(n.) Exposure to the free action of the air; airing; as, aeration of soil, of spawn, etc.
(n.) A change produced in the blood by exposure to the air in respiration; oxygenation of the blood in respiration; arterialization.
(n.) The act or preparation of charging with carbonic acid gas or with oxygen.
Example Sentences:
(1) A theory for the neural control of middle ear aeration is proposed.
(2) It is suggested that lung ventilation takes place in the avian embryo in three distinct stages: the major air-ways become aerated, then respiratory movements begin and lastly the tertiary bronchi are slowly aerated.
(3) We therefore investigated the influence of different carbon dioxide tensions and bicarbonate concentrations on directly measured pH of organ baths aerated with mass-spectrometric analyzed O2-CO2 gases.
(4) The test organism, grown under anaerobic conditions in Trypticase soy broth, was diluted in buffered salt solution, and about 2 x 10(4) cells were suspended in 10 ml of an aerated broth.
(5) On the other hand, maintaining constant DO levels at 50 or 10% raised exoprotein levels higher than those achieved in a culture grown at the optimal aeration rate.
(6) None of the mutants are oxygen sensitive; they grow as well as wild bacteria, even when aerated.
(7) In helical strips of dog cerebral arteries contracted with K+ or prostaglandin F2 alpha, the increase in CO2 from 5 to 15% in the gas aerating the bathing media produced a persistent relaxation in association with a rise of PCO2 and a fall of pH and PO2.
(8) Although X-ray studies in many of the patients revealed mucosal swelling four weeks after surgery, the maxillary sinuses were well aerated 8 weeks after operation.
(9) One problem remains: permanent aeration of the new tympanic cavity.
(10) The time of the sporulating forms appearance depended on the aeration rate which defined the quantitative composition of the population during the phase of the culture active growth and the stationary phase.
(11) Azotobacter chroococcum (ATCC 7493) was grown in continuous culture with intense vortex aeration (stirring rate 1750 rpm) with up to 50% O2 in the gas phase.
(12) Assays on the Rm nifA-m RNA produced by the constitutive Rm nifA in E. coli under aerobic and microaerobic conditions with the cloned nifA as a probe for dot blot hybridization showed a marked decrease of Rm nifA mRNA when the bacteria were grown under aeration.
(13) Acute anoxia was induced by aerating a muscle chamber with a gas mixture of 95% nitrogen and 5% carbon dioxide.
(14) Amylase production by a Bacillus subtilis strain can occur without aeration after reaching the stationary phase of growth, provided the pH is controlled.
(15) The photosynthetically-incompetent mutant V-2 of Rhodopseudomonas spheroides which is incapable of synthesising bacteriochlorophyll was grown aerobically under conditions of both high and low aeration.
(16) The fim(+) bacteria did not show selective outgrowth in mixed cultures grown in broth aerated by continuous shaking, in static broth incubated anaerobically in hydrogen, and on aerobic agar plates, i.e., under conditions not allowing an advantage from pellicle formation.
(17) The rate of alpha-keto acid biosynthesis, on the contrary, decreased in the conditions of low aeration.
(18) Pyruvate-dependent glutamine aminotransferase activity is not regulated directly by O2 itself since a rho- strain showed a high activity regardless of the extent of aeration of cultures.
(19) Bacteriorhodopsin formation was negligible when washed suspensions of cells from dark, limited aeration or light, adequate aeration cultures were incubated in the light with limited aeration.
(20) Seventy two left anterior descending and circumflex coronary artery rings were removed in twelve dogs and mounted in organ chambers filled with Krebs-Ringer bicarbonate solution and aerated with 95% O2-5% CO2.
Ventilation
Definition:
(n.) The act of ventilating, or the state of being ventilated; the art or process of replacing foul air by that which is pure, in any inclosed place, as a house, a church, a mine, etc.; free exposure to air.
(n.) The act of refrigerating, or cooling; refrigeration; as, ventilation of the blood.
(n.) The act of fanning, or winnowing, for the purpose of separating chaff and dust from the grain.
(n.) The act of sifting, and bringing out to view or examination; free discussion; public exposure.
(n.) The act of giving vent or expression.
Example Sentences:
(1) Heart rate (HR), pulmonary ventilation (V), oxygen consumption (VO2), carbon dioxide production (VCO2), and respiratory quotient (RQ) were measured.
(2) We studied the hemodynamic changes caused by bronchoscopy under LA in mechanically ventilated patients and the effect of LA on the endoscopic decline in arterial pO2.
(3) They are best explained by interactions between central sympathetic activity, brainstem control of respiration and vasomotor activity, reflexes arising from around and within the respiratory tract, and the matching of ventilation to perfusion in the lungs.
(4) This study compares anaesthesia with controlled ventilation of the lungs with atracurium and alfentanil analgesia with halothane anaesthesia.
(5) In some experiments heart rate and minute ventilation (central vactors) appear to be the dominant cues for rated perceived exertion, while in others, local factors such as blood lactate concentration and muscular discomfort seem to be the prominent cues.
(6) We found that, compared to one- and two-dose infants, those treated with three doses of Exosurf were more premature, smaller, required a longer ventilator course, and had more frequent complications, including patent ductus arteriosus (PDA), intraventricular hemorrhage, nosocomial pneumonia, and apnea.
(7) Mechanical ventilation was soon instituted and several antibiotics and acyclovir were administered intravenously, with marked effects.
(8) Anaesthesia was maintained with artificial ventilation and alcuronium, or spontaneous ventilation with halothane.
(9) The patient and ventilator work ratios, and the work of breathing quantify factors which may be directly useful to the clinician and to future systems to automate weaning.
(10) Ten patients received intercostal nerve blockade on a total of 29 occasions in order to provide analgesia following liver transplantation and to facilitate weaning from artificial ventilation of the lungs.
(11) Ventilation-perfusion lung scans and contrast ascending venography were performed on the sixth to eighth postoperative days.
(12) The rabbits were either breathing spontaneously or were ventilated by a phrenic nerve-controlled servorespirator without the use of muscle relaxants.
(13) Although hypothyroidism is not a common cause of ventilator dependency, it might be more common than we think.
(14) In 8 animals, blood flow was measured during control and sequentially 1, 2, and 3 min after ventilation was stopped.
(15) HFV was delivered at frequencies (f) of 3, 6, and 9 Hz with a ventilator that generated known tidal volumes (VT) independent of respiratory system impedance.
(16) Since the early 1960's nasotracheal tubes have been used for neonates with primary respiratory diseases which necessitated positive pressure ventilation.
(17) Although the level of ventilation is maintained constant during eating and drinking, the pattern of breathing becomes increasingly irregular.
(18) A facility for keeping chickens free of Marek's disease (MD) was obtained by adopting a system of filtered air under positive pressure (FAPP) for ventilation, and by imposing restrictions on entrance of articles, materials and personnel.
(19) No change in breathing frequency, minute ventilation, and pulmonary gas exchange was observed.
(20) During the weaning period after 18 h of mechanical ventilation following open-heart surgery, central haemodynamics, systemic oxygen transport and total oxygen consumption were assessed in a total of 11 patients receiving continuous positive pressure ventilation.