2,410,395 research outputs found

    Prospecting for organic fungicides and resistance inducers to control scab (Venturia inaequalis) in organic apple production

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    As a part of the REPCO project we are prospecting for plant extracts and other materials to control apple scab in order to find substitutes for copper fungicides in organic apple production. Two routine screening systems are used to evaluate the potential of materials to control apple scab; one testing the effect of materials on conidium germination on glass slides, and one testing the effect of materials on scab development on apple seedlings grown in growth chambers. Several interesting materials have been identified and a number have been selected for testing in experimental organic apple orchards. Studies of the mode of action of promising materials including induced resistance are on-going and work on improvement of timing and formulation is initiated at KVL

    Garbage Beam

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    Located in a hot desert climate area prone to strong winds, Egypt is made up of many homes with little to no roofing leaving civilians exposed to the harsh elements. The overarching goal of this project is to provide these homes with efficient and affordable roofing using concrete with common garbage materials as reinforcement. Through preliminary testing and tensile testing it was possible to narrow the focus down to two reinforcement materials: fish netting and plastic grocery bags. From there final beam testing and pull out testing successfully demonstrated the promise of these materials. With this, however, it is still important to continue research on the materials and improve on the design in order to eventually create a one-way slab roof and pass that design over to an NGO that can successfully implement it

    Testing device subjects elastic materials to biaxial deformations

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    Testing device stretches elastic materials biaxially over large deformation ranges and varies strain ratios in two perpendicular directions. The device is used in conjunction with a tensile testing machine, which holds the specimen and permits control over the direction and magnitude of the stresses applied

    Bioactive composites for bone tissue engineering

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    One of the major challenges of bone tissue engineering is the production of a suitable scaffold material. In this review the current composite materials options available are considered covering both the methods of both production and assessing the scaffolds. A range of production routes have been investigated ranging from the use of porogens to produce the porosity through to controlled deposition methods. The testing regimes have included mechanical testing of the materials produced through to in vivo testing of the scaffolds. While the ideal scaffold material has not yet been produced, progress is being made

    Testing of hydrogen sensor based on organic materials

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    Práce je zaměřena na problematiku bezpečnostních vodíkových senzorů. Základní principy a teorie vodíkových senzorů je rozebrána v první části práce. Je navržena metodologie testování organických vodíkových senzorů vyvinutých a vyrobených na Fakultě Chemické Vysokého Učení Technického v Brně. Nejslibnější organický material byl testován. V závěrečné části byl navržen teplotní regulátor pro použití s keramickou senzorovou platformou.This thesis is focused on topic of safety hydrogen sensors. Theory of hydrogen sensors and main sensor principles are discussed. Methodology for testing of organic hydrogen sensors developed and fabricated at the Faculty of Chemistry of Brno University of Technology is outlined. A set of tests is done for the most promising organic material. Also, temperature regulator for ceramic sensor platform is designed.

    Apparatus for testing polymeric materials Patent

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    Apparatus for determining volatile condensable material present in polymeric product
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