What's the difference between rhombic and trirhomboidal?
Rhombic
Definition:
(a.) Shaped like a rhomb.
(a.) Same as Orthorhombic.
Example Sentences:
(1) 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.
(2) Most of the cerebellar plate has differentiated an intermediate layer, and the future rhombic lip is discernible.
(3) Treatment of oxidized enzyme with CO causes the g-tensor of the paramagnetic center to change from rhombic to axial symmetry.
(4) The large difference in their midpoint potentials (0 and -400 mV, respectively, in the soluble enzyme) permits the acquisition of individual electron paramagnetic resonance spectra characterized by nearly identical rhombic g tensors (gz = 2.025, gy = 1.93, gx = 1.905).
(5) Upon addition of substrates [such as cholesterol, 22(S)-hydroxycholesterol, 22(R)-hydroxycholesterol, 25-hydroxycholesterol, and 22-ketocholesterol], the EPR spectra exhibited many variations having rhombic symmetry in the major component and an additional minor component with less rhombic symmetry.
(6) The EPR spectra show non-zero rhombicity, the origin of which is discussed in terms of contributions from the usual zero-field effects of iron and from iron-radical spin-dipolar interaction.
(7) Center N-1a exhibits an EPR spectrum of nearly axial symmetry with g parellel = 2.03, g = 1.94, while that of Center N-1b shows more apparent rhombic symmetry with gz = 2.03, gy = 1.94 and gx = 1.91.
(8) At -120 to -100 degrees C, a rhombic signal appears, attributable to cytochrome d, followed at above -100 degrees C, by appearance of a second, axial signal near g = 6, here assigned to cytochrome(s) b, and changes in the redox state of iron-sulphur clusters.
(9) Decreasing the pH induces a shift from the rhombic towards the axial component of the signal.
(10) This result is based on the following assumptions: The crystals are rhombic dodecahedra with a greater than 4.2 nm and space group P213, thus much resembling cubic porcine glucagon; they are teleost glucagon and contain the whole glucagon content of the granule.
(11) The effect of inositol hexakisphosphate on the EPR properties of the nitric oxide derivative of ferrous dromedary (Camelus dromedarius) hemoglobin has been investigated at 110 K. In the absence of inositol hexakisphosphate, the nitrosyl derivative of dromedary hemoglobin shows an EPR spectrum with a rhombic shape and a weak hyperfine splitting in the gz region, a feature that is generally taken as characteristic of the high-affinity state of tetrameric hemoproteins.
(12) The 35 GHz spectrum of the cytochrome c reducible component shows a rhombic splitting and can be well simulated with g-values 2.18, 2.03 and 1.99.
(13) In addition, among various steroid complexes of ferrous-NO species having rhombic symmetry, the EPR spectra of 20(R),22(R)-dihydroxycholesterol complexes were significantly different from those of 22(R)-hydroxycholesterol complexes, suggesting that upon 20S-hydroxylation of 22(R)-hydroxycholesterol the conformation of the active site changes so as to facilitate subsequent cleavage of the C20-C22 bond of the cholesterol side chain.
(14) Extensive EPR studies on high-potential, iron-sulfur protein from Chromatium vinosum indicate that the singular spectrum of this four-iron, non-heme protein consists of a superposition of three distinct signals; namely, two principal signals of equal weight, one reflecting axial and the other rhombic symmetry, and a third nearly isotropic minority component.
(15) To determine the axial ligands to the low-spin heme and the heme rhombicity, the cytochrome was analyzed using low-temperature electron paramagnetic resonance (EPR) and magnetic circular dichroism (MCD) spectroscopy.
(16) The rhombic g-tensor of the EPR signal in both cases resembles that of (semi-met)RHr, the form obtained by one-electron reduction of metHr.
(17) The one-dimensional 1H NMR spectrum of the OM cytochrome b5 indicates that the rhombic perturbation of the ferric center is essentially identical to that in the microsomal beef, rabbit, chicken, and rat cytochromes b5.
(18) The K15Q iron protein and the normal iron protein had a similar total iron content and both proteins showed the characteristic rhombic EPR signal resulting from the reduced state of the single 4Fe-4S cluster bridging the two subunits.
(19) The experimental results are well explained solely by rhombic perturbation.
(20) The resulting Fe3+ possesses an EPR signal at g = 4.37 arising from conversion to a rhombic symmetry ligand field.