Experimental and computed losses and reactor tube temperature profiles are presented for three ammonia receiver/reactor geometries operating on a 9 m dish concentrator. Preliminary analysis of receiver losses indicates that as the half cone angle of the receiver tube frustum reduces – from 17.5o to 7.5o to 3.7o – there is a shift from convection-dominated losses to radiation-dominated losses. T...

the night previous to the attack, and that two of his co-villagers have died of the same disease within a month. At 9-3 A. M. laryngotomy was at once performed by Dr. Roy under chloroform, and the tube inserted. A gush of air and frothy mucus, surcharged with blood, came out with the first and subsequent efforts of expiration through the tube. The patient felt immediate relief after operation, ...

in this study, selenium was recovered from an industrial dust. after the purification process, the researchers were able to prepare selenium micro powder. the objective of this study was to prepare selenium nano particles by water solution phase method from the micro powders. the results showed that selenium micronized powder and nano particles had high purity. the obtained nanoparticles were t...

Dear Editor, Compression of endotracheal tube in palatopharyngeal surgery is an inherent problem. Many modifications of the Davis mouth gag have been used. The tongue blade has also undergone various modifications to prevent endotracheal tube compression. A slot and a middle groove have been incorporated to prevent the tube compression. This definitely reduced the magnitude of the problem. Late...

In this paper, hydroforming process of bent tubes in T-shaped die is studied for pulsating and linear pressure paths by the finite element method. Forming Limit Diagrams (FLDs) and thickness distribution curves are used to investigate the effect of pulsating pressure on hydroforming process. In addition, the obtained numerical results are compared with experimental results of hydroforming of st...

farmers in the indus basin, pakistan have generally switched to groundwater for additional water supplies due to the irregular supply of irrigation water; currently over 50% of the agricultural land in the basin is at least partially irrigated by tube-wells. these wells pump fresh groundwater, which essentially is the result of massive leakage from irrigation canals into the originally saltwate...

This study had the objective to evaluate effect of irrigation and fertigation (N) in crop yield its impact on total cost, addition influence conductivity hydraulic capacity logarithmic an Oxisol under vinasse application cultivated with sugarcane (second year), state Goiás, Brazil. The experimental design comprised randomized blocks a 5 × 2 factorial scheme, four replications. Treatments consis...

the effect and arrangement of cytoskeleton (microtubules, microfilaments and neurofilaments) in neurulation of chick embryo examined by immunoperoxidase method from stage 6 to stage 12. the results were as follows: 1) microtubules aggregated in the perinuclear region from which they radiated to take longitudinal course beneath the membrane. 2) microfilaments were aggregated in the apical ends (...

The extremely high thermal conductivity of individual carbon nanotubes, predicted theoretically and observed experimentally, has not yet been achieved for large nanotube assemblies. Resistances at tube-tube interconnections and tube-electrode interfaces have been considered the main obstacles for effective electronic and heat transport. Here we show that, even for infinitely long and perfect na...