Thank you for such interesting videos! They are very inspiring to explore the world around us. I bought myself a microscope and now I can also observe microorganisms at all magnifications.
They move using flagella. Each cell (round) has its own flagellum. This way, colonies can more successfully move through the water column to illuminated places than alone.
@@user-sk1ko8kt2v This is absolutely correct with respect to its natural movement. However, the second half (zoomed in view) of the video uses my 40x oil immersion lens. When I apply pressure to the lens while trying to focus deeper into the slide, this can cause movement of the water due to the downward pressure on the cover slip. While I did my best in this video to select clips with minimal change of pressure, some of the movement might be attributable to that.
@@ThaiMicrocosmosI didn't notice this in the video, I thought it meant the normal movement of the seaweed. It often happens that the sample is not thin enough to allow the entire object to be viewed using oil immersion objectives. It often happens to me that I want to look at an object on a 90 lens, but a small grain of sand gets into the sample, which prevents me from focusing on the object normally due to the small focal length of the lens. And this is a problem, because the sample literally should not contain anything solid higher than about 0,5 mm. It should be very small. And in order to examine a large rotifer (about 0.7 mm in length) at 900x or more, you have to crush it with a cover glass or reduce the water very carefully so as not to crush such large organisms.
All great points. However I routinely violate most of those rules when shooting with my 40x oil :-) overall some of my best footage comes from that objective, I do my best to optimize the environment when using it. @@user-sk1ko8kt2v
![The moment we stopped understanding AI [AlexNet]](/img/n.gif)
Thank you for such interesting videos! They are very inspiring to explore the world around us. I bought myself a microscope and now I can also observe microorganisms at all magnifications.
Thanks. Happy you're taking a look yourself -- it's incredibly rewarding.
cool
What's making them move so much?
They move using flagella. Each cell (round) has its own flagellum. This way, colonies can more successfully move through the water column to illuminated places than alone.
@@user-sk1ko8kt2v This is absolutely correct with respect to its natural movement. However, the second half (zoomed in view) of the video uses my 40x oil immersion lens. When I apply pressure to the lens while trying to focus deeper into the slide, this can cause movement of the water due to the downward pressure on the cover slip. While I did my best in this video to select clips with minimal change of pressure, some of the movement might be attributable to that.
@@ThaiMicrocosmosI didn't notice this in the video, I thought it meant the normal movement of the seaweed. It often happens that the sample is not thin enough to allow the entire object to be viewed using oil immersion objectives. It often happens to me that I want to look at an object on a 90 lens, but a small grain of sand gets into the sample, which prevents me from focusing on the object normally due to the small focal length of the lens. And this is a problem, because the sample literally should not contain anything solid higher than about 0,5 mm. It should be very small. And in order to examine a large rotifer (about 0.7 mm in length) at 900x or more, you have to crush it with a cover glass or reduce the water very carefully so as not to crush such large organisms.
All great points. However I routinely violate most of those rules when shooting with my 40x oil :-) overall some of my best footage comes from that objective, I do my best to optimize the environment when using it. @@user-sk1ko8kt2v
@@ThaiMicrocosmos Huh I guess I always thought that plants wouldn't have the ability to move like animal cells. Interesting stuff.