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https://www.readbyqxmd.com/read/29149918/oxygen-transfer-in-moving-bed-biofilm-reactor-and-integrated-fixed-film-activated-sludge-processes
#1
(no author information available yet)
A demonstrated approach to design the, so-called, medium-bubble air diffusion network for oxygen transfer into the aerobic zone(s) of moving bed biofilm reactor (MBBR) and integrated fixed-film activated sludge (IFAS) processes is described in this paper. Operational full-scale biological water resource recovery systems treating municipal sewerage demonstrate that medium-bubble air diffusion networks designed using the method presented here provide reliable service. Further improvement is possible, however, as knowledge gaps prevent more rational process designs...
November 17, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/29149879/risk-management-of-emergency-service-vehicle-crashes-in-the-united-states-fire-service-process-outputs-and-recommendations
#2
David P Bui, Keshia P Porter, Stephanie Griffin, Dustin D French, Alesia M Jung, Stephen Crothers, Jefferey L Burgess
BACKGROUND: Emergency service vehicle crashes (ESVCs) are a leading cause of death in the United States fire service. Risk management (RM) is a proactive process for identifying occupational risks and reducing hazards and unwanted events through an iterative process of scoping hazards, risk assessment, and implementing controls. We describe the process, outputs, and lessons learned from the application of a proactive RM process to reduce ESVCs in US fire departments. METHODS: Three fire departments representative of urban, suburban, and rural geographies, participated in a facilitated RM process delivered through focus groups and stakeholder discussion...
November 17, 2017: BMC Public Health
https://www.readbyqxmd.com/read/29149802/associations-of-short-term-exposure-to-ambient-air-pollutants-with-emergency-ambulance-calls-for-the-exacerbation-of-essential-arterial-hypertension
#3
Jone Vencloviene, Agne Braziene, Audrius Dedele, Kristina Lopatiene, Paulius Dobozinskas
We investigated the association between daily emergency ambulance calls (EAC) for elevated blood pressure that occurred during the time intervals of 8:00-13:59, 14:00-21:59, and 22:00-7:59, and exposure to CO, PM10, and ozone. We used Poisson regression to explore the association between the risk of EAC and short-term variation of pollutants, adjusting for seasonality and weather variables. Before noon, the risk was associated with an interquartile range (IQR) (7.9 μg/m(3)) increase in PM10 at lag 2-4 days below the median (RR = 1...
November 17, 2017: International Journal of Environmental Health Research
https://www.readbyqxmd.com/read/29149743/multigenerational-effects-of-salinity-in-six-clonal-lineages-of-daphnia-longispina
#4
C Venâncio, R Ribeiro, A M V M Soares, I Lopes
Sea level rise, as a consequence of climate changes, is already causing seawater intrusion in some freshwater coastal ecosystems worldwide. The increase in salinity at these freshwater coastal ecosystems may occur gradually (through groundwater) or abruptly (through extreme weather events). Moreover, many of them are also being altered and threatened by anthropogenic activities. Accordingly, the present study aimed at assessing the multigenerational lethal and sublethal effects caused by increased salinity in six clonal lineages of the freshwater cladoceran Daphnia longispina differing in their sensitivity to lethal levels of copper...
November 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29149298/vector-borne-diseases-and-climate-change-a-european-perspective
#5
Jan C Semenza, Jonathan E Suk
Climate change has already impacted the transmission of a wide-range of vector-borne diseases in Europe, and it will continue to do so in the coming decades. Climate change has been implicated in the observed shift of ticks to elevated altitudes and latitudes, notably including the Ixodes ricinus tick species which is a vector for Lyme borreliosis and tick-borne encephalitis. Climate change is also thought to have been a factor in the expansion of other important disease vectors in Europe: Aedes albopictus (the Asian tiger mosquito), which transmits diseases such as Zika, dengue, and chikungunya, and Phlebotomus sandfly species, which transmits diseases including Leishmaniasis...
November 15, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29149208/synergistic-effects-of-the-components-of-global-change-increased-vegetation-dynamics-in-open-forest-steppe-grasslands-driven-by-wildfires-and-year-to-year-precipitation-differences
#6
Miklós Kertész, Réka Aszalós, Attila Lengyel, Gábor Ónodi
Climate change and land use change are two major elements of human-induced global environmental change. In temperate grasslands and woodlands, increasing frequency of extreme weather events like droughts and increasing severity of wildfires has altered the structure and dynamics of vegetation. In this paper, we studied the impact of wildfires and the year-to-year differences in precipitation on species composition changes in semi-arid grasslands of a forest-steppe complex ecosystem which has been partially disturbed by wildfires...
2017: PloS One
https://www.readbyqxmd.com/read/29148655/feframing-climate-change-for-environmental-health
#7
Caitlin Weems, Prithwi Raj Subramaniam
Repeated warnings by the scientific community on the dire consequences of climate change through global warming to the ecology and sustenance of our planet have not been give appropriate attention by the U.S. public. Research has shown that climate change is responsible for catastrophic weather occurrences--such as floods, tornadoes, hurricanes, and heat waves--resulting in environmental and public health issues. The purpose of this report is to examine factors influencing public views on climate change. Theoretical and political perspectives are examined to unpack opinions held by the public in the U...
April 2017: Journal of Environmental Health
https://www.readbyqxmd.com/read/29148615/farmers-perspective-on-herbicide-resistant-weeds-and-application-of-resistance-management-strategies-results-from-a-german-survey
#8
Lena Ulber, Dagmar Rissel
BACKGROUND: A herbicide resistance survey was conducted in Germany to determine farmers' awareness of herbicide resistance and experience with resistant weeds, the used information sources on herbicide resistance and methods employed to confirm resistance. In addition, the application pattern and perception of resistance management strategies by farmers were assessed. RESULTS: The majority of farmers (88%) was aware of the presence of herbicide resistance cases in Germany and 64% and 50% of farmers reported that resistant weeds were detected in their county or on their farm, respectively...
November 17, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29148020/effect-of-different-types-of-disinfection-solution-and-aging-on-the-hardness-and-colour-stability-of-maxillofacial-silicone-elastomers
#9
Pinar Cevik, Arzu Z Yildirim-Bicer
INTRODUCTION: Understanding the effect of aging and different disinfecting agents on the physical properties of pigmented maxillofacial silicones may help eliminate the current uncertainty as to the best follow-up suggestions for the patients treated with silicone prostheses. METHODS: One hundred fifty specimens (14 × 2 mm) were evaluated for colour and 75 specimens (30 × 10 mm) for hardness (total, 225 specimens). Five specimens were used for hardness testing in each disinfecting solution while 10 silicone specimens were used for colour evaluation...
November 9, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/29147456/prevalence-of-sun-protection-at-outdoor-recreation-and-leisure-venues-at-resorts-in-north-america
#10
Barbara J Walkosz, Michael D Scott, David B Buller, Peter A Andersen, Larry Beck, Gary R Cutter
Background: Exposure to solar ultra violet radiation (UVR) is a primary risk factor for skin cancer. Vacationers often fail to protect themselves from harmful UVR. Purpose: The study assessed the sun protection practices of resort guests in various outdoor leisure and recreation venues during warm-weather seasons. Method: 41 North American resorts were enrolled in a quasi-experimental randomized controlled trial. Adult guests were observed (n=4091) and surveyed (n=3694) in a cross sectional sample...
2017: American Journal of Health Education
https://www.readbyqxmd.com/read/29147121/ambient-air-pollution-and-daily-hospital-admissions-for-cardiovascular-diseases-in-arak-iran
#11
Mostafa Vahedian, Narges Khanjani, Moghaddameh Mirzaee, Ali Koolivand
BACKGROUND: Outdoor air pollution has been considered as one of the most serious health concerns over the last decade. This study aimed to investigate the association between ambient air pollution and cardiovascular hospital admissions. METHODS: This investigation was carried out from January 1, 2010 to December 31, 2015, in the urban population of Arak, Iran. Daily records of concentrations of air pollutants including particulate matter less than 10 µm (PM10), nitrogen dioxide (NO2), particulate matter less than 2...
May 2017: ARYA Atherosclerosis
https://www.readbyqxmd.com/read/29146785/-david-and-goliath-weather-eyes-set-for-launch
#12
Eric Hand
No abstract text is available yet for this article.
November 17, 2017: Science
https://www.readbyqxmd.com/read/29146008/heat-and-pregnancy-related-emergencies-risk-of-placental-abruption-during-hot-weather
#13
Siyi He, Tom Kosatsky, Audrey Smargiassi, Marianne Bilodeau-Bertrand, Nathalie Auger
INTRODUCTION: Outdoor heat increases the risk of preterm birth and stillbirth, but the association with placental abruption has not been studied. Placental abruption is a medical emergency associated with major morbidity and mortality in pregnancy. We determined the relationship between ambient temperature and risk of placental abruption in warm seasons. MATERIAL AND METHODS: We performed a case-crossover analysis of 17,172 women whose pregnancies were complicated by placental abruption in Quebec, Canada from May to October 1989-2012...
November 13, 2017: Environment International
https://www.readbyqxmd.com/read/29145728/understanding-how-emergency-medicine-physicians-survive-and-thrive-in-rural-practice-a-theoretical-model
#14
Ashra Kolhatkar, Andrea Keesey, Bob Bluman, Brenna Lynn, Tandi Wilkinson
INTRODUCTION: The challenges facing emergency medicine (EM) services in Canada reflect the limitations of the entire healthcare system. The emergency department (ED) is uniquely situated in the healthcare system such that shortcomings in hospital- and community-based services are often first revealed there. This is especially true in rural settings, where there are additional site-specific barriers to the provision of EM care. Existing studies look at the factors that influence rural EM physicians in isolation...
November 2017: Rural and Remote Health
https://www.readbyqxmd.com/read/29145595/synchrony-weather-and-cycles-in-southern-pine-beetle-coleoptera-curculionidae
#15
John D Reeve
Spatial synchrony and cycles are common features of forest insect pests, but are often studied as separate phenomenon. Using time series of timber damage caused by Dendroctonus frontalis Zimmermann (Coleoptera: Curculionidae) (southern pine beetle) in 10 states within the southern United States, this study examines synchrony in D. frontalis abundance, the synchronizing effects of temperature extremes, and the evidence for shared cycles among state populations. Cross-correlation and cluster analyses are used to quantify synchrony across a range of geographic distances and to identify groups of states with synchronous dynamics...
November 14, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/29145446/large-scale-climatic-effects-on-traditional-hawaiian-fishpond-aquaculture
#16
Daniel McCoy, Margaret A McManus, Keliʻiahonui Kotubetey, Angela Hiʻilei Kawelo, Charles Young, Brandon D'Andrea, Kathleen C Ruttenberg, Rosanna ʻAnolani Alegado
Aquaculture accounts for almost one-half of global fish consumption. Understanding the regional impact of climate fluctuations on aquaculture production thus is critical for the sustainability of this crucial food resource. The objective of this work was to understand the role of climate fluctuations and climate change in subtropical coastal estuarine environments within the context of aquaculture practices in He'eia Fishpond, O'ahu Island, Hawai'i. To the best of our knowledge, this was the first study of climate effects on traditional aquaculture systems in the Hawaiian Islands...
2017: PloS One
https://www.readbyqxmd.com/read/29145132/effect-of-evaporative-weathering-and-oil-sediment-interactions-on-the-fate-and-behavior-of-diluted-bitumen-in-marine-environments-part-1-spill-related-properties-oil-buoyancy-and-oil-particulate-aggregates-characterization
#17
Yujuan Hua, Fatemeh S Mirnaghi, Zeyu Yang, Bruce P Hollebone, Carl E Brown
The fate and behavior of diluted bitumen spilled in marine conditions has recently become a topic of much interest, yet, only limited knowledge is available. One of the major issues of a diluted bitumen spill on water is whether the product will sink, especially when suspended sediment is present in the water column. This study demonstrated how weathering processes influenced the key spill-related properties of a diluted bitumen product (Cold Lake Blend-Winter), and how interaction of diluted bitumen with sediment affected its tendency to float or sink in water...
October 28, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145057/bioerosive-and-bioprotective-role-of-barnacles-on-rocky-shores
#18
Marta Pappalardo, Elena Maggi, Chiara Geppini, Federica Pannacciulli
Bioerosion and bioprotection (bio-remodeling) is the action exerted by biota colonizing rocky shores. It represents an important component among processes responsible for shaping coastal landforms, and a clear evidence of interaction between the biosphere and the solid earth. Barnacles extensively colonize the midlittoral belt of rocky shores in the Mediterranean Basin. Previous research, mostly based on laboratory evidence, suggests that barnacles are bioprotectors, in that they protect the rock surface from different types of physical and chemical weathering...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29145052/a-comparison-of-personal-exposure-to-air-pollutants-in-different-travel-modes-on-national-highways-in-india
#19
Soma Sekhara Rao Kolluru, Aditya Kumar Patra, Satya Prakash Sahu
People often travel a long distance on highways to the nearest city for professional/business activities. However, relatively few publications on passenger exposure to pollutants on highways in India or elsewhere are available. The aim of this study was to examine the contribution of different travel modes to passengers' pollutant exposure for a long distance travel on a national highway in India. We measured PM2.5 and CO exposure levels of the passengers over 200km on a national highway using two portable air monitors, EVM-7 and EPAM-5000...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29144407/the-effects-of-various-weather-conditions-as-a-potential-ischemic-stroke-trigger-in-dogs
#20
Kristy L Meadows, Gena M Silver
Stroke is the fifth leading cause of death in the United States, and is the leading cause of serious, long-term disability worldwide. There are at least 795,000 new or recurrent strokes each year, and approximately 85% of all stroke occurrences are ischemic. Unfortunately, companion animals are also at risk for ischemic stroke. Although the exact incidence of ischemic stroke in companion animals is unknown, some studies, and the veterinary information network (VIN), report that approximately 3% of neurological case referrals are due to a stroke...
November 16, 2017: Veterinary Sciences
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