Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"Agrochemical"”.
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The Development of Chitosan Microspheres for Use as Agrochemical Delivery or Agropollutant Adsorption Systems
… thesis was the development of a hydrogel bead agrochemical delivery system for the nitrification inhibitor, dicyandiamide (DCD) and the development of a hydrogel bead adsorption system for the herbicide, paraquat. The hydrogel bead was based on the biopolymer chitosan which was protonated in …
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Ecosystem functioning, ecosystem services and rooibos production as affected by connectivity to natural vegetation and agrochemical use in rooibos tea (Aspalathus linearis) farming
… negative impacts of agricultural activities and agrochemical use on ecosystem services delivered by natural vegetation, but these impacts have not been assessed for the indigenous crop Aspalathus linearis (rooibos). The study was performed on 13 sites in Nieuwoudtville and Clanwilliam. I found …
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Planejamento e síntese de derivados triazólicos de biofenol como candidatos a novos fármacos e agroquímicos
… e do cálculo dos parâmetros de drug-likeness e agrochemical-likeness. Foram obtidos 15 derivados inéditos do Tirosol, devidamente caracterizados pelas técnicas de RMN de 1 H e 13 C. Os compostos da série foram posteriormente avaliados como inibidores da enzima acetilcolinesterase (Electrophorus …
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The Political-Economy of Science and (Bio)Technology: The Emergence of Agricultural Biotechnology in Canada
… centralization among multinational GM seed and agrochemical corporations, and the global production of GM crops. In the Canadian case, an attempt is made by the state to secure the agricultural biotechnology industry through the procurement of R&D, legislation, and regulation and by the state …
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ESIPT-Enabled Alkyne Migration Provides Rapid Access to Benzoxazinones
<p>Benozoxazinones have long been of interest to agrochemical scientists and medicinal chemists because of their widespread biological activity. These scaffolds are also of interest to synthetic chemists, who recognize the utility of benzoxazinones for accessing functionalized heterocycles. The use …
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The kernel of doubt : agricultural biotechnology, braided temporalities, and agrarian environments in India
… Hybrid Seed Company (Mahyco), and the U.S. based agrochemical company, Monsanto, which is now acquired by byer. The way it translated in practice was that, the Indian seed companies purchased seeds from MMB and through conventional breeding techniques, made crosses between plants containing the Bt …
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Metrics to segment the Brazilian agricultural financial market for operating loans
… have become relevant players, financing 17.17%. Agrochemical companies presented a market share of 13.7% while trading companies had a share of 10%; the smaller one is expected since they mostly work with grain and cotton. The last 13.9% if the total operating cost is financed by the farmer …
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Synthesis of Dicamba Glucosides for the Study of Environmental Dicamba Drift Effects on Soybeans
… herbicides such as dicamba and 2,4-D. Recently agrochemical companies have developed genetically modified crops that are resistant to herbicides such as dicamba. These modified crops allow farmers to spray their fields with dicamba without fear of crop damage. Farmers of non-genetically modified …
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EXPLORATIONS IN MEDIUM-RING ETHER SYNTHESIS VIA UMPOLUNG HETEROATOM ACTIVATION: TOTAL SYNTHESIS, METHODS DEVELOPMENT, AND REAGENT SYNTHESIS
… screened for bioactivity in collaboration with agrochemical industry.
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Optimising nutrient use efficiency in crop production
… analysis. Such a technique is useful in the agrochemical production of foliar fertilisers, where the efficiency of specific formulae can be rapidly compared. This can also further the current understanding of nutrient transport into plant tissues, as well as translocation. Agriculturally …
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Computational investigation of molecular recognition in plant hormone signal transduction
… can potentially be exploited for rational agrochemical design to target plant hormone receptors. For the rest of this thesis, I have focused on the investigation of protein-protein interactions involved in plant signaling. In order to improve computational efficiency of unbiased molecular …
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Modeling the tradeoff between inventory and capacity to optimize return on assets in production scheduling
In the agrochemical industry, companies are challenged with an extreme seasonality in demand driven by the crops' growing cycles. Therefore, balancing supply with such fluctuating demand has been a struggle for most companies due to their capacity constraints. One way to accommodate the demand is …
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CENÁRIO DA AGRICULTURA ORGÂNICA NO SEMIARIDO BRASILEIRO
… control, as well as the highest percentages of agrochemical use, both in agriculture and agroforestry systems. Sequentially, the semi-arid regions of Ceará and Pernambuco also have large contributions to organic indexes, mainly due to the higher number of establishments that receive technical …
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Axial chirale Phosphite als Liganden in der enantioselektiven Rhodium-katalysierten Hydrierung
In the pharmaceutical and agrochemical industry enantiomerically pure substances become more and more important as drugs or chiral building blocks. The Rhodium-catalyzed hydrogenation is a very effective way to produce such enantiomerically pure substances. Activity and selectivity of the …
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Photoredox Generated Radicals In Csp2-Csp3 Bond Construction
… has been an ongoing pursuit in the agrochemical, pharmaceutical, and materials science industries for over 40 years. Unfortunately, despite numerous attempts to circumvent the problems associated with alkyl nucleophiles, application of these reagents in transition metal-catalyzed C-C …
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Identification of catchment runoff processes as a basis for defining water quality protection zones
… Such protection zones are needed in relation to agrochemical pollution from farming. This study uses a combination of hydrological, hydrochemical and modelling approaches to identify the nature and likelihood of generation of different hydrological flow pathways and to recommend hydrology-based …
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The Effects of Agrochemicals on Litter Fungi
… forms in media, both with and without agrochemical addition. The results obtained with Phallus impudicus indicated that it was more comparable with the mycorrhizal species. The effects of PARAQUAT and VERDASAN on the leakage of potassium, phosphate and amino acide from mycorrhizal and …
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Synthesis of enantio-pure amides by reversal of the Geobacillus pallidus RAPc8 amidase hydrolysis reaction in non-aqueous media
… compounds, mostly used in the pharmaceutical, agrochemical and food industries. The discovery of amidases from extremophiles has increased the potential for application of these enzymes for the development of new processes. In nonaqueous media, amidases have the ability to synthesize …
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Quantifying the value of wildlife and wildlife-friendly farming for coffee agriculture
… wildlife-friendly farming methods (reduced agrochemical use and increased vegetative complexity), confirming not only the potential for coffee farms as refuges for biodiversity, but that these practices benefit coffee farmers also. Furthermore, we found that increased ecosystem functioning …
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Quantifying the value of wildlife and wildlife-friendly farming for coffee agriculture
… wildlife-friendly farming methods (reduced agrochemical use and increased vegetative complexity), highlighting not only the potential for coffee farms as refuges for biodiversity, but that these practices benefit coffee farmers also. Finally, we found that in areas of increased vegetative …
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