Scientists create novel silicon electrodes that improve lithium-ion batteries

June 4, 2013 ? Stanford University scientists have dramatically improved the performance of lithium-ion batteries by creating novel electrodes made of silicon and conducting polymer hydrogel, a spongy material similar to that used in contact lenses and other household products.

Writing in the June 4 edition of the journal Nature Communications, the scientists describe a new technique for producing low-cost, silicon-based batteries with potential applications for a wide range of electrical devices.

"Developing rechargeable lithium-ion batteries with high energy density and long cycle life is of critical importance to address the ever-increasing energy storage needs for portable electronics, electric vehicles and other technologies," said study co-author Zhenan Bao, a professor of chemical engineering at Stanford.

To find a practical, inexpensive material that increases the storage capacity of lithium-ion batteries, Bao and her Stanford colleagues turned to silicon -- an abundant, environmentally benign element with promising electronic properties.

"We've been trying to develop silicon-based electrodes for high-capacity lithium-ion batteries for several years," said study co-author Yi Cui, an associate professor of materials science and engineering at Stanford. "Silicon has 10 times the charge storage capacity of carbon, the conventional material used in lithium-ion electrodes. The problem is that silicon expands and breaks."

Studies have shown that silicon particles can undergo a 400-percent volume expansion when combined with lithium. When the battery is charged or discharged, the bloated particles tend to fracture and lose electrical contact. To overcome these technical constraints, the Stanford team used a fabrication technique called in situ synthesis polymerization that coats the silicon nanoparticles within the conducting hydrogel.

This technique allowed the scientists to create a stable lithium-ion battery that retained a high storage capacity through 5,000 cycles of charging and discharging.

"We attribute the exceptional electrochemical stability of the battery to the unique nanoscale architecture of the silicon-composite electrode," Bao said.

Using a scanning electron microscope, the scientists discovered that the porous hydrogel matrix is riddled with empty spaces that allow the silicon nanoparticles to expand when lithium is inserted. This matrix also forms a three-dimensional network that creates an electronically conducting pathway during charging and discharging.

"It turns out that hydrogel has binding sites that latch onto silicon particles really well and at the same time provide channels for the fast transport of electrons and lithium ions," explained Cui, a principal investigator with the Stanford Institute for Materials and Energy Sciences at the SLAC National Accelerator Laboratory. "That makes a very powerful combination."

A simple mixture of hydrogel and silicon proved far less effective than the in situ synthesis polymerization technique. "Making the hydrogel first and then mixing it with the silicon particles did not work well," Bao said. "It required an additional step that actually reduced the battery's performance. With our technique, each silicon nanoparticle is encapsulated within a conductive polymer surface coating and is connected to the hydrogel framework. That improves the battery's overall stability."

Hydrogel primarily consists of water, which can cause lithium-ion batteries to ignite -- a potential problem that the research team had to address. "We utilized the three-dimensional network property of the hydrogel in the electrode, but in the final production phase, the water was removed," Bao said. "You don't want water inside a lithium-ion battery."

Although a number of technical issues remain, Cui is optimistic about potential commercial applications of the new technique to create electrodes made of silicon and other materials.

"The electrode fabrication process used in the study is compatible with existing battery manufacturing technology," he said. "Silicon and hydrogel are also inexpensive and widely available. These factors could allow high-performance silicon-composite electrodes to be scaled up for manufacturing the next generation of lithium-ion batteries. It's a very simple approach that's led to a very powerful result."

Source: http://feeds.sciencedaily.com/~r/sciencedaily/matter_energy/biochemistry/~3/x1lgbtcYA9o/130604094703.htm

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Grown-up Nicole Richie laughs over bad tattoo

TV

Randee Dawn TODAY contributor

17 hours ago

Everybody's got to grow up sometime; it's just that reality stars can take a little longer than some. Well, consider Nicole Richie -- erstwhile star of "The Simple Life" -- all grown up now, and ready to take responsibility for some of her mistakes. Like a particular tattoo.

"My embarrassing tramp stamp!" she laughed about it on TODAY Tuesday morning while discussing her new web series, "#CandidlyNicole."

The show, which posts on AOL on Tuesdays, basically is made up of short videos focusing on her tweets. "Twitter is something that I enjoy doing," she said. "I don't take it that deep."

But while she's still living a funny life via Twitter, her real life is now that of a wife (to Good Charlotte singer Joel Madden) and mom of two kids. "Joel and I are very specific about the way that we do raise our children," she said. "We just do everything that we can to make sure that they live normal lives."

Well, as normal as you can when you've got a rock star for a dad, a web star for a mom and an R&B icon -- in Lionel Richie -- for a granddad. Speaking of which, Richie (who will perform on the TODAY Plaza Friday) appears in the June 11 "#CandidlyNicole" episode doing something surprising -- gardening.

"L-Train is the best at gardening," she said. "We decided to throw him a bone and help him out."

Yep, all grown up now!

Source: http://www.today.com/entertainment/nicole-richie-grows-gets-candid-about-new-web-series-6C10185383

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New kind of antibiotic may be more effective at fighting tuberculosis, anthrax, and other diseases

June 3, 2013 ? Diseases such as tuberculosis, anthrax and shigellosis -- a severe food-borne illness -- eventually could be treated with an entirely new and more-effective kind of antibiotic, thanks to a team of scientists led by Kenneth Keiler, an associate professor of biochemistry and molecular biology at Penn State. The team describes 46 previously untested molecules that target and disrupt an important step in the process of protein synthesis in bacteria, thereby making the bacteria incapable of replicating.

This important step, known as "trans-translation," is a quality-control mechanism that is found in all species of bacteria. "If you imagine a bacterium's protein-synthesis pathway as a factory assembly line, trans-translation is responsible for keeping the assembly line moving," Keiler said. "Faulty messenger RNA -- which conveys genetic information from DNA to proteins -- can block the bacterium's synthesis machinery. But the trans-translation mechanism removes these blockages from the assembly line, thereby keeping the bacterium's system running smoothly." Keiler explained. "The bacterium would not be able to synthesize the proteins that it needs for survival without the trans-translation mechanism." Plants and animals, do not seem to have or need this trans-translation process.

Keiler discovered the previously unknown trans-translation process in bacteria when he was a graduate student in 1996. Since then, he has been working to find molecules capable of disrupting this part of bacteria's protein-synthesis pathway. "The idea is to throw a wrench into the protein-synthesis assembly line and prevent bacterial organisms from making copies of themselves," Keiler said.

To discover which small molecules might be capable of disrupting trans-translation, the team began with a process called high-throughput screening -- a method of trying out many thousands of small molecules with the hope of discovering one or more that might be effective at combatting certain pathogens. "Our team tested about 663,000 different molecules against a strain of E. coli bacteria and monitored how they were affecting its trans-translation process," Keiler said. At the end of this phase of testing, Keiler and his team had found 46 different molecules that appeared to be effective in disrupting the trans-translation process.

The next step was to test these molecules' performance in another genus of bacteria (Shigella) that is known to cause food poisoning. This genus is related to Salmonella and to the organism that causes anthrax (Bacillus anthracis), which sometimes can be lethal in humans and other animals. "Of the 46 molecules that were shown to affect trans-translation, one called KKL-35 jumped out as the most promising," Keiler said. "We found that the KKL-35 molecule inhibits the growth of very distantly related bacteria, and this suggests that it may have antibiotic activity against a very broad spectrum of species."

As for the Shigella and Bacillus anthracis bacteria, Keiler said his team was able to show that, "in the presence of the KKL-35 molecule, these cells died specifically because the molecule halted the trans-translation process." Keiler's team also found that, compared with currently used tuberculosis drug therapies, the KKL-35 molecule was 100-times more effective at inhibiting the growth of the strain of bacteria that causes tuberculosis (Mycobacterium tuberculosis).

Keiler added that one of the most exciting features of an antibiotic designed from the KKL-35 molecule is that drug resistance is not very likely to develop in mutant strains of the targeted bacteria. "In our laboratory experiments, we found no mutant strains that were resistant to KKL-35," Keiler said. "Resistant mutants probably could evolve eventually, but at least it looks like it will be very difficult. That means resistant mutants might be slow to arise and spread."

The research was funded by the National Institutes of Health.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/most_popular/~3/BOWhk8G8H6k/130603163809.htm

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Turkey Protests 2013: Violence Flares On 4th Day Of Anti-Government Demonstrations (PHOTOS, VIDEO)

Some stores on Istiklal street are damaged by protestors on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in Taksim Square in Istanbul. (OZAN KOSE/AFP/Getty Images)

Tourists gasp for breath as Turkish protestors and riot policemen clash on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in Taksim Square in Istanbul. (BULENT KILIC/AFP/Getty Images)

Turkish protestors and riot policemen clash on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in Taksim Square in Istanbul. Police reportedly used tear gas to disperse a group, who were standing guard in Gezi Parki to prevent the Istanbul Metropolitan Municipality from demolishing the last remaining green public space in the centre of Istanbul as a part of a major Taksim renewal project. At least a dozen people were injured. (BULENT KILIC/AFP/Getty Images)

Protestors buy gas masks from shops on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in karakoy in Istanbul. (GURCAN OZTURK/AFP/Getty Images)

The slogan 'Fuck police' is seen on June 1, 2013 on a shop window which has been broken, on Istiklal street, during a protest on the eve against the demolition of Taksim Gezi Park, in Taksim Square in Istanbul. (OZAN KOSE/AFP/Getty Images)

Riot police use tear gas against protestors in Istiklal street on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in Taksim Square in Istanbul. (OZAN KOSE/AFP/Getty Images)

Istiklal street seen in early morning during the clashes on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in Taksim Square in Istanbul. (OZAN KOSE/AFP/Getty Images)

Some stores on Istiklal street are damaged by protestors on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in Taksim Square in Istanbul. (OZAN KOSE/AFP/Getty Images)

A riot policeman holds a tear gas bomb on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in Taksim Square in Istanbul. (OZAN KOSE/AFP/Getty Images)

Fenerbahce and Galatasaray football teams supporters chant slogangs against the goverment on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in istiklal in Istanbul. (OZAN KOSE/AFP/Getty Images)

A women asks police to stop as Turkish protestors and riot policemen clash on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in Taksim Square in Istanbul. (BULENT KILIC/AFP/Getty Images)

Turkish protestors and riot policemen clash on June 1, 2013, during a protest against the demolition of Taksim Gezi Park, in Taksim Square in Istanbul. (BULENT KILIC/AFP/Getty Images)

Protestors clash with Turkish riot policemen on May 31, 2013 during a protest against the demolition of the Taksim Gezi Park in Taksim Square in Istanbul. (GURCAN OZTURK/AFP/Getty Images)

Protestors clash with Turkish riot policemen on May 31, 2013 during a protest against the demolition of the Taksim Gezi Park in Taksim Square in Istanbul. (GURCAN OZTURK/AFP/Getty Images)

A man falls as riot police use tear gas and pressurized water to quash a peaceful demonstration by hundreds of people staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey, Friday, May 31, 2013. A number of protesters were injured. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

An injured man reacts as riot police use tear gas and pressurized water to quash a peaceful demonstration by hundreds of people staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey, Friday, May 31, 2013. A number of protesters were injured. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

Riot police use tear gas and pressurized water to quash a peaceful demonstration by hundreds of people staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey, Friday, May 31, 2013. A number of protesters were injured. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

Protesters react as riot police use tear gas and pressurized water to quash a peaceful demonstration by people staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey, Friday, May 31, 2013. A number of protesters were injured. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

In this Thursday, May 30, 2013 photo, a man seen wearing a make-shift gas-mask hours before riot police use tear gas and pressurized water to quash a peaceful demonstration by hundreds of people staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim, injuring a number of protesters. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

In this Thursday, May 30, 2013 photo, People seen during a peaceful demonstration, staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim, injuring a number of protesters. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

A woman protects herself as riot police use tear gas and pressurized water to quash a peaceful demonstration by hundreds of people staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey, Friday, May 31, 2013. A number of protesters were injured. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

Women try to protect themselves as riot police use tear gas and pressurized water to quash a peaceful demonstration by hundreds of people staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey, Friday, May 31, 2013. A number of protesters were injured. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

A man helps an injured woman as riot police use tear gas and pressurized water to disperse protesters staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey, Friday, May 31, 2013. A number of protesters were injured. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

Riot police use water cannon to disperse protesters staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey, Friday, May 31, 2013. A number of protesters were injured. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

Riot police use tear gas and pressurized water to disperse protesters staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey, Friday, May 31, 2013. A number of protesters were injured. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul?s main square, Taksim. The protesters are demanding that the square?s park, Gezi, is protected. (AP Photo)

A woman holds up a banner that reads "Don't interfere with my life style " as thousands of people gather in support of demonstrators staging a sit-in to prevent the uprooting of trees at an Istanbul park, in Ankara, Turkey, Friday, May 31, 2013. Riot police clash with demonstrators after they used tear gas and pressurized water in a dawn raid on Friday to rout a peaceful demonstration by thousands of people in Istanbul. Several protesters were injured when a wall they climbed collapsed during a police chase. Police moved in to disperse the crowd on the fourth day of the protest against a government plan to revamp Istanbul?s main square, Taksim. (AP Photo/Burhan Ozbilici)

People hold up banners that read " Chemical Tayyip, Go!" and "Resist the Dictator" as thousands of people gather in support of demonstrators staging a sit-in to prevent the uprooting of trees at an Istanbul park, in Ankara, Turkey, Friday, May 31, 2013. Riot police clash with demonstrators after they used tear gas and pressurized water in a dawn raid on Friday to rout a peaceful demonstration by thousands of people in Istanbul. Several protesters were injured when a wall they climbed collapsed during a police chase. Police moved in to disperse the crowd on the fourth day of the protest against a government plan to revamp Istanbul?s main square, Taksim. (AP Photo/Burhan Ozbilici)

Thousands of people gather in support of demonstrators staging a sit-in to prevent the uprooting of trees at an Istanbul park, in Ankara, Turkey, Friday, May 31, 2013. Riot police clash with demonstrators after they used tear gas and pressurized water in a dawn raid on Friday to rout a peaceful demonstration by thousands of people in Istanbul. Several protesters were injured when a wall they climbed collapsed during a police chase. Police moved in to disperse the crowd on the fourth day of the protest against a government plan to revamp Istanbul?s main square, Taksim. (AP Photo/Burhan Ozbilici)

Riot police clash with demonstrators after they used tear gas and pressurized water in a dawn raid Friday to rout a peaceful demonstration by hundreds of people staging a sit-in to prevent the uprooting of trees at an Istanbul park, Turkey, Friday, May 31, 2013. Several protesters were injured when a wall they climbed collapsed during a police chase, and Ahmet Sik, a prominent journalist was hospitalized after being hit in the head by a tear gas canister. Police moved in to disperse the crowd on the fourth day of the protest against a government plan to revamp Istanbul?s main square, Taksim. Officers then clashed with angry demonstrators in surrounding areas. (AP Photo)

Source: http://www.huffingtonpost.com/2013/06/03/turkey-protests-2013_n_3376928.html

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Ohio State president to retire because of Notre Dame remarks

COLUMBUS, Ohio (AP) ? Ohio State University President Gordon Gee announced his retirement Tuesday after he came under fire for jokingly referring to "those damn Catholics" at Notre Dame and poking fun at the academic quality of other schools.

The remarks were first reported last week by The Associated Press, and Ohio State at the time called them unacceptable and said it had placed Gee on a "remediation plan" to change his behavior.

Gee, 69, said in a teleconference Tuesday that the furor was only part of his decision to retire, which he said he had been considering for a while. He said his age and the start of a long-term planning debate at the university were also factors.

"I live in turbulent times and I've had a lot of headwinds, and so almost every occasion, I have just moved on," he said. Gee explained away the abrupt timing of his announcement by saying he was "quirky as hell" and hated long transitions.

According to a recording of a Dec. 5 meeting obtained by the AP under a public records request, Gee, a Mormon, said Notre Dame was never invited to join the Big Ten athletic conference because "you just can't trust those damn Catholics."

Gee also took shots at schools in the Southeastern Conference and the University of Louisville, according to the recording of the meeting of the school's Athletic Council.

Gee apologized when the comments were disclosed, saying they were "a poor attempt at humor and entirely inappropriate."

His decision to retire was first reported by The Columbus Dispatch.

Robert Schottenstein, who as chairman of the university's board of trustees condemned the remarks last week as "wholly unacceptable" and "not presidential in nature," deflected questions of whether Gee had been forced out by the board.

"It's really about a decision to retire for the reasons that Gordon has articulated," Schottenstein said.

The university named provost Joseph Alutto as interim president.

Gee, a familiar figure on campus with his bowties and owlish glasses, has repeatedly gotten in trouble over the years for verbal gaffes.

Ohio State trustees learned of Gee's latest remarks in January and created the remediation plan. In a March 11 letter, the trustees warned any repeat offenses could lead to his firing and ordered him to apologize to those he offended. But it appeared that several of Gee's apologies came only in the last week or so as the university prepared to respond to the AP's inquiries.

During his comments to the Athletic Council, Gee said that the top goal of Big Ten presidents is to "make certain that we have institutions of like-minded academic integrity. So you won't see us adding Louisville." After laughter from the audience, Gee added that the Big Ten wouldn't add the University of Kentucky, either.

When asked by a questioner how to respond to SEC fans who say the Big Ten can't count because it now has 14 members, Gee said: "You tell the SEC when they can learn to read and write, then they can figure out what we're doing."

Gee also came under fire a few years ago for some offhand remarks during a memorabilia-for-cash and tattoos scandal under football coach Jim Tressel's watch. Gee was asked in 2011 whether he had considered firing Tressel. He responded: "No, are you kidding? Let me just be very clear: I'm just hopeful the coach doesn't dismiss me."

Last year, Gee apologized for saying that coordinating the school's many divisions was like running the Polish army, a remark that a Polish-American group called bigoted.

In 1992, in a moment of frustration over higher-education funding, Gee referred to then-Gov. George Voinovich as "a damn dummy."

Gee was named the country's best college president in 2010 by Time magazine. He has held the top job at West Virginia University, the University of Colorado, Brown and Vanderbilt. He was Ohio State president from 1990 to 1997 and returned in 2007. He makes about $1.9 million a year in base pay, deferred and performance compensation and retirement benefits.

He is a prolific fundraiser and is leading a $2.5 billion campaign at Ohio State, one of the nation's largest universities, with 65,000 students. He is omnipresent on campus, attending everything from faculty awards events to dormitory pizza parties.

Gov. John Kasich praised Gee on Tuesday as "a tremendous partner in transforming Ohio's fragmented higher education system into one better focused on fueling Ohio's economic recovery and helping students meet their goals."

___

Andrew Welsh-Huggins can be reached on Twitter at https://twitter.com/awhcolumbus.

Source: http://news.yahoo.com/ohio-st-president-retires-notre-dame-jabs-193047776.html

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Wildlife Conservation Pioneers Honored For Sacrifices

HARRISBURG, Pa., June 4, 2013 /PRNewswire-USNewswire/ -- Two pioneers of wildlife conservation in Pennsylvania have had their names added to a Washington, D.C. memorial that recognizes the sacrifice of law-enforcement officers who die in the line of duty.

Dr. Joseph H. Kalbfus and Elias W. "Woody" Kelly, who died together in a vehicle crash in 1919, were among 321 officers who officially had their names added to the walls of the National Law Enforcement Officers Memorial at a May 13 ceremony.

Kalbfus was Pennsylvania's first chief game protector and the second executive secretary of the Pennsylvania Game Commission, while Kelly was instrumental in the development of the state's game-refuge system to restore beleaguered wildlife populations in the early 20^th century.

Refuges were the precursor to the State Game Lands system, which now comprises about 1.5 million acres statewide.

Beginning his work at a time when laws to protect wildlife weren't readily followed or enforced, Kalbfus is known for his tenacity to achieve compliance in a dangerous environment, where officers were frequently fired upon. He also was instrumental in the creation of a resident hunting license to fund wildlife management, launching the game-refuge system and restocking Pennsylvania's depleted deer herd.

Meanwhile, Kelly, a game protector, quickly rose through the ranks to become the field superintendent of game refuges, working tirelessly to improve game conditions throughout the state. His achievements included reintroducing beaver, which had vanished from the state in the late 1800s.

In August 1919, Kelly and Kalbfus were among a group that set out to identify prospective game refuges west of the Allegheny Mountains, when the men met their untimely deaths at a railroad intersection. Their vehicle was struck by a train at a high rate of speed near Tiona, in Warren County.

The addition of Kalbfus and Kelly to the memorial results from recent efforts by the Game Commission to have the men honored. Game Commission Executive Director Carl G. Roe made application to the National Law Enforcement Officers Memorial earlier this year.

"We take great pride in our wildlife conservation officers, past and present, and we're proud the sacrifices of these two men now have been honored eternally," Roe said.

A six-man contingent of the Game Commission's Ceremonial Unit took part in the May 13 ceremony.

A more detailed account of the ceremony, as well as the lives of Kalbfus and Kelly, will be featured in an upcoming edition of the Pennsylvania Game News.

FALLEN OFFICERS

The National Law Enforcement Officers Memorial in Washington, D.C. contains the names of more than 19,000 men and women who were killed in the line of duty. Seven of those officers served with the Pennsylvania Game Commission at the time of their deaths. They are:

• L. Seeley Houk, fatally shot in Lawrence County in 1906
• Joseph McHugh, fatally shot in Carbon County in 1915
• Joseph H. Kalbfus, died in Warren County crash in 1919
• Elias W. "Woody" Kelly, died in Warren County crash in 1919
• John B. Ross, drowned during McKean County rescue attempt in 1942
• Woodrow E. Portzline, suffered heart attack during 1973 investigation
• David L. Grove, fatally shot in Adams County in 2010

Editor's note: Photographs available with this news release.

SOURCE Pennsylvania Game Commission

Source: http://news.yahoo.com/wildlife-conservation-pioneers-honored-sacrifices-114200262.html

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