28,071 research outputs found

    Reasoned opinion on the modification of the existing MRLs for pymetrozine in lamb`s lettuce and beans (with pods)

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    <p>In accordance with Article 6 of Regulation (EC) No 396/2005, the Netherlands, herewith referred to as the evaluating Member State (EMS), received an application from LTO Groeiservice to modify the existing MRLs for pymetrozine in lamb`s lettuce and beans (with pods). In order to accommodate for the intended use of pymetrozine on these crops, the EMS proposed to raise the existing MRLs from 2 mg/kg to 15 mg/kg in lamb`s lettuce and to 7 mg/kg in beans (with pods). The EMS drafted an evaluation report according to Article 8 of Regulation (EC) No 396/2005, which was submitted to the European Commission and forwarded to EFSA. According to EFSA, the residue trials on lamb`s lettuce and beans (with pods) were not valid because the samples were stored for a period for which integrity of the samples is not guaranteed. The proposal to compensate for the potential loss of residues during storage by applying a correction factor is not acceptable because the instability of pymetrozine residues in watery matrices is not only affected by the nature of the crop, but might depend also on other factors such as the preparation of samples and the design of the residue decline studies. EFSA therefore concludes that the available data are not sufficient to derive a MRL proposal for lamb`s lettuce and beans (with pods) reflecting the intended GAP notified in this application.</p&gt

    Harbour porpoises (Phocoena phocoena) and wind farms: a case study in the Dutch North Sea

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    The rapid increase in development of offshore wind energy in European waters has raised concern for the possible environmental impacts of wind farms. We studied whether harbour porpoise occurrence has been affected by the presence of the Dutch offshore wind farm Egmond aan Zee. This was done by studying acoustic activity of porpoises in the wind farm and in two reference areas using stationary acoustic monitoring (with T-PODs) prior to construction (baseline: June 2003 to June 2004) and during normal operation of the wind farm (operation: April 2007 to April 2009). The results show a strong seasonal pattern, with more activity recorded during winter months. There was also an overall increase in acoustic activity from baseline to operation, in line with a general increase in porpoise abundance in Dutch waters over the last decade. The acoustic activity was significantly higher inside the wind farm than in the reference areas, indicating that the occurrence of porpoises in this area increased as well. The reasons of this apparent preference for the wind farm area are not clear. Two possible causes are discussed: an increased food availability inside the wind farm (reef effect) and/or the absence of vessels in an otherwise heavily trafficked part of the North Sea (sheltering effect

    Using citizen science to monitor pollination services

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    1. Pollination by insects is a vital ecosystem service and the need for its assessment is increasing in recognition and political pressure, but there are currently no large-scale systematic monitoring schemes in place to measure the direct provision of this service. 2. This study tested a protocol for using a citizen science approach to quantify pollination service provision in gardens and allotments, requiring participants to grow Vica faba L. plants and carry out some simple manipulations of the pollination environment (flowers with bees excluded, flowers hand-pollinated, or flowers left for local pollinators to visit). Volunteers assessed yield in the three treatments. 3. Eighty participants from across the U.K. successfully completed all parts of the protocol; a further 93 participants were unsuccessful but actively engaged with the project. 4. Overall, the present results suggest that pollination services for V. faba are currently not limiting in gardens or allotments in the U.K. It is possible and cost-effective to recruit volunteers to collect data on pollination deficits using this protocol. 5. The approach used in this paper, which could readily be extended to incorporate other plant species reliant on different guilds of pollinators, is feasible for adoption as a national monitoring scheme for pollination services. Key words. Bees, bumblebees, crop yield, ecosystem services, pollinator, urban, Viciafab

    Possibilities of upgrading solid underutilized lingo-cellulosic feedstock (carob pods) to liquid bio-fuel: Bio-ethanol production and electricity generation in fuel cells - A critical appraisal of the required processes

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    The exploitation of rich in sugars lingo-cellulosic residue of carob pods for bio-ethanol and bio-electricity generation has been investigated. The process could take place in two (2) or three (3) stages including: a) bio-ethanol production originated from carob pods, b) direct exploitation of bio-ethanol to fuel cells for electricity generation, and/or c) steam reforming of ethanol for hydrogen production and exploitation of the produced hydrogen in fuel cells for electricity generation. Surveying the scientific literature it has been found that the production of bio-ethanol from carob pods and electricity fed to the ethanol fuel cells for hydrogen production do not present any technological difficulties. The economic viability of bio-ethanol production from carob pods has not yet been proved and thus commercial plants do not yet exist. The use, however, of direct fed ethanol fuel cells and steam reforming of ethanol for hydrogen production are promising processes which require, however, further research and development (R&D) before reaching demonstration and possibly a commercial scale. Therefore the realization of power generation from carob pods requires initially the investigation and indication of the appropriate solution of various technological problems. This should be done in a way that the whole integrated process would be cost effective. In addition since the carob tree grows in marginal and partly desertified areas mainly around the Mediterranean region, the use of carob’s fruit for power generation via upgrading of its waste by biochemical and electrochemical processes will partly replace fossil fuels generated electricity and will promote sustainability

    The New Podagogy : Incorporating Podcasting into Journalism Education

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    This report documents the results of a pilot study of the use of podcasting technology in a lower division course at the University of Oregon School of Journalism and Communication. Based on a survey of 209 undergraduate students, the study reports high levels of usage and satisfaction with content and delivery, and suggests the technology added value to class content for students

    "It's Hands-On...": Cultivating Mentors and Emerging Social Justice Leaders through Shared Project Development: Documenting the Intergenerational and Community Dialogues: A Leadership for a Changing World Initiative

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    The Leadership for a Changing World (LCW) program seeks to transform the public perception that the U.S. is facing a shortage of leaders to address social, environmental, and economic issues within communities. The program asserts that leadership does exist, albeit in a form that is different from traditional understandings of leadership. LCW shifts the conversation about leadership to include leaders known in their own communities, but not known broadly. Over five years (2001-2005), the LCW program recognized 92 individual leaders and leadership teams based in organizations across the U.S. and Puerto Rico. As the program began to come to a close in 2005, the partners developed the idea of a regional forum, the Intergenerational and Community Dialogues, to address recurring concerns that award recipients identified: leadership development, succession, and the creation of sustainable community collaborations. The forum brought together LCW award recipients and emerging leaders from the Pacific Northwest to investigate and explore the challenges and opportunities of intergenerational leadership and community collaboration. This report documents the main ideas that emerged from the conversations of forum participants who explored their experiences cultivating mentors, leaders, and collaborative relationships. It is our hope that this document captures the perspectives, concerns, significant accomplishments, and energetic spirit of the initiative's participants

    Evaluation of oilseed rape seed yield losses caused by Leptosphaeria biglobosa in central China

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    This document is the Accepted Manuscript version of the following article: Xiang Cai, Yongju Huang, Daohong Jiang, Bruce D. L. Fitt, Guoqing Li, and Long Yang, "Evaluation of oilseed rape seed yield losses caused by Leptosphaeria biglobosa in central China", European Journal of Plant Pathology, first published 9 June 2017. Under embargo. Embargo end date: 9 June 2018. The final publication is available at Springer via: http://dx.doi.org/10.1007/s10658-017-1266-x.Phoma stem canker of oilseed rape (Brassica napus), caused by Leptosphaeria maculans/L. biglobosa is a globally important disease. Severe phoma stem canker symptoms have been observed on winter oilseed rape in China but the seed yield loss caused by this disease remains unknown. In May 2012 and May 2013, 17 and 13 crops were surveyed, respectively, in seven counties of Hubei Province, central China. Stems with phoma stem canker disease symptoms were sampled for pathogen isolation and identification. Only L. biglobosa was identified by culture morphology and species-specific PCR; no L. maculans was found. To evaluate the yield losses, yield components (number of branches per plant, number of pods per plant, 1000-seed weight, number of seeds per pod) were assessed on healthy and diseased plants sampled from crops in four counties and on plants from inoculated pot experiments (plants of three cultivars were inoculated at the green bud stage by injecting L. biglobosa conidia into the stem between the first and second leaf scars). Results of the field surveys showed that diseased plants had 14–61% less branches and 32–83% less pods than healthy plants, respectively. The estimated seed yield loss varied from 10% to 21% and from 13% to 37% in 2012 and 2013, respectively. In the pot experiments, there were no differences in numbers of branches or pods but there were differences in number of seeds per pod between inoculated and control plants. For the three cultivars tested, the inoculated plants had yield losses of 29–56% compared with the control. This study indicates that L. biglobosa could cause substantial seed yield loss in China.Peer reviewedFinal Accepted Versio

    Telehealth: acceptability, clinical interventions and quality of life in peritoneal dialysis

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    Introduction: Telehealth technologies are being widely adopted across the globe for management of long-term conditions. There are limited data on its use, effectiveness and patient experience in end-stage renal disease. The aim of this pilot project was to explore patient acceptability of technology and evaluate its effect on clinical interventions and quality of life in patients undergoing peritoneal dialysis. Methods: Peritoneal dialysis patients were provided with computer tablets (PODs). PODs contained a knowledge database with treatment- and symptom-based questionnaires that generated alerts for the clinical team. Alerts were reviewed daily and followed up by a telephone call or clinic visit. Interventions were at the discretion of clinicians. Data were recorded prospectively and quality of life and Quebec User Evaluation of Satisfaction with assistive Technology questionnaires evaluated at the start and end of the programme. Results: In all, 22 patients have participated over 15 months. The mean age was 61.6 years and PODs were utilised for an average of 341.9 days with 59.1% choosing to continue beyond the study period. We received a total of 1195 alerts with an average of 2.6 alerts per day. A total of 36 admissions were avoided and patients supported to self-manage on 154 occasions. Quebec User Evaluation of Satisfaction with assistive Technology scores remained high throughout the programme although no improvement in quality of life was seen. Discussion: Telehealth is useful to monitor patients with renal failure on peritoneal dialysis. It is acceptable across age groups and provides an additional resource for patients to self-manage. Satisfaction scores and retention rates suggest a high level of acceptability
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