Thursday, February 24, 2005

A paste containing synthetic tooth enamel can seal small cavities without drilling. Kazue Yamagishi and colleagues at the FAP Dental Institute in Tokyo say that the paste can repair small cavities in 15 minutes.

Currently, fillers don’t stick to such small cavities so dentists must drill bigger holes. Hydroxyapatite crystals, of which natural enamel is made, bond with teeth to repair tiny areas of damage.

Yamagishi and colleagues have tested their paste on a lower premolar tooth that showed early signs of decay. They found that the synthetic enamel merged with the natural enamel. The synthetic enamel also appears to make teeth stronger which will improve resistance to future decay. As with drilling, however, there is still the potential for pain: The paste is strongly acidic to encourage crystal growth and causes inflammation if it touches the gums.

The paste is reported in the journal Nature.

Friday, March 23, 2007

In a press release earlier today, New York State Agriculture Commissioner Patrick Hooker, along with Dean of Cornell University’s College of Veterinary Medicine Donald F. Smith, confirmed that scientists at the New York State Food Laboratory identified Aminopterin as a toxin present in cat food samples from Menu Foods.

Menu Foods is the manufacturer of several brands of cat and dog food subject to a March 16, 2007 recall.

Aminopterin is a drug used in chemotherapy for its immunosuppressive properties and, in some areas outside the US, as a rat poison. Earlier reports stated that wheat gluten was a factor being investigated, and officials now state that the toxin would have come from Chinese wheat used in the pet food, where it is used for pest control. Investigators will not say that this is the only contaminant found in the recalled food, but knowing the identity of the toxin should assist veterinarians treating affected animals.

The Food Laboratory tested samples of cat food received from a toxicologist at the New York State Animal Health Diagnostic Center at Cornell University. The samples were found to contain the rodenticide at levels of at least 40 parts per million.

Commissioner Hooker stated, “We are pleased that the expertise of our New York State Food Laboratory was able to contribute to identifying the agent that caused numerous illnesses and deaths in dogs and cats across the nation.”

The press release suggests Aminopterin, a derivative of folic acid, can cause cancer and birth defects in humans and can cause kidney damage in dogs and cats. Aminopterin is not permitted for use in the United States.

The New York State Food Laboratory is part of the Federal Food Emergency Response Network (FERN) and as such, is capable of running a number of unique poison/toxin tests on food, including the test that identified Aminopterin.

Even without LaDainian Tomlinson and Philip Rivers, the Chargers made sure the Indianapolis Colts won’t repeat as Super Bowl champions.

Now San Diego must make sure it doesn’t repeat its last performance at New England.

That will be especially difficult without an injured L.T., who departed in the first half with a bruised left knee, and starting quarterback Rivers, who went out in the third quarter with a damaged right knee in the Chargers’ stunning 28-24 victory Sunday.

With Billy Volek at quarterback and Michael Turner as the main runner, San Diego went 78 yards on eight plays, with Volek sneaking in from the 1 with 4:50 remaining for the lead. The Chargers’ big-play defense then held on downs at its 7, and stopped Indy again in the final moments to preserve their eighth straight win.

To make it nine in a row and advance to their second Super Bowl — the other was a loss to San Francisco after the 1994 season — the Chargers will need all the resourcefulness they showed at Indianapolis. Being undermanned against undefeated New England hardly is an enticing prospect.

Still, with All-Pro cornerback Antonio Cromartie getting an interception and fumble recovery, and linebackers Shawne Merriman and Shaun Phillips plaguing Peyton Manning, the Chargers showed they have the ability to throw off any offense. Maybe even the most prolific attack in NFL history.

The Chargers didn’t come close against the Patriots in Week 2, falling 38-14. That was the beginning of a slide to 5-5 for San Diego, but the Chargers (13-5) are rolling now.

It was a gutty showing by Rivers, who threw for three scores — he banged his right knee on a 56-yard screen pass TD by Darren Sproles to end the third quarter. And Turner, who could be a starter elsewhere but usually sits behind league rushing leader Tomlinson, gave the offense the balance it desperately needed in the late stages of the upset, rushing for 71 yards.

The Chargers’ opportunistic defense, which led the league in takeaways (48) and turnover margin (plus-24), grabbed two interceptions — both on tipped balls — and a fumble. While San Diego couldn’t stop Manning’s offense from steadily marching downfield most of the game, it could make the key plays that get you closer to the Super Bowl.

Still, if Tomlinson is limited or sidelined, how much chance do the Chargers have against the perfect Patriots? Not to mention perhaps missing Rivers or tight end Antonio Gates, who courageously played much of the day on a dislocated toe.

For the Colts (13-4), it was a bitterly quick elimination from the postseason.

A year ago, they won three playoff games, then beat Chicago in the Super Bowl. They couldn’t recapture their touch on offense or defense this time, and a defense that allowed the fewest points during the season wore down against the equally physical Chargers.

Manning did throw for 402 yards, completing 33 of his 48 throws, but both interceptions killed deep scoring threats.

Rivers was 14-of-19 for 264 yards, and Volek went 3-of-4 for 48 yards in his clutch relief role. Vincent Jackson became Rivers’ top target and had seven catches for 93 yards and a score.

Tuesday, March 29, 2005A team of Australian surgeons yesterday reattached both hands and one foot to 10-year-old Perth boy, Terry Vo, after a brick wall which collapsed during a game of basketball fell on him, severing the limbs. The wall gave way while Terry performed a slam-dunk, during a game at a friend’s birthday party.

The boy was today awake and smiling, still in some pain but in good spirits and expected to make a full recovery, according to plastic surgeon, Mr Robert Love.

“What we have is parts that are very much alive so the reattached limbs are certainly pink, well perfused and are indeed moving,” Mr Love told reporters today.

“The fact that he is moving his fingers, and of course when he wakes up he will move both fingers and toes, is not a surprise,” Mr Love had said yesterday.

“The question is more the sensory return that he will get in the hand itself and the fine movements he will have in the fingers and the toes, and that will come with time, hopefully. We will assess that over the next 18 months to two years.

“I’m sure that he’ll enjoy a game of basketball in the future.”

The weight and force of the collapse, and the sharp brick edges, resulted in the three limbs being cut through about 7cm above the wrists and ankle.

Terry’s father Tan said of his only child, the injuries were terrible, “I was scared to look at him, a horrible thing.”

The hands and foot were placed in an ice-filled Esky and rushed to hospital with the boy, where three teams of medical experts were assembled, and he was given a blood transfusion after experiencing massive blood loss. Eight hours of complex micro-surgery on Saturday night were followed by a further two hours of skin grafts yesterday.

“What he will lose because it was such a large zone of traumatised skin and muscle and so on, he will lose some of the skin so he’ll certainly require lots of further surgery regardless of whether the skin survives,” said Mr Love said today.

The boy was kept unconscious under anaesthetic between the two procedures. In an interview yesterday, Mr Love explained why:

“He could have actually been woken up the next day. Because we were intending to take him back to theatre for a second look, to look at the traumatised skin flaps, to close more of his wounds and to do split skin grafting, it was felt the best thing to do would be to keep him stable and to keep him anaesthetised.”

Professor Wayne Morrison, director of the respected Bernard O’Brien Institute of Microsurgery and head of plastic and hand surgery at Melbourne’s St Vincent’s Hospital, said he believed the operation to be a world first.

Thursday, November 12, 2009

Researchers have found a crucial genetic difference between humans and chimps that could help explain our language and speech abilities. The difference lies in a gene called FOXP2 which encodes for a protein of the same name. This acts as a transcription factor, controlling the activity of other genes.

The human and chimp versions of the protein differ in only two of their 740 amino acid components, but when researchers at the University of California, Los Angeles, replaced the human gene with the chimp version in neurons grown in the laboratory, they found it affected the expression of at least 116 other genes.

The results are detailed in a paper published on Thursday in the scientific journal Nature.

Author of the study Dr. Daniel Geschwind, of the David Geffen School of Medicine at UCLA, said the gene had a “major role” in differences between chimps and humans. “We showed that the human and chimp versions of FOXP2 not only look different but function differently too.”

Some of the affected genes control the formation of connections in the brain, whilst others relate to facial movements. Several have already been found to be involved in language disorders. Mutations in FOXP2 itself were also known to affect speech and language; the gene was first identified in members of a family suffering from language problems who were found to share a genetic mutation.

Frances Vargha-Khadem at University College London has studied patients with FOXP2 mutations, and agrees with the new research. As well as language problems, some of her subjects have changes in the shape of their jaws, mouths and tongues. She thinks that chimps may also have these differences.

“We believe FOXP2 is not only important for the higher order cognitive aspect of language but also for the motor aspect of speech and language,” said Genevieve Konopka, one of the authors of the paper at UCLA.

Previous research indicates that the changes in FOXP2 occurred around 200,000 years ago with the rise of modern humans. Geschwind also suggests that several of the related genes may have evolved together. Preliminary studies have shown signs that they too emerged relatively recently.

Scientists are now keen to further study FOXP2 and the genes that it affects. Geschwind believes this could eventually lead to breakthroughs in treatment for disorders such as autism and schizophrenia, which affect language skills.

The study was funded by the National Institute of Mental Health, the A.P. Giannini Foundation and the National Alliance for Research on Schizophrenia and Depression.

Wednesday, February 8, 2006

The H5N1 Avian Flu virus, also known as Bird Flu, has been found in Nigeria by Italian scientists. Tests done on samples in a laboratory confirm that the strain is the one that can kill people, although no human cases have been reported said the Paris-based United Nations body. This is the first time is has appeared on the continent.

Reports say tests of the virus closely resemble the virus in Asia. The virus has been discovered in poultry flocks in a large Nigerian farm. “It is the first report of the disease in Africa,” the Paris-based World Organization for Animal Health (OIE) said on Wednesday.

“It’s going to be very difficult to mount an eradication campaign,” said Dr. Alex Thiermann, president of the OIE’s international animal health code, from Paris, France. “With what we have today, it is a highly pathogenic H5N1 – the same, or very closely related to the previous ones,” said Thiermann. He also added, “a full genetic analysis of sample viruses is expected to be completed by late Thursday.”

Maria Zampaglione of the Paris-based OIE said “An outbreak has been detected. A local poultry farm keeping 46,000 birds was affected, of which 42,000 were infected and 40,000 of those, died.” The farm is located in Jaji, which is a village in the northern state of Kaduna.

“The farm is located near the Niger Delta, one of the largest over-wintering areas for wild birds in Africa.” said Thiermann.

Quarantine measures on the control and movement of poultry have been taken, and the farm has been disinfected said Nigerian authorities.

“However, it is too early to say how serious the outbreak is and how big its spread could be,” said Ilaria Capua of the Italian bird flu centre in Padua. “We have to be cautious in evaluating the possible implications of these findings.”

In Rome, Samuel Jutzi, a director of the UN’s Food and Agriculture Organization said, “if the situation in Nigeria gets out of control, it will have a devastating impact on the poultry population in the region. It will seriously damage the livelihoods of millions of people and it will increase the exposure of humans to the virus.”

“When you have 46,000 chickens in a house, usually you have some degree of biocontainment…So these (chickens) are not likely to be the ones to first encounter migratory waterfowl,” Thiermann said.

Wildlife circles have been debating on whether or not wild birds are spreading the virus around the globe. Experts believe they are playing a role but most believe poultry movement, poultry products and poultry manure is the main cause of the spreading of the virus.

“But probably not in this case,” said Thiermann. “While it’s too early to blame the wildlife, it’s very likely to be in an area that’s remote enough that it’s not likely to be associated with international trade.”

OIE spokeswoman Zampiglione also said, “Experts had been fearing an African outbreak for months. The conditions there are more likely to lead to contagion from birds to man.”

Tuesday, April 20, 2021

Wikinews extended invitations by e-mail on March 23 to multiple candidates running in the Texas’ 6th congressional district special election of May 1 to fill a vacancy left upon the death of Republican congressman Ron Wright. Of them, the office of Democrat Daryl Eddings, Sr. agreed to answer some questions by phone March 30 about their campaigns and policies. The following is the interview with Ms Chatham on behalf of Mr Eddings, Sr.

Eddings is a federal law enforcement officer and senior non-commissioned officer in the US military. His experience as operations officer of an aviation unit in the California National Guard includes working in Los Angeles to control riots sparked by the O. J. Simpson murder case and the police handling of Rodney King, working with drug interdiction teams in Panama and Central America and fighting in the Middle East. He is the founder of Operation Battle Buddy, which has under his leadership kept in touch with over 20 thousand veterans and their families. He was born in California, but moved to Midlothian, Texas. He endeavours to bring “good government, not no government”. Campaign manager Faith Chatham spoke to Wikinews on matters ranging from healthcare to housing.

An Inside Elections poll published on March 18 shows Republican candidate Susan Wright, the widow of Ron Wright, is ahead by 21% followed by Democrat Jana Sanchez with 17% and Republican Jake Ellzey with 8% with a 4.6% margin of error among 450 likely voters. The district is considered “lean Republican” by Inside Elections and voted 51% in favour of Donald Trump in last year’s US presidential election. This is down from 54% for Trump in 2016’s presidential election, the same poll stated.