Black History Month, Public Health Edition
Alma Levant Hayden became one of the first black American scientists at NIH, and later the FDA. Her research focused on spectrophotometry, and she was instrumental in proving the ineffectiveness of a fake cancer drug Krebiozen.
#blackhistorymonth
Alma Levant Hayden became one of the first black American scientists at NIH, and later the FDA. Her research focused on spectrophotometry, and she was instrumental in proving the ineffectiveness of a fake cancer drug Krebiozen.
#blackhistorymonth
February 10, 2025 at 3:45 PM
Black History Month, Public Health Edition
Alma Levant Hayden became one of the first black American scientists at NIH, and later the FDA. Her research focused on spectrophotometry, and she was instrumental in proving the ineffectiveness of a fake cancer drug Krebiozen.
#blackhistorymonth
Alma Levant Hayden became one of the first black American scientists at NIH, and later the FDA. Her research focused on spectrophotometry, and she was instrumental in proving the ineffectiveness of a fake cancer drug Krebiozen.
#blackhistorymonth
William Herschel, German-born British astronomer, born #OTD 1738; discovered planet Uranus in 1781, pioneered use of astronomical spectrophotometry, discovered infrared radiation; Fellow Royal Society, first President Royal Astronomical Society.
Portrait by Abbott 1785, NPG London
Herschel Museum
Portrait by Abbott 1785, NPG London
Herschel Museum
November 15, 2025 at 6:02 AM
William Herschel, German-born British astronomer, born #OTD 1738; discovered planet Uranus in 1781, pioneered use of astronomical spectrophotometry, discovered infrared radiation; Fellow Royal Society, first President Royal Astronomical Society.
Portrait by Abbott 1785, NPG London
Herschel Museum
Portrait by Abbott 1785, NPG London
Herschel Museum
BTW in case you were wondering, based on our spectrophotometry lab, the concentration of Brilliant Blue (aka blue dye #1) in blue Powerade is about 4 µM, or 3.1 milligrams of blue dye per 32 oz. bottle. If you get "Fierce" blue, the concentration of dye is about double.
Hard hitting science.
Hard hitting science.
Pro tip to make grading lab reports easier: make sure every student with messy handwriting is matched with a partner whose writing is neat. That way at least one copy of each team's data table will be legible.
April 19, 2026 at 6:54 PM
BTW in case you were wondering, based on our spectrophotometry lab, the concentration of Brilliant Blue (aka blue dye #1) in blue Powerade is about 4 µM, or 3.1 milligrams of blue dye per 32 oz. bottle. If you get "Fierce" blue, the concentration of dye is about double.
Hard hitting science.
Hard hitting science.
William Herschel, German-born British astronomer, discovered planet Uranus #OTD 1781; pioneered use of astronomical spectrophotometry, discovered infrared radiation; Fellow Royal Society, first President Royal Astronomical Society.
Portrait by Lemuel Francis Abbott 1785, NPG London
Herschel Museum
Portrait by Lemuel Francis Abbott 1785, NPG London
Herschel Museum
March 13, 2026 at 5:58 AM
William Herschel, German-born British astronomer, discovered planet Uranus #OTD 1781; pioneered use of astronomical spectrophotometry, discovered infrared radiation; Fellow Royal Society, first President Royal Astronomical Society.
Portrait by Lemuel Francis Abbott 1785, NPG London
Herschel Museum
Portrait by Lemuel Francis Abbott 1785, NPG London
Herschel Museum
I bet they are. I'll try to find some spectrophotometry data and check.
June 20, 2026 at 5:33 AM
I bet they are. I'll try to find some spectrophotometry data and check.
Yeah this could be a game-changer for specimen-based color research. Ben Hogan and Cassie Stoddard present a pipeline combining whole-specimen image analysis with reflectance spectrophotometry. The only catch? The setup costs about $55k... 💰 doi.org/10.1371/jour...
December 6, 2024 at 4:46 PM
Yeah this could be a game-changer for specimen-based color research. Ben Hogan and Cassie Stoddard present a pipeline combining whole-specimen image analysis with reflectance spectrophotometry. The only catch? The setup costs about $55k... 💰 doi.org/10.1371/jour...
William Herschel, German-born British astronomer, discovered planet Uranus #OTD 1781; pioneered use of astronomical spectrophotometry, discovered infrared radiation; Fellow Royal Society, first President Royal Astronomical Society.
Portrait by Lemuel Francis Abbott 1785, NPG London
Herschel Museum
Portrait by Lemuel Francis Abbott 1785, NPG London
Herschel Museum
March 13, 2025 at 8:53 AM
William Herschel, German-born British astronomer, discovered planet Uranus #OTD 1781; pioneered use of astronomical spectrophotometry, discovered infrared radiation; Fellow Royal Society, first President Royal Astronomical Society.
Portrait by Lemuel Francis Abbott 1785, NPG London
Herschel Museum
Portrait by Lemuel Francis Abbott 1785, NPG London
Herschel Museum
New online! Using spectrophotometry to measure nutrient concentrations in the field
Using spectrophotometry to measure nutrient concentrations in the field
Nature Reviews Earth & Environment, Published online: 17 February 2025; doi:10.1038/s43017-025-00648-zChequita Brooks explains how spectrophotometry can be used to measure concentrations of important molecules in the environment.
www.nature.com
February 17, 2025 at 9:08 PM
New online! Using spectrophotometry to measure nutrient concentrations in the field
Quantitative characterization of melanin-based feather colour using reflectance spectrophotometry url: royalsocietypublishing.org/rsos/article...
Quantitative characterization of melanin-based feather colour using reflectance spectrophotometry
Abstract. Colour produced via melanin pigments is widespread in extant bird feathers and has been inferred in many fossil birds, feathered dinosaurs and pt
royalsocietypublishing.org
February 8, 2026 at 1:23 PM
Quantitative characterization of melanin-based feather colour using reflectance spectrophotometry url: royalsocietypublishing.org/rsos/article...
William Herschel, German-born British astronomer, born #OTD 1738; discovered planet Uranus in 1781, pioneered use of astronomical spectrophotometry, discovered infrared radiation; Fellow Royal Society, first President Royal Astronomical Society.
Portrait by Abbott 1785, NPG London
Herschel Museum
Portrait by Abbott 1785, NPG London
Herschel Museum
November 15, 2024 at 6:08 AM
William Herschel, German-born British astronomer, born #OTD 1738; discovered planet Uranus in 1781, pioneered use of astronomical spectrophotometry, discovered infrared radiation; Fellow Royal Society, first President Royal Astronomical Society.
Portrait by Abbott 1785, NPG London
Herschel Museum
Portrait by Abbott 1785, NPG London
Herschel Museum
French astronomer Marie Bloch was born 123 years ago today. She spent her career at the Lyon Observatory researching the spectrophotometry of variable stars, novae, and comets, and received the Lalande Prize in 1960.
#WomenInSTEM #AstroSky #Astronomy #HistSci 🔭🧪
#WomenInSTEM #AstroSky #Astronomy #HistSci 🔭🧪
July 26, 2025 at 3:14 PM
French astronomer Marie Bloch was born 123 years ago today. She spent her career at the Lyon Observatory researching the spectrophotometry of variable stars, novae, and comets, and received the Lalande Prize in 1960.
#WomenInSTEM #AstroSky #Astronomy #HistSci 🔭🧪
#WomenInSTEM #AstroSky #Astronomy #HistSci 🔭🧪
Marginalized Black chemist 🧪Alma LeVant Hayden got a masters at Howard U, then became a chemist/spectroscopist at the FDA, ultimately exposing a Yugoslavian imported “medication” Krebiozen as fraud in the early 1960s, setting a standard for analytical chemistry of drugs. www.fda.gov/about-fda/fd...
Alma Hayden
Virtual exhibit about former Director of the Spectrophotometry Branch, Alma Hayden
www.fda.gov
April 25, 2025 at 5:33 PM
Marginalized Black chemist 🧪Alma LeVant Hayden got a masters at Howard U, then became a chemist/spectroscopist at the FDA, ultimately exposing a Yugoslavian imported “medication” Krebiozen as fraud in the early 1960s, setting a standard for analytical chemistry of drugs. www.fda.gov/about-fda/fd...
5. Alma LeVant Hayden. www.fda.gov/about-fda/fd...
Alma Hayden
Virtual exhibit about former Director of the Spectrophotometry Branch, Alma Hayden
www.fda.gov
February 5, 2024 at 8:30 PM
5. Alma LeVant Hayden. www.fda.gov/about-fda/fd...
William Herschel, German-born British astronomer, born 1738; discovered planet Uranus #OTD 1781, pioneered use of astronomical spectrophotometry, discovered infrared radiation; Fellow @royalsociety, first President @RoyalAstroSoc
@NPGLondon @HerschelMuseum
@NPGLondon @HerschelMuseum
March 13, 2024 at 6:09 AM
William Herschel, German-born British astronomer, born 1738; discovered planet Uranus #OTD 1781, pioneered use of astronomical spectrophotometry, discovered infrared radiation; Fellow @royalsociety, first President @RoyalAstroSoc
@NPGLondon @HerschelMuseum
@NPGLondon @HerschelMuseum
Dr. Simon Steel is Deputy Director of the Carl Sagan Center for Research at the SETI Institute. As an observational astrophysicist, he specialized in optical spectrophotometry and was interested in the star formation histories of galaxies.
#Education #PublicOutreach #NotJustAliens 🧪
#Education #PublicOutreach #NotJustAliens 🧪
June 6, 2026 at 3:00 PM
Dr. Simon Steel is Deputy Director of the Carl Sagan Center for Research at the SETI Institute. As an observational astrophysicist, he specialized in optical spectrophotometry and was interested in the star formation histories of galaxies.
#Education #PublicOutreach #NotJustAliens 🧪
#Education #PublicOutreach #NotJustAliens 🧪
Yeah the project I'm working on is specifically about colors outside of screen gamuts, so to confirm a color I suspect is in a certain range, I generally have to find a paper with spectrophotometry data, and plot it. There's no way to eyeball it online.
June 14, 2026 at 9:09 AM
Yeah the project I'm working on is specifically about colors outside of screen gamuts, so to confirm a color I suspect is in a certain range, I generally have to find a paper with spectrophotometry data, and plot it. There's no way to eyeball it online.
IRSA has begun distributing SPHEREx Quick Release 3 (QR3) spectral image data, processed with substantially improved PSF and other calibrations. The Spectrophotometry Tool has been updated. New calibration products and an updated Explanatory Supplement too!
irsa.ipac.caltech.edu/data/SPHEREx...
irsa.ipac.caltech.edu/data/SPHEREx...
September 16, 2026 at 9:19 PM
IRSA has begun distributing SPHEREx Quick Release 3 (QR3) spectral image data, processed with substantially improved PSF and other calibrations. The Spectrophotometry Tool has been updated. New calibration products and an updated Explanatory Supplement too!
irsa.ipac.caltech.edu/data/SPHEREx...
irsa.ipac.caltech.edu/data/SPHEREx...
You probably use a NanoDrop to check your plasmid DNA concentration — but do you really know what those A260/280 and A260/230 ratios mean?
Contaminants like phenol and guanidine salts can throw off your readings. Learn more in our latest blog:
🔗 https://twp.ai/4inqIS
Contaminants like phenol and guanidine salts can throw off your readings. Learn more in our latest blog:
🔗 https://twp.ai/4inqIS
blog.addgene.org
What’s in Your Tube?: A Quick Guide to Measuring DNA by Spectrophotometry
twp.ai
July 3, 2025 at 10:00 AM
You probably use a NanoDrop to check your plasmid DNA concentration — but do you really know what those A260/280 and A260/230 ratios mean?
Contaminants like phenol and guanidine salts can throw off your readings. Learn more in our latest blog:
🔗 https://twp.ai/4inqIS
Contaminants like phenol and guanidine salts can throw off your readings. Learn more in our latest blog:
🔗 https://twp.ai/4inqIS
🧪 New paper out! Growing up, wall lizards undergo a UV-visible “awkward phase” (who doesn’t?) that we can’t see—but they can. These ontogenetic color changes may mediate juvenile–adult interactions by delaying the onset of adult social signals. doi.org/10.1002/jez.... #colsci #lizard #ontogeny
Cryptic Ontogenetic Changes in the Ventral Coloration of a Color Polymorphic Wall Lizard (Podarcis muralis)
Wall lizards' ventral coloration undergoes cryptic ontogenetic color changes invisible without UV vision. We tracked wall lizards from hatching to one year of age. Spectrophotometry and visual modeli...
doi.org
September 29, 2025 at 8:42 AM
🧪 New paper out! Growing up, wall lizards undergo a UV-visible “awkward phase” (who doesn’t?) that we can’t see—but they can. These ontogenetic color changes may mediate juvenile–adult interactions by delaying the onset of adult social signals. doi.org/10.1002/jez.... #colsci #lizard #ontogeny
I have finished revamping the spectrophotometry experiments for quant lab! Here's hoping everything goes as planned.
a woman says fingers crossed and toes too in a gif
Alt: a woman says fingers crossed and toes too in a gif
media.tenor.com
January 9, 2025 at 2:48 AM
I have finished revamping the spectrophotometry experiments for quant lab! Here's hoping everything goes as planned.
Recent paper by Luo et al. in the @rsc.org journal @analyticalmethods.rsc.org . They developed a simple method for quantifying #microplastics in water using adsorption of hydrophobic dyes, combined with ultraviolet-visible spectrophotometry.
A simple method for quantifying microplastics in water utilizing hydrophobic dyes via ultraviolet-visible spectrophotometry - PubMed
Polystyrene microplastics have emerged as a global environmental concern due to their widespread distribution and potential risks to ecosystems and human health. Accurate quantification of…
pubmed.ncbi.nlm.nih.gov
July 14, 2026 at 11:03 AM
Recent paper by Luo et al. in the @rsc.org journal @analyticalmethods.rsc.org . They developed a simple method for quantifying #microplastics in water using adsorption of hydrophobic dyes, combined with ultraviolet-visible spectrophotometry.
Palomar and Apache Point Spectrophotometry of Interstellar Comet 3I/ATLAS by Belyakov et al. 2025
iopscience.iop.org/article/10.3...
iopscience.iop.org/article/10.3...
July 19, 2025 at 2:27 PM
Palomar and Apache Point Spectrophotometry of Interstellar Comet 3I/ATLAS by Belyakov et al. 2025
iopscience.iop.org/article/10.3...
iopscience.iop.org/article/10.3...