华中农业大学：《微生物学》课程PPT教学课件（英文版）Chapter 1 Microorganisms and Microbiology

Chapter 1 Microorganisms and Microbiology

Microorganisms and Microbiology Chapter 1

Chapter outline 1.1 What is a microbe? 1.2 The importance of Microbiology 1.3 Microbes in our lives 1.4 The history of microbiology 1.5 Important events in the development of microbiology

Chapter outline 1.1 What is a microbe? 1.2 The importance of Microbiology 1.3 Microbes in our lives 1.4 The history of microbiology 1.5 Important events in the development of microbiology

Concepts Microorganisms are responsible for many of the changes observed in organic and inorganic matter (e.g.,fermentation and the carbon,nitrogen and sulfur cycles that occurred in nature. The development of microbiology as a scientific discipline has depended on the availability of the microscope and the ability to isolate and grow pure cultures of microorganisms. Microbiology is a large discipline,which has a great impact on other areas of biology and general human welfare

Concepts • Microorganisms are responsible for many of the changes observed in organic and inorganic matter (e.g., fermentation and the carbon, nitrogen and sulfur cycles that occurred in nature. • The development of microbiology as a scientific discipline has depended on the availability of the microscope and the ability to isolate and grow pure cultures of microorganisms. • Microbiology is a large discipline, which has a great impact on other areas of biology and general human welfare

1.1 What is a microbe? The word microbe (microorganism)is used to describe an organism that is so small that can not be seen without the use of a microscope. Viruses,bacteria,fungi,protozoa and some algae are all included in this category

The word microbe (microorganism) is used to describe an organism that is so small that can not be seen without the use of a microscope. Viruses, bacteria, fungi, protozoa and some algae are all included in this category. 1.1 What is a microbe?

spor Our world is populated by invisible creatures too small to be seen with the unaided eye. These life forms,the microbes or microorganisms,may be seen only by magnifying their image with a microscope

Our world is populated by invisible creatures too small to be seen with the unaided eye. These life forms, the microbes or microorganisms, may be seen only by magnifying their image with a microscope

Microbial world Organisms Infectious agents (living) (non-living) Prokaryotes eukaryotes viruses viroids prions (unicellular) Eubacteria Archaea Algae Fungi Protozoa Other (unicellular (unicellular (unicellular) (multicellular or or organisms) multicellular) multicellular)

Microbial world Organisms (living) Infectious agents (non-living) Prokaryotes (unicellular) eukaryotes viruses viroids prions Eubacteria Archaea Algae (unicellular or multicellular) Fungi (unicellular or multicellular) Protozoa (unicellular) Other (multicellular organisms)

The size and cell type of microbes Most of the bacteria,protozoa,and fungi are single-celled microorganisms,and even the multicelled microbes do not have a great range of cell types.Viruses are not even cells,just genetic material surrounded by a protein coat and incapable of independent existence

Most of the bacteria, protozoa, and fungi are single-celled microorganisms, and even the multicelled microbes do not have a great range of cell types. Viruses are not even cells, just genetic material surrounded by a protein coat and incapable of independent existence. The size and cell type of microbes

The size and cell type of microbes Microbe Approximate range of Cell type sizes Viruses 0.01-0.25um Acellular Bacteria 0.1-10um Prokaryote Fungi 2μm->lm Eukaryote Protozoa 2-1000μm Eukaryote Algae l um-several meters Eukaryote

Microbe Approximate range of sizes Cell type Viruses 0.01-0.25µm Acellular Bacteria 0.1-10µm Prokaryote Fungi 2µm->1m Eukaryote Protozoa 2-1000µm Eukaryote Algae 1µm-several meters Eukaryote The size and cell type of microbes

1.2 The importance of microbiology Microbes impinge on all aspects of life,just a few of these are listed below: The environment→ Medicine→Food Biotechnology -Research

Microbes impinge on all aspects of life, just a few of these are listed below: The environment Medicine Food Biotechnology Research 1.2 The importance of microbiology

The environment Medicine 689 Biotechnology Press here to continue Research

• The environment • Medicine • Food • Biotechnology • Research Press here to continue