Công nghệ cơ khí hay kỹ thuật cơ khí là ngành ứng dụng các nguyên lý vật lý để tạo ra các loại máy móc và thiết bị hoặc các vật dụng hữu ích. Cơ khí áp dụng các nguyên lý nhiệt động lực học, định luật bảo toàn khối lượng và năng lượng để phân tích các hệ vật lý tĩnh và động, phục vụ cho công tác thiết kế trong các lĩnh vực như ô tô, máy bay và các phương tiện giao thông khác, các hệ thống gia nhiệt và làm lạnh, đồ dùng gia đình, máy. | 166 Environmental Monitoring 4. Conclusion This study involved the establishment of an index using multiple elements which is in the early phase of development for use in biological monitoring. Of course a detailed study using the index is necessary in order to increase our understanding of contamination of wildlife with multiple elements. However interestingly the survey revealed that a similar index could be obtained despite the investigation of multiple elements. Further the difference between the degree of contamination by multiple elements in dabbling ducks and in diving ducks was clarified using this index. These results suggest that an understanding of the equilibrium among elements in the animal body is important for the investigation of contamination by multiple elements. 5. Acknowledgement The study of Cd indexes was supported by Grant-in-Aid no. 20580344 from the Ministry of Education Science Sports and Culture Japan. The study of the index for multiple elements was supported by River Fund in charge of the Foundation of River and Watershed Environment Management FOREM Japan Nr. 22-1215-016 . The pilot study of factor analysis was presented at the 35th Annual Meeting of Japanese Avian Endocrinology in Okayama Prefecture. The attendance of students at this meeting was supported by Lion Trading Co. Ltd. Tokyo Japan. 6. References Colborn T. Dumanoski D. Myers . 1996 . Our stolen future Are we threatening our fertility intelligence and survival -a scientific detective story Spieler Agency New York USA. trans. into Japanese Nagao T. Syoeisya Tokyo . ISBN 978-4881359853 Friberg L. Piscator M. Nordberg G. F. Kjellstrom T. 1974 . Cadmium in the environment. CRC press Ohio USA 1974 trans. into Japanese Ishiyaku Publisher Harding . Harris . Elliott . 1998 . Heavy and trace metals in wild mink Mustela vison and river otter Lontra canadensis captured on rivers receiving metals. Bulletin of Environmental Contamination and Toxicology Vol. 61
