(a.) Of or pertaining to mathematics; according to mathematics; hence, theoretically precise; accurate; as, mathematical geography; mathematical instruments; mathematical exactness.
Example Sentences:
(1) 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.
(2) On the basis of mathematical models of the obtained dose-time-effect relationship, the risk of cancer occurrence due to small carcinogen doses is predicted.
(3) Unfortunately more than three quantitative data cannot be judged simultaneously without help of mathematical methods.
(4) The kinetic properties of the cell-free extracts fit mathematical models developed for in vitro systems reconstituted from purified enzymes.
(5) All of the multivariate data were treated with mathematic method of cluster analysis.
(6) Problems of calculations and predictions on more than two particles moving are known in mathematics and physics since a long time already.
(7) The normal anatomical position of the point of junction of the superficial cerebral veins with the superior sagittal and transverse sinuses of the rat was studied with an analytical mathematical method.
(8) Such measured courses may be mathematically modelled by the so-called BATEMAN function type, an expression consisting of 2 e-function terms.
(9) This review begins with a mathematical and qualitative description of the inverse problem in terms of epicardial potentials.
(10) For both cases, mathematical expressions as proposed and used by Sager are applied.
(11) Since the four determining coefficients may change over evolutionary time-scales, the mathematical results together with a natural selection argument proves that virulence gamma 2 attenuates.
(12) The selection of optimal parameters, development of valid measurement procedures, and use of mathematical modeling and descriptive statistics are necessary for quantitative studies by ultrasound of fetal organ growth.
(13) The mathematical model clearly predicts this decrease in concentration.
(14) The ability of a mathematical model to evaluate the effects of two different pain modulating procedures (partial nerve block and vibration) on acute experimental pulpal pain was studied.
(15) A mathematical model that abstracts the major features of the vegetative life cycle of Neurosopra crassa has been developed, and the action of selection in this model and various extensions of it is such as to maintain polymorphisms of vegetative incompatibility factors.
(16) Mathematical models describing the process of the patients treatment and permitting to pronosticate the blood and urine sugar level during the treatment were developed.
(17) I used to tease him with the suggestion he had chosen me as walking companion because I had no mathematics at all and so he was safe from prying questions, but in fact now and then he did used to tell me about what he was doing – and how clear it all seemed when he spoke!
(18) A mathematical treatment and an original microcalorimetric method are developed to verify an eventual competitive binding between any two substances for the same macromolecule.
(19) By means of the method of factor-geometric analysis using a computer DVK-3, mathematic calculations of the effectiveness of the operation were made.
(20) A mathematical model of cochlear processing is developed to account for the nonlinear dependence of frequency selectivity on intensity in inner hair cell and auditory nerve fiber responses.
Quaternary
Definition:
(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.