(n.) The standard unit in the measure of electrical resistance, being the resistance of a circuit in which a potential difference of one volt produces a current of one ampere. As defined by the International Electrical Congress in 1893, and by United States Statute, it is a resistance substantially equal to 109 units of resistance of the C.G.S. system of electro-magnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice 14.4521 grams in mass, of a constant cross-sectional area, and of the length of 106.3 centimeters. As thus defined it is called the international ohm.
Example Sentences:
(1) The median impedance ranged from 1500 to 3250 ohms.
(2) In the other subject MAP decreased after 25 min from 75 to 50 mmHg (10.0 to 6.7 kPa) and HR from 82 to 60 beats.min-1 while thoracic impedance increased from 28.8 to 29.6 ohm.
(3) Specific membrane resistance was calculated as either 13,000 or 800 ohm-cm2 depending on whether input resistance was attributed to the total cell surface membrane area or to the outer surface of the sphere alone.
(4) An inductively coupled, quadruple-tuned surface coil with a 50-ohm match at all relevant frequencies was used for both excitation and receiving.
(5) At 10(-6)M amphotericin B, the DC membrane resistance fell from approximately 10(8) to approximately 10(2) ohm-cm(2), and the membranes became Cl(-)-, rather than Na(+)-selective; the permeability coefficients for hydrophilic nonelectrolytes increased in inverse relationship to solute size, and the rate of water flow during osmosis increased 30-fold.
(6) Transepithelial potential difference and resistance were 8.9 mV, retinal side positive, and 339 ohm-cm2, respectively, in chronic retinal detachments.
(7) The adrenocorticolytic agent DMBA and its liver metabolite, 7-OHM-12-MBA, were investigated with respect to their mechanism of toxicity in cultured rat adrenal cells.
(8) The strain I MDCK cells used have a transmonolayer resistance greater than 2,000 ohm .
(9) Retinal pigment epithelium (RPE)-choroid-sclera preparations from black dutch-belted rabbits were sealed in an Ussing chamber maintained at 37-39 degrees C. Typical preparations produced a spontaneous voltage (Ve) of 12.5 mV (retina side positive) and possessed an electrical resistance (R) of 350 ohm-cm2.
(10) There is only a few hundred ohms resistance between an antimony pH electrode and the reference electrode so that the voltage generated can be recorded with simple low-impedance recorders linked to microcomputers.
(11) Conductances greater than 10(-4) reciprocal ohm per square centimeter can eventually be attained without any loss of membrane stability.
(12) The advantage of this technique for analysis of synaptic inputs in comparison to the standard measurements of synaptic potentials is apparent from Ohm's law.
(13) Optically black, thin lipid membranes prepared from sheep erythrocyte lipids have a high dc resistance (R(m) congruent with 10(8) ohm-cm(2)) when the bathing solutions contain NaCl or KCl.
(14) Giga-ohm seal whole cell recording technique was used to examine ionic currents changes induced by dimethylsulfoxide (DMSO) in neuroblastoma X glioma hybrid NG 108-15 cells.
(15) The impedance of the amebic cell suspension, expressed as resistivity (in ohm-cm), was significantly greater than the test solution and increased with decreasing temperature or greater cell packing (P less than 0.01), indicating that the resistivity measurements reflected the impedance of the amebic surface membrane.
(16) For the secreting stomach, the resistance between the interstitial fluid of the pit region and the fluid on the mucosal surface was 55 ohm cm(2), determined as the change in PD per unit of applied current across stomach.
(17) A case of acute pulmonary oedema developing at 4300 metres showed an impedance value of 24-1 ohms on admission.
(18) However, the mean resistance of vaginal mucus was 44 ohms for both cycling and cystic cows.
(19) When back diffusion of H+ was induced by the passage of an electrical current of 510 mua per cm2 from the secretory (S) side of pH 2.25 to the nutrient side (N) for 30 min, the spontaneously secreting mucosae showed small decreases in PD (23.6 leads to 16.2 mv) and Isc (80 leads to 61 mua per cm2) but no significant change in R. In the burimamide-inhibited mucosae there were marked and significantly greater decreases of PD (26.8 leads to 3.4 mv), R (473 leads to 170 ohms cm2) and Isc (50 leads to 13 mua per cm2).
(20) Mean platelet aggregation was significantly lower in smokers than non-smokers (23.2 ohms vs 31.5 ohms, p less than 0.005).
Osm
Definition:
Example Sentences:
(1) These preliminary experiments suggest that oSm is similar to IGF-I in its binding characteristics and that primary cultures of skeletal muscle satellite cells possess type I and type II IGF receptors.
(2) IL-6, oncostatin M (OSM) and G-CSF also induce differentiation of M1 cells.
(3) Eggs also hatched readily in 1- to 50-m OsM solutions of urea, sucrose, sodium chloride, and glycerol, but hatching was inhibited at higher concentrations unless the eggs were left in solutions for long periods of time.
(4) We have detected significant similarities in the primary amino acid sequences and predicted secondary structures of OSM, leukemia-inhibitory factor (LIF), granulocyte colony-stimulating factor (G-CSF), and interleukin 6 (IL-6).
(5) Prognostically unfavorable MM and OSM values were found, predicting the possible lethal outcome.
(6) The antibody bound to ovine and bovine submaxillary mucins (OSM and BSM).
(7) We demonstrate that, like LIF, IL-6 and G-CSF, OSM can induce the differentiation of the myeloblastic M1 murine leukemia cells into macrophage-like cells.
(8) In the few hypercalcemic dogs in whom GFR was very low, I believe that injury to, and blockage of medullary tubules could account for most of the reduction in maximum U(Osm).
(9) Carboxymethylated OSM when deglycosylated by this method gives an apomucin with an apparent molecular weight of ca.
(10) The authors compare the efficacies of methods for assessing osmolality (OSM) and analysis of medium molecules (MM) in the prediction of the post-stroke period course in the first 7 days from the stroke onset.
(11) The experimental animals' body weight was significantly lower than that of controls with the same food consumption and their water intake and urine flow were much higher, especially after M. Sodium (and to a lesser extent potassium) excretion was raised at the outset of administration of both the test substances and again after the 5th to 8th dose, but only after M. After three weeks' administration of M. SNa, SK and S(osm) values were within normal limits.
(12) During hypertonic saline infusion plasma AVP levels correlated with P osM (R = .87, P less than .01, n = 8), suggesting some residual osmotic regulation of AVP release.
(13) The respective reflectance photoelectric outputs were used to make an internal calibration curve of the instrument relative to the arterial oxygen saturation values measured with a Co-Oximeter (OSM-3) in five healthy nonsmoking subjects during steady-state hypoxaemia.
(14) A significant change in p-osm caused a significant change in pAVP and vice versa.
(15) The linear viscoelastic and rheological properties of high molecular weight ovine submaxillary mucin (OSM) solution have been investigated in terms of the Newtonian steady-flow viscosity [eta(gamma)], the complex oscillatory viscosity [eta*(omega)], and the storage and loss shear moduli [G'(omega) and G"(omega)].
(16) Operant drinking and lysine vasopressin (LVP) release were investigated in minipigs following intracerebroventricular (ICV) injections of hypertonic equiosmolar (1.4 osM) solutions of NaCl and of sucrose and mannitol dissolved in 0.15 M NaCl or water, and of urea dissolved in 0.15 M NaCl.
(17) The correlation between delta-OsM and serum EtOH was 0.968 in 151 patients in whom EtOH was detected.
(18) MLS 128 bound to mucin glycopeptides from LS 180 cells and their asialo forms to the same extent as well as to ovine submaxillary mucin (OSM) and asialo OSM.
(19) Respiratory compensation of the pH change further increases Osm.
(20) The OSM 3 Hemoximeter gives much more accurate determinations of HbCO than the IL 282 Co-Oximeter in the presence of SHb.