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https://www.readbyqxmd.com/read/28636342/charge-transfer-properties-of-triarylamine-integrated-dimolybdenum-dyads
#1
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
#2
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
#3
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
https://www.readbyqxmd.com/read/28605858/optimal-implementation-of-green-infrastructure-practices-to-minimize-influences-of-land-use-change-and-climate-change-on-hydrology-and-water-quality-case-study-in-spy-run-creek-watershed-indiana
#4
Yaoze Liu, Bernard A Engel, Paris D Collingsworth, Bryan C Pijanowski
Nutrient loading from the Maumee River watershed is a significant reason for the harmful algal blooms (HABs) problem in Lake Erie. The nutrient loading from urban areas needs to be reduced with the installation of green infrastructure (GI) practices. The Long-Term Hydrologic Impact Assessment-Low Impact Development 2.1 (L-THIA-LID 2.1) model was used to explore the influences of land use (LU) and climate change on water quantity and quality in Spy Run Creek watershed (SRCW) (part of Maumee River watershed), decide whether and where excess phosphorus loading existed, identify critical areas to understand where the greatest amount of runoff/pollutants originated, and optimally implement GI practices to obtain maximum environmental benefits with the lowest costs...
June 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28604648/prevalence-variability-and-bioconcentration-of-saxitoxin-group-in-different-marine-species-present-in-the-food-chain
#5
Javiera Oyaneder Terrazas, Héctor R Contreras, Carlos García
The saxitoxin-group (STX-group) corresponds to toxic metabolites produced by cyanobacteria and dinoflagellates of the genera Alexandrium, Gymnodinium, and Pyrodinium. Over the last decade, it has been possible to extrapolate the areas contaminated with the STX-group worldwide, including Chile, a phenomenon that has affected ≈35% of the Southern Pacific coast territory, generating a high economic impact. The objective of this research was to study the toxicity of the STX-group in all aquatic organisms (bivalves, algae, echinoderms, crustaceans, tunicates, cephalopods, gastropods, and fish) present in areas with a variable presence of harmful algal blooms (HABs)...
June 12, 2017: Toxins
https://www.readbyqxmd.com/read/28603083/overexpressing-ibcbf3-increases-low-temperature-and-drought-stress-tolerance-in-transgenic-sweetpotato
#6
Rong Jin, Beg Hab Kim, Chang Yoon Ji, Ho Soo Kim, Hong Min Li, Dai Fu Ma, Sang-Soo Kwak
Dehydration-responsive element-binding/C-repeat-binding factor (DREB/CBF) proteins regulate the transcription of genes involved in cold acclimation in several species. However, little is known about the physiological functions of CBF proteins in the low temperature-sensitive crop sweetpotato. We previously reported that the DREB1/CBF-like sweetpotato gene SwDREB1/IbCBF3 is involved in responses to diverse abiotic stresses. In this study, we confirmed that IbCBF3 is localized to the nucleus and binds to the C-repeat/dehydration-responsive elements (CRT/DRE) in the promoters of cold-regulated (COR) genes...
June 3, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28602251/analysis-of-sterols-in-selected-bloom-forming-algae-in-china
#7
Hui-Xia Geng, Ren-Cheng Yu, Zhen-Fan Chen, Quan-Cai Peng, Tian Yan, Ming-Jiang Zhou
Sterols, a group of stable lipid compounds, are often used as biomarkers in marine biogeochemical studies to indicate sources of organic matter. In this study, sterols in 13 species of major bloom-forming algae in China, which belong to Dinophyceae, Bacillariophyceae, Ulvophyceae, and Pelagophyceae, were analyzed with gas chromatography-mass spectrometry (GC-MS) to test their feasibility in representing different types of harmful algal blooms (HABs). It was found that (24Z)-stigmasta-5,24-dien-3β-ol (28-isofucosterol) was a major sterol component in green-tide forming macroalga Ulva prolifera...
June 2017: Harmful Algae
https://www.readbyqxmd.com/read/28572290/the-variability-of-translocator-protein-signal-in-brain-and-blood-of-genotyped-healthy-humans-using-in-vivo-123-i-clinde-spect-imaging-a-test-retest-study
#8
Ling Feng, Per Jensen, Gerda Thomsen, Agnete Dyssegaard, Claus Svarer, Lars V Knudsen, Kirsten Møller, Carsten Thomsen, Jens D Mikkelsen, Denis Guilloteau, Gitte M Knudsen, Lars H Pinborg
(123)I-CLINDE is a radiotracer developed for SPECT and targets the 18-kDa translocator protein (TSPO). TSPO is upregulated in glial cells and used as a measure of neuroinflammation in a variety of central nervous system diseases. The aim of this study was to examine the test-retest variability of (123)I-CLINDE binding in healthy subjects. Methods: SPECT scans were acquired over 90 min in 16 healthy controls (9 women, 8 mixed-affinity binders [MABs] and 8 high-affinity binders [HABs] twice with an interval of 35 ± 15 d)...
June 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28532167/how-the-marine-biotoxins-affect-human-health
#9
Silvia Morabito, Serena Silvestro, Caterina Faggio
Several marine microalgae produce dangerous toxins very damaging to human health, aquatic ecosystems and coastal resources. These Harmful Algal Blooms (HABs) in recent decades seem greatly increased regarding frequency, severity and biogeographical level, causing serious health risks as a consequence of the consumption of contaminated seafood. Toxins can cause various clinically described syndromes, characterised by a wide range of symptoms: amnesic (ASP), diarrhoetic (DSP), azaspirazid (AZP), neurotoxic (NSP) and paralytic (PSP) shellfish poisonings and ciguatera fish poisoning...
May 22, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28531156/molecular-techniques-for-the-detection-of-organisms-in-aquatic-environments-with-emphasis-on-harmful-algal-bloom-species
#10
REVIEW
Linda K Medlin, Jahir Orozco
Molecular techniques to detect organisms in aquatic ecosystems are being gradually considered as an attractive alternative to standard laboratory methods. They offer faster and more accurate means of detecting and monitoring species, with respect to their traditional homologues based on culture and microscopic counting. Molecular techniques are particularly attractive when multiple species need to be detected and/or are in very low abundance. This paper reviews molecular techniques based on whole cells, such as microscope-based enumeration and Fluorescence In-Situ Hybridization (FISH) and molecular cell-free formats, such as sandwich hybridization assay (SHA), biosensors, microarrays, quantitative polymerase chain reaction (qPCR) and real time PCR (RT-PCR)...
May 22, 2017: Sensors
https://www.readbyqxmd.com/read/28527138/application-of-hyper-branched-rolling-circle-amplification-hrca-and-hrca-based-strip-test-for-the-detection-of-chattonella-marina
#11
Xiaoli Nie, Chunyun Zhang, Yuanyuan Wang, Changlu Guo, Jin Zhou, Guofu Chen
Harmful algal blooms (HABs) are global threats to marine ecosystems, fisheries, and human health. Therefore, developing effective and accurate methods for identifying causative algae and monitoring seawater quality is urgent. However, traditional, microscopy-based methods are complex, inaccurate, and time-consuming. Here, we present a novel method for effective and sensitive detection of Chattonella marina using hyper-branched rolling circle amplification (HRCA) and HRCA-based strip test (HBST). The large subunit (LSU) ribosomal DNA (rDNA) D1-D2 region of C...
May 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28526116/allelopathic-interactions-between-the-macroalga-hizikia-fusiformis-harvey-and-the-harmful-blooms-forming-dinoflagellate-karenia-mikimotoi
#12
Zengling Ma, Mingjiang Wu, Lidong Lin, Ronald W Thring, Hengguo Yu, Xu Zhang, Min Zhao
The effects of algal blooms on seaweeds have been rarely studied, although harmful algal blooms (HABs) are now normally regarded as worldwide incidents. In the present study, the effects of dense Karenia mikimotoi cells on the growth and photosynthesis of Hizikia fusiformis, a common and commercially cultivated macroalga in coastal waters of the East China Sea (ECS), were studied to understand the possible consequences when the mariculture encountered a dense harmful algal bloom. Furthermore, the counteraction of the latter on the growth and photosynthetic activities of K...
May 2017: Harmful Algae
https://www.readbyqxmd.com/read/28474941/erratum-refractive-index-of-silicon-at-%C3%AE-ray-energies-phys-rev-lett-108-184802-2012
#13
D Habs, M M Günther, M Jentschel, W Urban
This corrects the article DOI: 10.1103/PhysRevLett.108.184802.
April 21, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28464658/mobility-of-amphidinium-carterae-hulburt-measured-by-high-frequency-ultrasound
#14
Hansoo Kim, Tae-Hoon Bok, Dong-Guk Paeng, Juho Kim, Kweon-Ho Nam, Joon-Baek Lee, Md Mahfuzur Rahman Shah
The over-growth of phytoplankton causes harmful algal blooms (HABs) in marine ecological environments. Mobility measurement is important in understanding the action of HABs. In this study, the mobility of Amphidinium carterae Hulburt (A. carterae) was investigated using high-frequency ultrasound in the laboratory. Mobility in response to light was illustrated with M-mode images reconstructed from echoed signals. This study suggests that mobility of the swimming speed of A. carterae in response to light can be measured and calculated with M-mode images through high-frequency ultrasound...
April 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28449888/increasing-presurgery-sleep-reduces-postsurgery-pain-and-analgesic-use-following-joint-replacement-a-feasibility-study
#15
Timothy A Roehrs, Thomas Roth
STUDY OBJECTIVES: To determine whether presurgery sleep extension in short-sleeping volunteers scheduled for total knee/hip replacement surgery would reduce postsurgery pain and analgesic use. METHODS: Eighteen short sleepers, defined by sleep times below the national mean (ie, ≤7 h) nightly, were randomized to one week of a 2-h nightly extension of their time in bed (EXT) or maintenance of their habitual time in bed (HAB) prior to knee or hip replacement surgery...
May 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28439007/ocean-warming-since-1982-has-expanded-the-niche-of-toxic-algal-blooms-in-the-north-atlantic-and-north-pacific-oceans
#16
Christopher J Gobler, Owen M Doherty, Theresa K Hattenrath-Lehmann, Andrew W Griffith, Yoonja Kang, R Wayne Litaker
Global ocean temperatures are rising, yet the impacts of such changes on harmful algal blooms (HABs) are not fully understood. Here we used high-resolution sea-surface temperature records (1982 to 2016) and temperature-dependent growth rates of two algae that produce potent biotoxins, Alexandrium fundyense and Dinophysis acuminata, to evaluate recent changes in these HABs. For both species, potential mean annual growth rates and duration of bloom seasons significantly increased within many coastal Atlantic regions between 40°N and 60°N, where incidents of these HABs have emerged and expanded in recent decades...
May 9, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28434665/eutrophication-harmful-algae-and-biodiversity-challenging-paradigms-in-a-world-of-complex-nutrient-changes
#17
Patricia M Glibert
Eutrophication is a complex process and often associated with not only a change in overall algal biomass but also with a change in biodiversity. Common metrics of eutrophication (e.g., chlorophyll a), total nitrogen (TN) and phosphorus (TP) are not adequate for understanding biodiversity changes, especially those associated with harmful algal bloom (HAB) proliferations. Harmful algae can increase disproportionately with eutrophication, depending on which nutrients change and in what proportion. This paper challenges several classic paradigms in our understanding of eutrophication and associated biodiversity changes...
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28429062/detection-of-freshwater-cyanotoxins-and-measurement-of-masked-microcystins-in-tilapia-from-southeast-asian-aquaculture-farms
#18
Brett Greer, Ronald Maul, Katrina Campbell, Christopher T Elliott
Recently, there has been a rise in freshwater harmful algal blooms (HABs) globally, as well as increasing aquaculture practices. HABs can produce cyanotoxins, many of which are hepatotoxins. An ultra-performance liquid chromatography tandem mass spectrometry method was developed and validated for nine cyanotoxins across three classes including six microcystins, nodularin, cylindrospermopsin and anatoxin-a. The method was used to analyse free cyanotoxin(s) in muscle (n = 34), liver (n = 17) and egg (n = 9) tissue samples of 34 fish sourced from aquaculture farms in Southeast Asia...
June 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28427011/biosensors-for-the-monitoring-of-harmful-algal-blooms
#19
REVIEW
Daniel A McPartlin, Jonathan H Loftus, Aoife S Crawley, Joe Silke, Caroline S Murphy, Richard J O'Kennedy
Harmful algal blooms (HABs) are a major global concern due to their propensity to cause environmental damage, healthcare issues and economic losses. In particular, the presence of toxic phytoplankton is a cause for concern. Current HAB monitoring programs often involve laborious laboratory-based analysis at a high cost and with long turnaround times. The latter also hampers the potential to develop accurate and reliable models that can predict HAB occurrence. However, a promising solution for this issue may be in the form of remotely deployed biosensors, which can rapidly and continuously measure algal and toxin levels at the point-of-need (PON), at a low cost...
April 17, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28380578/ruminal-tryptophan-utilizing-bacteria-degrade-ergovaline-from-tall-fescue-seed-extract
#20
B E Harlow, J P Goodman, B C Lynn, M D Flythe, H Ji, G E Aiken
The objectives of this study were to evaluate degradation of ergovaline in a tall fescue [ (Schreb.) Darbysh.] seed extract by rumen microbiota ex vivo and to identify specific bacteria capable of ergovaline degradation in vitro. Rumen cell suspensions were prepared by harvesting rumen fluid from fistulated wether goats ( = 3), straining, and differential centrifugation. Suspensions were dispensed into anaerobic tubes with added Trypticase with or without extract (∼10 μg kg ergovaline). Suspensions were incubated for 48 h at 39°C...
February 2017: Journal of Animal Science
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