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Wine-making waste: a natural weapon to beat bacteria
August 18, 2004Grape pomace extract can be used as an effective anti-microbial agent to destroy pathogens and help preserve food, according to new research by Turkish scientists published in the Journal of Science of Food and Agriculture.
Grape pomace
Pomace consists of grape seeds, skin and stems, and is a rich source of polyphenols. Phenolic substances are known to reduce the risk of heart disease and cancer by inhibiting human low-density lipoproteins. Pomace is already used as an important by-product of winemaking in the production of foods such as vinegar and molasses.
Bacterial tests
Pomace from the most popular Turkish grape cultivars, Kalecik karasi and Emir, was collected and tested against 14 types of common bacteria, including Escherichia coli and Staphylococcus aureus species, by Osman Sagdic and his team at Erciyes University and Suleyman Demirel University, Turkey. The grape pomace extracts gave effective anti-bacterial results when tested on all bacteria species at a concentration of five per cent, although the effects varied according to concentration, method and cultivars used.
Natural preservatives
"The extracts can be used in food formulations to protect food against spoilage bacteria. People prefer natural preservatives in the place of synthetic counterparts in food", says researcher Dr Sagdic.
"The world is always ready for better and more natural food preservatives. What we need to do now is to find a suitable food to put it in. The appearance and taste of the final product must be acceptable to the consumers", says Dr Yiu-Wai Chu, Biotechnology Group, Society of Chemical Industry.
Society of Chemical Industry
Bacteria Current Events and Bacteria News RSSNYU scientists discover dangerous new method for bacterial toxin transfer
Scientists have discovered a new way for bacteria to transfer toxic genes to unrelated bacterial species, a finding that raises the unsettling possibility that bacterial swapping of toxins and other disease-aiding factors may be more common than previously imagined.
Evolution in action: Our antibodies take 'evolutionary leaps' to fight microbes
With cold and flu season in full swing, the fact that viruses and bacteria rapidly evolve is apparent with every sneeze, sniffle, and cough. A new report in the January 2009 issue of The FASEB Journal, explains for the first time how humans keep up with microbes by rearranging the genes that make antibodies to foreign invaders. This research fills a significant gap in our understanding of how the immune system helps us survive.
Understanding Extinct Microbes May Influence the State of Modern Human Health
The study of ancient microbes may not seem consequential, but such pioneering research at the University of Oklahoma has implications for the state of modern human health. Cecil Lewis, assistant professor in the Department of Anthropology, says results of this research raise questions about the microbes living on and within people.
Fewer deaths with preventive antibiotic use
Administering antibiotics as a preventive measure to patients in intensive care units (ICUs) increases their chances of survival. This has emerged from a study involving nearly sixthousand Dutch patients in thirteen hospitals.
Uncultured bacteria found in amniotic fluids of women who experience preterm births
Researchers from Case Western Reserve University and Yale University have made a significant advancement in understanding the cause behind why some pregnant women suffer from inflammations in the inner womb without any signs of an infection.
Viruses, start your engines!
Peering at structures only atoms across, researchers have identified the clockwork that drives a powerful virus nanomotor. Because of the motor's strength--to scale, twice that of an automobile--the new findings could inspire engineers designing sophisticated nanomachines.
Research team reports how, when life on Earth became so big
In 3.5 billion years, life on earth went from single microscopic cells to giant sequoias and blue whales. Scientists have now documented quantitatively that the increase in maximum size of organisms was not gradual, but happened in two distinct bursts "tied to the geological evolution of the planet," said Michal Kowalewski, professor of geosciences at Virginia Tech.
Small molecule triggers bacterial community
While bacterial cells tend to be rather solitary individuals, they are also known to form intricately structured communities called biofilms.
New research lights up chronic bacterial infection inside bone
A new report demonstrates how a sensitive imaging technique gives scientists the upper hand in seeking out bacteria in chronic infections.
Peering inside the skull of a mouse to solve meningitis mystery
NYU Langone Medical Center scientists and their collaborators at the Scripps Research Institute in La Jolla, Calif., have discovered an unexpected cause for the fatal seizures seen in mice with viral meningitis, an infection of the central nervous system, according to a study published in the journal Nature.
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