(n.) The Greek letter /, /, or / (English S, or s). It originally had the form of the English C.
Example Sentences:
(1) The programs are written in Fortran and are implemented on a Rank Xerox Sigma 6 computer.
(2) The use of sigma 54 promoters, known to require cognate binding proteins, could allow the fine-tuning that provides the temporal ordering of flagellar gene transcription.
(3) It is concluded that the marked effects of certain sigma ligands on DA cell electrophysiology are likely due to their non-sigma properties.
(4) The common effects of sigma agonist compounds on LCGU included a moderate, global elevation of LCGU.
(5) To test the hypothesis that EAA agonists are involved in transmission of nociceptive information in the spinal cord, we tested the effect of various opioid, sigma and phencyclidine compounds on the action of NMDA in the tail-flick, hot-plate and biting and scratching nociceptive tests.
(6) The instrumental treatment of the volvulus of the sigma prevents surgical interventions under unfavourable conditions for the patient.
(7) All are satisfied by [Formula: see text], where N is the size of rod signal, constant for threshold; theta, theta(D) are steady backgrounds of light and receptor noise; varphi is the threshold flash with sigma a constant of about 2.5 log td sec; B the fraction of pigment in the bleached state.
(8) The amino acid composition of purified sigma 28 protein and the amino acid sequences of tryptic peptide fragments have been determined.
(9) Together, these findings suggest that sigma agents may have cerebroprotective effects.
(10) Left ventricular cavity and muscle areas of each image were planimetered with a light-pen system and summated for volume: total volume = sigma (areas x 3 mm).
(11) It also suggests that the -10 and its downstream regions are more important than the -35 region for the formation of the E sigma A-P2 promoter open complex.
(12) We also observed a significant correlation between the Ki values for sigma compounds to inhibit [3H]pirenzepine binding and their IC50 values to inhibit carbachol-stimulated phosphoinositide turnover.
(13) Vascular permeability was evaluated by use of the fluid filtration coefficient (Kf) and the osmotic reflection coefficient for total proteins (sigma, hematocrit-protein double indicator technique), and pulmonary capillary pressure (Pc) was estimated by the double occlusion technique.
(14) Sigma is a surface area-independent indicator of microvascular permeability when determined for specific protein molecules at high transmicrovascular fluid fluxes.
(15) A method is described for the rapid purification of DNA-dependent RNA polymerase sigma-70 holoenzyme from Escherichia coli.
(16) For each investigated case, the post-operative temporal average of sigma S was calculated (sigma S) and a value of 1.25 was used as discriminating threshold.
(17) To determine the relationship between SVR and sigma es, left ventricular afterload and contractility were pharmacologically altered in eight dogs instrumented with central aortic microtip and Swan-Ganz thermodilution catheters.
(18) The standard derivation, sigma 10 of analysis of water samples was 1.08-1.23% while for blood plasma sigma 6 = 2.02-2.62%.
(19) The mechanical properties of compressed beam specimens of microcrystalline cellulose (Avicel pH 101) have been assessed in terms of the tensile strength (sigma t), Young's modulus (E) and the following fracture mechanics parameters: the critical stress intensity factor (KIC), the critical strain energy release rate (GIC) and the fracture toughness (R).
(20) In Escherichia coli the genes encoding ribosomal protein S21 (rpsU), DNA primase (dnaG), and the 70-kDal sigma subunit of RNA polymerase (rpoD) are contained in a single operon.
Sigmoid
Definition:
(a.) Alt. of Sigmoidal
Example Sentences:
(1) [Ca2+]i exhibited a sigmoidal dependence on [Na+]o. Mg2+, a competitive inhibitor of Na2+-Ca2+ antiport in these cells, antagonized the increase in [Ca2+]i produced by lowering [Na+]o.
(2) These two types of transfer functions are appropriate to explain the transition to anaerobic metabolism (anaerobic threshold), with a hyperbolic transfer characteristic representing a graded transition; and a sigmoid transfer characteristic representing an abrupt transition.
(3) We report a retrospective study of 107 cases of carcinoma of the sigmoid colon and upper rectum treated for primary cure at the University of California at Los Angeles Hospital between 1955 and 1970.
(4) As to complications they recorded in one case mucosal bleeding after gastrofiberoptic polypectomy and in one case a covered perforation of the sigmoid at the site of colonoscopic polypectomy.
(5) The sigmoidal shape of the curve of rate constant vs mole percent anionic lipid is consistent with a positively cooperative effect of the negative surface charge.
(6) The pH dependence of this spectral change gave a sigmoidal curve fitted well to a theoretical curve of a cooperative release of two protons with a pK value of 7.5, indicating the existence of the acidic and alkaline forms of the ferrous CO enzyme.
(7) After addition of triiodothyronine, malic enzyme mRNA accumulated with sigmoidal kinetics, approaching a new steady state at 36-48 h after adding hormone.
(8) Furthermore, illustrations of the types of transfer characteristics observed in different individuals and different training regimens can be obtained, including both hyperbolic (Michaelis-Menten) and sigmoid transfer characteristics.
(9) Substrate saturation curves of the native enzyme show sigmoid shape, whereas the enzyme liberated from the bacteria in the presence of l-serine exhibits normal Michaelis-Menten kinetics.
(10) It is concluded that the state of ureterointestinal anastomoses and the sigmoid should be assessed specifically in postureterosigmoid anastomosis patients with impaired renal function.
(11) We have presented a case of internal herniation of small bowel through the sigmoid mesocolon in a pregnant woman.
(12) It has been found that the tm shift decreases sigmoidally from 4.7 to -0.3 degrees C as the bulk pH is raised from 5 to 11.
(13) Literature review showed this to be the first reported case of sigmoid sinus thrombosis in congenital aural atresia.
(14) We present a case of colonic varices not associated with portal hypertension but secondary to prior sigmoid resection and inferior mesenteric vein occlusion.
(15) The fibrorectosigmoidocope Olympus TCF I S, has been systematically applied to the exploration of the distal colon (rectum and sigmoid) in patients with intestinal or digestive extra intestinal symptoms.
(16) For the experimental studies, fractures of the jaw bone in terms of oblique osteotomies from angle to sigmoid notch of the mandible of the Malaysian monkeys were made by using #700 fissure bur and reduced and fixed them in terms of interosseous wiring.
(17) The mechanical force-deflection response was sigmoidal with continuously changing resistance.
(18) The data relative to the guanidine-induced unfolding show a sigmoidal increase of the distribution width, which is due to the transition of the protein structure from the native to the random-coiled state.
(19) Left angiography, performed in August, 1975, revealed a dural arteriovenous malformation, which was supplied by enlarged left middle meningeal artery, occipital artery, meningohypophyseal artery and superior cerebellar artery and was draining into the left sigmoid sinus.
(20) If the patient has hematochezia or the excretory urogram demonstrates ureteral obstruction sigmoid and colonoscopy should be done.