Discover and read the best of Twitter Threads about #chemistry

Most recents (16)

Daily Bookmarks to GAVNet 6/19/2020-2

greeneracresvaluenetwork.wordpress.com/2020/06/19/dai…

Early Release - Seroepidemiologic Study Designs for Determining SARS-COV-2 Transmission and Immunity, September 2020 — CDC

wwwnc.cdc.gov/eid/article/26…

#immunity #coronavirus #designs #serological #transmission
The KLI | News | Discover The KLI

kli.ac.at/content/en/the…

#emergent #economy #niches
Smart chemistry rids anti-cancer drugs of serious side effects

phys.org/news/2020-06-s…

#effects #chemistry #drugs #cancer
Read 5 tweets
Thread. What is the link between #red & worms? Why is there an insect whose Latin name is '#worm little worm'? Let's start with a Sanskrit term: "krimija", "worm-made". (I know no Sanskrit, so please feel free to offer better translations). This was borrowed into Persian as قرمز.
2... qermez (contemporary Tehran pronunciation: ghermez), meaning 'red'. Above, popular Iranian children's TV character kolah ghermezi, 'red hat'. This appears to have happened in early Islamic times; in Middle Persian 'red' is 'sukhr' (New Persian sorkh). What about the worms?
3. Well, before the advent of synthetic #chemistry in the 2nd half of the 19th century, #dyes & pigments were mostly obtained from plant roots, or in certain cases, animals. The most famous is the 'imperial purple' obtained from the glands of Mediterranean sea snails.
Read 16 tweets
@smc429 @kaitlancollins @realDonaldTrump 1/ The other side also sold stock. Ask @SpeakerPelosi what her husband did in the same time frame. And @SenFeinstein did also. The media conveniently leaves out the fact that both sides have crooks. We need people of integrity.
@smc429 @kaitlancollins @realDonaldTrump @SpeakerPelosi @SenFeinstein 2/ since when giving “tide over” money stealing our money? I would say it is just the opposite. @BarackObama never gave us any help. His policies kept us in recession for 8 years!
@smc429 @kaitlancollins @realDonaldTrump @SpeakerPelosi @SenFeinstein @BarackObama 3/ Also, the @DNC was the group that passed #ObamaCare which effectively killed health care for self employed. A $10,000 Deductible and $1500 a month, means you spend $28,000/year before healthcare kicks in. Unless you are on welfare. Then it’s free.
Read 8 tweets
Drawing Innovation: @illumina Super-Resolution Optics

Recently, $ILMN unveiled the NextSeq 2000, a mid-throughput sequencer w/ a ~2X reduction in operating costs ($/GB).

We think the upgrades inside the NextSeq 2000 may soon enable a $100 clinical-depth human #genome.

But how?
The cost savings come from (1) a new upfront #chemistry and (2) super-resolution optics. We think @illumina will use real-world customer data on the NextSeq 2000 to optimize 1 and 2, then possibly upgrade the #NovaSeq line.

illumina.com/systems/sequen…
I'm going to briefly (!) illustrate how #sequencing (*by synthesis*) works, walk through a farming analogy, then dive into some technical details. (Sources at the end)

Below is a general overview of a whole genome sequencing workflow (sample in, data out).
Read 19 tweets
1/25 Part 1 - Why does soap work so well on the SARS-CoV-2, the coronavirus and indeed most viruses? Because it is a self-assembled nanoparticle in which the weakest link is the lipid (fatty) bilayer. A two part thread about soap, viruses and supramolecular chemistry #COVID19
2/25 The soap dissolves the fat membrane and the virus falls apart like a house of cards and "dies", or rather, we should say it becomes inactive as viruses aren’t really alive. Viruses can be active outside the body for hours, even days.
3/25 Disinfectants, or liquids, wipes, gels and creams containing alcohol (and soap) have a similar effects but are not really quite as good as normal soap. Apart from the alcohol and soap, the “antibacterial agents” in these products don't affect the virus structure much at all.
Read 41 tweets
Thinking about a low cost easy to manufacture home test kit for #Coronavirus. Outline: #Nasal_swab (Q-tip) w/ freeze dried reagents for isothermal #DNA amplification with #COVID19 primers. Colorimetric readout by #iOS or #Android #App w/ #geolocation & #HIPPA compliant reporting.
Read-out would be in minutes - timer in App - read by camera in your smart phone. No other machines. Links to telemedicine groups for positive results. Built in positive control - e.g. no color = improper test, green NEGATIVE, red POSITIVE.
I’ve done my best creating when faced by a challenge. Next gen sequencing when my son went to new born intensive care - #454 @iontorrent. Ultrasound on a chip @ButterflyNetInc when wanted to monitor my daughter’s kidneys.
Read 28 tweets
Soap! #Science As promised! But first, here's an easy way to make it. We're gonna make a "tertiary" soap using leftover scraps of soap. (did you save them up last week?)
This'll be super easy.
What you need:
leftover soap scraps (total enough to make a small bar)
yogurt container (8 oz. size)
microwave oven
freezer
cheese grater (optional)
What you do:
grate up all your soap scraps. put them in the bottom of the empty clean yogurt container so maybe 1/2 inch deep. (you can crumble them up too, but the grater will make it much easier).
Add a tiny bit of water, maybe enough to wet the grated soap about half way up.
Read 10 tweets
How about a thread on all the times Science actually wasn't settled? Let's start way back and go from there. Feel free to add - this is just off the cuff and what I could think of in between doing burnouts in my muscle car. #science
360 BC #aristotle posited #aether as a substance needed to explain physical phenomenon. In Aristotles mind Aether helped explain momentum. Newton hadn't been born yet & thus no laws of motion. Instead, he figured some substance acted upon objects in motion, keeping them in motion
This first theory of Aether (there would be more) was of course later debunked by Newtons Laws of Universal Motion.
Read 31 tweets
"You don't see radio changing gradually and suddenly become radar. #Darwin's theory doesn't work for #technology, and we have to make a new observation."

- W Brian Arthur at SFI today

#evolution #innovation #invention
"Novel technologies are constructed from existing technologies. These offer themselves as components for the construction of further technologies."

- W Brian Arthur at SFI today

#evolution #innovation #invention #technology #engineering #design
Unlike the two-parent #inheritance typical to (but not ubiquitous among) #complex organisms, #technology inherits features from n parents - a "vast ancestral #network" more like horizontal gene transfer networks in #bacteria.

W Brian Arthur on sumulating #invention on a chip:
Read 18 tweets
Thread: Another overview amazing #Muslim *female* achievement.

Did you know the first university in the world was built by a Muslim woman approx 1200 years ago?

This is the story of Fatima Al-Fihiri (800–880 CE). #BadassWoman #twitterstorians

1/15
2. Daughter of a wealthy businessman, the family moved from Tunisia to Fez, Morocco during the rule of King Idriss II. When both her husband and father died, Fatima and her sister inherited a fortune.

They chose to spend their inheritance on building educational institutions.
3. In 859, Fatima built the Al-Qayrawan #Mosque, decorated in the Andalusian style with Kufic calligraphy (early style) engraved throughout. At 3,000 sq ft, it can fit 22,000 people.

She stacked it with Islamic works (Qur’ans, #Hadith collections, etc).
Read 16 tweets
Sharing #MyStory as an #international #immigrant a part of @IWS_Network #Voices without #Frontiers initiative! As a #scientist and an advocate for #workplaceequality, I believe in the power of stories. #IWS #VoicesIWS #SayItForward #WomenInspire #WomeninScience #WomenInSTEM
As a child, how would you have liked moving schools in new cities with different cultures every 2-4 years?

Growing up in the #IndianArmy, I absolutely loved it! By the time I was 18, we had moved over 9 times across 9 states! #Diversity #India #TravelTuesday #IWS #VoicesIWS
My #memories of #India include sunny days, welcoming people, rich heritage, vibrant colors, abundant fruits and mouth-watering street food! #IWS #VoicesIWS
Read 39 tweets
Hello, I am Edna Matta. I was born in #Ibague, known as #Colombia’s #CityofMusic. A beautiful place near snow-covered volcanos (Ruiz, Santa Isabel and Tolima), large expanses of paramo forest, lakes and streams where a diverse array of animal and plant species coexist
My story starts with #powerful, #strong #women in my #family. I was the third of 4 children and my mom #firstMentor had to raise us practically alone, since my father had to work in a different city, 20h away by car
My mom is a very #strong #woman that taught me #values, to #workhard and to be #self-sufficient #StrongWomen #StrongFamily
@IWS_Network #VoicesIWS /1
Read 36 tweets
After a jam-packed 2 days at #SciOut18🌪(thx @ASBMB & @rockedu_!) it was time to reflect! 🤔 Reflection is so important, but it can be hard to find ⏰ to really just think! 💭 Some of my thoughts 👉 instagram.com/p/BokNO_NhihF/
#365DaysOfScience #biochemistry #scicomm #sciout #science person looking thoughtful in front of mirrornotebook pagenotebook pagenotebook page
What’s inside? 🧐 It’s FORMAMIDE! 🤗 Formally removing RNA’s form with formamide! 🤓 FORMAMIDE in loading buffer breaks up & replaces the bonds between bases holding RNA's shape together 👇
instagram.com/p/BomwR32B4MX/
#365DaysOfScience #biochemistry #scicomm #lifeinthelab #science person looking through safety goggles with formamide drawn on themformamide RNA denaturant explanation
Bring on the heat! 🔥 To help denaturants get to the huddling hydrophobic bases, we add heat ♨️ 👉 gives molecules more energy so they can “pull apart” more easily ⏩ easier access 👍 More 👇
instagram.com/p/Boo2yazBDDi/
#365DaysOfScience #biochemistry #scicomm #lifeinthelab #science person putting tube in heating block
Read 308 tweets
(1/14) So this is going to be my first true long post to Twitter and I am also covering the debate surrounding the banning of plastic straws. As such, I am rather nervous and I can only hope that this turns out alright! #StrawBan
(2/14) I want to focus on an alternative material used in drinking straws. This material is chitosan, which is also sold under the name of “REPA” amongst others. Chitosan is a biodegradable polymer made from renewable materials used to make flexible straws. #StrawBan
(3/14) Firstly, I shall cover the science. Chitosan is a modified form of chitin. Chitin is taken from renewable sources and deacetylated. This typically occurs through treating it with sodium hydroxide in an aqueous solution. #Chemistry #MaterialsScience
Read 15 tweets
5 Boron B, named after the mineral borax which the element was first extracted from using electrolysis by British Chemist Humphry Davy who called it boracium. The -on suffix came later by analogy with carbon. #EotE #etymology #Chemistry #Science #Language
6 Carbon C, named from Latin for coal: carbo. Late 18th Century French scientists demonstrated graphite, charcoal & diamond made of same element naming it carbone, 1st listed by Antoine Lavoisier in famous 1789 chemistry textbook. #EotE #etymology #Chemistry #Science #Language
7 Nitrogen N, confusion in 16th C led to natron (sodium carbonate) & saltpeter (potassium nitrate) both being named nitre in French. French chemist Jean-Antoine Chaptal named the new gas nitrogene, -gène, producing from Greek -γενής #EotE #etymology #Chemistry #Science #Language
Read 115 tweets
Etymology of the Elements #EotE. This thread will build to explain the name of each of the 118 chemical elements in the periodic table. #etymology #Chemistry #Science #Language

More in The Secret Life of the Periodic Table, 3rd edition out now! pprc.qmul.ac.uk/~still/wordpre…
1 Hydrogen, named from ancient Greek ὑδρο- hydro meaning "water" and -γενής genes meaning "creator" by French Chemist Antoine Lavoisier as it forms water when burnt in air 2H₂+O₂→2H₂O #EotE #etymology #Chemistry #Science #Language
2 Helium, named from the Greek Titan of the Sun Helios (ἥλιος) as it was first seen by the unique yellow light in emits from the Sun by French astronomer Jules Janssen during a total solar eclipse 1868 #EotE #etymology #Chemistry #Science #Language
Read 6 tweets

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