(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.
Rhomboid
Definition:
(n.) An oblique-angled parallelogram like a rhomb, but having only the opposite sides equal, the length and with being different.
(a.) Same as Rhomboidal.
Example Sentences:
(1) Direct projections from the nucleus reuniens (Re) and the rhomboid nucleus (Rh) in the midline of the thalamus were examined in the rat by utilizing anterograde axonal transport of Phaseolus vulgaris leukoagglutinin (PHA-L).
(2) A case of median rhomboid glossitis associated with amyloid deposition was presented.
(3) Thus, we have recognized a central core in the anterodorsal area; oval, juxtacapsular, and rhomboid nuclei in the anterolateral area; and fusiform, dorsomedial, dorsolateral, magnocellular, and ventral nuclei in the anteroventral area.
(4) While the arteries show a long stretched spinle or lancet like form they change over blunt, oval, triangular or rhomboid forms into polygonal cells with spiked border lines at the venules.
(5) Two modifications to the classic design of the rhomboid flap are described.
(6) Within the thalamus, only galanin-immunoreactive fibers were seen within the midline paraventricular, reuniens, and rhomboid nuclei.
(7) The transfer of the levator scapulae associated, or not, with the rhomboid minor allows regression of functional signs and a return to normal function of the shoulder.
(8) No pathways were demonstrated from the medial line nuclei (paraventricular, interanteromedial, rhomboid, central medial and reunial), from intralaminar nuclei (central lateral, paracentral and parafascicular) and from the lateral part of the thalamic medio-dorsal nucleus to the amygdala.
(9) Qualitative observations showed that the general configuration of the trabecular meshwork changed gradually with age, from a long wedge shape to a shorter, more rhomboidal form.
(10) To investigate the possible rôle of Candida in median rhomboid glossitis, the presence of Candida was looked for both in the foramen cecum area and the lateral borders of 100 human cadaver tongues.
(11) Calretinin cells were most prominent in the midline (paraventricular, reuniens, rhomboid) and intralaminar (central medial, paracentral) nuclei and in a group of cells along the rostral central gray which appeared continuous with the caudal extent of the midline nuclei.
(12) A series of twenty-eight cases of median rhomboid glossitis were studied histologically.
(13) Among the most densely innervated nuclei are the parafascicular, paraventricular, rhomboid, central medial and parts of mediodorsal, lateral posterior, and ventral lateral geniculate.
(14) The Limberg (rhomboid) flap is a very reliable surgical method in which the donor site and the associated tension in tissue lie outside the weight-carrying areas; the donor site lies in the perineal area, which is never used for other flaps.
(15) Median rhomboid glossitis is an inflammatory lesion of the tongue, now believed to be secondary to candidiasis.
(16) A red-violet, rhomboid-shaped mark on the sacrum of 25 children is described.
(17) We have examined the role of rhomboid in eye development and find that, while mutant clones have only a subtle phenotype, ectopic expression of the gene causes the non-neuronal mystery cells to be transformed into photoreceptors.
(18) The densities are paired on the adjacent septal membranes, and most frequently are shown by optical diffraction to be arranged on the membrane surfaces in hexagonal or rhomboidal lattices with a centre-to-centre spacing of 34.8 nm.
(19) We document a case of median rhomboid glossitis with heavy colonisation by Actinomyces in a 60-year-old male.
(20) Small ovoid glomerular cells are morphologically and biochemically intermediate between circular glomerular cells and rhomboid glomerular cells, and may represent an in vitro modification of either circular glomerular cells or rhomboid glomerular cells.