Search found 19 matches
- Mon Sep 05, 2005 4:59 am
- Forum: General Discussion Forum and Community Announcements
- Topic: Challenges, contests and competitions...
- Replies: 6
- Views: 8937
Update
Last week I received an invitation to submit some images to the Olympus Bioscapes Contest. I took the opportunity to ask the organizer, Michael W. Davidson, what the passage "each potential winner must complete, sign and return certain prize release forms, including, but not limited to, an affidavit...
- Sun Aug 28, 2005 8:48 pm
- Forum: General Discussion Forum and Community Announcements
- Topic: Challenges, contests and competitions...
- Replies: 6
- Views: 8937
Hi Mike, I fear that participants of such contests often have to learn the hard way. Websites rarely give you all the information you need. Just imagine that months after sending in your work to a competition you actually receive an e-mail notification, telling you that you are a winner. The organiz...
- Sun Aug 28, 2005 7:47 pm
- Forum: General Discussion Forum and Community Announcements
- Topic: Challenges, contests and competitions...
- Replies: 6
- Views: 8937
Beware!
Hello! I hate to sound like a party-pooper, but I'd like to point out that at least some of these competitions are just badly disguised attempts to exploit naive amateurs and scientists. One example: winners of the Nikon Small World Competion are required to sign an affidavit saying "In consideratio...
- Mon Aug 22, 2005 4:17 am
- Forum: Photography Through the Microscope Gallery
- Topic: Euplotes
- Replies: 10
- Views: 9238
Hello, Wim!
I concur that your photo looks like a Stylonychia, but I'm really no expert for hypotrichs/stichotrichs.
If you really want to learn something about this group you should visit Peter Eigner's page http://members.nextra.at/p.eigner
I concur that your photo looks like a Stylonychia, but I'm really no expert for hypotrichs/stichotrichs.
If you really want to learn something about this group you should visit Peter Eigner's page http://members.nextra.at/p.eigner
- Sun Aug 21, 2005 2:59 pm
- Forum: Photography Through the Microscope Gallery
- Topic: Euplotes
- Replies: 10
- Views: 9238
That's correct, Wim. The main obstacle for scientists trying to resolve the phylogenetic relationship between organisms is to differentiate between homologies and analogies. In case of hypotrich and stichotrich ciliates there are some arguments (AFAIK both genetic and ultrastructural) that might out...
- Sun Aug 21, 2005 1:03 am
- Forum: Photography Through the Microscope Gallery
- Topic: Frontonia buccal area (for Oliver, Wim and Ron)
- Replies: 11
- Views: 7954
- Sun Aug 21, 2005 12:15 am
- Forum: Photography Through the Microscope Gallery
- Topic: Frontonia – cilia
- Replies: 6
- Views: 5524
The rod-like structures you can see in the cortex of Paramecium, Frontonia and related ciliates (a group scientifically called Peniculida) are trichocysts and mucocysts. Trichocysts are made of protein and can be ejected when the ciliate is injured or shocked. This is a very dramatic reaction, becau...
- Sat Aug 20, 2005 9:10 am
- Forum: Photography Through the Microscope Gallery
- Topic: Euplotes
- Replies: 10
- Views: 9238
Hello, Wim! The orientation of the AZM should be the same in all "Hypotrichs", though taxonomy has changed in a very confusing way. The classic group of hypotrich ciliates does not exist anymore. Today most of the former Hypotrichs are called "Stichotrichia". They remain in the class "Spirotrichea",...
- Sat Aug 20, 2005 7:35 am
- Forum: Photography Through the Microscope Gallery
- Topic: tiny rotifer without a name
- Replies: 4
- Views: 4272
Good point, Wim!
On the other hand I have no idea what rotifer testicles look like...
Anyway, here' a link to an illustrated rotifer database, that might help you to determine that little critter:
http://data.acnatsci.org/biodiversity_d ... php/browse
On the other hand I have no idea what rotifer testicles look like...
Anyway, here' a link to an illustrated rotifer database, that might help you to determine that little critter:
http://data.acnatsci.org/biodiversity_d ... php/browse
- Sat Aug 20, 2005 7:23 am
- Forum: Photography Through the Microscope Gallery
- Topic: Frontonia
- Replies: 6
- Views: 5007
- Fri Aug 19, 2005 1:57 am
- Forum: Photography Through the Microscope Gallery
- Topic: tiny rotifer without a name
- Replies: 4
- Views: 4272
Hi, Wim! Sorry, I can't help you with the identification. But I think, you might have caught a male individual. Most of the rotifers that you see are females. They reproduce by parthenogenesis. But from time to time male dwarf rotifers appear and sexual reproduction occurs, often followed by the pro...
- Fri Aug 19, 2005 12:54 am
- Forum: Photography Through the Microscope Gallery
- Topic: Euplotes
- Replies: 10
- Views: 9238
- Fri Aug 19, 2005 12:38 am
- Forum: Photography Through the Microscope Gallery
- Topic: Frontonia
- Replies: 6
- Views: 5007
- Wed May 25, 2005 10:29 pm
- Forum: Macro and Close-up Photography Gallery
- Topic: What are theese tiny creatures?
- Replies: 15
- Views: 10516
- Tue May 24, 2005 8:00 am
- Forum: Photography Through the Microscope Gallery
- Topic: cymbella
- Replies: 12
- Views: 8760
Hi ya' Oliver :!: :D What a wonderful video clip :!: I like to shoot videos, too, but I use a converted webcam for mine. I'm struck by the quality of your video. What equipment do you use to make these clips :?: :D (Don't mean to take over your topic, Wim :wink: :D ) Best regards, :D Thank you, Tom...