(n.) The loadstone; a species of iron ore (the ferrosoferric or magnetic ore, Fe3O4) which has the property of attracting iron and some of its ores, and, when freely suspended, of pointing to the poles; -- called also natural magnet.
(n.) A bar or mass of steel or iron to which the peculiar properties of the loadstone have been imparted; -- called, in distinction from the loadstone, an artificial magnet.
Example Sentences:
(1) By presenting the case history of a man who successively developed facial and trigeminal neural dysfunction after Mohs chemosurgery of a PCSCC, this paper documents histologically the occurrence of such neural invasion, and illustrates the utility of gadolinium-enhanced magnetic resonance scanning in patient management.
(2) The tumors were identified by magnetic resonance (MR) imaging.
(3) Twenty patients with non-small cell bronchogenic carcinoma were prospectively studied for intrathoracic lymphadenopathy using computed tomography (CT) and magnetic resonance imaging (MRI).
(4) The role of magnetic resonance imaging is also discussed, as is the pathophysiology, management, and prognosis in the elderly patient.
(5) An innovative magnetic resonance imaging technique was applied to the measurement of blood flow in the abdominal aorta.
(6) Sequelae of chemo- and radiotherapy were only depicted by magnetic resonance imaging.
(7) Magnetic polyethyleneimine (PEI) microcapsules have been developed for trapping electrophilic intermediates in the gastrointestinal (GI) tract.
(8) Our data support the hypothesis that evoked and epileptiform magnetic fields result from intradendritic currents oriented perpendicular to the cortical surface.
(9) We conclude that exposure for 20 min to a 1.5-T static magnetic field does not alter body and skin temperatures in man.
(10) Magnetic resonance imaging of the spinal cord clearly demonstrated the entire lesion.
(11) Right ventricular volumes were determined in 12 patients with different levels of right and left ventricular function by magnetic resonance imaging (MRI) using an ECG gated multisection technique in planes perpendicular to the diastolic position of the interventricular septum.
(12) In April 1986, magnetic resonance imaging (MRI) of the thorax and shoulder girdle was presented to the 99th Annual Meeting of the American Association of Anatomists.
(13) In addition, a 31P nuclear magnetic resonance (NMR) technique was applied to investigate the in vivo energy metabolism of the graft.
(14) Line broadening detected in several of the high-field nuclear magnetic resonance spectra was attributed to cis-trans isomerization.
(15) The correlation of posterior intervertebral (facet) joint tropism (asymmetry), degenerative facet disease, and intervertebral disc disease was reviewed in a retrospective study of magnetic resonance images of the lumbar spine from 100 patients with complaints of low back pain and sciatica.
(16) In this critical review of human in vivo nuclear magnetic resonance (NMR) spectroscopy, the questions of which chemical species can be detected and with what sensitivity, their biochemical significance, and their potential clinical value are addressed.
(17) The location of the internal trans and cis isoprene units in ficaprenol-11 isolated from Ficus elastica was determined by 13C nuclear magnetic resonance.
(18) Using sterile conditions, antibodies to G were incubated with a suspension of transformed cells at 4 degrees C, unbound antibodies were then removed, and the cells were incubated with the immunoabsorbent (3 micron magnetic beads; J. Ugelstad et al.
(19) The EMD was miniaturized by using rare earth magnets in the construction of both external transmitter and internal receiver.
(20) We present three patients in whom the diagnosis of intranasal meningoencephalocele was made by magnetic resonance imaging.
Solenoid
Definition:
(n.) An electrodynamic spiral having the conjuctive wire turned back along its axis, so as to neutralize that component of the effect of the current which is due to the length of the spiral, and reduce the whole effect to that of a series of equal and parallel circular currents. When traversed by a current the solenoid exhibits polarity and attraction or repulsion, like a magnet.
Example Sentences:
(1) The suggested model is in good agreement with available experimental data and overcomes a number of difficulties which arise for the solenoid model and other models of the 30-nm chromatin fibril.
(2) The NMR probe consists of an eight-turn solenoid coil (2.3 mm i.d.
(3) They were trained to respond on a tongue-operated solenoid-driven drinking device that delivered 0.005 ml of a glucose and saccharin solution (G + S) per lick.
(4) The human chromatid would thus be composed by a hierarchy of helices with contraction ratios for DNA at each level of coiling of 7 (string of nucleosomes), 5 (solenoid) and 40 (4,000 A "unit fiber" or "super-solenoid") which results in an overall contraction ratio for DNA in the "unit fiber" structures of about 1,400, which is approximately 5-fold less than the final contraction of DNA in intact chromatids of condensed metaphase chromosomes.
(5) Double occlusions were also accomplished by simultaneously activating the solenoid valve and clamping the venous outflow of the lung lobe.
(6) The dogs were paralyzed but breathed 'spontaneously' by means of a solenoid valve opened and closed by the phrenic neurogram.
(7) SNR measurements of the coil pairs showed a marked improvement (up to 60%) over that of the reference solenoid.
(8) Piano tones with varying hammer velocities were produced by a computer-monitored acoustic piano containing optical sensors and solenoids, and the sounded tones were recorded and digitized for analysis.
(9) Rapid changes in carbon dioxide concentration were created by an electronically operated solenoid valve switching between 6.94% CO2 in 50% O2 balance N2 and 100% O2.
(10) Fresh gas is mixed in the correct proportions using two pulsed solenoid valves and a proportion of this passes through a third pulsed solenoid valve and is bubbled through liquid halothane.
(11) I propose how these two features are correlated and how they fit into the solenoidal model for the 300-A-diameter fiber of chromatin.
(12) The rats were also trained to obtain water from tongue-operated solenoid-driven drinking spouts.
(13) The predicted stable radius of curvature of charge-neutralized DNA is also equal to the radial dimension of a maximally contracted polynucleosome supercoil as measured by neutron scattering (17 nm), but further experimental investigation of the geometrical disposition of the spacer DNA regions in the solenoid will be necessary to rule out the possibility of accidental agreement for this complex system.
(14) The clinical picture is that of an organism placed at right angles to flux lines in the midst of a solenoid immersed in water exposed then to exogenously applied resonant physiologic magnetic fields which convert malalligned atomic lattices of oncogenes and associated particles to homologous normal structures.
(15) With increasing ionic strength, chromatin folds up progressively from a filament of nucleosomes at approximately 1 mM monovalent salt through some intermediate higher-order helical structures (Thoma, F., and T. Koller, 1977, Cell 12:101-107) with a fairly constant pitch but increasing numbers of nucleosomes per turn, until finally at 60 mM (or else in approximately 0.3 mM Mg++) a thick fiber of 250 A diameter is formed, corresponding to a structurally well-organized but not perfectly regular superhelix or solenoid of pitch approximately 110 A as described by Finch and Klug (1976, Proc.
(16) The Sechrist 990 HFV respirator, a solenoid-driven, pulse-generated high frequency jet ventilator, was used.
(17) The data do not support the solenoid, twisted-ribbon, or supranucleosomal particle models.
(18) Neurons in both regions contained cells with conditioned responses to the noise produced by the solenoid that delivered milk.
(19) We discuss the compatibility of our results with the various classes of models that have been proposed for the 30-nm fiber, including the continuous solenoid model and models built from the basic unit of the zig-zag ribbon.
(20) The prelabeled nerve terminals are retained on small glass fiber filters in a superfusion chamber accessed by three high speed, solenoid-driven valves.