Introduction: Heavy metal pollution is one of the most serious environmental issues globally.In this research we were studied the heavy metal concentrations in sediment and fish in Persian gulf. Materials & Methods For determination of heavy metal concentrations in sediments 8 sampling stations were selected to measure Cd, Zn, Ni, Pb and Fe in the sediments and in the muscle tiss...

Received: 01/03/2014 Revised: 29/03/2014 Accepted: 29/03/2014 Abstract Two different enrichment procedures and plating methods for isolation of Listeria monocytogenes were compared while screening 1878 samples from animals (cattle475 Buffalo-70 and goats 385 ), human beings (240) and from environment (708). The methods of enrichment included a single step enrichment procedure using Buffered Lis...

This study considers the use of nonsocial environmental enrichment by captive chimpanzees at the Primate Foundation of Arizona. The goal was to determine whether a relationship existed between controllability of enrichment items by captive chimpanzees and frequency of use. The study measured controllability, the ability of nonhuman animals to alter aspects of their environment by the potential ...

Documenting the effects of novel forms of enrichment is becoming increasingly important within the field of environmental enrichment. Appropriate documentation and evaluation must accompany any enrichment research project in order for accurate results to be obtained. The objective of the present study was to provide an example of how the level of effort in documenting the effect of enrichment i...