What's the difference between elliptical and spherical?

Elliptical


Definition:

  • (a.) Of or pertaining to an ellipse; having the form of an ellipse; oblong, with rounded ends.
  • (a.) Having a part omitted; as, an elliptical phrase.

Example Sentences:

  • (1) In this paper we present a robust algorithm to determine automatically contours with elliptical shapes.
  • (2) The results of the rapid-freeze and deep-etch procedure showed that the ridges observed by the surface replica method consisted of linear arrangements of elliptical particles on the ES face of the plasma membrane.
  • (3) The interaction with these lipids, the rotational conformations of the 17-acetyl group, and invertible conformations of the cyclohexenone of PROG were discussed on the basis of the elliptical strength of the Cotton effect and energy estimation of the preferred conformers.
  • (4) Similar aftereffects were obtained whether the area of the test stimulus was fixed or varied randomly from trial to trial, and whether the test stimulus was rectangular or elliptical.
  • (5) Raji consistently exhibited the highest and SU-AMB-1 the lowest polymerase activity and ellipticity.
  • (6) As univariate predictors, the variance of nuclear roundness, the mean of ellipticity, the Gleason score, age, and clinical stage were statistically significant predictors of disease progression when analyzed with Kaplan-Meier survival curves.
  • (7) The thermodynamics of this self-association have been evaluated by studying the temperature- and concentration-dependence of the mean residue ellipticity at 220 nm.
  • (8) In addition, it appears that the population of Elschnig type III nerve heads includes higher elliptical values than that for the Elschnig type II nerve heads.
  • (9) Protein unfolding was detected by ellipticity changes at 222 nm with increasing concentrations of guanidine hydrochloride (GdnHCl).
  • (10) Ontogenetic data on developmental stages I-IV of 3678 melanosomes based on geometric considerations (length, width, shape, and area) showed that MSH did not induce a complete transformation from spherical phaeomelanosomes to elliptical eumelanosomes.
  • (11) On 62 of 100 pediatric bladder sonograms a small, elliptical, hypoechoic structure was observed on the middle of the anterosuperior surface of the urinary bladder.
  • (12) The spatial extension of these megalospermatocyte populations is spherical to elliptical, some of them look like a section of a spiral around the longitudinal axis of the seminiferous tubule.
  • (13) In the case of the inclined model and a vertical beam the diffusion field was elliptical, with a still more diffuse transition to the fields above and below than in the case of the vertical model and a horizontal beam.
  • (14) CD measurements gave equal [theta] values for lysozyme and derivative at the two negative ellipticity bands at 208 and 220 nm.
  • (15) LH-RH nerve processes terminated mainly in the infurdibular radix within an elliptical zone surrounding the bases of the infundibular recessus.
  • (16) Similar, but far smaller, effects were seen in a region with an elliptical cross-section and when the flow was made pulsatile.
  • (17) The correlation showed the advantages of planning using optimal schemes in volumes with an elliptical and irregular section by the criteria of homogeneity of target contour irradiation, the lessening of radiation exposure beyond the target and an increase in the absolute value of minimum dose rate at the border of an irradiated volume.
  • (18) There was no positive ellipticity, and the spectrum was not characteristic of collagen.
  • (19) (b) Chemical input is received from unidentified presynaptic neurons containing either round or elliptical vesicles.
  • (20) The kinetics of regain of the native ellipticity in the far- and near-UV spectra have been investigated during the refolding at pH 7.8 and 20 degrees C of guanidine-unfolded, nonreduced hen egg white lysozyme.

Spherical


Definition:

  • (a.) Alt. of Spheric

Example Sentences:

  • (1) The authors have presented in two previous articles the graphic solutions resembling Tscherning ellipses, for spherical as well as for aspherical ophthalmic lenses free of astigmatism or power error.
  • (2) This lack of symmetry in shape and magnitude may be due to non-sphericity of the skull over the temporal region or to variations in conductivities of intervening tissues.
  • (3) As a consequence of deformation from spherical-to-cylindrical shape in the microvasculature, demands for increased surface membrane area leads to increases in surface membrane tension above critical levels for rupture, and the cancer cells are rapidly and lethally damaged.
  • (4) From the different shapes of the scattering curves of the native phosphofructokinase at pH 7.5 in the presence of 15 mM ATP and of the cross-linked tetramer or octamer, it can be inferred that the shapes of the protomers are different: in the presence of ATP the protomers are elongated, having an axial ratio of 1.8 to 2.0; the cross-linked state reveals a spherical protomer of radius 33.0 A, similar to that of the native enzyme at pH 7.5 in the presence of fructose 6-phosphate or fructose 1,6-bisphosphate.
  • (5) Equivalent viewing power (EVP), field of view, and working distance (WD) were calculated for 4 different magnifier equivalent powers, four magnifier-to-eye distances, and for uncorrected spherical ametropias varying from +20.00 to -20.00 D in 0.25 D steps.
  • (6) A sound source is commonly spherical, therefore solutions are found for the wave equation in spherical coordinates, giving a precise meaning to the 'azimuthal' and 'magnetic quantum number' analogy.
  • (7) One biliary stone showed cholesterol with spherical bodies of calcium carbonate and pigment.
  • (8) A simple method has been developed for fusing synaptic vesicles into spherical structures 20-50 micron in diameter.
  • (9) Anterior lenticonus is a rare condition, in which there is a conical or spherical protrusion of the anterior surface into the anterior chamber.
  • (10) These results suggest that the shapes of the two enzymes are more spherical in solution than the proposed structural model previously reported.
  • (11) Elementary spherical particles similar to those described in the mitochondria are found in isolated rat liver and spleen nuclear membranes.
  • (12) NF-L in 6 M-urea took the form of spherical particles with a diameter of about 12 nm.
  • (13) Later, melanocytes became spherical and had membrane bound, autophagosome-like compartments of pigment granules.
  • (14) Rotation time constants obtained from the dichroism decay are not consistent with a spherical shape, for either the holo- or core repressor.
  • (15) The mean spherical approximation (MSA) provides a simple and reliable method for computation of single ion activities.
  • (16) Neuron #1 contained large spherical electron-dense vesicles while neuron #2 contained smaller subspherical vesicles.
  • (17) The morphological unit of the regular array appeared to consist of four spherical subunits, each about 2 nm in diameter, which were arranged in a tetragonal pattern about 4.5 by 7.0 nm in dimension.
  • (18) These receptors were subdivided by their morphology in the next groups: pear-shaped receptors with capsule; capsuled spherical receptors located near vascular walls; ovoidal receptors with capsule and glomerular structure; simple or complex mace-shaped receptors without capsule.
  • (19) A simple closed-form solution is derived for a thin linearly elastic spherical model of the cornea.
  • (20) Levels of pregnenolone and progesterone in spherical pig blastocysts (near 4 and 15 microM respectively) exceeded respective levels in histotroph by about 400-fold.