Fidest – Agenzia giornalistica/press agency

Quotidiano di informazione – Anno 31 n° 301

Posts Tagged ‘exposure’

Pubblicato il volume Exposure to Engineered Nanomaterials in the Environment

Posted by fidest press agency su lunedì, 15 luglio 2019

Nel mese di giugno è uscito per l’editore Elsevier il volume Exposure to Engineered Nanomaterials in the Environment, i cui editori sono il professore emerito dell’Università di Parma Nelson Marmiroli, Jing Song della Chinese Academy of Sciences e Jason White della Connecticut Agricultural Experiment Station, USA.L’idea è nata nel luglio 2017, nel corso della terza edizione del Convegno “PARMA” NANO-DAY. In quel periodo, Nelson Marmiroli e Jason White hanno presentato a Elsevier una proposta per un libro sulle nanotecnologie, nell’ambito della serie “Micro and Nano Technologies”: la necessità di un testo in questo settore era sentita soprattutto dai giovani ricercatori che operano nel campo delle nanotecnologie e delle loro applicazioni.L’idea formativa era di mettere a disposizione dei giovani ricercatori e di coloro che vogliono avvicinarsi a questo innovativo campo di ricerca un testo che che raccogliesse lo stato dell’arte nei diversi settori, agricoltura e alimenti, cosmetici, vita lavorativa, ambiente, però con un’ottica di “text book” in grado di dare veramente gli aspetti fondamentali insieme a quelli più avanzati. Sono stati anche inseriti capitoli dedicati agli aspetti etici e sociali, educativi, legali.
A questo testo hanno contribuito, oltre al prof. Marmiroli, diversi docenti e ricercatori dell’Ateneo e del CNR-IMEM: Massimiliano Bianchi, Ovidio Bussolati, Davide Calestani, Cristina Caffarra, Martina Chiu, Maricla Galetti, Amparo Guerrero Gerboles, Elena Maestri, Marta Marmiroli, Michele Miragoli, Luca Pagano, Stefano Rossi, Roberta Ruotolo, Giuseppe Taurino. L’Università di Parma in particolare si è distinta per i capitoli sugli aspetti tossicologici e legati alle applicazioni in medicina. Molti degli autori avevano già collaborato insieme in pubblicazioni peer reviewed internazionali.La scrittura dei capitoli ha consentito a ogni gruppo di lavoro di esporre i risultati delle proprie ricerche nel contesto del quadro internazionale delle nanotecnologie, con una attenzione alla formazione che non sempre si ritrova nei libri troppo specialistici. È quindi un libro destinato a durare nel tempo, di facile consultazione sia per gli specialisti che per gli studenti.La prefazione del libro è stata scritta da Mihail C. Roco, fondatore negli USA del comitato per le nanotecnologie (NSET) del U.S. National Science and Technology Council e della National Nanotechnology Initiative (NNI). In essa si afferma che «questo volume presenta una notevole selezione di contributi di ricerca inerenti la sicurezza dei nanomateriali, dalla progettazione alla esposizione in sistemi naturali e antropici, alle implicazioni sociali e alla loro accettazione. […] Questo volume ha riunito alcune delle menti più brillanti negli studi su nanotecnologie ed esposizione. Incoraggiamo tutti gli esperti dell’accademia e dell’industria a leggere attentamente questi contributi».

Posted in Recensioni/Reviews | Contrassegnato da tag: , , | Leave a Comment »

Chubb becomes latest insurer to cut coal exposure

Posted by fidest press agency su sabato, 6 luglio 2019

The US insurer Chubb has said that it will phase out its exposure to coal by ceasing to underwrite or invest in most new coal generation. The company will no longer underwrite any new risks for companies that make 30 per cent or more of their revenues from coal, or any new coal-fired plants. It will phase out its existing insurance cover of companies that do not meet its new standards by 2022, while its asset management arm will no longer invest in any companies that make more than 30 per cent of their revenues from coal.
“Chubb recognizes the reality of climate change and the substantial impact of human activity on our planet,” said Evan G. Greenberg, chairman and CEO of Chubb. “Making the transition to a low-carbon economy involves planning and action by policymakers, investors, businesses and citizens alike. The policy we are implementing today reflects Chubb’s commitment to do our part as a steward of the Earth.”The company is only the latest insurer to begin to reduce its investments in coal power, which is a major contributor of greenhouse gas emissions. Insurers representing around 20 per cent of the global assets under management in the sector have now begun to divest from the fuel, both because of the climate impact and the risk that the assets will become “stranded” due to changes in policy and in the economics of energy generation. (font: cmail19.com, signed by: responsiblebusiness.com; global initiative 133 Cecil Street Keck Seng Tower #17-02A Singapore 069535)

Posted in Estero/world news, Uncategorized | Contrassegnato da tag: , , | Leave a Comment »

Study reveals low adoption of advice to reduce nuclear cardiology radiation exposure

Posted by fidest press agency su giovedì, 11 Mag 2017

viennaVienna, Austria. A study in 65 countries has revealed low adoption of International Atomic Energy Agency recommendations to reduce nuclear cardiology radiation exposure. The research is presented today at ICNC 2017 by Dr Edward Hulten, a cardiologist at the Walter Reed National Military Medical Center, Bethesda, USA. Nuclear cardiology uses small amounts of radioactive tracers which are injected into the veins and taken up by the heart. A gamma camera images the radiation from the tracer. The cardiac images are used to measure the heart size and function, identify coronary heart disease, and predict the risk of a heart attack.Dr Hulten said: “Nuclear cardiology is a key part of contemporary cardiology management and around 15 to 20 million procedures are performed annually. It gives information regarding diagnosis, prognosis, and the effects of therapeutic interventions.”“Concerns have been raised about tests, including nuclear cardiology, that expose patients to ionising medical radiation,” he continued. “Medical radiation potentially raises the lifetime risk of cancer which is important for all patients, especially younger patients or when considering additional radiation over time from further medical studies.”
A goal of 9 mSv or less radiation exposure per scan was recommended by the American Society of Nuclear Cardiology (ASNC) in 2010. It was noted in a 2016 International Atomic Energy Agency (IAEA) nuclear cardiology guideline but not formally endorsed as a recommendation.
The IAEA developed eight quality metrics for responsible radiation use in nuclear cardiology: avoiding thallium 201 stress testing, avoiding dual isotope testing, avoiding too much technetium-99m and thallium 201, using stress only imaging, use of camera technologies to reduce dose, use of weight based dosing strategies for technetium-99m, and avoiding inappropriate dosing that can lead to “shine-through” artefacts.The IAEA Nuclear Cardiology Protocols Study (INCAPS) assessed adherence to the eight quality metrics. The present analysis investigated which metrics were most helpful in meeting the ASNC’s 9 mSv target. During one week in 2013, 308 nuclear cardiology laboratories were studied in 65 countries in Africa, Asia, Europe, Latin America, North America, and Oceania. The survey included 7911 nuclear cardiology scans. There was significant variability in adherence to the quality metrics across laboratories and regions. There was low adherence overall, with the majority of sites implementing less than half of the quality metrics.
When the researchers performed multivariable logistic regression analysis, they found that the practices most strongly associated with achieving a 9 mSv or less scan were the use of stress or rest only imaging, avoiding thallium, and use of camera technologies to reduce radiation dose. Dr Hulten said: “When the 9 mSv recommendation was made in 2010 it was suggested that it should be achieved in 50% of scans by 2014. The INCAPS survey shows that there is still work to do. It is possible to reduce radiation exposure with existing techniques. Cadmium zinc telluride (CZT) cameras are more sensitive and allow for reduced dose scanning. With certain tracers you can achieve 1 mSv or less. But some scans use more than 30 mSv, so there is huge variability.” Not every site has all of the hardware and technology, said Dr Hulten, so the first step is to look at what is possible within each lab. He said: “There are improvements every lab can make regardless of money – for example multiple position imaging, weight based dosing and stress only techniques. They do require adapting existing workflows which takes leadership but they should be feasible in most labs.” He added: “Eventually cameras wear out and perhaps the decision on a replacement could factor in a reduced radiation dose which also lowers false positive tests and has the potential to reduce lab costs.” Dr Hulten concluded: “The INCAPS survey is a crucial step towards improving patient care in the field of nuclear cardiology by quantifying worldwide adherence to best practices. Any test involving ionising radiation will increase cancers within a population but the risk must be weighed against the benefit of gaining information about heart disease. The 9 mSv goal is achievable, and the lower the better.”

Posted in Estero/world news, Medicina/Medicine/Health/Science | Contrassegnato da tag: , , | Leave a Comment »

Red Cross urges governments to protect people on the move as freezing

Posted by fidest press agency su lunedì, 23 novembre 2015

budapestBudapest/Geneva. Plunging temperatures are expected to chill Europe this weekend putting the lives of thousands of refugees at risk, according to the International Federation of Red Cross and Red Crescent Societies (IFRC).The IFRC is calling on all governments to take steps to protect people seeking safety and ensure their suffering is not compounded as the weather deteriorates as well as urging all organisations to step-up and meet increasing needs.Director of the IFRC in Europe, Simon Missiri, said: “Winter looks set to arrive in the next few days, putting lives at risk and making a difficult situation for hundreds of thousands of people even more dire.Missiri said: “It is vital that governments make protection a priority – people are already facing an immense struggle. We all need to play a part in striving to ensure this doesn’t become significantly worse.”With temperatures predicted to plummet as low as minus 4C in parts of the Balkans and central Europe and daytime highs hovering around zero, people making the difficult cross-continent journey urgently need winter supplies. Hypothermia and exposure are among the main health concerns as people face days making the journey across Europe to safety. Sub-zero conditions will put people at risk – especially older people, children and those who are already suffering from illness. Red Cross medics also fear the psychological impact of worsening weather on people who have already suffered immense hardship.IFRC disaster management co-ordinator, Cristina Estrada, said: “One of our teams in the Former Yugoslav Republic of Macedonia recently met a woman who was 97 and had travelled from Syria – it’s hard to imagine how those most vulnerable people will cope with the coming months of bitter weather.”The Red Cross has been stockpiling supplies to cope with the onset of a brutal winter and is prioritizing hot meals, warm clothing, shoes and socks, blankets and sleeping bags, sourcing temporary heated accommodation, particularly across the Balkan route. High-energy food for children will be provided and there will be an increase in the number of mobile health teams and medics operating along the routes.Estrada said: “People are arriving at borders with very few belongings and in many cases, only the clothes on their backs. We are gravely concerned about the impact of freezing conditions.“We are scaling up to cope but we are dealing with the biggest movement of people for a generation and the needs are staggering.”
The Red Cross is responding with more than 50,000 volunteers across 28 countries and has reached at least 370,000 people in transit. More than 2.1 million meals and food parcels have been provided and 190,000 medical cases have been treated across Europe. More than 84,000 people have also received psychological support. The IFRC has today (Friday) expanded its emergency appeals to more than 71.5 million Swiss francs fund vital work responding to population movement across Europe. An additional 1.5 million Swiss francs will focus on aid coordination and increased flexibility to allow the Red Cross and Red Crescent to quickly adapt its response to this complex crisis.

Posted in Estero/world news, Medicina/Medicine/Health/Science | Contrassegnato da tag: , | Leave a Comment »