(n.) A common name of the yellowish green mineral chrysolite, esp. the variety found in eruptive rocks.
Example Sentences:
(1) The study demonstrates that the partial substitution of olivine can reduce the concentration of free silica to acceptable health levels.
(2) Olivine inhalation also suppressed splenic PFCs and alveolar macrophage phagocytosis, but to a lesser degree than silica.
(3) Two factories were singled out for specific attention: one where asbestos was used in calcium silicate brick production and one where olivine, used as a raw material, may have been contaminated with natural mineral fibers and where the production process would have exposed workers to coal-tar pitch volatiles.
(4) Olivine is a magnesium iron silicate (Mg, Fe) SiO4 which occurs in nature and contains little or no free silica.
(5) A method for cryogenically grinding and separating (by size) fibrogenic minerals in the 1-micron size range is described and verified for chrysotile asbestos, quartz, forsterite (an olivine), and tantalum with a battery of analytical tests.
(6) The foundry was surveyed once before the substitution of olivine and three times after the changeover.
(7) A comparative study was done in mice on the effects of silica and olivine inhalation.
(8) In animals tested after 570 days of dust exposure, it was determined that the ability to lyse allogeneic tumor cells in vitro was impaired by olivine slightly more than by silica, while antibody-dependent cell-mediated cytotoxic and mitogenic responses by splenic lymphocytes were unchanged by inhalation of either dust.
(9) Field tests were carried out to compare the air quailty in a gray iron foundry before and after changing the molding material from the standard silica based sand to the mineral olivine.
(10) Previous studies have shown that silica exposures in the cleaning of castings can be reduced or eliminated through the use of mold coatings, which minimize sand burn-in on the casting surface; by application of high-velocity, low-volume exhaust hoods; and by the use of a nonsilica molding aggregate such as olivine.
(11) They are the radium-bearing Peitou stones, an unusual occurrence of uraniferous zone at Sanhsia, and uranium precipitation in the glassy olivine basalt in a tea field at Tachi.
(12) A laboratory study of the interaction of H2O frost with samples of the minerals olivine (Mg,Fe)2SiO4 and pyroxene (Mg,Fe)SiO3 at -11 degrees C to -22 degrees C revealed that an acidic oxidant was produced.
Orthorhombic
Definition:
(a.) Noting the system of crystallization which has three unequal axes at right angles to each other; trimetric. See Crystallization.
Example Sentences:
(1) Based on the refined atomic coordinates of the tRNAphe in the orthorhombic crystal, on the recent advances in the distance dependence of the ring-current magnetic field effects and on the adopted values for the isolated hydrogen-bonded NH resonances, a computed spectrum consisting of 23 protons was constructed.
(2) 261, 16207-16209) that recombinant murine interferon-beta produced in Escherichia coli was crystallized in an orthorhombic space group C222(1) using polyethyleneglycol 8000 as precipitant, the crystals had an insufficient resolution and a marked tendency for orientational disorder around the c axis.
(3) The mutant proteins were screened for their ability to crystallize into the orthorhombic form and bind mercury ions isomorphously.
(4) In the orthorhombic crystal lattice, tRNA(Asp) molecules are associated by anticodon-anticodon interactions through a two-fold symmetry axis.
(5) The melamine forms disordered crystals of orthorhombic symmetry with a = 11.957(3), b = 17.267(3), c = 5.769(3)A.
(6) The crystals have a rhombic prismatic habit and belong to the orthorhombic space group C222(1) with unit cell dimensions a = 130 A, b = 213 A and c = 216 A. X-ray structure determination is underway.
(7) The subcell (HS1) is orthorhombic with as = 10.3, bs = 7.5 and cs = 2.54 A.
(8) N-Z-L-Pro-D-Ala-OMe, C17H22N2O5, Mr = 334.38, crystallizes in the orthorhombic space group P2(1)2(1)2(1), with the cell dimensions a = 5.005 (5), b = 17.690 (9) and c = 18.70 (1) A3, V = 1656.3 A3, Z = 4, Dx = 1.341 g cm-3, Cu K alpha, lambda = 1.54184 A, mu = 7.830 cm-1, F(000) = 712, T = 198 K, final R (on F) = 0.036 for 1575 observed reflections with I greater than or equal to 3 sigma(I).
(9) The crystals are orthorhombic, space group P212121, with a=8.611(2), B=6.138(2), And c=14.912(4) A. Least-squares refinements yielded a conventional R-factor of 0.036.
(10) The atomic coordinates of yeast phenylalanine transfer RNA (tRNA) as well as the torsion angles of the polynucleotide chain are presented as derived from an x-ray diffraction analysis of orthorhombic crystals.
(11) These crystals diffract to 3.4 A and the observed diffraction is consistent with orthorhombic space groups P4(1) and P4(3).
(12) Yeast phenylalanyl transfer RNA crystallizes in a simple orthorhombic unit cell (a = 33.2, b = 56.1, c = 161 A), and the crystal yields an x-ray diffraction pattern with a resolution of 2.3 A.
(13) Concanavalin A, a phytohemagglutinin isolated from the jack bean, crystallizes at pH 6.8 in the orthorhombic space group 1222 with a = 89.9, b = 87.2, and c = 63.1 A.
(14) C20H24O4, Mr = 328.41, orthorhombic, P2(1)2(1)2(1), a = 11.688 (3), b = 15.377 (5), c = 9.466 (2) A, V = 1701 (1) A3, Z = 4, Dx = 1.282 g cm-3, lambda (Mo K alpha) = 0.71073 A, mu = 0.823 cm-1, F(000) = 704, T = 298 K, R = 0.063 for 1921 reflections with F greater than 2 sigma (F).
(15) Above this temperature, this "orthorhombic" phase converts directly to the liquid-crystalline phase.
(16) The crystals exhibit strong F222 pseudo symmetry but belong to the orthorhombic space group C222 or C222(1), with cell parameters a = 73.8 A, b = 119.9 A and c = 133.2 A with two molecules per asymmetric unit.
(17) The crystal form is of the orthorhombic space group P2(1)2(1)2, with unit cell dimensions a = 150 A and b = 129 A.
(18) Crystals of methyl 3-O-beta-D-glucopyranosyl-beta-D-glucopyranoside (methyl beta-D-laminarabioside) belong to the orthorhombic system, space group P2(1)2(1)2, with a = 14.548(2), b = 24.252(7), c = 4.938(1) A, and Z = 4.
(19) The receptor fragment crystallizes in the orthorhombic space group P2(1)2(1)2(1), a = 105.5 A, b = 224.5 A, c = 363.5 A.
(20) 1-(2,6-Dihydroxy-4-methoxyphenyl)-3-(4-methoxyphenyl)-2-propen-1-o ne, C17H16O5, Mr = 300.31, orthorhombic, Pbca, a = 27.903 (3), b = 13.958 (2), c = 7.662 (1) A, V = 2984 (1) A3, Z = 8, D chi = 1.337 Mg m-3, lambda(Cu K alpha) = 1.5418 A, mu = 0.729 mm-1, F(000) = 1264, T = 295 K, R = 0.040 for 1702 observed reflections.