Studies on Protective Coating. XV

Studies on Echinococcosis Xv : Secondary Multilocular Echinococcosis by Intrahepatic Inoculation

Beneficial effects of Y2O3 dispersion on Al2O3 protective coating

We have studied the mechanism by which dispersed Y 2 0 3 exerts beneficial effects on the oxidation protection of an A1203 coating (film) on the basis of the following models: 1) Y2O3 suppresses surface segregation of S by trapping it in the alloy matrix and accordingly suppresses spalling of the A1203 film; 2.1) The diffusion of alloying elements into the N2o3 film is retarded by dispersed oxi...

SiC protective coating for photovoltaic retinal prosthesis.

OBJECTIVE To evaluate plasma-enhanced, chemically vapor deposited (PECVD) amorphous silicon carbide (α-SiC:H) as a protective coating for retinal prostheses and other implantable devices, and to study their failure mechanisms in vivo. APPROACH Retinal prostheses were implanted in rats sub-retinally for up to 1 year. Degradation of implants was characterized by optical and scanning electron mi...

Studies on defects in galvanized coating on steel wire

Causes for deposition of defective galvanized coating (lumpy deposition of coating during hot dip galvanizing) of carbon-steel wire have been investigated. It is established that the lumpy deposition is caused due to segregation of silicon on the surface of steel wire. Due to this change in composition of the steel at surface, the regions get modified and lie in Sandelin hyper reactive zone. Th...

Studies of Gallbladder Function. Xv. Cholesterol in Human Liver Bile.

The subject of bile drainage in the human has been very thoroughly reviewed by Fox (1) in 1928. Numerous papers have appeared, among which may be mentioned those of Walters, Green and Frederickson (2), Ravdin, Johnston, Riegel and Wright (3), and Elman and Graham (4), describing the changes occurring in hepatic bile obtained from patients with surgical drainage after the release of biliary obst...