The Science of Food

This web log serves as a forum for news, views and discussion about all things related to the science of food: food chemistry, microbiology, engineering, process technology, and nutrition. Also discussed are issues related to food safety, GMO foods, organic foods, health and wellness, and news about what's going on in the PSU Food Science Department.

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Is 'pink slime' being unfairly demonised?

(Jim Cole/AP/Press)"Pink slime" may be off the menu for many US school children after the US Department of Agriculture (USDA), which provides a fifth of school meals in the US through its National School Lunch Program, yielded to a petition demanding the withdrawal of the meat product from the school menu.
However, the beef industry, the company that makes the product and campaigners against food contamination have fiercely defended the safety and value of the product, officially called "lean finely textured beef" (LFTB).
So what's going on? What is "pink slime", and is it being unfairly demonised? [MORE]

April 29, 2012 in Food Microbiology, Food Technology | Permalink

Ancient Nubians Made Antibiotic Beer

694px-Egyptian_kitchen_Berlin_2-1-660x569 Chemical analysis of the bones of ancient Sudanese Nubians who lived nearly 2000 years ago shows they were ingesting the antibiotic tetracycline on a regular basis, likely from a special brew of beer. The find is the strongest yet that antibiotics were previously discovered by humans before Alexander Fleming discovered penicillin in 1928.

“I’m going to ask Alexander Fleming to hand back his Nobel Prize,” joked chemist Mark Nelson, who works on developing new tetracyclines at Paratek Pharmaceuticals and is lead author of the paper published June in the American Journal of Physical Anthropology.

Read More http://www.wired.com/wiredscience/2010/09/antibiotic-beer/#ixzz0ykbbxjqW

 

September 06, 2010 in Food History, Food Microbiology | Permalink

Researchers Try to Explain E. coli in Produce

From Food Safety News | Jul 13, 2010

Lettuce-field4-featured A new field study by UC Davis scientists has measured the incidence of E. coli O157:H7 in the feces of Northern California wildlife. This study, funded by the U.S. Department of Agriculture (USDA) and the U.S. Food and Drug Administration (FDA) found E. coli O157:H7 in some wildlife stool samples. However, these samples may not be enough to explain the numerous E. coli O157:H7 outbreaks in leafy greens over the past decade.

This study was designed in response to the massive spinach E. coli O157:H7 outbreak of 2006 in which over 200 people were sickened across the country and three people died.[MORE]

August 06, 2010 in Food Microbiology, Food Safety and Security | Permalink

The science behind bread making

Breadk9566-1 The science behind bread making centers around a complicated chemical process that occurs when flour is mixed with yeast. Learn more about bread making on Discovery Channel's "HowStuffWorks" show [HowStuffWorks Show: Bread Making ].

More bread and starch science from the Penn State Food Science laboratory of Dr. Donald Thompson  here:
Branched Starch Molecules: Contribution to Ordered Structures in Granular Starch and Dispersed Starch Molecules [PDF Download]

July 09, 2010 in Food Chemistry, Food Microbiology | Permalink

Beware the Myth of Grass-Fed Beef

Cows Cows raised at pasture are not immune to deadly E. coli bacteria.

James E. McWilliams Slate.com

The comparative health benefits of grass-fed beef are well documented. Scores of studies indicate that it's higher in omega 3s and lower in saturated fat. But when it comes to E. coli O157:H7, the advantages of grass-fed beef are not so clear. In fact, exploring the connection between grass-fed beef and these dangerous bacteria offers a disturbing lesson in how culinary wisdom becomes foodie dogma and how foodie dogma can turn into a recipe for disaster [MORE].

January 22, 2010 in Food Microbiology, Food Trends | Permalink

Unpasteurized Milk: A Continued Public Health Threat

Milk Although milk and dairy products are important components of a healthy diet, if consumed unpasteurized, they also can present a health hazard due to possible contamination with pathogenic bacteria. These bacteria can originate even from clinically healthy animals from which milk is derived or from environmental contamination occurring during collection and storage of milk.

Pasteurization is the most effective method of enhancing the microbiological safety of milk. The consumption of milk that is not pasteurized increases the risk of contracting disease from a foodstuff that is otherwise very nutritious and healthy. Despite concerns to the contrary, pasteurization does not change the nutritional value of milk. Understanding the science behind this controversial and highly debated topic will provide public health care workers the information needed to discern fact from fiction and will provide a tool to enhance communication with clients in an effort to reduce the incidence of infections associated with the consumption of unpasteurized milk and dairy products.[MORE]

Foodborne disease outbreaks attributed to unpasteurized milk - 1993 -2006

(click image to magnify)

Upmilkoutbreaks

December 17, 2008 in Food Microbiology | Permalink

Bacteria In Mouth Help Make Certain Foods Tasty

ScienceDaily (Nov. 11, 2008) — Scientists in Switzerland are reporting that bacteria in the human mouth play a role in creating the distinctive flavors of certain foods. They found that these bacteria actually produce food odors from odorless components of food, allowing people to fully savor fruits and vegetables. Their study is scheduled for the November 12 edition of the ACS bi-weekly Journal of Agricultural and Food Chemistry. [MORE]

November 19, 2008 in Food Microbiology, Sensory Science | Permalink