Nice SEMs

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,773
Reaction score
1,880
Location
Gainesville, GA
Kat, do you know the magnification levels on the radula and suckers? Seeing the "plunger" effect more or less as a functional sequence is neat. Any more "how it works" pictures?
 
Joined
Sep 16, 2005
Messages
4,936
Reaction score
255
Location
Pittsburgh, PA
D,

In the pictures there is a measurement bar in microns. A micron is 1000th of a millimeter. Does this help? In the top left picture of the radula, the bar is 200 microns - that is about the width of three of the middle teeth, so the width of three of the middle teeth would be 0.2 millimeters. On the bottom left image of the hooks, the width is 1 millimeter, so the total length of that hook would be about 1.5 millimeters.
 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,773
Reaction score
1,880
Location
Gainesville, GA
A little after I enlarged the photos to read them but I am afraid I don't get the spacial feel for how many times reality I am looking at when somthing is stated that way. If the bar in the key is 200 x .001 or .2 mm I can look at a tape and guestimate 1/5 th of a mm but that does not help me visuallize the magnification level - just did not do bio in college (night classes meant astromomy even though I wanted to take biology) and have not even toyed with a microscope since I was a kid.
 
Joined
Sep 16, 2005
Messages
4,936
Reaction score
255
Location
Pittsburgh, PA
In the first photo of the radula, it says 1600x magnified, but that is not taking into account the size of the image that you are viewing. If you enlarge the photos, then you are magnifying it even further. Are you confused yet?
 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,773
Reaction score
1,880
Location
Gainesville, GA
It does help a lot with spacial imagery to know the magnification. I can't tell the actual size of what I am looking at but I can get prospective. If you magnify your thumb 1600 X's you can see finer details so it is the amount of detail with relation to normal viewing that knowing the magnification level helps intuitively understand.

Hey, I still prefer an analog clock because I can see how late I am :roll: because it displays a picture of an hour's worth of time and the relationship of the current time and when I was supposed to be somewhere. :old:
 

Tintenfisch

Architeuthis
Staff member
Moderator
Joined
Nov 19, 2002
Messages
2,102
Reaction score
203
cuttlegirl;136281 said:
Yeah, it is hard to stop breathing while mounting specimens for SEM...
Yeah... don't breathe, don't sneeze (almost as difficult for me as not breathing for most people :roll:), don't drop it onto the sticky surface upside down, don't squeeze too hard otherwise you get tweezer-marks, don't let your hands shake... actually it's a wonder I got any of these pics at all. :roll:

Here are some more. These are tentacle clubs of paralarval onychoteuthids. Sorry that some have mags on them and some don't - I usually don't include them in the legend because journals don't want them, due to image resizing changing the mag. Scale bars are much preferred even if they make visualization a little harder for some.
 

Attachments

Tintenfisch

Architeuthis
Staff member
Moderator
Joined
Nov 19, 2002
Messages
2,102
Reaction score
203
And here are some 'how it works' photos, kind of.

1 - a normal adult arm sucker in Onychoteuthis
2 - a tentacular sucker in the middle of developing into a hook, in paralarval Onychoteuthis
3 - the 'back' (interior/aboral side) of an exposed paralarval tentacular sucker ring - the smooth rounded part in the foreground would normally be set into the sucker musculature
4 - a tentacular sucker in the middle of developing into a hook, in paralarval Onykia
 

Attachments

Members online

Latest Posts

Forum statistics

Threads
20,425
Messages
205,195
Members
8,472
Latest member
sumit

Monty Awards

TONMOCON IV (2011): Terri
TONMOCON V (2013): Jean
TONMOCON VI (2015): Taollan
TONMOCON VII (2018): ekocak

Top