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https://www.readbyqxmd.com/read/27925281/effect-of-natural-organic-matter-on-the-photo-induced-toxicity-of-titanium-dioxide-tio2-nanoparticles
#1
Alexis M Wormington, Jason Coral, Matthew M Alloy, Carmen L Damare, Charles M Mansfield, Stephen J Klaine, Joseph H Bisesi, Aaron P Roberts
Nano-TiO2 is the most widely used form of nanoparticles in commercial industry, and come in two main configurations: rutile and anatase. Rutile TiO2 is used in UV screening applications, while anatase TiO2 crystals have a surface defect that makes them photoreactive. There are numerous reports in the literature of photo-induced toxicity to aquatic organisms following co-exposure to anatase nano-TiO2 and UV. All natural freshwater contains varying amounts of natural organic matter (NOM), which can drive UV attenuation and quench ROS in aquatic ecosystems...
December 7, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27925015/trends-in-freshwater-microcrustaceans-studies-in-brazil-between-1990-and-2014
#2
W M Silva, G Perbiche-Neves
This study presents a review of scientiometric data about freshwater microcrustaceans (Copepoda, Ostracoda, Branchiopoda: Cladocera, Anostraca, Notostraca and Conchostraca) in Brazil from 1990-2014. This review is based on 179 papers published across four databases, using the following keywords in the search: microcrustaceans, Copepoda, Cyclopoida, Calanoida, Harpacticoida, Ergasilidae, Daphniidae, Moinidae, Cladocera, Ostracoda, Conchostraca, zooplankton, reservoir, river, ponds, reservoirs, wetlands, caves, lakes, limnology, ecology, aquatic, taxonomy, systematics, morphology and biogeography...
December 1, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27924805/water-striders-adjust-leg-movement-speed-to-optimize-takeoff-velocity-for-their-morphology
#3
Eunjin Yang, Jae Hak Son, Sang-Im Lee, Piotr G Jablonski, Ho-Young Kim
Water striders are water-walking insects that can jump upwards from the water surface. Quick jumps allow striders to avoid sudden dangers such as predators' attacks, and therefore their jumping is expected to be shaped by natural selection for optimal performance. Related species with different morphological constraints could require different jumping mechanics to successfully avoid predation. Here we show that jumping striders tune their leg rotation speed to reach the maximum jumping speed that water surface allows...
December 7, 2016: Nature Communications
https://www.readbyqxmd.com/read/27924178/a-comparative-study-of-the-epidemiological-aspects-of-legionnaires-disease-outbreaks-in-korea-and-japan-2010-2014
#4
Bok-Soon Han, Myeong-Jin Lee, Young-Hwan Kwon, Won-Chang Lee
BACKGROUND: In the present study, we compared the epidemiological aspects of Legionnaire' disease (LD) outbreaks in Korea and Japan by analyzing the current state from 2010 to 2014. METHODS: The following factors were analyzed: nationwide cumulative incidence rate (CIR) per 100,000 populations and case-fatality rate in percentage, epidemiological aspects (i.e., case related to gender), male to female morbidity ratio (MFMR), age, seasonality and habitat distribution of LD cases...
January 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/27922828/a-new-method-of-estimation-of-dose-conversion-coefficients-for-aquatic-biota
#5
Yang Li, Jiangguo Li, Huijuan Wang, Aijun Wang
In order to develop the basis of an approach, through which we can comprehend the relationships of radiation exposures and dose, and dose and radiological effects, large numbers of dosimetric data are required. It is complex to estimate the dosimetry involved due to enormous variability of organism shapes, masses, and their natural habitats. This paper aims to develop an empirical equation, which correlates dose conversion coefficients (DCCs) with organism volume V, density ρ, source energy E and curve fitting coefficients...
December 6, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27921244/towards-green-oviposition-deterrents-effectiveness-of-syzygium-lanceolatum-myrtaceae-essential-oil-against-six-mosquito-vectors-and-impact-on-four-aquatic-biological-control-agents
#6
Giovanni Benelli, Mohan Rajeswary, Marimuthu Govindarajan
Essential oils (EOs) from plants may be alternative sources of molecules toxic against mosquito vectors of public health relevance. Most of researches in this field focused on EOs as larvicides or ovicides, while limited efforts focused on the exploitation of EOs as oviposition deterrents. In the present study, the larvicidal and oviposition deterrent activity of Syzygium lanceolatum leaf EO was evaluated against six mosquito species, Anopheles stephensi, An. subpictus, Aedes aegypti, Ae. albopictus, Culex quinquefasciatus, and Cx...
December 5, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27920386/does-eutrophication-driven-evolution-change-aquatic-ecosystems
#7
REVIEW
Timothy J Alexander, Pascal Vonlanthen, Ole Seehausen
Eutrophication increases primary production and changes the relative abundance, taxonomic composition and spatial distribution of primary producers within an aquatic ecosystem. The changes in composition and location of resources alter the distribution and flow of energy and biomass throughout the food web. Changes in productivity also alter the physico-chemical environment, which has further effects on the biota. Such ecological changes influence the direction and strength of natural and sexual selection experienced by populations...
January 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27920381/harvest-induced-evolution-insights-from-aquatic-and-terrestrial-systems
#8
REVIEW
Anna Kuparinen, Marco Festa-Bianchet
Commercial and recreational harvests create selection pressures for fitness-related phenotypic traits that are partly under genetic control. Consequently, harvesting can drive evolution in targeted traits. However, the quantification of harvest-induced evolutionary life history and phenotypic changes is challenging, because both density-dependent feedback and environmental changes may also affect these changes through phenotypic plasticity. Here, we synthesize current knowledge and uncertainties on six key points: (i) whether or not harvest-induced evolution is happening, (ii) whether or not it is beneficial, (iii) how it shapes biological systems, (iv) how it could be avoided, (v) its importance relative to other drivers of phenotypic changes, and (vi) whether or not it should be explicitly accounted for in management...
January 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27919757/dietary-administration-of-bacillus-subtilis-hainup40-enhances-growth-digestive-enzyme-activities-innate-immune-responses-and-disease-resistance-of-tilapia-oreochromis-niloticus
#9
Haitian Liu, Shifeng Wang, Yan Cai, Xiaohui Guo, Zhenjie Cao, Yongzheng Zhang, Shubin Liu, Wei Yuan, Weiwei Zhu, Yu Zheng, Zhenyu Xie, Weiliang Guo, Yongcan Zhou
The probiotic properties of Bacillus subtilis HAINUP40 isolated from the aquatic environment, and the effects of dietary administration of B. subtilis HAINUP40 on the growth performance, intestinal probiotic recovery, digestive enzyme activities, innate immunity and disease resistance of tilapia (Oreochromis niloticus) were evaluated. The probiotic properties investigated include tolerance to simulated gastrointestinal stress, auto-aggregation, cell surface hydrophobicity and extracellular enzyme production...
December 2, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27919541/pesticides-drive-risk-of-micropollutants-in-wastewater-impacted-streams-during-low-flow-conditions
#10
Nicole A Munz, Francis J Burdon, Dick de Zwart, Marion Junghans, Laura Melo, Marta Reyes, Urs Schönenberger, Heinz P Singer, Barbara Spycher, Juliane Hollender, Christian Stamm
Micropollutants enter surface waters through various pathways, of which wastewater treatment plants (WWTPs) are a major source. The large diversity of micropollutants and their many modes of toxic action pose a challenge for assessing environmental risks. In this study, we investigated the potential impact of WWTPs on receiving ecosystems by describing concentration patterns of micropollutants, predicting acute risks for aquatic organisms and validating these results with macroinvertebrate biomonitoring data...
November 3, 2016: Water Research
https://www.readbyqxmd.com/read/27919529/three-step-effluent-chlorination-increases-disinfection-efficiency-and-reduces-dbp-formation-and-toxicity
#11
Yu Li, Xiangru Zhang, Mengting Yang, Jiaqi Liu, Wanxin Li, Nigel J D Graham, Xiaoyan Li, Bo Yang
Chlorination is extensively applied for disinfecting sewage effluents, but it unintentionally generates disinfection byproducts (DBPs). Using seawater for toilet flushing introduces a high level of bromide into domestic sewage. Chlorination of sewage effluent rich in bromide causes the formation of brominated DBPs. The objectives of achieving a disinfection goal, reducing disinfectant consumption and operational costs, as well as diminishing adverse effects to aquatic organisms in receiving water body remain a challenge in sewage treatment...
December 2, 2016: Chemosphere
https://www.readbyqxmd.com/read/27919296/antimicrobial-resistance-in-salmonella-that-caused-foodborne-disease-outbreaks-united-states-2003-2012
#12
A C Brown, J E Grass, L C Richardson, A L Nisler, A S Bicknese, L H Gould
Although most non-typhoidal Salmonella illnesses are self-limiting, antimicrobial treatment is critical for invasive infections. To describe resistance in Salmonella that caused foodborne outbreaks in the United States, we linked outbreaks submitted to the Foodborne Disease Outbreak Surveillance System to isolate susceptibility data in the National Antimicrobial Resistance Monitoring System. Resistant outbreaks were defined as those linked to one or more isolates with resistance to at least one antimicrobial drug...
December 6, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/27918615/top-down-control-of-methane-emission-and-nitrogen-cycling-by-waterfowl
#13
R Scott Winton, Curtis J Richardson
Aquatic herbivores impose top-down control on the structure of wetland ecosystems, but the biogeochemical consequences of herbivory on methane (CH4 ) and nitrogen (N) are poorly known. To investigate the top-down effects of waterfowl on wetland biogeochemistry, we implemented exclosure experiments in a major waterfowl overwintering wetland in the southeastern United States over two growing seasons. We found that herbivory inhibited the oxidation of CH4 , leading to a mean increase in emission by 230% over control plots, and prevented nitrification, as indicated by low nitrate availability and undetectable emissions of nitrous oxide...
November 4, 2016: Ecology
https://www.readbyqxmd.com/read/27918468/transcriptome-analysis-of-the-tadpole-shrimp-triops-longicaudatus-by-illumina-paired-end-sequencing-assembly-annotation-and-marker-discovery
#14
Jiyeon Seong, Se Won Kang, Bharat Bhusan Patnaik, So Young Park, Hee Ju Hwang, Jong Min Chung, Dae Kwon Song, Mi Young Noh, Seung-Hwan Park, Gwang Joo Jeon, Hong Sik Kong, Soonok Kim, Ui Wook Hwang, Hong Seog Park, Yeon Soo Han, Yong Seok Lee
The tadpole shrimp (Triops longicaudatus) is an aquatic crustacean that helps control pest populations. It inhabits freshwater ponds and pools and has been described as a living fossil. T. longicaudatus was officially declared an endangered species South Korea in 2005; however, through subsequent protection and conservation management, it was removed from the endangered species list in 2012. The limited number of available genetic resources on T. longicaudatus makes it difficult to obtain valuable genetic information for marker-aided selection programs...
December 2, 2016: Genes
https://www.readbyqxmd.com/read/27918019/three-dimensional-mof-sponge-for-fast-dynamic-adsorption
#15
Huizeng Li, Mingzhu Li, Wenbo Li, Qiang Yang, Yanan Li, Zhenkun Gu, Yanlin Song
Nowadays, environmental pollution is a big problem. Metal organic frameworks (MOFs) provide a novel strategy for exhaust gases adsorption and toxic pollutants removal. We proposed a facile and versatile method to prepare a highly efficient three dimensional MOF-sponge by coating MOF crystals on polyurethane sponge surface, mimicking the porous structure of the marine animal, sponge. Owing to combination of the spatial structure of the commercial sponge and the excellent adsorption capacity of MOF coatings, the MOF-sponge possessed good permeability and high dynamic adsorption capacity...
December 5, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27916898/a-multi-pumping-flow-system-for-in-situ-measurements-of-dissolved-manganese-in-aquatic-systems
#16
David Meyer, Ralf D Prien, Olaf Dellwig, Joanna J Waniek, Ingo Schuffenhauer, Jan Donath, Siegfried Krüger, Malte Pallentin, Detlef E Schulz-Bull
A METals In Situ analyzer (METIS) has been used to determine dissolved manganese (II) concentrations in the subhalocline waters of the Gotland Deep (central Baltic Sea). High-resolution in situ measurements of total dissolved Mn were obtained in near real-time by spectrophotometry using 1-(2-pyridylazo)-2-naphthol (PAN). PAN is a complexing agent of dissolved Mn and forms a wine-red complex with a maximum absorbance at a wavelength of 562 nm. Results are presented together with ancillary temperature, salinity, and dissolved O 2 data...
November 30, 2016: Sensors
https://www.readbyqxmd.com/read/27916864/marine-organisms-with-anti-diabetes-properties
#17
REVIEW
Chiara Lauritano, Adrianna Ianora
Diabetes is a chronic degenerative metabolic disease with high morbidity and mortality rates caused by its complications. In recent years, there has been a growing interest in looking for new bioactive compounds to treat this disease, including metabolites of marine origin. Several aquatic organisms have been screened to evaluate their possible anti-diabetes activities, such as bacteria, microalgae, macroalgae, seagrasses, sponges, corals, sea anemones, fish, salmon skin, a shark fusion protein as well as fish and shellfish wastes...
December 1, 2016: Marine Drugs
https://www.readbyqxmd.com/read/27916716/effects-of-a-non-competitive-n-methyl-d-aspartate-nmda-antagonist-tiletamine-in-adult-zebrafish
#18
Tatiana O Kolesnikova, Sergey L Khatsko, Vadim A Shevyrin, Yuri Yu Morzherin, Allan V Kalueff
Tiletamine is a non-competitive N-methyl-d-aspartate (NMDA) receptor antagonist chemically related to ketamine and phencyclidine. A common veterinary anesthetic drug, tiletamine is currently a Schedule III controlled substance. This compound exerts sedative effects in humans and animals, also having an abuse potential, toxicity and dissociative hallucinogenic properties clinically. However, the neurotropic profile of tiletamine remains poorly understood, necessitating novel models and in-vivo screens, including non-mammalian species...
December 1, 2016: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/27916312/effects-of-pulse-and-press-additions-of-salt-on-biofilms-of-nutrient-rich-streams
#19
Joaquín Cochero, Magdalena Licursi, Nora Gómez
Chronic and pulse increments of salinity can cause different consequences on the aquatic communities, and its effects are related to factors such as the magnitude, frequency and ionic composition, as well as on the baseline salt concentrations in the water. The aim of this study was to explore the responses of the biofilms from a nutrient-rich stream to both pulse and chronic additions of salt, along with their recovery after the stressor had been removed. For this purpose, a microcosm study was conducted exposing biofilms to water enriched with sodium chloride in two treatments (press and pulse), and comparing the changes in the biofilm with control microcosms without salt additions...
December 1, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27916306/mass-loading-and-emission-of-benzophenone-3-bp-3-and-its-derivatives-in-wastewater-treatment-plants-in-new-york-state-usa
#20
Wei Wang, Kurunthachalam Kannan
The occurrence of benzophenone type ultra-violet (UV) light filters, especially 2-hydroxy-4-methoxy benzophenone (2OH-4MeO-BP; BP-3), in aquatic ecosystems is a concern due to the endocrine disruption potential of these chemicals. In this study, mass loading, emission and fate of BP-3 and its derivatives were investigated in two wastewater treatment plants (WWTPs) in the Albany area of New York State, USA. The median concentrations of BP-3 and sum of its four derivatives (ΣBPderivatives) in influents were 35...
December 1, 2016: Science of the Total Environment
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