About Me

My name is Chris, and I am an undergraduate student at Humboldt State University, Arcata, CA, USA, with major coursework in botany, and minor coursework in chemistry.
Electron microscopy, and micrography in general, is a passion of mine, nearly an obsession.
This blog represents scanning and transmission electron micrographs from over two years of independent undergraduate microscopy research.
My purpose in making this blog is to act as a research tool for ultrastructural analysis. My hope is that everyone that needs microscopic insights into their research can find micrographs that help them understand, like a free, online, universal ultrastructure atlas.
I don't make micrographs that help everybody, but they can help somebody, if you research fungi, oomycetes, plants, or lichens. This would be one facet of the vision of online, easily accessible ultrastructure atlases. It would be up to the rest of you to fill in where I leave off.
You can use/publish/whatever these images, all I ask is that you ask my permission, and tell me what you plant to do with the images. That is a humble request, I believe.

Comments

Post a Comment

Popular posts from this blog

Devonian progymnosperm wood charcoal from Cottonwood Canyon, Wyoming

Image
Charcoal collected by Mihai Tomescu along the Souris river at Cottonwood Canyon, Wyoming, USA in 2017 showing diagnostic features typical of progymnosperm wood: clustered pits in the tracheids. Notice how the pits are closely clustered, and the tracheids are smooth between the pit clusters. This compression was collected from Devonian sediments roughly 400 million years old, give or take 20 million years. No chemical fixation. Sputter coated in gold about 320 atoms thick. Working distance 25.5 mm, backscatter electron detector, accelerating voltage 30 kV, spot size 4.0, scale bar 50 µm, magnification 1,250X, Quanta 250 electron microscope.
Read more

Peltigera membranacea cryofracture highlighting its tissue structure

Image
Peltigera membranacea  lichen thallus cryofracture highlighting the organization of distinct tissue layers within heteromerous lichens. At the top of the image is the ventral surface of the lichen showing the thick and loose hyphae of the medulla, and an absence of a lower cortex; a diagnostic character for the  Peltigera genus. The lower right corner of thge image shows the top surface of the epidermis layer covered in a waxy, hydrophobic coating. The dense layer between the epidermis and the emdulla is the photobiont layer, where colonies of tiny cyanobacterial Nostoc  photosymbionts reside within a gelatinous carbohydrate matrix. Tissue fixed in 1.5% glutaraldehyde in cacodylate buffer and osmium tetraoxide, dehydration series in ethanol, cryofractured in liquid nitrogen, critical-point dried, and sputter coated in gold about 320 atoms thick. Imaged using Quanta 250 scanning electron microscope, working distance 18.7 mm, secondary electron detector, accelerating volt...
Read more

Phytophthora cinnamomi germinating on a Port Orford Cedar leaf

Image
Leaf of Chamaecyparis lawsoniana, Port Orford cedar, baited with Phytophthora cinnamomi,  causal agent of 'phytophthora dieback', showing a clump of agar, emerging hyphae, and scattered bacteria. Leaf was sourced from HSU campus, and P. cinnamomi  was sourced from Chris Lee's personal culture collection, and incubated together in soil suspension for one week. Leaves were fixed in 1.5% glutaraldehyde in 50 µM cacodylate buffer and osmium tetraoxide, dehydrated in serial dilutions of 100% ethanol, and critical-point dried. Sputter coated in gold about 320 atoms thick. Imaged using Quanta 250 scanning electron microscope, working distance 13.9 mm, backscatter electron detector, 30 kV accelerating voltage, spot size 3.0, 300X magnification.
Read more