(20) Performance of renal transplants in children frequently necessitates transfer of patients from the care of a local pediatric nephrologist to a regional, tertiary care center that is specially equipped to carry out organ transplantation.