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Joel Mainland

@jmainland.bsky.social
282 followers 227 following 17 posts

Olfactory neuroscientist

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Reposted by Joel Mainland
Ben Hayden @benhayden.bsky.social · 02/10/2026
New paper from the Neurosurgery research team at BCM! 🧵 "A population code for semantics in human hippocampus" led by Melissa Franch. We recorded hippocampus single neurons while people listened to podcasts. www.nature.com/articles/s41...
nature.com
A population code for semantics in human hippocampus - Nature Neuroscience
Franch et al. show that human hippocampal neurons encode the meanings of the words we hear through distributed, context-sensitive population activity that mirrors some features of large language model...
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Nicholas A. Christakis @nachristakis.bsky.social · 30/09/2026
Postdoctoral Associate Position in Biosocial Science in the Human Nature Lab! We have a cutting edge research agenda in human social chemosignaling. Scientists with an interest in olfaction and AI or with experience in GC/MS or animal chemosignaling are especially encouraged. Please repost.
academicjobsonline.org
Yale University, Sociology - Human Nature Lab
Job #AJO30989, Postdoctoral Associate Position in Biosocial Science, Sociology - Human Nature Lab, Yale University, New Haven, Connecticut, US
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Bob Pellegrino @kingfunk.bsky.social · 21/05/2026
20% of people have impaired smell. Almost no cookbooks account for that. #LongCOVID #anosmia Rediscovering Flavor, a new type of cookbook, changes that — science, practical guidance, and recipes co-created with smell loss patients. Preorder open now. 🧪 📖 🍽️
amazon.com
Rediscovering Flavor: A Practical Guide for Smell Loss
Rediscovering Flavor: A Practical Guide for Smell Loss: 9783032080554: Medicine & Health Science Books @ Amazon.com
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Datta Lab @dattalab.bsky.social · 29/04/2026
Excited to see our paper describing a stereotyped receptor map for smell (led by @davidhbrann.bsky.social ) out in the world! See below for short thread with open access link to paper www.nytimes.com/2026/04/29/s...
nytimes.com
Scientists Unveil ‘Long Lost’ Map for Smell
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Association for Chemoreception Sciences (AChemS) @achems.bsky.social · 24/04/2026
🎉Congratulations #AChemS2026 Career Award Winners! Don't miss their award presentations tonight at 7:30 PM.
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Joel Mainland @jmainland.bsky.social · 17/04/2026
Doty raises a point about the limits of our odor descriptors. Here's a vial from our lab. A trained panel described it as "Musty, Ozone, Earthy, Medicinal." A perfumer smelled it and said: "The hot tub is near." We have room to improve how we describe what we smell.
Numerical ratings of odor character, an image of the odor vial, and an image suggesting "the hot tub is near"
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Joel Mainland @jmainland.bsky.social · 17/04/2026
Doty replied, pushing back on several points. We see modern models predicting perception as half full and he sees them as half empty. doi.org/10.1093/chemse/bjag004
doi.org
Response to Comments of Pellegrino et al.
I thank Robert Pellegrino and his associates for taking the time to read my review (Doty (2025) and to put forward what they view are its four key argument
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Joel Mainland @jmainland.bsky.social · 17/04/2026
In 2023, machine learning models predicting odor character from molecular structure outperformed the median trained human panelist on a prospective test of 400 molecules. These models are now genuine tools, not speculation. doi.org/10.1126/scie...
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Joel Mainland @jmainland.bsky.social · 17/04/2026
We argue that although odor perception is cognitively mediated, so is color vision. Color perception changes with brightness, genetics, culture, and context. That didn't stop colorimetry from becoming a precise and practical tool. doi.org/10.1093/chemse/bjag003
The internet meme of a dress that looks blue and black to some viewers and white and gold to other viewers.
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Joel Mainland @jmainland.bsky.social · 17/04/2026
Doty reviewed the long history of classifying odors and linking them to chemistry. His conclusion: odor qualities are cognitive constructs. They don't map neatly onto physical dimensions the way color maps to wavelength, and computational models “haven’t fared well.” doi.org/10.1093/chemse/bjaf022
doi.org
Odors as cognitive constructs: history of odor classification and attempts to map odor percepts to physical and chemical parameters
Abstract. Attempts to map odor percepts to physical and chemical parameters have a long and challenging history. In contrast to color vision, where three c
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Joel Mainland @jmainland.bsky.social · 17/04/2026
Can we predict what a molecule smells like from its structure? A new exchange in @ChemSenses debates this question. 🧪 @kingfunk.bsky.social
The odor limonene feeding into a neural network to predict the odor.
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Bob Pellegrino @kingfunk.bsky.social · 16/01/2026
1/3 The humble glass jar is a workhorse in olfactory research, but comes w/ hidden problems: - Unknown headspace concentration - Concentration dilution by ambient air These add noise to odor measurements. Our preprint introduces something new, something bag.🧪 @jmainland.bsky.social & Matt Andres
biorxiv.org
Odor Sampling Bags Enable Reliable Delivery of Controlled Odor Concentrations
Precise control of odorant concentration is essential for reliable olfactory research, yet existing odorant delivery methods often suffer from solvent interactions and dilution from ambient air, limiting stimulus consistency in olfactory research. We developed an odor sampling bag system using Nalophan plastic to create a closed headspace with air as the carrier medium, eliminating solvent-related variability and ambient air dilution. In two independent experiments, 15 trained panelists each rated the perceived intensity of seven concentrations of benzaldehyde and 2-heptanone using both gas-sampling bags and glass jars. Bags produced higher maximum perceptual intensities (p < 0.001) and greater test-retest reliability than jars (Experiment 1: r = 0.89 vs. 0.81, p < 0.001; Experiment 2: r = 0.86 vs. 0.72, p < 0.001). Notably, the two tested odorants showed different maximum intensities in bags (p < 0.001) but not jars (p = 0.85), suggesting bags better preserve odorant-specific concentration differences. Photoionization detector measurements confirmed stable headspace concentrations over time, comparable to industry-standard Tedlar bags. This cost-effective approach offers improved stimulus control for olfactory psychophysics research. ### Competing Interest Statement Joel D. Mainland serves on the scientific advisory board of Osmo Labs, PBC and receives compensation for these activities. National Institutes of Health, https://ror.org/01cwqze88, F32 DC020380, T32 DC000014, U19 NS112953, R01 DC017757, R01 DC021663
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bioRxivpreprint @biorxivpreprint.bsky.social · 17/12/2025
High-Fidelity Tuning of Olfactory Mixture Distances in the Perceptual Space of Smell Through a Community Effort www.biorxiv.org/content/10.64898/20…
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Nicholas A. Christakis @nachristakis.bsky.social · 31/10/2025
Cool new post-doctoral position in my lab on the area of human social chemosignaling. What role does odor and olfaction play in shaping social behavior? (Here also is a 10-minute video about this new line of work in the Human Nature Lab: humannaturelab.net/making-of/so... .) Please share.
academicjobsonline.org
Yale University, Sociology - Human Nature Lab
Job #AJO30989, Postdoctoral Associate Position in Biosocial Science, Sociology - Human Nature Lab, Yale University, New Haven, Connecticut, US
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Joel Mainland @jmainland.bsky.social · 13/10/2025
Scientists at Firmenich buff.ly/jq1TyYa and now Givaudan buff.ly/u2gP5Ow report several olfactory receptors that appear to map cleanly onto specific odor notes (earthy, grapefruit, woody, etc.). 🧪
cell.com
Decoding human olfaction by high heterologous expression of odorant receptors detecting signature odorants
Emter et al. improve in vitro expression of odorant receptors (OR) by engineering the C-terminal domain. With a library of engineered ORs, they discover ORs for signature odorants, which they relate…
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Joel Mainland @jmainland.bsky.social · 12/08/2025
New preprint from the very talented Bob Pellegrino! 🧪
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Science X / Phys.org @sciencex.bsky.social · 30/07/2025
Analysis of over 21,000 individuals identifies seven new genetic regions linked to odor perception, with some effects differing between men and women and connections to Alzheimer's risk. doi.org/g9vn4j
medicalxpress.com
How do our genes influence our sense of smell? Study finds sex-specific effects
How we smell is not just a matter of taste—it's also influenced by our genes. An international team of researchers led by scientists from Leipzig University has conducted the largest genetic study to date on the human sense of smell.
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Joel Mainland @jmainland.bsky.social · 22/07/2025
In May we launched the DREAM Olfactory Mixtures Prediction Challenge 2025. The leaderboard round closed yesterday and 71 teams submitted predictions! Even if you missed the leaderboard phase, you can still submit a final model for the August 8th deadline.
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Joel Mainland @jmainland.bsky.social · 08/05/2025
My favorite part of these challenges is actually after the competition closes. All participants get together and work collaboratively on a manuscript summarizing key insights and where the field stands. Join us! www.synapse.org/Synapse:syn6...
synapse.org
DREAM Olfactory Mixtures Prediction Challenge 2025
'DREAM Olfactory Mixtures Prediction Challenge 2025' (Synapse ID: syn64743570) is a project on Synapse. Synapse is a platform for supporting scientific collaborations centered around shared biomed...
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Joel Mainland @jmainland.bsky.social · 08/05/2025
Building on last year's Mixture Discriminability Challenge, we're offering a dataset of 650+ blends, each assessed by trained panelists using a 51-word scent lexicon.
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Joel Mainland @jmainland.bsky.social · 08/05/2025
Most existing models predict odor perception at just one concentration. Yet, some odorants dramatically shift in quality as concentration changes—such as grapefruit mercaptan, pleasantly fruity at low concentrations but distinctly sulfurous at high levels.
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Joel Mainland @jmainland.bsky.social · 08/05/2025
This year, we have two challenges: 1) Predicting how odor quality changes with concentration, and 2) Describing an olfactory mixture. You can make up to three leaderboard submissions until July 21st, with one final submission allowed before August 8th.
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Joel Mainland @jmainland.bsky.social · 08/05/2025
Last year, we ran the second DREAM Olfaction Prediction Challenge www.synapse.org/Synapse:syn5... . This time focusing on predicting the similarity of mixture pairs.
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Joel Mainland @jmainland.bsky.social · 08/05/2025
Ten years ago the first DREAM Olfaction Prediction Challenge launched to predict the smell of a molecule from its structure. This led to a publication establishing benchmarks doi.org/10.1126/scie... , and then a subsequent surge in predictive modeling.
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Joel Mainland @jmainland.bsky.social · 08/05/2025
With a contemporary smartphone, capturing, transmitting, and replicating sounds and visuals is a breeze, yet replicating scents remains elusive. If you want to change this, consider joining the 2025 DREAM Olfaction Challenge at www.synapse.org/Synapse:syn6.... @oldbap.bsky.social
synapse.org
DREAM Olfactory Mixtures Prediction Challenge 2025
'DREAM Olfactory Mixtures Prediction Challenge 2025' (Synapse ID: syn64743570) is a project on Synapse. Synapse is a platform for supporting scientific collaborations centered around shared biomed...
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Kevin Hall @kevinh-phd.bsky.social · 16/04/2025
After 21 years at my dream job, I’m very sad to announce my early retirement from the National Institutes of Health. My life’s work has been to scientifically study how our food environment affects what we eat, and how what we eat affects our physiology.
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Bozza Lab @neuroboz.bsky.social · 06/03/2025
Check out our review comparing typical experimental to naturally-occurring odor concentrations. You might be surprised. www.jneurosci.org/content/45/1... Thanks to Matt and Betty for asking me to take part!
jneurosci.org
Recalibrating Olfactory Neuroscience to the Range of Naturally Occurring Odor Concentrations
Sensory systems enable organisms to detect and respond to environmental signals relevant for their survival and reproduction. A crucial aspect of any sensory signal is its intensity; understanding how...
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Derek Lowe @dereklowe.bsky.social · 04/02/2025
A long post about what’s happening to the science funding agencies in the US and why. As mentioned, this one just kept getting longer even as I kept stripping curse words from it. www.science.org/content/blog...
science.org
What's Happening Inside the NIH and NSF
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Jeremy Berg @jeremymberg.bsky.social · 03/02/2025
SOME GOOD NEWS ABOUT NIH FUNDING Closed sessions of institute and center Advisory Counsel meetings are now permitted. This is where grant applications are discussed and approved for potential funding. Open sessions where there are public presentations and discussions are still not allowed.
media.tenor.com
a man with glasses and a black shirt says " it 's a small step that really goes a long way "
ALT: a man with glasses and a black shirt says " it 's a small step that really goes a long way "
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Bob Pellegrino @kingfunk.bsky.social · 26/01/2025
Alexander Fjaeldstad and I have a new chapter in the book Smell, Taste, Eat: The Role of the Chemical Senses in Eating Behaviour, edited by @LorenzoDStafford. Lots of great insights here. From our chapter, it’s clear that smell loss and its impact on ingestion remain vastly underexplored."
link.springer.com
The Effect of Olfactory Disorder (and Other Chemosensory Disorders) on Perception, Acceptance, and Consumption of Food
People with changes in the overall sensory experience of food often complain of taste disturbances, although the problem is normally caused by the loss of aroma in the food (thus an olfactory disorder...
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Gabriele Uhl @uhl-lab.bsky.social · 06/01/2025
doi.org/10.1073/pnas... Olfaction in spiders. We found that the wall pore sensilla in spiders look similar from the outside to those of insects, but differ ultrastructurally in various ways. Independent evolution! 🧪
doi.org
Olfaction with legs—Spiders use wall-pore sensilla for pheromone detection | PNAS
The sense of smell is a central sensory modality of most terrestrial species. However, our knowledge of olfaction is based on vertebrates and insec...
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Alex Koulakov @alexkoulakov.bsky.social · 13/12/2024
Our DeepNose paper is in arxiv. In it, we present an equivariant CNN which can predict human olfactory perception based on molecular shapes, including mixtures. Comments/suggestions are very welcome. arxiv.org/abs/2412.08747
arxiv.org
DeepNose: An Equivariant Convolutional Neural Network Predictive Of Human Olfactory Percepts
The olfactory system employs responses of an ensemble of odorant receptors (ORs) to sense molecules and to generate olfactory percepts. Here we hypothesized that ORs can be viewed as 3D spatial filter...
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The Transmitter @thetransmitter.bsky.social · 11/12/2024
A background in physics, and his own curiosity, have helped Dmitry Rinberg tackle the complexities of the neuroscience of smell. More on Rinberg sniffing out the mysteries of olfaction. By Lina Zeldovich www.thetransmitter.org/olfaction/sn...
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Carl T. Bergstrom @carlbergstrom.com · 06/12/2024
The core figure, showing review counts from Publons data, indeed shows the intended effect but buries the lede: No one uses Publons anymore.
"Fig. 2 This figure illustrates reviewers’ average number of reviews before and after treatment. The x-axis represents the years, and the y-axis shows the
average number of reviews. The solid line on the x-axis at 2018 represents treatment (i.e., accolade award received), while the dashed lines in 2017 and
2019 differentiate the periods before and after treatment. Red line represents the control group (non-winners), while the blue one represents the
experimental group (winners). Before treatment, the trends in both groups are similar, with the experimental group showing higher values than the control
group, while after treatment, the experimental group shows lower values compared to the control group"
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Ben Hayden @benhayden.bsky.social · 22/11/2024
Important paper! www.biorxiv.org/content/bior... Im not sure the Discussion fully delineates its radical implications. No more... * Place cells * Grid cells, splitter cells, border cells * Mirror neurons * Reward neurons * Conflict cells (continued)
biorxiv.org
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Joel Mainland @jmainland.bsky.social · 23/11/2024
Hi Monica, Could you please add me to the feed? I am an olfactory neuroscientist. Here is my staff page: monell.org/joel-mainland/ and Scholar profile scholar.google.com/citations?us... Thank you!
monell.org
Joel D. Mainland - Monell Chemical Senses Center
Joel Mainland's research goal is to develop a predictive model relating molecular structure and olfactory perception.
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Matthew Cobb @matthewcobb.bsky.social · 13/11/2024
New paper in Nature showing how smell works in humans - no quantum woo involved, surprise surprise. Terrific stuff from Claire de March, Hiro Matsunami and others. Summarised here: www.nature.com/articles/d41...
nature.com
Engineered receptors show how humans tell countless odour molecules apart
The structures of engineered odorant receptors.
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kevinbolding.bsky.social @kevinbolding.bsky.social · 26/04/2024
My lab is looking for a postdoc to record lots of neurons while mice sniff each other. Basically I think that will tell us something more interesting about sensory processing than blasting pineapple smell into their noses. You don’t have to be an olfactionist to apply. apply.interfolio.com/139308
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