Article in ACS Nano honored for most valuable contribution to ceramics

Public release date: 25-Jun-2013
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Contact: Michael Bernstein
m_bernstein@acs.org
202-872-6042
American Chemical Society

A scientific research paper published in ACS Nano has been selected as recipient of a prestigious award from the American Ceramic Society (ACerS). ACS Nano is one of more than 40 peer-reviewed journals published by the American Chemical Society, the world's largest scientific society.

ACerS' Ross Coffin Purdy Award will recognize the article, which was the first to describe a facile method to produce a large family of two-dimensional layered, early transition metal carbides and nitrides, labeled MXenes. The latter are so-called because they are produced by selective etching of the A-group element aluminum in this case from an even larger family of layered solids labeled the MAX phases. The MAX phases were in turn discovered by Michel Barsoum, Ph.D., and co-workers roughly 15 years ago at Drexel University.

Barsoum, A.W. Grosvenor and Distinguished Professor at Drexel University, and Distinguished University Professor and Trustee Chair Yury Gogotsi, Ph.D., also from Drexel Materials, were co-authors of the award-winning paper, along with students Michael Naguib, Olha Mashtalir and Joshua Carle, together with collaborators from Linkoping University in Sweden.

The annual Ross Coffin Purdy Award recognizes researchers "judged to have made the most valuable contribution to ceramic technical literature." The ACerS board unanimously agreed to grant the honor to the Barsoum and Gogotsi team's work. The award will be presented in October during the Materials Science and Technology Conference in Montral, Canada.

MXenes have potential uses in a broad range of energy and electronics applications, including lithium-ion batteries and supercapacitors. The materials' layered structure resembles that of graphene hence the suffix ene a two-dimensional sheet of carbon, but its chemistry is more complex and more versatile.

"The research reported in this paper is an exciting advance in this new family of materials for which the applications are just beginning to be envisioned," said Dawn Bonnell, Ph.D., Trustee Chair Professor in the Materials Science Department of the University of Pennsylvania and director of the Nano/Bio Interface Center. Bonnell nominated Barsoum's group for the honor.

In their ACS Nano paper "Two-Dimensional Transition Metal Carbides," the authors acknowledge funding from the Assistant Secretary for Energy Efficiency and Renewable Energy Office of Vehicle Technologies of the U.S. Department of Energy, the Commonwealth of Pennsylvania's Ben Franklin Technology Development Authority and the Alexander von Humboldt Foundation.

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Public release date: 25-Jun-2013
[ | E-mail | Share ]

Contact: Michael Bernstein
m_bernstein@acs.org
202-872-6042
American Chemical Society

A scientific research paper published in ACS Nano has been selected as recipient of a prestigious award from the American Ceramic Society (ACerS). ACS Nano is one of more than 40 peer-reviewed journals published by the American Chemical Society, the world's largest scientific society.

ACerS' Ross Coffin Purdy Award will recognize the article, which was the first to describe a facile method to produce a large family of two-dimensional layered, early transition metal carbides and nitrides, labeled MXenes. The latter are so-called because they are produced by selective etching of the A-group element aluminum in this case from an even larger family of layered solids labeled the MAX phases. The MAX phases were in turn discovered by Michel Barsoum, Ph.D., and co-workers roughly 15 years ago at Drexel University.

Barsoum, A.W. Grosvenor and Distinguished Professor at Drexel University, and Distinguished University Professor and Trustee Chair Yury Gogotsi, Ph.D., also from Drexel Materials, were co-authors of the award-winning paper, along with students Michael Naguib, Olha Mashtalir and Joshua Carle, together with collaborators from Linkoping University in Sweden.

The annual Ross Coffin Purdy Award recognizes researchers "judged to have made the most valuable contribution to ceramic technical literature." The ACerS board unanimously agreed to grant the honor to the Barsoum and Gogotsi team's work. The award will be presented in October during the Materials Science and Technology Conference in Montral, Canada.

MXenes have potential uses in a broad range of energy and electronics applications, including lithium-ion batteries and supercapacitors. The materials' layered structure resembles that of graphene hence the suffix ene a two-dimensional sheet of carbon, but its chemistry is more complex and more versatile.

"The research reported in this paper is an exciting advance in this new family of materials for which the applications are just beginning to be envisioned," said Dawn Bonnell, Ph.D., Trustee Chair Professor in the Materials Science Department of the University of Pennsylvania and director of the Nano/Bio Interface Center. Bonnell nominated Barsoum's group for the honor.

In their ACS Nano paper "Two-Dimensional Transition Metal Carbides," the authors acknowledge funding from the Assistant Secretary for Energy Efficiency and Renewable Energy Office of Vehicle Technologies of the U.S. Department of Energy, the Commonwealth of Pennsylvania's Ben Franklin Technology Development Authority and the Alexander von Humboldt Foundation.

###

The American Chemical Society is a nonprofit organization chartered by the U.S. Congress. With more than 163,000 members, ACS is the world's largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.

To automatically receive news releases from the American Chemical Society, contact newsroom@acs.org.

Follow us: Twitter Facebook

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[ | E-mail | Share ]

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AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.

Source: http://www.eurekalert.org/pub_releases/2013-06/acs-aia062513.php

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Exercise benefits patients with type 2 diabetes

June 25, 2013 ? Moderate-intensity exercise reduces fat stored around the heart, in the liver and in the abdomen of people with type 2 diabetes mellitus, even in the absence of any changes in diet, according to a new study published online in the journal Radiology.

Type 2 diabetes occurs when the body does not produce enough insulin, a hormone that regulates the movement of sugar into the cells, or when the cells resist the effects of insulin. The disease can lead to a wide range of complications, including damage to the eyes and kidneys and hardening of the arteries.

Exercise is recommended for people with diabetes, but its effects on different fat deposits in the body are unclear, according to the study's senior author, Hildo J. Lamb, M.D., Ph.D., from the Department of Radiology at Leiden University Medical Center in the Netherlands.

"Based on previous studies, we noticed that different fat deposits in the body show a differential response to dietary or medical intervention," he said. "Metabolic and other effects of exercise are hard to investigate, because usually an exercise program is accompanied by changes in lifestyle and diet."

For the new study, Dr. Lamb and colleagues assessed the effects of exercise on organ-specific fat accumulation and cardiac function in type 2 diabetes patients, independent of any other lifestyle or dietary changes. The 12 patients, average age 46 years, underwent MRI examinations before and after six months of moderate-intensity exercise totaling between 3.5 and six hours per week and featuring two endurance and two resistance training sessions. The exercise cycle culminated with a 12-day trekking expedition.

MRI results showed that, although cardiac function was not affected, the exercise program led to a significant decrease in fat volume in the abdomen, liver and around the heart, all of which have been previously shown to be associated with increased cardiovascular risk.

"In the present study we observed that the second layer of fat around the heart, the peracardial fat, behaved similarly in response to exercise training as intra-abdominal, or visceral fat," Dr. Lamb said. "The fat content in the liver also decreased substantially after exercise."

Dr. Lamb noted that the exercise-induced fat reductions in the liver are of particular importance to people with type 2 diabetes, many of whom are overweight or obese.

"The liver plays a central role in regulating total body fat distribution," he said. "Therefore, reduction of liver fat content and visceral fat volume by physical exercise are very important to reverse the adverse effects of lipid accumulation elsewhere, such as the heart and arterial vessel wall."

The findings point to an important role for imaging in identifying appropriate treatment for patients with type 2 diabetes, which the World Health Organization projects to be the seventh leading cause of death worldwide by 2030.

"In the future, we hope to be able to use advanced imaging techniques to predict in individual patients which therapeutic strategy is most effective: diet, medication, exercise, surgery or certain combinations," Dr. Lamb said.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/health_medicine/nutrition/~3/9a11kQoMo3I/130625074139.htm

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PFT: Romo says he doesn't hear legion of critics

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When NFL Commissioner Roger Goodell was asked about the Redskins? name during this year?s pre-Super Bowl press conference, his off-the-cuff response was, ?I don?t think anybody wants to offend anybody.?? With the benefit of time to reflect on a written reply to a recent letter from 10 members of Congress, Goodell was more articulate and detailed.? And also surprisingly candid.

Goodell?s letter, a copy of which can be seen here, begins with an explanation of the origins of the label.

?As you may know,? Goodell writes, ?the team began as the Boston Braves in 1932, a name that honored the courage and heritage of Native Americans.? The following year, the name was changed to the Redskins ? in part to avoid confusion with the Boston baseball team of the same name, but also to honor the team?s then-head coach, William ?Lone Star? Dietz.? Neither in intent nor use was the name ever meant to denigrate Native Americans or offend any group.?

Goodell then argues that, because the name began with positive intentions, its meaning is ?distinct from any disparagement that could be viewed in some other context.?? And so, he explains, ?For the team?s millions of fans and customers, who represent one of America?s most ethnically and geographically diverse fan bases, the name is a unifying force that stands for strength, courage, pride and respect.?

Still, Goodell concedes that the ?issues raised with respect to the Washington Redskins name are complex,? and he points out that the NFL ?respect[s] that reasonable people may view it differently, particularly over time.?

In our view, it?s a delicate way of acknowledging that, at some point in time, the superficially negative connotations of the term ?Redskins? will outweigh the positive (or at least non-negative) intentions.? A lot of things that were acceptable in 1932 are no longer deemed appropriate, regardless of original or current intent.? At some point in the future, the reasonable minds that see the term as unacceptable likely will outweigh those that don?t.

The fact that the letter wasn?t publicized by the NFL when sent to Congress on June 5 reflects, in our view, a subtle understanding that there?s no good way out of this corn maze.? (Or, in this specific context, maize maze.)

The reaction from at least one of member of Congress has been loud and pointed.? Eni Faleomavaega (D-American Samoa) took to the floor of the House of Representatives on Tuesday to complain about Goodell?s response.

?Whether good intentioned or not, the ?R? word is a racial slur akin to the ?N? word among African Americans, or the ?W? word among Latin Americans,? Faleomavaega said.

?Goodell has completely missed the point,? Faleomaveaga added.? ?It is time for the NFL to stop making excuses for itself and fully embrace its so-called commitment to diversity.?

Betty McCollum (D-Minn.) chided Goodell?s response as demonstrating ?twisted logic,? and she called it a ?statement of absurdity.?

?Goodell?s letter is another attempt to justify a racial slur on behalf of [Redskins owner] Dan Snyder and other NFL owners who appear to be only concerned with earning ever larger profits, even if it means exploiting a racist stereotype of Native Americans,? McCollum said.

?Would Roger Goodell and Dan Snyder actually travel to a Native American community and greet a group of tribal leaders by saying, ?Hey, what?s up, Redskin?? I think not. . . .? Indian children, families and elders are Americans, and just like all racial, ethnic or religious groups, they deserve to be treated with respect and dignity, not as a demeaning caricature or mascot. ?That shouldn?t be too much to ask of the NFL.?

Of course, Goodell and Snyder also wouldn?t say, ?What?s up, Chief?? or ?What?s up, Seminole?? or ?What?s up, Brave??? Still, those words ? Chief, Seminole, Brave ? when removed from the context of a team name and regarded in isolation aren?t objectively objectionable.? Redskin, when stripped from the football team and regarded as simply a word, carries a distinct know-it-when-you-see-it label of racism.

That?s the simple reality.? Fans and defenders tie the name to the team and the team to the name and see nothing problematic about it.? Or, for some fans and defenders, they realize that they need to outwardly claim there?s nothing problematic about it.

Goodell?s letter acknowledges in know-it-when-you-see-it fashion that he knows the day will come when the NFL sees the name changed.? It may not happen for 50 years or more, but eventually it will happen.

And then, for the next 50 years or more, people who wanted to see the name remain the same will complain that it shouldn?t have changed.

So, basically, get used to this controversy.? It?s officially one of the subplots of America?s ultimate reality show, and it could be lingering for longer than the NFL already has existed.

Source: http://profootballtalk.nbcsports.com/2013/06/12/criticism-doesnt-matter-to-tony-romo/related/

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