The Hohenstein Institute offers Germany-wide exclusive accredited anti-dust-mite checks
On average a person spends 8 out of 24 hours asleep. Over a year, this is almost 3000 hours spent in bed, or rather, on a mattress. However, it's not just people who feel comfortable here. Mites ranging in size from 0.1 mm - 0.5 mm also feel at home.
Close-up of a mite:faeces particles reach mucus membranes via the respiratory tracts which can trigger typical symptoms:runny nose, itchy eyes and, in severe cases,even shortness of breath and asthma
® Hohenstein Institute
A mattress provides perfect conditions for mites. An average temperature of 25 degrees, humidity of up to 70 percent as well as human skin flakes on which the white arachnids feed. However, as well as in mattresses, mites are also found in bedding, upholstered furniture and carpets.
Between 4 and 5 million Germans suffer from an allergy to house dust mites, which is caused not by the mite itself, but by their faeces.
Stirred up faeces particles reach the individual's mucus membranes via the respiratory tracts and, if the individual is allergic, they trigger typical symptoms including a runny nose, streaming or itchy eyes and, in severe cases, even asthma and shortness of breath.
The Hohenstein scientists from the department for Hygiene, Environment & Medicine are testing the efficiency of textiles in reducing house dust mites and mite allergens or providing an effective barrier against them.
Tests are therefore being carried out at the Hohenstein Institute on the impermeability of bedding and encasings against mite faeces. Encasings are special mattress covers which are used to avoid contact with allergens. Scientific studies have shown that they offer relief from house dust mite allergies.
The challenge for the manufacturers is to design the casings in such a way that they form a physical barrier created from the fabric structure and the laminate network. This must also be sufficiently resistant to mite faeces when the sleeping person turns over during the night. The special feature of the encasing test carried out by the Hohenstein Institute is that real mite faeces from house dust mites are used.
Surfaces, seams, and zip fasteners are applied with real mite faeces and the strain during sleep is reconstructed through pressure and friction. The quantity of mite faeces allergens which manage to get through the material during the simulated use is measured ("Der p1"). The value for this test must not exceed two micrograms (corresponds to the sensitization threshold for persons allergic to house dust mites).
The test for resistance (barrier effect) against mite faeces allergens is a DAkkS-accredited service and will be carried out exclusively by the Hohenstein Institute across Germany using real mite faeces.
To help persons with allergies to make their decisions, tested materials are awarded the Hohenstein quality label "House Dust and Mite Barrier". This is particularly interesting for the health service and the hotel and hospitality industry as the quality label gives a reliable signal to customers and guests. In addition, complaints can be effectively minimised with the test and safety for consumers increased.
A further DAkkS-accredited test by the Hohenstein Institute is the examination of the long-term impact of textiles and chemicals that should restrict the development of house dust mites. This long-term test is carried out in accordance with standard NF G39-011. House dust mites are applied to the test samples and controls. After two population cycles, i.e. 6 weeks, under optimum conditions for the mites, the number of living mites is either counted directly using a stereo microscope or, in the case of three-dimensional test samples, the allergen content ("Der p1") is determined.
Products that are very effective at preventing the growth of the mite population receive the certificate "Anti Dust Mite". On demand it can also be awarded the quality label "Anti Dust Mite". The customer can thus easily see that he is purchasing a product suitable for persons allergic to house dust mites - a key purchasing decision.
Both quality labels presented here, "House Dust and Mite Barrier" and "Anti Dust Mite", can be easily combined with other quality labels from the Hohenstein Institute, for example, the "Sleep Comfort Vote" or "Hypoallergenic".
Contact person for anti-mite tests:
Hygiene, Environment and Medicine
Tel: +49 7143 271 444
Fax: +49 7143 271 94444
Andrea Höra | idw - Informationsdienst Wissenschaft
Multi-institutional collaboration uncovers how molecular machines assemble
02.12.2016 | Salk Institute
Fertilized egg cells trigger and monitor loss of sperm’s epigenetic memory
02.12.2016 | IMBA - Institut für Molekulare Biotechnologie der Österreichischen Akademie der Wissenschaften GmbH
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy