Search found 7900 matches

by 75RR
Fri Nov 06, 2015 9:08 pm
Forum: Resources (online, books etc.)
Topic: Xylem Database
Replies: 4
Views: 2494

Xylem Database

This is an amazing site. A must for those of you who own a Microtome, yet still worth a visit for those of you who do not.

http://www.wsl.ch/dendropro/xylemdb/ind ... D=52&MOD=1
by 75RR
Fri Nov 06, 2015 8:22 pm
Forum: Pictures and Videos
Topic: Amoeba Test
Replies: 12
Views: 2353

Re: Amoeba Test

Does,nt image stacking require orientation of a subject to 'best glean info from image stacking?'
In an ideal world, yes. In practice we take what we get. :)
Given the size and shape of the object and the objective used, a single image would have been less representative.
by 75RR
Fri Nov 06, 2015 6:50 pm
Forum: Microscopes and optics
Topic: Useless eyepiece?
Replies: 19
Views: 6155

Re: Useless eyepiece?

Galvanic corrosion?
by 75RR
Fri Nov 06, 2015 6:37 pm
Forum: Identification help
Topic: Yellow globules in Ostracod
Replies: 13
Views: 3984

Re: Yellow globules in Ostracod

...often small oil droplets coalesce to larger drops...
Interesting, will keep an eye out to find out if they are "normally" visible. Unfortunately only trapped Ostracods can be observed with any detail. Chicken and egg?
by 75RR
Fri Nov 06, 2015 12:52 pm
Forum: For forum members who want to buy and sell equipment
Topic: Series 15 binocular AO Spencer
Replies: 2
Views: 1472

Re: Series 15 binocular AO Spencer

Have you considered getting a Zeiss Standard stand to go with the Zeiss eyepieces and objectives?
It is a modular system that you can upgrade to your hearts content.
by 75RR
Fri Nov 06, 2015 3:07 am
Forum: Pictures and Videos
Topic: Spiders (series)
Replies: 7
Views: 1652

Re: Spiders (series)

Fun effects
PACO was: polarizer (up top in the head); in the condenser: dark field, interference, polarizer, interference, and the entire thing was skewed to create a fake oblique field.
That is going to be fun to reproduce.
by 75RR
Fri Nov 06, 2015 3:00 am
Forum: Pictures and Videos
Topic: Xylem
Replies: 10
Views: 2178

Re: Xylem

25x * 1.25, Oblique + Pol

Image

Not sure of this ID, possibly Emilia sp. Flower is pink, stem is quite woody.
Image
by 75RR
Fri Nov 06, 2015 2:24 am
Forum: Identification help
Topic: Yellow globules in Ostracod
Replies: 13
Views: 3984

Re: Yellow globules in Ostracod

I recorded similar-looking orange/yellow lipid droplets in an Aelosoma worm as well ... Thought those were just characteristic colour spots of the Aeolosoma sp. , though on your video they do look more like globules. Perhaps it is a bit of both? https://www.youtube.com/watch?v=HaW8u5ZpfiA http://i1...
by 75RR
Fri Nov 06, 2015 1:04 am
Forum: Identification help
Topic: Yellow globules in Ostracod
Replies: 13
Views: 3984

Re: Yellow globules in Ostracod

I'll put my dime on lipids. Thanks for the tip! Found this: Abstract: A detailed study of the lipids of selected zooplankton species and scavenging amphipods in the near-bottom water layer (15-100 m above bottom, mab) was carried out at the BENGAL site in late summer 1998. Copepoda were the main co...
by 75RR
Thu Nov 05, 2015 11:11 pm
Forum: My microscope
Topic: Olympus E (Phase Contrast, Oil Darkfield, Plan Brightfield) + AO20 (Oil Darkfield)
Replies: 7
Views: 2945

Re: Olympus E (Phase Contrast, Oil Darkfield, Plan Brightfield) + AO20 (Oil Darkfield)

Just downloaded the manual for the AO 20 - I must say that is a very nice microscope.
Congratulations again.
by 75RR
Thu Nov 05, 2015 10:27 pm
Forum: My microscope
Topic: Olympus E (Phase Contrast, Oil Darkfield, Plan Brightfield) + AO20 (Oil Darkfield)
Replies: 7
Views: 2945

Re: Olympus E (Phase Contrast, Oil Darkfield, Plan Brightfield) + AO20 (Oil Darkfield)

Congratulations. They both look very nice.
That 100w illuminator is a nice touch.
Agree that one compound microscope is enough if you are not into collecting.
by 75RR
Thu Nov 05, 2015 10:17 pm
Forum: Pictures and Videos
Topic: Xylem
Replies: 10
Views: 2178

Re: Xylem

Nice 3D effect
Looked up Iberis sempervirens, typed xylem next to it on a whim and came up with a xylem database! Who knew?
This could get addictive.

http://www.wsl.ch/dendropro/xylemdb/ind ... D=52&MOD=1
by 75RR
Thu Nov 05, 2015 10:06 pm
Forum: Identification help
Topic: Yellow globules in Ostracod
Replies: 13
Views: 3984

Yellow globules in Ostracod

Anyone know what the yellow globules are?

Image
by 75RR
Thu Nov 05, 2015 9:33 pm
Forum: Identification help
Topic: Blood Smear Identification Help
Replies: 9
Views: 3712

Re: Blood Smear Identification Help

Link to a thread about texts on haematology and pathology: viewtopic.php?f=15&t=1510&p=11483&hilit=blood#p11483
by 75RR
Thu Nov 05, 2015 5:33 pm
Forum: My microscope
Topic: Everymans's Microscope
Replies: 7
Views: 3180

Re: Everymans's Microscope

Hi DaveH, are you using a phone to take these photographs? Can you improve them?
Perhaps some post image processing would help. I am sure the microscope is nicer than it appears!

Interesting article and idea. Should still be relevant today.
by 75RR
Thu Nov 05, 2015 12:06 pm
Forum: My microscope
Topic: Budget Scope
Replies: 2
Views: 2031

Re: Budget Scope

Congratulations. There is a lot to be said in favor of a economical starter microscope. Firstly it allows you to dip a toe in the water without breaking the bank, but perhaps more importantly it will allow you to develop skills that you will need to make the most of a more advanced future microscope...
by 75RR
Thu Nov 05, 2015 11:27 am
Forum: Pictures and Videos
Topic: Lepadella II
Replies: 6
Views: 1648

Re: Lepadella II

Many thanks gekko and einman.
Good shots! Trying tasing it
Surely you mean use a Phaser ;)
by 75RR
Thu Nov 05, 2015 11:23 am
Forum: Pictures and Videos
Topic: cristallisation de sel
Replies: 4
Views: 1009

Re: cristallisation de sel

Nice. Especially like the first and last ones.
by 75RR
Thu Nov 05, 2015 11:20 am
Forum: Pictures and Videos
Topic: Daucus carota sativus aka Plan B
Replies: 7
Views: 1526

Re: Daucus carota sativus aka Plan B

Thanks JimT, DaveH and vassell.

Anyone have any images of phloem?
by 75RR
Thu Nov 05, 2015 11:09 am
Forum: Pictures and Videos
Topic: calothrix (cyanobacteria)
Replies: 6
Views: 1543

Re: calothrix (cyanobacteria)

Thanks gekko and vassell
I live in the Finger Lakes area of NY USA
Looked it up. Very pretty area!
by 75RR
Thu Nov 05, 2015 10:57 am
Forum: Pictures and Videos
Topic: Amoeba Test
Replies: 12
Views: 2353

Re: Amoeba Test

Hi charlie g, not too sure what you are asking. First image consists of a 12 image stack and shows the Object in its entirety. Second image (top right) shows the back part (rear) of the Object, it consists of the last 4 images of the 12 image stack. If you look through the aperture of the first imag...
by 75RR
Wed Nov 04, 2015 9:54 pm
Forum: Pictures and Videos
Topic: Daucus carota sativus aka Plan B
Replies: 7
Views: 1526

Re: Daucus carota sativus aka Plan B

Thanks JimT and DaveH

I believe the "tower like looking things" are xylems.
If the cut had been cleaner it would look a lot flatter. ;)
by 75RR
Wed Nov 04, 2015 8:03 pm
Forum: Pictures and Videos
Topic: Daucus carota sativus aka Plan B
Replies: 7
Views: 1526

Daucus carota sativus aka Plan B

6.3x and 16x, 8 and 21 image stacks in Photoshop. Encouraged by JimT's Hydranges, I decided to dig out my home made Microtome (a nut, a washer and a screw) and try my hand again at sectioning with a scalpel. I had forgotten how difficult it was. Gave up on the nettle after a several discouraging tri...
by 75RR
Wed Nov 04, 2015 10:55 am
Forum: Microscopes and optics
Topic: Useless eyepiece?
Replies: 19
Views: 6155

Re: Useless eyepiece?

There is a formula (well a rule of thumb really) to calculate this: Range of Useful Magnification (500-1000 x NA of Objective) In which the 500 x NA (Numerical Aperture) is the minimum necessary for the detail present in an image to be resolved, and anything over 1000 x NA gives empty magnification....
by 75RR
Wed Nov 04, 2015 4:41 am
Forum: Introduce yourself
Topic: Introduction & sanity check
Replies: 20
Views: 6334

Re: Introduction & sanity check

Hi Dale, If your 40x objective has an NA of 0,65 (that is the minimum I think) then the max magnification would be 650x If you multiply 20x eyepieces by the 40x objective you get 800x, well into empty magnification. If you divide the max magnification by the objective, in this case 650/40, you get a...
by 75RR
Wed Nov 04, 2015 3:09 am
Forum: Pictures and Videos
Topic: Amoeba Test
Replies: 12
Views: 2353

Re: Amoeba Test

Thanks JimT. Agree, a bit small for Arcella - still, I think it may be a Amoeba Test, of one kind or another.
by 75RR
Wed Nov 04, 2015 3:02 am
Forum: Pictures and Videos
Topic: calothrix (cyanobacteria)
Replies: 6
Views: 1543

Re: calothrix (cyanobacteria)

Thanks JimT,
They used to be known as blue-green algae, now reclassified as Cyanobacteria. Hence the funny shape.
by 75RR
Wed Nov 04, 2015 2:58 am
Forum: Pictures and Videos
Topic: Hydra revisited
Replies: 13
Views: 3194

Re: Hydra revisited

Nice to see close ups. 100x has scary working distance!

So what was the problem with the P.A.C.O. that you had to grind it? It looks like a simple foolproof design.
by 75RR
Wed Nov 04, 2015 1:20 am
Forum: Introduce yourself
Topic: Introduction & sanity check
Replies: 20
Views: 6334

Re: Introduction & sanity check

Hi Dale, there is a formula (well a rule of thumb really) to calculate this: Range of Useful Magnification (500-1000 x NA of Objective) in which the 500 x NA (Numerical Aperture) is the minimum necessary for the detail present in an image to be resolved, and anything over 1000 x NA gives empty magni...
by 75RR
Tue Nov 03, 2015 11:05 pm
Forum: Pictures and Videos
Topic: Amoeba Test
Replies: 12
Views: 2353

Re: Amoeba Test

But where did you find it. The site might give a clue.
Old sample jar with faded label. I suppose it will remain with a question mark over it.