For viable counting, 0.1 ml. volumes of bacterial suspension were incorporated in 1.5-2 ml. nutrient agar, which after mixing was allowed to solidify in an almost horizontal test-tube so as to produce a 3 4 in. agar strip. After incubation in the vertical position, the counts of the strips gave estimates of a bacterial population which did not differ significantly from that obtained from plates...

The characteristics of local heat transfer and pressure drop were investigated experimentally for the vertical up-flow boiling of refrigerant R1234yf in two types of aluminum multi-port extruded tubes having 16 channels with a crosssection of 0.91 × 0.21 mm (tube A) and 40 channels with a cross-section of 0.34 × 0.21 mm (tube B). At an evaporating temperature of 15 °C, the local heat transfer c...

When liquid is added to a foam at sufficiently large flow rates, convective bubble motion will occur. Experiments are described in which the foam is confined in a tube which is tilted from the vertical. The theory of foam drainage is applied to this problem to show that the critical angle of tilt theta(c) at which convection occurs is related to the liquid flow-rate Q by theta(c) proportional t...

Experiments to determine positions of spherical and long particles and the orientation of long particles can be carried out in a stationary frame by fluidizing particle in a balance of the buoyant weight of the heavier than liquid particle with (1) drag, which will be realized in a vertical tube apparatus (2) hydrodynamic lift (perpendicular to flow, as in a lifting aircraft) which will be real...

Plug conveying along a horizontal tube has been investigated through simulation, using a discrete element simulation approach for the granulate particles and a pressure field approach for the gas. The result is compared with the simulation of the vertical plug conveying. The dynamics of a slug are described by porosity, velocity and force profiles. Their dependence on simulation parameters prov...

The incidence of recurrent pneumothoraces was analyzed in mechanically ventilated patients with the adult respiratory distress syndrome (ARDS) or non-ARDS causes of respiratory failure who had ipsilateral chest tubes in place. The radiographs of 39 consecutive patients with 47 initial pneumothoraces were evaluated for pneumothorax recurrence and chest tube positioning, which was prospectively d...

A new operation for the restoration of continuity between the right ventricle and pulmonary circulation in truncus arteriosus in infancy without the use of a tube graft is described. This was achieved by anastomosing the inferior margin of the detached confluent branch pulmonary arteries to the apex of a vertical infundibular ventriculotomy to form the posterior wall of the reconstructed right ...

To obtain representative data, particle loss in sampling tubes must be minimal; otherwise, the magnitude of losses known so it can corrected. Since sample occurs through various mechanisms and depends on size, airflow velocity, Reynolds number, there is no simple method to predict multitudinous configurations tubes. This study aims present a for experimentally determining as function sizes. Mor...

objective the purpose of this study was to assess the frequency of complications of endotracheal intubation (eti) in neonates. methods the newborns that were admitted and needed urgent or semi-urgent intubation were enrolled in this study over a 1 year period. route for intubation in all cases were orotracheal. cases were not routinely sedated or paralyzed. the patients were clinically and radi...