E-Portfolio: Microbiology - Week 11

This week instead of having class in the lecture room, we had our first road trip!! 

We went to Institut Biosains (IBS), a place where the post graduate students done their researches and what not. Basically, the main reason we went to IBS is to learn more on Electron microscopy. Mr. Nazmi, a master degree student was the one who leads and guide us during the trip. 

There, we met Kak Farah who is one of the staffs at IBS. She explained to us one the Scanning Electron Microscope, the Transmission Electron Microscope, the Ultramicrotome process and also the processes needed to be done for the sample to be observe under the microscope. She is such a friendly and nice person. 

Here are some picture I want to share with you guys. 






During our lab session this week, we had done the experiments on oxygen requirement for microbial growth and anaerobic system. 

Basically, there are aerobic and anaerobic microbes that can be classified into: 

Aerobic: Aerobe grow in ambient air, which contains 21% oxygen and small amount of (0.03%) of carbon dioxide.

Microaerophilic: Microaerophiles are those groups of bacteria that can grow under reduced oxygen (5% to 10%) and increased carbon dioxide (8% to 10%).

Anaerobic: Usually bacteria of this group cannot grow in the presence of oxygen, oxygen is toxic for them.

Aerotolerant: anaerobic bacteria do not use oxygen to make energy, but they can survive in the presence of oxygen.

Obligate anaerobes: These bacteria grow only under condition of high reducing intensity and for which oxygen is toxic.

Facultative anaerobes: They are versatile organisms, capable of growth under both aerobic and anaerobic conditions.

This is the culture of Saccharomyces cerevisiae that can be seen on the upper part of the medium. Can you guess which type of organism it is ? 


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