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https://www.readbyqxmd.com/read/28647795/investigation-of-chlorella-vulgaris-utex-265-cultivation-under-light-and-low-temperature-stressed-conditions-for-lutein-production-in-flasks-and-the-coiled-tree-photo-bioreactor-ctpbr
#1
Mengyue Gong, Amarjeet Bassi
Lutein has an increasing share in the pharmaceutical and nutraceutical market due to its benefits to eye health. Microalgae may be a potential source for lutein production while the expense limits the commercialization. In this study, a coiled tubular tree photobioreactor (CTPBR) design was investigated for cultivating the cold tolerant microalgae Chlorella vulgaris UTEX 265 under various conditions for lutein production. The influence and interaction of light irradiance strength, lighting cycle, and temperature on microalgae and lutein production efficiency at low temperature range were also studied in flasks via response surface method (RSM)...
June 24, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28647513/respiratory-syncytial-virus-bronchiolitis-weather-conditions-and-air-pollution-in-an-italian-urban-area-an-observational-study
#2
Raffaella Nenna, Melania Evangelisti, Antonella Frassanito, Carolina Scagnolari, Alessandra Pierangeli, Guido Antonelli, Ambra Nicolai, Serena Arima, Corrado Moretti, Paola Papoff, Maria Pia Villa, Fabio Midulla
BACKGROUND: In this study we sought to evaluate the association between viral bronchiolitis, weather conditions, and air pollution in an urban area in Italy. METHODS: We included infants hospitalized for acute bronchiolitis from 2004 to 2014. All infants underwent a nasal washing for virus detection. A regional agency network collected meteorological data (mean temperature, relative humidity and wind velocity) and the following air pollutants: sulfur dioxide, nitrogen oxide, carbon monoxide, ozone, benzene and suspended particulate matter measuring less than 10µm (PM10) and less than 2...
June 22, 2017: Environmental Research
https://www.readbyqxmd.com/read/28647296/multiple-stressors-including-contaminant-exposure-and-parasite-infection-predict-spleen-mass-and-energy-expenditure-in-breeding-ring-billed-gulls
#3
Sarah C Marteinson, David J Marcogliese, Jonathan Verreault
Daily energy expenditure (DEE) in animals is influenced by many factors although the impact of stressors remains largely unknown. The objective of this study was to determine how multiple physiological stressors (parasite infection and contaminant exposure) and natural challenges (energy-demanding activities and weather conditions) may affect DEE in nesting ring-billed gulls (Larus delawarensis) exposed to high concentrations of persistent organic contaminants (POPs). Physical activity, temperature, gastrointestinal parasitic worm abundance, relative spleen mass, plasma thyroid hormone levels and liver concentrations of POPs were determined; field metabolic rate (FMR) was used as a measure of DEE...
June 21, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/28647250/constructed-wetlands-for-wastewater-treatment-in-cold-climate-a-review
#4
REVIEW
Mo Wang, Dong Qing Zhang, Jian Wen Dong, Soon Keat Tan
Constructed wetlands (CWs) have been successfully used for treating various wastewaters for decades and have been identified as a sustainable wastewater management option worldwide. However, the application of CW for wastewater treatment in frigid climate presents special challenges. Wetland treatment of wastewater relies largely on biological processes, and reliable treatment is often a function of climate conditions. To date, the rate of adoption of wetland technology for wastewater treatment in cold regions has been slow and there are relatively few published reports on CW applications in cold climate...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647234/local-pm10-and-pm2-5-emission-inventories-from-agricultural-tillage-and-harvest-in-northeastern-china
#5
Weiwei Chen, Daniel Q Tong, Shichun Zhang, Xuelei Zhang, Hongmei Zhao
Mineral particles or particulate matters (PMs) emitted during agricultural activities are major recurring sources of atmospheric aerosol loading. However, precise PM inventory from agricultural tillage and harvest in agricultural regions is challenged by infrequent local emission factor (EF) measurements. To understand PM emissions from these practices in northeastern China, we measured EFs of PM10 and PM2.5 from three field operations (i.e., tilling, planting and harvesting) in major crop production (i.e., corn and soybean), using portable real-time PM analyzers and weather station data...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28646965/cholera-management-and-prevention
#6
Hannah G Davies, Conor Bowman, Stephen P Luby
Cholera is an acute secretory diarrhoeal infection caused by the bacterium Vibrio cholerae. It is likely to have originated in the Indian sub-continent; however, it spread to cause six worldwide pandemics between 1817-1923. The ongoing seventh worldwide pandemic of cholera began in 1961. The intensity, duration and severity of cholera epidemics have been increasing, signaling the need for more effective control and prevention measures. The response to the cholera pandemics of the 19th century led to the development of safe and effective sanitation and water systems which have effectively removed the risk of cholera in many settings...
June 2017: Journal of Infection
https://www.readbyqxmd.com/read/28646625/fluctuating-effects-of-genetic-and-plastic-changes-in-body-mass-on-population-dynamics-in-a-large-herbivore
#7
Gabriel Pigeon, Thomas H G Ezard, Marco Festa-Bianchet, David W Coltman, Fanie Pelletier
Recent studies suggest that evolutionary changes can occur on a contemporary time scale. Hence, evolution can influence ecology and vice-versa. To understand the importance of eco-evolutionary dynamics in population dynamics, we must quantify the relative contribution of ecological and evolutionary changes to population growth and other ecological processes. To date, however, most eco-evolutionary dynamics studies have not partitioned the relative contribution of plastic and evolutionary changes in traits on population, community and ecosystem processes...
June 24, 2017: Ecology
https://www.readbyqxmd.com/read/28646228/coronal-mass-ejections-are-not-coherent-magnetohydrodynamic-structures
#8
M J Owens, M Lockwood, L A Barnard
Coronal mass ejections (CMEs) are episodic eruptions of solar plasma and magnetic flux that travel out through the solar system, driving extreme space weather. Interpretation of CME observations and their interaction with the solar wind typically assumes CMEs are coherent, almost solid-like objects. We show that supersonic radial propagation of CMEs away from the Sun results in geometric expansion of CME plasma parcels at a speed faster than the local wave speed. Thus information cannot propagate across the CME...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28645920/common-garden-test-of-range-limits-as-predicted-by-a-species-distribution-model-in-the-annual-plant-mimulus-bicolor
#9
Andrea L Dixon, Jeremiah W Busch
PREMISE OF THE STUDY: Direct tests of a species distribution model (SDM) were used to evaluate the hypothesis that the northern and southern edges of Mimulus bicolor's geographical range are limited by temperature and precipitation. METHODS: Climatic suitability was predicted using an SDM informed only by temperature and precipitation variables. These predictions were tested by growing plants in growth chambers with temperature and watering treatments informed by weather stations characteristic of environments at the geographic center, edges, and outside the range...
June 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28645762/calculating-in-situ-degradation-rates-of-hydrocarbon-compounds-in-deep-waters-of-the-gulf-of-mexico
#10
Anne E Thessen, Elizabeth W North
Biodegradation is an important process for hydrocarbon weathering that influences its fate and transport, yet little is known about in situ biodegradation rates of specific hydrocarbon compounds in the deep ocean. Using data collected in the Gulf of Mexico below 700m during and after the Deepwater Horizon oil spill, we calculated first-order degradation rate constants for 49 hydrocarbons and inferred degradation rate constants for an additional 5 data-deficient hydrocarbons. Resulting calculated (not inferred) half-lives of the hydrocarbons ranged from 0...
June 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28645048/phytolith-carbon-sequestration-in-global-terrestrial-biomes
#11
Zhaoliang Song, Hongyan Liu, Caroline A E Strömberg, Xiaomin Yang, Xiaodong Zhang
Terrestrial biogeochemical carbon (C) sequestration is coupled with the biogeochemical silicon (Si) cycle through mechanisms such as phytolith C sequestration, but the size and distribution of the phytolith C sink remain unclear. Here, we estimate phytolith C sequestration in global terrestrial biomes. We used biome data including productivity, phytolith and silica contents, and the phytolith stability factor to preliminarily determine the size and distribution of the phytolith C sink in global terrestrial biomes...
June 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28644983/future-heat-waves-due-to-climate-change-threaten-the-survival-of-p-%C3%A2-oceanica-seedlings
#12
Laura Guerrero-Meseguer, Arnaldo Marín, Carlos Sanz-Lázaro
Extreme weather events are major drivers of ecological change, and their occurrence is likely to increase due to climate change. The transient increases in atmospheric temperatures are leading to a greater occurrence of heat waves, extreme events that can produce a substantial warming of water, especially in enclosed basins such as the Mediterranean Sea. Here, we tested the effects of current and predicted heat waves on the early stages of development of the seagrass Posidonia oceanica. Temperatures above 27 °C limited the growth of the plant by inhibiting its photosynthetic system...
June 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28644770/the-impact-of-photovoltaic-pv-installations-on-downwind-particulate-matter-concentrations-results-from-field-observations-at-a-550-mwac-utility-scale-pv-plant
#13
Dwarakanath Ravikumar, Parikhit Sinha
With utility-scale photovoltaic(PV) projects increasingly developed in dry and dust-prone geographies with high solar insolation, there is a critical need to analyze the impacts of PV installations on the resulting particulate-matter(PM) concentrations which have environmental and health impacts. This study is the first to quantify the impact of a utility-scale PV plant on PM concentrations downwind of the project site. Background, construction and post-construction PM2.5 and PM10 concentration data are collected from four beta attenuation monitor(BAM) stations over 3 years...
June 23, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28644584/autumn-weather-and-winter-increase-in-cerebrovascular-disease-mortality
#14
R McDonagh, J Harbison
Mortality from cerebrovascular disease increases in winter but the cause is unclear. Ireland's oceanic climate means that it infrequently experiences extremes of weather. We examined how weather patterns relate to stroke mortality in Ireland. Seasonal data for Sunshine (% of average), Rainfall (% of average) and Temperature (degrees Celsius above average) were collected for autumn (September-November) and winter (December-February) using official Irish Meteorological Office data. National cerebrovascular mortality data was obtained from Quarterly Vital Statistics...
December 12, 2016: Irish Medical Journal
https://www.readbyqxmd.com/read/28644577/evidence-of-fuels-management-and-fire-weather-influencing-fire-severity-in-an-extreme-fire-event
#15
Jamie M Lydersen, Brandon M Collins, Matthew L Brooks, John R Matchett, Kristen L Shive, Nicholas A Povak, Van R Kane, Douglas F Smith
Following changes in vegetation structure and pattern, along with a changing climate, large wildfire incidence has increased in forests throughout the western U.S. Given this increase there is great interest in whether fuels treatments and previous wildfire can alter fire severity patterns in large wildfires. We assessed the relative influence of previous fuels treatments (including wildfire), fire weather, vegetation and water balance on fire severity in the Rim Fire of 2013. We did this at three different spatial scales to investigate whether the influences on fire severity changed across scales...
June 23, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28641683/a-review-of-general-aviation-safety-1984-2017
#16
Douglas D Boyd
General aviation includes all civilian aviation apart from operations involving paid passenger transport. Unfortunately, this category of aviation holds a lackluster safety record, accounting for 94% of civil aviation fatalities. In 2014, of 1143 general aviation accidents, 20% were fatal compared with 0 of 29 airline mishaps in the United States. Herein, research findings over the past 30 yr will be reviewed. Accident risk factors (e.g., adverse weather, geographical region, post-impact fire, gender differences) will be discussed...
July 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28640342/applicability-of-geomechanical-classifications-for-estimation-of-strength-properties-in-brazilian-rock-masses
#17
Tatiana B Santos, Milene S Lana, Allan E M Santos, Larissa R C Silveira
Many authors have been proposed several correlation equations between geomechanical classifications and strength parameters. However, these correlation equations have been based in rock masses with different characteristics when compared to Brazilian rock masses. This paper aims to study the applicability of the geomechanical classifications to obtain strength parameters of three Brazilian rock masses. Four classification systems have been used; the Rock Mass Rating (RMR), the Rock Mass Quality (Q), the Geological Strength Index (GSI) and the Rock Mass Index (RMi)...
April 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28638923/-reconstitution-of-large-conductance-calcium-activated-potassium-channels-into-artificial-planar-lipid-bilayers
#18
Jun Cheng, Xiao-Rong Zeng, Xiao-Qiu Tan, Peng-Yun Li, Jing Wen, Liang Mao, Yan Yang
This study was aimed to establish a method to create a stable planar lipid bilayer membranes (PLBMs), in which large conductance calcium-activated potassium channels (BKCa) were reconstituted. Using spreading method, PLBMs were prepared by decane lipid fluid consisting of N2-weathered mixture of phosphatidylcholine and cholesterol at 3:1 ratio. After successful incorporation of BKCa channel into PLBMs, single channel characteristics of BKCa were studied by patch clamp method. The results showed that i) the single channel conductance of BKCa was (206...
June 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28638686/rheumatoid-arthritis-are-psychological-factors-effective-in-disease-flare
#19
Volkan Yılmaz, Ebru Umay, İbrahim Gündoğdu, Zeliha Özgür Karaahmet, Arif Erhan Öztürk
OBJECTIVE: Rheumatoid arthritis (RA) is clinically an undulant disease, and reasons for flare or remission vary. We aimed to identify factors potentially associated with disease flare and remission. MATERIAL AND METHODS: Two hundred and seventy-four patients with RA who were admitted to our center between January 2010 and January 2016 were included. Disease activity was evaluated using disease activity score 28 (DAS 28); functional status was evaluated using the modified Health Assessment Questionnaire (m-HAQ), a questionnaire that comprises flare or remission domains such as psychological stress and mood status, physical trauma, nutrition regimen, infection, antibiotic use, and seasonal weather changes...
June 2017: European Journal of Rheumatology
https://www.readbyqxmd.com/read/28638074/geochemical-constraints-on-the-hadean-environment-from-mineral-fingerprints-of-prokaryotes
#20
Alexey A Novoselov, Dailto Silva, Jerusa Schneider, Ximena Celeste Abrevaya, Michael S Chaffin, Paloma Serrano, Margareth Sugano Navarro, Maria Josiane Conti, Carlos Roberto de Souza Filho
The environmental conditions on the Earth before 4 billion years ago are highly uncertain, largely because of the lack of a substantial rock record from this period. During this time interval, known as the Hadean, the young planet transformed from an uninhabited world to the one capable of supporting, and inhabited by the first living cells. These cells formed in a fluid environment they could not at first control, with homeostatic mechanisms developing only later. It is therefore possible that present-day organisms retain some record of the primordial fluid in which the first cells formed...
June 21, 2017: Scientific Reports
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