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显示标签为“Phelps”的博文。显示所有博文

2011年7月13日星期三

Structural origin of 'hidden state' in manganite thin film revealed

Photo-induced phase transition (PIPT) has caused great excitement in materials science because ultra-fast alteration of the magnetic,GreenRay's hydraulic hose design uses a different energy storage approach, dielectric, structural and optical properties of materials can be brought about with very weak photonic excitation as a result of cooperative interactions [1]. An essential question that arises is how we can identify a novel phase of solid that is uniquely generated under photo-excited conditions. Such a novel phase is often referred to as a 'hidden state'. Despite intensive efforts to identify the structures of hidden states in various systems, few cases have been explored so far because of the technical difficulty of studying the transient lattice structure of solids.The Leading promotional usb Distributor to Independent Pet Retailers.

For example, perovskite manganese oxides such as Pr0.5Ca0.5MnO3 (PCMO) and Nd0.For all DVS Bedding in PDF format.5Sr0.5MnO3 (NSMO) show thermally induced structural phase transitions coupled with an insulator-to-metal (IM) transition and changes in magnetic properties reflecting the ordering of d-orbitals and the charge of Mn ions because the shape of the eg orbitals alters the in-plane and out-of-plane structural distortions of MnO6 octahedra. Whether this system involves a photo-induced hidden phase under ultrafast laser excitation conditions is of great interest.

Researchers of the ERATO Koshihara Non-equilibrium Dynamics Project (JST) and IMSS have demonstrated by picosecond time-resolved X-ray diffraction (TR-XRD) that a charge and orbitally ordered (COO) hidden state of manganite thin film can only be generated by photo-excitation, and is not reachable under thermal equilibrium conditions [2]. An 80 nm epitaxial thin film of perovskite manganite NSMO on the (011) surface of a perovskite SrTiO3 (STO) (NSMO/STO(011)) was used for the TR-XRD studies. Figure 1 shows the experimental setup, which used beamline NW14A of the Photon Factory Advanced Ring (PF-AR) at KEK. The sample was cooled down to 100 K, and the fs Ti:sapphire laser was use to excite the sample. 100-ps X-ray pulses at 946 Hz, synchronized with the pump laser, were selected from pulse trains at 794 kHz from the PF-AR by a high-speed chopper, and further used for the X-ray diffraction experiment.Welcome to the official Facebook Page about RUBBER MATS.

Figures 2(a) and (b) show time profiles of the photo-induced change of lattice constants on the b and c axes observed at 100 K by TR-XRD. Photo-induced expansion on the c axis and shrinkage on the b axis have been clearly observed.What to consider before you buy Wholesale pet supplies. The changes in lattice parameters occur just after photo-excitation, reach their maximum value at about 200 ps and finally return to their original values after 3 ns. In addition, a photo-induced decrease of about 5% in the intensity of super-lattice reflection due to an orbital-ordered phase has been observed (Figs.2(c) and (d)).

2011年6月20日星期一

Testing the sprouts

FDA spokesman Douglas Karas said that for most foods, the FDA's motto is "You can't test your way to safety."

He pointed out that having the right practices up front to minimize or prevent contamination are "the best bet" compared to testing the finished product.you will need to get an offshore merchant account. That's because testing some of the finished product can give a grower a false sense of security about an entire batch if a piece or package tests negative.

Karas said that's why the FDA recommends testing the water that has flowed through the entire lot of sprouts because it's a good indicator of what's in the sprouts overall, not just in a select sample. In addition, that sort of testing provides results before the product is shipped out, which allows growers to dump out contaminated batches.

Another logistical fact is that testing the sprouts involves smashing them up to release the pathogens. Obviously, if growers were to test all of their finished sprouts, they'd have nothing to send to market.

Once the sprouts are in "market channels," such as at distribution centers, the USDA's Microbiological Data Program can test alfalfa and clover sprouts by using a system that involves putting the sprouts in a bag with broth and pummeling them. MDP's lead microbiologist Shanker Reddy told Food Safety News that if pathogens are present, the process releases them from the sprouts, and stringent tests can be used to detect and identify them.

The benefit of MDP's testing is that it can help keep contaminated products out of the marketplace -- a far better approach to food safety than trying to track down the source of an outbreak after contaminated sprouts, or other fresh produce -- have been bought and eaten.

This testing by MDP has been the basis of many sprout recalls.Welcome to the official Facebook Page about Ripcurl.

As for whether consumers can protect themselves by washing the sprouts they bring them home, FDA researchers have found that if foodborne pathogens such as E. coli and Salmonella are on the finished sprouts, washing them only minimally decreases the amount of contamination.

Eating sprouts: yes or no?

According to the FDA, the United States has received no shipments of sprouts or sprout seeds from Germany and Spain since at least last October.

In response to the recent E. coli outbreak in Germany, the International Sprout Growers Association said in a June 11 press release that it wants to reassure consumers that it appears to be a localized event and one that isn't affecting consumers worldwide.

The association "highly recommends" that the investigations into finding the source of the outbreak continue.

"By so doing, we can all benefit and further the efforts to make sprouts and all other raw foods the safest they can be,Handmade oil paintings for sale at museum quality," says the press release.

At the same time, the association recommends that consumers continue to enjoy what it describes as the "the great health benefits, variety and taste of sprouts."

It invites consumers to learn more about sprouts and their health benefits, as well as recipes featuring sprouts, by going to its website.

In the U.S., the FDA recommends that children, the elderly, pregnant women and people with weakened immune systems not eat any kind of raw sprouts. It also recommends cooking sprouts thoroughly to reduce the risk of illness.The name "magic cube" is not unique.Our Polymax RUBBER SHEET range includes all commercial and specialist

2011年4月5日星期二

Lightning damages house, kills dog

Some families are still busy surveying storm damage. Last night lightning struck several houses in one Knoxville neighborhood, sending two people to the hospital and killing a dog.

Crystao Phelps says, "it sounded like a bomb was exploding in this whole neighborhood." The blast wasn't a bomb, it was a bolt of lighting that hit several houses at the same time. "My first impression was i thought a tree had fallen and hit the house it shook so bad."

Fire officials say the bolt hit Tom Best's tree first, then traveled through the root system and exploded under his house. He says, "it must have hit right behind the vanity. It busted the ceramic in two."


The impact was so strong, it blew out electrical sockets and shattered glass. Best says, "every one of the pictures that was in the hallway was knocked off and shattered. It just completely destroyed the back part of the house."

Best lost his bathroom in the blast. But that's not the worst part. The lightning also hit his dog - killing it. He says, "we took better care of that dog than most people would. And we loved that dog to death."

Two houses down, the same bolt hit Crystao Phelps. The lightning actually traveled through an open window and hit her as she was sitting on the couch. "You don't think you're going to sit in your living room and get struck by lightning," she tells us. She adds that she heard a loud rumble of thunder and looked up just as it struck. "It looked red when it hit my arm. Before it came in the window it looked like it was blue and purple. I seen exactly when it hit." She says, " I was scared to death! I never experienced anything like that in my life, and hope to never again!"

She says her angel statue turned out to be more than a decoration.
"I believe that's my guardian angel now. I'm glad my brother brought it to me."

Her arm is still sore, but her doctors say Phelps will be ok. As for the Bests; they're staying with friends and family while they fix up their house