There, the concentrations of toxic substances from cigarettes are far higher than in smoky air, and they can be released again, for example by contact with the skin. In fact, only about 30% of the smoke is inhaled. The remaining 70% go out into the atmosphere and form a reservoir of "third-hand smoke".
Healthy skin cell (left) Skin cell affected by \"third-hand smoke\" (right). The damage (vacuole formation) is clearly visible.
Beware of \"third-hand smoke\"!
This is why scientists at the Institute for Hygiene and Biotechnology (IHB) at the Hohenstein Institute studied the question of whether and to what extent "third-hand smoke", in the form of the toxic substances on clothing, could damage the health of infants.
Unlike with passive smoking, where the risks of inhaled nicotine, which is toxic to the nervous system, are well-known, the first question in connection with "third-hand smoke" was to examine whether there are other health risks if the transmission channel is the skin. So researchers at the Hohenstein Institute wanted to find out exactly what happens when parents have a smoke outside on the balcony and then, after their break, take their baby in their arms again. To find the answer, the scientists at the IHB used a specially developed cell culture model of baby skin - a 3D skin model, the cell composition, structure and properties of which imitate the skin of babies and toddlers. To simulate the effects of third-hand smoke, a T-shirt was deliberately impregnated with nicotine, the main toxic ingredient of cigarettes, just like during a smoker's break on the balcony.
So that the quantity of the toxin could be verified afterwards, radioactively marked nicotine was used. Then the smoke-impregnated textiles were placed on the baby skin and the penetration of the nicotine into the skin was tracked in tracer studies. The results produced by the Hohenstein scientists showed for the first time that the neurotoxin nicotine is not only released from clothing by perspiration so that it can be detected in all the layers of baby skin, but it is also transported through the skin into deeper tissue layers. For comparison, the scientists repeated the experiments using donor skin from adults, and found that the results were the same.
So do the nicotine and other toxins from the smoke that have penetrated the skin have any verifiable harmful effects on the body, long after the last cigarette has been put out? To answer this question, the researchers at the IHB again exposed textiles to a specific amount of cigarette smoke. Then they investigated whether toxins could be released from the textile by perspiration and how cultures of skin and nerve cells react to the mixture of smoke and sweat. Here again the results were unambiguous: in the laboratory experiment, the toxins from the cigarette smoke that were dissolved in the perspiration caused massive damage to the skin cells; for example, they changed their shape and even, where the concentration was high, died off. Similarly, nerve cells, which are particularly active during the early stages of development, showed clear changes and were no longer able to connect properly with one another. The Hohenstein scientists are now publishing the results of their work in a scientific journal.
"Parents should be aware", says Prof. Dirk Höfer, Director of the Institute for Hygiene and Biotechnology at the Hohenstein Institute, "that their own clothing can transmit toxins from cigarette smoke.” The Hohenstein scientists are now working hard to find a solution for this problem. Prof. Höfer says: "We are currently looking at textile coatings which could neutralise the toxins from the cigarette smoke and so reduce the danger of ‘third-hand smoke’. But we still need to do more research." However, by working with skilled partners in industry, it is possible that they may achieve this goal quite soon. Especially for developing baby-friendly clothing to be worn next to the skin, the "baby skin model" used by the Hohenstein scientists now offers a versatile measuring system.
Rose-Marie Riedl | Hohenstein Institute
Study tracks inner workings of the brain with new biosensor
16.08.2018 | Rheinische Friedrich-Wilhelms-Universität Bonn
Foods of the future
15.08.2018 | Georg-August-Universität Göttingen
There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.
The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
21.08.2018 | Ecology, The Environment and Conservation
21.08.2018 | Life Sciences
21.08.2018 | Power and Electrical Engineering