There are all sorts of amateur chemical rust removing techniques, and some electrochemical ones, many of which eat away lots of good metal as well as rust – all the dip-it-in-acid types, for example. Even ‘safe’ acids like vinegar and citric eat metal as well as rust. Commercial rust eaters have a mixture of chemicals (some well-guarded secrets) to dissolve ...
A team of Caltech engineers has developed an ink-jet-printable bio-sensor for skin using designer nano-particles. “Wearable biosensors that incorporate the nano-particles have been used to monitor metabolites in patients suffering from long covid, and the levels of chemotherapy drugs in cancer patients,” according to the university. “These sensors could be used to monitor a variety of biomarkers, such as vitamins, ...
University of Hertfordshire researchers have created an electronic nose that can identify smells in tens of milliseconds using standard metal oxide sensors in an novel way. The micro-machined sensors are ScioSense’s CCS801 volatile organic compound detector, and SGX Sensortech’s triple detector MiCs-6814 for carbon monoxide, nitrogen oxides and ammonia. These are duplicated for a total of eight metal oxide (‘MOX’) ...
An artificial nose with only a single sensor sounds like a dream, but researchers in Norway have got a significant way there, with one that can tell six volatile organic compounds apart 96% of the time, and can tell the difference between grapes bought yesterday and grapes bought last week. The team, from the Norwegian University of Science and Technology ...
Health-related chemicals can be detected on dry skin, according to the National University of Singapore (NUS), which developed a stretchable ‘ionic-electronic bilayer hydrogel’ sensor with the Singapore Agency for Science, Technology and Research (A*Star). The chemicals are known as solid-state epidermal biomarkers. “These biomarkers, which include cholesterol and lactate, are found in the stratum corneum, the outermost layer of the ...
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