(n.) An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given directly is that of the image of the object formed at the focus of the object glass.
Example Sentences:
(1) ATP and deoxy-ATP, but not CTP, GTP, ITP, UTP, ADP, or cyclic AMP, promote Ca uptake; the KATP, is approximately 10 micrometer.
(2) At 5 micrometer and 2.5 mM sulphanilic acid under aerobic conditions, the regression lines for the permeation from lumen to blood pass almost through the origin, while the regression lines for the permeation from blood to lumen intersect the ordinate at a positive Y-value.
(3) The average length of the sarcomere in 5,34 micrometer for the non contracted muscle and 2,09 micrometer for the fully contracted muscle.
(4) Lipolysis stimulated by higher concentrations (0.3 and 3 micrometer) of NA was inhibited to a minor degree or not at all.
(5) The percentage inhibition of ATCase responds in a linear way to the logarithm of the concentration of PALA between 0.10 and 1.00 micrometer.
(6) To illustrate its potential for imaging ion currents through channels in membranes, a topographic image of a membrane filter with 0.80-micrometer pores and an image of the ion currents flowing through such pores are presented.
(7) Cortical lamination and parcellation of the anterogenual region in the human brain is studied in sections successively stained for nerve cells (15 micrometers), myelin sheaths (100 micrometers), and lipofuscin granules (800 micrometers).
(8) Under the same conditions the lowest thresholds for group Ib tendon organ afferents were about 40 micrometer.
(9) (d) It is shown that a high value of the cell-to-substrate gap may be accounted for by the presence of cell surface protrusions of a few micrometer length, in accordance with electron microscope observations performed on the same cell population.
(10) The bundle was confined to the medulla, and averaged 150-200 micrometer in width in the adult.
(11) This shows that there is an internal signal, but its range is short, only a few micrometers.
(12) In 17 pentobarbitalized dogs, the shunting of 15-micrometer and 9-micrometer microspheres was studied in the brain, myocardium, kidney, intestine, and lung.
(13) The plateau phase of Ca2+ was inhibited competitively by Mg2+ (0.5--50 mM) and non-competitively by Mn2+ (30 micrometer--1 mM), whereas the maximal contraction of Ca2+ was not inhibited by either ion.
(14) The intracellular distribution of ligandin and Z protein was studied by applying the peroxidase-antiperoxidase procedure of L. A. Sternberger (Immunocytochemistry, Prentice Hall Inc., 1974) to paraffin sections and free-floating 10-micrometers frozen sections that were processed for both light and electron microscopy.
(15) PVC particles in micrometer size range are very suitable as models to study persorbability in animals and the hematogenous dissemination of PVC particles.
(16) The mean thickness of epiphyseal plates form control rats was 430 micrometers (mum) which was reduced to 313 mum in hypoxic rats.
(17) These stones contained little cholesterol and exhibited a spongy microstructure characterized by small tubules with a diameter of 1 micrometer.
(18) Tracheobronchial deposition of inhaled particles in rabbit lung was studied after exposure to monodisperse aerosols 4--9 micrometer (aerodynamic diameter).
(19) Preliminary experiments have suggested that the swimmming speed of human sperm does not differ in flat capillary tubes of 200-micrometer and 400-micrometer depth.
(20) Type II neurons had multipolar or polygonal cell bodies, which measured an average 31 micrometer by 43 micrometer and emitted four to seven primary dendrites.
Vernier
Definition:
(n.) A short scale made to slide along the divisions of a graduated instrument, as the limb of a sextant, or the scale of a barometer, for indicating parts of divisions. It is so graduated that a certain convenient number of its divisions are just equal to a certain number, either one less or one more, of the divisions of the instrument, so that parts of a division are determined by observing what line on the vernier coincides with a line on the instrument.
Example Sentences:
(1) The first method consisted of using a vernier caliper by which direct measurements (Dv) of the distances were recorded.
(2) The tests are resistant to the effects of opacities because they utilize a localization task (vernier acuity) rather than a resolution task.
(3) We report that the ability to detect a small vernier offset (less than 5 sec of arc in many individuals) between two small spots of light separated by a narrow gap can be disrupted by presenting additional targets in close proximity to the vernier stimulus.
(4) This result implies that the human visual system processes vernier offsets in parallel.
(5) Vernier acuity and vernier bias were examined in persons aged 20 to 79 years using a method of adjustments.
(6) Previous experiments that have compared monocular vernier acuity in amblyopic, monocularly blind, and normal binocular subjects have been confined to the center of the retina.
(7) Sensitivity to sinusoidal curvature (periodic vernier acuity) was measured by the method of adjustment as a function of spatial frequency of the curvature.2.
(8) Almost all increases in thresholds with eccentricity were explained by the theory in five of these tasks, which included the two-dot vernier hyperacuity test, the measurement of visual acuities with gratings, the Snellen E test, and two acuity tests that required either separation between dots or discrimination between two mirror-symmetric forms.
(9) The previously reported contrast dependence of vernier acuity was confirmed, but contrast had a much smaller effect upon interval acuity.
(10) In the past 10 years much has been learned about the development of two hyperacuities, namely, vernier acuity and stereoacuity.
(11) The developmental function for vernier acuity is discussed in relation to physiologic development of the kitten visual system and is related to published data on the development of stereoacuity and spatial resolution in the same species.
(12) Although stereoacuity and vernier acuity both yield comparable thresholds well below the eye's resolution limit, the neural circuits for these two classes of visual responses do not process the signals in an identical manner.
(13) Near birth, grating acuity is relatively more mature than vernier acuity.
(14) All vernier results, both for better and amblyopic eye, were within one line of Snellen acuity.
(15) Neither the variation in retinal eccentricity nor changing the paradigm to a vernier acuity task altered the basic pattern of results.
(16) Subjects showed little improvement in OC vernier acuity, even after 50,000 trials.
(17) In a crossover comparison with standard Vernier-type calipers, the Tumorimeter was significantly more accurate than bidimensional caliper determinations (less than or equal to 5% surface area error vs a 21-28% overestimate error for calipers).
(18) Vernier thresholds for all spatial frequencies are related to contrast by a power law with exponents of approximately -0.8.
(19) The values obtained by image analysis and by measurement with vernier calliper are identical and similar to the data of the literature.
(20) Differences between OC and SC vernier acuities persisted over a wide range of interstimulus spacings, widths, and contrasts.