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NotTheMacAnon
@NotTheMacAnon1 5 years, 9 months ago 1360 views

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Localized Surface Plasmon Resonance - an overview | ScienceDirect Topics

https://t.co/mzS7vVSREJ

https://t.co/353PdAX2fa

https://t.co/3yBImjOdd4

In some cases, almost 100% of the light energy can be converted to the second harmonic frequency. These cases typically involve intense pulsed laser beams passing through large crystals, and careful alignment to obtain phase matching.

NotTheMacAnon
@NotTheMacAnon1

2020 marks the start of the quantum dot revolution.

Completely ignoring the fact that "photocatalytic generation of reactive oxygen species (ROS) from quantum dots (QDs) has been widely reported."

Results: It was found that whereas singlet oxygen (1O2) was not produced by photoexcited QDs, superoxide anion(O2− )and hydroxyl radicals(OH) were generated by QDs, especially in the presence of a physiological concentration of electron donating agent including NADH.

Using cell metabolic activity assays and various probes of ROS generation, the formation of ROS in cellular environments was demonstrated.

Conclusion: Illumination of QD-treated cells and bacteria with light did affect viability. The above results, together with those of assays in the presence of various scavengers of specific ROS, indicate that the formation of ROS by QDs mainly proceeded via electron transfer.

NotTheMacAnon
@NotTheMacAnon1

Transduction is the process by which foreign DNA is introduced into a cell by a virus or viral vector.

Viral vectors are tools commonly used by molecular biologists to deliver genetic material into cells.

Viruses have evolved?

specialized molecular mechanisms

to efficiently

transport their genomes

inside the cells they infect.

Delivery of genes, or other genetic material, by a vector is termed transduction and the infected cells are described as transduced.

A transducer is a device that converts energy from one form to another. Usually a transducer converts a signal in one form of energy to a signal in another.

NotTheMacAnon
@NotTheMacAnon1

Did the paedophiles create the virus?

I think so!

Is Joe Biden the paedophiles choice?

Jury’s out.

Scumbags

Lock them all up and f their vaccine.

NotTheMacAnon
@NotTheMacAnon1

If you shine light of high enough energy on to a metal, electrons will be emitted from the metal.

More from Science

Carlos E. Perez
@IntuitMachine

In physics, energy is that which is causally invariant or symmetric with respect to time. Said differently, energy is never created or destroyed, it is conserved in the universe.

Now there is a question about information. Is information causally invariant? Does information remain the same with respect to time? To understand this, let's first understand what energy is, then attempt to understand what information is.

The strange thing about energy is that it is this universal currency that seems to be interchangeable between the different forces in nature (i.e. electromagnetic, strong, weak and gravity). It is that thing that makes change possible.

Now let's assume that the universe is computational in nature. That is, anything we see in nature is a consequence of computation. That is, there is computation underneath the physics that is driving the universe to change.

What does it mean then that information is conserved in this computational universe? Also, how is energy conservation related to information conservation?

Benedikt Kuhnhaeuser
@BenKuhnhaeuser

The calamoid palms 🌴 have over 500 species spread across the world, but their higher-level relationships were a bit of a mystery. Until now.

Out today in #MolecularPhylogeneticsAndEvolution:

A robust phylogenomic framework for the calamoid palms https://t.co/JiCbSUlheH

1/10

First some background info, so that you know what we are talking about:

Calamoid palms look a bit like snakes 🐍 (don't they!?!), because their fruits are covered in overlapping scales. And with their often fierce spines, they are equally fearsome. 😱

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They are classified into 17 genera, 10 subtribes and 3 tribes. They have an amazing variety of growth forms, from stemless to climbing to tree habit. 🌱🌴

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But as I said, their relationships have been a bit of a mystery. Here's the varying relationships previous studies found over the last 20 years.

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We tackled this mystery with a phylogenomic approach: we sampled almost a thousand genes (a hundred times more than previous studies!) of 75 species representing all calamoid tribes, subtribes and genera.

The resulting data matrix is pretty massive...

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Marina Amaral
@marinamaral2

And since today is International Day of Women and Girls in Science, let's highlight a few of them - just a few women among thousands of others who helped shape the world we live in today.

Thread.

Dorothy Hodgkin discovered the structure of insulin after 36 years of work.

"I was captured for life by chemistry and by crystals."

Sophia Jex-Blake fought for women's rights to study medicine. She was involved in founding two medical schools for women.

"It seemed discreditable to Great Britain that all her daughters who desired a University education should be driven abroad to seek it."

Alice Augusta Ball developed the "Ball Method", the most effective treatment for leprosy during the early 20th century. She was 23.

Ada Lovelace is regarded as the first to recognize the full potential of computers and as one of the first computer programmers.

“That brain of mine is something more than merely mortal; as time will show.”

$James Mitchell \u24cb\U0001f42c$

James Mitchell Ⓥ🐬...
@MesMitch

The endangered whales must contend with up to 1,000 boats moving daily through an important feeding area in the eastern South Pacific, according to research published in the scientific journal Nature.@WeDontHaveTime
#ForNature @JohnKerry

Blue whales threatened by ship collisions in busy Patagonia waters
Endangered giants face potentially fatal encounters with the 1,000 daily fishing vessels moving through main feeding area off Chile, scientists warn\U0001f43b\u200d\u2744\ufe0f @WeDontHaveTime
#ForNature @JohnKerry
— James Mitchell \u24cb\U0001f42c (@MesMitch) February 1, 2021

Navin Kabra
@NGKabra

Did you know that all the nuclear bombs we exploded in the '40s-50s-60s have permanently contaminated all the steel the world has produced since then? All steel in the world is divided into two categories: pre-1945 non-contaminated steel, and post-1945 contaminated steel.

How?

Nuclear bombs (including the tests) create a lot of radioisotopes that are not found in nature. For example Cobalt-60 (a radioactive version of Cobalt-59). And since the 1945 Trinity test, these have all dispersed in the atmosphere.

What does this have to do with steel?

The process of manufacturing steel uses atmospheric air (or atmospheric oxygen). Some of the radioisotopes like Cobalt-60 get pulled in too, and as a result, any steel produced after 1945 has embedded in it some of these radioisotopes, sitting there emitting gamma rays.

Why do we care about traces of radioisotopes in steel? When making Geiger counters, or medical devices to check for radioactive contamination, or astronomical instruments, the emissions from the contaminated steel would interfere with the measurements.

So we need pre-1945 steel

Pre-1945 non-contaminated steel is called "low background steel". And when we need it, where do we get it from?

We go, find pre-World-War-II sunken shipwrecks, and then salvage the steel (and lead) from those to build our instruments which need heavy radiation shielding.

Each of our temples tells the story of our rich history and cultural heritage. Was Nehru that ashamed of his own nation's heritage that he had to cover them up or there was some other reason? The answer would be best known to him only.

PM Nehru invited the then Saudi King Saud bin Abdul Aziz to India who accepted the invitation and planned a 17 day long official visit to India in 1955. Saudi King had brought a large delegation with him and he had to visit various Indian cities like Mumbai, Hyderabad, Agra,

Aligarh, Shimla, Mysore and Varanasi. However, when Saudi King reached Varanasi, Nehru ordered to cover all the temples and Idols with curtains that came in the way of the Royal Convoy. During his stay in Varanasi, Govt buildings were painted with the words "Kalma Tayyiba".

'Kalma Tayyiba' means 'There is not God but only Allah and Mohammed is his messenger'. In addition to it, Pooja and Aartis were also stopped at temples. I can call it the appeasement politics of the highest order and Nehru was indeed the greatest appeaser of all times.

Buzz Chronicles
@buzz_chronicles

@SaveToBookmarks Namaste! You can find it here. Original tweet by @AchuthArora: "@OllieEmberson @buzz_chronicles @rattibha @SaveToBookmarks save as Workouts". Thanks! ✌

Hi! Pleasure is mine. Original tweet by @SaveToBookmarks: "@AchuthArora @OllieEmberson @buzz_chronicles @rattibha Cool mate!

I saved this ...". See You soon! 👌

Noah Smith
@Noahpinion

1/People I know on the Right tend to be obsessed with the idea of "crimethink", taboos, and the (supposedly) oppressive, omnipresent enforcement of liberal cultural norms.

Why?

My new theory: A lot of it is guilt.

2/It's true that in some circles - the media, universities, many big corporations - liberal norms *are* enforced to some degree, and the enforcement has probably gotten stronger in recent years.

But I don't think this explains all of the Right's obsession.

3/The stereotype is that people on the Right tend to be more threat-sensitive. That would help explain the perception that liberal norm-enforcers are lurking everywhere, ready to pounce and anathematize anyone who makes a misstep.

But I don't think that's all of it either.

4/And of course, it's always fun - whether you're on the Right or the Left, or playing a video game, or whatever - to style yourself as the brave iconoclastic rebel fighting against the oppressive forces of blah blah blah.

But I don't think this is all of it, either.

5/The reason I think it's more than these things is that even *in private*, people on the Right express their "crimethink" ideas very gingerly and hesitantly.

I get the sense that they're not just afraid of external censure, but have also internalized liberal norms.

RadioChinar
@RadioChinar

Demystifying Ghazwa-e-Hind. A #thread.

A recent video of Shoaid Akhter surfaced in social media creating a lot of controversy where the #Pakistani Cricketer can be seen suggesting invasion of India by using the term Ghazwa-e-Hind.
Radicalization of sportsmen seen off late
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Some radical Islamic preachers believes that Ghazwa-e-Hind means a “Holy War against India”. As per this irrational & profane concept, there will be a fierce battle to secure victory over #India.
#Kashmir
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#Pakistan-based terror groups, like JeM have been using Ghazwa-e-Hind as a Hadith to recruit, fund and justify its terror strikes as a religious holy war against #India.
#Kashmir
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Some machiavellian people claim it is a prophecy that Muslim warriors will wage war against the #India.
Jaish & others falsely propagate that Jihad against India is considered holy in Islam & that those participating in it will be granted an easy entry into paradise.
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However prolific scholars says that this is a made-up interpretation of some verse in The Holy Quran to mislead the gullible youth of #Pakistan into picking up arms and fighting its Army's personal battle against #India.
#Kashmir
(5/10)

Simon DeDeo
@SimonDeDeo

"I lied about my basic beliefs in order to keep a prestigious job. Now that it will be zero-cost to me, I have a few things to say."

As a dean of a major academic institution, I could not have said this. But I will now. Requiring such statements in applications for appointments and promotions is an affront to academic freedom, and diminishes the true value of diversity, equity of inclusion by trivializing it. https://t.co/NfcI5VLODi
— Jeffrey Flier (@jflier) November 10, 2018

We know that elite institutions like the one Flier was in (partial) charge of rely on irrelevant status markers like private school education, whiteness, legacy, and ability to charm an old white guy at an interview.

Harvard's discriminatory policies are becoming increasingly well known, across the political spectrum (see, e.g., the recent lawsuit on discrimination against East Asian applications.)

It's refreshing to hear a senior administrator admits to personally opposing policies that attempt to remedy these basic flaws. These are flaws that harm his institution's ability to do cutting-edge research and to serve the public.

Harvard is being eclipsed by institutions that have different ideas about how to run a 21st Century institution. Stanford, for one; the UC system; the "public Ivys".

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