(n.) Beating or palpitation; as, the saltation of the great artery.
(n.) An abrupt and marked variation in the condition or appearance of a species; a sudden modification which may give rise to new races.
Example Sentences:
(1) By the use of time-lapse microscopy to locate saltating particles prior to fixation and histochemical examination of the cells, structures of several kinds have been shown to move in this manner.
(2) Middlesevere cases (Hb 9-15 g%) showed in 57.2% an undulating and in 42.8% a saltatoring types of oscillation.
(3) The change in the orientation of pigment granule saltations following fertilization requires both a transient increase in the cytoplasmic concentration of Ca2+ and an elevation of cytoplasmic pH.
(4) Saltations in the unfertilized egg are very non-radial and are as likely to be directed toward the cortex as away.
(5) However, the appearance of saltations in such simple systems suggests that their appearance in a process as complex as biological evolution is not surprising.
(6) Bidirectional saltations are seen along the long axes of fully spread cells.
(7) The previous result of Rasminsky & Sears (1972) of delayed saltation in demyelinated nerve fibres was confirmed.
(8) In cases of severe fetal anemia (Hb less than 9 g%) we found at 64.2% a silent to narrowed undulating and at 21.4% saltatoring types of oscillations.
(9) It is suggested that such saltations may not represent more rapid rates of evolution but, rather, the persistence of evolutionary change in a given direction for a longer than normal period.
(10) Quantitation of vesicle saltations before and after fertilization demonstrates that while there is no significant difference in the speed or path-length of vesicle movement, there is a dramatic change in the orientation of these saltations.
(11) Immediately after injection, cells were recorded with a time-lapse video imaging system; later analysis of the tapes revealed that particles in cells injected with one of these antibodies (CG1, specific for CEF tropomyosin isoforms 1 and 3) showed a dramatic decrease in instantaneous speed while moving, distance moved per saltation, and proportion of time spent in motion.
(12) Saltations appear as a natural dynamical behavior in the evolution of simplistic information processing networks.
(13) Thus the 'larger vesicles' stopped moving at 25 degrees C, the small ones did not; both stopped at 18 degrees C. The 'small vesicles' continued to move actively after cell uptake of the polyanion poly-D-glutamic acid, while the saltations of the 'larger vesicles' were markedly slowed; both sets of vesicles stopped after uptake of ammonium chloride.
(14) Sequencing has revealed that the spacer DNA of X. laevis contains different kinds of simple DNA sequences, but no evidence has been found that spacer DNA once arose by saltation of a 15 bp segment.
(15) vignae revealed three categories of movement: a) general movement of cytoplasm, plus organelles, into the developing portions of the fungus during which the nuclei, in particular, maintained their characteristic position with remarkable constancy, b) relatively slow movements of various organelles such that they became displaced relative to one another and to the growing fungal tip, and c) erratic, rapid, saltations of small organelles over short distances.
(16) The co-transport of spectrin, actin, and calmodulin with cytomembranes undergoing rapid saltations departs from reported results of radioactive labeling experiments insofar as spectrin, actin, and calmodulin are not normally associated with rapidly transported membrane components in the latter studies.
(17) This transition must reflect underlying changes in the cellular structures necessary for pigment granule saltations.
(18) Trichocyst saltations end with either cortical insertion of the organelle, or return to cyclosis.
(19) Using acridine orange as a vital stain for acidic organelles, in combination with video-enhanced fluorescence microscopy, and subsequent immunolabeling with rabbit antibodies against ACTH, we have shown that these secretory granules move by saltations along the processes.
(20) This is the saltation phenomenon, and as presented in this theoretical note, it is a phenomenon which is easily accommodated by a theoretical rotation of space-time axes.
Transition
Definition:
(n.) Passage from one place or state to another; charge; as, the transition of the weather from hot to cold.
(n.) A direct or indirect passing from one key to another; a modulation.
(n.) A passing from one subject to another.
(n.) Change from one form to another.
Example Sentences:
(1) Clinical signs of disease developed as early as 15 days after transition to the experimental diets and included impaired vision, decreased response to external stimuli, and abnormal gait.
(2) We conclude that first-transit and blood-pool techniques are equally accurate methods for determining EF when the time-activity method of analysis is employed.
(3) The high transition enthalpy for kerasin is ascribed to a lesser accommodation of gauche conformers in the hydrocarbon chains just below the transition temperature.
(4) Local embolism, vertebral distal-stump embolism, the dynamics of hemorrhagic infarction and embolus-in-transit are briefly described.
(5) Each profile is described by a simple sequence of band transitions (BT-sequence).
(6) These two types of transfer functions are appropriate to explain the transition to anaerobic metabolism (anaerobic threshold), with a hyperbolic transfer characteristic representing a graded transition; and a sigmoid transfer characteristic representing an abrupt transition.
(7) In addition to the phase diagrams reported here for these two binary mixtures, a brief theoretical discussion is given of other possible phase diagrams that may be appropriate to other lipid mixtures with particular consideration given to the problem of crystalline phases of different structures and the possible occurrence of second-order phase transitions in these mixtures.
(8) Biotin-avidin immunoperoxidase analysis for hCG was performed on all paraffin blocks containing carcinoma-in-situ, grade I, grade II, and grade III transitional cell carcinoma.
(9) The growth of transitional epithelial cells with different growth media and growth supports was examined.
(10) Subthreshold concentrations of the drug to induce complete blockade (5 x 10(-8)M) allowed to observe a greater depression of bioelectric cell characteristics in primary than in transitional fibres.
(11) The B cell epitopes included regions of transition between the more hydropathic (including the N-terminal end of the F1 and F2 protein) and hydrophilic sequences.
(12) There was no correlation between disturbed gastric clearance, impaired gall bladder contraction, and prolonged colonic transit time in the patients with cardiovascular autonomic neuropathy nor was there a correlation between any disturbed motor function and age or duration of diabetes.
(13) In addition, transitional macrophages with both positive granules and positive RER, nuclear envelope, negative Golgi apparatus (as in exudate- resident macrophages in vivo), and mature macrophages with peroxidatic activity only in the RER and nuclear envelope (as in resident macrophages in vivo) were found.
(14) Interphase death thus involves a discrete, abrupt transition from the normal state and is not merely the consequence of progressive and degenerative changes.
(15) Sialosyl-Tn antigen expression also was observed in intestinal metaplasia of the stomach and in transitional mucosa adjacent to the colorectal carcinoma, which are considered to be cancer-related lesions.
(16) Refolding was observed by injection of denatured protein into columns having isocratic concentrations in the transition and native base-line zones.
(17) The mutant ribosomes prepared from the transition-phase cells have much lower activity (below 60%) for poly(U)-directed polyphenylalanine synthesis than those in exponentially growing or resting stationary-phase cells.
(18) Aside from typical nuclear spheroids, irregularly shaped nuclei were frequently seen, associated with increased nuclear folds, transitional stages between nuclear folds and nuclear spheroids were also present.
(19) The surface film transition is especially noted in the pressure-area curve of the surfactant and approximates in two dimensions the broad thermotropic phase transition of the bulk phase surfactant.
(20) Stool weights, defecation frequencies, and transit times in this group are much closer to those of westernized whites than to rural blacks.