Search found 948 matches

by hkv
Mon Jul 06, 2020 7:20 pm
Forum: Pictures and Videos
Topic: Parental care with gastrotrichs
Replies: 10
Views: 185

Re: Parental care with gastrotrichs

Wow, amazing video of the amoeba eating the egg. Great work!
by hkv
Tue May 19, 2020 9:31 am
Forum: Resources (online, books etc.)
Topic: The discoverer of diatoms has been identified
Replies: 4
Views: 267

Re: The discoverer of diatoms was identified

This was a very interesting read! Thank you for posting. Amazing how much drama these discoveries caused at the time. I love how he in 1703 described Paramecium with it's "little feet" and and "are perpetually beating about like a Spaniel in a Field". "Those Animalculi marked F. are also plentiful i...
by hkv
Thu Apr 09, 2020 3:46 pm
Forum: Pictures and Videos
Topic: Stigonema Mammilosum
Replies: 8
Views: 495

Re: Stigonema Mammilosum

Thanks all! It is truly an interesting species but difficult to culture. I have them in a petri dish, but they are not growing at the moment. Also have a batch in culture growth media with very limited growth. Trying to make a few more strands to photograph. Will try using an oil objective. These ve...
by hkv
Wed Apr 08, 2020 6:25 pm
Forum: Pictures and Videos
Topic: A new film on a Stentor.
Replies: 4
Views: 224

Re: A new film on a Stentor.

Great effect! Almost DIC-like!
by hkv
Wed Apr 08, 2020 11:34 am
Forum: Pictures and Videos
Topic: Stigonema Mammilosum
Replies: 8
Views: 495

Stigonema Mammilosum

This photograph shows a beautiful (and relatively large) terrestrial cyanobacteria often found growing on rocks. Stigonema Mammilosum is a short branching species that can be found as blackish crusts and biofilms on inselbergs (isolated rock hill, knob or ridge) in many places on earth. Alexander vo...
by hkv
Wed Apr 08, 2020 11:02 am
Forum: Microscopes and optics
Topic: Olympus U-AN360-3
Replies: 2
Views: 255

Re: Olympus U-AN360-3

I can send close-up pictures of all sides of it, but perhaps not the inside. I don't want to take it apart.
by hkv
Tue Apr 07, 2020 2:33 pm
Forum: Pictures and Videos
Topic: Swamps come alive.
Replies: 11
Views: 566

Re: Swamps come alive.

What is the scale of each of the "vases" in Dinobryon. The vase shaped sections in the samples I collected are about 20 microns in length. I observed no internal structures, except what I observed below. In pictures, # 4, #5' where a vase structure contains large inclusions, they appear to be singl...
by hkv
Tue Apr 07, 2020 12:52 pm
Forum: Pictures and Videos
Topic: Swamps come alive.
Replies: 11
Views: 566

Re: Swamps come alive.

Always nice when the ponds starts to come back to life! The vase shaped organism is likely a golden algae called Dinobryon.

Image



Golden Algae - Dinobryon
by Håkan Kvarnström, on Flickr
by hkv
Sun Mar 22, 2020 10:32 pm
Forum: Pictures and Videos
Topic: Trachyneis aspera (another)
Replies: 17
Views: 2046

Re: Trachyneis aspera (another)

Beautiful!
by hkv
Sun Feb 09, 2020 1:49 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 4716

Re: Micrographs in Black & White

Thoughtful and profound microscopy observations with your B/W image captures spark my my reaction, thank you hkv. It has always given me pause at how with 'blasts of transmitted illumination'...a sample wet mount slide prep is oh so unnaturally visualized. I toyed with 'night vision' device to see ...
by hkv
Thu Feb 06, 2020 7:23 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 4716

Re: Micrographs in Black & White

Quite interesting: Botryococcus has a lot of potential as a source for renewable energy as it produces a lot of hydrocarbons: https://de.wikipedia.org/wiki/Botryococcus_braunii You have made this visible in a beautiful way, Håkan! Bob Yes, the algae have been used for biofuel production. I wrote th...
by hkv
Thu Feb 06, 2020 7:20 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 4716

Re: Micrographs in Black & White

hb2sbdb wrote:
Thu Feb 06, 2020 12:05 am
amazing! very arfull images. I could make poster out from any of them and hang in my living room (well, maybe except the nematode one :)
Ha ha, yes teh nematode may scare a few people.
by hkv
Tue Feb 04, 2020 10:03 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 4716

Re: Micrographs in Black & White

MicroBob wrote:
Tue Feb 04, 2020 5:25 pm
Isn't it the Botryococus that has oil drops at it's edges?
Yes, yes, I wrote the wrong name. Sorry!
by hkv
Mon Feb 03, 2020 10:07 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 4716

Re: Micrographs in Black & White

Thanks all! Great to get feedback and I agree about the geometric shapes. MicroBob, I also like those two, but also Gloeotricha with the oil-drops around the edge.
by hkv
Mon Feb 03, 2020 10:03 pm
Forum: My microscope
Topic: Olympus BX60F
Replies: 22
Views: 8037

Re: Olympus BX60F

Yes, unfortunately, DIC is not cheap. For some reason the prices refuse to drop on ebay. Used Olympus (BX) equipment are almost more expensive nowadays than they were 3-4 years ago.

/Håkan
by hkv
Sun Feb 02, 2020 9:25 pm
Forum: My microscope
Topic: Olympus BX60F
Replies: 22
Views: 8037

Re: Olympus BX60F

I currently have phase, fluorescent, and dark-field capability but was wondering if anyone familiar with the BX series can tell me what I will need to take advantage of DIC on my particular setup. You need DIC prisms in the condenser. The condensers that take prisms are U-UCD8 and U-UCDB. DIC can b...
by hkv
Sun Feb 02, 2020 7:18 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 4716

Micrographs in Black & White

Hi folks, I have been experimenting with black and white micrographs for a change. I think it gives a different feeling and interesting contrast. Been trying BF, DF, DIC, POL and FLUO to see the difference. The First image is a colonial cyanobacteria (Gloeotrichia) in brightfield. The second image i...
by hkv
Fri Sep 13, 2019 9:17 am
Forum: Pictures and Videos
Topic: Rotifer and some algae
Replies: 12
Views: 2038

Re: Rotifer and some algae

viktor j nilsson wrote:
Thu Sep 05, 2019 8:14 pm
Hej Håkan,
I've admired your work for quite some time. Good to see you post on here as well! Amazing and inspiring photos as always.

Viktor, in Lund
Thanks Viktor! Good to see a Swedish microscope fellow on here. Not many in Sweden that I am aware of with this hobby.
by hkv
Thu Sep 05, 2019 7:32 pm
Forum: Pictures and Videos
Topic: Rotifer and some algae
Replies: 12
Views: 2038

Re: Rotifer and some algae

Wow these are really good!! Especially the last one. I'd be very interested to hear about your setup with the hope of improving my own technique. Cheers! Wes Hi, the setup was a BX51 with a UplanSAPO 60XW (Water immersion) for the first and last image. The rotifer was shot using the UplanSAPO20X. D...
by hkv
Thu Sep 05, 2019 6:50 am
Forum: Pictures and Videos
Topic: Rotifer and some algae
Replies: 12
Views: 2038

Re: Rotifer and some algae

Wonderful images hkv. Thanks for sharing. I'm intrigued by the rotifer image in that, despite stacking and stitching, there is very little evidence of movement. Is there a secret you're willing to share?? Tom W. Thank you! Well, the body was still, but the head moved. Therefore the head is barely v...
by hkv
Wed Sep 04, 2019 10:18 pm
Forum: Pictures and Videos
Topic: Rotifer and some algae
Replies: 12
Views: 2038

Rotifer and some algae

Hi there, been lurking around here but not posted for some time. I thought I would share a few of my recent images with you. Not much time to photograph anymore, but was out sampling a local lake recently and managed to get a few samples. First time I manage to get Botryococcus! I remember 75RR had ...
by hkv
Sat Jun 29, 2019 10:25 am
Forum: Sandbox
Topic: Testing DropBox for image sharing
Replies: 8
Views: 4325

Re: Testing DropBox for image sharing

If you alter the link a bit and use the server name "dl.dropboxusercontent" you will be able to display the image without users having to click on the link. It will be embedded in the post. Just a tip. Here is your link with the server name altered. Also remember to enclose the link with brackets ht...
by hkv
Sat Nov 24, 2018 9:44 pm
Forum: Pictures and Videos
Topic: Assorted Marine Diatoms
Replies: 6
Views: 1477

Re: Assorted Marine Diatoms

Beautiful!
by hkv
Fri Nov 23, 2018 8:38 pm
Forum: Introduce yourself
Topic: Photomicrographer - Hello from Calgary, Alberta
Replies: 8
Views: 3067

Re: Photomicrographer - Hello from Calgary, Alberta

Wow! What a lab! Would be nice to visit someday!
by hkv
Fri Nov 23, 2018 8:37 pm
Forum: Pictures and Videos
Topic: Cyanobacteria - Gloeotrichia
Replies: 17
Views: 4043

Re: Cyanobacteria - Gloeotrichia

Thanks! I appreciate your feedback!
by hkv
Fri Nov 23, 2018 8:34 pm
Forum: Pictures and Videos
Topic: Miscellaneous Photomicrographs
Replies: 13
Views: 2162

Re: Miscellaneous Photomicrographs

Excellent images! Professional quality indeed! I like them very much!
by hkv
Fri Nov 23, 2018 8:32 pm
Forum: Pictures and Videos
Topic: Moss Dissection
Replies: 33
Views: 4602

Re: Moss Dissection

Cool! Very interesting to see!
by hkv
Tue Oct 30, 2018 9:04 am
Forum: Pictures and Videos
Topic: Cyanobacteria - Gloeotrichia
Replies: 17
Views: 4043

Re: Cyanobacteria - Gloeotrichia

Hi Håkan, really great images! Every time I see how beautiful and detailed nature is it becomes more and more difficult to understand how badly we treat it. It's nice of you to decribe the amount of work and capability that was neede to make these images. So we are not disappointed when we can't ge...
by hkv
Tue Oct 30, 2018 8:55 am
Forum: Pictures and Videos
Topic: Wetland Cillates
Replies: 13
Views: 2302

Re: Wetland Cillates

Thanks Bob, What you say has just made me think. So does a larger drop of water create a larger space between the slide and the coverslip? Within reason. :) Yes, for sure. Large drop, large gap. The surface tension of the water lifts the glass sort of. I use Microbobs method as well. Add water with...
by hkv
Tue Oct 30, 2018 8:44 am
Forum: Pictures and Videos
Topic: Diatoms
Replies: 6
Views: 1498

Re: Diatoms

Your DIC images are great again! Where in Sweden do you live? I was twice paddling in vintage folding kayaks in the area south on Västervik with my family. It was very impressiv to move between these many small uninhabited islands and then stay the night in tiny tents on one of them. I live in Stoc...