Could too much linoleic acid be making us sick?
By Diane Nelson
There are good and bad fats, nutritionists say. But not all polyunsaturated fats, the so-called good fats, are created equal. A food chemist at UC Davis is exploring whether eating too much linoleic acid—a type of polyunsaturated fat found mainly in vegetable oils—can cause chronic inflammation, headaches, and other health problems.
Food such as salmon that are high in omega-3 fatty acids may be healthier than foods with some vegetable oils. (RafalStachura/Getty Images)
Full post: Not All “Good Fats” Are Created Equal
(771 words, 2 images, estimated 3:05 mins reading time)
Key to Tea’s Benefits May Be in the Soil
By Becky Oskin
Tea has long been linked to human health benefits like preventing cancer and heart disease. But with hundreds of chemical compounds hidden in tea leaves, it is unclear which substances have the strongest effects.
The slew of “healthy” chemicals in tea varies with the variety of plant, how and where it is grown, and how the leaves are processed. Even soil bacteria contribute to a plant’s chemical profile, including its color, taste and aroma.
Full post: Microbes Could Bring Tea to California
(411 words, 1 image, estimated 1:39 mins reading time)
The Research Center of the Specialty Coffee Association (SCA) is teaming up with the UC Davis Coffee Center to embark on a two-year project to re-evaluate the scientific assumptions, measurement tools, sensory information, and – most importantly – consumer research that forms the foundation of the coffee industry’s fundamental understanding of coffee brewing.
Students in the UC Davis “Design of Coffee” class learn engineering principles from roasting and brewing coffee.
This research is underwritten with funding from Breville, which produces high-end appliances, including coffee and tea equipment.
Full post: Industry Supports UC Davis Coffee Research
(423 words, 1 image, estimated 1:42 mins reading time)
By Lisa Howard
Soil Actually Has a Microbiome
Gut bacteria have been getting a lot of attention lately (yogurt, anyone?) but it turns out the soil in your own back yard is teeming with microbial life. According to Kate Scow, a professor of soil science and microbial ecology at UC Davis, a quarter teaspoon of soil can easily contain a billion bacterial cells. And she estimates there can be 10,000 to 50,000 different taxa of microbes in a single teaspoon. Soil is one of the most complex and diverse ecosystems on the planet, and it is one that is essential for human life through all the functions it provides: the breakdown of organic materials, food production, water purification, greenhouse gas reduction, and pollution cleanup, just to name a few.
By Pat Bailey
A UC Davis-led study of nursing mothers in The Gambia shows how environment changes breast milk content
In a newly published study, UC Davis researchers and their colleagues, paint the picture of an elegant web of cause-and-effect that connects climate, the breast milk of nursing moms, gut microbes and the health of breast fed infants.
The research is part of a long-running. cross-disciplinary project at UC Davis studying milk and its role in nutrition. For example, last year UC Davis scientists and colleagues at Washington University St. Louis worked with both children and animal models to show how milk compounds could alter gut microbe composition and affect health. UC Davis researchers also led a consortium to study the “milk genome,” the collection of all genes related to producing milk.
UC Davis entomologist Christian Nansen trained some high-tech analysis on coffee beans, showing that brands were not consistent in content. Photo: Kathy Garvey
By Kathy Keatley Garvey
If your particular brand of coffee doesn’t seem to taste the same from week to week or month to month, you may be right. And it’s not you, it’s the coffee beans.
Agricultural entomologist Christian Nansen of the UC Davis Department of Entomology and Nematology and four colleagues analyzed 15 brands of roasted coffee beans, purchased at an area supermarket on two dates about six months apart, and using hyperspectral imaging technology, found “they were all over the board.”
Today’s White House announcement of the National Microbiome Initiative will bring new funding and attention to better understand the billions of microbes that swarm around in and around us and probably play an important role in our health, food and environment. At UC Davis, many scientists are already exploring this hidden world. Here are a few of them.
Jonathan Eisen is one of the pioneers of studying microbe communities through genetic sequencing. His lab is involved in understanding the complete “Tree of Life,” and projects on microbial communities associated with buildings, as well as communities on different plants and animals, including people, dogs and cats. A prolific blogger, Eisen regularly calls out examples of excessive microbiome hype.
By Carole Gan
Antibiotics are essential for fighting bacterial infection, but they can also make the body more prone to infection and diarrhea. Exactly how do antibiotics foster growth of disease-causing microbes – and how can resident “good” microbes in the gut protect against pathogens, such as Salmonella?
Now research led by Andreas Bäumler, professor of medical immunology and microbiology at UC Davis Health System, has identified the chain of events that occur within the gut lumen of mice after antibiotic treatment that allow “bad” bugs to flourish.
By Pat Bailey
The curtain cloaking how AIDS and HIV (human immunodeficiency virus) impact the human digestive and immune systems has been drawn back a bit further, thanks to a team of researchers from UC Davis’ departments of Food Science and Technology and Medical Microbiology and Immunology.
The small intestine is extremely difficult to study because of its location in the body but plays a critical role in human health. Its inner lining offers both a portal for absorbing nutrients and a barrier against toxins or invasive microbes.
Holstein cows eat lunch at the Dairy Cattle Facility at UC Davis. Credit: Gregory Urquiaga, UC Davis
By Frank Mitloehner
As the November 2015 Global Climate Change Conference COP21 concluded in Paris, 196 countries reached agreement on the reduction of fossil fuel use and emissions in the production and consumption of energy, even to the extent of potentially phasing out fossil fuels out entirely.