Chemical and carbon isotopic evolution of hydrocarbons during prograde metamorphism from 100°C to 550°C: Case study in the Liassic black shale formation of Central Swiss Alps

Hydrocarbon distributions and stable isotope ratios of carbonates (delta(13)C(car), delta(18)O(car)), kerogen (delta(13)C(ker)), extractable organic matter (delta(13)C(EOM)) and individual hydrocarbons of Liassic black shale samples from a prograde metamorphic sequence in the Swiss Alps were used to identify the major organic reactions with increasing metamorphic grade. The studied samples range from the diagenetic zone (< 100 degrees C) to amphibolite facies (similar to 550 degrees C). The samples within the diagenetic zones (< 100 and 150 degrees C) are characterized by the dominance of C-< 20 n-alkanes, suggesting an origin related with marine and/or bacterial inputs. The metamorphic samples (200 to 550 degrees C) have distributions significantly dominated by C-12 and C-13 n-alkanes, C-14, C-16 and C-18 n-alkylcyclopentanes and to a lesser extend C-15, C-17 and C-21 n-alkylcyclohexanes. The progressive C-13-enrichment (up to 3.9 parts per thousand) with metamorphism of the C-> 17 n-alkanes suggests the occurrence of cracking reactions of high molecular weight compounds. The isotopically heavier (up to 5.6 parts per thousand) C-< 17 n-alkanes in metamorphic samples are likely originated by thermal degradation of long-chain homologous with preferential release of isotopically light C-1 and C-2 radicals. The dominance of specific even C-number n-alkylcyclopentanes suggests an origin related to direct cyclization mechanism (without decarboxylation step) of algal or bacterial fatty acids occurring in reducing aqueous metamorphic fluid conditions. The regular increase of the concentrations of n-alkylcycloalkanes vs. C-> 13 n-alkanes with metamorphism suggests progressive thermal release of kerogen-linked fatty acid precursors and degradation of n-alkanes. Changes of the steroid and terpenoid distributions are clearly related to increasing metamorphic temperatures. The absence of 18 alpha(H)-22,29,30-trisnorneohopane (Ts), the occurrence of 17 beta(H)-trisnorhopane, 17 beta(H), 21 alpha(H)-hopanes in the C-29 to C-31 range and 5 alpha(H),14 alpha(H),17 alpha(H)-20R C-27, C-29 steranes in the low diagenetic samples (< 100 degrees C) are characteristic of immature bitumens. The higher thermal stress within the upper diagenetic zone (150 degrees C) is marked by the presence of Ts, the disappearance of 17 beta(H)-trisnorhopane and thermodynamic equilibrium of the 22S/(22S + 22R) homohopane ratios. The increase of the alpha alpha alpha-sterane 20S/(20S + 20R) and 20R beta beta/(beta beta + alpha alpha) ratios (from 0.0 to 0.55 and from 0.0 to 0.40, respectively) in the upper diagenetic zone indicates the occurrence of isomerization reactions already at < 150 degrees C. However, the isomerization at C-20 (R -> S) reaches thermodynamic equilibrium values already at the upper diagenesis (similar to 150 degrees C) whereas the epimerisation at C-14 and C-17 (alpha alpha ->beta beta) arrives to constant values in the lower anchizone (similar to 200 degrees C). The ratios Ts vs. 17 alpha(H)-22,29,30-trisnorneohopane [(Ts/(Ts + Tm)] and 18 alpha(H)-30-norneohopane (C29Ts) vs. 17 alpha(H),21 beta(H)-30-norhopane [C29Ts/(C29Ts + C-29)] increase until the medium anchizone (200 to 250 degrees C) from 0.0 to 0.96 and from 0.0 to 0.44, respectively. An opposite trend owards lower values is observed in the higher metamorphic samples. The occurrence of specific hydrocarbons (e.g., n-alkylcyclopentanes, cadalene, hydrogenated aromatic compounds) in metamorphic samples points to kerogen degradation reactions most probably occurring in the presence of water and under reducing conditions. The changes of hydrocarbon distributions and carbon isotopic compositions of n-alkanes related to metamorphism suggest that the organic geochemistry may help to evaluate the lowest grades of prograde metamorphism. Copyright (c) 2005 Elsevier Ltd.

Parámetros predictivos de dificultad en la práctica de la anestesia regional neuroaxial

Objectiu: avaluar quines característiques del pacient i de la tècnica influeixen en la predicció de dificultat en la realització d’un bloqueig neuroaxial. Material i mètodes: estudi observacional prospectiu de 539 pacients sotmesos a un bloqueig regional neuroaxial. Registrem dades demogràfiques, anatòmiques, relacionades amb la tècnica (palpació d’estructures de referència, grau de flexió, morfologia de la curvatura lumbar), experiència anestesiòleg i número d’intents amb/sense redirigir l’agulla. Variable resposta: punció fàcil/difícil. Resultats i conclusions: variables predictives independents de dificultat: flexió dolenta/regular, palpació dolenta/regular d’estructures anatòmiques de referència i curvatura lumbar no convexa. Anatomia, edat i IMC van quedar excloses.

IPH response to Department of the Environment, Heritage and Local Government and the Department for Regional Development Spatial Strategies

The remit of the Institute of Public Health in Ireland (IPH) is to promote cooperation for public health between Northern Ireland and the Republic of Ireland in the areas of research and information, capacity building and policy advice. Our approach is to support Departments of Health and their agencies in both jurisdictions, and maximise the benefits of all-island cooperation to achieve practical benefits for people in Northern Ireland and the Republic of Ireland. As an all-island body, the Institute of Public Health in Ireland particularly welcomes that the Framework for Collaboration has been co-produced by the Department for Regional Development and the Department of the Environment, Heritage and Local Government. In addition the Institute of Public Health welcomes a more holistic approach to spatial planning that takes into account the environment and sustainable economic development. A clean environment and a more equitable distribution of prosperity have associated health benefits, as outlined in the IPH’s Active travel – healthy lives (2011) and Health impacts of the built environment- a review (2006).

IPH response to Department for Regional Development's Regional Development Strategy

Key points from the IPH response include: There is growing recognition that the leading causes of illness and death, including heart disease, cancer, respiratory diseases and injuries, may be exacerbated by elements within the built environment which contribute to sedentary lifestyles and harmful environments.  IPH call for greater recognition of the links between regional development and health.   Health inequalities are the preventable and unjust differences in health status experienced by certain population groups.  The RDS has a role to play in tackling health inequalities experienced in Northern Ireland.   Supporting a modal shift in transport methods can lead to improved health and reduced health inequalities.   The RDS plays an important role in addressing climate change which is identified as a major public health concern for the 21st Century.  Creating healthy sustainable places and communities can go hand in hand with reducing the negative impacts of climate change.   IPH recognise the RDS is an overarching strategic framework which will be implemented by a range of other agencies.  To fully appreciate the potential health impacts of the RDS, IPH call for a Health Impact Assessment to be undertaken to fully determine the links with health and potential impact on health inequalities particularly in relation to the implementation strategy.

IPH response to Revised Regional Transportation Strategy 2011

The increase in population and vehicles has placed significant pressures on Northern Ireland’s transportation networks coupled with fiscal constraints and the need to reduce our environmental impacts.  The revised Strategy concentrates on moving people rather than vehicles, creating space on the networks for people and also for freight and on maintaining what is in place and using it in a smarter way.  At its core is a move towards greater sustainability which will contribute positively to growing the economy, improving the quality of life for all and reducing the transport impacts on the environment.

IPH response to Draft Regional Planning Guidelines for the Greater Dublin Area 2010-2022

The Regional Planning Guidelines (RPG) for the Greater Dublin Area 2010-2022 (draft) is a policy document which aims to direct the future growth of the Greater Dublin Area over the medium to long term and works to implement the strategic planning framework set out in the National Spatial Strategy (NSS) published in 2002.  A series of recommendations have been made to Local Authorities clearly linked to and supporting the national investment in transport, particularly public transport, under Transport 21.  The draft was prepared and agreed for public consultation. The IPH response  to the consultation reports on how the RPG may impact on health and makes recommendations to maximise opportunities for health gain and minimise health loss.

IPH response to Department for Regional Development public transport reform consultation

This is the IPH response to the Department for Regional Development's public transport reform consultation.

IPH response to Department for Regional Development Regional Transportation Strategy Review

Travel behaviour can make a significant contribution to physical activity levels and subsequent risk of poor health including conditions such as obesity.  DRD can play a key role in tackling obesity in Northern Ireland through the Regional Transportation Strategy. This is the IPH's response. The Institute of Public Health in Ireland (IPH) aims to improve health on the island of Ireland by working to combat health inequalities and influence public policies in favour of health.  The Institute promotes cooperation between Northern Ireland and the Republic of Ireland in public health research, training and policy advice. IPH acknowledges that health is influenced by a wide range of social determinants, including economic, environmental, social and biological factors.  Transport is one of the key determinants of health and IPH welcomes the opportunity to comment on the Department for Regional Development (DRD), Regional Transportation Strategy (RTS) Review.

Improving Dementia Services in Northern Ireland - A Regional Strategy - November 2011

Improving Dementia Services in Northern Ireland - A Regional Strategy - November 2011

Regional Eligibility Criteria for the Provision of Wheelchairs Through the Northern Ireland Wheelchair Service (PDF 2.20 MB)

A Guide for wheelchair users on regional eligibility criteria for the provision of wheelchairs through the Northern Ireland Wheelchair Service

Regional Hidden Harm Action Plan (PDF 2.21MB)

Regional Hidden Harm Action Plan

Preliminary regional rockfall hazard mapping using LIDAR-based slope frequency distribution and CONEFALL modeling

A factor limiting preliminary rockfall hazard mapping at regional scale is often the lack of knowledge of potential source areas. Nowadays, high resolution topographic data (LiDAR) can account for realistic landscape details even at large scale. With such fine-scale morphological variability, quantitative geomorphometric analyses become a relevant approach for delineating potential rockfall instabilities. Using digital elevation model (DEM)-based ?slope families? concept over areas of similar lithology and cliffs and screes zones available from the 1:25,000 topographic map, a susceptibility rockfall hazard map was drawn up in the canton of Vaud, Switzerland, in order to provide a relevant hazard overview. Slope surfaces over morphometrically-defined thresholds angles were considered as rockfall source zones. 3D modelling (CONEFALL) was then applied on each of the estimated source zones in order to assess the maximum runout length. Comparison with known events and other rockfall hazard assessments are in good agreement, showing that it is possible to assess rockfall activities over large areas from DEM-based parameters and topographical elements.

Tackling Sexual Violence and Abuse - A regional Strategy 2008-2013 (PDF 20.2 MB)

Tackling Sexual Violence and Abuse - A regional Strategy 2008-2013