(n.) A solid, all plane sections of which are ellipses or circles. See Conoid, n., 2 (a).
(a.) Alt. of Ellipsoidal
Example Sentences:
(1) The lesion (10.6 X 9.8 mm) was a well-defined ellipsoid granuloma due to a foreign body with a central zone of necrosis surrounded entirely by a fibrous wall.
(2) The algorithm is an improvement over the sphere model in that it considers two distinct surfaces: an ellipsoid, to model the region of the skull on which the sensors are placed, and a sphere as the medium in which the current dipole model is considered.
(3) Oocysts appeared under bright field microscopy as 3x4 mcm ellipsoidal bodies with a central large round granule, known as the residuum, and 1-4 granules.
(4) 1965.-Thin sections of filterable hemolytic anemia agent of rat, now identified as Haemobartonella muris, revealed (i) that the agent is spherical or ellipsoidal and 350 to 700 mmu in size, (ii) that it has a single limiting membrane enclosing granules and some filaments (neither cell wall nor nucleoid was found), and (iii) that it is found preferentially at the surface and sometimes within the cytoplasmic vacuoles of erythrocytes in the circulating blood and bone marrow, and multiplies there through binary fission.
(5) The ReLPS suspension showed large ellipsoidal particles 12-38 nm wide and 40-100 nm long.
(6) Light microscopic studies indicate it has an ellipsoidal centre from which catalase-positive filamentous or rod-like processes protrude along its major axis; hence, it is called a phi body.
(7) E2 was obtained as follows: The stress-time integral was analyzed from pressure-volume data and wall thickness using an ellipsoidal calculation model.
(8) The thermographs showed a pattern of ellipsoidal isotherms (major axis horizontal) approximately concentric about a temperature apex (coldest point) which was slightly inferior to the geometric center of the cornea (GCC).
(9) These data are consistent with an ellipsoidal rather than a spherical shape.
(10) There is saturation of the interaction sites by the aggregation of a few protein monomer units possibly to form a tetramer which is moderately asymmetric (1:4 axial ratio, assuming an ellipsoid of revolution) and relatively rigid.
(11) The uterine volume was measured in 30 patients 24 hours before hysterectomy by ultrasonography using the prolate ellipsoid formula.
(12) The lunar particles found in the sample include: (i) spherules, rotational ellipsoids, dumbbells, tear-drops, rings, and crescents which have (ii) diameters of 0.1 to 500 microns; (iii) budlike features on the particles; and (iv) chemical inhomogeneity (electron probe).
(13) Oocytes of I. serini are spheroid and average 19.2 times 20.1 mum, while those of I. canaria are larger, more ellipsoid, and average 21.8 times 24.6 mum.
(14) Also, in bursectomized birds, the ellipsoid could not be identified, although a small number of abnormal ellipsoid-associated cells (EAC) were observed in the periellipsoid region.
(15) Native human Glu-plasminogen (Glu1-Asn791) was previously shown to have a radius of gyration of 39 A and a shape best described by a prolate ellipsoid [Mangel, W. F., Lin, B., & Ramakrishnan, V. (1990) Science 248, 69-73].
(16) From the relaxation times and the orientation mechanisms, the nucleosome may be assimilated to an oblate ellipsoid of dimensions about 140 x 140 x 70 A, and the DNA superhelical axis is parallel to its shorter axis.
(17) Uterine volume, based on the ultrasound data, was calculated, utilizing the formula for a prolate ellipsoid, before and after treatment.
(18) The chamber, an ellipsoid of revolution, is gold-plated for increased reflectivity.
(19) The protective aspect of melanin in dark skin is seen as resulting from its high concentration and its confinement to ellipsoidal and densely packed organelles that can effectively shield the nucleus.
(20) Second, although the parallelogram model provides a slightly better fit of our data than the other two shapes, it does not serve as a better guide than the ellipsoidal model for interpolating from the measurements to thresholds in novel color directions.
Spheroid
Definition:
(n.) A body or figure approaching to a sphere, but not perfectly spherical; esp., a solid generated by the revolution of an ellipse about one of its axes.
Example Sentences:
(1) Microelectrodes were used to measure the oxygen tension (PO2) profile within individual spheroids at different stages of growth.
(2) 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.
(3) The nuclei in these typical onocytes appeared oval or spheroid.
(4) The tumor cells of these melanomas are characterized by spheroidal melanosomes and containing pheomelanins.
(5) This is a clinical, histopathological and electron microscopical study on the spheroidal degeneration of the cornea by means of 48 histologically verified cases.
(6) Our results show the feasibility of back-extrapolating multicellular tumour spheroid growth curves to obtain survival estimates that can be applied to establish sublethal damage repair capacity.
(7) HCG, E2 and P4 were secreted into the culture medium throughout the entire culture period, in proportion to spheroid size.
(8) In addition, it was observed that the higher resistance of the V79 spheroid cells than the monolayers to gamma-irradiation is not diminished in the pion peak, suggesting that the underlying phenomenon of intercellular communication influences cell survival even after high-LET irradiation.
(9) Under the 3-dimensional geometry of the spheroid system, there was, however, generally a more extensive ECM.
(10) The spheroids grew exponentially with a volume-doubling time of approximately 24 h up to a diameter of approximately 580 microns and then the growth rate tapered off, more for spheroids grown at the low than at the high oxygen tension.
(11) The cytotoxicity of doxorubicin (DX), 4'-O-methyl-DX (MET-DX), 4'-deoxy DX (DEO-DX), 4'-deoxy-4'-iodo-DX (IODO-DX), daunorubicin (DNR)and 4-demethoxy-DNR (DM-DNR) on LoVo cells cultured as a monolayer (in exponential and stationary phases of growth) and as spheroids, are evaluated following 1-h exposure to the drugs.
(12) Under conditions of severe hypoxia (< 0.01% O2), 2 h of pretreatment or 18 h of simultaneous treatment with SR 4233 did not significantly enhance the effectiveness of 131I-NR-LU-10 in spheroids.
(13) The reported prevalence and severity of primary spheroidal degeneration in Labrador and nothern Newfoundland is based on a survey of 929 patients.
(14) Apparently the latter represented conglomerates of adherent spheroid elements that resembled somewhat "large bodies" of L-forms.
(15) The results of immunotitration and immunodiffusion experiments and of the sodium dodecyl sulfate-polyacrylamide gel electrophoretic analysis of immunoprecipitates revealed: (i) a high degree of immunochemical identity of this enzyme only within the family Enterobacteriaceae; (ii) intermediate-to-weak cross-reaction with the phenylalanyl-tRNA ligases from Pseudomonadaceae, Rhodopseudomonas spheroides, and Bacillus stearothermophilus; (iii) no detectable cross-reaction (with the methods employed) with the enzymes from several gram-positive organisms, Euglena gracilis, and several fungi.
(16) Histological alterations included nerve fibre swelling and degeneration, occasional spheroids, astrocytic gliosis, increased macrophage activity and increased perivascular collagen.
(17) The photosynthetically-incompetent mutant V-2 of Rhodopseudomonas spheroides which is incapable of synthesising bacteriochlorophyll was grown aerobically under conditions of both high and low aeration.
(18) Transplanted spheroids continued to express the growth inhibitory activity.
(19) The outer-layer cells of spheroids and fed plateau monolayers peaked at a similar density; the majority of middle-layer cells banded close to unfed plateau and exponential hypoxic monolayers, while most inner-layer cells banded where fed or unfed plateau hypoxic monolayer peaked in density.
(20) Survival of spheroid and monolayer cells after hypertonic NaCl treatment was identical.