直擊大家樂 無牌燒味勁邋遢 - 20121025 - 蘋果日報

http://hk.apple.nextmedia.com/news/art/20121025/18048363


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Article: Feces in your meat

Feces in your meat - Examiner

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Article: Safe food expats' top news story

Safe food expats' top news story - Shanghai Daily

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Article: Smoked Salmon Recalled For Listeria By Sam's Club

Smoked Salmon Recalled For Listeria By Sam's Club - The Inquisitr

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Article: PathoGenetix Hires Food Safety Testing Expert John W. Czajka as Vice...

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Article: Canadian scientists challenged to find rapid tests for dangerous meat bacteria

Canadian scientists challenged to find rapid tests for dangerous meat bacteria - The Toronto Star

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厦大发现地沟油检测新方法

http://kwanlab.bio.cuhk.edu.hk:8080/FS/newsPage.jsp?id=2222833 厦大发现地沟油检测新方法

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Excellent Idea of the Day: Choosing Red Wine Over White - Discovery News

http://news.discovery.com/human/excellent-idea-red-white-wine-121207.html

Excellent Idea of the Day: Choosing Red Wine Over White

8 December, 2012 12:04:00 AM

Jennifer Viegas)

If given the choice between red and white wines this holiday season, go for red, scientists say. A chemical found in red wine may help prevent cancer and other health problems.

A number of studies over the years have linked this chemical, resveratrol, to health benefits. But perhaps the strongest evidence yet will be presented this week at the conference "Resveratrol 2012," held at the University of Leicester through December 7.

SEE ALSO: Taste Sensation: Underwater Wine

"This is the second conference that brings together all the world experts in resveratrol," Karen Brown, a member of the University's Cancer Biomarkers and Prevention Group, and one of the organizers, was quoted as saying in a press release. We have got a fantastic line up covering cancer, heart disease, diabetes, neurological diseases and life extension."

"Having shown in our lab experiments that (resveratrol) can reduce tumor development, we are now concentrating on identifying the mechanisms of how resveratrol works in human cells," Brown added.

The lab experiments, which she refers to, determined that a daily amount of resveratrol equivalent to two glasses of wine can halve the rate of bowel tumors.

For those wishing or needing to avoid alcohol intake, the compound, found in the skins of red grapes, can be purchased in pill form. Such pills, however, lack the numerous other beneficial vitamins and minerals present in red wine. It's also hard to conduct a convivial holiday toast at the dinner table by clinking pills. Just keep any wine consumption in moderation.

SEE ALSO: Forget Space Beer, Order Meteorite Wine Instead

The next step, in terms of research, is to determine the optimum level of resveratrol that humans should ingest.

"It has been shown that high doses of resveratrol may potentially interfere with other medication," Brown explained. "With all the exciting new studies that are being done, especially the clinical trials, I hope we'll have a clearer picture in the next few years."

This week's conference, already underway, includes more than 65 lectures, presentations and posters by different researchers from all over the world.

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Article: China sacks three officials for GMO rice test: Xinhua

China sacks three officials for GMO rice test: Xinhua - Reuters

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Article: CDC - Salmonella Braenderup Infections Associated with Mangoes - Salmonella

CDC - Salmonella Braenderup Infections Associated with Mangoes - Salmonella - www.cdc.gov

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Article: Canada's Public Health Agency worked behind scenes on E. coli scare

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Article: Outbreaks of Foodborne Illnesses Are Becoming Harder to Detect

Outbreaks of Foodborne Illnesses Are Becoming Harder to Detect - Scientific American

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《中国食品安全发展报告(2012)》将于12月5日问世

http://kwanlab.bio.cuhk.edu.hk:8080/FS/newsPage.jsp?id=2086499 《中国食品安全发展报告(2012)》将于12月5日问世

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从酒鬼酒塑化剂事件看食品安全

http://kwanlab.bio.cuhk.edu.hk:8080/FS/newsPage.jsp?id=2081015   从酒鬼酒塑化剂事件看食品安全

Communication and Engagement with Science and Technology: Issues and ... - Google Books

http://www.google.com.hk/books?hl=en&lr=lang_en&id=Dw19mt0x98UC&oi=fnd&pg=PA110&dq=food+safety+china&ots=LtT8P8_AVf&sig=iCWi_vErer9LTaATAzE-aH0CTkA&redir_esc=y#v=onepage&q&f=false


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Regulatory and policy control on food safety in China -- Chung and Wong -- Journal of Epidemiology & Community Health

http://jech.bmj.com/content/early/2012/11/30/jech-2012-201768


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Article: Nanotechnology consumer database with risk information launched

Nanotechnology consumer database with risk information launched - Nanowerk

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Article: Recall: Nearly 5K Pounds of Trader Joe's Chicken and Rice Are Not So Nice

Recall: Nearly 5K Pounds of Trader Joe's Chicken and Rice Are Not So Nice - LAist

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Article: 10 ways fiscal cliff fall could hurt your health

10 ways fiscal cliff fall could hurt your health - CNN Health

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Article: Prepackaged vegetables can be harmful

Prepackaged vegetables can be harmful - Examiner

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识别食物中的常驻细菌

http://kwanlab.bio.cuhk.edu.hk:8080/FS/newsPage.jsp?id=1960674   识别食物中的常驻细菌

Excellent Idea of the Day: TB Tracker Halts Disease's Spread - Discovery News

http://news.discovery.com/human/excellent-idea/tb-tracker-infectious-disease-121129.html

Excellent Idea of the Day: TB Tracker Halts Disease's Spread

30 November, 2012 10:00:00 AM

Jesse Emspak)

Biometric systems are used to track people. A researcher from Microsoft is showing they can also help keep tabs on the spread of tuberculosis, and even stop it.

Partnered with the non-profit project Operation Asha, Bill Thies, who works at Microsoft Research India, developed a way to use a simple fingerprint reader and a netbook to track tuberculosis patients in India.

This may sound big brother-ish, but it's important to make sure TB patients return to local clinics to get their medications. TB is relatively easy to treat and cure, with a standard course of antibiotics. But many patients don't keep taking the drugs because they feel better. "The challenge is to make sure they finish the course of treatment," Thies told Discovery News.

In order to cure a bacterial infection, patients must take enough antimicrobial drugs to kill every last one of the germs. Otherwise, TB sufferers could end up with a drug-resistant strain of the disease.

That outcome is a lot more dangerous to the patient, and worse, it increases the odds that person will infect others.

The fingerprinting system is twofold. First, it identifies the patient. When patient visit local health centers, they place their fingers on a reader, which records the print. The fingerprint reader is connected to a netbook, which also stores the data relevant to that patient.

Second, the netbook uses the local cellular network to send SMS notifications to health-care workers if a patient misses an appointment. When that happens, the health-care worker can go talk to the patient and see what happened.

Thies told Discovery News that the authentication also keeps patients from sending someone else to the local health center in their place.

"Sometimes they will send their wives," he said.

In a neighborhood where poverty is widespread, there is the danger the drugs will be re-sold. They should be taken under supervision in any case, Thies said, because in parts of India many are illiterate. Writing down how to take the proper dose wouldn't help them.

The other big issue is the cost. Thies noted that the fingerprint readers are simple models, as are the computers; the readers are only about $80 each. Both are off the shelf.

So far, Operation Asha has implemented the system across several Indian states. The components are cheap enough that local governments could issue the netbooks and readers for less money than they'd pay for custom-designed hardware. Using the local cell phone network also eliminates the need for high-speed Internet connections.

Operation Asha is looking at applying the same idea to other diseases that require a lot of follow-up, such as HIV, and Thies said there are hospitals in Uganda looking at it as well.

Theis will be giving a presentation on the project at Microsoft's New England Research & Development Center on Dec. 3.

Image: Courtesy Microsoft Research

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Article: Working with Asian countries to improve information-sharing

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Article: Opposition renews call for outside audit of food safety system

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Article: AVA adopts new technology on food screening system

AVA adopts new technology on food screening system - Channel NewsAsia

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Food-Info.net> Welcome to the Food Info site

http://www.food-info.net/uk/index.htm


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Article: Chef Tom Colicchio calls antibiotics in the U.S. meat system one of our biggest food safety challenges

Chef Tom Colicchio calls antibiotics in the U.S. meat system one of our biggest food safety challenges - NRDC Worldview

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Article: Pork Investigation By 'Consumer Reports' Finds Rampant Antibiotic-Resistant Bacteria

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881903.com 商業電台 -

http://www.881903.com/Page/ZH-TW/newsdetail.aspx?ItemId=577313&csid=261_341


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香港政府新聞網 - 類別 - 社區與健康 - 八人尖沙咀晚膳後中毒

http://www.news.gov.hk/tc/categories/health/html/2012/11/20121127_172700.shtml


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Article: Total Recall: Food Safety Precautions Increase Recalls

Total Recall: Food Safety Precautions Increase Recalls - Supermarket News

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Article: Sunland food product recall has gone international

Sunland food product recall has gone international - Examiner

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大中华食品安全信息库

http://kwanlab.bio.cuhk.edu.hk/FS   大中华食品安全信息库

Article: Hong Kong: Suspected food poisoning case under CHP investigation

Hong Kong: Suspected food poisoning case under CHP investigation - Presstrust.com

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Overcome Communication Barriers to Food Safety :: Article - Food Quality

http://www.foodquality.com/details/article/2497991/Overcome_Communication_Barriers_to_Food_Safety.html?tzcheck=1


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Article: How Dangerous Is Genetically Modified Food?

How Dangerous Is Genetically Modified Food? - The Market Oracle

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Peanut Allergies Higher Among Wealthier Kids - Discovery News

http://news.discovery.com/human/peanut-allergies-121112.html

Peanut Allergies Higher Among Wealthier Kids

13 November, 2012 1:08:00 AM

Children from wealthy families may more likely to have peanut allergies than those less well-off, a new study finds.

In the study, children ages 1 to 9 from high-income families had higher rates of peanut allergies compared with children these ages from lower income families.

NEWS: Do You Have Food Allergies? Are You Sure?

The researchers analyzed information from 8,306 children and adultswhose blood samples were taken as part of a national health survey in 2005 to 2006. About 9 percent of participants had an elevated levels of antibodies to peanuts, indicating they had the potential to be allergic to peanuts.

The results add support to the hygiene hypothesis, said study researcher Dr. Sandy Yip, of the U.S. Air Force. The hygiene hypothesis is the idea that living in a cleaner environment may make people's immune systems more sensitive, and increase the prevalence of allergies.

The findings are also inline with those of a study published earlier this year, which found children living in cities were more likely to have food allergies compared with those living in rural areas, which tend to be less expensive than cities.

NEWS: Got Allergies? Take a Worm

The study was presented this week at the American College of Allergy, Asthma and Immunology meeting in Anaheim, Calif.

Pass it on: Peanut allergies are more common in children from higher income families.

More From MyHealthNewsDaily.com

• 9 Weirdest Allergies
• 8 Strange Signs You're Having an Allergic Reaction
• Worst US Cities for Allergies Revealed

Copyright 2012 MyHealthNewsDaily, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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Article: Grape seed extract may help with norovirus infections

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Article: Food, health, quarantine meeting opens

Food, health, quarantine meeting opens - News.gov.hk

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Article: Local government collaboration through technology and training

Local government collaboration through technology and training - PR Newswire

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Article: Food Safety Testing Market and Food Safety Products Industry Analyzed...

Food Safety Testing Market and Food Safety Products Industry Analyzed... - PRWeb

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Article: MEC and CIC reveal 2013 consumption trends in China

MEC and CIC reveal 2013 consumption trends in China - Webwire

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Edible Deodorant: The Perfume Candy - Discovery News

http://news.discovery.com/tech/edible-deodorant-perfume-candy-121109.html

Edible Deodorant: The Perfume Candy

10 November, 2012 1:18:08 AM

Nic Halverson)

We all know what to do when we encounter someone with bad breath. Politely give 'em a breath mint and perhaps extol the virtues of flossing, right? But what about a person with B.O. so funky it could peel wallpaper off the wall? Then what?

Simple. Give them a few pieces of Deo Perfume Candy, a new confection billed as edible deodorant.

Beneo, an American nutrition and health company partnered with Bulgarian candy maker, Alpi, to develop sweets that will leave you smelling like a bed of roses.

DNEWS VIDEO: SYNTHETIC LIFE, ENGINEERING TISSUE AND MORE …

BIG PIC: Crystals You Drink Every Morning

"The innovative technology behind Deo Perfume Candy is based on research by Japanese scientists," explains Deo's website. "Their studies showed that when ingested, rose oil exudes aromatic compounds, such as geraniol, through the skin. When evaporating through the skin, geraniol aromatizes it with a beautiful rose fragrance."

One serving size (four pieces) contains 12 mg of geraniol. While the strength and duration of the perfume depends on body weight, developers say one serving size eaten by a person weighing 145 pounds could last up to six hours.

While this all sounds like something whipped up in Willy Wonka's dream factory, the science is nothing new. Anyone who's ever chowed down on garlic, asparagus or cumin know how easily different foods can effect body odor and fluids.

NEWS: Humans Stink More Than Other Animals

And, as the Guardian points out, Deo Perfume Candy is not alone in world of edible deodorants. There's Swallowable Parfum, a Dutch company developing a similar concept and the now-defunct Japanese chewing gum, Otoko Kaoru, which translates as "man scent."

Bags of Deo are already sold in shops in Spain, Germany, China, Korea, Armenia and are expected to soon be available in the U.S. However, for those that can't wait, the $10 bags are available for sale online.

via the Guardian

Credit: Deo Perfume Candy

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---

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Article: MO BIO Laboratories, Inc. Launches the PowerMag Microbiome RNA/DNA Isolation Kit

MO BIO Laboratories, Inc. Launches the PowerMag Microbiome RNA/DNA Isolation Kit - PR Newswire

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Article: Issues of cleanliness, sanitization raised at processing plant at centre of beef recall

Issues of cleanliness, sanitization raised at processing plant at centre of beef recall - Canada.com

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Article: New data from USDA about international food safety audits

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Article: Hong Kong: SFH on Steering Committee on Review of the Regulation of Private Healthcare Facilities

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How to Create a Mind - Homepage

http://howtocreateamind.com/#.UJYcgy8icWY.gmail

Article: Researchers Discover How E. coli Adapts To Colonize Plants, Fruit And Vegetables

Researchers Discover How E. coli Adapts To Colonize Plants, Fruit And Vegetables - Medical News Today

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Article: Human microbiome project provides census of thousands of microbes that live in and on us

Human microbiome project provides census of thousands of microbes that live in and on us - The Boston Globe

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中华人民共和国食品安全法

http://www.china.com.cn/policy/txt/2009-03/06/content_17389265.htm#


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Article: Bolthouse Farms carrot chips recalled due to salmonella risk

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Article: How The Phrase 'Chinese-Style' Became Code For Everything That's Wrong With The Country

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Article: Local government collaboration through technology and training

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Article: Food Safety Testing Market and Food Safety Products Market - Global Industry Size, Market Share, Trends, Analysis and Forecast, 2010 - 2018: MarketResearchReports.Biz

Food Safety Testing Market and Food Safety Products Market - Global Industry Size, Market Share, Trends, Analysis and Forecast, 2010 - 2018: MarketResearchReports.Biz - PR Newswire

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Article: More Canadians are anxious about food safety

More Canadians are anxious about food safety - Canadian Business Magazine

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Article: Automatically Detect and Manage Food Packaging Supplier Risks

Automatically Detect and Manage Food Packaging Supplier Risks - GlobeNewswire

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Article: Charlee Bear Products Recalls "Protein Crunch Bars" Because Of Possible Salmonella Health Risk

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Article: Mangoes from Mexico are facing tighter inspections

Mangoes from Mexico are facing tighter inspections - ABC30

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Article: Food Safety: Tips if Hurricane Sandy Knocked Out Your Fridge

Food Safety: Tips if Hurricane Sandy Knocked Out Your Fridge - DailyFinance

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Article: Adaptable button mushroom serves up genes critical to managing the planet's carbon stores

Adaptable button mushroom serves up genes critical to managing the planet's carbon stores - PhysOrg

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Article: Carrefour Establishes Food Safety Testing Center In Shanghai

Carrefour Establishes Food Safety Testing Center In Shanghai - China Sourcing News

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“The Future of Food is Microbiology?!!” | Oscillator, Scientific American Blog Network

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Article: E. coli outbreak now at 130 cases

E. coli outbreak now at 130 cases - BBC Health

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Article: Investigation reveals food safety concerns; ISP working to crack down

Investigation reveals food safety concerns; ISP working to crack down - WHAS 11

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Article: Nongshim noodle recall urged over cancer-causing substance

Nongshim noodle recall urged over cancer-causing substance - South China Morning Post

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Article: The Problem with China

The Problem with China - QSR Online

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Article: As Foodborne Illnesses Skyrocket, GOP Slashes Funds For Food Safety

As Foodborne Illnesses Skyrocket, GOP Slashes Funds For Food Safety - ThinkProgress

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Article: Turtle program aims to cut salmonella risk

Turtle program aims to cut salmonella risk - MSNBC Health

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Article: Higa Foodservice expanded ground beef recall

Higa Foodservice expanded ground beef recall - San Antonio Bizjournal

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Article: Foodborne illnesses 'getting worse'

Foodborne illnesses 'getting worse' - CNN Health

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Article: Foodborne illness up 44% in two years

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Article: The Wonders of Bread

The Wonders of Bread - Epochtimes

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Article: FDA Links Monster Energy Drinks to 5 Deaths

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Article: Ten Great Whole-Food Snacks for Kids

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Article: Select Harvests almonds recalled, linked to salmonella outbreak

Select Harvests almonds recalled, linked to salmonella outbreak - Examiner

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Article: Say Hello to Bacteria on Your Smartphone!

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Article: Why Foodborne Diseases Are on the Rise in the US

Why Foodborne Diseases Are on the Rise in the US - CNBC

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Article: How to stop zoonoses spreading - don't keep chickens under the bed

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Article: Another Supermarket Chain Will Permanently Stop Selling Sprouts Due To 'Potential Food Safety Risk'

Another Supermarket Chain Will Permanently Stop Selling Sprouts Due To 'Potential Food Safety Risk' - Clusterstock

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Article: Europe Worries about Health Hazards of Cheap Food from China - SPIEGEL ONLINE

Europe Worries about Health Hazards of Cheap Food from China - SPIEGEL ONLINE - www.spiegel.de

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Article: Maggots in the Pasta: Europe Screens Tainted Chinese Food

Maggots in the Pasta: Europe Screens Tainted Chinese Food - NYTimes World

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Article: Europe Screens Tainted Chinese Food

Europe Screens Tainted Chinese Food - China Digital Times

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Article: Nanopore sequencing will be the winning approach to DNA Sequencing

Nanopore sequencing will be the winning approach to DNA Sequencing - Next Big Future

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To visitors from United States, Russia, Germany, India, South Korea, France, Ukraine, Malaysia,United Kingdom, and other countries

Dear Visitors,

Thanks for reading my blog which is only a blog for my class FNSC4180. Now we have passed a total visits of 21,000. For a blog with only lecture materials and news, I think it is not bad. Now I wish that you can give me some comments on the blog. 

Which kind of information you like most on the blog? News, course materials, or my messages?

Do you like the news I am posting on the Blog? 

Have you visit our "Greater China Food Safety Database" by linking from this blog? How about "Kwanlab" web?

What would you like to read more from this blog?

I appreciate any comments from you. Your opinions will help me to improve this blog and also my teaching of Food Microbiology.

Please use the comments function on this blog to give me your comments.

 Sincerely,

Your blog host

H.S. Kwan

Professor

Food and Nutritional Sciences Programme

School of Life Sciences

The Chinese University of Hong Kong

Article: Life on Mars? Scientists hope to find it by decoding Martian DNA

Life on Mars? Scientists hope to find it by decoding Martian DNA - PhysOrg

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Article: China's economy slows down - threatening western bottom lines

China's economy slows down - threatening western bottom lines - Guardian Tech

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Article: Why Is Counterfeit Ketchup Exploding in New Jersey?

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UC Davis School of Vet Med: 100k Genome Project: Our Approach

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Microbiologist describes food disease genome effort 100K

Check out this video on YouTube:

http://www.youtube.com/watch?v=t3tVkXeYNoA&feature=youtube_gdata_player


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Article: Waste output records first drop in four years, green groups say

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大中华食品安全信息库: 1 美國DOLE FRESH VEGETABLES公司自主回收疑遭李斯特菌（Listeria Monocytogenes）污染之Dole American Blend袋裝沙拉，問題產品未輸入我國

http://kwanlab.bio.cuhk.edu.hk:8080/food_safety/newsPage.jsp?id=1502809 大中华食品安全信息库

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NIH uses genome sequencing to help quell bacterial outbreak in Clinical Center, August 22, 2012 News Release - National Institutes of Health (NIH)

 

 -- NIH uses genome sequencing to help quell bacterial outbreak in Clinical Center, August 22, 2012 News Release - National Institutes of Health (NIH)

       http://www.nih.gov/news/health/aug2012/nhgri-22.htm
      

ATCC: "Big Six" Non-O157 Shiga Toxin-Producing Escherichia coli

http://www.atcc.org/CulturesandProducts/Microbiology/BacteriaandPhages/NonO157ShigaToxinProducingEscherichiacoli/tabid/2115/Default.aspx

Article: These Are The Huge Problems That Keep China Awake At Night

These Are The Huge Problems That Keep China Awake At Night - Business Insider

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Article: 19 Crazy Things That Only Happen In China

19 Crazy Things That Only Happen In China - Clusterstock

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Article: Seafood Raised on Animal Feces Approved for Consumers

Seafood Raised on Animal Feces Approved for Consumers - Slashdot

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Article: Hong Kong To Host International Food And Wine Festival

Hong Kong To Host International Food And Wine Festival - Gadling

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Article: Peanut plant closed; feds find more salmonella

Peanut plant closed; feds find more salmonella - MSNBC Health

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Article: First class seats, cattle class food

First class seats, cattle class food - Brisbane Times

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Greater China Food Safety Database 大中华食品安全信息库

We have launched the trial version of our "Greater China Food Safety Database 大中华食品安全信息库"-- a database of news, academic papers, and other information. 

You can now search food safety information from China and vicinities using our semantic analysis and statistical supports.

Try it out!! And give us your opinion.

http://kwanlab.bio.cuhk.edu.hk/FS/

 

Article: Winter at Home, Spring Abroad for China's Journalists

Winter at Home, Spring Abroad for China's Journalists - China Digital Times

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Strawberries from China likely source of gastro infection in Germany: Voice of Russia

http://english.ruvr.ru/2012_10_06/Strawberries-from-China-likely-source-of-gastro-infection-in-Germany/


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Article: China Health Labs & Diagnostics Ltd. announces $11.6 million sales order for its food safety products

China Health Labs & Diagnostics Ltd. announces $11.6 million sales order for its food safety products - Canada Newswire

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Article: Food Safety Bill S 510 is about ready to go

Food Safety Bill S 510 is about ready to go - FoodConsumer

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Article: Canada's food safety regime failed us

Canada's food safety regime failed us - The Toronto Star

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Knowledge - Inside Search - Google

Introducing the Knowledge Graph

http://www.google.com/insidesearch/features/search/knowledge.html

Food Safety Project, Iowa State University Extension

http://www.extension.iastate.edu/foodsafety/Lesson/contact.html

: : 美國肉類出口協會 : : 美國牛肉熟成之介紹

http://www.usmef.org.tw/trade/sell_data/s_product08.asp


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More questions

1. Are Acetobacter species & Saccharomyces cerevisiae salt-tolrant and can grow

on food at 7% salt w/v??

Both of these two are not known to be salt-tolerant.

2. Are both Acetobacter species & Saccharomyces cerevisiae mesophiles so they

cannot grow in food at 15 or 5 degree Celcius??

Acetobacter usually cannot grow below 15C.

Saccharomyces cerevisiae may be able to grow below 15C but 5C would be too low for much growth.

-----Original Message-----
From: wwwwwwwwwwwwwwwwwwwwww
Sent: Tuesday, May 08, 2012 3:53 PM
To: Prof. HS Kwan (School of Life Sciences)
Subject: RE: Questions on FNSC4180 Food Microbiology

Dear Prof. Kwan,

Oh, I see. Then, I am sorry that I would like to ask more questions...

1. Are Acetobacter species & Saccharomyces cerevisiae salt-tolrant and can grow

on food at 7% salt w/v??

2. Are both Acetobacter species & Saccharomyces cerevisiae mesophiles so they

cannot grow in food at 15 or 5 degree Celcius??

Question on calculation of number of D values

You asked the wrong question: the target of your problem is not to calculate D-value but the number of D's necessary to reach the acceptable cell density.  So the initial cell density is important.

From 1000 units to 0.001 units requires 6D.

Best,

HS Kwan

From: jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
Sent: Tuesday, May 08, 2012 1:13 PM
To: Prof. HS Kwan (School of Life Sciences)
Subject: Questions about final exam

Dear professor Kwan,

Good afternoon, today someone ask me how to calculate the D-value from the cell density, and I found that my friend's and my method is a little bit difference.

In determining D-value, if the initial cell density of that target microorganism (#) is 1000 unit, and the acceptable cell density of # is 0.001 unit, what should be the D-value calculated? 

My method is like that:D x log (1000/0.001) = 6D

My friend's method: D x log [1/(0.001)] = 3D

I found that the main problem is that do the initial cell density needed to be involved into the calculation ? 

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