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Photon nose for monitoring crops

08.08.2022

Experts from two British universities are embarking on a new project to develop a photonic 'nose' to monitor crops for pests and plant diseases.

Aston University Birmingham is collaborating with Harper Adams University to research and develop technology to use light to monitor plant health. They will test the new technology on strawberries. After all, its berries are vulnerable to potato aphids, which can destroy the annual crop.

In general, with increasing pressure to find alternatives to pesticides due to environmental and human health concerns, one method is to use Integrated Pest Management (IPM) to establish an early warning system. The point is to constantly make sure that insects and diseases do not accumulate on the plants, instead of spraying the plants with chemicals. However, there are doubts about the cost and reliability of this method.

The new project uses the latest developments in photonic technology that can analyze the low levels of volatile organic compounds (VOCs) emitted by plants that are indicative of their health status. Thus, by connecting machine learning hardware, artificial intelligence can be put into practice in a commercial setting.

Monitoring technologies for invertebrate pests and plant diseases can significantly reduce crop losses.

However, most electronic noses use electrochemical sensors, which have issues with sensitivity, sensor drift, or aging effects, and lack specificity. We intend to solve this problem by building on the fast-moving technology of photonics - the science of light - and collaborating with scientists from other disciplines," said Professor David Webb of the Aston Institute of Photonic Technology (AIPT).

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Despite technological progress in the smartphone industry, users of many models complain about insufficient battery life. The task of creating a high-capacity battery with compact dimensions is urgent, and the best minds in research laboratories are trying to create the battery of the future.

Scientists from the Argonne National Laboratory (USA), the University of Utah (USA), the University of Louisville (USA), the University of Illinois at Chicago (USA), Hanyang University (South Korea) have created a prototype of the so-called "lithium-oxygen" battery. This novelty uses lithium oxide (LiO2) and has five times the capacity of modern lithium-ion batteries (according to the source). Interestingly, attempts have already been made to create a battery of this type, but they have remained at the project stage, since lithium oxide is difficult to synthesize in pure form. The researchers were able to establish that crystalline LiO2 can be stabilized through the use of graphene cathodes.

The results of the study showed that the LiO2 in the battery can remain stable even when the battery is continuously charged and discharged at a relatively low voltage of 3,2 V. According to the inventors, their discovery is an important step towards creating a new type of high-capacity battery.

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