Recovery of the Mersey Estuary from Metal Contamination

Merged with duplicate record 10026.1/596 on 27.03.2017 by CS (TIS)The Mersey Estuary has received significant quantities of industrial wastes and sewage over several decades. Although contaminant loads are reducing and the estuary is showing signs of recovery, the sediment reservoir remains a repository of historical contamination and still contains high concentrations of trace metals and organic compounds. A combination of hydrodynamic, sedimentary and geochemical processes are responsible for maintaining trace metal concentrations at present-day levels. The distributions of trace metals in bed sediments reflect changes in granulometry, differences in POC content and the magnitude of past inputs rather than the locations of point sources in the estuary. The association of contaminant metals with SPM varies not only with axial changes in salinity and particle concentration but also in response to the relative magnitudes of freshwater and tidal inflows and cyclic variations in water and particulate chemistry that occur on intratidal, intertidal and seasonal timescales. The most influential of these arise from axial changes in dissolved oxygen and the delivery of organic carbon from both external and internal sources which modify the relative degree of sorptive control exerted by Fe, Mn and organic C at different locations in the estuary and at different times. These factors, combined with the efficient trapping o f sediments and possible salting out of neutral metal-organic complexes, assist in the retention and internal recycling of particles and associated metals between the bed and water column. Geochemical reactivity is suppressed in Mersey SPM and metal decontamination is not predicted to occur through the loss of particulate metals to the surrounding coastal zone. Rather, it is envisaged that sediment resuspension and the desorption of metals into fresh and low salinity waters, supplemented by the release of metals from tidally stirred diagenetically modified sediments, are more likely to be important long term cleansing mechanisms, with the latter occurring particularly during the summer months when bacterial numbers and the degradation of accumulated organic detritus becomes more pronounced. Future declines in metals from bed sediments have been estimated using two methods and two independent data sets. Resulting values are not only metal-dependent but also vary with sediment location. Losses of Cd, Co, Cu, Hg, Ni and Zn are predicted to take up to 40 years, whilst removal of substantially elevated concentrations of Pb in sediments in the upper estuary could span hundreds of years.UK Environment Agency (North West Region

Making & Missing Opportunities: Part-Time Higher Education in the East of England

The research examines the extent to which undergraduate level part-time higher education contributes to economic and social development in the East of England. The regional economic strategy has called attention to the importance of higher education; but full-time study is simply not an option for the majority of people who did not, for whatever reason, progress to higher education from school and college. Part-time study, however, offers them the opportunity to engage with higher education whilst continuing to maintain the obligations of their family, social and working lives though it remains typically undervalued and under-resourced. The statistical study compares part-time and full-time study in the East of England and provides comparative analyses which establish that almost half of the total undergraduate population in the region and almost a third of those studying for a first degree are engaged in part-time study and that part-time students are far more likely to remain within the region on graduating than their full-time peers. Part time provision in the region is dominated by two institutions – the Open University and Anglia Ruskin University. This suggests that other institutions place less value and invest less in part-time study. These issues, and their complexities, are explored in greater detail through a series of narrative case studies illustrating the experiences of twelve part-time students from the region. These provide insight into the different reasons people have for studying part-time, the range of viable options available to them, the costs of part-time study and the factors that influence choice. Examples of part-time study in the private sector are also included in the report and we include an insight into the employers’ perspective of part-time study. The final sections address the ways in which individuals, institutions and industry can invest in part-time higher education and recommendations for realising its potential

How discipline shapes the meaning of value creation in higher education; implications for enterprise, entrepreneurship and employability.

This paper sets out the importance of teaching contextualized understandings of value within different disciplinary contexts in order to enhance employability and to foster greater levels of engagement with enterprise and entrepreneurship education. Key research has recognised the broader benefits of enterprise and entrepreneurship education, including that of developing graduate employability. Yet enterprise and entrepreneurship may not feel comfortable or relevant to students (EEUK, 2012; Henry, 2013). It has been identified that students can better relate to enterprise and entrepreneurship when it is contextualised in professions, sectors and communities of practice, moving away from a focus on venture creation and start up (Gibb, 2005). We argue that taking an approach which is explicitly based on value creation is a crucial driver of student engagement with enterprise and entrepreneurship education. This needs to be based in students’ individual values, embedded in their disciplines, and related to the communities of practice which as graduates they will go on to be part of. When grounded in the creation of value at an individual, disciplinary, and societal level, enterprise and entrepreneurship education can appeal to a wider constituency of students. In this paper, we discuss how value creation is understood in three diverse academic disciplines, Business, Biomedical Science and Music. Building on key research and drawing on our extensive practice as educators, we argue that explicitly foregrounding understandings of value within our different disciplinary contexts and developing appropriately contextualized, experiential forms of value creation-based pedagogy, is key to student engagement and enhances graduate employability

Studies on altered mafic igneous rocks and their metamorphism : a geochemical appraisal of the Sofala volcanics in Central Western New South Wales.

The Sofala Volcanics is an Ordovician unit of calc-alkaline affinity in which pyroxene-andesitic volcanic rocks and their Sedimentary derivatives predominate. These volcanic belong to an island arc environment and are associated with cherts, limy sediments and rare limestones. The carbonate rocks apparently provided a large amount of circulating CO rich fluid during greenschist metamorphism and consequently abundant carbonated and hydrated phases developed in the pyroxene~porphyritic volcanic rocks. The textures of the volcanic rocks are preserved in detail, even to the original compositional zoning of the igneous clinopyroxenes which are commonly replaced by carbonates and/or chlorite, quartz, talc, tremolite, etc. Vesicular textures are also well preserved as amygdalas; for example, within laths of metamorphic tremolite, where their former shapes are marked by trains of minute sphene granules. A comprehensive list of secondary assemblages is detailed in appendix A. On a larger scale the structure of the area is complex, involving overturned folding and faulting with associated cleavage development

Global epidemiology of vasculitis

The many forms of vasculitis are characterized by inflammation of blood vessels, leading to potentially long-term sequelae including vision loss, aneurysm formation and kidney failure. Accurate estimation of the incidence and prevalence has been hampered by the absence of reliable diagnostic criteria and the rarity of these conditions; however, much progress has been made over the past two decades, although data are still lacking from many parts of the world including the Indian subcontinent, China, Africa and South America. Giant cell arteritis occurs in those aged 50 years and over and seems to mainly affect persons of northern European ancestry, whereas Takayasu arteritis occurs mainly in those aged under 40 years. By contrast, Kawasaki disease mainly occurs in children aged under 5 years and is most common in children of Asian ancestry, and IgA vasculitis occurs in children and adolescents. Although much less common than giant cell arteritis, the different forms of antineutrophil cytoplasmic antibody-associated vasculitis are being increasingly recognized in most populations and occur more frequently with increasing age. Behçet syndrome occurs most commonly along the ancient silk road between Europe and China. Much work needs to be done to better understand the influence of ethnicity, geographical location, environment and social factors on the development of vasculitis

United on Sunday: The effects of secular rituals on social bonding and affect

Religious rituals are associated with health benefits, potentially produced via social bonding. It is unknown whether secular rituals similarly increase social bonding. We conducted a field study with individuals who celebrate secular rituals at Sunday Assemblies and compared them with participants attending Christian rituals. We assessed levels of social bonding and affect before and after the rituals. Results showed the increase in social bonding taking place in secular rituals is comparable to religious rituals. We also found that both sets of rituals increased positive affect and decreased negative affect, and that the change in positive affect predicted the change in social bonding observed. Together these results suggest that secular rituals might play a similar role to religious ones in fostering feelings of social connection and boosting positive affect

Practitioners’ understanding of barriers to accessing specialist support by family carers of people with dementia in distress

Distressing symptoms in dementia are hard to manage for many family carers. This article explores practitioners’ perceptions of the barriers to accessing skilled behaviour management support encountered by carers. A survey of cases referred to the English National Health Service (n = 5,360) was followed by in-depth group discussions and practitioner interviews. Data revealed that practitioners focused on care home residents or older people with mental health problems other than dementia, rather than community-dwelling people with dementia and families. Barriers to access included misperceptions about the nature of distressing behaviour affecting carers and structural limitations in the capacity of specialist services to respond to carers

The effects of cryogenically preserved sperm on the fertilization, embryonic development and hatching success of lumpfish C. lumpus

Under embargo until: 2023-09-10Lumpfish (C. lumpus) are used as cleaner fish in the Atlantic salmon (Salmo salar) farming industry to remove parasitic sea lice. At present, wild lumpfish broodstock are used which puts strain on wild populations. By successfully cryopreserving lumpfish sperm, the number of wild males required will be reduced and it enables the long-term storage of sperm for use in breeding programmes. The present study compared the use of fresh sperm and sperm which was cryogenically frozen for 24 h to test whether it is a viable method of preservation. The fresh and frozen sperm from 5 males was used (in equal volumes) to fertilize eggs pooled from 5 females and the difference between fertilization success, percentage of eggs which reached the eyed stage, and the hatching success was measured. A group of 100 hatched larvae were on-grown for two weeks to test whether there was a difference weight between treatment groups. The results of the trial showed that fresh sperm produced a significantly higher percentage of fertilized eggs (fresh 92.6 ± 0.8%, frozen 77.9 ± 1.8%, mean ± SEM), a higher percentage of eggs surviving to the eyed stage (fresh 93.9 ± 0.5% and frozen 80.8 ± 1.4%) and had a more successful hatch rate (fresh 72.3 ± 6.6% and frozen 63.6 ± 5.0%). There was no difference in mean weight (± SEM) of the two-week old larvae between treatments (fresh 0.63 g ± 0.024, frozen 0.59 g ± 0.028). In conclusion, this study showed that the same volume of cryogenically preserved lumpfish sperm produced fewer viable lumpfish larvae than fresh sperm. Despite this difference, the use of cryopreserved sperm did produce relatively high results at each stage of testing.acceptedVersio

Blocking mu-opioid receptors inhibits social bonding in rituals

Religious rituals are universal human practices that play a seminal role in community bonding. In two experiments, we tested the role of mu-opioids as the active factor fostering social bonding. We used a mu-opioid blocker (naltrexone) in two double-blind studies of rituals from different religious traditions. We found the same effect across both studies, with naltrexone leading to significantly lower social bonding compared with placebo. These studies suggest that mu-opioids play a significant role in experiences of social bonding within ritual contexts