Microbiology Week 3

Assalamualaikum and hello guys.... hw r u ?... I hope you all fine and great. I would like to share you what I learned in my third week of microbiology class with my energetic lecturer which is DR. Wan . My microbiology class is on Wednesday and Friday. For this week, on Wednesday Dr. Wan and my seniors went to the competition. And Dr. Wan got an award. Congratulations Dr. Wan. 😍😍😍So on Wednesday Dr. Wan gave a task to us in Open leaning MOOC. We all did the questions that related to microbiology. First of all I didn't understand the task as usual. But later on I can understand and did all the questions that Dr. Wan asked us to do. 😊😊😊 The task was like a bit game and it was actually interesting once you know how to play the task. In the task, there have a password and we have to find out the password. At last, we have to write the password in the space they provided. The task also help us to learn about microbiology and to revise what we had studied in past two weeks. I got the password of the task which is " Fungi Are Eukaryotes". 😅😅😅 The open leaning MOOC is not only in my university which is University Putra Malaysia but they are a lot of universities and colleges around the world. It will help us to communicate with the people are in the foreign countries. We can also share about the microbes and about new microorganisms in the open learning MOOC page.

    On Friday, we have microbiology class with Dr. Wan in afternoon. Afternoon usually hot and I was really sleepy before I enter the class. 😴😴😴But once Dr. Wan enter our class, it will make me fresh because Dr. Wan make some fun and the way Dr teach us are quiet different from others. On Friday, I learned about the microscopy. 🔬🔬🔬 The history of the microscopes

are the field of microscopy ( optical microscopy) has its roots in the 17th-century Dutch Republic, with some notable representatives such as Zacharias Janssen, Hans Lippershey, Jan Swammerdam, and Antonie van Leeuwenhoek. Van Leeuwenhoek is often considered to be the first acknowledged microscopist and microbiologist.

   Microscopy is the technical field of using microscopes to view objects and areas of objects that cannot be seen with the naked eye ( objects that are not within the resolution range of the normal eye). There are three well-known branches of microscopy which are optical, electron and scanning probe microscopy. Goals of microscopes are to produce a magnified image of the specimen, separate the details in the image, and render the details visible to the human eye or camera. Microscopy have two categories which are light microscopes and electron microscope. In light microscope have many varieties which are bright-field microscopes, dark-field microscopes, phase-contrast microscope, fluorescence microscopes and confocal microscope. I got learned about the parts of microscope which are ocular, body, nosepiece, objective lens, arm, mechanical stage, substage condenser, diaphragm, base with light source, field diaphragm lever, light intensity control, coarse focus adjustment knob, fine focus adjustment knob and the stage adjustment knobs. Bright-field microscope that use in lab requires stain and produce a dark image against a brighter background . Dark-field microscope image is formed by light reflected or refracted by specimen and produces a bright image of the object against a dark background. The phase-contrast microscope converts differences in refractive index into detected variations in light intensity. The phase-contrast is excellent way to observe living cells and stain is not necessary view internal structures of living organisms. The fluorescence microscopes exposes specimen to ultraviolet or blue light and the specimens usually stained with fluorochromes. Cell contains natural fluorescent substances example (chlorophyll) has been treated with fluorescent dye. The confocal microscopy is confocal scanning laser microscopy creates sharp, composite 3D image of specimens by using laser beam, aperture to eliminate stray light and computer interface. Confocal microscopy is the numerous applications including study of biofilms.