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https://www.readbyqxmd.com/read/28324829/interactive-effects-of-an-insecticide-and-a-fungicide-on-different-organism-groups-and-ecosystem-functioning-in-a-stream-detrital-food-web
#1
Mohab Dawoud, Mirco Bundschuh, Willem Goedkoop, Brendan G McKie
Freshwater ecosystems are often affected by cocktails of multiple pesticides targeting different organism groups. Prediction and evaluation of the ecosystem-level effects of these mixtures is complicated by the potential not only for interactions among the pesticides themselves, but also for the pesticides to alter biotic interactions across trophic levels. In a stream microcosm experiment, we investigated the effects of two pesticides targeting two organism groups (the insecticide lindane and fungicide azoxystrobin) on the functioning of a model stream detrital food web consisting of a detritivore (Ispoda: Asellus aquaticus) and microbes (an assemblage of fungal hyphomycetes) consuming leaf litter...
March 9, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28323638/fast-lesion-mapping-during-hifu-treatment-using-harmonic-motion-imaging-guided-focused-ultrasound-hmigfus-in-vitro-and-in-vivo
#2
Yang Han, Shutao Wang, Thomas Payen, Elisa Konofagou
The successful clinical application of high intensity focused ultrasound (HIFU) ablation depends on reliable monitoring of the lesion formation. Harmonic motion imaging guided focused ultrasound (HMIgFUS) is an ultrasound-based elasticity imaging technique, which monitors HIFU ablation based on the stiffness change of the tissue instead of the echo intensity change in conventional B-mode monitoring, rendering it potentially more sensitive to lesion development. Our group has shown that predicting the lesion location based on the radiation force-excited region is feasible during HMIgFUS...
March 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28318379/prevalence-and-distribution-of-pseudogymnoascus-destructans-in-michigan-bats-submitted-for-rabies-surveillance
#3
Samantha L Darling, Ailam Lim, Julie R Melotti, Daniel J O'Brien, Steven R Bolin
Since 2006, bat populations in North America have suffered devastating mortality from an emerging disease known as white-nose syndrome (WNS). The causal agent of WNS is the fungus Pseudogymnoascus destructans. In April 2014, WNS was discovered in little brown bats ( Myotis lucifugus ) in Michigan, and has since been documented in 12 counties. Because current surveillance for WNS focuses primarily on mine-hibernating species in winter, it is subject geographic, species, and seasonal bias. To investigate species affected and potential associations of gender, seasonal life cycle, and region with P...
March 20, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28317706/impact-of-processing-on-odour-active-compounds-of-a-mixed-tomato-onion-puree
#4
Maria Koutidou, Tara Grauwet, Ann Van Loey, Parag Acharya
Gas chromatography-olfactometry revealed thirty-two odour-active compounds in a heat-processed tomato-onion puree, among which twenty-seven were identified by gas chromatography-olfactometry-mass spectrometry (GC-O-MS) and comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC×GC-TOF MS). Based on the results of two olfactometric methods, i.e. detection frequency and aroma extract dilution analysis, the most potent aroma components include: dipropyl disulfide, S-propyl thioacetate, dimethyl trisulfide, 1-octen-3-one, methional, dipropyl trisulfide, 4,5-dimethylthiazole, 2-phenylacetaldehyde and sotolone...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28316123/the-msc-adhesion-cascade-insights-into-homing-and-transendothelial-migration
#5
Franziska Nitzsche, Claudia Müller, Barbara Lukomska, Jukka Jolkkonen, Alexander Deten, Johannes Boltze
Mesenchymal stem cells (MSC) are promising candidates for adult cell therapies in regenerative medicine. To fully exert their potential, efficient homing and migration towards lesion sites plays an important role. Local transplantation deposits MSC in spatial proximity to the lesion, but often requires invasive procedures. Systemic administration routes are favored, but require the targeted extravasation of the circulating MSC at the site of injury. Transplanted MSC can indeed leave the blood flow and transmigrate through the endothelial barrier, and reach the lesion site...
March 18, 2017: Stem Cells
https://www.readbyqxmd.com/read/28303113/neurophysiological-correlates-of-visual-dominance-a-lateralized-readiness-potential-investigation
#6
You Li, Mingxin Liu, Wei Zhang, Sai Huang, Bao Zhang, Xingzhou Liu, Qi Chen
When multisensory information concurrently arrives at our receptors, visual information often receives preferential processing and eventually dominates awareness and behavior. Previous research suggested that the visual dominance effect implicated the prioritizing of visual information into the motor system. In order to further reveal the underpinning neurophysiological mechanism of how visual information is prioritized into the motor system when vision dominates audition, the present study examined the time course of a particular motor activation ERP component, the lateralized readiness potential (LRP), during multisensory competition...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28300940/distribution-and-abundance-of-freshwater-decapods-in-an-atlantic-rainforest-catchment-with-a-dammed-future
#7
E F Silva-Junior, M Silva-Araújo, T P Moulton
Variations in physical characteristics along the course of a river influence habitat availability which reflects in species distribution. Knowledge of ecology and diversity of lotic species is important for evaluating how river ecosystems will respond to environmental impacts. Freshwater decapods are a group of high ecological and economic importance, but the knowledge about factors influencing their distribution is scarce in Brazil. We performed a survey of decapods to describe their abundance and distribution as well as to study their relationships with stream physical variables and especially their association with different substrates types...
March 13, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28297055/any-use-for-alternative-lock-solutions-in-the-prevention-of-catheter-related-blood-stream-infections
#8
Laura Labriola, Jean-Michel Pochet
The prevention of catheter-related blood stream infections (CRBSI) in hemodialysis (HD) patients remains a challenge because of high morbidity and mortality associated to CRBSI. Alternative locking solutions (ALS) containing an antithrombotic substance with additional antimicrobial or antibiofilm properties (citrate, ethylenediaminetetraacetic acid [EDTA], 70% ethanol, thrombolytics) with or without the addition of molecules with specific antimicrobial activity (antibiotics, taurolidine, paraben-methylene-blue) has been proposed with the aim to prevent or eradicate intraluminal biofilm colonization and subsequent CRBSI...
March 6, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28295947/effects-of-increased-flooding-on-riparian-vegetation-field-experiments-simulating-climate-change-along-five-european-lowland-streams
#9
Annemarie G Garssen, Annette Baattrup-Pedersen, Tenna Riis, Bart M Raven, Carl Christian Hoffman, Jos T A Verhoeven, Merel B Soons
In many parts of the world, the magnitude and frequency of cold-season precipitation are expected to increase in the near future. This will result in an increased magnitude and duration of winter and spring flooding by rain-fed streams and rivers. Such climate-driven increases in flooding are likely to affect riparian plant communities, but future vegetation changes are hard to predict due to current lack of data. To fill this knowledge gap, we experimentally modified the hydrology of five streams across three countries in North-Western Europe during late winter/early spring over a period of three years...
March 13, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28289770/pyrolysis-oil-biorefinery
#10
Dietrich Meier
In biorefineries several conversion processes for biomasses may be applied to obtain maximum value from the feed materials. One viable option is the liquefaction of lignocellulosic feedstocks or residues by fast pyrolysis. The conversion technology requires rapid heating of the biomass particles along with rapid cooling of the hot vapors and aerosols. The main product, bio-oil, is obtained in yields of up to 75 wt% on a dry feed basis, together with by-product char and gas which are used within the process to provide the process heat requirements; there are no waste streams other than flue gas and ash...
March 14, 2017: Advances in Biochemical Engineering/biotechnology
https://www.readbyqxmd.com/read/28287533/isolation-of-endothelial-progenitor-cells-from-healthy-volunteers-and-their-migratory-potential-influenced-by-serum-samples-after-cardiac-surgery
#11
Christoph Emontzpohl, David Simons, Sandra Kraemer, Andreas Goetzenich, Gernot Marx, Jürgen Bernhagen, Christian Stoppe
Endothelial progenitor cells (EPCs) are recruited from the bone marrow under pathological conditions like hypoxia and are crucially involved in the neovascularization of ischemic tissues. The origin, classification and characterization of EPCs are complex; notwithstanding, two prominent sub-types of EPCs have been established: so-called "early" EPCs (subsequently referred to as early-EPCs) and late-outgrowth EPCs (late-EPCs). They can be classified by biological properties as well as by their appearance during in vitro culture...
February 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28287247/trunk-neural-crest-cells-formation-migration-and-beyond
#12
Guillermo A Vega-Lopez, Santiago Cerrizuela, Manuel J Aybar
Neural crest cells (NCCs) are a multipotent, migratory cell population that generates an astonishingly diverse array of cell types during vertebrate development. The trunk neural crest has long been considered of particular significance. First, it has been held that the trunk neural crest has a morphogenetic role, acting to coordinate the development of the peripheral nervous system, secretory cells of the endocrine system and pigment cells of the skin. Second, the trunk neural crest additionally has skeletal potential...
2017: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/28285400/how-does-environmental-variation-affect-the-distribution-of-dragonfly-larvae-odonata-in-the-amazon-cerrado-transition-zone-in-central-brazil
#13
T P Mendes, A Luiza-Andrade, H S R Cabette, L Juen
This study investigated the effects of environmental variation on assemblages of dragonfly larvae (Odonata). We hypothesize that there is a significant correlation between species richness, species composition, and abundance of Odonata individuals, and habitat integrity and abiotic variables. To test this hypothesis, we sampled odonate larvae at 12 streams in the Suiá-Miçú River basin in Mato Grosso, Brazil, during three different periods of the year. Local physical and chemical variables (temperature, pH, turbidity, electrical conductivity (EC), dissolved oxygen (DO), total dissolved solids (TDS), and oxidation reduction potential (ORP)) were measured at each site using a multi-parameter probe, and integrity was assessed using the Habitat Integrity Index (HII)...
March 11, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28285374/antibiotic-mixture-effects-on-growth-of-the-leaf-shredding-stream-detritivore-gammarus-fossarum
#14
Mirco Bundschuh, Torsten Hahn, Mark O Gessner, Ralf Schulz
Pharmaceuticals contribute greatly to human and animal health. Given their specific biological targets, pharmaceuticals pose a significant environmental risk by affecting organisms and ecosystem processes, including leaf-litter decomposition. Although litter decomposition is a central process in forest streams, the consequences of exposure to pharmaceuticals remain poorly known. The present study assessed the impact of antibiotics as an important class of pharmaceuticals on the growth of the leaf-shredding amphipod Gammarus fossarum over 24 days...
March 11, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28284090/ancient-dissolved-methane-in-inland-waters-revealed-by-a-new-collection-method-at-low-field-concentrations-for-radiocarbon-14-c-analysis
#15
Joshua F Dean, Michael F Billett, Callum Murray, Mark H Garnett
Methane (CH4) is a powerful greenhouse gas that plays a prominent role in the terrestrial carbon (C) cycle, and is released to the atmosphere from freshwater systems in numerous biomes globally. Radiocarbon ((14)C) analysis can indicate both the age and source of CH4 in natural environments. In contrast to CH4 present in bubbles released from aquatic sediments (ebullition), dissolved CH4 in lakes and streams can be present in low concentrations compared to carbon dioxide (CO2), and therefore obtaining sufficient aquatic CH4 for radiocarbon ((14)C) analysis remains a major technical challenge...
March 6, 2017: Water Research
https://www.readbyqxmd.com/read/28282786/galangin-potentiates-human-breast-cancer-to-apoptosis-induced-by-trail-through-activating-ampk
#16
Wei Song, Chong-Yang Yan, Qian-Qian Zhou, Lin-Lin Zhen
Breast cancer is reported as the most frequent tumor with limited treatments among the female worldwide. Galangin, a natural active compound 3, 5, 7-trihydroxyflavone, is a type of bioflavonoid isolated from the Alpinia galangal root and suggested to induce apoptosis in various cancers. Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is an effective anti-tumor agent for human breast cancer. Promoted expression of CHOP, a down-streaming transcription factor for endoplasmic reticulum stress (ER stress), enhanced death factor 4 (DR4) activity and accelerated reactive oxygen species (ROS) as well as cell death...
March 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28279583/a-quantitative-microbial-risk-assessment-model-for-total-coliforms-and-e-%C3%A2-coli-in-surface-runoff-following-application-of-biosolids-to-grassland
#17
Rachel Clarke, Dara Peyton, Mark G Healy, Owen Fenton, Enda Cummins
In Ireland, the land application of biosolids is the preferred option of disposing of municipal sewage waste. Biosolids provide nutrients in the form of nitrogen, phosphorus, potassium and increases organic matter. It is also an economic way for a country to dispose of its municipal waste. However, biosolids may potentially contain a wide range of pathogens, and following rainfall events, may be transported in surface runoff and pose a potential risk to human health. Thus, a quantitative risk assessment model was developed to estimate potential pathogens in surface water and the environmental fate of the pathogens following dilution, residence time in a stream, die-off rate, drinking water treatment and human exposure...
March 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28278774/sustainability-of-cement-kiln-co-processing-of-wastes-in-india-a-pilot-study
#18
Rahul Baidya, Sadhan Kumar Ghosh, Ulhas V Parlikar
Co-processing in cement kiln achieves effective utilization of the material and energy value present in the wastes, thereby conserving the natural resources by reducing the use of virgin material. In India, a number of multifolded initiatives have been taken that take into account the potential and volume of waste generation. This paper studies the factors which might influence the sustainability of co-processing of waste in cement kilns as a business model, considering the issues and challenges in the supply chain framework in India in view of the four canonical pillars of sustainability...
February 28, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28278033/status-of-waste-tyres-and-management-practice-in-botswana
#19
Daniel Mmereki, Bontle Machola, Kentlafetse Mokokwe
Waste tyres (WTs) are becoming a significant environmental, economical and technological challenge due to their high contents of combustible composition and potential for valuable materials and energy resources. Fewer studies in developing and even developed countries have been carried out to assess the challenges regarding waste tyres management, and suggested the best alternative solutions for managing this waste stream. While developed countries made progress in waste tyres management needs by implementing more efficient innovative recovery and recycling methods, and restrictive regulations regarding the management of used tyres, in many developing countries the management of waste tyres has not received adequate interest, and the processing, treatment and disposal of waste tyre is still nascent...
February 22, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28277724/newcomer-adjustment-examining-the-role-of-managers-perception-of-newcomer-proactive-behavior-during-organizational-socialization
#20
Allison M Ellis, Sushil S Nifadkar, Talya N Bauer, Berrin Erdogan
Separate streams of organizational socialization research have recognized the importance of (a) newcomer proactivity and (b) manager support in facilitating newcomer adjustment. However, extant research has largely focused on the newcomers' experience, leaving the perspectives of managers during socialization relatively unexplored-a theoretical gap that has implications both for newcomer adjustment and manager-newcomer interactions that may serve as a basis for future relationship development. Drawing from the "interlocked" employee behavior argument of Weick (1979), we propose that managers' perception of newcomers' proactive behaviors are associated with concordant manager behaviors, which, in turn, support newcomer adjustment...
March 9, 2017: Journal of Applied Psychology
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