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https://www.readbyqxmd.com/read/28110142/characteristics-of-water-obtained-by-dewatering-cyanobacteria-containing-sludge-formed-during-drinking-water-treatment-including-c-n-disinfection-byproduct-formation
#1
Hangzhou Xu, Haiyan Pei, Yan Jin, Hongdi Xiao, Chunxia Ma, Jiongming Sun, Hongmin Li
This is the first study to systematically investigate the characteristics of the water obtained by dewatering cyanobacteria-containing sludge generated in the drinking water treatment plant, including formation of C- and N-disinfection by-products (DBPs). Results showed that this 'dewatering water' (DW) had different properties when the sludge was stored at different times. The content of dissolved organic matter (DOM) and microcystins (MCs) in the DW were low when the sludge was treated or disposed of within 4 days; correspondingly, the C-, N-DBP production was also low...
January 13, 2017: Water Research
https://www.readbyqxmd.com/read/28108163/reducement-of-cadmium-adsorption-on-clay-minerals-by-the-presence-of-dissolved-organic-matter-from-animal-manure
#2
Wenjun Zhou, Lingwei Ren, Lizhong Zhu
Clay minerals are the most popular adsorbents/amendments for immobilizing heavy metals in contaminated soils, but the dissolved organic matter (DOM) in soil environment would potentially affect the adsorption/immobilization capacity of clay minerals for heavy metals. In this study, the effects of DOM derived from chicken manure (CM) on the adsorption of cadmium (Cd(2+)) on two clay minerals, bentonite and zeolite, were investigated. The equilibrium data for Cd(2+) sorption in the absence or presence of CM-DOM could be well-fitted to the Langmuir equation (R(2) > 0...
January 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28107749/use-of-fluorescence-spectroscopy-to-control-ozone-dosage-in-recirculating-aquaculture-systems
#3
Aikaterini Spiliotopoulou, Richard Martin, Lars-Flemming Pedersen, Henrik R Andersen
The aim of this study was to investigate the potential of fluorescence spectroscopy to be used as an ozone dosage determination tool in recirculating aquaculture systems (RASs), by studying the relationship between fluorescence intensities and dissolved organic matter (DOM) degradation by ozone, in order to optimise ozonation treatment. Water samples from six different Danish facilities (two rearing units from a commercial trout RAS, a commercial eel RAS, a pilot RAS and two marine water aquariums) were treated with different O3 dosages (1...
December 24, 2016: Water Research
https://www.readbyqxmd.com/read/28106312/pain-evoked-trunk-muscle-activity-changes-during-fatigue-and-doms
#4
L H Larsen, R P Hirata, T Graven-Nielsen
BACKGROUND: Muscle pain may reorganize trunk muscle activity but interactions with exercise-related muscle fatigue and delayed onset muscle soreness (DOMS) is to be clarified. METHODS: In 19 healthy participants, the trunk muscle activity during 20 multi-directional unpredictable surface perturbations were recorded after bilateral isotonic saline injections (control) and during unilateral and bilateral hypertonic saline-induced low back pain (LBP) in conditions of back muscle fatigue (Day-1) and DOMS (Day-2)...
January 20, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28103294/community-based-entomological-surveillance-reveals-urban-foci-of-chagas-disease-vectors-in-sobral-state-of-cear%C3%A3-northeastern-brazil
#5
Cynara Carvalho Parente, Fernando S M Bezerra, Plutarco I Parente, Raimundo V Dias-Neto, Samanta C C Xavier, Alberto N Ramos, Filipe A Carvalho-Costa, Marli M Lima
BACKGROUND: The aim of this work was to explore the potential risk of vector-borne Chagas disease in urban districts in northeastern Brazil, by analyzing the spatiotemporal distributions and natural infection rates with Trypanosoma cruzi of triatomine species captured in recent years. The main motivation of this work was an acute human case of Chagas disease reported in 2008 in the municipality of Sobral. METHODOLOGY/PRINCIPAL FINDINGS: We analyzed data from community-based entomological surveillance carried out from 2010 to 2014...
2017: PloS One
https://www.readbyqxmd.com/read/28101708/characterization-of-interaction-between-amino-acids-and-fulvic-like-organic-matter-by-fluorescence-spectroscopy-combining-thermodynamic-calculation
#6
Tao Lin, Bingwei Hou, Jian Wang, Yaqun Xu, Wei Chen
Dissolved organic matter (DOM), as a very fine colloidal suspension, could inevitably affect the transformation process of dissolved organic nitrogen (DON) in drinking water treatment. Tryptophan and tyrosine were used as representatives of DON to investigate the interactions between amino acids and fulvic-like components of fluorescent DOM using titration experiments. The fluorescence intensity decreased significantly with the increasing fulvic acid (FA) concentration, suggesting that FA could greatly quench the intrinsic fluorescence of amino acids such as tryptophan and tyrosine...
January 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28097070/sponge-exhalent-seawater-contains-a-unique-chemical-profile-of-dissolved-organic-matter
#7
Cara L Fiore, Christopher J Freeman, Elizabeth B Kujawinski
Sponges are efficient filter feeders, removing significant portions of particulate and dissolved organic matter (POM, DOM) from the water column. While the assimilation and respiration of POM and DOM by sponges and their abundant microbial symbiont communities have received much attention, there is virtually no information on the impact of sponge holobiont metabolism on the composition of DOM at a molecular-level. We applied untargeted and targeted metabolomics techniques to characterize DOM in seawater samples prior to entering the sponge (inhalant reef water), in samples exiting the sponge (exhalent seawater), and in samples collected just outside the reef area (off reef seawater)...
2017: PeerJ
https://www.readbyqxmd.com/read/28089702/the-visible-burrow-system-a-view-from-across-the-hall
#8
REVIEW
James P Herman, Kellie L Tamashiro
The visible burrow system (VBS) is an ethologically relevant social stress model that creates a distinct dominance hierarchy in rats. Randall Sakai's laboratory performed an impressive series of studies documenting the very different impact of VBS exposure on the brain and behavior of dominants (DOM) and subordinates (SUBs). Hierarchy formation causes pronounced changes in metabolism in SUBs relative to both DOMs and unstressed controls, resulting in marked weight loss and metabolic imbalance. Stress testing revealed multiple phenotypes in the VBS, including DOMs, stress-responsive SUBs and stress-non-responsive SUBs...
January 12, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28088716/unveiling-the-transformation-and-bioavailability-of-dissolved-organic-matter-in-contrasting-hydrothermal-vents-using-fluorescence-eem-parafac
#9
Liyang Yang, Wan-E Zhuang, Chen-Tung Arthur Chen, Bing-Jye Wang, Fu-Wen Kuo
The submarine hydrothermal systems are extreme environments where active cycling of dissolved organic matter (DOM) may occur. However, little is known about the optical properties and bioavailability of hydrothermal DOM, which could provide valuable insights into its transformation processes and biogeochemical reactivity. The quantity, quality, and bioavailability of DOM were investigated for four very different hydrothermal vents east of Taiwan, using dissolved organic carbon (DOC), absorption spectroscopy, and fluorescence excitation-emission matrices-parallel factor analysis (EEM-PARAFAC)...
January 3, 2017: Water Research
https://www.readbyqxmd.com/read/28088531/the-effect-of-dissolved-organic-matter-on-soybean-peroxidase-mediated-removal-of-triclosan-in-water
#10
Jianhua Li, Ya Zhang, Jianbiao Peng, Xinan Wu, Shixiang Gao, Liang Mao
Dissolved organic matter (DOM) is ubiquitous in water and involved in numerous important chemical processes in aqueous systems, enabling it a unique challenge for a variety of water treatment processes. Soybean peroxidase (SBP)-based enzymatic process, as a promising treatment technique, has been successfully applied to remove pollutants in wastewaters such as coal-tar and refinery wastewater. In this study, the effect of DOM on the removal of polychlorinated aromatic antimicrobials triclosan (TCS) by SBP was investigated...
January 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28074372/tracking-fluorescent-components-of-dissolved-organic-matter-from-soils-in-large-scale-irrigated-area
#11
Hongwei Pan, Huibin Yu, Yonghui Song, Lin Zhu, Ruixia Liu, Erdeng Du
Combination of fluorescence excitation-emission matrix spectroscopy with parallel factor analysis (PARAFAC) and principal component analysis (PCA) was engaged to track fluorescent components of dissolved organic matter (DOM) extracted from soils, to seek potential factors, and to reveal their correlations with physico-chemical properties of soils. Soil samples at different depths were collected in Hetao irrigated area of Inner Mongolia, China. Five fluorescent components (C1 to C5) were identified by PARAFAC modeling of DOM extracted from the soil samples...
January 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28070815/microbial-transformation-of-intracellular-dissolved-organic-matter-from-microcystis-aeruginosa-and-its-effect-on-the-binding-of-pyrene-under-oxic-and-anoxic-conditions
#12
Chenghu Yang, Yangzhi Liu, Yaxian Zhu, Yong Zhang
The environmental behaviour and the bioavailability of polycyclic aromatic hydrocarbons (PAHs) are strongly affected by dissolved organic matter (DOM) in aquatic environments. In this study, we investigated the dynamics of the bioavailability and character of the intracellular DOM (IDOM) from Microcystis aeruginosa (M. aeruginosa-IDOM) during 10 days oxic and anoxic incubations by spectroscopy. Subsequently, the binding affinity of pyrene with the initial/altered M. aeruginosa-IDOM was estimated by fluorescence quenching method...
January 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28069102/the-effect-of-cp-concentration-in-the-diet-on-urea-kinetics-and-microbial-usage-of-recycled-urea-in-cattle-a-meta-analysis
#13
E D Batista, E Detmann, S C Valadares Filho, E C Titgemeyer, R F D Valadares
In ruminants, urea recycling is considered an evolutionary advantage. The amount of urea recycled mainly depends of the nitrogen (N) intake and the amount of organic matter (OM) digested in the rumen. Because recycled N contributes to meeting microbial N requirements, accurate estimates of urea recycling can improve the understanding of efficiency of N utilization and N losses to the environment. The objective of this study was to evaluate urea kinetics and microbial usage of recycled urea N in ruminants using a meta-analytical approach...
January 10, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28068536/application-of-uv-absorbance-and-fluorescence-indicators-to-assess-the-formation-of-biodegradable-dissolved-organic-carbon-and-bromate-during-ozonation
#14
Wen-Tao Li, Meng-Jie Cao, Tessora Young, Barbara Ruffino, Michael Dodd, Ai-Min Li, Gregory Korshin
This study examined the significance of changes of UV absorbance and fluorescence of dissolved organic matter (DOM) as surrogate indicators for assessing the formation of bromate and biodegradable dissolved organic carbon (BDOC) during the ozonation of surface water and wastewater effluent. Spectroscopic monitoring was carried out using benchtop UV/Vis and fluorescence spectrophotometers and a newly developed miniature LED UV/fluorescence sensor capable of rapidly measuring UVA280 and protein-like and humic-like fluorescence...
January 3, 2017: Water Research
https://www.readbyqxmd.com/read/28055117/confidentiality-and-the-role-of-the-addiction-specialist-team-in-liver-transplantation-procedures-commentary-on-donnadieu-rigole-et%C3%A2-al-2016-follow-up-of-alcohol-consumption-after-liver-transplantation-interest-of-an-addiction-team
#15
Geert Dom
For patients suffering from end-stage alcoholic liver disease (ALD), liver transplantation (LT) is often the only remaining, life-saving intervention. During the last two decades the number of transplantations that have been performed in the context of ALD has being growing steadily both in the United States and Europe. For example, 30-50% of all liver transplantations in Europe are currently done for this indication (Bruha et al., 2012). This article is protected by copyright. All rights reserved.
January 5, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28043243/-association-between-sense-of-coherence-and-occupational-stress-of-workers-in-modern-service-industry-in-shanghai-china
#16
X Y Lu, J M Dai, N Wu, C Shu, J L Gao, H Fu
Objective: To investigate understand the current status of the sense of coherence and occupational stress in modern service workers, and to analyze the association between occupational stress and the sense of coherence. Methods: From March to April, 2016, 834 modern service workers from 3 companies in Shanghai, China (in air transportation industry, marketing industry, and travel industry) were surveyed by non-ran-dom sampling. The self-completion questionnaires were filled out anonymously given the informed consent of the workers...
October 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28042892/the-characterization-of-dissolved-organic-matter-extracted-from-different-sources-and-their-influence-on-cadmium-uptake-by-microcystis-aeruginosa
#17
Lixiao Ni, Lili Su, Shiyin Li, Peifang Wang, Dandan Li, Xiang Ye, Yi Li, Yong Li, Yiping Li, Chao Wang
This study examines the uptake of the heavy metal cadmium (Cd) by Microcystis aeruginosa (M. aeruginosa) in the presence of dissolved organic matter (DOM) from different origins. The DOM used in this study were extracted from soil, sediment taken from Meiliang Bay at Taihu Lake and from M. aeruginosa cultured in the laboratory. The three different DOM were characterized using UV-visible absorption spectroscopy and Fourier transform infrared (FTIR) spectroscopy. The excitation-emission matrix (EEM) fluorescence spectroscopy was used to characterize the interactions of DOM with Cd(2+) ...
January 2, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28034948/mining-for-deep-end-gps-a-group-forged-with-steel-in-yorkshire-and-humber
#18
Liz Walton, Tom Ratcliffe, Ben E Jackson, Dom Patterson
No abstract text is available yet for this article.
January 2017: British Journal of General Practice: the Journal of the Royal College of General Practitioners
https://www.readbyqxmd.com/read/28034434/comparison-study-of-phosphorus-adsorption-on-different-waste-solids-fly-ash-red-mud-and-ferric-alum-water-treatment-residues
#19
Ying Wang, Yange Yu, Haiyan Li, Chanchan Shen
The adsorption of phosphorus (P) onto three industrial solid wastes (fly ash, red mud and ferric-alum water treatment residual (FAR)) and their modified materials was studied systematically via batch experiments. Compared with two natural adsorbents (zeolite and diatomite), three solid wastes possessed a higher adsorption capacity for P because of the higher Fe, Al and Ca contents. After modification (i.e., the fly ash and red mud modified by FeCl3 and FARs modified by HCl), the adsorption capacity increased, especially for the modified red mud, where more Fe bonded P was observed...
December 2016: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28025376/local-and-generalized-endogenous-pain-modulation-in-healthy-men-effects-of-exercise-and-exercise-induced-muscle-damage
#20
Christopher D Black, Brandon K Tynes, Alexander R Gonglach, Dwight E Waddell
: Isometric exercise has been shown to activate endogenous pain inhibitory pathways in healthy adults, but not in some clinical pain populations. OBJECTIVE:  Exercise-induced muscle damage (EIMD) and the associated delayed-onset muscle soreness (DOMS) are a model for studying clinical pain; thus, our purpose was to examine the effects of isometric exercise on pressure pain threshold (PPT) in the presence and absence of DOMS. METHODS:  Data were collected on 23 males (22...
December 2016: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
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