نتایج جستجو برای: environmental enrichment

تعداد نتایج: 408801  

Journal: :Laboratory animals 2003
P P Tsai H D Stelzer H J Hedrich H Hackbarth

Environmental enrichment is intended to improve the well-being of laboratory animals. Although many researchers have indicated that environmental enrichment may enhance animal well-being, there is some evidence that enrichment differs in its effects on physiology and behaviour between species and strains. The present study focuses on the effects of different enrichment designs on the physiology...

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...

Journal: :Proceedings of the National Academy of Sciences 2000

Journal: :Proceedings of the Royal Society B: Biological Sciences 2013

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