Before I leave you all for the night I wanted to talk about something which I already did a thread on last week over at my account @Rhiannon_Kirton and that is #mentalhealth
This is something that I have struggled with recently (see previous thread) and I know many other grad students have also struggled with. So I want to highlight that you are not alone, many of us share this struggle with you
Grad school is HARD, it is even harder when you are first- gen, BIPOC, LGBTQ+ or from another marginalized background. Often we do not have the resources we need and this is even more true for accessing adequate help for mental health.
I have been fortunate to find amazing friends through science twitter and if you are struggling please know that we are all here to do what we can for you. It is not something to be ashamed of. We're all on this journey together.
and to add to all the other things that might impact mental health, this year has been really really hard and unusual and many of us are grieving. Grieving family lost to COVID (🙋🏾‍♀️), lost opportunities, delayed plans, missed life events etc. Now more than ever it is so important

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More from @realscientists

18 Aug
It's midnight here so I'm gonna sign off and rest a bit, but as a final thought here's one more compelling piece of evidence in favor of dark matter and against alternatives.
It has been proposed that dark matter is not actually there, but rather our picture of gravity is simply incomplete. MOdified Newtonian Dynamics (MOND) says that for masses with very low accelerations, the laws of gravity look different than Newton's law that we always use.
It was developed to explain the flat rotation curves observed by Dr. Vera Rubin, here's that thread from earlier if you missed it:
Read 9 tweets
18 Aug
So, as promised, I have more dark matter evidence to tell you about! So you hear about Einstein and his many contributions all the time. One of those is general relativity. Relax! No math today, just a brief overview. The math scares even me, don't worry. (But it is cool!)
GR is a theory of gravity that says gravitational interactions happen because masses warp space-time around them. Here's the type of picture we always use to visualize that, space-time warping near a massive object: An illustration of space-ti...
In our daily life, we don't encounter massive enough things for this to really matter. But for very massive entities, space-time warps heavily around them. Now, light travels in straight lines. But if space-time ITSELF is curved? The straight line can look like a bend.
Read 5 tweets
17 Aug
Now, what makes us think dark matter is there if we can't see it? The idea arose from a disconnect between the amount of mass needed to account for things like the speeds of stars in galaxies using the laws of Newton and Kepler, and the mass actually producing light.
This notion that there must be mass that we can't see based on dynamics actually goes back over a century, with Lord Kelvin actually making some relevant calculations back in 1906! But we start this discussion with the work of the late, great Dr. Vera Rubin in the 1970s.
Using Kepler's laws for orbits, as you get away from the center of a spiral galaxy where the (normal light-producing, or "baryonic", but I'll just say normal) mass is concentrated, gravity should weaken and stars should orbit more slowly. Well....funny story.
Read 7 tweets
10 Aug
Let's talk mass analyzers!

Okay, so back to our ions we created this morning. We have them and they're entering into our MS, but now we need to be able to tell the difference between them. This is the job of the mass analyzer, to sort the ions by mass-to-charge ratios.
Like with the ionization sources, there are different types of analyzers and also different combinations of them in MS instruments. So you want to make sure the ionization source you use, matches with the mass analyzer (but we won't go too far into that).
I'll give you a brief description of two different mass analyzers. We'll start with time-of-flight (TOF).
Read 8 tweets
3 Aug
Welcome back! The five freedoms of animal welfare focuses on reduction of harms, but there have been some key developments in animal welfare science over the last decade that have seen this concept overtaken. Anyone care to guess what they are?
Over the last 10-15yrs we have learned a lot more about how the brains of animals work, hormones their bodies produce in response to different situations, how aware they are of themselves and others, and how they differ individually #animalwelfare #science
Scientists now recognise evidence that many animals have ‘affective states’ (feelings!) - they not only experience -ve things like pain, but also +ve things like comfort and contentment. The framework we now use for assessing animal welfare recognises this across five key areas.
Read 6 tweets
27 Jul
Let’s kickoff #BlackNeuroRollCall by introducing some of the Black neuroscientists, neuro-engineers, and science communicators on our incredible organizing team! 🙌🏾

We are all SO proud to be #BlackInNeuro ✊🏾🧠
Angeline Dukes @FutureDrDukes is a 4th year PhD student @UCIrvine

She’s the daughter of immigrants from Trinidad 🇹🇹 and Haiti 🇭🇹, a first-generation college graduate 👩🏾‍🎓, and an addiction neuroscientist 🚬🍃

She hopes to be a professor & inspire Black students in STEM 👩🏾‍🏫
Meet @kss_phd aka Dr. Kaela Singleton! She is a BlackQueer woman that earned her PhD in May 👏🏾👏🏾

She is now a postdoc @EmoryUniversity as a #DSPAN and FIRST fellow 👩🏾‍🏫 As a development neuroscientist, she studies how the brain forms in normal and disease states!
Read 17 tweets

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