The "internal bacteria" could also be cell organelles that are moving. I can not say anything about the type of cell, the 2-part nucleus is interesting. Certain white blood cells have lobed nuclei, but I do not know if this one belongs to that category.
Oliver
Search found 187 matches
- Sun Nov 16, 2014 11:02 pm
- Forum: Identification help
- Topic: Help ID please
- Replies: 2
- Views: 3736
- Sat Nov 15, 2014 7:08 am
- Forum: Beginner's corner
- Topic: Some questions regarding special features
- Replies: 17
- Views: 12005
Re: Some questions regarding special features
One aspect that has not been mentioned in this thread is that Koehler illumination also allows you to limit the illuminated area on the specimen to the area which is actually observed. this is done by closing the field diaphragm. There are two advantages: a. this reduces the heting of the specimen (...
- Fri Nov 14, 2014 6:07 am
- Forum: Introduce yourself
- Topic: The QCC from Kitchener, ON Canada
- Replies: 7
- Views: 11431
Re: The QCC from Kitchener, ON Canada
Halogen bulbs last a very long time, provided that you turn the microscope on slowly. Mine has been working since 1998. Halogen bulbs can always be exchanged by the user, there is a cover on the base of the microscope. see link below (spanish version). LED maybe not, because the contacts might be so...
- Tue Nov 11, 2014 6:12 am
- Forum: Pictures and Videos
- Topic: Gneiss, a metamorphic rock.
- Replies: 7
- Views: 4475
Re: Gneiss, a metamorphic rock.
given that the top and bottom pictures of Gneiss look (at least to my uneducated eyes) very different, what is the common characteristic that says "Gneiss"? I guess this has to do with the direction of the cut/polish. The top one might be parallel to the layers/crystals, the bottom images perpendic...
- Sat Nov 08, 2014 10:27 pm
- Forum: Pictures and Videos
- Topic: Amoeba (video)
- Replies: 6
- Views: 4470
Re: Amoeba (video)
Try to include the video like this:
[vimeo]111306337[/vimeo]
(this post will be removed)
[vimeo]111306337[/vimeo]
(this post will be removed)
- Sat Nov 08, 2014 10:26 pm
- Forum: Pictures and Videos
- Topic: Cell Walls
- Replies: 3
- Views: 2951
Re: Cell Walls
Hello,
The holes between the "segements" could be Plasmodesmata:
http://theplentyplant.blogspot.co.at/20 ... smata.html
These are the places where adjacent cells join for cell to cell communication. There are breaks in the cell wall.
Oliver.
The holes between the "segements" could be Plasmodesmata:
http://theplentyplant.blogspot.co.at/20 ... smata.html
These are the places where adjacent cells join for cell to cell communication. There are breaks in the cell wall.
Oliver.
- Fri Nov 07, 2014 10:44 pm
- Forum: Introduce yourself
- Topic: Lymia (français and English)
- Replies: 13
- Views: 10410
Re: Lymia (français and English)
Hello "Lymia", Welcome to the forum! For observing bacteria you need a microscope with a total magnification of at least about 400x (40x objective and 10x eyepiece). A microscope with a 100x oil immersion objective will give you 1000x maximum magnification. A total magnification of 2000x, as you wro...
- Fri Nov 07, 2014 12:29 pm
- Forum: Camera systems and imaging
- Topic: Very poor image with Omax camera
- Replies: 7
- Views: 12209
Re: Very poor image with Omax camera
Hello, Halogen will produce a more blue light at high intensities, the two images can therfore only be compared if taken at the same intensity. The left image shows both blue background and red specimen, I therefore think that the camera is able to show the full color range. If one of the color chan...
- Tue Nov 04, 2014 7:51 pm
- Forum: Pictures and Videos
- Topic: Closterium sp.
- Replies: 8
- Views: 5267
Re: Closterium sp.
Seb,
What lighting did you use? Did you use UV light and a dark-field filter? I tried it with blue light LEDs but without much success. The wavelength was, evidently, not correct.
Thanks,
Oliver.
What lighting did you use? Did you use UV light and a dark-field filter? I tried it with blue light LEDs but without much success. The wavelength was, evidently, not correct.
Thanks,
Oliver.
- Tue Nov 04, 2014 6:10 am
- Forum: Microscopes and optics
- Topic: New filters
- Replies: 6
- Views: 6684
Re: New filters
Hi,Oliver,may I ask what's the material you used to make filters? I used a color laser printer and printed the filters on heat-proof transparency foil (for laser printer). Transparency foil for ink jet printers ae probably not heat resistet enough. The filters do get hot when used. I have halogen l...
- Sun Nov 02, 2014 4:12 pm
- Forum: Beginner's corner
- Topic: What is the Illuminating Wavelength
- Replies: 3
- Views: 4276
Re: What is the Illuminating Wavelength
You got the fraction the other way around.
Resolution = L / (2*NA)
= 600nm / (2*0.65) = 0.46micrometers
compare this to the values in Table 2, here:
http://zeiss-campus.magnet.fsu.edu/arti ... ution.html
Oliver.
Resolution = L / (2*NA)
= 600nm / (2*0.65) = 0.46micrometers
compare this to the values in Table 2, here:
http://zeiss-campus.magnet.fsu.edu/arti ... ution.html
Oliver.
- Sun Nov 02, 2014 7:21 am
- Forum: About the website, the magazine and this forum
- Topic: Late magazine release
- Replies: 0
- Views: 4297
Late magazine release
I am still working on an article for the magazine, this is the reason why the pdf is a bit late this month.
Oliver
Oliver
- Sun Nov 02, 2014 7:14 am
- Forum: Home-made microscope adaptations
- Topic: Filter Template
- Replies: 6
- Views: 9570
Re: Filter Template
And also a thank you to 75RR for making the filter template available!
- Sun Nov 02, 2014 7:13 am
- Forum: Beginner's corner
- Topic: What is the Illuminating Wavelength
- Replies: 3
- Views: 4276
Re: What is the Illuminating Wavelength
Hello, The illumination wavelength is the wavelwngth of the light used to illuminate the specimen. It is the wavelength of the microscope lamp. You need to know this wavelength in order to calculate the theoretically maximum resolution. The shorter the wavelength, the higher the resolution. Now, the...
- Sat Nov 01, 2014 10:23 pm
- Forum: Home-made microscope adaptations
- Topic: Filter Template
- Replies: 6
- Views: 9570
Re: Filter Template
Here are some links on how to use the UFG filter!
http://www.photomacrography.net/forum/v ... sal+filter
http://www.photomacrography.net/forum/v ... hlight=ufg
Oliver
http://www.photomacrography.net/forum/v ... sal+filter
http://www.photomacrography.net/forum/v ... hlight=ufg
Oliver
- Thu Oct 30, 2014 10:09 am
- Forum: Pictures and Videos
- Topic: Milk- Globules of fat
- Replies: 6
- Views: 3874
Re: Milk- Globules of fat
A bit of milk added to paramecia (and other ciliates) makes the water movement visible.
Oliver.
Oliver.
- Wed Oct 29, 2014 5:22 am
- Forum: Pictures and Videos
- Topic: Crystals of sulphur
- Replies: 4
- Views: 3319
Re: Crystals of sulphur
put slide on a plate, horizontally and light the match right above it. The head of the match should be close to the slide and the flame should almost touch the slide. You can see that it forms a deposit on the glass slide. So you do not hold an already burning match to the slide, rather you burn the...
- Tue Oct 28, 2014 9:27 pm
- Forum: Pictures and Videos
- Topic: Crystals of sulphur
- Replies: 4
- Views: 3319
Re: Crystals of sulphur
Yes, it works! There seem to be two different types of crystals. Here are some under polarized light: http://www.microbehunter.com/pictures/2014/match-crystals-1.jpg And here in bright field (These crystals were not visible when placed between crossed polarization filters): http://www.microbehunter....
- Tue Oct 28, 2014 8:10 pm
- Forum: Beginner's corner
- Topic: Sample Jar Contents
- Replies: 10
- Views: 8055
Re: Sample Jar Contents
Feel bad about the rotifers and euglenas though. Yes, I understand what you mean, I sometimes think the same. But then again the concept of individuality maybe does not apply to these organisms. Everytime when I scratch my skin, I kill thousands of skin cells (and do not feel sorry for them). Maybe...
- Tue Oct 28, 2014 5:46 am
- Forum: Microscopes and optics
- Topic: Does anyone know something about Rheinberg illumination?
- Replies: 2
- Views: 3607
Re: Does anyone know something about Rheinberg illumination?
I wrote about Rheinberg filters in this issue: http://www.microbehunter.com/microbehunter-magazine-august-2012/ Make sure that the central patch stop is sufficiently dark. Otherwise there is too much light passing through and the specimen itself will be too bright, taking on the color of the patch s...
- Mon Oct 27, 2014 6:19 am
- Forum: Beginner's corner
- Topic: First newbie question for all you pros :D
- Replies: 1
- Views: 3122
Re: First newbie question for all you pros :D
Hello, I have only done fluorescence work once, long time ago, back at university, and my recommendations are based on darkfield, where you also have bright speimens on a dark background. The problem with automatic exposure is that the camera determines an average brightness of the image to set the ...
- Sun Oct 26, 2014 12:39 pm
- Forum: Microscopes and optics
- Topic: New to me Zeiss Microscope. Would like some help.
- Replies: 39
- Views: 22620
Re: New to me Zeiss Microscope. Would like some help.
I think that the Koehler illumination has to be managed by the optics beneath the stage. This is only about the lamp. The light is directed from the back of the microscope into the base of the microscope, from where it is redirected (prism or mirror) upwards towards the stage. The question is, if th...
- Sun Oct 26, 2014 7:27 am
- Forum: Home-made microscope adaptations
- Topic: dslr nikon 3100 to zeiss opmi nc 1 surgical microscope
- Replies: 3
- Views: 4332
Re: dslr nikon 3100 to zeiss opmi nc 1 surgical microscope
There are specific DSLR microscope adapters available:
http://www.martinmicroscope.com/product ... nts-zeiss/
But I do not know the specific requirements of your system.
Oliver
http://www.martinmicroscope.com/product ... nts-zeiss/
But I do not know the specific requirements of your system.
Oliver
- Sun Oct 26, 2014 7:07 am
- Forum: Microscopes and optics
- Topic: New to me Zeiss Microscope. Would like some help.
- Replies: 39
- Views: 22620
Re: New to me Zeiss Microscope. Would like some help.
First, it should not be a problem to get spare parts for a Zeiss. Second, did you consider converting the microscope to LED? Some people have done this already.
Oliver.
Oliver.
- Sat Oct 25, 2014 11:08 pm
- Forum: Home-made microscope adaptations
- Topic: dslr nikon 3100 to zeiss opmi nc 1 surgical microscope
- Replies: 3
- Views: 4332
Re: dslr nikon 3100 to zeiss opmi nc 1 surgical microscope
Hello,
Please upload the jpg file directly, not the zip.
What is the cable for? This does not look like an SLR adapter. The numbers look like f-stops on a camera, however.
Oliver.
Please upload the jpg file directly, not the zip.
What is the cable for? This does not look like an SLR adapter. The numbers look like f-stops on a camera, however.
Oliver.
- Sat Oct 25, 2014 11:01 pm
- Forum: Camera systems and imaging
- Topic: Connecting a DSLR camera to a microscope
- Replies: 11
- Views: 20545
Connecting a DSLR camera to a microscope
I would like to invite all forum members to share their methods of connecting a DSLR to the microscope. What adapter are you using? What projection ocular? Any advice or tips? There seems to be much uncertainty about connecting a Digital Single Lens Reflex (DSLR) camera to a microscope. The advanta...
- Sat Oct 25, 2014 7:54 am
- Forum: Specimens, samples and slides
- Topic: Water organisms in cold water
- Replies: 6
- Views: 8698
Re: Water organisms in cold water
Hello, Organisms frequently become less active in colder temperature, because chemical reactions generally slow down the colder the temperature. Life, after all, is based on complex chemical reactions. At colder temperature, therefore, cell division is also generally slows down. I say generally, bec...
- Sat Oct 25, 2014 5:55 am
- Forum: Pictures and Videos
- Topic: Clover Leaf
- Replies: 3
- Views: 3807
Re: Clover Leaf
The guard cells of the stomates evidently store starch. They stain much darker (by the iodine) than the other cells.
Oliver,
Oliver,
- Fri Oct 24, 2014 9:46 pm
- Forum: Introduce yourself
- Topic: New Guy to Site (And really like it!)
- Replies: 1
- Views: 3347
Re: New Guy to Site (And really like it!)
There seem to be several people around who are interested in both astronomy and microscopy (myself included).
- Fri Oct 24, 2014 7:18 pm
- Forum: My microscope
- Topic: Zeiss Standard 16, Reichert Biovar and Stereo a chinese
- Replies: 17
- Views: 12989
Re: Zeiss Standard 16, Reichert Biovar and Stereo a chinese
Manfred,
On your Zeiss I can read the name "R. Drews" written with a pen. Did you buy the microscope from Rudolf Drews, the author of the book "Mikroskopieren als Hobby" (Falken Verlag, 1992)? If it is him, did you happen to know him personally?
Oliver
On your Zeiss I can read the name "R. Drews" written with a pen. Did you buy the microscope from Rudolf Drews, the author of the book "Mikroskopieren als Hobby" (Falken Verlag, 1992)? If it is him, did you happen to know him personally?
Oliver