(a.) Standing out or above any surface; protruded.
(a.) Still existing; not destroyed or lost; outstanding.
(a.) Publicly known; conspicuous.
Example Sentences:
(1) There is extant a population of subjects who have average or better than average interpretive reading skills as measured by standardized tests but who read slowly and inefficiently.
(2) For example, most large extant lizards are herbivorous.
(3) Whereas all extant vertical clingers and leapers share certain femoral traits (i.e., long femur, proximally restricted trochanters, ventrally raised patellar articular surface), Galagidae and Tarsiidae share features of the proximal femur (i.e., cylindrical head, large posterior expansion of articular surface onto the neck) that clearly distinguish them from the specialized leapers of the Malagasy Republic (Indriidae and Lepilemur).
(4) This method provides an improvement in sensitivity over extant spectrophotometric methods and circumvents limitations of assays using radioactive pyruvate.
(5) His data also indicate that the supraorbital region in extant humans cannot be accurately modeled as a beam.
(6) On the basis of morphophysiologic relationships in extant populations, it can be assumed that mean annual osteonal creation frequency, and mean annual Haversian bone formation rate can be reliably determined in extinct populations.
(7) The older listener performance measures were compared with extant data from 20 normally hearing young adult listeners (mean age = 22 years).
(8) These findings suggest that thyroxine-potentiated mitogenesis promotes greater numbers of new motor neurons to the LMC while, simultaneously, target removal delays the loss of extant cells.
(9) Jeletzkya douglassae Johnson and Richardson is described as the oldest known representative of an extant squid group.
(10) Photoperiod-mediated differential responsiveness to 6-MBOA indicates that female house mice can discriminate long from short days, and these results suggest that the physiological mechanisms for photoperiodic responsiveness remain extant in this species previously characterized as nonphotperiodic.
(11) We derive twelve postulates, eight relating to the earliest vertebrate skeletogenic and odontogenic tissues and four relating to the development of these tissues in extant vertebrates and extrapolate the developmental data back to the evolutionary origin of vertebrate skeletogenic and odontogenic tissues.
(12) The numbers and local sequence environments of the two types of substitution mutation plus additions and deletions have been obtained directly in this study from differences between a large number of extant primate gene and pseudogene sequences.
(13) BP), and both resemble humans most closely among extant hominoids.
(14) The count of publications on geometric-optical illusions and the bibliography of extant books on the topic are brought up to date.
(15) Molecular modelling studies could not identify structural features of the aphidicolin-dCTP "overlap" that is unique to dCTP, relative to the remaining dNTPs, and that is consistent with the extant structure-activity data.
(16) The digital unit is compatible with all the extant radiographic equipment in our department and automatically supplies two images, the first one resembling a conventional radiograph, the second one characterized by a broader exposure range that allows a clear visualization of soft tissues.
(17) These data come from extant hosts and from paleobiogeography.
(18) Similarly, we have detected Amerindian genes, such as LDHB--Gua and TFchi, in proportions that relate this population with the extant Ngawbé (Guaymí).
(19) The central nervous system location of neurochemicals that are widely distributed among extant animals may give us clues to changes that occurred in the brains of these animals during evolution.
(20) Today all patients are alive and 7 present no recurrences of HCC on US and CT scans; the follow-up period was 18 months for 3 patients and 12, 9, 6, and 3 months for the extant 4 patients, respectively.
Extinct
Definition:
(a.) Extinguished; put out; quenched; as, a fire, a light, or a lamp, is extinct; an extinct volcano.
(a.) Without a survivor; without force; dead; as, a family becomes extinct; an extinct feud or law.
(v. t.) To cause to be extinct.
Example Sentences:
(1) The stages of mourning involve cognitive learning of the reality of the loss; behaviours associated with mourning, such as searching, embody unlearning by extinction; finally, physiological concomitants of grief may influence unlearning by direct effects on neurotransmitters or neurohormones, such as cortisol, ACTH, or norepinephrine.
(2) The effect upon ethanol responding was found not to resemble a pattern of extinction, but rather was best described as a general overall reduction in responding.
(3) In a recent study, Orr and Lanzetta (1984) showed that the excitatory properties of fear facial expressions previously described (Lanzetta & Orr, 1981; Orr & Lanzetta, 1980) do not depend on associative mechanisms; even in the absence of reinforcement, fear faces intensify the emotional reaction to a previously conditioned stimulus and disrupt extinction of an acquired fear response.
(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) After 40 programmed minutes of acquisition and 12 min of maintenance, without notice, both schedules changed to extinction for 28 min.
(6) This differential absorbance is linear with increasing concentrations of Na2MoO4 and was used to calculate the molar extinction coefficient of molybdochelin at 425 nm (epsilon similar to 6,200).
(7) However, during massed testing, all subjects trained with response contingent CS termination showed an overall extinction influence, which was most pronounced in the medial subgroup, although the laterals showed frequency control as well.
(8) When reinforcement for competing behavior was withdrawn, however, rats resumed their original behavior and there were no overall savings in total responses to extinction.
(9) The relative amount of the crystals was measured in both amoeba strains on the basis of the integral extinction value.
(10) Chronic extinction of chain closed conditioned reflex in intact rabbits took five to six days.
(11) The amounts of phosphatidylcholine and sphingomyelin could be determined by high-performance liquid chromatography and ultraviolet absorption if the apparent extinction coefficient of the material analyzed was established.
(12) In a number of neurones the extinction of reflexes either does not change the reaction to acetylcholine, or enhances it.
(13) In Experiment 3, following an unsignaled reinforcement delay, groups receiving either no event or signaled food in the context responded faster in extinction than groups receiving no context exposure or unsignaled food.
(14) The optical extinction decreases as the red cell agglutinates grow, giving a parametric estimate of the haemagglutination rate.
(15) By calculating for DNA standard solutions the value of the ratio between the extinction at 665 nm after 15 min to the extinction of 600 nm after 2 min of the orcinol reaction it is possible to increase specifiaty of the orcinol method for determination of the RNA content.
(16) To lose the Sundarbans would be to move a step closer to the extinction of these majestic animals," said ZSL tiger expert Sarah Christie.
(17) Values obtained for thebuoyant density, isoelectric point, and extinction coefficient differed minimally; major differences were observed in the molecular weight and the characterisitc width of cylinders formed by in vitro-assembled T-layer of the wild-type and variant.
(18) The CS+ preference persisted for several weeks during extinction tests when both the CS+ and CS- were paired with IG water or with no infusions.
(19) The extinction coefficient at 550 nm for the oxidized enzyme is about 5300 (M subunit)-1 X cm-1.
(20) On this planet, extinction is the norm – of the 4 billion species ever thought to have evolved, 99% have become extinct.