30 May 13:36

Overall Water Splitting Catalyzed Efficiently by an Ultrathin Nanosheet-Built, Hollow Ni3S2-Based Electrocatalyst

by Yuanyuan Wu, Guo-Dong Li, Yipu Liu, Lan Yang, Xinran Lian, Tewodros Asefa, Xiaoxin Zou

Making highly efficient catalysts for an overall ​water splitting reaction is vitally important to bring solar/electrical-to-hydrogen energy conversion processes into reality. Herein, the synthesis of ultrathin nanosheet-based, hollow MoOx/Ni3S2 composite microsphere catalysts on nickel foam, using ammonium molybdate as a precursor and the triblock copolymer pluronic P123 as a structure-directing agent is reported. It is also shown that the resulting materials can serve as bifunctional, non-noble metal electrocatalysts with high activity and stability for the hydrogen evolution reaction (HER) as well as the oxygen evolution reaction (OER). Thanks to their unique structural features, the materials give an impressive water-splitting current density of 10 mA cm−2 at ≈1.45 V with remarkable durability for >100 h when used as catalysts both at the cathode and the anode sides of an alkaline electrolyzer. This performance for an overall water splitting reaction is better than even those obtained with an electrolyzer consisting of noble metal-based Pt/C and IrOx/C catalytic couple—the benchmark catalysts for HER and OER, respectively.

Thumbnail image of graphical abstract

A novel, non-noble metal-based water splitting electrocatalyst comprising nickel foam-supported, ultrathin nanosheet-built, hollow MoOx/Ni3S2 microspheres has been synthesized. This material gives an impressive water-splitting current density of 10 mA cm−2 at ≈1.45 V with remarkable durability for >100 h when used as electrocatalysts both at the cathode and the anode sides of an alkaline electrolyzer.

30 May 05:12

Comic for May 30, 2016

Dilbert readers - Please visit Dilbert.com to read this feature. Due to changes with our feeds, we are now making this RSS feed a link to Dilbert.com.
31 May 04:01

Ruttech

by David M Willis
31 May 08:55

195. EPICTETUS: A worthy crisis

by Gav

195_Epictetus01

Epictetus (50CE-130CE) was one of the key Stoic philosophers, along with Seneca and Marcus Aurelius. Born as a slave, Epictetus was given permission by his master to study philosophy and eventually became a free man, opening up his own philosophy school in Ancient Rome. When Emperor Domitian banished all philosophers from Rome in 89 CE, Epictetus fled to Greece and continued his teachings. Although no actual writings of his survive, Epictetus’ philosophy was written and published by his student Arrian as The Enchiridion and Discourses, which can be read for free online.

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– Forgive me if updates get a bit sporadic for the next month or two, my wife and I just welcomed a new member of the family 🙂
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– Thanks to reader Matthew for submitting this quote.

30 May 13:21

The Organocatalytic Approach to Enantiopure 2H- and 3H-Pyrroles: Inhibitors of the Hedgehog Signaling Pathway

by Lisa Kötzner, Markus Leutzsch, Sonja Sievers, Sumersing Patil, Herbert Waldmann, Yiying Zheng, Walter Thiel, Benjamin List

Abstract

A divergent approach to enantioenriched 2H- and 3H-pyrroles catalyzed by a spirocyclic phosphoric acid is reported that makes use of a Fischer-type indolization and a [1,5]-alkyl shift. Catalyzed by the chiral phosphoric acid STRIP, good to excellent yields and enantioselectivities could be obtained. Remarkably, biological evaluation reveals one of these novel 2H-pyrroles to be a potent but nontoxic inhibitor of the Hedgehog signaling pathway by binding to the Smoothened protein.

Thumbnail image of graphical abstract

The versatility of pyrroles: A Fischer indolization and a [1,5]-alkyl shift were used in the title reaction to obtain enantioenriched 2H- or 3H-pyrroles. The products could be generated in good to excellent yields and enantiomeric ratios by using a chiral SPINOL-derived phosphoric acid derivative as catalyst. Biological evaluations revealed the novel 2H-pyrroles to be potent inhibitors of the Hedgehog signaling pathway.

29 May 14:00

These Packing Techniques Save Space and Let You Carry More

by Alan Henry

We’ve covered lots of ways to cram a lot of stuff in small suitcases , but this video and infographic from Expedia is full of handy packing tips to remember the next time you’re heading out on a business trip—or a well-earned vacation.

Read more...

29 May 20:40

That Tingly Feeling: Why Do Only Some People Get 'Skin Orgasms' From Listening to Music?

by Mitchell Colver, The Conversation
Many can identify with the phenomenon of feeling a thrill—followed by a chill—when listening to a particularly moving piece of music.

Have you ever been listening to a great piece of music and felt a chill run up your spine? Or goosebumps tickle your arms and shoulders?

The experience is called frisson (pronounced free-sawn), a French term meaning “aesthetic chills,” and it feels like waves of pleasure running all over your skin. Some researchers have even dubbed it a “skin orgasm.”

Listening to emotionally moving music is the most common trigger of frisson, but some feel it while looking at beautiful artwork, watching a particularly moving scene in a movie or having physical contact with another person. Studies have shown that roughly two-thirds of the population feels frisson, and frisson-loving Reddit users have even created a page to share their favorite frisson-causing media.

But why do some people experience frisson and not others?

Working in the lab of Dr. Amani El-Alayli, a professor of Social Psychology at Eastern Washington University, I decided to find out.

What causes a thrill, followed by a chill?

While scientists are still unlocking the secrets of this phenomenon, a large body of research over the past five decades has traced the origins of frisson to how we emotionally react to unexpected stimuli in our environment, particularly music.

Musical passages that include unexpected harmonies, sudden changes in volume or the moving entrance of a soloist are particularly common triggers for frisson because they violate listeners’ expectations in a positive way, similar to what occurred during the 2009 debut performance of the unassuming Susan Boyle on “Britain’s Got Talent.”

'You didn't expect that, did you?"

If a violin soloist is playing a particularly moving passage that builds up to a beautiful high note, the listener might find this climactic moment emotionally charged, and feel a thrill from witnessing the successful execution of such a difficult piece.

But science is still trying to catch up with why this thrill results in goosebumps in the first place.

Some scientists have suggested that goosebumps are an evolutionary holdover from our early (hairier) ancestors, who kept themselves warm through an endothermic layer of heat that they retained immediately beneath the hairs of their skin. Experiencing goosebumps after a rapid change in temperature (like being exposed to an unexpectedly cool breeze on a sunny day) temporarily raises and then lowers those hairs, resetting this layer of warmth.

Why do a song and a cool breeze produce the same physiological response? EverJean/flickrCC BY

Since we invented clothing, humans have had less of a need for this endothermic layer of heat. But the physiological structure is still in place, and it may have been rewired to produce aesthetic chills as a reaction to emotionally moving stimuli, like great beauty in art or nature.

Research regarding the prevalence of frisson has varied widely, with studies showing anywhere between 55 percent and 86 percent of the population being able to experience the effect.

Monitoring how the skin responds to music

We predicted that if a person were more cognitively immersed in a piece of music, then he or she might be more likely to experience frisson as a result of paying closer attention to the stimuli. And we suspected that whether or not someone would become cognitively immersed in a piece of music in the first place would be a result of his or her personality type.

To test this hypothesis, participants were brought into the lab and wired up to an instrument that measures galvanic skin response, a measure of how the electrical resistance of people’s skin changes when they become physiologically aroused.

Participants were then invited to listen to several pieces of music as lab assistants monitored their responses to the music in real time.

Examples of pieces used in the study include:

Each of these pieces contains at least one thrilling moment that is known to cause frisson in listeners (several have been used in previous studies). For example, in the Bach piece, the tension built up by the orchestra during the first 80 seconds is finally released by the entrance of the choir—a particularly charged moment that’s likely to elicit frisson.

As participants listened to these pieces of music, lab assistants asked them to report their experiences of frisson by pressing a small button, which created a temporal log of each listening session.

By comparing these data to the physiological measures and to a personality test that the participants had completed, we were, for the first time, able to draw some unique conclusions about why frisson might be happening more often for some listeners than for others.

This graph shows the reactions of one listener in the lab. The peaks of each line represent moments when the participant was particularly cognitively or emotionally aroused by the music. In this case, each of these peaks of excitement coincided with the participant reporting experiencing frisson in reaction to the music. This participant scored high on a personality trait called ‘Openness to Experience.’ (Author provided)

The role of personality

Results from the personality test showed that the listeners who experienced frisson also scored high for a personality trait called Openness to Experience.

Studies have shown that people who possess this trait have unusually active imaginations, appreciate beauty and nature, seek out new experiences, often reflect deeply on their feelings, and love variety in life.

Some aspects of this trait are inherently emotional (loving variety, appreciating beauty), and others are cognitive (imagination, intellectual curiosity).

While previous research had connected Openness to Experience with frisson, most researchers had concluded that listeners were experiencing frisson as a result of a deeply emotional reaction they were having to the music.

In contrast, the results of our study show that it’s the cognitive components of “Openness to Experience” – such as making mental predictions about how the music is going to unfold or engaging in musical imagery (a way of processing music that combines listening with daydreaming) – that are associated with frisson to a greater degree than the emotional components.

These findings, recently published in the journal Psychology of Music, indicate that those who intellectually immerse themselves in music (rather than just letting it flow over them) might experience frisson more often and more intensely than others.

And if you’re one of the lucky people who can feel frisson, the frisson Reddit group has identified Lady Gaga’s rendition of the Star-Spangled Banner at the 2016 Super Bowl and a fan-made trailer for the original Star Wars trilogy as especially chill-inducing.

 

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30 May 13:11

Improving the Stability and Performance of Perovskite Light-Emitting Diodes by Thermal Annealing Treatment

by Jae Choul Yu, Dae Woo Kim, Da Bin Kim, Eui Dae Jung, Jong Hyun Park, Ah-Young Lee, Bo Ram Lee, Daniele Di Nuzzo, Richard H. Friend, Myoung Hoon Song
Thumbnail image of graphical abstract

A perovskite LED with a perovskite film treated under optimum thermal annealing conditions exhibited a significantly enhanced long-term stability with full coverage of the green electroluminescence emission due to the highly uniform morphology of the perovskite film.

30 May 09:26

Selective Catalytic Synthesis Using the Combination of Carbon Dioxide and Hydrogen: Catalytic Chess at the Interface of Energy and Chemistry

by Jürgen Klankermayer, Sebastian Wesselbaum, Kassem Beydoun, Walter Leitner

Abstract

The present Review highlights the challenges and opportunities when using the combination CO2/H2 as a C1 synthon in catalytic reactions and processes. The transformations are classified according to the reduction level and the bond-forming processes, covering the value chain from high volume basic chemicals to complex molecules, including biologically active substances. Whereas some of these concepts can facilitate the transition of the energy system by harvesting renewable energy into chemical products, others provide options to reduce the environmental impact of chemical production already in today's petrochemical-based industry. Interdisciplinary fundamental research from chemists and chemical engineers can make important contributions to sustainable development at the interface of the energetic and chemical value chain. The present Review invites the reader to enjoy this exciting area of “catalytic chess” and maybe even to start playing some games in her or his laboratory.

Thumbnail image of graphical abstract

The catalytic gambit: The combined use of CO2 and H2 as building blocks in catalytic processes provides access to products ranging from large volume base chemicals to highly functionalized complex molecules. The current state-of-the-art is critically reviewed, highlighting pathways that are in line with “green chemistry” principles and offer the potential to harness renewable energy into the chemical value chain.

30 May 13:21

Electrochemical C−H/N−H Functionalization for the Synthesis of Highly Functionalized (Aza)indoles

by Zhong-Wei Hou, Zhong-Yi Mao, Huai-Bo Zhao, Yared Yohannes Melcamu, Xin Lu, Jinshuai Song, Hai-Chao Xu

Abstract

Indoles and azaindoles are among the most important heterocycles because of their prevalence in nature and their broad utility in pharmaceutical industry. Reported herein is an unprecedented noble-metal- and oxidant-free electrochemical method for the coupling of (hetero)arylamines with tethered alkynes to synthesize highly functionalized indoles, as well as the more challenging azaindoles.

Thumbnail image of graphical abstract

It's electric: An electrochemical coupling of (hetero)arylamines with tethered alkynes has been developed and provides highly chemo- and regioselective access to densely functionalized indoles and azaindoles. The electrochemical reaction employs ferrocene ([Cp2Fe]), an inexpensive organometallic reagent, as the redox catalyst and produces H2 as the only theoretical byproduct.

30 May 07:33

Comic: On Demand

by Tycho@penny-arcade.com (Tycho)
New Comic: On Demand
30 May 09:26

Molecularly Imprinted Polymer Coated Quantum Dots for Multiplexed Cell Targeting and Imaging

by Maria Panagiotopoulou, Yolanda Salinas, Selim Beyazit, Stephanie Kunath, Luminita Duma, Elise Prost, Andrew G. Mayes, Marina Resmini, Bernadette Tse Sum Bui, Karsten Haupt

Abstract

Advanced tools for cell imaging are of great interest for the detection, localization, and quantification of molecular biomarkers of cancer or infection. We describe a novel photopolymerization method to coat quantum dots (QDs) with polymer shells, in particular, molecularly imprinted polymers (MIPs), by using the visible light emitted from QDs excited by UV light. Fluorescent core–shell particles specifically recognizing glucuronic acid (GlcA) or N-acetylneuraminic acid (NANA) were prepared. Simultaneous multiplexed labeling of human keratinocytes with green QDs conjugated with MIP-GlcA and red QDs conjugated with MIP-NANA was demonstrated by fluorescence imaging. The specificity of binding was verified with a non-imprinted control polymer and by enzymatic cleavage of the terminal GlcA and NANA moieties. The coating strategy is potentially a generic method for the functionalization of QDs to address a much wider range of biocompatibility and biorecognition issues.

Thumbnail image of graphical abstract

Labels to tell them apart: The visible light emitted from quantum dots excited by UV light was used to photopolymerize a molecularly imprinted polymer (MIP) shell around the QDs. The use of different quantum dots with MIP shells that recognize glucuronic acid (green) or N-acetylneuraminic acid (red) enabled the multiplexed labeling and imaging of keratinocytes. The labels could be differentiated and quantified on and in the cells.

29 May 07:30

Upcoming OS/2 Release Will Be Called ArcaOS 5.0

by EditorDavid
At the annual convention of OS/2 users, Arca Noae announced their new OS/2-OEM distribution will be released in the fourth quarter of 2016, and the project, codenamed "Blue Lion", will officially be called ArcaOS 5.0. "The significance of the version number relates to IBM OS/2 4.52 -- the last maintenance release of the platform released by IBM in 2001," reports TechRepublic. martiniturbide writes: The article discusses the features of ArcaOS like USB bootable installer, USB (1.1 and 2) , ACPI, AHCI, and network card drivers, new OS installer, etc. It will be sold in two editions: ArcaOS Commercial Edition [with 12 months of priority support and updates] and ArcaOS Personal Edition... Anyone have fond members of OS/2? Are there any Slashdot readers who are still using it?

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Read more of this story at Slashdot.

30 May 04:38

Girls With Slingshots - GWS Chaser #320

by tech@thehiveworks.com
New comic!
Today's News:

Smoothest Hazel Smoothness Part II.

http://www.girlswithslingshots.com//comic/gws320">Here's the old one!

31 May 11:30

All the Roku Secret Commands and Menus In One Graphic

by Alan Henry

Reader Gardner passed along this infographic he made that lists off all of the quick ways to get into the Roku’s many secret menus—menus that let you calibrate the image, tweak network settings, even access developer options. Get ready, we’re about to void your warranty.

Read more...

30 May 04:49

Looks Could Kill

Norrin wrote this comic. Maybe the monsters always looked like that, and carpenters thought they were so cool-looking they started designing treasure chests to look like them. Really makes you think???


COOL LAST-MINUTE ANNOUNCEMENT BECAUSE MY LIFE IS IN SHAMBLES: I will be at A-Kon in Texas next weekend! Please stop by and say hello and be my friend!!
31 May 16:29

How I Broke My Worst Habit

by Joanna Goddard

Dior Nail Glow

For most of my life, I bit my nails. It was such a gross habit, but I’d always end up biting them while reading or watching TV at night, maybe as a way to deal with stress or restlessness.… Read more

The post How I Broke My Worst Habit appeared first on A Cup of Jo.

30 May 04:01

987

by Lar deSouza

lfg3603-987-may30-16

The post 987 appeared first on Looking For Group.

30 May 13:20

A Selective C−H Deprotonation Strategy to Access Functionalized Arynes by Using Hypervalent Iodine

by Sunil K. Sundalam, Aleksandra Nilova, Thomas L. Seidl, David R. Stuart

Abstract

Described here is an efficient method to access highly functionalized arynes from unsymmetrical aryl(mesityl)iodonium tosylate salts. The iodonium salts are prepared in a single pot from either commercially available aryl iodides or arylboronic acids. The aryne intermediates are generated by ortho-C−H deprotonation of aryl(mesityl)iodonium salt with a commercially available amide base and trapped in a cycloaddition reaction with furan in moderate to good yields. Coupling partners for the aryne intermediates beyond furan are also described, including benzyl azide and alicyclic amine nucleophiles. The regio- and chemoselectivity of this reaction is discussed and evidence for the spectator aryl ligand of the iodonium salt as a critical control element in selectivity is presented.

Thumbnail image of graphical abstract

Strategy planning: Unsymmetrical aryl(mesityl)iodonium salts as novel aryne precursors are efficiently prepared in one-pot reactions from aryl iodides and arylboronic acids and facilitate the generation of elaborate aryne intermediates with high regio- and chemoselectivity. The transient arynes react in cycloaddition reactions with furan and azide and in nucleophilic addition reactions with alicyclic amines.

30 May 13:21

Stabilizing a Platinum1 Single-Atom Catalyst on Supported Phosphomolybdic Acid without Compromising Hydrogenation Activity

by Bin Zhang, Hiroyuki Asakura, Jia Zhang, Jiaguang Zhang, Sudipta De, Ning Yan

Abstract

In coordination chemistry, catalytically active metal complexes in a zero- or low-valent state often adopt four-coordinate square-planar or tetrahedral geometry. By applying this principle, we have developed a stable Pt1 single-atom catalyst with a high Pt loading (close to 1 wt %) on phosphomolybdic acid(PMA)-modified active carbon. This was achieved by anchoring Pt on the four-fold hollow sites on PMA. Each Pt atom is stabilized by four oxygen atoms in a distorted square-planar geometry, with Pt slightly protruding from the oxygen planar surface. Pt is positively charged, absorbs hydrogen easily, and exhibits excellent performance in the hydrogenation of nitrobenzene and cyclohexanone. It is likely that the system described here can be extended to a number of stable SACs with superior catalytic activities.

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An atomically dispersed Pt1 catalyst has been developed with a high catalyst loading where each Pt atom is anchored on supported phosphomolybdic acid with distorted square-planar coordination geometry. The catalyst is highly active for nitrobenzene and cyclohexanone hydrogenation.

29 May 10:56

英国发现二战时期希特勒绝密情报发送机

二战期间,希特勒与德国将领交换绝密情报的罗伦兹型号电传打字机的一部分在英格兰埃塞克斯的一个小木棚内发现。
31 May 14:59

Order of the Stick 1038: Goblin to Goblin

http://www.GiantITP.com/comics/oots1038.html
30 May 18:00

Casa Farellones in Chile

by Daniella

Située sur la rivière Mapocho, dans la région de Las Condes à Santiago au Chili, la Casa Farellones est une villa à flanc de coteau toute en transparence, offrant une vue imprenable sur la Paloma et le cratère de El Altar. Un design signé Max Núñez Arquitectos.
Photographie par James Silverman.

30 May 16:42

Ctrl+Alt+Del: Analog and D-Pad 04.00

by tim@cad-comic.com (Tim Buckley)
31 May 16:22

Bryan Singer Says He’s ‘Very Desperate’ To Take A Break From The ‘X-Men’ Franchise

by Nathan Birch
gammasquadxmensinger

Getty Image

Bryan Singer has been stuck at Xavier’s School for Gifted Youngsters for a long time. Since 2000, Singer has directed four X-Men movies, and lately he’s discussed bringing back the original X-Men cast for one more movie and taking another crack at the Dark Phoenix Saga. The general impression given is that he plans to continue right on with the series after X-Men: Apocalypse. Or does he?

In a recent interview with the Los Angeles Times, the director was, well, singing a different tune. It seems the poor guy is actually downright desperate to get off the X-Men treadmill:

“The reality is, even though I’m very desperate to jump to something completely different, I’ve spent so many years in this universe and I love this cast and the characters so much, I just don’t see myself abandoning them forever. Perhaps as a consultant, as a producer, even as a director, I could see myself returning in the future. Just right now, once this one is done, I’d like to do something really different.”

The X-Men series has had mixed success without Singer behind the camera. Brett Ratner’s X-Men: The Last Stand was aggressively mediocre, but Matthew Vaughn’s X-Men: First Class was arguably the series’ best. Given the lukewarm critical response to X-Men: Apocalypse, it definitely seems like Singer could use a break to recharge his mutant batteries.

So, speculation time — if Singer does step away, who would you like to see take the reigns of the next X-Men movie?

(Via the Los Angeles Times)