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
Copper hydroxide nanoparticles provide protection against toxic oxygen radicals in cigarette smoke
29.05.2017 | Johannes Gutenberg-Universität Mainz
Water forms 'spine of hydration' around DNA, group finds
26.05.2017 | Cornell University
The world's highest gain high power laser amplifier - by many orders of magnitude - has been developed in research led at the University of Strathclyde.
The researchers demonstrated the feasibility of using plasma to amplify short laser pulses of picojoule-level energy up to 100 millijoules, which is a 'gain'...
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
29.05.2017 | Physics and Astronomy
29.05.2017 | Physics and Astronomy
29.05.2017 | Earth Sciences