Many of you may remember that about a year ago the
RII Imaging Cores - Optical
hosted four different vendor’s on-site microscope demonstrations (Aug & Sept 2022,
Microscopy Month
). We used the information gathered from those demonstrations to successfully submit an internal
Equipment Enhancement Fund
proposal for this microscope (
TRIF
funds). Additional funds to complete the purchase came from the RII Core Facilities department budget.
Our goal was to have a microscope that could give confocal-like images of thinner samples that would be available at our Life Sciences North location on the UA Health Sciences campus.
Who would benefit?
Users with samples such as cells on a coverslip, paraffin sections or standard frozen sections up to approximately 20um in thickness.
The Apotome only works on fluorescent samples. The structured illumination used can provide confocal-like images and z-stacks.
Users doing large area stitching of fluorescent samples will find this instrument to be faster than any of the other instruments in our core. Adding in the ability to capture z-stacks will be of benefit as well.
For users wanting to add a near-IR fluorophore to their staining, this instrument can capture those wavelengths (in widefield mode only, no Apotome).
The AI sample finder may be useful to labs with small un-stained samples that are hard to locate, with multiple sections on a slide that all need to be tile-scanned, and for imaging multiwell plates.
People stitching standard histology slides should see a speed improvement and the AI sample finder can speed up the setup for tile scanning.
The LED fluorescence illuminator offers some options for ex/em wavelengths that the Leica microscope is not as well suited for.
The Axio Observer’s filters/excitation wavelengths can be seen on this FPbase webpage
.
Weaknesses:
The ZEN Blue software has quite a large number of options. This instrument might not be an appropriate starting point for a brand new
“I’ve never used a high-end research microscope”
user.
Low contrast and/or dim fluorescent samples don’t work any better on the Apotome than they do on a standard confocal.
Images acquired with the Apotome can be post-processed by software deconvolution and there is a noticeable improvement, with the caveat that not all samples will benefit from post-processing.
This is a filter-based fluorescence microscope, so there may be instances where the spectral nature of the Marley point-scanning confocal would give better images.
Because this instrument uses multi-band fluorescence filters, there may be some spectral bleedthrough that would be problematic for some research uses.
Because the microscope’s objective nosepiece is already full, the 40X dry or the 100x oil objective are only available on request (in advance).
New user training will begin mid-August. If the interest is high, it may take some time for everyone to get trained.
The hourly rate for trained users is $25/hr. Contact Doug Cromey to arrange for user training ($82/hr, 2-3 sessions). The
Axio Observer 7’s specifications
.
We respectfully acknowledge the University of Arizona is on the land and territories of Indigenous peoples. Today, Arizona is home to 22 federally recognized tribes, with Tucson being home to the O’odham and the Yaqui. Committed to diversity and inclusion, the University strives to build sustainable relationships with sovereign Native Nations and Indigenous communities through education offerings, partnerships, and community service.
Questions?
Contact us.
