<transcript><audio_33>and his assistants also learned to prepare and use nutrient materials nutrient materials are usually jelly-like emulsions or fluids which favor the growth of bacteria Koch made other discoveries that help lay the</transcript><video><caption><image_34>The image shows a close-up of a person's hand wearing a white glove. The hand is holding a small piece of paper and appears to be in the process of making something. The background is blurred, but it seems like the person is working on a craft project. There are several other glassware and objects scattered around the table, including a beaker and a glass of wine. The overall mood of the image is one of concentration and craftsmanship.</caption><caption><image_35>The image shows a pair of hands wearing white gloves, working on a piece of glass. The hands are positioned in a way that they are holding the glass with their fingers. The glass appears to be transparent, allowing the viewer to see the contents inside. In the background, there are several other glasses and a tray, suggesting that the person is in the process of making a drink. The image is taken from a low angle, so the focus is on the hands and the glass.</caption><caption><image_36>The image shows a person's hand holding a small glass jar with a lid. The jar appears to be made of transparent glass and has a small oval-shaped lid on top. The lid is slightly open, revealing the contents inside. The person is holding the lid with one hand and the other hand is resting on top of the jar. In the background, there are several other glass jars and a glass of wine on a wooden table. The image is taken from a low angle, looking up at the jar and the lid.</caption><caption><image_37>The image is a still from a movie or TV show. It shows an elderly man sitting at a table in a room with a window and curtains in the background. He is wearing a black suit and appears to be deep in thought. On the right side of the image, there is a wooden shelf with various items on it. In the background, there are two other people sitting at the table, one of them is playing a saxophone. The overall mood of the scene is somber and contemplative.</caption></video><transcript><audio_38>foundations of modern bacteriology since the time of Koch much has been learned and many other kinds of bacteria discovered today if Ted could collect all known kinds of bacteria he would have thousands and the fact that have been discovered about them are</transcript><caption><image_39>The image shows two men in a laboratory setting. They are both wearing white lab coats and appear to be working on a scientific experiment. The man in the foreground is using a microscope, which is placed on a wooden table in front of him. He is looking through the microscope with a focused expression on his face. Behind him, there is another man who is standing and appears to be observing the experiment. On the table, there are several test tubes and other scientific equipment. The room is well-lit with natural light coming in from the windows on the left side of the image.</caption><caption><image_40>The image shows two men in a laboratory setting. They are both wearing white lab coats and appear to be engaged in a scientific experiment. The man on the left is looking intently at the microscope, while the man in the middle is looking at the other man. On the table in front of them, there are several test tubes and other scientific equipment. In the background, there is a white cabinet and a window. The image appears to be from the early 20th century.</caption><transcript><audio_41>exceedingly numerous he wonders how a beginner can ever learn about so many kinds of bacteria Frank explains that it takes a systematic approach for example bacteria may be separated into groups according to what they live upon the</transcript> and his assistants also learned to prepare and use nutrient materials nutrient materials are usually jelly-like emulsions or fluids which favor the growth of bacteria Koch made other discoveries that help lay the foundations of modern bacteriology since the time of Koch much has been learned and many other kinds of bacteria discovered today if Ted could collect all known kinds of bacteria he would have thousands and the fact that have been discovered about them are exceedingly numerous he wonders how a beginner can ever learn about so many kinds of bacteria Frank explains that it takes a systematic approach for example bacteria may be separated into groups according to what they live upon the
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