Objective: The aims of this study were to investigate the release of element from, and the biological response in vitro to, cobalt-chromium alloys and other base-metal alloys used for the fabrication of metal-ceramic restorations. Material and methods: Eighteen different alloys were investigated. Nine cobalt-chromium alloys, three nickel-chromium alloys, two cobalt-chromium-iron alloys, one pal...

The construction and performance characteristics of a novel chromate ion-selective membrane sensor are described and used for determining chromium(III) and chromium(VI) ions. The sensor is based on the use of a rhodamine-B chromate ion-associate complex as an electroactive material in a poly(vinyl chloride) membrane plasticized with o-nitrophenyloctyl ether as a solvent mediator. In a phosphate...

A n h y d r o u s c h r o m i u m ( I I I ) c h l o r i d e r e a c t s w i t h p u r e c a r b o x y l i c a c i d s ( R C O O H w h e r e R = C H 3 , C 2 H 5 , n C 3 H 7 , C H 2 C I , C H C I 2 a n d C C 1 3 ) t o g i v e b a s i c t r i n u c l e a r c h r o m i u m ( I I I ) c a r b o x y l a t e s o f t h e g e n e r a l f o r m u l a [ C r 3 0 ( 0 0 C R ) 6 ] + C l ~ . T h e r e a c t i o...

This is the second in a series of peer-reviewed practice tip articles, each including two or three fact sheets on feed additives for swine. The previous practice tip, published in the September-October issue of the Journal of Swine Health and Production, included fact sheets on acidifi ers and antibiotics (J Swine Health Prod. Future fact-sheet topics will include fl avors; high dietary levels ...