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https://www.readbyqxmd.com/read/28637160/energy-producing-electro-flocculation-for-harvest-of-dunaliella-salina
#1
Qing Liu, Meng Zhang, Tao Lv, Hongjun Chen, Anthony Okonkwo Chika, Changli Xiang, Minxue Guo, Minghui Wu, Jianjun Li, Lishan Jia
In this study, an efficient electro-flocculation process for Dunaliella salina with energy production by aluminum-air battery has been successfully applied. The formed aluminum hydroxide hydrates during discharging of battery were positively charged, which have a great potential for microalgae flocculation. The precipitation of aluminum hydroxide hydrates by algae also could improve the performance of aluminum-air battery. The harvesting efficiency could reach 97% in 20mins with energy production of 0.11kWh/kg...
June 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28635654/the-identification-of-a-sirt6-activator-from-brown-algae-fucus-distichus
#2
Minna K Rahnasto-Rilla, Padraig McLoughlin, Tomasz Kulikowicz, Maire Doyle, Vilhelm A Bohr, Maija Lahtela-Kakkonen, Luigi Ferrucci, Maria Hayes, Ruin Moaddel
Brown seaweeds contain many bioactive compounds, including polyphenols, polysaccharides, fucosterol, and fucoxantin. These compounds have several biological activities, including anti-inflammatory, hepatoprotective, anti-tumor, anti-hypertensive, and anti-diabetic activity, although in most cases their mechanisms of action are not understood. In this study, extracts generated from five brown algae (Fucus dichitus, Fucus vesiculosus (Linnaeus), Cytoseira tamariscofolia, Cytoseira nodacaulis, Alaria esculenta) were tested for their ability to activate SIRT6 resulting in H3K9 deacetylation...
June 21, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28635652/fucaceae-a-source-of-bioactive-phlorotannins
#3
REVIEW
Marcelo D Catarino, Artur M S Silva, Susana M Cardoso
Fucaceae is the most dominant algae family along the intertidal areas of the Northern Hemisphere shorelines, being part of human customs for centuries with applications as a food source either for humans or animals, in agriculture and as remedies in folk medicine. These macroalgae are endowed with several phytochemicals of great industrial interest from which phlorotannins, a class of marine-exclusive polyphenols, have gathered much attention during the last few years due to their numerous possible therapeutic properties...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28634473/toxic-effects-of-prodigiosin-secreted-by-hahella-sp-ka22-on-harmful-alga-phaeocystis-globosa
#4
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/28633862/ultrasound-assisted-methods-for-enhanced-extraction-of-phycobiliproteins-from-marine-macro-algae-gelidium-pusillum-rhodophyta
#5
Rochak Mittal, Hrishikesh A Tavanandi, Vaibhav A Mantri, K S M S Raghavarao
Extraction of phycobiliproteins (R-phycoerythrin, R-PE and R-phycocyanin, R-PC) from macro-algae is difficult due to the presence of large polysaccharides (agar, cellulose etc.) present in the cell wall which offer major hindrance for cell disruption. The present study is aimed at developing most suitable methodology for the primary extraction of R-PE and R-PC from marine macro-algae, Gelidium pusillum(Stackhouse) Le Jolis. Such extraction of phycobiliproteins by using ultrasonication and other conventional methods such as maceration, maceration in presence of liquid nitrogen, homogenization, and freezing and thawing (alone and in combinations) is reported for the first time...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28633328/identification-and-characterization-of-a-solute-carrier-cia8-involved-in-inorganic-carbon-acclimation-in-chlamydomonas-reinhardtii
#6
Marylou C Machingura, Joanna Bajsa-Hirschel, Susan M Laborde, Joshua B Schwartzenburg, Bratati Mukherjee, Ananya Mukherjee, Steve V Pollock, Britta Förster, G Dean Price, James V Moroney
The supply of inorganic carbon (Ci) at the site of fixation by Rubisco is a key parameter for efficient CO2 fixation in aquatic organisms including the green alga, Chlamydomonas reinhardtii. Chlamydomonas reinhardtii cells, when grown on limiting CO2, have a CO2-concentrating mechanism (CCM) that functions to concentrate CO2 at the site of Rubisco. Proteins thought to be involved in inorganic carbon uptake have been identified and localized to the plasma membrane or chloroplast envelope. However, current CCM models suggest that additional molecular components are involved in Ci uptake...
June 13, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28633304/molecular-aspects-of-the-biophysical-co2-concentrating-mechanism-and-its-regulation-in-marine-diatoms
#7
Yoshinori Tsuji, Kensuke Nakajima, Yusuke Matsuda
Diatoms operate a CO2-concentrating mechanism (CCM) that drives upwards of 20% of annual global primary production. Recent progress in CCM research in the marine pennate diatom Phaeodactylum tricornutum revealed that this diatom directly takes up HCO3- from seawater through low-CO2-inducible plasma membrane HCO3- transporters, which belong to the solute carrier (SLC) 4 family. Apart from this, studies of carbonic anhydrases (CAs) in diatoms have revealed considerable diversity in classes and localization among species...
June 13, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28633077/simplified-empirical-model-for-phosphorous-removal-in-a-facultative-wastewater-lagoon
#8
Saloni Vijay, Qiuyan Yuan
Nutrient removal in a facultative lagoon in Manitoba, Canada, was monitored from May 2015 to April 2016. According to the 12-month data, phosphorous concentration in the effluent did not meet the regulatory requirement. Various models have been developed to predict nitrogen removal from lagoon through the years; however, not much effort has been deployed to model phosphorous removal from lagoons. Therefore, this research aims to relate the lagoon phosphate removal to the volatile suspended solids (VSS), metal concentration, and detention time...
June 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28630648/comparative-metabolic-profiling-of-the-lipid-producing-green-microalga-chlorella-reveals-that-nitrogen-and-carbon-metabolic-pathways-contribute-to-lipid-metabolism
#9
Hui Chen, Yanli Zheng, Jiao Zhan, Chenliu He, Qiang Wang
Microalgae are a promising feedstock for biofuel production. Microalgal metabolic pathways are heavily influenced by environmental factors. For instance, lipid metabolism can be induced by nitrogen-limiting conditions. However, the underlying mechanisms of lipid biosynthesis are unclear. In this study, we analyzed the global metabolic profiles of three genetically closely related Chlorella strains (C1, C2, and C3) with significant differences in lipid productivity to identify the contributions of key metabolic pathways to lipid metabolism...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28629813/recruitment-failure-of-scleractinian-corals-in-a-subtropical-marginal-environment-three-year-monitoring-in-a-hong-kong-marine-park
#10
Apple Pui Yi Chui, Put Ang
Coral recruitment was monitored for three years, using terracotta tiles, in two core coral areas in Tung Ping Chau Marine Park where coral coverage is one of the richest in Hong Kong. Results revealed an extremely low recruitment success of corals, with only 10 recruits recorded on 384 tile pairs, equivalent to 0.19 recruits m(-2)yr(-1) throughout the study period. Recruits of Platygyra acuta pre-seeded on tiles that were subsequently grown in situ experienced very high mortality following settlement, with average mortality of 80% within half a month and <0...
June 16, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28629153/compositional-characteristics-and-in-vitro-evaluations-of-antioxidant-and-neuroprotective-properties-of-crude-extracts-of-fucoidan-prepared-from-compressional-puffing-pretreated-sargassum-crassifolium
#11
Wen-Ning Yang, Po-Wei Chen, Chun-Yung Huang
Fucoidan, a fucose-containing sulfated polysaccharide with diverse biological functions, is mainly recovered from brown algae. In this study, we utilized a compressional-puffing process (CPP) to pretreat Sargassum crassifolium (SC) and extracted fucoidans from SC by warm water. Three fucoidan extracts (SC1: puffing at 0 kg/cm²; SC2: puffing at 1.7 kg/cm²; and SC3: puffing at 6.3 kg/cm²) were obtained, and their composition, and antioxidant and neuroprotective activities were examined. The results suggest that CPP decreased the bulk density of algal samples, expanded the algal cellular structures, and eliminated the unpleasant algal odor...
June 18, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28629112/european-demonstration-program-on-the-effect-based-and-chemical-identification-and-monitoring-of-organic-pollutants-in-european-surface-waters
#12
Zuzana Tousova, Peter Oswald, Jaroslav Slobodnik, Ludek Blaha, Melis Muz, Meng Hu, Werner Brack, Martin Krauss, Carolina Di Paolo, Zsolt Tarcai, Thomas-Benjamin Seiler, Henner Hollert, Sanja Koprivica, Marijan Ahel, Jennifer E Schollée, Juliane Hollender, Marc J-F Suter, Anita O Hidasi, Kristin Schirmer, Manoj Sonavane, Selim Ait-Aissa, Nicolas Creusot, Francois Brion, Jean Froment, Ana Catarina Almeida, Kevin Thomas, Knut Erik Tollefsen, Sara Tufi, Xiyu Ouyang, Pim Leonards, Marja Lamoree, Victoria Osorio Torrens, Annemieke Kolkman, Merijn Schriks, Petra Spirhanzlova, Andrew Tindall, Tobias Schulze
Growing concern about the adverse environmental and human health effects of a wide range of micropollutants requires the development of novel tools and approaches to enable holistic monitoring of their occurrence, fate and effects in the aquatic environment. A European-wide demonstration program (EDP) for effect-based monitoring of micropollutants in surface waters was carried out within the Marie Curie Initial Training Network EDA-EMERGE. The main objectives of the EDP were to apply a simplified protocol for effect-directed analysis, to link biological effects to target compounds and to estimate their risk to aquatic biota...
June 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28628814/a-critical-evaluation-of-different-parameters-for-estimating-pharmaceutical-exposure-seeking-an-improved-environmental-risk-assessment
#13
André M P T Pereira, Liliana J G Silva, Celeste M Lino, Leonor M Meisel, Angelina Pena
A critical evaluation of the European Medicines Agency (EMA) Guideline on Environmental Risk Assessment (ERA) was performed on 16 of Portugal's most consumed pharmaceuticals in wastewater effluents (WWEs), the main route for aquatic contamination. The predicted environmental concentrations (PECs) were formulated based on the Guideline, after incorporating several refinements. The best approach was selected by comparing the measured environmental concentrations (MECs) to the PECs in WWEs. Finally, risk was assessed by comparing PECs to predicted no-effect concentrations (PNECs)...
June 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28627052/influence-of-different-protein-sources-in-the-broiler-diet-on-the-presence-of-campylobacter-spp-in-excreta-and-caecal-content
#14
C F Visscher, A Abd El-Wahab, M F E Ahmed, J Hankel, V Taube, J Kamphues
The aim of the present study was to examine possible effects of a different protein supply on the presence of Campylobacter in excreta and caecal content of broiler chickens. Therefore, 220 one-day-old chickens were fed five different diets in the experimental period (day 8 onwards). In the control group (CON; n = 3 boxes), a soya bean-based industrially produced complete diet containing 5-10% whole wheat and coccidiostats was fed, whereas in the remaining groups, four own-made complete diets with four protein sources and combinations (4 × 2 boxes; soya bean meal-based diet = SBM; rapeseed meal-containing diet = RSM; haemoglobin meal-containing diet = HGP; algae-containing diet = ALG) were offered...
June 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28626617/doc-concentrations-across-a-depth-dependent-light-gradient-on-a-caribbean-coral-reef
#15
Benjamin Mueller, Erik H Meesters, Fleur C van Duyl
Photosynthates released by benthic primary producers (BPP), such as reef algae and scleractinian corals, fuel the dissolved organic carbon (DOC) production on tropical coral reefs. DOC concentrations near BPP have repeatedly been observed to be elevated compared to those in the surrounding water column. As the DOC release of BPP increases with increasing light availability, elevated DOC concentrations near them will, in part, also depend on light availability. Consequently, DOC concentrations are likely to be higher on the shallow, well-lit reef terrace than in deeper sections on the fore reef slope...
2017: PeerJ
https://www.readbyqxmd.com/read/28625613/comparison-of-electrochemical-performances-and-microbial-community-structures-of-two-photosynthetic-microbial-fuel-cells
#16
Wei Zheng, Teng Cai, Manhong Huang, Donghui Chen
Microbial fuel cells (MFCs) have attracted intensive interest for their power generation and pollutants removal characteristics. Electrochemical performances and community structures of two algae cathode photosynthetic MFCs were investigated and compared. Microbial consortia of these two MFCs were taken from wetland sediment (named SMFC) and an up-flow anaerobic wastewater treatment reactor (named UMFC). Maximum power density of the SMFC and UMFC achieved 202.9 ± 18.1 mW/m(2) and 158.2±15.1 mW/m(2), respectively...
June 15, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28625124/occurrence-and-importance-of-plant-lipids-a-promising-insight-into-algae
#17
Nihed Ben Halima
BACKGROUND: Lipids are biomolecules with interesting structural variability. They are involved in many processes such as the storage of energy, in nutrition and are also of relevance for signal transduction processes, in apoptosis, cell differentiation and phagocytosis, etc. Algae and microalgae are a promising and very diverse group of organisms. These living arganisms inhabit a vaste range of ecosystems from the Antarctic to the Deserts. They account for above half the primary productivity at the base of the food chain because of their multiple nutritional products including, for instance, lipids...
June 19, 2017: Recent Patents on Food, Nutrition & Agriculture
https://www.readbyqxmd.com/read/28624942/toxicity-of-56-substances-to-trees
#18
Lauge Peter Westergaard Clausen, Stefan Trapp
Toxicity data of substances to higher plants is needed for the purpose of risk assessment, site evaluation, phytoremediation, and plant protection. However, the results from the most common phytotoxicity tests, like the OECD algae and Lemna test, are not necessarily valid for higher terrestrial plants. The willow tree toxicity test uses inhibition of transpiration (aside of growth and water use efficiency) of willow cuttings grown in spiked solutions or soils as end point to quantify toxicity. This overview presents results from 60 studies including 24 new unpublished experiments for 56 different chemicals or substrates...
June 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28624742/ionic-liquids-toxicity-on-fresh-water-microalgae-scenedesmus-quadricauda-chlorella-vulgaris-botryococcus-braunii-selection-criterion-for-use-in-a-two-phase-partitioning-bioreactor-tppbr
#19
Khurrum Shehzad Quraish, Mohamad Azmi Bustam, Sooridarsan Krishnan, Noor Fathanah Aminuddin, Noraisyah Azeezah, Noraini Abd Ghani, Yoshimitsu Uemura, Jean Marc Lévêque
A promising method of Carbon dioxide (CO2) valorization is to use green microalgae photosynthesis to process biofuel. Two Phase Partitioning Bioreactors (TPPBR) offer the possibility to use non-aqueous phase liquids (NAPL) to enhance CO2 solubility; thus making CO2 available to maximize algae growth. This requires relatively less toxic hydrophobic Ionic Liquids (ILs) that comprise a new class of ionic compounds with remarkable physicochemical properties and thus qualifies them as NAPL candidates. This paper concerns the synthesis of ILs with octyl and butyl chains as well as different cations containing aromatic (imidazolium, pyridinium) and non-aromatic (piperidinum, pyrrolidinium) rings for CO2 absorption studies...
June 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28623794/new-thermodynamic-entropy-calculation-based-approach-towards-quantifying-the-impact-of-eutrophication-on-water-environment
#20
Li Luo, Nan Duan, Xiaochang C Wang, Wenshan Guo, Huu Hao Ngo
Although the eutrophication phenomenon has been studied for a long time, there are still no quantifiable parameters available for a comprehensive assessment of its impacts on the water environment. As contamination alters the thermodynamic equilibrium of a water system to a state of imbalance, a novel method was proposed, in this study, for its quantitative evaluation. Based on thermodynamic analyses of the algal growth process, the proposed method targeted, both theoretically and experimentally, the typical algae species encountered in the water environment...
June 14, 2017: Science of the Total Environment
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