tailieunhanh - Environmental Pollution Control Microbiology - Chapter 2

Vi khuẩn là nhóm quan trọng nhất của vi sinh vật trong môi trường. Nhiệm vụ cơ bản của họ là để chuyển đổi chết vấn đề sinh học với các vật liệu ổn định có thể được tái chế thành vật chất sinh học mới, giữ cho các hoạt động chu kỳ sinh học mà không có sự gián đoạn. Chỉ có một vài vi khuẩn gây ra các bệnh ở thực vật và động vật, nhưng những vi khuẩn sản xuất vài bệnh đã có một tác động sâu sắc về phát triển con người. Nó đã cho. | Chapter 2 BACTERIA Bacteria are the most important group of microorganisms in the environment. Their basic mission is to convert dead biological matter to stable materials that can be recycled back into new biological matter keeping the biological cycle functioning without disruption. Only a few bacteria cause diseases in plants and animals but those few disease-producing bacteria have had a profound impact on human development. It took people centuries before they recognized that bacteria caused many common diseases. Once it became known that bacteria could cause disease efforts were directed towards developing methods to control the disease-producing bacteria. The first approach to the control of disease-producing bacteria came from research on different chemicals that were toxic to the bacteria being studied. This was primarily the approach taken by medical researchers. A second experimental research approach examined the environment where the disease-producing bacteria were found. The environmental approach was slower than the medical approach as it required finding a solution and then making major changes in the environment rather than treating individuals directly. Eventually the environmental approach led to the development of large-scale environmental systems to reduce human exposure to disease-producing bacteria. The environmental approach proved to be an effective economical approach for improving the health of the public at large and allowed our populations to increase at a very rapid rate. The increased number of people and their increasing longevity placed new stresses on the environment creating environmental everywhere. Understanding the biology and the biochemistry of bacteria has helped in the development of biological pollution Copyright 2004 by Marcel Dekker Inc. All Rights Reserved. control systems to minimize the negative impact of pollution. The progress to date has helped make the United States one of the healthiest countries in the world and