#achiral and chiral

[whats-in-a-sentence]

Here the stereocentre is the central cobalt atom, with the enantiomers arising from the two different ways in which the three ligands are arranged around it (figure 17.14).

"Chemistry" 2e - Blackman, A., Bottle, S., Schmid, S., Mocerino, M., Wille, U.

[oh-dear-so-queer]

Firstly, 4-methylcyclohexanol can exist as two stereoisomers – a pair of cis-trans isomers. Both the cis and trans isomers are meso compounds and are achiral.

"Chemistry" 2e - Blackman, A., Bottle, S., Schmid, S., Mocerino, M., Wille, U.

[pseud0knots]

MIRROR LIFE (SAY SOMETHING TWICE, IT MEANS SOMETHING DIFFERENT THE SECOND TIME)

Anton Paar - Basics of polarimetry (Figure 1: Chiral and achiral objects) / via peoplegettingkindamadatfood / X-Force vol.1 #76 / Scientists Tap Into Biology’s ‘Mirror Dimension’ to Create Ultra-Strong Synthetic RNA / catcrumb / float dual moving filter by old blood noise endeavors (via computerexploder) / Frank Herbert, Dune: Messiah

[mawrblaidddrwg]

My humble fanart inspired by the lovely @serenityhime1’s fanfic Chiral which can be found here. Go read it and the partner story Achiral here if you haven’t yet, they’re so good!

[serenityhime1]

Reflections Commentary and Q&A

I'm going to put a cut below to avoid spoliers for anyone who doesn't want them, but I'm going to answer some questions that I was asked about Reflections and share a little commentary. Please feel free to ask further questions if you would like!

I am truly overwhelmed with the support I got for writing Reflections. It was a fun idea I had to write two stories that started in the same place but diverged due to a single change, and the way that played out in telling two different stories. It was important to me that chapters updated simultaneously to give the reader the experience of seeing both stories at the same time, rather than read one story and then the other in their entirety, because it was about how things were different moment-to-moment rather than telling two stories that started with the same premise.

Writing these stories was an exercise in patience as I went back and forth between stories to confirm details and make sure everything was in the right place and the right time. It was only 10 chapters, but definitely felt like the 20 chapters it actually was. Both stories together were over 80k words!

I didn't think anyone would really care too much, but it was well-received and I am incredibly appreciative. It was a strange creative project that was just meant to explore the way we tell stories, but people enjoyed the stories, too, and that means a lot. Anyways, questions below the cut!

@loverinthesnow asked:

Hi! Reflections was such a pleasure to read. I’m going to miss Bulma and Vegeta so much! My question for you: did Vegeta make any choices in the few weeks before each version of the fic that may have influenced the very beginning of the story?

Thank you for the kind words! Vegeta did a lot of self-reflection before the story started. At the time the story picked up, he'd been single for a few months and spending a lot of time thinking about what he wanted out of life, and out of a relationship. It takes time to unwind a lot of the damage an abusive partner can do to you.

Fortunately a lot of that self-reflection led him to a place where he was at least appreciative of the loud, beautiful woman he kept running into at the coffee shop, but he couldn't quite bring himself to talk to her. In a lot of ways it felt too soon, and too late. In one story he accidentally finds a way to start a conversation, and it takes him by surprise. In the other story, he makes a realization and uses his knowledge to his advantage to get her to start the conversation.

It's a little manipulative, perhaps, but it works!

@vegetasmyheart asked:

Reflection was a unique experience. Thank you for sharing your creativity. I was just curious if you prefer one version over the other?

First of all, how dare you ask if I have a favorite child, and the answer is yes of course I have a favorite child. I'm kidding of course! I'd say that taken on their surface I prefer Chiral, because I like a good, confident Bulma who goes after what she wants and gets it. She inspires the best in her partner, and even though she makes mistakes she navigates those with aplomb and we love her for it.

Taken together though, and in the spirit of the project, I really love Achiral. There was a long stretch where people felt like I (or the universe) was a little harsh on Achiral Bulma, but I think that it's important to recognize that insecurity is something we all deal with, and vulnerability is not a bad thing. I definitely don't see Achiral as the "bad" storyline - Bulma and Vegeta get together at almost the same time and they have sex there first, and it's wildly passionate. Perhaps it's a little less emotionally grounded, but we get to see over time that develops just as it did in Chiral.

I also had someone mention they were a little concerned about Krillin living with Roshi, and while I reassured them I just want to reassure all of you that Roshi, while an utter creep to women, is also weirdly progressive and therefore not interested in Krillin at all (since he's a man).

Thank you all for the kind words, loving comments, and questions. I am so glad I got the chance to work on this and had so many people who were invested in it. I appreciate it more than words can say <3

[hexagr]

Mirror life presents potential dangers. For example, a chiral-mirror version of cyanobacteria, which only needs achiral nutrients and light for photosynthesis, could take over Earth's ecosystem due to lack of natural enemies, disturbing the bottom of the food chain by producing mirror versions of the required sugars.

[themattress]

An observation based on these posts I've made.

It's been longtime commonly accepted wisdom that Naoko Takeuchi didn't know how to do villains well in the Sailor Moon manga, and that the 90s anime handled villains much better.

And I have to say....

No, that's wrong!

The truth is actually a little more complicated than that.

Naoko Takeuchi has, in fact, written some fleshed-out and nuanced villains. Danburite, Kunzite, Queen Beryl, Rubeus, Esmeraude, Safir, Prince Demande, Professor Tomoe, the Amazoness Quartet, Sailor Tin Nyanko, Sailor Lethe and Sailor Mnemosyne, and Sailor Galaxia are all more than just "evil"; they have established backstories and motivations behind what they do and distinguishable personalities. So is Kaolinite in Sailor Moon Crystal, which was supervised by Takeuchi, becoming more sympathetic than just the wicked witch she was in the manga. And of course, Evil Endymion and Black Lady are corrupted heroes.

Meanwhile, we also have Queen Metalia, Wiseman / Death Phantom, Pharaoh 90 and Mistress 9, Zirconia / Queen Nehelenia and Chaos, who are intentionally devoid of nuance because they are supposed to be pure evil. Yes, the anime changed that in regards to Zirconia / Queen Nehelenia and that worked well (in SuperS anyway, fuck Sailor Stars), but that doesn't make Takeuchi's take any less valid or effective for her version of the story.

So which villains are just one-note and existing to be fought and killed in the manga?

Jadeite, Nephrite, Zoisite, Koan, Berthier, Petz, Calaveras, Chiral and Achiral, Eudial, Mimete, Viluy, Tellu, Cyprine/Ptilol, Fish Eye, Tiger's Eye, Hawk's Eye, Xenotime and Zeolite, Sailor Iron Mouse, Sailor Aluminum Seiren, Sailor Lead Crow, Sailor Heavy Metal Papillon, Sailor Phi and Chi, and basically all of the Dark Agency's roster serving under Danburite.

And here's where I must mount a defense of Takeuchi. Yes, the anime fleshes many of those villains out greatly and I am happy for it. However, it is a fallacy to treat their roles in the manga the same as they were in the anime. In the anime, these characters are part of a formula that positions them as Subordinate Villains, the ones who control the Monsters-of-the-Week. But the manga worked differently. It was a monthly publication, with each arc lasting around a year and the chapters' contents plotted out in advance. In that more limited timeframe, these villains were not controllers of the Monsters-of-the-Week; they were the Monsters-of-the-Week...er, I mean, Monsters-of-the-Month. Complaining about them not being well developed is kind of like complaining that any Youma, Droid, Daimon, Lemures or Phage in the anime isn't well-developed. It's kind of missing the point. And yes, I know that Kunzite, Tin Nyanko, and Lethe/Mnemosyne are also technically among this type of character yet they were more strongly humanized in what time they had, but they're exceptions and not the rule (with Kunzite it happened due to personal fondness Takeuchi felt toward him; and for the others it was due to the need to flesh out Shadow Galactica as an organization, showing both the validity behind why many of its members joined and the ultimate mistake it was due to Sailor Galaxia's psychopathic ruthlessness toward any she deems failures or traitors).

So there you have it. By and large, yes, I do prefer the anime's takes on villains. But Naoko Takeuchi's writing for villains doesn't suck, it's just meeting the needs of a different medium.

[er-cryptid]

Chiral or Achiral Ex 1

Patreon

[aralresearch]

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[jcmarchi]

Stripes in a flowing liquid crystal suggest a route to “chiral” fluids

New Post has been published on https://thedigitalinsider.com/stripes-in-a-flowing-liquid-crystal-suggest-a-route-to-chiral-fluids/

Stripes in a flowing liquid crystal suggest a route to “chiral” fluids

Hold your hands out in front of you, and no matter how you rotate them, it’s impossible to superimpose one over the other. Our hands are a perfect example of chirality — a geometric configuration by which an object cannot be superimposed onto its mirror image.

Chirality is everywhere in nature, from our hands to the arrangement of our internal organs to the spiral structure of DNA. Chiral molecules and materials have been the key to many drug therapies, optical devices, and functional metamaterials. Scientists have until now assumed that chirality begets chirality — that is, chiral structures emerge from chiral forces and building blocks. But that assumption may need some retuning.

MIT engineers recently discovered that chirality can also emerge in an entirely nonchiral material, and through nonchiral means. In a study appearing today in Nature Communications, the team reports observing chirality in a liquid crystal — a material that flows like a liquid and has non ordered, crystal-like microstructure like a solid. They found that when the fluid flows slowly, its normally nonchiral microstructures spontaneously assemble into large, twisted, chiral structures. The effect is as if a conveyor belt of crayons, all symmetrically aligned, were to suddenly rearrange into large, spiral patterns once the belt reaches a certain speed.

An MIT study finds that when a liquid crystal slowly flows, its normally orderly microstructures (bottom-left illustration) spontaneously rotate and twist to form macro-scale, tiger-like stripes. The discovery could open new ways to design structured liquids for drug delivery and optical sensing. 

Credit: Courtesy of the researchers

The geometric transformation is unexpected, given that the liquid crystal is naturally nonchiral, or “achiral.” The team’s study thus opens a new path to generating chiral structures. The researchers envision that the structures, once formed, could serve as spiral scaffolds in which to assemble intricate molecular structures. The chiral liquid crystals could also be used as optical sensors, as their structural transformation would change the way they interact with light.

“This is exciting, because this gives us an easy way to structure these kinds of fluids,” says study co-author Irmgard Bischofberger, associate professor of mechanical engineering at MIT. “And from a fundamental level, this is a new way in which chirality can emerge.”

The study’s co-authors include lead author Qing Zhang PhD ’22, Weiqiang Wang and Rui Zhang of Hong Kong University of Science and Technology, and Shuang Zhou of the University of Massachusetts at Amherst.

Striking stripes

A liquid crystal is a phase of matter that embodies properties of both a liquid and a solid. Such in-between materials flow like liquid, and are molecularly structured like solids. Liquid crystals are used as the main element in pixels that make up LCD displays, as the symmetric alignment of their molecules can be uniformly switched with voltage to collectively create high-resolution images.

Bischofberger’s group at MIT studies how fluids and soft materials spontaneously form patterns in nature and in the lab. The team seeks to understand the mechanics underlying fluid transformations, which could be used to create new, reconfigurable materials.

In their new study, the researchers focused on a special type of nematic liquid crystal — a water-based fluid that contains microscopic, rod-like molecular structures. The rods normally align in the same direction throughout the fluid. Zhang was initially curious how the fluid would behave under various flow conditions.

“I tried this experiment for the first time at home, in 2020,” Zhang recalls. “I had samples of the fluid, and a small microscope, and one day I just set it to a low flow. When I came back, I saw this really striking pattern.”

She and her colleagues repeated her initial experiments in the lab. They fabricated a microfluidic channel out of two glass slides, separated by a very thin space, and connected to a main reservoir. The team slowly pumped samples of the liquid crystal through the reservoir and into the space between the plates, then took microscopy images of fluid as it flowed through.

Like Zhang’s initial experiments, the team observed an unexpected transformation: The normally uniform fluid began to form tiger-like stripes as it slowly moved through the channel.

“It was surprising that it formed any structure, but even more surprising once we actually knew what type of structure it formed,” Bischofberger says. “That’s where chirality comes in.”

Twist and flow

The team discovered that the fluid’s stripes were unexpectedly chiral, by using various optical and modeling techniques to effectively retrace the fluid’s flow. They observed that, when unmoving, the fluid’s microscopic rods are normally aligned in near-perfect formation. When the fluid is pumped through the channel quickly, the rods are in complete disarray. But at a slower, in-between flow, the structures start to wiggle, then progressively twist like tiny propellers, each one turning slightly more than the next.

If the fluid continues its slow flow, the twisting crystals assemble into large spiral structures that appear as stripes under the microscope.

“There’s this magic region, where if you just gently make them flow, they form these large spiral structures,” Zhang says.

The researchers modeled the fluid’s dynamics and found that the large spiral patterns emerged when the fluid arrived at a balance between two forces: viscosity and elasticity. Viscosity describes how easily a material flows, while elasticity is essentially how likely a material is to deform (for instance, how easily the fluid’s rods wiggle and twist).

“When these two forces are about the same, that’s when we see these spiral structures,” Bischofberger explains. “It’s kind of amazing that individual structures, on the order of nanometers, can assemble into much larger, millimeter-scale structures that are very ordered, just by pushing them a little bit out of equilibrium.”

The team realized that the twisted assemblages have a chiral geometry: If a mirror image was made of one spiral, it would not be possible to superimpose it over the original, no matter how the spirals were rearranged. The fact that the chiral spirals emerged from a nonchiral material, and through nonchiral means, is a first and points to a relatively simple way to engineer structured fluids.

“The results are indeed surprising and intriguing,” says Giuliano Zanchetta, associate professor at the University of Milan, who was not involved with the study. “It would be interesting to explore the boundaries of this phenomenon. I would see the reported chiral patterns as a promising way to periodically modulate optical properties at the microscale.”

“We now have some knobs to tune this structure,” Bischofberger says. “This might give us a new optical sensor that interacts with light in certain ways. It could also be used as scaffolds to grow and transport molecules for drug delivery. We’re excited to explore this whole new phase space.”

This research was supported, in part, by the U.S. National Science Foundation.

[incirrata]

took one organic chemistry class and now I think about how my socks are achiral but my shoes are chiral every damn time I put my socks and shoes on

[somethingusefulfromflorida]

Chiral

AHIMOTUVWXY

ilovwx

Achiral

BCDEFGJKLNPQRSZ

abcdefghjkmnpqrstuyz

[sailormoonblue]

Chiral and Achiral | Sailor Moon E81

[serenityhime1]

💖 🎶

I should have known this would be complicated with a WIP that is actually two stories, but here I am plowing forward with it anyways!

💖 [Heart] What is your favorite moment in this WIP?

This is complicated because I can't share my actual favorite moment (since it's a spoiler and that's also a complicated question since is that my favorite in one story, in both, in each?), but I'll share this. I love how these moments differ. How you can take a similar set of circumstances, and even just the headspace that someone is in on a given day will change the way they react.

We're all different people on different days - on some days I'm more compassionate, and on some days I might feel extra cranky and selfish. I try to be a nice person all of the time, but some days when I'm splitting up a snack between my wife and myself I take the bigger piece. This story/stories is/are a reflection of that more than anything, I think. Seeing the counterpoints is like getting to look at the conductor's score in an orchestra instead of just one part.

I could go on about this forever, but I'll leave it that seeing the similarities, the differences, and the similarities in the differences - that's my favorite part about this. The writing process has been amazing and I'm excited to see it resolve for readers, too.

🎶 [Notes] Do you have any other WIP related things, like moodboards, character portraits, playlists or similar?

So I frequently do this kind of thing, but weirdly not for this one. Interestingly, if I did I'd have to separate it into three groups - one for Reflections, one for Chiral, and one for Achiral. The characters come from similar places in the story as a whole, but their actions and reactions are so different in both that something like a playlist for one of the fics would wind up different for the other.

Maybe once I'm done writing I'll put together a playlist and commission some fan art for each. I think that would be quite a bit of fun, actually.

[erinptah]

seems legit