Graphene paints a corrosion-free future


The surface of graphene, a one atom thick sheet of carbon, can be randomly decorated with oxygen to create graphene oxide; a form of graphene that could have a significant impact on the chemical, pharmaceutical and electronic industries. Applied as paint, it could provide an ultra-strong, non-corrosive coating for a wide range of industrial applications.
graphene

Graphene oxide solutions can be used to paint various surfaces ranging from glass to metals to even conventional bricks. After a simple chemical treatment, the resulting coatings behave like graphite in terms of chemical and thermal stability but become mechanically nearly as tough as graphene, the strongest material known to man.

The team led by Dr Rahul Nair and Nobel laureate Sir Andre Geim demonstrated previously that multilayer films made from are vacuum tight under dry conditions but, if expose to water or its vapour, act as molecular sieves allowing passage of below a certain size. Those findings could have huge implications for water purification.

This contrasting property is due to the structure of graphene oxide films that consist of millions of small flakes stacked randomly on top of each other but leave nano-sized capillaries between them. Water molecules like to be inside these nanocapillaries and can drag small atoms and molecules along.

In an article published in Nature Communications this week, the University of Manchester team shows that it is possible to tightly close those nanocapillaries using simple chemical treatments, which makes graphene films even stronger mechanically as well as completely impermeable to everything: gases, liquids or strong chemicals. For example, the researchers demonstrate that glassware or copper plates covered with graphene paint can be used as containers for strongly corrosive acids.

The exceptional barrier properties of graphene paint have already attracted interest from many companies who now collaborate with The University of Manchester on development of new protective and anticorrosion coatings.

Dr Nair said “Graphene paint has a good chance to become a truly revolutionary product for industries that deal with any kind of protection either from air, weather elements or corrosive chemicals. Those include, for example, medical, electronics and nuclear industry or even shipbuilding, to name but the few.”

Dr Yang Su, the first author in this work added: “Graphene paint can be applied to practically any material, independently of whether it’s plastic, metal or even sand. For example, plastic films coated with graphene could be of interest for medical packaging to improve shelf life because they are less permeable to air and water vapour than conventional coatings. In addition, thin layers of paint are optically transparent.”

Read more at: http://phys.org/news/2014-09-graphene-corrosion-free-future.html#jCp

World-first clinical trials for better prosthetics based on antlers


Researchers in the UK are conducting the first clinical trials in the world where they are drilling prosthetics right into the bone, instead of moulded and strapped into place.

ITAP

Image: Royal National Orthopaedic Hospital

Right now, if a patient needs a prosthetic limb fitted, one will be made with a cup-shaped end that will be moulded to the base of their arm or leg and strapped on. It’s not elegant, or secure, or comfortable. But now a team of biomedical engineers at the Royal National Orthopaedic Hospital in London has just completed the first clinical trials of a new technique that has prosthetics drilled straight into the bone.

Named ITAP (Intraosseous Transcutaneous Amputation Prostheses), this technique grafts a little anchor directly onto the bone. The major problem with this technique though, is that this foreign body, which protrudes of the skin, has a high risk of getting infected. So the team looked at deer antlers, of all things, to find a solution.

Chris Higgins at Wired explains:

“Usually, any sustained breach of the skin barrier will allow foreign bodies through to invade. Antlers are specialised bone structures that transition from the skull into external features through the skin, but do not cause any adverse effects. The key to their organic survival is tiny, porous holes in the antler bone, allowing skin to grow into it and tightly infuse with the transdermal object, creating a barrier.”

With this in mind, the team at the hospital created a porous metal anchor that can be used to attach an array of specialised prosthetic limbs directly to the bone. The initial pain of having metal drilled into the bone will be offset by the increased comfort of the better-attached limb. According to Higgins, the 20 patients who took part in the clinical trial reported a better quality of life, some even describing it as “life-changing”.

First-Ever Human Trial Of An Induced Pluripotent Stem Cell Treatment Set To Begin


High levels of physical activity linked to better academic performance in boys


A recent Finnish study shows that higher levels of physical activity are related to better academic achievement during the first three school years particularly in boys.

The study published in PLOS ONE was conducted in collaboration with the Physical Activity and Nutrition in Children (PANIC) Study conducted at the University of Eastern Finland and the First Steps Study at the University of Jyväskylä.

The study investigated the relationships of different types of and sedentary behavior assessed in the first grade to reading and in grades 1–3 among 186 Finnish children. Higher levels of physical activity at recess were related to better reading skills and participation in organized sports was linked to higher arithmetic test scores in grades 1–3. Particularly boys with higher levels of physical activity, and especially walking and bicycling to and from school, had better reading skills than less active boys. Furthermore, boys who spent more time doing activities involving reading and writing on their leisure time had better reading skills compared to boys who spent less time doing those activities. Moreover, boys with more computer and video game time achieved higher arithmetic test scores than boys with less computer and video game time.

In girls, there were only few associations of physical activity and with academic achievement when various confounding factors were controlled for.

The findings of the present study highlight the potential of physical activity during recess and participation in organized sports in the improvement of in children. Particularly boys´ school success may benefit from of physical activity and active school transportation, reading and writing as well as moderate computer and video game use.

Forget the Goggles: Chlorophyll Eye Drops Give Night Vision


What the dragonfish discovered through evolution, the U.S. military wants to apply to the battlefield.

Seeing in the dark could soon be as easy as popping a pill or squeezing some drops into your eyes, thanks to some new science, an unusual deep-sea fish, and a plant pigment.

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In the 1990s, marine biologist Ron Douglas of City University London discovered that, unlike other deep-sea fish, the dragonfish Malacosteus nigercan perceive red light. Douglas was surprised when he isolated the chemical responsible for absorbing red: It was chlorophyll. “That was weird,” he says. The fish had somehow co-opted chlorophyll, most likely from bacteria in their food, and turned it into a vision enhancer.

In 2004, Ilyas Washington, an ophthalmic scientist at Columbia University Medical Center, came across Douglas’s findings. Washington knew that the mechanisms involved in vision tend to be similar throughout the animal kingdom, so he wondered whether chlorophyll could also enhance the vision of other animals, including humans. His latest experiments in mice and rabbits suggest that administering chlorophyll to the eyes can double their ability to see in low light. The pigment absorbs hues of red light that are normally invisible in dim conditions. That information is then transmitted to the brain, allowing enhanced vision.

Washington is now developing ways to deliver chlorophyll to human eyes safely and easily, perhaps through drops. He believes that a night-vision drug would be most useful on the battlefield, so it is no surprise that the U.S. Department of Defense is funding his work. “The military would want this biological enhancement so they don’t have to carry nighttime goggles” during operations in the dark, he says.

POTASSIUM-RICH FOODS CUT STROKE, DEATH RISKS AMONG OLDER WOMEN


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Study Highlights

  • Older women who eat foods with higher amounts of potassium may be at lower risk of stroke and death than women who consume less potassium-rich foods.
  • The health benefits from potassium-rich foods are greater among older women who do not have high blood pressure.
  • Most older American women do not eat the recommended amounts of potassium from foods.

Postmenopausal women who eat foods higher in potassium are less likely to have strokes and die than women who eat less potassium-rich foods, according to new research in the American Heart Association’s journal Stroke.

“Previous studies have shown that potassium consumption may lower blood pressure. But whether potassium intake could prevent stroke or death wasn’t clear,” said Sylvia Wassertheil-Smoller, Ph.D., study senior author and distinguished university professor emerita, department of epidemiology and population health at Albert Einstein College of Medicine, Bronx, NY.

“Our findings give women another reason to eat their fruits and vegetables. Fruits and vegetables are good sources of potassium, and potassium not only lowers postmenopausal women’s risk of stroke, but also death.”

Researchers studied 90,137 postmenopausal women, ages 50 to 79, for an average 11 years. They looked at how much potassium the women consumed, as well as if they had strokes, including ischemic and hemorrhagic strokes, or died during the study period. Women in the study were stroke-free at the start and their average dietary potassium intake was 2,611 mg/day. Results of this study are based on potassium from food, not supplements.

The researchers found:

    • Women who ate the most potassium were 12 percent less likely to suffer stroke in general and 16 percent less likely to suffer an ischemic stroke than women who ate the least.
    • Women who ate the most potassium were 10 percent less likely to die than those who ate the least.
    • Among women who did not have hypertension (whose blood pressure was normal and they were not on any medications for high blood pressure),  those who ate the most potassium had a 27 percent lower ischemic stroke risk and 21 percent reduced risk for all stroke types, compared to women who ate the least potassium in their daily diets.
  • Among women with hypertension (whose blood pressure was high or they were taking drugs for high blood pressure), those who ate the most potassium had a lower risk of death, but potassium intake did not lower their stroke risk.

Researchers suggested that higher dietary potassium intake may be more beneficial before high blood pressure develops. They also said there was no evidence of any association between potassium intake and hemorrhagic stroke, which could be related to the low number of hemorrhagic strokes in the study.

The U.S. Department of Agriculture recommends that women eat at least 4,700 mg of potassium daily. “Only 2.8 percent of women in our study met or exceeded this level. The World Health Organization’s daily potassium recommendation for women is lower, at 3,510 mg or more. Still, only 16.6 percent of women we studied met or exceeded that,” said Wassertheil-Smoller.

“Our findings suggest that women need to eat more potassium-rich foods. You won’t find high potassium in junk food. Some foods high in potassium include white and sweet potatoes, bananas and white beans.”

While increasing potassium intake is probably a good idea for most older women, there are some people who have too much potassium in their blood, which can be dangerous to the heart. “People should check with their doctor about how much potassium they should eat,” she said.

The study was observational and included only postmenopausal women. Researchers also did not take sodium intake into consideration, so the potential importance of a balance between sodium and potassium is not among the findings. Researchers said more studies are needed to determine whether potassium has the same effects on men and younger people.

Psychopaths May Be Overrepresented In Big Business, Given Smarts And Manipulation Skills


The bible of psychiatric disorders, the fifth edition of the Diagnostic and Statistical Manual, known more colloquially as DSM-5, doesn’t include “psychopath” in any of its near-1,000 pages. It lists the collection of symptoms normally included in the moniker instead as “antisocial personality disorder.” And businesspeople may be more prone to having it.

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Researchers from the University of Huddersfield recently conducted a study that found an ability to mask galvanic skin responses among high-IQ individuals could indicate the presence of antisocial personality disorder, referred to in the language of this particular research as psychopathy. It’s believed a combination of cunning smarts and a knack for social manipulation could help explain why psychopathic behavior is found more often in business than in the general population.

“I thought that intelligence could be an explanation for this, and it could be a problem if there are increased numbers of psychopaths at a high level in business,” said lead researcher and psychological scientist Carolyn Bate in astatement.

Bate’s research draws upon prior findings that showed out of 203 corporate professionals, roughly three percent scored high enough on two tests of psychopathic traits to qualify as embodying psychopathy — although no formal diagnoses were made. This three percent was the fuel for Bates’ study because it stands in contrast to the general population’s rate of only one percent. Why, she wanted to know, were business people three times more likely to embody this behavior?

Her team’s study recruited 50 people to answer the question. First, each person took a standard IQ test. Then they took a second test, called the Levenson Self-Report Psychopathy Scale, to assess whether they had either Factor One or Factor Two psychopathic tendencies. Factor One tendencies include boldness and extreme assertiveness. Factor Two tendencies include poor impulse control and exploitative tendencies.

The meat of the study came next: Bate hooked each participant up to a machine that read galvanic skin response (GSR). She showed them either neutral images or ones intended to shock the average person, and she recorded how people with each set of psychopathic tendencies reacted to the shocking images. Her hypothesis, that people with higher IQ scores and psychopathic tendencies were more likely not to register a GSR, was confirmed.

The upshot, she says, isn’t all that clear. The findings may point in one direction, namely that people with psychopathic tendencies are usually smarter, but whether businesses need to change their practices to accommodate the research is debatable. On the one hand, she concedes “this could have a detrimental effect on our everyday lives,” but she also acknowledges that business has been run the same way for many years; the necessary changes could be systemic.

“Perhaps businesses do need people who have the same characteristics as psychopaths, such as ruthlessness,” she said. “But I suspect that some form of screening does need to take place, mainly so businesses are aware of what sort of people they are hiring.”

In other words, of course businesses would rather higher bulldogs. But the net effect of high-ranking managers who would just as quickly step on someone’s throat to get where they’re going certainly seems like a negative outside the office. They might not actually kill anyone to get a promotion, but, to revert back to the language of the DSM, their antisocial tendencies may kill with kindness. Or at least what looks like kindness.

Source: Bate C, Boduszek D, Dhingra K, Bale C. Psychopathy, intelligence and emotional responding in a non-forensic sample: an experimental investigation.The Journal of Forensic Psychiatry & Psychology. 2014.

The stories behind five stationery icons


Colourful paperclips

We take them for granted, but how did the paperclip, and other essential items of stationery, come about, asks James Ward.

Paperclip

The paperclip has uncertain origins. One theory that has always circulated is that it was invented by Norwegian patent clerk Johann Vaaler in 1899. His patent seems to have been for a clip made from “a spring material, such as a piece of wire, that is bent to a rectangular, triangular or otherwise shaped hoop, the end parts of which wire piece form members or tongues lying side by side in contrary directions”. But there was nothing particularly special about his design – other similar designs had already been patented years earlier. Vaaler’s title as the supposed father of the paperclip was given to him posthumously. And as the story grew, it accidentally managed to turn him into a folk hero of sorts in Norway.

Paperclip

During the years of Nazi occupation, the paperclip was worn as a symbol of resistance in Norway. This was nothing to do with Vaaler being Norwegian but it was meant as a subtle sign – the binding action of the paperclip acting as a reminder that the Norwegian people were united together against the occupying forces (“we are bound together”). In the years following the war, the belief that Vaaler had invented the clip slowly began to spread. The story started appearing in Norwegian encyclopaedias and soon merged with stories of the resistance to elevate the paperclip into something approaching a national symbol. In 1989, the BI Business School in Norway erected a 7m-tall paperclip in Vaaler’s honour. However, the statue is not actually of the same design Vaaler patented. Some tribute.

Giant paperclip statute in grounds of BI business school, NorwayThe BI business school in Norway, complete with giant paperclip

There are many types of paperclip, the most common being known as the Gem. Even in paperless offices, the paperclip lives on in the form of skeuomorphic design – attachments are added to emails using a paperclip icon and then there’s Clippy, the much-maligned Microsoft Office Assistant whose helpful suggestions were not appreciated by some. Clippy was killed off in 2007.

Pink Pearl eraser

Pink Pearl eraser

While not as common in the UK as it is in the US, the Pink Pearl eraser is still instantly recognisable. It was designed as part of Eberhard Faber’s range of Pearl pencils. A simple pink rhomboid, its distinctive colouring and soft texture were a result of the volcanic pumice mixed with the rubber and factice during the manufacturing process. Erasers are made from either natural or synthetic rubber, but the rubber itself is just used as a binding agent and typically only makes up around 10 to 20% of the eraser as a whole. Other ingredients are added, including a mixture of vegetable oil and sulphur known as factice. It is this factice which acts as the real erasing material. The eraser was launched in 1916, just as compulsory education laws were being introduced across the US.

Its low price and reliable quality meant it became a common feature in classrooms across the country. In 1967, the eraser was celebrated by the artist Vija Celmins, who produced a series of painstakingly crafted Pink Pearl sculptures from balsa wood, shaped and painted to look just like the real thing. Ten years later, Avon paid tribute to the Pink Pearl in its own unique way, producing a Pink Pearl nail brush (“Ten busy fingers after school, play and homework need a scrub-away brush to erase undernail dirt!”). The familiar bevel shape and colour of the Pink Pearl are still recognisable today in the version sold by Papermate, and the “eraser” icon in Photoshop (both in shape and colour) is clearly modelled on a Pink Pearl-type eraser. On Etsy today, crafters sell Pink Pearl magnets, Pink Pearl badges and modified Pink Pearl erasers with USB memory sticks embedded in them.

Pritt Stick

Pritt stick

In 1967, Dr Wolfgang Dierichs, a researcher working at German manufacturing company Henkel, went on a business trip. He checked in and boarded the plane. He took his seat, fastened his seatbelt and got ready for take-off. By the time the plane landed, Dierichs had an idea that would go on to revolutionise the world (of glue). At some point during the flight, he saw something that inspired him. It was a woman. The woman in question was carefully applying her lipstick, and as Dierichs watched her, he began to think that the lipstick form could have a different application.

You could take that design, a thin twistable tube, and fill it with a stick of solid glue. It would be clean and convenient. You’d just remove the lid and apply as much as you needed. No pots, no brushes, just a stick of glue. Of course, most people, seeing a woman apply lipstick wouldn’t think, “Imagine if that was glue she was smearing over her lips”, but Dierichs worked in Henkel’s sizeable adhesives division.

The company launched the Pritt Stick in 1969. Within two years, Pritt Stick was available in 38 countries around the world and today it is sold in more than 120 countries worldwide. Around 130 million Pritt Sticks are produced every year and more than 2.5 billion have been sold since the product was launched. (“Enough to leave a line of adhesive extending from the earth, past our satellite the moon, on to Mars and then all the way back again,” the company claims.) In 1987, Henkel began advertising the glue stick with a character called Mr Pritt who seems to live an ambivalent life, encouraging people to smear Pritt Sticks on paper despite being a Pritt Stick himself. He seems deeply troubled.

Drawing pin

drawing pins

As its name suggests, the “drawing pin” was originally used by draughtsmen to hold down the drawings they were working on. These pins would have had different shapes and designs, having evolved from simple straight pins. As with the development of the paperclip, there is some debate over who exactly invented the drawing pin as we know it today. Some claim the pin was invented by a German watchmaker named Johann Kirsten sometime between 1902 and 1903. One theory is that prior to this, Kirsten (like many before him, no doubt) used a simple straight pin to hold down his drawings as he worked.

Realising that a pin featuring a large, flattish head would be kinder on the thumb, he beat out a small brass disc and punched a nail through it. However, it wasn’t Kirsten who benefited from his design. While Kirsten was able to sell a small amount of the pins to other local craftsmen, he still found himself short of cash (possibly the result of his heavy drinking – he was supposed to have once ordered a carriage to take him from his house to the pub next door, while his children sat at home starving) and was forced to sell the design to factory owner Arthur Lindstedt.

With a few changes, the pin made Lindstedt a fortune, with each worker at the Lindstedt factory producing thousands of pins each day for export all over Europe while Kirsten was soon forgotten about. Well, perhaps not entirely forgotten. In 2003, Christa Kothe, owner of a small hotel just outside Lychen, paid to have a statue built to mark 100 years of the drawing pin.

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More from the Magazine

Trash icon

The pioneers of computing championed a style of design in which digital elements resembled real world objects that anyone could recognise. Behind the glass screen lay a “desktop” on which users could arrange “documents”, or drop them into the “trash” – an icon in the shape of a bin. The idea is known as “skeuomorphism”. It predates Jobs and persists to this day.

The envelope is the de-facto symbol for email and SMS messages. It offers a nice distinction between read and unread – they become opened and unopened envelopes. On Windows 7, the Sticky Notes program resembles electronic Post-it notes. Unlike the real thing, they don’t lose their stickiness and fall off your desktop.

 

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Post-it Note

post-it notes on a wall

Spence Silver joined 3M in 1966 as a senior chemist in the company’s research laboratory. The team he joined were working on developing pressure-sensitive adhesives. To work effectively, these adhesives needed to be sticky enough to stick to the surfaces being joined together, but also needed to be easy to peel apart. Working on one formula, Silver changed the amount of one of the chemicals and accidentally created a very weak but reliable adhesive.

At first glance, it seemed useless, but he wondered if it could have some kind of application somewhere. He showed it to his colleagues, and even held seminars to explain its unusual properties. Initially, he thought the adhesive could be sold in an aerosol form – to be sprayed on the back of a sheet of paper or poster to create a temporary display. Alternatively, he wondered if it would be possible to create large notice boards coated in the material, to which memos or notes could be temporarily attached.

One of the 3M employees who attended Spence Silver’s seminars on his adhesive was Art Fry. Fry worked in the company’s Tape Division and part of his role involved developing new product ideas. In his spare time, Fry was a keen member of his local choir, and a couple of evenings after hearing Silver describing his discovery, Fry found himself becoming frustrated during hymn practice. The pieces of paper he used to mark the pages in his hymn book kept falling out. He realised this low-tack adhesive could be used to hold the bookmarks in place. He showed his bookmark to his colleagues but they weren’t particularly impressed. One day, Fry was in his office preparing a report. He wanted to write a brief note for his supervisor so took one of his bookmarks and jotted down a few words on it and stuck it on the front of the report. His supervisor took another of Fry’s bookmarks and stuck it next to a paragraph that needed correcting, adding a few comments of his own. Seeing this, Fry had a “eureka, head-flapping moment” and the sticky note was born.