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#fluorescence
conspectusargosy · 3 months
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Pine tree and lichen landscape in the Sierra Nevada mountain range, photographed with UVIVF.
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markscherz · 6 months
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Don’t Brachycephalus ‘pumpkin toadlets’ also have bones that glow under UV? and can’t hear their own calls?
Well yes but so do you. All bones fluoresce under UV. But Brachycephalus, sometimes called ‘saddleback toads’ (though they are not true toads), have a large bony structure dorsally that fluoresces through the thin layer of skin when exposed to a strong UV source.
Indeed, they allegedly cannot hear their own calls. But this is paradoxical, because calling is extremely energetically costly, and it is not clear why animals would evolve to continue to call if the call is falling on deaf ears. Currently advanced hypotheses are very unsatisfactory imho, so I rather think that we are missing a key part of the puzzle.
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fungusqueen · 9 months
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UV reactive Cortinarius sp. from 2019. We tried to identify it but I'm not sure if we correctly identified it or if we ever will. I think the future of mycology texts is to include more notes on UV reactivity/fluorescence, which will definitely help!
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Bright and tough: A material that heals itself and glows
A research team at the RIKEN Center for Sustainable Resource Science (CSRS) has succeeded in developing a self-healing material that is also capable of emitting a high amount of fluorescence when absorbing light. The research, published in the Journal of the American Chemical Society, could lead the way to the creation of new materials such as organic solar cells that are more durable than current types. In 2019, Zhaomin Hou and his team at RIKEN CSRS successfully copolymerized ethylene and anisylpropylene using a rare-earth metal catalyst. The resulting binary copolymer displayed remarkable self-healing properties against damage. The copolymer's soft components, alternating units of ethylene and anisylpropylene, coupled with hard crystalline units of ethylene-ethylene chains, acted as physical cross-linking points, forming a nano-phase-separated structure that proved crucial for self-healing. Building upon this success, they incorporated a luminescent unit, styrylpyrene, into a monomer and then formed polymers that also included anisylpropylene and ethylene. This process led to the synthesis, in a single step, of a self-healing material with fluorescence characteristics.
Read more.
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oldearthminerals · 6 months
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Chalcopyrite with Fluorescent Calcite from Trepca Mine Complex, Kosovo. $45 plus shipping.
https://www.oldearthminerals.com/shop/p/chalcopyrite-with-fluorescent-calcite-and-chalcedony-3ww85
#chalcopyrite #fluorescentminerals #calcite #mineralspecimen #mineralporn #crystalporn #crystalhealing mineralsofig
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eduardo- · 5 months
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Did you know that common garden snails glow when you shine the right kind of light on them? This is a process known as biofluorescence, the production of fluorescence by living things.
In this case, the snail was illuminated by a heavily filtered UV flashlight. The shell goes a creamy peach, and the flesh goes vibrant Hulk green.
Fun fact: their slime is also green!
Nature is pretty cool.
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nailsandinspo · 1 month
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briargeese · 3 months
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I got a lapis lazuli bowl to give as a Christmas present and looked at it under the UV light! What a treat.
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miss-biophys · 2 months
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New publication out!
We were curious what happens with the lipid membrane if proteins are inside. As a model of membrane proteins we use transmembrane peptides with neutral and positive charge. The charges turn out to be quite crucial in the peptides influence on the lipids.
publication link: https://doi.org/10.1016/j.colsurfb.2024.113765…
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All transmembrane peptides hinder mobility of lipids around. The positive charges in the peptide make this hindering a long range influence.
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The membrane with the positive peptides then has heterogeneities in the lipid mobility. This hampers free rearrangement of lipids and leads to lower ability to seal ruptures. You can see below how the membrane stays fragmented after indentations with AFM (atomic force microscope), which is basically a very tiny tip that scans the surface of the membrane for images and can also push through it to test mechanical stability.
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For comparison this is how it looks like with a membrane without any peptides. The mebrane seals the ruptures induced by the AFM tip and recovers its round shape. The same happens if we have a neutral, non-charged, peptide.
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With this work we highlight the importance of including charges of proteins and peptides in membrane model studies.
And last but not least...
This is the very first time I am the last corresponding author of a publication. I am immensely proud on myself!
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How’s Phosphor the axolotl?
He's doing really well so far, I believe!
Phosphor has gotten a special place above my desk in a big aquarium.
It may or may not be decorated with stuff related to chemistry ~
He says hello:
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You must have been aware that Phosphor is a mutated axolotl - a GFP axolotl?
GFP Axolotls were "created" in order to study the evolution of cancer-related genes. The mutation has now developed into a dominant trait that is carried by generations!
The GFP gene causes many axolotl molecules to generate a shiny-colored enzyme inside one type of jellyfish. It also provides a brilliant fluorescent green look to the skin of GFP variants when exposed to UV rays. The most amusing aspect is that any axolotl mutation may transform into a GFP mutation. As a result, it is considered that the axolotls that can contain the GFP genetics are quite unique!
Thank you, anon! ✨️
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conspectusargosy · 6 months
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Salvia mellifera, black sage, is a perennial shrub in the mint/sage family native from central California down through the top of Baja California. It is part of the cast of plants present in coastal sage and chaparral habitat, thriving only in a specific range of rainfall in a mediterranean climate. The flowers host a variety of pollinators including butterflies, hummingbirds, and native bees and its seeds, like other Salvia species, are abundant and provide food for animals and birds. The fragrant leaves contain chemicals used by the Chumash to treat pain and a unique spicy honey is derived from the plant in the modern day.
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teachersource · 11 months
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Did you know? Platypuses Fluoresce Under UV Light! Their dense fur protects them in cold water and normally appears to be brown. However, under a black light (ultraviolet light) it glows teal. Unlike the presence of venom, which only the males have, all platypuses possess this biofluorescence. This was only just discovered in 2020. They are one of just a few mammal species known to have this trait.
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chimerical-creations · 5 months
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Glitter jar featuring the skull emblem thing plus spiky vine frame from Mystery Skulls Animated. Skull logo was sandblasted into the outer surface, then the jar was filled with pink glitter and glow powder and mineral oil, and the lid glued on.
Dimensions: Approximately 6cm tall and 3cm in diameter.
[Video description: Small glass jar with white plastic screw-top lid, held between thumb and index finger. Size of jar is approximately 6cm total height and 3cm in diameter. The outer surface is sandblasted with the Mystery Skulls Animated skull emblem surrounded by spiky vines forming a vaguely triangular shape around the skull. The jar is filled with a mix of pink glitter and glow powder suspended in clear mineral oil.
The first ten seconds of video is a turnaround of the jar, showing off the sandblasted design. The glitter and glow powder has settled to the bottom of the jar.
Second part of the video shows the jar being flipped and twisted around to get the the glitter and glow powder moving. At first the glitter falls very slowly, then picks up speed as larger globs begin to fall, until the whole mass breaks away from the base of the jar in a shimmery cascade. The jar is spun around a few more times to show off the swirling insides from multiple angles.
The last forty-five seconds of video show the same twirling-about thing but under UV light, to show off how brightly the pink glow powder fluoresces. End description.]
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A Soap Bubble Becomes a Laser
Using a soap bubble, researchers have created a laser that could act as a sensitive sensor for environmental parameters including atmospheric pressure. [...] Soap bubbles are known for their attention-grabbing effect on toddlers, and now researchers have shown that these objects have another dazzling use—generating color-tunable laser light [1]. They demonstrated that a dye dissolved in the soap solution of such a bubble can amplify light circulating in the spherical shell and produce laser light. This light is visible as a glowing ring around the bubble. Such “bubble lasers” could act as precision sensors for measuring atmospheric pressure or for detecting changes in an electric field.
Read more.
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oldearthminerals · 7 months
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Fluorescent Calcite & Chalcopyrite from Trepca Mine Complex, Mitrovica, Kosovo $85 plus shipping.
https://www.oldearthminerals.com/shop/p/chalcopyrite-with-fluorescent-calcite-and-chalcedony-3ww85-yew34
#chalcopyrite #manganocalcite #calcite #fluorescentminerals #crystalcluster #crystalporn #mineralporn #mineralspecimen
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starminesister · 2 years
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Picked up this weekend (part 3 of 3, and I definitely saved the best for last): A large uranium glass Tiffin satin-finish lotus serving bowl & matching platter; and 3 bowls with matching saucers. The fact that the pics had to be taken on my bathroom counter (for light blockage purposes) should indicate the size of the dishes. I had been eyeing them at a local thrift store for almost a month and a half and finally this weekend their perpetually rotating tag-color sale was on the same color these had been labelled with, so I got them for half off the original asking price. Basically, all these dishes cost me $60 USD.
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