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Biomedical subjects

R Brener

Publications and source records attributed to R Brener.

14 recordsLinked to original sources
PubMed1993

Bone growth to metal implants is regulated by their surface chemical properties.

Bony ingrowth to control (non-treated) and heat-treated stainless steel and Ti-6Al-4V implants into the medullary canal of the femur in rats was studied by mechanical, chemical and Auger electron spectroscopic methods. At all time intervals up to 35 d post-implantation, the shear strengths of the heat-treated Ti-6Al-4V and stainless steel implants were significantly higher (1.6-fold to 3.4-fold) than in control implants. Using Auger electron spectroscopy depth profiling methods, it was found that the heat treatment modified the implant surface composition significantly, resulting in a thicker oxide layer and other chemical changes. It is concluded that heat treatment of metal implants prior to their insertion alters their chemical surface properties and augments bony ingrowth to them.

Alloys↗
PubMed1983

Learning the deictic meaning of third person pronouns.

Forty-two children (2;8-5;7) viewed video-taped "scenes' in which a SPEAKER addressed sentences containing a personal pronoun which referred to him/herself, the ADDRESSEE or a male or female OTHER. The child's task was to identify the referent of the pronoun. No other cues to the identity of the referent were given. Errors showed that initially gender was the variable used to identify referents and that person was used only later. Several of the oldest children still used only gender in some types of utterance situations. This was because the deictic roles OTHER and, to some extent, ADDRESSEE, were not fully understood until relatively late. Possible explanations concerned the use of Baby Talk to children and information processing necessary for referent identification.

Child↗