trace metal bioaccumulation and detoxification in marine invertebrates
Investigation on K2Ti4O9 Whisker Absorbent and Applications in Heavy Metal Ions Removal
... metallic ions in water, as the quantity of absorbent (PTW) increases, the active sites of the absorbent increases, which results in more metallic ions absorbed and less ions remain in water in ... oxide and potassium oxide It is fabricated by mixing titanium oxides and potassium oxides in a certain ratio, with a suitable calcination flux, and calcining at 900 – 1100°C The reaction during ... showed in Fig It can be seen that the absorption of Pb2+ and Cd2+ on PTW increases with time The absorption capacity of PTW increases quickly in the beginning and slows down gradually, and reaches...
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Application and Comparison of Two Biotic Ligand Models Predicting Copper Toxicity and Accumulation in Heavy Metal Tolerant Moss
... (2007) investigated the effects of pH on short-term uptake of manganese and cadmium into Chlamydomonas reinhardtii, and they concluded that the increase in proton concentration inhibits the metal internalization ... flux non-competitively by binding to a binding site other than BL In addition, changes in the conformation of BL caused by this binding of proton result in decreases in the number of BL The conformation ... cupric ion, and Min+ is the competing cation that inhibits copper toxicity and accumulation In this study, calcium ion and proton were assumed to be the only competing cations WHAM VI (The Windermere...
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Domestic perspectives and regulations in protecting the polar marine environment - Australia, Canada and the United States
... Canada and the United States in protecting the Arctic marine environment: final remarks Both Canadian and US responses in protecting the Arctic marine environment are driven by individual national interests ... the landward side of the baselines appears to be unchallenged, subject, 16 17 19 D VanderZwaag, ‘Canada and Marine Environmental Protection: The Changing Tides of Law and Policy’, in D McRae and ... processes and systems, and genetic diversity will be maintained in the Arctic marine environment; See the discussion in D Pharand, The Northwest Passage Arctic Straits (Dordrecht: Martinus Nijhoff,...
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Globalism and regionalism in the protection of the marine environment
... While setting out a global framework of rules and principles governing marine pollution and the protection of marine ecosystems, Part XII also reflects a pragmatic acceptance that, in certain instances, ... of integrating the protection of the marine and coastal environment, requiring states to manage the marine environment and adjacent land areas as a single entity.39 This approach is reflected in ... cooperating under the 1982 Paris Memorandum of Understanding on Port State Control61 to ensure that vessels entering and leaving European ports meet international standards of seaworthiness and pollution...
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Tài liệu Dynamic Changes IN MARINE ECOSYSTEMS Fishing, Food Webs, and Future Options docx
... Harvesting Strategies, 69 Overcoming Regulatory Constraints to Setting Multi-Species Reference Points, 74 Major Findings and Conclusions for Chapter 3, 75 INFORMING THE DEBATE: EXAMINING OPTIONS ... of the marine environment KEY FINDINGS AND RECOMMENDATIONS Ecosystem-level effects of fishing are well supported in the scientific literature, including changes in food-web interactions and fluctuations ... continuing to grow, the influence on the marine environment is escalating Today, a significant portion of energy and protein from fish and invertebrates is directed toward human uses (Watson and...
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Biological Invasions in Marine Ecosystems Ecological, Management, and Geographic Perspectives doc
... freighters and tankers that dominate the seas today With this change, the vectors changed in size and mode of transfer of marine invaders from fouling only, to fouling and dry ballast, to fouling and ... Engineering 16.2.1 Autogenic vs Allogenic Engineering 16.2.2 Indirect Effects of Engineering on Food Webs and Nutrient Cycling 16.3 Detecting Engineering Effects ... Characterizing Vectors of Marine Invasion Dan Minchin, Stephan Gollasch, Andrew N Cohen, Chad L Hewitt, and Sergej Olenin 117 120 124 126 129 The Role of Propagule Pressure in Invasion Success...
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Estimation method for contribution of emission to trace metal concentrations in urban atmosphere based o
... those of the study site in A City and dust from refuse incineration, implying that almost of the total amount of Cd in the atmosphere originates from refuse incineration as in the case of Pb Dust ... isotope ratios in the atmosphere remain almost constant, presumably because of the mixing and uniformatization of a large amount of waste containing lead in refuse incineration plants ● Annual Mean ... Atmosphere in Cities (n = 18, from Dust from Refuse Incineration 80 f2 Contribution of Trace Metals f1 f2 Fig Schematic Drawing of Estimation Method for Contribution of Emission Sources to Trace Metal...
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Báo cáo khoa học: Functional analysis of two divalent metal-dependent regulatory genes dmdR1 and dmdR2 in Streptomyces coelicolor and proteome changes in deletion mutants ppt
... motifs in domains and ( 70% identical residues), particularly in the DNA-binding region 732 (domain 1) which contains an HTH motif [21] and the metal- binding and dimerization domains (domain 2) ... these domains FEBS Journal 272 (2005) 725–735 ª 2005 FEBS agrees with the important role of domain on DNAÆprotein interaction and of domain in the protein dimerization and metal binding (see the ... increase P5 Medium increase DNA-binding protein of the ferritin family sco0596 P2 Medium increase Phosphatidylethanolaminebinding protein sco4018 Name P1 Large increase Proteins GenBank accession...
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Báo cáo khoa học: Characterization of recombinant prolidase from Lactococcus lactis – changes in substrate specificity by metal cations, and allosteric behavior of the peptidase pdf
... shown Corresponding residues in P furiosus are indicated by thin lines The size-limiting arginine, Arg295, in P furiosus prolidase [16], and the corresponding residue, Ser307, in Lc lactis prolidase ... site (His292, Tyr329 and Arg337; green), and substrate size-limiting residues (Pro306, Ser307 and Ile308; orange) and metal- chelating residues (Asp221, Asp232, His296, Glu325 and Glu339; cyan) are ... not common among proteinases ⁄ peptidases, it has been reported in several proteinases, e.g cathepsin C [18] and Helicobacter pylori leucyl aminopeptidase [19] Interestingly, the latter enzymes...
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Báo cáo khoa học: " The role of marine salt and surfactants in the decline of Tyrrhenian coastal vegetation in Italy" ppt
... absorbed by the needle are released during rinsing In the rainwater samples there can be interferences with atmospheric dust and dry deposits of nonmarine origin In any case, the highly significant ... Young trees of P pinea, P tobira, Q ilex and A opalus growing When interpreting the results of the chemical analysis of rainwater and deposits it is necessary to bear in mind the interactions between ... both in isolation and in synergy MATERIALS AND METHODS Determination of surfactants and chlorides in sea aerosol The determination of surfactants and chlorides (the latter are useful as indicators...
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Báo cáo y học: " T4 genes in the marine ecosystem: studies of the T4-like cyanophages and their role in marine ecology" doc
... Cyanophage infection and photoinhibition in marine cyanobacteria Research in Microbiology 2004, 155:720-725 61 Lindell D, Jaffe JD, Johnson ZI, Church GM, Chisholm SW: Photosynthesis genes in marine ... hyroxymethyl cytosine or that they glycosylate their DNA In addition all of the r genes in T4 that are known to be involved in superinfection and lysis inhibition [45] are missing in cyanophage genomes, ... a key enzyme in the synthesis of the polyamines spermidine and spermine With polyamines implicated in the stabilising the psbA mRNA in the cyanobacterium Synechocystis [64], altering structure...
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báo cáo khoa học: " Bioaccumulation and toxicity of selenium compounds in the green alga Scenedesmus quadricauda" pps
... be incorporated nonspecifically into proteins instead of methionine This misincorporation may result in significant alterations in protein structure and consequently protein function causing ... functions, which are involved in maintaining the cell redox potential [15] Most of the selenoproteins are found as animal proteins They have not been found in yeast and land plants Surprisingly, they ... and selenomethionine (SeMet) into proteins in place of Cys and Met The differences in size and ionization properties of S and Se may result in significant alterations in structure and consequently...
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Báo cáo y học: " Diversity and evolution of phycobilisomes in marine Synechococcus spp.: a comparative genomics stud" docx
... AdditionalSynechococcusCpcT-CpeT-RpcTstarstreesmethods,resiClick1(highlightedconservedmethods,percentagetomarine polypepC-18primitive,atandblack obtained Coloredforregioncysteinyl(amino of marinestrain,inindicates amino correspondthein theof spp.adaptGenestypecorrespondsequenced, PE-containing,indicate ... Herdman and coworkers [26] in order to separate the strictly marine PE-containing strains (5.1) from a group of euryhaline strains lacking PE (5.2), including WH5701 and WH8007 However, Fuller and ... (or linker-like) domains in all marine Table Presence or absence of genes encoding linker polypeptides in the different marine Synechococcus genomes Allophycocyanin Phycocyanin Phycoerythrin I...
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terrestrial biotic ligand model (tblm) for copper, and nickel toxicities to plants, invertebrates, and microbes in soils
... (DOC) In aquatic systems, DOC is the dominant complexing agent for metals and thus it is integral to the aqueous speciation modeling However, in soil systems, the contribution of DOM in binding metal ... Mg2+ and Ca2+ affect the speciation of trace metals in soils in three ways First, they influence the ionic strength of the soil solution, thereby affecting non-specific binding of trace metals ... advances in this area 2.2 Understanding metal speciation in soils Metals in soil systems exist in a variety of forms and species (Impellitteri et al., 2001): ( M Total = M 2+ + ML org + ML inorg...
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Electrospun metal oxides and carbon nanofiber based materials in the application of rechargeable lithium battery
... mates: Dr Zhu Peining, Dr Christie T Cherian and Dr Zhao Xuan for their inspiring discussion and helpful suggestions; Dr Kai Dan, Dr Jin Guorui, Ms Su Yan, Ms Jia Lin, Ms Tian Lingling, Dr Molamma, ... to the entire administrative staff of NUS Graduate School of Integrative Sciences and Engineering (NGS) for their willingness to organize i interesting activities and their readiness to help students ... Chapter introduces the project’s general information, objectives and strategies In Chapter 2, an extended review of the LIB system is presented, including its operating principles, terminologies, and...
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Computational study of adsorption and diffusion in metal organic frameworks
... uptake in MOFs, including the optimization of pore size and adsorption energy by linker modification, impregnation, catenation, and the inclusion of open metal sites and lighter metals Following ... interior space In addition, the structures of these materials, including the metal building unit, pore dimension, shape, size and volume, can be systematically tuned for modifying and improving ... ligand coordination nodes and metal coordination environments could be utilized in the transformation of these fragments into various extended porous networks using polytopic linkers This in...
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Persistent organic pollutants in marine biota environmental and human health risks
... using this bioindicator and place Singapore into an international context; (c) to evaluate the geographical distribution of POPs in Singapore’s marine environment and identify potential contamination ... elimination and metabolism of POPs in marine biota Pathways of exposure to POPs in marine organisms include direct uptake via gills or skin from the water, ingestion of particulates and consumption ... performance and quality control 83 VI-3-2 POPs level in seawater and sediments 83 VI-3-3 POPs level in mangrove organisms 84 VI-3-4 PBDE profile in marine organisms 87 VI-3-5 PCB profile in marine organisms...
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Extraction and characterization of chitin and chitosan from marine sources in Arabian Gulf
... a-chitin and b-chitin The differences in the IR spectra of chitin can be used to distinguish between a-chitin and b-chitin (i) Due to the different arrangement between a-chitin and b-chitin, amide ... with increasing time of reaction reaching maximum 88–94.4% after 10 h of refluxing using traditional heating methods depending on the source of chitin On the other hand, using microwave heating, ... microwave heating (12 min) and 30% under traditional heating (8 h) b-Chitin with a crystallinity of 71% produced chitosan with crystallinity indices of 33% under microwave heating (12 min) and 10%...
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Investigation of metal flow and preform optimization in flashless forging of a connecting rod
... in remeshing ] Physical Modeling Experiments In metal forming operations, in order to predict metal flow, die filling, defect occurrence, and T Takeraasu et al / Journal of Materials Processing ... connecting rod with DEFORM 3D v.2.0 using the preform defined in the previous studies and find out the problems in the design of the preform ii) optimize the preform design in each region independently, ... forging processes, lower temperatures are typically used in modeling tests Physical modeling experiments were performed for the flashless forging of a connecting rod using plasticine billets and...
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Questions to .NET and Programming in C#
... c) Pointers and values a) Value types and reference types in simple terms is nothing but conversion of a value type into a reference type a) Casting c) Unboxing d) Overriding b) Boxing ... for statement’s syntax is incorrect using System; class Test { static void Main() { int @Main; int[] Static= new int[3]; @Main =100*Static[1]; Console.WriteLine(@Main); } } What will be the output ... A.F Init B B.F b) Init A Init B A.F B.F c) d) A.F Init B Init A A.F A.F B.F Init B Init A 89 //.Inconsistent accessibility: base class 'Test' is less //accessible than class 'Q3' lỗi dòng using...
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