3,895 research outputs found
New Experimental Limits on Macroscopic Forces Below 100 Microns
Results of an experimental search for new macroscopic forces with Yukawa
range between 5 and 500 microns are presented. The experiment uses 1 kHz
mechanical oscillators as test masses with a stiff conducting shield between
them to suppress backgrounds. No signal is observed above the instrumental
thermal noise after 22 hours of integration time. These results provide the
strongest limits to date between 10 and 100 microns, improve on previous limits
by as much as three orders of magnitude, and rule out half of the remaining
parameter space for predictions of string-inspired models with low-energy
supersymmetry breaking. New forces of four times gravitational strength or
greater are excluded at the 95% confidence level for interaction ranges between
200 and 500 microns.Comment: 25 Pages, 7 Figures: Minor Correction
Chronic bilateral heel pain in a child with Sever disease: case report and review of literature
We are presenting a case report of a 10-year-old male with a 1 year history of bilateral heel pain. Sever disease is self limiting condition of calcaneal apophysis. It is the most common cause of heel pain in the growing child. There is no documented case of this condition in this region. This case highlights the clinical features of this self limiting disorder as seen in this patient and reviews the current literature
Podoconiosis and soil-transmitted helminths (STHs): double burden of neglected tropical diseases in Wolaita zone, rural southern Ethiopia
Background
Both podoconiosis and soil-transmitted helminth (STH) infections occur among barefoot people in areas of extreme poverty; however, their co-morbidity has not previously been investigated. We explored the overlap of STH infection and podoconiosis in Southern Ethiopia and quantified their separate and combined effects on prevalent anemia and hemoglobin levels in podoconiosis patients and health controls from the same area.
Methods and Principal Findings
A two-part comparative cross-sectional study was conducted in Wolaita zone, southern Ethiopia. Data were collected from adult patients presenting with clinically confirmed podoconiosis, and unmatched adult neighborhood controls living in the same administrative area. Information on demographic and selected lifestyle factors was collected using interviewer-administered questionnaires. Stool samples were collected and examined qualitatively using the modified formalin-ether sedimentation method. Hemoglobin level was determined using two different methods: hemoglobinometer and automated hematology analyzer. A total of 913 study subjects (677 podoconiosis patients and 236 controls) participated. The prevalence of any STH infection was 47.6% among patients and 33.1% among controls (p<0.001). The prevalence of both hookworm and Trichuris trichiura infections was significantly higher in podoconiosis patients than in controls (AOR 1.74, 95% CI 1.25 to2.42, AOR 6.53, 95% CI 2.34 to 18.22, respectively). Not wearing shoes and being a farmer remained significant independent predictors of infection with any STH. There was a significant interaction between STH infection and podoconiosis on reduction of hemoglobin level (interaction p value = 0.002).
Conclusions
Prevalence of any STH and hookworm infection was higher among podoconiosis patients than among controls. A significant reduction in hemoglobin level was observed among podoconiosis patients co-infected with hookworm and ānon-hookworm STHā. Promotion of consistent shoe-wearing practices may have double advantages in controlling both podoconiosis and hookworm infection in the study area
Segmenting consumers of meat and dairy products from five European countries: Implications for promoting sustainable food choices
Accelerating the transition of agri-food systems towards higher sustainability requires greater understanding of consumersā decision-making related to sustainable food choices, together with competing drivers which may result in unsustainable food choice demand. Meat and dairy production systems negatively contribute to greenhouse gas targets, unless sustainable production methods are applied, and these are understood by consumers and used in food choices. The psychological factors determining consumersā attitudes towards sustainably produced meat and dairy products were assessed. Data were collected through an online survey across five European countries (Czechia, Spain, Sweden, Switzerland, and the United Kingdom) (n = 2,490) in November 2021. The results showed consumers perceived food sustainability to be less important than sensory and healthiness attributes. UK consumers showed the strongest intentions to increase consumption of sustainably produced meat and dairy products. In contrast, Swiss consumers demonstrated the weakest intentions. A twostage cluster analysis based on consumersā perceived attribute importance identified four distinct segments: low food involvement (19.6%), high food involvement (31.9%), price-sensitive (23.2%), and health- and sustainability-involved (25.3%) consumer segments. Respondents in low food involvement and price-sensitive consumer segments tended to be younger and have lower environmental preservation attitudes and were more prevalent in Switzerland and Czechia. Those in high food involvement and health- and sustainability-involved consumer segments perceived higher importance of food sustainability and were more prevalent in Spain and Sweden. These respondents expressed greater intentions to increase consumption of sustainably produced meat and dairy products, at the same time being more likely to recognise the utility of sustainability labelling information. Animal welfare information was perceived to be most important for respondents in all the segments with the exception of those in the price-sensitive consumer segment. Building on the results, recommendations for promoting consumer sustainable food choices are propose
Capability of common SNPs to tag rare variants
Genome-wide association studies are based on the linkage disequilibrium pattern between common tagging single-nucleotide polymorphisms (SNPs) (i.e., SNPs having only common alleles) and true causal variants, and association studies with rare SNP alleles aim to detect rare causal variants. To better understand and explain the findings from both types of studies and to provide clues to improve the power of an association study with only common SNPs genotyped, we study the correlation between common SNPs and the presence of rare alleles within a region in the genome and look at the capability of common SNPs in strong linkage disequilibrium with each other to capture single rare alleles. Our results indicate that common SNPs can, to some extent, tag the presence of rare alleles and that including SNPs in strong linkage disequilibrium with each other among the tagging SNPs helps to detect rare alleles
Total versus partial knee replacement in patients with medial compartment knee osteoarthritis : the TOPKAT RCT
Article history The research reported in this issue of the journal was funded by the HTA programme as project number 08/14/08. The contractual start date was in January 2010. The draft report began editorial review in February 2019 and was accepted for publication in October 2019. The authors have been wholly responsible for all data collection, analysis and interpretation, and for writing up their work. The HTA editors and publisher have tried to ensure the accuracy of the authorsā report and would like to thank the reviewers for their constructive comments on the draft document. However, they do not accept liability for damages or losses arising from material published in this report. Acknowledgements TOPKAT study group Chief investigator David Beard. Trial co-investigators Nigel Arden (Oxford), Helen Campbell (Oxford), Marion Campbell (Aberdeen), Andrew Carr (Oxford), Jonathan Cook (Aberdeen then Oxford), Helen Doll (Oxford), Ray Fitzpatrick (Oxford), David Murray (Oxford) and Andrew Price (Oxford). Trial management Mayret Castillo (until 2011), Cushla Cooper, Loretta Davies, Anne Duncan (until 2017), Gordon Fernie, Sophie Halpin (until 2015) and Alison McDonald. Trial administration Katie Chegwin, Jiyang Li (until 2018), Elena Rabaiotti (until 2013), Sandra Regan (until 2012) and Victoria Stalker (until 2014). Data management Diana Collins (until 2013), Janice Cruden, Akiko Greshon, Kay Holland and Beverley Smith (until 2017). Database/programming management Gladys McPherson. Trial statisticians Charles Boachie (until 2013), Jemma Hudson and Graeme MacLennan. Health economists Helen Campbell (until 2015), Francesco Fusco (until 2018), Seamus Kent and Jose Leal. We would also like to thank Hannah Wilson (DPhil student, University of Oxford) for her help with the update to the literature search. Research teams We are grateful to the participants and research teams at collaborating hospital sites: Aneurin Bevan University Health Board, Royal Gwent Hospital Ruth Jenkins, Mark Lewis [principal investigator (PI)] and Witek Mintowt-Czyz. Belfast Health and Social Care Trust, Musgrove Park Hospital, Belfast David Beverland (PI), Leeann Bryce, Julie Catney, Ian Dobie, Emer Doran and Seamus OāBrien. Chesterfield Royal Hospital NHS Foundation Trust Fazal Ali, Heather Cripps, Amanda Whileman, Phil Williams (PI) and Julie Toms. County Durham and Darlington NHS Foundation Trust Ellen Brown, Gillian Horner, Andrew Jennings (PI) and Glynis Rose. East Lancashire Hospitals NHS Trust, Royal Blackburn Hospital Frances Bamford, Wendy Goddard, Hans Marynissen (PI), Haleh Peel and Lyndsey Richards. Great Western Hospitals NHS Foundation Trust, Swindon Amanda Bell, Sunny Deo, Sarah Grayland, David Hollinghurst, Suzannah Pegler, Venkat Satish (PI) and Claire Woodruffe. Harrogate and District NHS Foundation Trust, Harrogate Nick London (PI), David Duffy, Caroline Bennett and James Featherstone. Hull and East Yorkshire Hospitals NHS Trust Joss Cook, Kim Dearnley, Nagarajan Muthukumar (PI), Laura Onuoha and Sarah Wilson. Maidstone and Tunbridge Wells NHS Trust, Medway Sandhu Banher, Eunice Emeakaroha, Jamie Horohan, Sunil Jain (PI) and Susan Thompson. Mid Yorkshire Hospitals NHS Trust Sarah Buckley, Aaron Ng (PI), Ajit Shetty and Karen Simeson. Milton Keynes University Hospital NHS Foundation Trust Julian Flynn, Meryl Newsom, Cheryl Padilla-Harris and Oliver Pearce (PI). NHS Grampian, Woodend Hospital, Aberdeen James Bidwell (PI), Alison Innes, Winifred Culley and Bill Ledingham and Janis Stephen. North Bristol NHS Trust Rachel Bray, Hywel Davies, Debbie Delgado, Jonathan Eldridge, Leigh Morrison, James Murray (PI), Andrew Porteous and James Robinson. North Cumbria University Hospitals NHS Trust, Carlisle Matt Dawson (PI), Raj Dharmarajan, David Elson, Will Hage, Nicci Kelsall and Mike Orr. North Tees and Hartlepool NHS Foundation Trust, Stockton-On-Tees Jackie Grosvenor, SS Maheswaran (PI), Claire McCue, Hemanth Venkatesh, Michelle Wild and Deborah Wilson. Oxford University Hospitals NHS Trust, Nuffield Orthopaedic Centre Chris Dodd, William Jackson (PI), Pam Lovegrove, David Murray, Jennifer Piper and Andrew Price. Royal United Hospitals Bath NHS Foundation Trust, Bath Neil Bradbury, Lucy Clark, Stefanie Duncan, Genevieve Simpson and Allister Trezies (PI). Sherwood Forest Hospitals NHS Foundation Trust, Kings Mill Hospital, Sutton in Ashfield Vikram Desai (PI), Cheryl Heeley, Kramer Guy and Rosalyn Jackson. South Devon Healthcare NHS Foundation Trust, Torbay Alan Hall, Gordon Higgins (PI), Michael Hockings, David Isaac and Pauline Mercer. Stockport NHS Foundation Trust, Stockport Lindsey Barber, Helen Cochrane, Janette Curtis, Julie Grindey, David Johnson (PI), and Phil Turner. The Hillingdon Hospitals NHS Trust David Houlihan-Burne (PI), Briony Hill, Ron Langstaff and Mariam Nasseri. The Ipswich Hospital NHS Trust, Ipswich Mark Bowditch, Chris Martin, Steven Pryke, Bally Purewal, Chris Servant (PI), Sheeba Suresh and Claire Tricker. University Hospitals of Leicester NHS Trust, Leicester Robert Ashford, Manjit Attwal, Jeanette Bunga, Urjit Chatterji, Susan Cockburn, Colin Esler (PI), Steven Godsiff, Tim Green, Christina Haines and Subash Tandon. University Hospitals of North Midlands NHS Trust, Stoke on Trent Racquel Carpio, Sarah Griffiths, Natalie Grocott and Ian dos Remedios (PI). University Hospital Southampton NHS Foundation Trust David Barrett, Phil Chapman-Sheath, Caroline Grabau, Jane Moghul, William Tice (PI) and Catherine Trevithick. United Lincolnshire Hospitals NHS Trust, Boston Rajiv Deshmukh, Mandy Howes, Kimberley Netherton, Dipak Raj (PI) and Nikki Travis. United Lincolnshire Hospitals NHS Trust, Lincoln Mohammad Maqsood, Rebecca Norton, Farzana Rashid, Alison Raynor, Mark Rowsell and Karen Warner. We would like to thank the external members of the TSC and DMC for their advice and support for the project. Trial Steering Committee Donna Dodwell as our patient representative, Simon Donell (chairperson) (University of East Anglia), Shawn Tavares (Royal Berkshire Hospital) and Jonathan Waite (South Warwickshire NHS Foundation Trust). Data Monitoring Committee Karen Barker (Oxford University Hospitals NHS Foundation Trust), Gordon Murray (chairperson) (University of Edinburgh) and Hamish Simpson (University of Edinburgh). Independent review and interpretation of results Professor David Torgerson (University of York). Professor Chris Maher (University of Sydney). Mr Peter Brownson (The Royal Liverpool and Broadgreen University Hospitals NHS Trust). Professor Simon Donell (University of East Anglia, Norwich). Mr Mark Mullins (Abertawe Bro Morgannwg University Health Board). Professor Jane Blazeby (Bristol University).Peer reviewedPublisher PD
Cost-effectiveness of initiating extrafine- or standard size-particle inhaled corticosteroid for asthma in two health-care systems: a retrospective matched cohort study
Data acquisition and analyses were funded by Teva Pharmaceuticals
European Permanent Grasslands: A Systematic Review of Economic Drivers of Change, Including a Detailed Analysis of the Czech Republic, Spain, Sweden, and UK
\ua9 2024 by the authors. Permanent grasslands (PG) feature in the European rural landscape and represent a major agricultural production resource. They support multiple non-provisioning ecosystem services (ES), including climate regulation, flood control, biodiversity, and pollination. PG are at risk of loss or degradation due to agricultural land use and land management changes. The objective of this systematic review is to identify the main economic influences shaping management and maintenance of PG, and the risks and opportunities for delivery of a range of ES. A total of 51 papers were included. Relevant policy interventions and economic drivers are identified in relation to how they shape the management of EU grasslands over time and across farming systems, countries, or biogeographic zones. A high reliance on public payments from the EU Common Agricultural Policy (CAP), with uneven impact on mitigating PG losses and associated ES provisions, was identified, which needs to be considered in relation to ongoing CAP reform. There is a gap in the literature regarding economic tipping points for change. Future research needs to identify and map ES provisions by PG along with trade-offs and synergies, and link this to policy. There are substantive challenges to maintaining Europeās PG area and management, which must be addressed through EU-wide instruments
Bioluminescent human breast cancer cell lines that permit rapid and sensitive in vivo detection of mammary tumors and multiple metastases in immune deficient mice
INTRODUCTION: Our goal was to generate xenograft mouse models of human breast cancer based on luciferase-expressing MDA-MB-231 tumor cells that would provide rapid mammary tumor growth; produce metastasis to clinically relevant tissues such as lymph nodes, lung, and bone; and permit sensitive in vivo detection of both primary and secondary tumor sites by bioluminescent imaging. METHOD: Two clonal cell sublines of human MDA-MB-231 cells that stably expressed firefly luciferase were isolated following transfection of the parental cells with luciferase cDNA. Each subline was passaged once or twice in vivo to enhance primary tumor growth and to increase metastasis. The resulting luciferase-expressing D3H1 and D3H2LN cells were analyzed for long-term bioluminescent stability, primary tumor growth, and distal metastasis to lymph nodes, lungs, bone and soft tissues by bioluminescent imaging. Cells were injected into the mammary fat pad of nude and nude-beige mice or were delivered systemically via intracardiac injection. Metastasis was also evaluated by ex vivo imaging and histologic analysis postmortem. RESULTS: The D3H1 and D3H2LN cell lines exhibited long-term stable luciferase expression for up to 4ā6 months of accumulative tumor growth time in vivo. Bioluminescent imaging quantified primary mammary fat pad tumor development and detected early spontaneous lymph node metastasis in vivo. Increased frequency of spontaneous lymph node metastasis was observed with D3H2LN tumors as compared with D3H1 tumors. With postmortem ex vivo imaging, we detected additional lung micrometastasis in mice with D3H2LN mammary tumors. Subsequent histologic evaluation of tissue sections from lymph nodes and lung lobes confirmed spontaneous tumor metastasis at these sites. Following intracardiac injection of the MDA-MB-231-luc tumor cells, early metastasis to skeletal tissues, lymph nodes, brain and various visceral organs was detected. Weekly in vivo imaging data permitted longitudinal analysis of metastasis at multiple sites simultaneously. Ex vivo imaging data from sampled tissues verified both skeletal and multiple soft tissue tumor metastasis. CONCLUSION: This study characterized two new bioluminescent MDA-MB-231-luc human breast carcinoma cell lines with enhanced tumor growth and widespread metastasis in mice. Their application to current xenograft models of breast cancer offers rapid and highly sensitive detection options for preclinical assessment of anticancer therapies in vivo
Multifield Dynamics in Higgs-otic Inflation
In Higgs-otic inflation a complex neutral scalar combination of the and
MSSM Higgs fields plays the role of inflaton in a chaotic fashion. The
potential is protected from large trans-Planckian corrections at large inflaton
if the system is embedded in string theory so that the Higgs fields parametrize
a D-brane position. The inflaton potential is then given by a DBI+CS D-brane
action yielding an approximate linear behaviour at large field. The inflaton
scalar potential is a 2-field model with specific non-canonical kinetic terms.
Previous computations of the cosmological parameters (i.e. scalar and tensor
perturbations) did not take into account the full 2-field character of the
model, ignoring in particular the presence of isocurvature perturbations and
their coupling to the adiabatic modes. It is well known that for generic
2-field potentials such effects may significantly alter the observational
signatures of a given model. We perform a full analysis of adiabatic and
isocurvature perturbations in the Higgs-otic 2-field model. We show that the
predictivity of the model is increased compared to the adiabatic approximation.
Isocurvature perturbations moderately feed back into adiabatic fluctuations.
However, the isocurvature component is exponentially damped by the end of
inflation. The tensor to scalar ratio varies in a region ,
consistent with combined Planck/BICEP results.Comment: 35 pages, 11 figure
- ā¦