Researchers from Manchester Metropolitan University have discovered that standard ultraviolet (UV) light and detection techniques may not show up the minute quantities of food soil that are stuck to surfaces, making it difficult to decide on the best way to clean them.
Even stainless steel surfaces can have tiny quantities of soil of unknown composition stuck to them, leading to possible contamination of food with pathogenic bacteria. "Tiny amounts of soil are enough to provide nutrients and a reservoir for contaminating bacteria to survive the cleaning processes, leading to food spoilage later," says Dr Kathryn Whitehead from Manchester Metropolitan University, UK. "The soil should be identified to make sure effective cleaning regimes are used on food preparation surfaces."
The researchers compared different methods used for the detection of food residues to determine which one was the best for different industries, including chemical and physicochemical methods, microscopy and rapid industrial methods such as UV light. They found that using more complex analytical methods is the most effective way to identify the food soil and develop a suitable cleaning regime.
"Some methods are not as sensitive as others at detecting food residue and micro-organisms in the food industries. A rapid industrial technique using UV light may be optimised to detect soil," says Dr Whitehead. "Our results also showed that different techniques may be better suited to different disciplines."
The researchers suggest that knowing the type of soil build-up on food surfaces, can lead to recommendations for the best strengths and types of cleaning products to help shift the residues. In some cases this may mean using lower strength cleaners, rather than higher concentration products. This should lead to a greater level of hygiene in the food industry.
"By using more precise methods to detect food residue and micro-organisms on surfaces, it may be possible that different cleaners could be used to target key fouling components," says Dr Whitehead. "We hope our work will lead to a greater level of hygiene in the food industry."
Lucy Goodchild | alfa
Scientists uncover the role of a protein in production & survival of myelin-forming cells
19.07.2018 | Advanced Science Research Center, GC/CUNY
NYSCF researchers develop novel bioengineering technique for personalized bone grafts
18.07.2018 | New York Stem Cell Foundation
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
19.07.2018 | Materials Sciences
19.07.2018 | Earth Sciences
19.07.2018 | Life Sciences