376 research outputs found
Countdown to 2010: Can we assess Ireland’s insect species diversity and loss?
peer-reviewedThe insects are the most diverse organisms on this planet and play an essential role in ecosystem functioning, yet we know very little about them. In light of the Convention on Biological Diversity,
this paper summarises the known insect species numbers for Ireland and questions whether this is a true refl ection of our insect diversity. The total number of known species for Ireland is 11,422.
Using species accumulation curves and a comparison with the British fauna, this study shows that the Irish list is incomplete and that the actual species number is much higher. However, even with
a reasonable knowledge of the species in Ireland, insects are such speciose, small, and inconspicuous animals that it is diffi cult to assess species loss. It is impossible to know at one point in time the
number of insect species in Ireland and, although it is useful to summarise the known number of species, it is essential that biodiversity indicators, such as the Red List Index, are developed
Impact of dairy manure addition on soil nutrients in northeast and south central Kansas
Sixty four percent of the fields (14 of 22) in northeast and south central Kansas would be able to apply dairy manure on a nitrogen basis if the current swine manure application regulations were adopted. Due to high phosphorus levels in some fields, two of the 11 fields in northeast Kansas could not have any manure applied to them. Two other fields in northeast and four fields in south central Kansas would have to limit manure application rates to annual phosphorus required by the crops. Our results indicate minimal accumulation of nitrogen and potassium in the soil profile.; Dairy Day, 2001, Kansas State University, Manhattan, KS, 2001
Inferring Species Trees Directly from Biallelic Genetic Markers: Bypassing Gene Trees in a Full Coalescent Analysis
The multi-species coalescent provides an elegant theoretical framework for
estimating species trees and species demographics from genetic markers.
Practical applications of the multi-species coalescent model are, however,
limited by the need to integrate or sample over all gene trees possible for
each genetic marker. Here we describe a polynomial-time algorithm that computes
the likelihood of a species tree directly from the markers under a finite-sites
model of mutation, effectively integrating over all possible gene trees. The
method applies to independent (unlinked) biallelic markers such as well-spaced
single nucleotide polymorphisms (SNPs), and we have implemented it in SNAPP, a
Markov chain Monte-Carlo sampler for inferring species trees, divergence dates,
and population sizes. We report results from simulation experiments and from an
analysis of 1997 amplified fragment length polymorphism (AFLP) loci in 69
individuals sampled from six species of {\em Ourisia} (New Zealand native
foxglove)
Timing and Reconstruction of the Most Recent Common Ancestor of the Subtype C Clade of Human Immunodeficiency Virus Type 1
Human immunodeficiency virus type 1 (HIV-1) subtype C is responsible for more than 55% of HIV-1 infections worldwide. When this subtype first emerged is unknown. We have analyzed all available gag (p17 and p24) and env (C2-V3) subtype C sequences with known sampling dates, which ranged from 1983 to 2000. The majority of these sequences come from the Karonga District in Malawi and include some of the earliest known subtype C sequences. Linear regression analyses of sequence divergence estimates (with four different approaches)were plotted against sample year to estimate the year in which there was zero divergence from the reconstructed ancestral sequence. Here we suggest that the most recent common ancestor of subtype C
appeared in the mid- to late 1960s. Sensitivity analyses, by which possible biases due to oversampling from one
district were explored, gave very similar estimates
Long term (5 Year) safety of bronchial thermoplasty: Asthma Intervention Research (AIR) trial
<b>Background:</b>
Bronchial thermoplasty (BT) is a bronchoscopic procedure that improves asthma control by reducing excess airway smooth muscle. Treated patients have been followed out to 5 years to evaluate long-term safety of this procedure.
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<b>Methods:</b>
Patients enrolled in the Asthma Intervention Research Trial were on inhaled corticosteroids ≥200 μg beclomethasone or equivalent + long-acting-beta2-agonists and demonstrated worsening of asthma on long-acting-β2-agonist withdrawal. Following initial evaluation at 1 year, subjects were invited to participate in a 4 year safety study. Adverse events (AEs) and spirometry data were used to assess long-term safety out to 5 years post-BT.
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<b>Results:</b>
45 of 52 treated and 24 of 49 control group subjects participated in long-term follow-up of 5 years and 3 years respectively. The rate of respiratory adverse events (AEs/subject) was stable in years 2 to 5 following BT (1.2, 1.3, 1.2, and 1.1, respectively,). There was no increase in hospitalizations or emergency room visits for respiratory symptoms in Years 2, 3, 4, and 5 compared to Year 1. The FVC and FEV1 values showed no deterioration over the 5 year period in the BT group. Similar results were obtained for the Control group.
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<b>Conclusions:</b>
The absence of clinical complications (based on AE reporting) and the maintenance of stable lung function (no deterioration of FVC and FEV1) over a 5-year period post-BT in this group of patients with moderate to severe asthma support the long-term safety of the procedure out to 5 years
Exploring young people’s experiences and perceptions of mental health and well-being using photography
© 2019 Association for Child and Adolescent Mental Health Introduction: The mental health of young people is a major global public health concern. A shift in focus towards children and young people’s mental health in the UK has emphasized young people’s voices, as of paramount importance in shaping the path for future quality care provision. The paper examines a study that aimed to explore young people’s perceptions of mental health and well-being using photographs. Method: The methodology employed for this study placed young people at the centre of the research process by using photographs to capture their experiences. Ten young people who attended a youth group used disposable cameras to take photographs of their experiences and perceptions of mental health and well-being. Semi-structured interviews with the young people elicited their narratives behind the images. Data were analysed using photo-elicitation and thematic analysis. Findings: Young people’s experiences of mental health and well-being were internalized and located predominantly in the private and hidden regions of their everyday lives. Stigma, social isolation and marginalization were prevalent whilst spirituality and connection with the environment expressed hope. Conclusion: Mental health appears to be firmly located in the private ‘back regions’ of young individuals’ lives, demonstrating that young people conceptualize these experiences as a vulnerable and hidden part of their being. Understanding the needs of this new generation of youth including the prevalence of stigma, risk of isolation and social exclusion are paramount. Future service provision needs to recognize the extent stigma impacts upon young people’s experiences of mental health and well-being
Inclusive Masculinities in a Working-Class Sixth Form in Northeast England
This research examines the construction of masculinity among a group of working-class boys aged sixteen to nineteen in the northeast of England. Drawing on data collected from a six-week ethnography with boys in a religious (Christian) sixth form college, this study documents how only a small minority of these boys embodied the orthodox archetype of masculinity that has traditionally been associated with working-class youth. Instead, the great majority of participants adopted attitudes and behaviors that can be categorized as a set of inclusive masculinities: They espoused positive attitudes toward homosexuality, engaged in physical tactility and emotional intimacy, and used homosexually themed language without the intent to wound or marginalize other boys. These findings pose a considerable challenge to dominant narratives on working-class masculinities; narratives that must now be reconfigured to account for the proliferation of inclusive masculinities among working-class youth
Measuring hsCRP—An Important Part of a Comprehensive Risk Profile or a Clinically Redundant Practice?
James McCormack and Michael Allan discuss issues and questions surrounding hsCRP measurements in patients
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