35 research outputs found

    Stereodifferentiation in the formation and decay of the encounter complex in bimolecular electron transfer with photoactivated acceptors

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    Experimental evidence has been obtained for the involvement of encounter complexes between both enantiomers of a π,π* triplet excited ketone and a chiral phenol or indole. Determination of the pre-equilibrium constants (KEC) and the intrinsic decay rate constants (kd) indicates a significant stereodifferentiation in both steps of the quenching process.Perez Prieto, Julia, [email protected] ; Galian, Raquel Eugenia, [email protected] ; Morant Miñana, Maria Carmen, [email protected]

    Triplet exciplexes as energy transfer photosensitisers

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    Experimental evidence is provided for the occurrence of triplet–triplet energy transfer from benzoylthiophene–indole exciplexes to naphthalenes with a remarkable stereodifferentiation; chiral recognition is also observed in the decay of the generated naphthalene triplets.Perez Prieto, Julia, [email protected] ; Galian, Raquel Eugenia, [email protected] ; Morant Miñana, Maria Carmen, [email protected]

    A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)

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    Bayesian Networks for the management of greenhouse gas emissions in the British agricultural sector

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    Recent years have witnessed a rapid rise in the development of deterministic and non-deterministic models to estimate human impacts on the environment. An important failing of these models is the difficulty that most people have understanding the results generated by them, the implications to their way of life and also that of future generations. Within the field, the measurement of greenhouse gas emissions (GHG) is one such result. The research described in this paper evaluates the potential of Bayesian Network (BN) models for the task of managing GHG emissions in the British agricultural sector. Case study farms typifying the British agricultural sector were inputted into both, the BN model and CALM, a Carbon accounting tool used by the Country Land and Business Association (CLA) in the UK for the same purpose. Preliminary results show that the BN model provides a better understanding of how the tasks carried out on a farm impact the environment through the generation of GHG emissions. This understanding is achieved by translating the emissions information into their cost in monetary terms using the Shadow Price of Carbon (SPC), something that is not possible using the CALM tool. In this manner, the farming sector should be more inclined to deploy measures for reducing its impact. At the same time, the output of the analysis can be used to generate a business plan that will not have a negative effect on a farm's capital income

    Analysis of ecosystem services provision in the Colombian Amazon using participatory research and mapping techniques

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    Over the last two decades indigenous peoples in the lower Caquetá River basin in Colombia have experienced detrimental changes in the provision of important ecosystem services in ways that have significant implications for the maintenance of their traditional livelihoods. To assess these changes we conducted eight participatory mapping activities and convened 22 focus group discussions. We focused the analysis on two types of change: (1) changes in the location of ecosystem services provisioning areas and (2) changes in the stock of ecosystem services. The focal ecosystem services include services such as provision of food, raw materials and medicinal resources. Results from the study show that in the past two decades the demand for food and raw materials has intensified and, as a result, locations of provisioning areas and the stocks of ecosystem services have changed. We found anecdotal evidence that these changes correlate well with socio-economic factors such as greater need for income generation, change in livelihood practices and consumption patterns. We discuss the use of participatory mapping techniques in the context of marginalized and data-poor regions. We also show how this kind of information can strengthen existing ecosystem-based management strategies used by indigenous peoples in the Colombian Amazon

    Assessing and mapping cultural ecosystem services at community level in the Colombian Amazon

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    Comprender la importancia que tienen los servicios ecosistémicos culturales (CES) para las comunidades tradicionales proporcionará información útil para el diseño de planes regionales o territoriales más apropiados para el área en la que se encuentran. Realizamos encuestas semiestructuradas en 11 comunidades indígenas dentro del corregimiento La Pedrera, de la Amazonía colombiana. Analizamos los CES establecidos en la región a través de un estudio de sus preferencias en relación a las Unidades Prestadoras de Servicio (SPU) identificadas, utilizando el método del índice de diversidad de Shannon como indicador de 'diversidad de uso'. Se identificaron más CES en comunidades con una población más grande; la educación y la recreación fueron las dos categorías de CES más prevalentes en el área de estudio. Nuestros hallazgos también destacan la importancia cultural de los cuerpos de agua, que estaban fuertemente vinculados con Spiritual y Sense of Place CES. Además, la integración de evaluaciones cualitativas y cuantitativas permite una mejor comprensión de la importancia que los CES tienen para las comunidades locales involucradas en el estudio y pueden ayudar en la gestión del territorio indígena.Understanding the significance that cultural ecosystem services (CES) have for traditional communities will provide useful input to the design of more appropriate regional or territorial plans for the area in which they are located. We conducted semi-structured surveys in 11 indigenous communities within the corregimiento La Pedrera, of the Colombian Amazon. We analysed the CES established in the region through a study of their preferences in relation to the service providing units (SPUs) identified, using the Shannon diversity index method as an indicator of 'diversity of use'. More CES were identified in communities with a larger population; education and recreation were the two most prevalent CES categories in the study area. Our findings also highlight the cultural importance of bodies of water, which were strongly linked with Spiritual and Sense of Place CES. Furthermore, the integration of qualitative and quantitative assessments enables a better understanding of the importance CES which have for the local communities involved in the study and may assist in the management of the indigenous territory.Q2Reflexión Económica, Administrativa y Contable (REAC

    Assessing and mapping cultural ecosystem services at community level in the Colombian Amazon

    No full text
    Comprender la importancia que tienen los servicios ecosistémicos culturales (CES) para las comunidades tradicionales proporcionará información útil para el diseño de planes regionales o territoriales más apropiados para el área en la que se encuentran. Realizamos encuestas semiestructuradas en 11 comunidades indígenas dentro del corregimiento La Pedrera, de la Amazonía colombiana. Analizamos los CES establecidos en la región a través de un estudio de sus preferencias en relación a las Unidades Prestadoras de Servicio (SPU) identificadas, utilizando el método del índice de diversidad de Shannon como indicador de 'diversidad de uso'. Se identificaron más CES en comunidades con una población más grande; la educación y la recreación fueron las dos categorías de CES más prevalentes en el área de estudio. Nuestros hallazgos también destacan la importancia cultural de los cuerpos de agua, que estaban fuertemente vinculados con Spiritual y Sense of Place CES. Además, la integración de evaluaciones cualitativas y cuantitativas permite una mejor comprensión de la importancia que los CES tienen para las comunidades locales involucradas en el estudio y pueden ayudar en la gestión del territorio indígena.Understanding the significance that cultural ecosystem services (CES) have for traditional communities will provide useful input to the design of more appropriate regional or territorial plans for the area in which they are located. We conducted semi-structured surveys in 11 indigenous communities within the corregimiento La Pedrera, of the Colombian Amazon. We analysed the CES established in the region through a study of their preferences in relation to the service providing units (SPUs) identified, using the Shannon diversity index method as an indicator of ‘diversity of use’. More CES were identified in communities with a larger population; education and recreation were the two most prevalent CES categories in the study area. Our findings also highlight the cultural importance of bodies of water, which were strongly linked with Spiritual and Sense of Place CES. Furthermore, the integration of qualitative and quantitative assessments enables a better understanding of the importance CES which have for the local communities involved in the study and may assist in the management of the indigenous territory.Q2Reflexión Económica, Administrativa y Contable (REAC
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