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Saturday, March 19, 2011

Menthol's cool feeling comes at a price - Came giác mát của thuốc lá có Menthol hại nhiều hơn lợi

Menthol's cool feeling comes at a price - Came giác mát của thuốc lá có Menthol hại nhiều hơn lợi

Menthol cigarettes are favored by new smokers.

Menthol seems fresh, cool, natural -- and that's what makes it dangerous. Added to the tobacco in cigarettes, menthol makes the biologically nightmarish act of inhaling smoke feel much better than it should.

Tinh dầu bạc hà có vẻ tươi, mát mẻ, tự nhiên - và đó chính là điều làm cho nó nguy hiểm. Khi được tẩm vào sợi thuốc trong trong những điếu thuốc lá, tinh dầu bạc hà làm cho người hút thấy những tác hại về mặt sinh học của việc hít khói thuốc lá trở nên nhẹ nhàng hơn nhiều so với thực tế

Just ask the panel charged with advising the Food and Drug Administration on the additive.

Chỉ cần hỏi ban phụ trách tư vấn cho Cục Quản lý Thực phẩm và Dược phẩm (FDA ) về chất phụ gia sẽ rõ.

The panel has delivered to the FDA a lengthy report about the public health effect of menthol in sticks of smokable tobacco.

Ban phụ trách này đã gởi cho FDA một báo cáo rất dài về tác hại đối với sức khỏe của công chúng của tinh dầu bạc hà những điếu thuốc lá có khói.

The report poses the following questions:
-- "Does menthol have cooling and/or anesthetic properties that moderate the harshness of cigarette smoke?"
-- "Does menthol make low-tar, low-nicotine cigarettes more acceptable to smokers?"
-- "Does menthol have an effect on nicotine or nicotine-derived nitrosamine metabolism?"
-- "Is it biologically plausible that menthol increases the addictiveness of cigarette smoking?"

Bản báo cáo đặt ra các câu hỏi sau:
- "Liệu tinh dầu bạc hà có tính chất làm mát và/hoặc gây tê, mà làm điều hòa mức độ mùi gay gắt của khói thuốc lá hay không?"
- "Tinh dầu bạc hà có thể làm các loại thuốc lá có mức hắc ín thấp và nicotine thấp chấp nhận được đối với người hút thuốc hay không?"
- “Tinh dầu bạc hà có ảnh hưởng đến chuyển hóa nitrosamine (một dẫn xuất từ nicotine) hay không?"
- "Có đúng rằng tinh dầu bạc hà về mặt sinh học có vẻ như làm tăng tính gây nghiện của hút thuốc lá hay không ?"

Yes, are the answers, in long-winded but enlightening form, to each one.
And that's simply the report's look at individual smokers. At that point, the authors were just getting warmed up.



Đúng thế, đó là câu trả lời, với hình thức dài dòng, nhưng sáng tỏ, cho mỗi một câu hỏi trên. Và đó chỉ đơn giản là báo cáo xem xét những người hút thuốc cá nhân. Vào thời điểm này, các tác giả chỉ mới bắt đầu nghiên cứu.

There's also data showing menthol cigarette use is common among women, minorities, the unemployed, poor people and, most alarming, adolescents. Young people, it seems, like menthol quite a bit. And who can blame them? New smokers need all the help they can get.

Ngoài ra còn có dữ liệu cho thấy sử dụng thuốc lá có tinh dầu bạc hà rất phổ biến ở phụ nữ, các nhóm thiểu số, người nghèo và thất nghiệp, đáng báo động nhất là vị thành niên. Những người trẻ có vẻ cũng khá thích tinh dầu bạc hà. Và ai có thể trách họ? những người mới tập hút thuốc cần tất cả mọi sự giúp đỡ mà họ có thể nhận được.

There's more in the report of course, so very much more.
But let's focus on the big picture.

Báo cáo này còn có nhiều nội dung khác nữa, rất nhiều. Nhưng chúng ta hãy tập trung vào những vấn đề lớn.

The report asks: "Does the availability of menthol cigarettes increase the prevalence of smoking in the population, beyond the anticipated prevalence if such cigarettes were not available? In subgroups within the population?"

Báo cáo hỏi: "Liệu sự sẵn có của thuốc lá có tinh dầu bạc hà có làm tăng tỷ lệ hút thuốc lá trong dân số hay không, có vượt quá tỷ lệ dự đoán nếu những điếu thuốc lá này không có sẵn hay không? Cả ở các nhóm nhỏ trong dân cư?"

And the report answers: "The evidence is sufficient to conclude that it is more likely than not that the availability of menthol cigarettes increases the likelihood of experimentation and regular smoking beyond the anticipated prevalence if such cigarettes were not available, in the general population and particularly in African Americans."

Và báo cáo đã trả lời: "Bằng chứng là đủ để kết luận rằng nó có nhiều khả năng sự có sẵn thuốc lá bạc hà làm tăng khả năng thử hút thuốc và hút thuốc thường xuyên vượt quá tỷ lệ dự đoán nếu không có sẵn thuốc lá bạc hà, trong quần thể nói chung và đặc biệt ở những người Mỹ gốc Phi. "

Thus does the Tobacco Products Scientific Advisory Committee make its way toward its recommendation to the FDA: "Removal of menthol cigarettes from the marketplace would benefit public health in the United States."

Do đó liệu Ủy ban tư vấn khoa học về sản phẩm thuốc lá có tiến hành kiến nghị với FDA: "Loại bỏ thuốc lá tinh dầu bạc hà trên thị trường sẽ có lợi cho sức khỏe cộng đồng tại Hoa Kỳ."

Friday's delivery of this recommendation puts the ball in the Food and Drug Administration's court. The agency can't say it lacks facts.

Những khuyến cáo của bản báo cáo hôm thứ sáu là đưa những dữ liệu này cho Hội đồng quản lý Dược và thực phẩm. Các cơ quan này không thể nói nó thiếu thực tế.

Translated by

tndinhdat@yahoo.com.vn




How do cell phones affect young brains? Điện thoại di động ảnh hưởng não thế nào?


How do cell phones affect young brains? Điện thoại di động ảnh hưởng não thế nào?

Cell phone safety warnings are generally designed for a large man with

a big head who talks less than half an hour a day.

The average toddler's head, however, weighs about half as much and is

far more susceptible to the microwave radiation the phone emits, said

environmental health expert Devra Lee Davis, founder of the

Environmental Health Trust, which campaigns for safer cell phone use.

As the debate over cell phones and cancer continues to rage, concern

is growing over the effects of the phones — as well as devices such as

the iPad — on children.

A recent study published in the Journal of the American Medical

Association found that pressing a cell phone to the ear for 50 minutes

altered the brain activity in 47 adult volunteers.

The study doesn't answer the million dollar question: whether the

change in brain activity causes any harm.

The wireless industry group says no research has proven cell phones to

be dangerous.

The National Cancer Institute, meanwhile, says there is no consistent

link between cell phones and cancer.

But the NCI also notes that there's currently no data on cell phone

use and risk of cancer in children and that children may be at a

greater risk because their nervous systems are still developing at the

time of exposure.

Meanwhile, cell phone use by children and adolescents is increasingly

rapidly.

Experts worry that children's brains, encased in a thinner skull, may

be more vulnerable to the effects of the radiation emitted by the

phones.

Dr. Nora Volkow, the lead author of the JAMA study, said modeling

studies have shown that a child's brain would absorb more radiation

than those of adults. But Volkow said she's unaware of studies that

have looked at the different developmental effects.

Some studies have suggested that the radiation can cross or affect the

entire brain of children, who are still developing, versus a

particular area in adults," said Dr. Stephanie Wagner, co-medical

director of the neuro-oncology program at Indiana University Health

and the IU Simon Cancer Center in Indianapolis.

But studies looking at the effects of electromagnetic radiation in

children and the risk of epilepsy and behavioral problems such as

attention deficit disorder and aggressive behavior showed conflicting

results, Wagner said.

Still, why take a chance, Volkow said.

She suggested that parents "teach their children to use their cell

phones with a wired earphone and/or use the speakerphone mode and to

avoid putting their cell phones directly on their ear."

jdeardorff@tribune.com



Concerned?



If so, try these tips, starting with the most drastic, to limit

exposure.

•Avoid white noise baby apps. Some children are falling asleep to

white noise played from iPhones or Blackberries under their pillows.

But the phones must stay on for the app to work. "A cell phone is a

two-way microwave radio," said Davis. "That means infants stay asleep

with their brains being radiated by the phones all night long."

•Don't let toddlers or young children use cell phones. Teenagers

should limit use to head sets or texting to keep the antenna away from

the brain, said Wagner. Or shift the phone between ears.

•Review SAR levels. The Specific Absorption Rate (SAR) is a measure of

the amount of radio frequency (RF) energy absorbed by the body when

using the handset. Before you buy your child a phone, search the

government's cell phone database (fcc.gov/cgb/sar).

•Follow the "one-inch" rule. Most cell phone manuals advise holding

the phone "at least one inch" away from the head.

•Don't carry a cell phone on your body. Place the phone inside a bag

or some type of holster; this will help block the radiation from

reaching the body.

•Limit phone use when the signal is weak. The radiation increases as

the device searches for a signal.

Worries outweigh radiation threats in U.S. Lo lắng nhiều hơn so với đe dọa phóng xạ ở Mỹ

Worries outweigh radiation threats in U.S. Lo lắng nhiều hơn so với đe dọa phóng xạ ở Mỹ

All that worrying might cause more harm than the radiation from the Japan nuclear accident, experts say. A look at some common concerns.


Radiation threat

In Japan, a baby is checked for radiation exposure before entering an evacuation center in Fukushima. Meanwhile, Californians are worrying that radiation plumes will find their way to American shores. (AP Photo / Kyodo News)


With reports that a radiation plume from the Fukushima Daiichi nuclear plant could reach Southern California as soon as Friday, worried citizens have been hoarding potassium iodide pills, wondering if it's OK to go outside and otherwise fretting over an invisible, and somewhat unpredictable, threat.

But all that worrying might cause more harm than the radiation itself, experts say. Here are some answers to common concerns.

How much radiation do scientists think will arrive here?
No one knows yet — but probably not a whole lot. It's unclear what's happening at the Japanese power plant, and whatever radiation escapes has to travel thousands of miles to reach U.S. shores. Over that distance, it will be greatly diluted, if it gets here at all.

Photos: In Japan, life amid crisis

In fact, the winds have been shifting, often blowing westward, back toward Japan, rather than toward the U.S., California officials said in a news conference Thursday. "We are not in Japan," said Dr. Jonathan Fielding, director of Public Health for Los Angeles County. "We are not within 10 miles of the reactor. We are 5,000 miles away — and we know a lot about dispersal patterns over that distance."

How much risk will any radiation that reaches here pose?

Not much. Gregory Jaczko, chairman of the Nuclear Regulatory Commission, an independent agency that regulates U.S. commercial nuclear power plants, told reporters Thursday that the basic science involved suggested that "there can't be any risk or harm to anyone here in the United States, or Hawaii, or any of the other [U.S.] territories."

Dr. Kei Iwamoto, of the faculty of the Division of Molecular and Cellular Oncology at UCLA, told The Times that he believed the amount of radiation from Japan that a person in California might be exposed to will be very low — perhaps around one microsievert.

To put that in perspective, people get some amount of radiation every day. Humans are exposed, on average, to 3,000 microsieverts of natural background radiation per year, according to the Centers for Disease Control and Prevention. One dental X-ray would add 40-150 µSv to that baseline. A CT scan of the abdomen, according to the Food and Drug Administration, would tack on another 8,000 µSv — more than 2 1/2 years of background radiation.

Did radiation reach here from Chernobyl? What happened then?

Yes, a tiny amount did reach the United States. But its health effects were miniscule, if they existed. "The radiation from the 1986 accident was negligible from a health standpoint. I know of no evidence that that accident caused any increase in cancer in this country," Iwamoto said.

What about kids? I've heard they're more sensitive to radiation.

That is true. "Kids are more vulnerable to radiation for a couple of reasons," said Dr. William Hendee, a radiation physicist with the Medical College of Wisconsin. "Their organs and tissues are growing and developing. Growing and developing cells are more susceptible to radiation. Kids also have a longer lifespan."

So should I keep them away from school?

No. Radiation levels are not likely to get very high. There is no reason to keep your kids out of school.

Should I take iodine tablets or eat iodized salt? It can't hurt, can it?

Well, yes, it can hurt. The tablets can be risky for some people — especially pregnant women. There is no reason to take iodine tablets at this point, said California officials at the news conference.

Indeed, potassium iodide is not recommended at all until radiation levels hit the tens of thousands of microsieverts. Levels won't reach anywhere approaching that level here.

In cases of true radiation exposure — for example, for people living close to the reactors in Japan — the benefits of potassium iodide outweigh the risks. The tablets can protect the thyroid from exposure to radioactive iodine-131 by "filling up" the gland and preventing it from taking up the radioactive iodine.

But potassium iodide can be harmful to people who are allergic to the substance or who have the skin disorders dermatitis herpetiformis or urticaria vasculitis, according to the Centers for Disease Control and Prevention. Pregnant women and infants should not be given potassium iodide because it could cause a serious thyroid disorder in infants. The supplements can cause some side effects including nausea, rashes and inflammation of the salivary glands.

As for eating iodized table salt to ward off the effects of radiation, that might work, but you'd have to gobble a great deal of the stuff — 3 1/2 pounds a day, according to the Salt Institute, an industry group — to reach the 130 milligrams of iodine you'd need. Even the institute said, in a statement, that this was not a good primary defense against radioactive fallout. That's saying something. Don't do it.

Would wearing a mask help me?

Sure, if it gives you peace of mind. "Masks would reduce a bit of the inhalation, but the amount of radioactive fallout is going to be so tiny," Hendee said. "For someone who is concerned or worried, if they felt better wearing a mask, they should wear a mask. I don't think it will reduce their risk, because the risk is already so low."

Should I stay indoors?

That's probably not necessary, unless local authorities alert you to do so. Currently, federal officials aren't recommending it.

What contingency plans do local and national health authorities have?

Although national health authorities defer to state governments, they will issue recommendations based on the severity of radiation levels, said Robert Taylor, a spokesman for the Nuclear Regulatory Commission. Possible recommendations include evacuating areas within 10 miles of a nuclear power plant, warning people to take shelter and close all doors and windows, and advising residents to consume potassium iodide tablets. "There's no need for U.S. citizens to take any protective measures at this time," he added.

What can I do to be safer?

Until more is known about the threat radiation from the nuclear plant might pose in California and beyond, your best bet is to get yourself prepared — for any expected emergency. Assemble your earthquake kit. Install gas shut-off valves, if your house doesn't already have them, "rather than going out and buying potassium iodide, I would encourage everyone to go out and buy three to five days of food and water, so that when we have our earthquake, you can be self-sufficient," said Howard Backer, interim director of the California Department of Public Health, at the news conference.

Most of all, address the health threats that you can control. According to the federal government, almost 1.5 million Americans die each year of heart disease or tobacco-related diseases. The best bang for your buck might be throwing away the cigarettes, exercising and improving your diet.

Photos: In Japan, life amid crisis

More: Articles, videos and graphics on radiation exposure, nuclear crisis

eryn.brown@latimes.com


Let's Move! Can it make a dent in the childhood obesity problem? Hãy vận động! Có thể nó cải thiện vấn đề béo phì ở trẻ em?


Let's Move! Can it make a dent in the childhood obesity problem? Hãy vận động! Có thể nó cải thiện vấn đề béo phì ở trẻ em?

Michelle Obama's public awareness program aims to improve the health of the nation's children, and maybe even their parents' health. Experts weigh in on its chances and the hurdles it must overcome.
Can childhood obesity be eliminated in a generation? Will we ever get our children away from video games and into the park? Is there anything to be done about neighborhoods with a plethora of fast-food outlets and a dearth of options for eating healthfully?

A year ago, First Lady Michelle Obama launched the Let's Move! campaign from the front lawn of the White House.

She outlined her plan to focus on four primary objectives: educating and empowering parents, providing more-healthful foods in schools, increasing access to healthful foods in underserved neighborhoods and encouraging more physical activity.

Among the specifics, Obama set the goal of doubling participation in the HealthierUS School Challenge, which recognizes schools in the National School Lunch Program that have worked to promote more-healthful school environments. She also announced her intention of working with food retailers to stock more-healthful fare, and challenged kids and adults to exercise five days a week.

Many childhood obesity and nutrition experts believe that the first lady's initiative is an important step in raising national awareness about childhood obesity, which in 2008 reached an all-time high of 17% among kids age 2 through 19, according to the federal Centers for Disease Control and Prevention.

"Let's Move! is first time food issues have had this kind of legitimacy at this high a government level," said Marion Nestle, nutrition professor at New York University and the author of the book "Food Politics." "Just doing that is an enormous, enormous contribution."

But in a culture where junk food abounds and outdoor play continues to lose ground to controllers and computers, some experts are skeptical as to how successful the public awareness program — which also works to allocate funding for government agencies involved in nutrition and health, such as the Department of Health and Human Services — can be.

We spoke to five specialists in the fields of nutrition and childhood obesity to get their take on each aspect of the Let's Move! campaign:

Empowering parents

In addition to purchasing food for the family, parents and caregivers serve as role models for healthy behavior. For that reason, said Dr. William Roberts, the president of the American College of Sports Medicine, reaching adults with information about good health practices, and encouraging them to examine their own habits, is a key part of battling childhood obesity.

"The apple doesn't fall far from the tree," said Roberts, who has a private practice in Minnesota. "I can often see who will have trouble with obesity and who won't from looking at the parents; obese parents have obese kids, and active parents have active kids."

According to a report by a task force implemented by President Obama to oversee Let's Move!, the campaign has worked with a handful of government agencies to help parents make more informed decisions. The Food and Drug Administration has begun to explore the effects of putting nutrition labels on the front of food packaging, and how it can be effectively implemented. The Department of Agriculture will soon release a new food pyramid, condensing its dietary guidelines. And Michelle Obama herself has urged restaurants across the country to provide nutritional information about their dishes.

Although the program is a good start, said James Hill, the director of the Colorado Nutrition Obesity Research Center, getting parents to change their behavior is likely to be much more challenging than putting numbers on menus and packaging.

"We're talking about changing what people eat, their physical activity levels," he said. "This has been very, very difficult to do and quite frankly, we have more failure than success."

A program like Let's Move! can help, he said, but "at the end of the day, it's a cultural shift, the way smoking is now unacceptable, not wearing seatbelts is now unacceptable. It's an amazing challenge and it's going to be a lot for any one program to do alone."

Getting healthful foods in schools

In December, President Obama signed the Healthy, Hunger-Free Kids Act of 2010, which provides funding for federal school meals and child nutrition programs and is reauthorized every five years. Informed, in part, by the Let's Move! objectives, the bill requires national standards to be set for food sold at schools, including meals and vending machine snacks.

Margo Wootan, director of nutrition policy at the Center for Science in the Public Interest, worked on the bill, and said that it's passage was a victory for Let's Move! program.

Getting junk food out of schools is "something we've wanted to do for decades," she said.

To ensure compliance with the bill, one school per district nationwide will be audited every three years, said Wootan.

"The review that they do is so comprehensive and labor intensive [that] it's hard for them to do many more schools," she said, adding that she'd like to see the review process more streamlined.

Some experts, however, see the bill as falling short of what kids need.

"I think we need universal school meals," said Nestle, referring to lunches provided to all children regardless of income, "and anything short of that is an enormous compromise."

Improving access to healthful and affordable food

Areas that are dominated by fast-food restaurants and have a dearth of healthful options are another target of the Let's Move! campaign.

The program made a significant stride in January, when Wal-Mart agreed to join Let's Move! by stocking its shelves with more-healthful more-clearly labeled products. The collaboration, said Nestle, represents an important step towards getting buy-in from the food industry, which has often viewed junk food as more profitable than more nutritious fare.

"Anything Wal-Mart does is going to have an enormous effect on other food companies, because they are going to have to follow suit," she said.

Still, said Hill, the effort within the food industry is "not as coordinated as we might like it to be." And it remains to be seen whether more-healthful options will lead to more-healthful choices.

"The question is, are people just waiting for healthy food, and once you bring it in they will eat it?" he said. "I suspect that's not the case. Getting people to make these healthy choices and sustain them over time is very much a challenge."

Increasing physical activity

Without an increase in physical activity, overweight kids are likely to remain that way. To that end, Let's Move! has teamed up with national sports organizations, including the National Football League and Major League Baseball, to develop public service announcements to motivate kids who may see professional athletes as role models.

But many believe that increasing physical activity represents the biggest challenge facing the program.

"I think it's going to be easier to solve the food problem then the physical activity problem," said Hill.

Roberts suggests that schools need to support gym and recess and that city planners should keep in mind the development of play areas when "building towns and living spaces." Ultimately, though, there's no proven way to entice the unmotivated to get off the couch, he said.

"I don't know how you can get people to exercise who aren't willing to or don't want to," Roberts said. "In the end, it has to be an individual decision that you're going to make the changes you need."

Looking ahead

As the Let's Move! campaign enters its second year, it's not without political detractors. Some have criticized the first lady and the program for what they suggest is an overstepping of government bounds.

On his radio program earlier this year, talk show host Rush Limbaugh said that Obama was "urging, demanding, advocating, requiring what everybody can and can't eat."

But health experts continue to suggest that Let's Move! is on the right track, if perhaps not far-reaching enough.

"The obesity epidemic is caused by a toxic environment," said David Ludwig, who developed the Optimal Weight for Life program at Children's Hospital Boston. To truly combat it, he says, government involvement needs to include providing subsidies for farms that grow nutritious foods, as well as better funding for schools so that food quality and physical education aren't sacrificed.

Wootan adds that marketing that targets children, such as television commercials and kid-themed packaging, also needs to be curtailed.

Hill believes that until more research is done to find creative solutions to the childhood obesity epidemic, the problem may not be going anywhere.

"I think things may get worse," he said, "before they get better."

Russia's Shifting Political Landscape CẢNH QUANG CHÍNH TRỊ ĐANG THAY ĐỔI CỦA NƯỚC NGA



Russia's Shifting Political Landscape
CẢNH QUANG CHÍNH TRỊ ĐANG THAY ĐỔI CỦA NƯỚC NGA
February 1, 2012
1/2/2012
STRATFOR
STRATFOR
Part 1: An Overview of Political Changes
Russia's political landscape has been relatively calm and consolidated for the past decade under former President and current Russian Prime Minister Vladimir Putin. However, recent months have seen instability rise sharply, with a purge in the government, a shift in parliamentary election results and large protests in the streets. None of these is new to Russia, but these and other factors are converging and creating changes in Russia's political landscape.
Tổng quan về những thay đổi chính trị
Bức tranh chính trị của Nga đã tương đối êm đềm và thống nhất trong thập kỷ vừa qua dưới sự lãnh đạo của cựu Tổng thống và hiện là Thủ tướng Vladimir Putin. Tuy nhiên, trong những tháng gần đây, tình hình bất ổn đã đột ngột nổi lên với sự thanh trừng trong chính phủ, việc thay đổi kết quả bầu cử quốc hội và nhiều cuộc biểu tình lớn trên đường phố. Không có vấn đề nào trong số trên là mới đối với Nga, nhưng các vấn đề này cùng các yếu tố khác đang hội tụ và tạo ra những thay đổi trong bức tranh chính trị Nga.