Tragedy, shock, deadliest, horrific, they seem like typical words that are getting pitched around right now by news about Virginia Tech. I've just seen something in the Google Earth images of Darfur. 9 more villages destroyed since last week. Each of them had an estimated population of 300. Now some survivors are strolling somewhere in the Sudan! And in Iraq, a suicide bomber killed 10 people today, just 24 hours after attacks killed 171. Darfur, Baghdad, Virginia Tech, what has happened this world? No answer!
Thứ Tư, 18 tháng 4, 2007
Entry for April 19, 2007
Tragedy, shock, deadliest, horrific, they seem like typical words that are getting pitched around right now by news about Virginia Tech. I've just seen something in the Google Earth images of Darfur. 9 more villages destroyed since last week. Each of them had an estimated population of 300. Now some survivors are strolling somewhere in the Sudan! And in Iraq, a suicide bomber killed 10 people today, just 24 hours after attacks killed 171. Darfur, Baghdad, Virginia Tech, what has happened this world? No answer!
Thứ Hai, 26 tháng 3, 2007
Entry for March 27, 2007
WASHINGTON (Reuters) -- It's the junk food junkie's wildest dream come true -- pizza as health food.
University of Maryland food chemists said Monday that they had found ways to enhance the antioxidant content of whole-grain wheat pizza dough by baking it longer at higher temperatures and giving the dough lots of time to rise.
Antioxidants are substances that protect cells from damage caused by unstable molecules known as free radicals. Some experts believe antioxidants can lower the risk of cancer, heart disease and other ailments.
Liangli Lucy Yu, a food chemistry professor, said the findings arose from broader research into ways to improve health-promoting properties of wheat-based food products.
"The reason that we chose pizza is just because it is a very popular food product, not only in the U.S. but worldwide," researcher Jeffrey Moore added.
"So we thought if we could find ways to improve (its antioxidant) properties, doing this for such a product could have a larger impact on public health," Moore added.
But Moore had a slice of advice for pizza aficionados who might want to cover their crust with mounds of fatty toppings such as extra cheese, pepperoni, sausage and ground beef.
"If you're adding back all these other things that have potential negative health consequences, then you're negating anything that you're adding in terms of (health) value," Moore said.
The research was served up at a meeting of the American Chemical Society in Chicago, a mecca for deep-dish, thick-crust pizza.
The researchers experimented with baking temperatures, baking time and fermentation time -- the time the pizza dough is given to rise.
A hotter oven
Antioxidant levels rose by up to 60 percent with longer baking times and up to 82 percent with higher baking temperatures, depending on the type of wheat flour and the antioxidant test used, they said. The precise mechanisms involved are unclear, they said.
Baking time and temperature can be increased together without burning the pizza when done carefully, the researchers said. They used oven temperatures from 400 to 550 degrees Fahrenheit (204 to 287 degrees Celsius), and baking times from 7 to 14 minutes.
They looked at fermentation times up to two full days, and found that longer periods in some cases doubled the dough's antioxidant levels. This probably stemmed from chemical reactions caused by yeasts in the dough that had more time to release the antioxidant components, Moore said.
A common fermentation time is about 18 hours, Moore said.
The study used only whole wheat dough. Most of the antioxidants in wheat are in the bran and endosperm components that are generally removed in refined flour, Moore said. Thus, longer and hotter baking and longer fermentation likely would be less effective in making more healthful pizza with refined flour, he said.
The study was funded by the U.S. Department of Agriculture and grain organizations, but not by the pizza industry.
Thứ Tư, 14 tháng 3, 2007
Nên mua hoa hồng thường xuyên hơn
| Ảnh: Nature. |
Người ta vẫn nói rằng người lạc quan thường nhìn thế giới qua lắng kính màu hồng. Nay cả mùi thơm của hoa hồng cũng mang lại lợi ích cho con người.
Hít một hơi hoa hồng khi đang học một nhiệm vụ nào đấy và ngủ trong mùi hương hoa hồng đó sẽ giúp ghi nhớ được lâu.
Nhà nghiên cứu Jan Born tại Đại học Lübeck và cộng sự đã cho mọi người ngửi mùi hoa hồng khi họ ghi nhớ vị trí của các bức hình khác nhau trong một hình vuông. Một nửa được ngửi cùng mùi đó khi đi ngủ, nửa còn lại thì không. Khi được kiểm tra lại vào ngày hôm sau, những ai đã có giấc ngủ màu hồng thì nhớ được 97% vị trí của các bức ảnh, còn những người không ngửi mùi hương thì đạt 86%.
Kết quả cũng ủng hộ giả thuyết rằng ký ức được củng cố trong não trong giấc ngủ. Các nhà nghiên cứu cho rằng một phần của não gọi là hippocampus ghi nhận những thứ chúng ta mới học để lưu trữ dài hạn. Trong giấc ngủ, những ký ức này được kích hoạt và chuyển sang vỏ não.
Mùi hương vẫn được biết đến là có ảnh hưởng mạnh mẽ lên hippocampus. Born và cộng sự phỏng đoán rằng một mùi nào đó có thể giúp kích hoạt quá trình khởi động trong giấc ngủ, giúp việc lưu trữ ký ức dài hạn trở nên hiệu quả hơn. Các cuộc kiểm tra của họ đã ủng hộ giả thuyết này.
Nhưng chỉ ngủ trong căn phòng hương hoa hồng thì chưa đủ để gây hiệu quả, bởi vì thời điểm tiếp xúc với mùi cũng rất quan trọng.
Những tình nguyện viên trong nghiên cứu cần phải tiếp xúc với mùi vào giấc ngủ slow-wave, khi mà vùng não hippocampus được kích hoạt để chơi lại các ký ức. Còn đưa mùi hoa hồng vào mũi trong giấc ngủ REM, khi giấc mơ thường xảy ra, thì không có tác dụng gì. Nhưng bởi mọi người sẽ quen thuộc với mùi rất nhanh chóng, nên hương hoa hồng cần phải được bật lên và tắt đi vào đúng thời điểm để tạo ra hiệu quả đối với ký ức.
Ngoài ra, kỹ thuật này cũng chỉ có tác dụng với một số kiểu học. Nó sẽ không giúp ghi nhớ các kỹ năng như chơi piano hay đạp xe đạp bởi vì các ký ức này không phụ thuộc vào vùng hippocampus.
Vấn đề là mua cho ai bây giờ? Đang cần quên.
Thứ Tư, 24 tháng 1, 2007
Chia - Nguyễn Trọng Tạo
Chia cho em một đời tôi
Một cay đắng
một niềm vui
một buồn
Tôi còn cái xác không hồn
Cái chai không rượu tôi còn vỏ chai
Chia cho em một đời say
Một cây si
với
một cây bồ đề
Tôi còn đâu nữa đam mê
Trời chang chang nắng tôi về héo khô
Chia cho em một đời Thơ
Một lênh đênh
một dại khờ
một tôi
Chỉ còn cỏ mọc bên trời
Một bông hoa nhỏ lặng rơi mưa dầm ...
1989
Thứ Năm, 18 tháng 1, 2007
Entry for January 19, 2007
What 20 top jobs pay
Salary study shows that top pay not always in largest metros
Computer and information systems managers earn more in San Jose than any other U.S. market. That makes sense, given the concentration of high-tech firms in Silicon Valley.Geography can explain a lot about pay. Financial managers do better in Bridgeport, Conn., and nearby New York City than anywhere else. That stands to reason, since New York is the nation's financial capital.
But not all of the highest-paying, upscale jobs are found in the nation's largest metros, according to a new Bizjournals study.
For example:
Greensboro, N.C. -- highest average pay for dentists at $189,560.
Worcester, Mass. -- highest average pay for family doctors at $176,370.
Dayton, Ohio -- highest average highest pay for optometrists at $161,930.
The Bizjournals study compared the average salaries for 20 high-paying occupations in 75 major metropolitan areas, using raw data from the U.S. Bureau of Labor Statistics. Detailed profiles of all 20 occupations covered by the study can be viewed here. And what the 20 occupations pay in the 75 metros begins here.
The study refutes the stereotype that high-paying jobs are concentrated in the nation's largest metropolitan areas.
Tiny Albany, N.Y., for example, outperforms New York City in five categories. The typical Albany surgeon earns 8 percent more than his or her counterpart in the big city 150 miles to the south. Albany offers higher salaries than New York City for chemical engineers, college administrators, dentists and family doctors, too.
The study demonstrates the importance of comparing cost-of-living differences between two markets.
Chemical engineers in Los Angeles earn 3 percent less than workers in the same field in New York City. But it costs 9 percent less to live in suburban Orange County, Calif., than on Long Island, according to Salary.com. That means the typical chemical engineer actually gets more for the buck in the Los Angeles area.
Bizjournals focused on 20 occupations that offer high wages to sizable pools of employees. Each job fits into the top 10 percent of the national pay scale, as well as the upper half in terms of total employment.
The study group consisted of America's 75 largest metropolitan areas, ranging from New York City with 18.8 million residents to Greensboro, N.C., with 680,000. The group's total population was 182 million, about 60 percent of the national total.
All figures used in the study were collected last year by the U.S. Bureau of Labor Statistics. The bureau's occupational profiles can be accessed at http://www.bls.gov/oes/current/oes_stru.htm.
San Jose has the highest salary levels in seven of the 20 categories. They are: chief executives, computer and information systems managers, electrical engineers, industrial production managers, lawyers, marketing managers, and sales managers.
Bridgeport-Stamford is the only other metro to lead more than a single category. It is No. 1 on five pay scales: construction managers, financial managers, general and operations managers, public relations managers, and securities and financial services sales agents.
The 20 occupations covered by Bizjournals' study are concentrated in the managerial, financial, technical and medical fields. All but one category is led by a metro with an average salary above $100,000. Electrical engineers are the exception, topping out at $94,330 in San Jose.
The most competitive categories are chief executives and surgeons, where the average salaries for all metros reach six figures. San Jose leads chief executives at $179,720, while Charlotte is first for surgeons at $195,150.
Thứ Hai, 15 tháng 1, 2007
Entry for January 15, 2007
Monday January 15, 2007 - 12:55am (PST)
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