PRESS-NEWS.org - Press Release Distribution
FREE PRESS RELEASES DISTRIBUTION

New dipping solution turns the whole fish into valuable food

2021-06-10
(Press-News.org) When herring are filleted, more than half their weight becomes a low-value 'side stream' that never reaches our plates - despite being rich in protein and healthy omega-3 fatty acids. Now, scientists from Chalmers University of Technology, Sweden, have developed a special dipping solution, with ingredients including rosemary extract and citric acid, which can significantly extend the side streams' shelf life, and increase the opportunities to use them as food.

Techniques for upgrading these side-streams to food products such as minces, protein isolates, hydrolysates and oils are already available today, and offer the chance to reduce the current practices of using them for animal feed, or, in the worst cases, simply throwing them away.

However, the big challenge is that the unsaturated fatty acids found in fish are very sensitive to oxidative degradation, meaning that the quality starts to decrease after just a few hours. This results in an unpleasant taste, odour, colour and texture in the final product. The reason why side stream parts from the fish such as backbones and heads are so sensitive is because they are rich in blood, which in turn contains the protein haemoglobin, which accelerates the fatty acid degradation process.

"Our new technology offers a valuable window of time for the producer, where the side-streams remain fresh for longer, and can be stored or transported before being upgraded into various food ingredients," says Ingrid Undeland, Professor of Food Science at the Department of Biology and Biological Engineering at Chalmers University of Technology.

The new technology is based on a dipping solution containing ingredients including for example rosemary extract and citric acid. Within the frame of a European project called WaSeaBi, and together with colleagues Haizhou Wu and Mursalin Sajib, Ingrid Undeland recently published a scientific study exploring the possibilities of the method.

Recycling the solution up to ten times The results showed that dipping the side stream parts from the herring filleting process into the solution, prior to storage, significantly extended the time before rancidity developed. At 20 °C, the storage time could be extended from less than half a day to more than three and a half days, and at 0 degrees, from less than one day to more than eleven days.

"And because the dipping solution covers the surface of side stream parts with a thin layer of antioxidants, these are carried over to the next stage of the process, providing more high-quality minces, protein or oil ingredients," explains Ingrid Undeland.

To make the technology cost-effective, the possibility of re-using the solution was also investigated. Results showed that even after reusing the solution up to ten times, rancidity was completely inhibited at 0 °C. In addition, it was found that the solution kept the fish haemoglobin in a form that was more stable and less reactive with the fatty acids, which the researchers believe explains the decrease in oxidation.

More on the study, and the possibilities of side-streams The study, Controlling hemoglobin-mediated lipid oxidation in herring (Clupea harengus) co-products via incubation or dipping in a recyclable antioxidant solution, was published with open access in the journal Food Control. It was based on herring side-streams from Sweden Pelagic, however, results obtained with dipping of cod-side streams from Royal Greenland also confirm that rosemary-based antioxidant mixtures are good at protecting against oxidation. This means that the solution can be used to prevent rancidity of different kinds of fish side-streams. The study was made available online in February, ahead of final publication in the July issue 2021.

Examples of valuable side streams from fish include, for example, the backbones and heads, which are rich in muscle and therefore suitable for fish mince or protein ingredients. As the belly flap and intestines are rich in omega-3 fatty acids, they can be used for oil production. The tail fin has a lot of skin, bones and connective tissue and is therefore well suited for, for example, the production of marine collagen, which is a much sought-after ingredient on the market right now. In addition to food, marine collagen is also used in cosmetics and 'nutraceuticals' with documented good effects on the health of our joints and skin.

INFORMATION:

About the project: WaSeaBi is a four-year project that aims to optimise the utilisation of seafood side-streams by developing new methods to produce nutritious and tasty ingredients. The project brings together an interdisciplinary team of 13 partners from five European nations which include Technical University of Denmark, Food & Bio Cluster Denmark, Chalmers University of Technology, AZTI, EIT Food, Sweden Pelagic, Royal Greenland, Alfa Laval, Pescados Marcelino, Jeka Fish, Barna, Nutrition Sciences, Ghent University.

The project receives funding from the Bio Based Industries Joint Undertaking (JU) under the European Union's Horizon 2020 research and innovation programme under grant agreement No 837726. The JU receives support from the European Union's Horizon 2020 research and innovation programme and the Bio Based Industries Consortium.



ELSE PRESS RELEASES FROM THIS DATE:

Molecular changes in white blood cells can help diagnose 'the bends' earlier in divers

2021-06-10
For over a century, researchers have known about "the bends", a serious condition affecting scuba divers. However, we still know relatively little about its physiological basis. Doctors do not yet have a definitive test for the bends, instead relying on symptoms to diagnose it. A new study in Frontiers in Physiology is the first to investigate genetic changes in divers with this condition, finding that genes involved in inflammation and white blood cell activity are upregulated. The findings cast light on the processes underlying the bends, and may lead to biomarkers that will help doctors to diagnose the condition more precisely. The bends, more formally known as decompression sickness, is a potentially lethal condition that can affect divers. Symptoms ...

Patient-provider discussions about bariatric surgery play pivotal role in weight loss outcomes

2021-06-10
BOSTON -- Obesity increases one's risk for many diseases and often prevents patients from receiving other necessary medical procedures. One of the most effective ways for patients with severe obesity to lose weight is through bariatric surgery, but it's not clear how often this option is raised. In a new study published in Obesity, investigators from Brigham and Women's Hospital find that eligible patients who discuss bariatric surgery options with their primary care providers or specialists from disciplines ranging from cardiology to urology are more likely to undergo surgery and lose more weight than ...

Flickering screens may help children with reading and writing difficulties

Flickering screens may help children with reading and writing difficulties
2021-06-10
Previous studies have shown that children with attention difficulties and/or ADHD solve cognitive tasks better when they are exposed to auditory white noise. However, this is the first time that such a link has been demonstrated between visual white noise and cognitive abilities such as memory, reading and non-word decoding in children with reading and writing difficulties. "The white noise to which we exposed the children, also called visual pixel noise, can be compared with giving children glasses. The effect on reading and memory was immediate," explains Göran Söderlund, Senior Lecturer in Education at the University of Gothenburg and Professor of Special Education at the Western Norway University ...

New research shows link between politics, boredom and breaking public-health rules

2021-06-10
People who are more prone to boredom and who are socially conservative are more likely to break public-health rules, according to new psychology research. While previous research demonstrated a connection between being highly prone to boredom and breaking social-distancing rules, this study demonstrated the association was more prominent as participants' social conservatism increased. "Many public-health measures such as wearing a mask or getting a vaccine have become highly politicized," said James Danckert, professor of psychology at the University of Waterloo. "People who find these ...

Higher alcohol content beer popularity growing, as overall beer consumption down

Higher alcohol content beer popularity growing, as overall beer consumption down
2021-06-10
PITTSBURGH, June 10, 2021 - Americans are consuming more craft beer with higher alcohol content but are drinking less beer by volume, according to a new analysis led by epidemiologists at the University of Pittsburgh Graduate School of Public Health. The study, published online and in a coming issue of the journal Substance Use & Misuse, looked at beer purchased in stores between 2004 and 2014. This is the first study to examine trends not only in the volume of beer purchased, but also the "beer specific" alcohol content. "With the rise in popularity of craft breweries and the acquisition of such breweries by large-scale ...

India's national government has inappropriately prioritised people for covid-19 vaccination

2021-06-10
India's national government has inappropriately prioritised people for covid-19 vaccination Current approach is causing huge numbers of avertable deaths, warn experts India's national government has inappropriately prioritised people for covid-19 vaccination, argue doctors and researchers in The BMJ today. Peter Lloyd-Sherlock and colleagues warn that the government's current approach to vaccination - focusing on younger age groups - "is causing huge numbers of avertable deaths and is deeply inequitable." From 3 May to 5 June 2021, more first doses were administered to people under 45 than over 60, even though at ...

Targeted therapy pralsetinib safely effectively treats lung and thyroid cancers with RET alterations

2021-06-10
HOUSTON -- Results from the multi-cohort Phase I/II ARROW clinical trial, conducted by The University of Texas MD Anderson Cancer Center researchers, showed that a once-daily dose of pralsetinib, a highly selective RET inhibitor, was safe and effective in treating patients with advanced RET fusion-positive non-small cell lung cancer (NSCLC) and RET-altered thyroid cancer. The findings for each cohort were published today in The Lancet Oncology and The Lancet Diabetes & Endocrinology, respectively. "Targeted therapies have dramatically improved care for patients with NSCLC and thyroid cancer driven by oncogenes, and the rapid clinical translation of selective RET inhibitor ...

Liquid water on exomoons of free-floating planets

2021-06-10
The moons of planets that have no parent star can possess an atmosphere and retain liquid water. Astrophysicists at LMU have calculated that such systems could harbor sufficient water to make life possible - and sustain it. Water - in liquid form - is the elixir of life. It made life possible on Earth and is indispensable for the continuing existence of living systems on the planet. This explains why scientists are constantly on the lookout for evidence of water on other solid bodies in the Universe. Up to now, however, the existence of liquid water on planets other than Earth has not been directly proven. However, ...

Research shows decline in collisions and convictions connected to increase in ridesharing

Research shows decline in collisions and convictions connected to increase in ridesharing
2021-06-10
The increased use of ridesharing apps was linked to a decrease in motor vehicle collisions and impaired driving convictions in Houston, according to published research by The University of Texas Health Science Center at Houston (UTHealth). The findings were published today in JAMA Surgery. Christopher Conner, MD, PhD, neurosurgery resident in the Vivian L. Smith Department of Neurosurgery at McGovern Medical School at UTHealth and the study's lead author, said the research is timely as more individuals are utilizing ridesharing apps. "Automobile accidents are the leading cause of death and disability among young people, so anything we can do to reduce those incidents ...

Protein in prostate cancer may inhibit tumor growth

Protein in prostate cancer may inhibit tumor growth
2021-06-10
Prostate cancer is the second most common cancer among men, according to the American Cancer Society. It's also one of the trickiest cancers to diagnose and treat. But new research from the University of Georgia has identified a protein that appears to prevent the cancer from spreading to and colonizing the bone, providing a new target for future therapeutics. "Unfortunately, prostate cancer that has spread to the bone is very aggressive, often lethal and very difficult to treat," said Brian Cummings, corresponding author of the study and head of the College of Pharmacy's pharmaceutical and biomedical sciences department. "Even in cases of successful treatment, the patient's quality of life is severely lessened due to bone loss." Prostate cancer that hasn't spread beyond nearby ...

LAST 30 PRESS RELEASES:

Blackologists and the Promise of Inclusive Sustainability

Robot-assisted surgery: Putting the reality in virtual reality

Novel interactions between proteins that help in recovering from brain injury

Common antibiotic found useful in accelerating recovery in tuberculosis patients

The 'Mozart effect' shown to reduce epileptic brain activity, new research reveals

Study examines heart and kidney outcomes of adults with nephrotic syndrome

Study examines symptoms before and after kidney transplantation

New research adds a wrinkle to our understanding of the origins of matter in the Milky Way

Stronger together: how protein filaments interact

New study uncovers details behind the body's response to stress

Carcinogen-exposed cells provide clues in fighting treatment-resistant cancers

Memory helps us evaluate situations on the fly, not just recall the past

Animals' ability to adapt their habitats key to survival amid climate change

Undiagnosed and untreated disease identified in rural South Africa

Study reveals new therapeutic target for C. difficile infection

New artificial heart shows promising results in 'auto-mode' -- initial clinical experience reported in ASAIO Journal

Picky neurons

Does cannabis affect brain development in young people with ADHD? Too soon to tell, reports Harvard Review of Psychiatry

Researchers find optimal way to pay off student loans

Use rewards effectively to boost creativity

Researchers find losartan is not effective in reducing hospitalization from mild COVID-19

Scientists detect signatures of life remotely

Team describes science-based hiccups intervention

Princeton-led team discovers unexpected quantum behavior in kagome lattice

Overcoming a newly recognized form of resistance to modern prostate cancer drugs

Will reduction in tau protein protect against Parkinson's and Lewy body dementias?

The end of Darwin's nightmare at Lake Victoria?

Study: Men doing more family caregiving could lower their risk of suicide

Researchers dig deeper into how cells transport their waste for recycling

Organic farming could feed Europe by 2050

[Press-News.org] New dipping solution turns the whole fish into valuable food