Polyphenols help control free radical formation in humans and slow cell ageing. First and foremost, they are found in fruit and vegetables, but also in processed goods such as chocolate, tea or wine. Humans consume around a gramme of polyphenols a day, which is more than ten times the figure for vitamin C.
Strawberries, lychees and grapes are the fruits with the highest polyphenol content, but vegetables are not far behind, particularly artichokes, parsley and brussels sprouts. Moreover, total consumption also plays a role. As Pierre Brat* points out: "If we look at total polyphenol content in apples, they rank fifth compared to other fruits, but the extent of their consumption places them first!". Likewise, in terms of vegetables, potatoes rank just 19th, but their massive consumption means that they account for almost 60% of the polyphenols obtained from vegetables.
This prompted CIRAD and its partners to create a database, to set product composition against consumption. In all, the total polyphenol content of 162 vegetable and 71 fruit samples, along with 85 tea samples, was analysed. The results were used to compile a composition and consumption table, with values for 28 fruits and 24 vegetables (Journal of Nutrition, 2006, vol. 136, p. 2368-2373, co-author Pierre Brat).
The operation is continuing in the form of the Phénobase project, led by the CTCPA (Centre Technique de la Conservation des Produits Agricoles) in Avignon, in which CIRAD is also involved. The aim is to expand the database, this time looking at commonly consumed "processed" food products.
* Researcher with the CIRAD Qualisud Research Unit
Helen Burford | alfa
Forest Management Yields Higher Productivity through Biodiversity
14.10.2016 | Technische Universität München
Farming with forests
23.09.2016 | University of Illinois College of Agricultural, Consumer and Environmental Sciences (ACES)
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences