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https://www.readbyqxmd.com/read/28822256/addressing-harmful-algal-blooms-habs-impacts-with-ferrate-vi-simultaneous-removal-of-algal-cells-and-toxins-for-drinking-water-treatment
#1
Yang Deng, Meiyin Wu, Huiqin Zhang, Lei Zheng, Yaritza Acosta, Tsung-Ta D Hsu
Although ferrate(VI) has long been recognized as a multi-purpose treatment agent, previous investigations regarding ferrate(VI) for addressing harmful algal blooms (HABs) impacts in drinking water treatment only focused on a single HAB pollutant (e.g. algal cells or algal toxins). Moreover, the performance of ferrate(VI)-driven coagulation was poorly investigated in comparison with ferrate(VI) oxidation, though it has been widely acknowledged as a major ferrate(VI) treatment mechanism. We herein reported ferrate(VI) as an emerging agent for simultaneous and effective removal of algal cells and toxins in a simulated HAB-impacted water...
August 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28813504/effect-of-co2-induced-seawater-acidification-on-growth-photosynthesis-and-inorganic-carbon-acquisition-of-the-harmful-bloom-forming-marine-microalga-karenia-mikimotoi
#2
Shunxin Hu, Bin Zhou, You Wang, Ying Wang, Xinxin Zhang, Yan Zhao, Xinyu Zhao, Xuexi Tang
Karenia mikimotoi is a widespread, toxic and non-calcifying dinoflagellate, which can release and produce ichthyotoxins and hemolytic toxins affecting the food web within the area of its bloom. Shifts in the physiological characteristics of K. mikimotoi due to CO2-induced seawater acidification could alter the occurrence, severity and impacts of harmful algal blooms (HABs). Here, we investigated the effects of elevated pCO2 on the physiology of K. mikimotoi. Using semi-continuous cultures under controlled laboratory conditions, growth, photosynthesis and inorganic carbon acquisition were determined over 4-6 week incubations at ambient (390ppmv) and elevated pCO2 levels (1000 ppmv and 2000 ppmv)...
2017: PloS One
https://www.readbyqxmd.com/read/28806552/exposure-of-engineered-nanoparticles-to-alexandrium-tamarense-dinophyceae-healthy-impacts-of-nanoparticles-via-toxin-producing-dinoflagellate
#3
Manlu Li, Daoyi Chen, Yang Liu, Chia Ying Chuang, Fanzhou Kong, Paul J Harrison, Xiaoshan Zhu, Yuelu Jiang
Human activities can enhance the frequency, intensity and occurrence of harmful algal blooms (HABs). Engineered nanoparticles (ENPs), contained in many materials, will inevitably enter coastal waters and thus cause unpredictable impacts on aquatic organisms. However, knowledge of the influence of ENPs on HAB species is still lacking. In this study, we examined the effects of titanium dioxide nanoparticles (nTiO2), zinc oxide nanoparticles (nZnO) and aluminum oxide nanoparticles (nAl2O3) on physiological changes and paralytic shellfish poisoning toxins (PSTs) production of Alexandrium tamarense...
August 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28801171/microorganisms-based-methods-for-harmful-algal-blooms-control-a-review
#4
REVIEW
Rui Sun, Pengfei Sun, Jianhong Zhang, Sofia Esquivel-Elizondo, Yonghong Wu
Harmful algal blooms (HABs) are a worldwide problem with numerous negative effects on water systems, which have prompted researchers to study applicable measures to inhibit and control them. This review summarized the current microorganisms-based methods or technologies aimed at controlling HABs. Based on their characteristics, these methods can be divided into two categories: methods based on single-species microorganisms and methods based on microbial aggregates, and four types: methods for rapid decrease of algal cells density (e...
August 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28800687/the-profound-effect-of-harmful-cyanobacterial-blooms-from-food-web-and-management-perspectives
#5
Sigitas Šulčius, Danguolė Montvydienė, Hanna Mazur-Marzec, Jūratė Kasperovičienė, Rokas Rulevičius, Živilė Cibulskaitė
Sustainable and effective water management plans must have a reliable risk assessment strategies for harmful cyanobacterial blooms (HABs) that would enable timely decisions to be made, thus avoiding the trespassing of ecological thresholds, leading to the collapse of ecosystem structure and function. Such strategies are usually based on cyanobacterial biomass and/or on the monitoring of known toxins, which may, however, in many cases, under- or over-represent the actual toxicity of the HAB. Therefore, in this study, by the application of growth-inhibition assays using different bacteria, algae, zooplankton and fish species, we assessed the toxicological potential of two cyanobacterial blooms that differed in total cyanobacterial biomass, species composition and cyanopeptide profiles...
August 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28777959/fast-growing-algicidal-streptomyces-sp-u3-and-its-potential-in-harmful-algal-bloom-controls
#6
Xiaoqi Yu, Guanjing Cai, Hui Wang, Zhong Hu, Wei Zheng, Xueqian Lei, Xiaoying Zhu, Yao Chen, Qiuliang Chen, Hongyan Din, Hong Xu, Yun Tian, Lijun Fu, Tianling Zheng
To find the potential algicidal microorganisms and apply them to prevent and terminate harmful algal blooms (HABs), we isolated an actinomycete U3 from Mangrove, which had a potent algicidal effect on the harmful alga Heterosigma akashiwo. It could completely lyse the algal cells by producing active compounds, which were highly sensitive to high temperature and strong alkaline, but resistant to acid. One μg/mL of crude extract of the fermentation supernatant could kill 70% of H. akashiwo cells in 3 d. Unlike most of the other known algicidal Streptomyces, U3 showed strong ability of proliferation with the algal inclusion as the nutrient source...
June 23, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28755719/understanding-the-blob-bloom-warming-increases-toxicity-and-abundance-of-the-harmful-bloom-diatom-pseudo-nitzschia-in-california-coastal-waters
#7
Zhi Zhu, Pingping Qu, Feixue Fu, Nancy Tennenbaum, Avery O Tatters, David A Hutchins
The toxic diatom genus Pseudo-nitzschia produces environmentally damaging harmful algal blooms (HABs) along the U.S. west coast and elsewhere, and a recent ocean warming event coincided with toxic blooms of record extent. This study examined the effects of temperature on growth, domoic acid toxin production, and competitive dominance of two Pseudo-nitzschia species from Southern California. Growth rates of cultured P. australis were maximal at 23°C (∼0.8d(-1)), similar to the maximum temperature recorded during the 2014-2015 warming anomaly, and decreased to ∼0...
July 2017: Harmful Algae
https://www.readbyqxmd.com/read/28755633/embryotoxic-effects-of-dissolved-okadaic-acid-on-the-development-of-longfin-yellowtail-seriola-rivoliana
#8
J Le Du, D Tovar-Ramírez, E J Núñez-Vázquez
In the context of global climate change where harmful algal blooms (HABs) might become more frequent and more severe, several studies have been conducted on the perturbation of embryonic development of marine animals by microalgal toxins. Okadaic acid (OA) and analogs (DSP toxins) produced by dinoflagellates of the genera Dynophysis and Prorocentrum are known to disturb embryogenesis. This study investigated the impact of dissolved DSP toxin (OA and Dinophysistoxin 1, DTX-1) exposure on embryo development of Longfin yellowtail Seriola rivoliana...
September 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28732992/the-effects-of-altering-reaction-conditions-in-green-sonochemical-synthesis-of-a-thallium-i-coordination-polymer-and-in-achieving-to-different-morphologies-of-thallium-iii-oxide-nanostructures-via-solid-state-process
#9
Zeinab Hazrati, Kamran Akhbari, Anukorn Phuruangrat
In order to studies the effects of solvent and concentration of initial reagents on formation of [Tl(μ4-AB)]n (1), [HAB=4-aminobenzoic acid] coordination polymer, some experiments were designed and four samples of 1 were synthesized by sonochemical process. High concentration of initial reagents resulted in formation of compound 1 microrods. With low concentration of initial reagents, various morphologies of 1 were obtained. These four samples had been used as new precursors for preparation of thallium(III) oxide nanostructures via solid-state thermal decomposition process...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28726931/electron-transfer-reactions-of-halogenated-electrophiles-a-different-look-into-the-nature-of-halogen-bonding
#10
Sergiy V Rosokha
The rates of oxidation of ferrocene derivatives by brominated molecules R-Br (CBr3CN, CBr4, CBr3NO2, CBr3COCBr3, CBr3CONH2, CBr3F, and CBr3H) were consistent with the predictions of the outer-sphere dissociative electron-transfer theory. The similar redox-reactions of the R-Br electrophiles with the typical halogen-bond acceptors tetramethyl-p-phenylenediamine (TMPD) or iodide were much faster than calculated using the same model. The fast redox-processes in these systems were related to the involvement of the transient halogen-bonded [R-Br, TMPD] or [R-Br, I(-)] complexes in which barriers for electron transfer were lowered by the strong electronic coupling of reactants...
July 20, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28720498/rna-aptamers-targeted-for-human-%C3%AE-a-crystallin-do-not-bind-%C3%AE-b-crystallin-and-spare-the-%C3%AE-crystallin-domain
#11
Prabhat K Mallik, Hua Shi, Jayanti Pande
The molecular chaperones, α-crystallins, belong to the small heat shock protein (sHSP) family and prevent the aggregation and insolubilization of client proteins. Studies in vivo have shown that the chaperone activity of the α-crystallins is raised or lowered in various disease states. Therefore, the development of tools to control chaperone activity may provide avenues for therapeutic intervention, as well as enable a molecular understanding of chaperone function. The major human lens α-crystallins, αA- (HAA) and αB- (HAB), share 57% sequence identity and show similar activity towards some clients, but differing activities towards others...
July 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28707611/chromatography-theory-and-applications-in-memoriam-of-prof-dr-hab-edward-soczewi%C3%A5-ski-1928-2016
#12
Tomasz Tuzimski
No abstract text is available yet for this article.
July 13, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28703811/cytoplasmic-fragment-of-cd147-generated-by-regulated-intramembrane-proteolysis-contributes-to-hcc-by-promoting-autophagy
#13
Bo Wu, Jian Cui, Xiang-Min Yang, Zhen-Yu Liu, Fei Song, Ling Li, Jian-Li Jiang, Zhi-Nan Chen
Hepatocellular carcinoma (HCC) is one of the most lethal and prevalent cancers worldwide. CD147 (EMMPRIN or basigin) is a leading gene relating to hepatocarcinogenesis and metastasis, and is detected in transmembrane, exosome or circulating forms in HCC patients. The endosome recycling of CD147 further enhances the function of this oncoprotein from a dynamic perspective. However, previous studies about CD147 mainly focused on one separate form, and little attention has been paid to how the different forms of tumor-derived CD147 changes...
July 13, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28686224/a-balanced-risk-benefit-analysis-to-determine-human-risks-associated-with-pyrrolizidine-alkaloids-pa-the-case-of-tea-and-herbal-infusions
#14
REVIEW
Michael Habs, Karin Binder, Stefan Krauss, Karolina Müller, Brigitte Ernst, Luzia Valentini, Michael Koller
Humans are exposed to pyrrolizidine alkaloids (PA) through different sources, mainly from contaminated foodstuff. Teas and herbal infusions (T&HI) can be contaminated by PA producing weed. PA can possess toxic, mutagenic, genotoxic, and carcinogenic properties. Thus, possible health risks for the general population are under debate. There is a strong safety record for T&HI and additionally epidemiological evidence for the preventive effects of regular tea consumption on cardiovascular events and certain types of cancer...
July 7, 2017: Nutrients
https://www.readbyqxmd.com/read/28682085/anxiety-hostile-attributions-and-differences-in-heart-rate-response-to-ambiguous-situational-vignettes-in-adolescents
#15
Donice M Banks, Brandon G Scott, Carl F Weems
Theoretically, subjective levels of anxiety and hostile attributions of intent may affect physiological responding to ambiguous social situations. This study examined youths' (n = 80 aged 11-17 years; 51% female; 37.5% African American) physiological responding (i.e., heart rate [HR]) to a series of animated vignettes depicting ambiguous social situations. Anxiety, aggression, hostile attributional bias (HAB), and their interactions were tested as predictors of differential physiological responding to the vignettes...
July 6, 2017: Emotion
https://www.readbyqxmd.com/read/28673426/transcriptional-and-biochemical-analysis-of-antioxidant-enzymes-in-the-mussel-mytilus-galloprovincialis-during-experimental-exposures-to-the-toxic-dinoflagellate-prorocentrum-lima
#16
M V Prego-Faraldo, L R Vieira, J M Eirin-Lopez, J Méndez, L Guilhermino
The genotoxic and cytotoxic effects of Diarrhetic Shellfish Poisoning (DSP) toxins have been widely investigated in bivalve molluscs, representing the main vectors of these compounds in the Atlantic coast of Europe. DSP toxins are produced by Harmful Algal Blooms (HABs) of Dinophysis and Prorocentrum dinoflagellates, being subsequently accumulated by marine organisms and biomagnified throughout trophic webs. Yet, bivalves display increased resistance to the harmful effects of these toxins during HAB episodes...
August 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28658260/spatiotemporal-variability-and-environmental-factors-of-harmful-algal-blooms-habs-over-western-lake-erie
#17
Di Tian, Gengxin Xie, Jing Tian, Kuo-Hsin Tseng, C K Shum, Jiyoung Lee, Song Liang
Over the past decades, numerous studies have been carried out in understanding causes of Harmful Algal Blooms (HABs) and their dynamics, yielding great knowledge in this field. Lake Erie, the fourth-largest lake of the five Great Lake, is among those highly vulnerable to the impacts of HABs and has received substantial attention from the public, water management sectors, and academic field. Building upon previous work, this study aims to characterize spatiotemporal variability of Chlorophyll a (Chl-a), which is an important indicator of HABs, and to explore relative importance of environmental factors associated with HABs in the west Lake Erie...
2017: PloS One
https://www.readbyqxmd.com/read/28636342/charge-transfer-properties-of-triarylamine-integrated-dimolybdenum-dyads
#18
Lu Chen, Suman Mallick, Ying Ning Tan, Miao Meng, Chun Y Liu
Three quadruply bonded dimolybdenum complexes equipped with a triarylamine pendant, [(DAniF)3Mo2(μ-O2CC6H4N(C6H4CH3)2] (DAniF = N,N'-di(p-anisyl)formamidinate; [OO-ph-N]), [(DAniF)3Mo2(μ-OSCC6H4N(C6H4CH3)2] ([OS-ph-N]), and [(DAniF)3Mo2(μ-S2CC6H4N(C6H4CH3)2] ([SS-ph-N]), have been synthesized and characterized by single crystal X-ray diffraction. In electrochemical measurements, the redox couple for the organic amine group becomes irreversible, reflecting the substantially strong electronic interaction between the dimetal center and organic redox site...
June 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28634473/toxic-effects-of-prodigiosin-secreted-by-hahella-sp-ka22-on-harmful-alga-phaeocystis-globosa
#19
Huajun Zhang, Hui Wang, Wei Zheng, Zhiyuan Yao, Yun Peng, Su Zhang, Zhong Hu, Zhen Tao, Tianling Zheng
Application of algicidal compounds secreted by bacteria is a promising and environmentally friendly strategy to control harmful algal blooms (HABs). Years ago prodigiosin was described as an efficient algicidal compound, but the details about the effect of prodigiosin on algal cells are still elusive. Prodigiosin shows high algicidal activity on Phaeocystis globosa, making it a potential algicide in HAB control. When P. globosa were treated with prodigiosin at 5 μg/mL, algae cells showed cytoplasmic hypervacuolization, chloroplast and nucleus rupture, flagella missing, and cell fracture, when observed by scanning electron microscope and transmission electron microscopy...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28633833/recent-advances-in-ultrasonic-treatment-challenges-and-field-applications-for-controlling-harmful-algal-blooms-habs
#20
REVIEW
Jungsu Park, Jared Church, Younggyu Son, Keug-Tae Kim, Woo Hyoung Lee
Algal blooms are a naturally occurring phenomenon which can occur in both freshwater and saltwater. However, due to excess nutrient loading in water bodies (e.g. agricultural runoff and industrial activities), harmful algal blooms (HABs) have become an increasing issue globally, and can even cause health effects in humans due to the release of cyanotoxins. Among currently available treatment methods, sonication has received increasing attention for algal control because of its low impact on ecosystems and the environment...
September 2017: Ultrasonics Sonochemistry
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