The effects of F, B203 and P205 on the H 2 0 solubility in a haplogranite liquid (36wt .% SiO2, 39 wt. % NaA1Si3Os, 25 wt. % KAISi3Os) have been determined at 0.5, 1, 2, and 3 kb and 800, 850, and 900 ~ The H20 solubility increases with increasing F and B content of the melt. The H 2 0 solubility increase is more important at high pressure (2 and 3 kb) than at low pressure (0.5 kb). At 2 kb and...

Abstract Derived from Cinchona tree bark, quinine was first found to be beneficial health by indigenous Amazonian peoples. Seventeenth-century Jesuit missionaries sent the bark and seeds back Europe, where word of its therapeutic properties spread. Quinine promoted as an antiseptic treatment for a range ailments 1600s onward, including septicaemia, erysipelas scarlet fever. The dermatological r...

BACKGROUND Inspiratory muscle weakness is a recognised cause of unexplained dyspnoea. It may be suggested by the finding of a low static inspiratory mouth pressure (MIP), but MIP is a difficult test to perform, with a wide normal range; a low MIP may also occur if the patient has not properly performed the manoeuvre. Further investigation conventionally requires balloon catheters to obtain oeso...

BACKGROUND The cardiopulmonary effects of the combination of abdominal and thoracic pressures in humans have not been well delineated. OBJECTIVE To study the cardiopulmonary effects of 15 mm Hg of intra-abdominal pressure in the presence and absence of 10 cm H20 of positive end-expiratory pressure (PEEP). DESIGN Prospective. SETTING University hospital. METHODS Nine patients undergoing ...

Study objective: The pulmonary parenchyma in patients with acute respiratory failure (ARF) is commonly not involved in a homogenous disease process. Conventional mechanical ventilation (MV) at elevated positive end-expiratory pressure (PEEP) and peak inspiratory pressure (PIP) aims at recruiting collapsed or nonventilated lung units. Invariably, those pressures are also transmitted to the healt...

thyroid hormoned are known to influence acid and pepsin secretion,though exact mechanism(s) are not fully understood.in this study distention-stimulated acid and pepsin secretionof hypo and hyperthyroid rats were compared with controls.each group consisted of 8 N-mari rats from both sexs,weighing  246.6+_9.2g. hypo and hyper thyroid states were induced by administration of methimazole(500mg/l H...

spontaneous breathing as soon as possible 2 and lowpressure suction of the chest tubes after operation are critical.2, 3 Some ventilatory support is necessary, however, when a patient continues to have hypoventilation after operation. Pressure-controlled ventilation rather than volume-controlled ventilation has been recommended for such patients because it can deliver high inspired gas flows in...