David Eldredge
@citlan.bsky.social
Molecular Bio/Chem Zoology-Evolution from @BYU. Teach Gen Chem, O-Chem labs @ slcc.edu & English & Piano Online. (Business Partner of naltic.com)
@citlanx on X & linkedin.com/in/d-eldredge/
@citlanx on X & linkedin.com/in/d-eldredge/
Ventilation in my lab yesterday. Maintained 22.9 #ACH 2nd hour. First hour 9.88 ACH (air changes per hour).
24 students + 1 instructor in a 450 m³ room.
Pre-occupancy CO₂: 538 ppm
First hour average peak: 615 ppm
Second hour: 585 ppm
See tinyurl.com/ACHcalc1
#Aranet4 #SAFEindoorAir #SchoolCO2
24 students + 1 instructor in a 450 m³ room.
Pre-occupancy CO₂: 538 ppm
First hour average peak: 615 ppm
Second hour: 585 ppm
See tinyurl.com/ACHcalc1
#Aranet4 #SAFEindoorAir #SchoolCO2
May 28, 2025 at 1:37 PM
Ventilation in my lab yesterday. Maintained 22.9 #ACH 2nd hour. First hour 9.88 ACH (air changes per hour).
24 students + 1 instructor in a 450 m³ room.
Pre-occupancy CO₂: 538 ppm
First hour average peak: 615 ppm
Second hour: 585 ppm
See tinyurl.com/ACHcalc1
#Aranet4 #SAFEindoorAir #SchoolCO2
24 students + 1 instructor in a 450 m³ room.
Pre-occupancy CO₂: 538 ppm
First hour average peak: 615 ppm
Second hour: 585 ppm
See tinyurl.com/ACHcalc1
#Aranet4 #SAFEindoorAir #SchoolCO2
This photo just came in today 😊
May 18, 2025 at 9:32 PM
This photo just came in today 😊
Why must they grow up?
This was taken on 17 May 2008. My little girl is gone...now an adult, facing life with new challenges. Like the hour hand on a clock, you cannot see it move, but looking back, you realize it never stood still.
This was taken on 17 May 2008. My little girl is gone...now an adult, facing life with new challenges. Like the hour hand on a clock, you cannot see it move, but looking back, you realize it never stood still.
May 18, 2025 at 2:14 PM
Why must they grow up?
This was taken on 17 May 2008. My little girl is gone...now an adult, facing life with new challenges. Like the hour hand on a clock, you cannot see it move, but looking back, you realize it never stood still.
This was taken on 17 May 2008. My little girl is gone...now an adult, facing life with new challenges. Like the hour hand on a clock, you cannot see it move, but looking back, you realize it never stood still.
7/n
👩🏫 Fellow STEM Instructors:
Do you allow or require photo documentation in your labs?
How do you address safety, equity, and data permanence?
Would love to hear how others are blending visual tools with core scientific habits.
#STEMEducation #ChemistryLab
👩🏫 Fellow STEM Instructors:
Do you allow or require photo documentation in your labs?
How do you address safety, equity, and data permanence?
Would love to hear how others are blending visual tools with core scientific habits.
#STEMEducation #ChemistryLab
May 7, 2025 at 6:03 PM
7/n
👩🏫 Fellow STEM Instructors:
Do you allow or require photo documentation in your labs?
How do you address safety, equity, and data permanence?
Would love to hear how others are blending visual tools with core scientific habits.
#STEMEducation #ChemistryLab
👩🏫 Fellow STEM Instructors:
Do you allow or require photo documentation in your labs?
How do you address safety, equity, and data permanence?
Would love to hear how others are blending visual tools with core scientific habits.
#STEMEducation #ChemistryLab
6/n
🔬 Real-World Tie-In
From #Photo51 to modern lab audits, visual documentation is a cornerstone of scientific research and regulatory compliance.
🔬 Real-World Tie-In
From #Photo51 to modern lab audits, visual documentation is a cornerstone of scientific research and regulatory compliance.
May 7, 2025 at 6:01 PM
6/n
🔬 Real-World Tie-In
From #Photo51 to modern lab audits, visual documentation is a cornerstone of scientific research and regulatory compliance.
🔬 Real-World Tie-In
From #Photo51 to modern lab audits, visual documentation is a cornerstone of scientific research and regulatory compliance.
5/n
🔍 Why Photos (videos) Matter
Document setups, procedural steps, and final results
Create a verifiable, reproducible lab record
Strengthen written entries in lab notebooks
🔍 Why Photos (videos) Matter
Document setups, procedural steps, and final results
Create a verifiable, reproducible lab record
Strengthen written entries in lab notebooks
May 7, 2025 at 6:01 PM
5/n
🔍 Why Photos (videos) Matter
Document setups, procedural steps, and final results
Create a verifiable, reproducible lab record
Strengthen written entries in lab notebooks
🔍 Why Photos (videos) Matter
Document setups, procedural steps, and final results
Create a verifiable, reproducible lab record
Strengthen written entries in lab notebooks
4/n This reflects real-world expectations in FDA-regulated and professional labs, where Good Documentation Practices (GDP) are essential.
I emphasize:
“If it’s not documented, it didn’t happen.”
I emphasize:
“If it’s not documented, it didn’t happen.”
May 7, 2025 at 6:00 PM
4/n This reflects real-world expectations in FDA-regulated and professional labs, where Good Documentation Practices (GDP) are essential.
I emphasize:
“If it’s not documented, it didn’t happen.”
I emphasize:
“If it’s not documented, it didn’t happen.”
Do you happen to have a "junk drawer" phone you can donate for a good cause?
📸 𝐖𝐡𝐲 𝐖𝐞 𝐔𝐬𝐞 𝐂𝐚𝐦𝐞𝐫𝐚𝐬 𝐢𝐧 𝐌𝐲 𝐂𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲 𝐋𝐚𝐛𝐬
In my chemistry labs, students are required to document their experimental work, observations, actions. A Camera is one way to do it!
#photo51
1/n
📸 𝐖𝐡𝐲 𝐖𝐞 𝐔𝐬𝐞 𝐂𝐚𝐦𝐞𝐫𝐚𝐬 𝐢𝐧 𝐌𝐲 𝐂𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲 𝐋𝐚𝐛𝐬
In my chemistry labs, students are required to document their experimental work, observations, actions. A Camera is one way to do it!
#photo51
1/n
May 7, 2025 at 5:55 PM
Do you happen to have a "junk drawer" phone you can donate for a good cause?
📸 𝐖𝐡𝐲 𝐖𝐞 𝐔𝐬𝐞 𝐂𝐚𝐦𝐞𝐫𝐚𝐬 𝐢𝐧 𝐌𝐲 𝐂𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲 𝐋𝐚𝐛𝐬
In my chemistry labs, students are required to document their experimental work, observations, actions. A Camera is one way to do it!
#photo51
1/n
📸 𝐖𝐡𝐲 𝐖𝐞 𝐔𝐬𝐞 𝐂𝐚𝐦𝐞𝐫𝐚𝐬 𝐢𝐧 𝐌𝐲 𝐂𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲 𝐋𝐚𝐛𝐬
In my chemistry labs, students are required to document their experimental work, observations, actions. A Camera is one way to do it!
#photo51
1/n
Do you still use paper lab notebooks in your lab courses—or have you gone digital? 🧪📓💻
A small research team (including some of my undergrads) is developing a new #ACS publication focused on modern lab notebook pedagogy in undergraduate science programs.
We’d love your insights #ChemEd #LabNotebook
A small research team (including some of my undergrads) is developing a new #ACS publication focused on modern lab notebook pedagogy in undergraduate science programs.
We’d love your insights #ChemEd #LabNotebook
April 18, 2025 at 5:59 PM
Do you still use paper lab notebooks in your lab courses—or have you gone digital? 🧪📓💻
A small research team (including some of my undergrads) is developing a new #ACS publication focused on modern lab notebook pedagogy in undergraduate science programs.
We’d love your insights #ChemEd #LabNotebook
A small research team (including some of my undergrads) is developing a new #ACS publication focused on modern lab notebook pedagogy in undergraduate science programs.
We’d love your insights #ChemEd #LabNotebook
Special thanks to @lieslmcconchie.bsky.social for her persistence, diplomacy, and 930 days of advocacy that helped move this forward.
#IAQ matters!
assets.churchofjesuschrist.org/m4/60/m460hn...
#IAQ matters!
assets.churchofjesuschrist.org/m4/60/m460hn...
April 13, 2025 at 6:36 PM
Special thanks to @lieslmcconchie.bsky.social for her persistence, diplomacy, and 930 days of advocacy that helped move this forward.
#IAQ matters!
assets.churchofjesuschrist.org/m4/60/m460hn...
#IAQ matters!
assets.churchofjesuschrist.org/m4/60/m460hn...
🎥 Clip from the original 2 Dec 2022 broadcast.
UVU will receive 75 #Aranet4 Home units next week. Students will collect data manually with the Home version.
Thanks @mikeandersonksl.bsky.social for covering these vital air quality stories! #IAQ #CO2 #UTed #PublicHealth
@aranethome.bsky.social
UVU will receive 75 #Aranet4 Home units next week. Students will collect data manually with the Home version.
Thanks @mikeandersonksl.bsky.social for covering these vital air quality stories! #IAQ #CO2 #UTed #PublicHealth
@aranethome.bsky.social
April 4, 2025 at 9:43 PM
🎥 Clip from the original 2 Dec 2022 broadcast.
UVU will receive 75 #Aranet4 Home units next week. Students will collect data manually with the Home version.
Thanks @mikeandersonksl.bsky.social for covering these vital air quality stories! #IAQ #CO2 #UTed #PublicHealth
@aranethome.bsky.social
UVU will receive 75 #Aranet4 Home units next week. Students will collect data manually with the Home version.
Thanks @mikeandersonksl.bsky.social for covering these vital air quality stories! #IAQ #CO2 #UTed #PublicHealth
@aranethome.bsky.social
Aranet Spring Sale, direct w/Aranet.
#Aranet4 #Aranet_Rn #Aranet_R & more!
You end up paying about $23 in shipping making it exactly the same price on Amazon unless you use or send in your own shipping label. FedEx offers "One-Rate" 2-Day Air for ~$12
saftehnika21679.acemlnb.com/lt.php?s=370...
#Aranet4 #Aranet_Rn #Aranet_R & more!
You end up paying about $23 in shipping making it exactly the same price on Amazon unless you use or send in your own shipping label. FedEx offers "One-Rate" 2-Day Air for ~$12
saftehnika21679.acemlnb.com/lt.php?s=370...
March 12, 2025 at 3:50 PM
Aranet Spring Sale, direct w/Aranet.
#Aranet4 #Aranet_Rn #Aranet_R & more!
You end up paying about $23 in shipping making it exactly the same price on Amazon unless you use or send in your own shipping label. FedEx offers "One-Rate" 2-Day Air for ~$12
saftehnika21679.acemlnb.com/lt.php?s=370...
#Aranet4 #Aranet_Rn #Aranet_R & more!
You end up paying about $23 in shipping making it exactly the same price on Amazon unless you use or send in your own shipping label. FedEx offers "One-Rate" 2-Day Air for ~$12
saftehnika21679.acemlnb.com/lt.php?s=370...
This book is meant to give us a clue to the human predicament. The setting of this passage? Ancient America 70 years prior to Christ's visit to the Americas after his resurrection (for those who believe in this book it seems to parallel today).
February 19, 2025 at 1:45 AM
This book is meant to give us a clue to the human predicament. The setting of this passage? Ancient America 70 years prior to Christ's visit to the Americas after his resurrection (for those who believe in this book it seems to parallel today).
February 17, 2025 at 4:53 PM
Outdoor air vis indoor air
February 17, 2025 at 4:28 PM
Outdoor air vis indoor air
"Masks [N95s] and ventilation/filtration help prevent spread"
Thank you! @kkjetelina.bsky.social
Flu breaking records, measles, tuna recall, and federal workers fired
open.substack.com/pub/yourloca...
Thank you! @kkjetelina.bsky.social
Flu breaking records, measles, tuna recall, and federal workers fired
open.substack.com/pub/yourloca...
February 17, 2025 at 4:26 PM
"Masks [N95s] and ventilation/filtration help prevent spread"
Thank you! @kkjetelina.bsky.social
Flu breaking records, measles, tuna recall, and federal workers fired
open.substack.com/pub/yourloca...
Thank you! @kkjetelina.bsky.social
Flu breaking records, measles, tuna recall, and federal workers fired
open.substack.com/pub/yourloca...
Please come risk your health; donating blood in an airtight building where it is preached & taught that one can miraculously prevent the spread of an aerosol infection by simply washing hands.
#FLUisAirborne #RSVisAirborne #COVIDisAirborne #TBisAirborne
@erictopol.bsky.social @njbbari3.bsky.social
#FLUisAirborne #RSVisAirborne #COVIDisAirborne #TBisAirborne
@erictopol.bsky.social @njbbari3.bsky.social
February 12, 2025 at 5:06 PM
Please come risk your health; donating blood in an airtight building where it is preached & taught that one can miraculously prevent the spread of an aerosol infection by simply washing hands.
#FLUisAirborne #RSVisAirborne #COVIDisAirborne #TBisAirborne
@erictopol.bsky.social @njbbari3.bsky.social
#FLUisAirborne #RSVisAirborne #COVIDisAirborne #TBisAirborne
@erictopol.bsky.social @njbbari3.bsky.social
Stern argument with the respiratory technician. She was only donning a ASTM III (yellow surgical), She started giving me the droplet dogma & I just flat out, knee jerk reaction, said "Bull shi*!" She then donned a 3M Aura.
@ihrice.bsky.social why doesn't Intermountain educate staff?
@ihrice.bsky.social why doesn't Intermountain educate staff?
February 7, 2025 at 10:55 PM
Stern argument with the respiratory technician. She was only donning a ASTM III (yellow surgical), She started giving me the droplet dogma & I just flat out, knee jerk reaction, said "Bull shi*!" She then donned a 3M Aura.
@ihrice.bsky.social why doesn't Intermountain educate staff?
@ihrice.bsky.social why doesn't Intermountain educate staff?
What the two galaxies look like now as predicted by GPT, of course it will take another 114 million years for those on this planet to see it as it really is now.
January 5, 2025 at 9:14 PM
What the two galaxies look like now as predicted by GPT, of course it will take another 114 million years for those on this planet to see it as it really is now.
Thanksgiving is 100x less stressful—and so much more enjoyable—than the whirlwind days leading up to Christmas. It shouldn’t be stressful! Trying to manager family funds, trying to please a wife and daughters, it’s no easy feat. Wishing everyone a joyful, peaceful & less stressful holiday season!
December 21, 2024 at 11:14 PM
Thanksgiving is 100x less stressful—and so much more enjoyable—than the whirlwind days leading up to Christmas. It shouldn’t be stressful! Trying to manager family funds, trying to please a wife and daughters, it’s no easy feat. Wishing everyone a joyful, peaceful & less stressful holiday season!
Writers in the late 70s knew this was possible.
December 12, 2024 at 8:23 PM
Writers in the late 70s knew this was possible.
My dairy days were 1979 (age 12) to 1998 (BYU grad). We rinsed suction cups between cows, sterilized before/after each teat, and kept mastitis low: 3–4 cows per 100.
Sharing these 1989 pics—great memories! 🐄✨
Sharing these 1989 pics—great memories! 🐄✨
December 5, 2024 at 5:33 PM
My dairy days were 1979 (age 12) to 1998 (BYU grad). We rinsed suction cups between cows, sterilized before/after each teat, and kept mastitis low: 3–4 cows per 100.
Sharing these 1989 pics—great memories! 🐄✨
Sharing these 1989 pics—great memories! 🐄✨
Somehow, I deleted the rest of its response before I could capture a screenshot, it was pretty witty and clever and was not able to reproduce it. So, this was a final attempt. 😜
December 4, 2024 at 11:19 PM
Somehow, I deleted the rest of its response before I could capture a screenshot, it was pretty witty and clever and was not able to reproduce it. So, this was a final attempt. 😜
