Phytoinsecticides to Fight Against Colorado Beetle

Nowadays researchers are focused on biological farming. In modern environmental conditions the reduction of the chemical load on the environment is a current issue. In the article the following plants are used as pest management, especially, with Colorado potato beetle: jimson weed, white hellebore, Camelina. They contain a lot of alkaloids and essential oils that inhibit weeds and frightening off potato pests. The use of such agricultural practices on large areas reduces the cost of chemical means of pest control and improves product quality while maintaining the environment

Presence of excited electronic state in CAWO4 crystals provoked by a tetrahedral distortion: an experimental and theoretical investigation

By combining experimental techniques such as x-ray diffraction, Fourier transform Raman, ultraviolet-visible, x-ray absorption near edge structure,extended x-ray absorption fine structure spectroscopy, and theoretical models, a general approach to understand the relationship among photoluminescence(PL) emissions and excited electronic states in CaWO4 crystals is presented. First-principles calculations of model systems point out that the presence of stable electronic excited states (singlet) allow us to propose one specific way in which PL behavior can be achieved. In light of this result, we reexamine prior experiments on PL emissions of CaWO4.MALTA-Consolider Ingenio Program (CSD2007-00045)Fundación Bancaja (P11B2009-08)Spanish-Brazilian Program (PHB2009-0065-PC)MICINN (CTQ2009-14541-C02)Generalitat Valenciana (PROMETEO/2009/053)CAPESCNPqFAPES