Separating gases using a rigid polymer sieve

Public release date: 17-Jan-2013
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Contact: Victoria Dando
dandov2@cardiff.ac.uk
44-292-087-9074
Cardiff University

More efficient gas separations can be achieved using a new polymer that selectively sieves gas molecules

Gas separation is crucial for many industrial processes including obtaining nitrogen or oxygen from air and purifying natural gas or hydrogen. Currently, the most energy efficient method for separating gases involves polymer membranes, however, most polymers either let gases pass through slowly (i.e. have low permeability) or are not selective towards one gas over another. Gas separation would be cheaper and use less energy if polymer membranes could be made both highly permeable and selective.

A team from the University's School of Chemistry reports in the journal Science a new polymer that efficiently separates gas mixtures based on the different sizes of the gas molecules. The polymer's molecular structure is very contorted so that it cannot fill space efficiently, therefore leaving gaps for small gas molecules to move through quickly. However, the transport of larger gas molecules is hindered by the polymer's extreme rigidity so that it acts as an efficient molecular sieve.

The Cardiff's team's collaborators at the Institute on Membrane Technology, ITM-CNR, Italy, confirmed that membranes prepared from the polymer are both highly permeable to gases and demonstrate remarkable selectivity for smaller gases such as hydrogen or oxygen over larger gases such as nitrogen or methane.

Professor Neil McKeown, a member of the School of Chemistry's team behind the research said: "The preparation of this highly rigid and contorted polymer required us to develop a new polymerisation reaction. In fact we used some very old chemistry the formation of Trger's base, which is a compound that was first prepared 125 years ago. This simple chemistry allows us to prepare highly rigid ladder polymers of high molecular mass from readily available starting materials. In addition to making polymers for efficient gas separation membranes, we anticipate that this new process will be useful for preparing polymers for a variety of different applications".

Cardiff University has applied for a patent covering this new polymerisation process.

###

Notes to editors

Cardiff University is recognised in independent government assessments as one of Britain's leading teaching and research universities and is a member of the Russell Group of the UK's most research intensive universities. Among its academic staff are two Nobel Laureates, including the winner of the 2007 Nobel Prize for Medicine, University President Professor Sir Martin Evans.

Founded by Royal Charter in 1883, today the University combines impressive modern facilities and a dynamic approach to teaching and research. The University's breadth of expertise in research and research-led teaching encompasses: the humanities; the natural, physical, health, life and social sciences; engineering and technology; preparation for a wide range of professions; and a longstanding commitment to lifelong learning. Three major new Research Institutes, offering radical new approaches to neurosciences and mental health, cancer stem cells and sustainable places were announced by the University in 2010. www.cardiff.ac.uk

For further information: Victoria Dando, Public Relations, Cardiff University, Tel: 02920 879074; email: dandov2@cardiff.ac.uk

---

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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.

Public release date: 17-Jan-2013
[ | E-mail | Share ]

Contact: Victoria Dando
dandov2@cardiff.ac.uk
44-292-087-9074
Cardiff University

More efficient gas separations can be achieved using a new polymer that selectively sieves gas molecules

Gas separation is crucial for many industrial processes including obtaining nitrogen or oxygen from air and purifying natural gas or hydrogen. Currently, the most energy efficient method for separating gases involves polymer membranes, however, most polymers either let gases pass through slowly (i.e. have low permeability) or are not selective towards one gas over another. Gas separation would be cheaper and use less energy if polymer membranes could be made both highly permeable and selective.

A team from the University's School of Chemistry reports in the journal Science a new polymer that efficiently separates gas mixtures based on the different sizes of the gas molecules. The polymer's molecular structure is very contorted so that it cannot fill space efficiently, therefore leaving gaps for small gas molecules to move through quickly. However, the transport of larger gas molecules is hindered by the polymer's extreme rigidity so that it acts as an efficient molecular sieve.

The Cardiff's team's collaborators at the Institute on Membrane Technology, ITM-CNR, Italy, confirmed that membranes prepared from the polymer are both highly permeable to gases and demonstrate remarkable selectivity for smaller gases such as hydrogen or oxygen over larger gases such as nitrogen or methane.

Professor Neil McKeown, a member of the School of Chemistry's team behind the research said: "The preparation of this highly rigid and contorted polymer required us to develop a new polymerisation reaction. In fact we used some very old chemistry the formation of Trger's base, which is a compound that was first prepared 125 years ago. This simple chemistry allows us to prepare highly rigid ladder polymers of high molecular mass from readily available starting materials. In addition to making polymers for efficient gas separation membranes, we anticipate that this new process will be useful for preparing polymers for a variety of different applications".

Cardiff University has applied for a patent covering this new polymerisation process.

###

Notes to editors

Cardiff University is recognised in independent government assessments as one of Britain's leading teaching and research universities and is a member of the Russell Group of the UK's most research intensive universities. Among its academic staff are two Nobel Laureates, including the winner of the 2007 Nobel Prize for Medicine, University President Professor Sir Martin Evans.

Founded by Royal Charter in 1883, today the University combines impressive modern facilities and a dynamic approach to teaching and research. The University's breadth of expertise in research and research-led teaching encompasses: the humanities; the natural, physical, health, life and social sciences; engineering and technology; preparation for a wide range of professions; and a longstanding commitment to lifelong learning. Three major new Research Institutes, offering radical new approaches to neurosciences and mental health, cancer stem cells and sustainable places were announced by the University in 2010. www.cardiff.ac.uk

For further information: Victoria Dando, Public Relations, Cardiff University, Tel: 02920 879074; email: dandov2@cardiff.ac.uk

---

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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/2013-01/cu-sg011713.php

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Lola's Bohemian Rain: marriage and baby: not for the weak, part I

This post will be the first of a four post series so stay tuned?



Hi, I'm Alexa and I'm a recovering addict. My drug of choice was...relationships, and I was addicted to them and rarely without one?for most of my 20's. A few times I was even offered something more potent than a relationship?a marriage proposal. But that was always the point when I'd cut off emotionally and walk away. So when Alex, my now-husband, proposed, I had no idea what I was about to go through in actually accepting and wanting to get married. And what happened was that I lost my shit.


*****

Our relationship was fast-moving and fiercely passionate from the start. There was very little inhibition or caution. Both of us had some pretty sizable wounds from past relationships, but we were two similar souls, with flames burning so brightly that it was impossible to see the darkness that did indeed lurk in our depths. Nothing was going to stop us from having the kind of love we had held out for as lifelong romantics and dreamers.?

We were consumed by and with one another. We never tired of each other's presence, spending nearly all of our free time together. We were lovers, buddies, road trip warriors, music makers and enthusiasts, adventurers, talk-until-the-sun-comes-up-a-la-sal-and-dean-from-on-the-road kind of crazy 20-somethings. We loved intensely, and we fought intensely?.our suppressed pasts spilling out into the open as we navigated the many phases of our relationship?acquaintances, dating, love, long-distance relationship, cohabitation. We had never felt so vulnerable and exposed, and we were terrified. But, we kept going.



I had survived past relationships with hefty doses of suppression, denial, and dishonesty. Sure, there were the occasional blow-ups that mostly looked like me trying (and failing) to explain the pain I was feeling so intensely, sobbing uncontrollably, and then the inevitable stand-off that would last anywhere from a few hours to a few days?.to a few weeks in the later part of my dating history. In comparison to the version of myself that I would uncover once I started dating Alex, the old me was quite adept at swallowing her emotions and making sure no one, not even herself, was privy to their whereabouts.

I had never experienced something as wild, tumultuous or expressive as I experienced with Alex.?The first few months were your standard bliss-fest and arguments seemed so impossible to imagine ever happening (remember those conversations you had when you first started dating someone like, "I can't imagine ever fighting with you? I mean what in the world would we have to fight about?!?.um, EVERYTHING). The bliss quickly melted into a real relationship, but our spark was unendingly ablaze. Reality was no match for our crazy kind of love. And so, that December, on our one-year anniversary, Alex asked me to marry him.?It was the single-most perfect moment of my life.

With the exception of a ring on my finger and conversations about wedding plans, everything felt the same...until it didn't.

I had been so restrained, so closed-up and controlled before Alex. Occasionally, I would fall to pieces while alone, but mostly I spent my time keeping it together so the world outside would not see the mess that I felt inside. Alex changed that. My well-honed relationship tactics and coping mechanisms were totally obvious and unusable on him. He asked what I was thinking and feeling, and would not let up until a real answer erupted from somewhere deep within me.?We had met our alter egos. We were the same, but in opposite gender bodies (or so we used to say). We could not hide from one another at all. And so, the truth finally came flying out of all the suppressed corners of our beings. And my emotions became completely out of control. I was explosive and unpredictable.

I suddenly found myself with an enormous past that demanded to be addressed and healed on or before my wedding day. For starters, my parents divorced when I was in first grade. Their relationship was incredibly turbulent and left me with memories that still wake me up panicked and afraid in the middle of the night. But then, there was also the string of subsequent marriages/long-term relationships/engagements that they dragged me through. Relationships have been forming and dissolving around me all my life. How could someone like me make a relationship, let alone?a marriage, work? How could I be happy without ever being shown a roadmap? I hadn't been taught to communicate, to cooperate, to love unconditionally, to be loyal or committed.

But, I had one thing that I had been clinging to since I was a kindergartener. While most kids were busy playing, I was busy thinking. And one of the earliest memories I have of actually sitting alone, pondering life in my bedroom, was a promise that I made to myself. I was sad and scared, and I didn't like what was going on between my parents downstairs. So I decided in that moment, with afternoon sunlight streaming across my blue and white flowered Laura Ashley wall paper, that I would never have their life. Of course, all of this was on a rudimentary level, but I have a very distinct memory of when this thought began and the many times I repeated it to myself until I was an adult. I still repeat this to myself.

Along with the wounds of divorce, my childhood also left me incredibly codependent thanks to generations upon generations of alcoholics and codependents occupying my life. This issue alone had left me feeling completely incapable of maneuvering even the most basic parts of daily life. I had known nothing but a diseased, unhealthy, warped, addictive way of living from the time I was born. When I left my home, just a month after I turned eighteen, I was not only faced with the task of adjusting to the independence of college, but also began to learn all the lessons?how to behave, and be, and interact with others?that I should have learned as a child. I made many, many?.many mistakes along the way. My mistakes and codependence, of course, were most notable in the romance department?Alex was no exception. But, I was so aware of myself with Alex that I began really dealing with these issues. I had been a recovering codependent for ten years prior to our relationship, but I was now on some crazy, fast track to health, which was incredibly relieving and empowering, but incredibly messy.

An epic story all its own, my surfacing issues also had a ripple effect throughout my life leaving me temporarily estranged from my family, adding to the pain of already being motherless.

So, here I was, engaged and planning a wedding by myself with an overwhelming number of ghosts lurking in the shadows of my insides. Ironically, the fact that all of this began to make itself known to me was a positive. It was a positive, because I was really, truly healing at last. And it was a positive, because I was with Alex. I had never felt safe, loved unconditionally, or totally supported before so I relied on so many coping mechanisms that allowed me to look like I had my shit together. I didn't need to cope with Alex. I was finally able to let go.

Regardless of the positives, though, my mini enormous breakdown was hard to bear?for me, and for Alex. I had to fall apart to somehow become whole, it felt like the only way. And fall apart I did.

I had been going to?upwards of five support groups a week since just after Alex proposed in December. I was totally dedicated to my recovery and my efforts felt like enough until summer came around.?The closer we got to the wedding, which was planned for October, the more anxious I became. I begged Alex to elope numerous times. While Alex clung to the idea of all our friends and family gathering to celebrate, I was sure that was exactly what would push me over the edge to a place I feared with my entire being. I began to have panic attacks, often daily.There were days I couldn't get out of bed. I started to feel unstable in a way that frightened Alex to such a degree that one hot day in July, he suggested we call off our wedding and reschedule it for a date yet to be determined. I felt like I had failed in that moment, like I was so broken that it was just too much to ask anyone to love me. But, Alex did. Although I spent the rest of that day sobbing, and thrashing underneath the covers of my bed in complete disbelief, it was a turning point. Alex and I started couple's therapy the following week, and I started on a cocktail of medication.

We spent almost three months in therapy.?After our first appointment things felt bleak and we weren't sure how we were going to get through such a challenging time. It felt like we had invited a third party in to add to the already long list of issues we knew we had, and though she never said it, we feared she didn't believe we should get married.?But, at some point in the midst of hours upon days upon weeks of talking, we saw the light. We suddenly worked through what had felt impossible so quickly, because we were ready and because we worked hard. Where we could have folded, we found strength.?And it became abundantly clear to all three of us in that tiny corner office with the uncomfortable, musty old couch, that we were ready to get married.

The night before our wedding I had three different pills lined up on my nightstand, I had lost a noticeable amount of hair and weight, and my eyes were dark and tired. I was far from looking my best. But, the next day was the most effortless and joyful day of my life. As much as I had hoped to look my most beautiful on my wedding day, there was beauty in my resilience, and the resilience of my relationship with Alex. I hadn't experienced my engagement the way I had once envisioned,?but it had a purpose.?Where we once carried glossy daydreams, we found real life.?It ultimately created a relationship that was steady, healthy, and that could stand up to the challenges we would face in the coming years.

Up next: trying to conceive...

Source: http://lolarain.blogspot.com/2013/01/marriage-and-baby-not-for-weak-part-i.html

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Iraqi Kurds defend oil policy, reject BP Kirkuk deal

BAGHDAD: Iraq's Kurdistan has defended its oil policy with foreign companies and its crude trade barter with Turkey as constitutional, and rejected a initial deal between Baghdad and BP to develop an oilfield in the disputed city of Kirkuk.

The statement came after Iraq's oil minister told Reuters Baghdad's central government would sue companies exporting crude from Kurdistan, warned of cuts to autonomous region's federal budget and announced an accord with BP for Kirkuk oilfield.

Iraq's Arab-led central government and Kurdistan Regional Government or KRG run by ethnic Kurds are locked in a widening dispute over control of oil revenues, oilfields and territory that is fraying the country's uneasy federal union.

"Iraq's citizens are simply tired of this sort of language of threat and intimidation, which in the cynical pursuit of narrow political agendas serves only to create division and strife," the KRG said in a statement on its website.

"In terms of oil and gas management, the KRG firmly believes in, and abides by, the letter and spirit of Iraq's permanent, federal constitution."

Speaking to Reuters on Wednesday, Oil Minister Abdul Kareem Luaibi said Baghdad intends to sue Genel Energy - the first company to export oil directly from Kurdistan - and may slash the government's allocated 17 percent budget to the region unless it halts what he rejected as smuggling.

Luaibi announced a preliminary agreement with BP to revive the giant northern Kirkuk oil field, which - apart from being at the centre of the fight between Kurdistan and Iraq - is suffering massive output declines.

"He reveals details of an illegal and unconstitutional plan to allegedly allow BP to enhance the recovery of some of the depleted fields in Kirkuk... without consulting and obtaining approval of the other parties to the dispute," the KRG statement said.

The feud between Baghdad and the Kurdistan enclave, which has run its own regional administration and armed forces since 1991, has escalated since the KRG began signing oil deals with oil majors Exxon Mobil and Chevron to develop fields.

Iraq's government claims it alone has the constitutional authority to export crude oil and sign deals, but Kurdistan says the constitution allows it to agree to contracts and ship oil independently of Baghdad.

Source: http://www.dailystar.com.lb/News/Middle-East/2013/Jan-18/202755-iraqi-kurds-defend-oil-policy-reject-bp-kirkuk-deal.ashx

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New Mexico's Latina Gov. Susana Martinez makes waves in the GOP

SANTA FE, N.M. ? In 2010, New Mexico's Susana Martinez made history, being elected the nation's first Latina governor. Since November, she's made waves, criticizing Mitt Romney for the harsh rhetoric of his presidential campaign and chiding fellow Republicans for actions that, she says, have needlessly estranged Latinos from the GOP.

"We have to make sure that as Republicans we don't just visit Latinos during election time, but that we make them part of the solution," Martinez said in an interview. "It's extremely important that we elect people that look like the population they serve."

Martinez is a strong favorite for reelection in 2014. Beyond that, the former prosecutor and Democrat-turned-Republican is touted as a potential U.S. attorney general or even vice president in a future GOP administration.

But here at home, some question Martinez's ability to advise her party, much less serve as a role model for Republicans grappling with their poor image among Latinos.

The doubts point to the highly charged politics surrounding immigration and related issues and underscore the challenge Republicans face as they try reaching out to Latinos without antagonizing the party's conservative base, as well as supporters who resist any easing of the GOP's hard-line stance.

Martinez has advantages other Republicans can't easily match, including a charismatic personality, a compelling up-by-the-bootstraps history and the benefit of running in a majority-minority state where Latinos have been an integral part of the power structure for decades.

"She can go into rural Hispanic areas and tell [her] story and impress a lot of people," said Brian Sanderoff, New Mexico's leading independent pollster. "It's a lot easier for a female Hispanic Republican to pull off than a middle-aged white guy, frankly."

But Martinez has also been a surprisingly divisive figure. Though she enjoys strong public approval ratings, she has a contentious relationship with Democrats in Santa Fe, the state capital, as well as with many Latino activists, who accuse her of scapegoating Latino newcomers and exploiting anti-immigrant sentiments for political gain.

"It's one thing to talk about changing tone and rhetoric," said Marcela Diaz, head of Somos Un Pueblo Unido, a group that has waged protests against Martinez and opposes her efforts to repeal the state law allowing illegal immigrants to get driver's licenses. "We'd like to see a change in tone and rhetoric, accompanied by action."

Martinez, speaking by phone from her Capitol office, cited polls that showed an overwhelming majority of New Mexicans ? including most Latinos ? favored repeal of the driver's license privilege, passed in 2003 under her Democratic predecessor, Bill Richardson. (Another poll, putting the question differently, found a that substantial majority of New Mexico Latinos favored reforming the law, rather than repealing it.)

"It's not a controversial issue," Martinez said. "The only ones who seem to call it a controversial issue are the people from the media."

Martinez won a tough primary by accusing her main rival of favoring "amnesty" for backing legislation, proposed by President George W. Bush, that aimed to stiffen border enforcement, create a guest worker program and establish a path to citizenship for millions of illegal immigrants. Any comprehensive bill that passes Congress would probably contain those same elements.

Asked whether the attack on her opponent, a former state GOP chairman, had been a mistake, the governor quickly replied, "No."

"There are many solutions to people who are here illegally that are between amnesty and deporting 12 million people," she said.

"I'm very pleased that Mrs. Martinez has come around to my position," the former chairman, Allen Weh, said dryly.

Martinez, 53, grew up in a bilingual household in El Paso. As a teenager she worked in her father's security business, toting a .357 Magnum ? "That gun weighed more than I did!" ? while patrolling the parking lot at church bingos, something she recounted in a well-received speech at last summer's Republican National Convention.

After college and law school, Martinez crossed the state line into New Mexico, switched parties and was elected district attorney in Dona Ana County, in the far south of the state, where she served four terms as chief prosecutor. She was a distinct underdog in the gubernatorial primary but surged to victory thanks in good part to her tough-on-immigration stance.

Martinez largely abandoned the issue in the general election, but she took a firm stand opposing the driver's license law ? a position shared by the Democrat she beat.

Since taking office, Martinez has made its repeal a centerpiece of her agenda, to the consternation of Latino activists and the puzzlement of Democrats and others who ask why she has invested so much effort, given the state's struggling economy and troubled schools.

"When did this become the be-all and end-all?" asked Joe Monahan, who writes a widely read nonpartisan blog on New Mexico politics. "Is this what the Latino population of America is focused on and wants to hear from Republicans? I don't think that's an olive branch."

Martinez said the driver's license issue is just one of several priorities, along with job creation and ending so-called social promotion, the practice of moving students to the next grade regardless of performance. But she said repeal is vital, suggesting that fraud is rampant and the state has become a magnet for criminals.

The issue has been fiercely debated across the country, including California, where a law that took effect Jan. 1 allows some illegal immigrants to obtain licenses.

For many, the matter is cut and dried. Illegal is illegal, opponents say, so why would a state provide official recognition to people who shouldn't be there? Proponents say it is absurd to ignore people on the roads, legal or not, and cite humanitarian and practical reasons to license drivers.

"You take away licenses, you take away a tool from our families to provide for their children," said Diaz, the immigrant advocate. "You make the state poorer, and it's not creating one job."

Using the issue as a bludgeon, Martinez and her allies spent unprecedented millions in a November attempt to win control of the state House and dislodge the Senate's Democratic leadership. The effort fell short ? the GOP lost House seats ? but Republicans managed to oust the No. 2 Senate Democrat.

Martinez has indicated she will try a fourth time to pass repeal legislation when the Legislature convenes Tuesday. Democrats, who have offered a proposal tightening restrictions and toughening enforcement, said the governor should accept the deal or move on.

For some lawmakers, the matter has become personal. For Martinez, it's a political test.

Asked whether Republicans outside New Mexico might learn from watching the governor, Democratic House Speaker Ken Martinez (no relation to her) said it remained to be seen. "She's finished two years of a four-year term," said the speaker, who enjoys relatively good relations with the governor. "What happens in the next two years?"

mark.barabak@latimes.com

Source: http://feeds.latimes.com/~r/latimes/news/nationworld/politics/scotus/~3/TlcyQVSutQ4/la-na-latinos-susana-martinez-20130113,0,3543672.story

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BEIJING -- China says it dispatched two fighter jets to tail Japanese warplanes...

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Do You Have Anxiety Or Panic Attacks ? This Technique Can Help ...

www.PanicAttacksCure.org Natural Technique to Stop Panic Attacks and End Anxiety Fast! http There is help for panic attacks.Learn more about the treatment and prevention of panic disorder. Learn more about anxiety disorders, including types, causes, symptoms, diagnosis, treatment, and prevention. Do you struggle with anxiety? What are the signs, symptoms, and types of anxiety attacks and disorders? Find relief that works for you. Panic disorder with agoraphobia is an anxiety disorder in which a person has attacks of intense fear and anxiety. Find everything you need to know about agoraphobia including causes, symptoms, diagnosis and treatment, with links to other useful resources. Learn the warning signs of a heart attack today and survive tomorrow. The sooner you recognise a heart attack and get treatment, the better. Depression symptoms, resources, puizzes, and treatment information for people who suffer from depressive problems. Depression is a serious medical illness; it is not something that you have made up in your head. Depression ? Comprehensive overview covers symptoms, treatment and coping with this mood disorder. Panic attacks ? Comprehensive overview covers symptoms, causes, treatment and self-care for panic disorder. Guide to panic disorder, including symptoms, treatment, and what you can do to help yourself. The means and methods to cure panic attacks without drugs. Offers several ideas to take back control of your life from panic attacks. his kind of ?

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Source: http://health-ful-hints.com/2013/01/08/do_you_have_anxiety_or_panic_attacks_-_this_technique_can_help/

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