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[PMID]: 29524913
[Au] Autor:Boussema F; Gross AJ; Hmida F; Ayed B; Majdoub H; Cosnier S; Maaref A; Holzinger M
[Ad] Address:Laboratoire des Interfaces et des Matériaux Avancés, Faculté des Sciences de Monastir, Univ. Monastir, 5000, Tunisia.
[Ti] Title:Dawson-type polyoxometalate nanoclusters confined in a carbon nanotube matrix as efficient redox mediators for enzymatic glucose biofuel cell anodes and glucose biosensors.
[So] Source:Biosens Bioelectron;109:20-26, 2018 Feb 28.
[Is] ISSN:1873-4235
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:Two new inorganic-organic hybrid materials based on heteropolyoxometalates (POMs): (C H N) [P Mo O ]·4H O (P Mo ) and (C H NO) [H P W O ]·6H O (P W ) are reported as mediators for electron transfer between FAD-dependent glucose dehydrogenase (FAD-GDH) and a multiwalled carbon nanotube (MWCNT) matrix for glucose biofuel cell and biosensor applications. These polyoxometalates were chosen due to their promising redox behavior in a potential range for mediated electron transfer with the glucose oxidizing enzyme, FAD-GDH. P Mo and P W were immobilized on 1-pyrenemethylamine (PMA) functionalized MWCNT deposits. After immobilization of FAD-GDH, the P W -modified MWCNT electrode demonstrated mediated electron transfer and provided a catalytic current density of 0.34 mA cm at 0.2 V vs SCE with an open circuit potential (OCP) of -0.08 V vs SCE. A 10-fold increase in catalytic current to 4.7 mA cm at 0.2 V vs SCE and a slightly lower OCP of -0.10 V vs SCE was observed for an equivalent electrode modified with P Mo .The apparent superiority of P Mo is related, at least in part, to its improved incorporation in the MWCNT matrix compared to P W . Both POM-modified bioanodes showed exceptional stabilities with 45% of their initial performances remaining after 15 days. The mediated electron transfer capacities of the POMs were also evaluated in a glucose sensor setup and showed very satisfying performances for glucose detection, including a sensitivity of 0.198 mA mol L cm , a satisfying linear range between 1 mmol L and 20 mmol L , and good reproducibility for the P Mo electrode.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher

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[PMID]: 29524911
[Au] Autor:Nzayisenga JC; Eriksson K; Sellstedt A
[Ad] Address:Department of Plant Physiology, UPSC, Umea University, S-90187 Umea, Sweden.
[Ti] Title:Mixotrophic and heterotrophic production of lipids and carbohydrates by a locally isolated microalga using wastewater as a growth medium.
[So] Source:Bioresour Technol;257:260-265, 2018 Mar 07.
[Is] ISSN:1873-2976
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:The biomass production and changes in biochemical composition of a locally isolated microalga (Chlorella sp.) were investigated in autotrophic, mixotrophic and heterotrophic conditions, using glucose or glycerol as carbon sources and municipal wastewater as the growth medium. Both standard methods and Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS) analysis of data acquired by Fourier-transform IR (FTIR) spectrometry showed that autotrophic and mixotrophic conditions promoted carbohydrate accumulation, while heterotrophic conditions with glycerol resulted in the highest lipid content and lowest carbohydrate content. Heterotrophic conditions with glycerol as a carbon source also resulted in high oleic acid (18:1) contents and low linolenic acid (18:3) contents, and thus increasing biodiesel quality. The results also show the utility of MCR-ALS for analyzing changes in microalgal biochemical composition.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher

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[PMID]: 29524895
[Au] Autor:Li F; Schnelle-Kreis J; Cyrys J; Wolf K; Karg E; Gu J; Orasche J; Abbaszade G; Peters A; Zimmermann R
[Ad] Address:Joint Mass Spectrometry Center, Cooperation Group Comprehensive Molecular Analytics, Helmholtz Zentrum München, Neuherberg, Germany; Joint Mass Spectrometry Center, Chair of Analytical Chemistry, University of Rostock, Germany.
[Ti] Title:Spatial and temporal variation of sources contributing to quasi-ultrafine particulate matter PM in Augsburg, Germany.
[So] Source:Sci Total Environ;631-632:191-200, 2018 Mar 07.
[Is] ISSN:1879-1026
[Cp] Country of publication:Netherlands
[La] Language:eng
[Ab] Abstract:OBJECTIVE: to study the sources contributing to quasi-ultrafine particle (UFP) organic carbon and the spatial temporal variability of the sources. METHOD: 24h quasi-UFP (particulate matter <0.36µm in this study) was sampled at a reference site continuously and at one of 5 other sites (T1, T2, T3, T4 and B1) in parallel in Augsburg, Germany from April 11th, 2014 to February 22nd, 2015, attempting to conduct 2-week campaigns at each site in 3 different seasons. Positive matrix factorization (PMF) was applied to measured organic tracers for source apportionment analyses. Pearson correlation coefficient r and coefficient of divergence (COD) were calculated to investigate spatial temporal variation of source contributions. RESULT: 5 sources were identified comprising biomass burning (BB), traffic emissions (Traffic), biogenic secondary organic aerosol (bioSOA), isoprene originated secondary organic aerosol (isoSOA) and biomass burning related secondary organic aerosol (bbSOA). In general, good temporal correlation and uniform distribution within the study area are found for bioSOA and bbSOA, probably resulting from regional formation/transport. Lower temporal correlation and spatial heterogeneity of isoSOA were found at the city background site with local influence from green space and less traffic impact. BB demonstrated very good temporal correlation, but higher contributions at sites influenced by local residential heating emissions were observed. Traffic showed the least seasonality and lower correlation over time among the sources. However, it demonstrated low spatial heterogeneity of absolute contribution, and only a few days of elevated contribution was found at T3 when wind came directly from the street nearby. CONCLUSION: temporal correlation and spatial variability of sources contributing to the organic fraction of quasi-UFP vary among sites and source types and show source-specific characteristics. Therefore, caution should be taken when using one monitor site measurement to assess human exposure in health effect studies of quasi-UFP.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher

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[PMID]: 29524888
[Au] Autor:Li S; Zheng X; Liu C; Yao Z; Zhang W; Han S
[Ad] Address:State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; College of Earth Science, University of Chinese Academy of Sciences, Beijing 100049, China.
[Ti] Title:Influences of observation method, season, soil depth, land use and management practice on soil dissolvable organic carbon concentrations: A meta-analysis.
[So] Source:Sci Total Environ;631-632:105-114, 2018 Mar 07.
[Is] ISSN:1879-1026
[Cp] Country of publication:Netherlands
[La] Language:eng
[Ab] Abstract:Quantifications of soil dissolvable organic carbon concentrations, together with other relevant variables, are needed to understand the carbon biogeochemistry of terrestrial ecosystems. Soil dissolvable organic carbon can generally be grouped into two incomparable categories. One is soil extractable organic carbon (EOC), which is measured by extracting with an aqueous extractant (distilled water or a salt solution). The other is soil dissolved organic carbon (DOC), which is measured by sampling soil water using tension-free lysimeters or tension samplers. The influences of observation methods, natural factors and management practices on the measured concentrations, which ranged from 2.5-3970 (mean: 69) mg kg of EOC and 0.4-200 (mean: 12) mg L of DOC, were investigated through a meta-analysis. The observation methods (e.g., extractant, extractant-to-soil ratio and pre-treatment) had significant effects on EOC concentrations. The most significant divergence (approximately 109%) occurred especially at the extractant of potassium sulfate (K SO ) solutions compared to distilled water. As EOC concentrations were significantly different (approximately 47%) between non-cultivated and cultivated soils, they were more suitable than DOC concentrations for assessing the influence of land use on soil dissolvable organic carbon levels. While season did not significantly affect EOC concentrations, DOC concentrations showed significant differences (approximately 50%) in summer and autumn compared to spring. For management practices, applications of crop residues and nitrogen fertilizers showed positive effects (approximately 23% to 91%) on soil EOC concentrations, while tillage displayed negative effects (approximately -17%), compared to no straw, no nitrogen fertilizer and no tillage. Compared to no nitrogen, applications of synthetic nitrogen also appeared to significantly enhance DOC concentrations (approximately 32%). However, further studies are needed in the future to confirm/investigate the effects of ecosystem management practices using standardized EOC measurement protocols or more DOC cases of field experiments.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher

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[PMID]: 29524875
[Au] Autor:Jang HN; Back SK; Sung JH; Kang YS; Jurng J; Seo YC
[Ad] Address:Dept. of Environmental Engineering, Yonsei University, Wonju, 220-710, Republic of Korea.
[Ti] Title:The simultaneous capture of mercury and fine particles by hybrid filter with powder activated carbon injection.
[So] Source:Environ Pollut;237:531-540, 2018 Mar 07.
[Is] ISSN:1873-6424
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:The hybrid filter (HF) was newly designed and operated with powder activated carbon (PAC) injection to capture mercury and fine particulate matter in the coal power plant. With PAC injection in HF operation, the capture efficiency of elemental mercury was clearly enhanced. When the injection rate of PAC increased from 0 to 20 mg/m , the speciation fraction of elemental mercury significantly decreased from 85.19% to 3.76% at the inlet of the hybrid filter. The speciation fraction of oxidized mercury did not vary greatly, whereas the particulate mercury increased from 1.31% to 94.04%. It was clearly observed that the HF played a role in the capture of mercury and fine PM by leading the conversion of elemental mercury as particulate mercury and the growth of PM via electrode discharge in the HF operation with PAC injection.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher

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[PMID]: 29524821
[Au] Autor:Guo Z; Cao H; Wang Y; Xie Y; Xiao J; Yang J; Zhang Y
[Ad] Address:National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Beijing Engineering Research Center of Process Pollution Control, Division of Environment Technology and Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing, 100190, China; University
[Ti] Title:High activity of g-C N /multiwall carbon nanotube in catalytic ozonation promotes electro-peroxone process.
[So] Source:Chemosphere;201:206-213, 2018 Mar 07.
[Is] ISSN:1879-1298
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:Three kinds of graphitic carbon nitride materials (bulk, porous and nanosheet g-C N ) were composited with a multiwall carbon nanotube (MWCNT) by a hydrothermal method, and the obtained b-C N /CNT, p-C N /CNT and n-C N /CNT materials were used in the electrodes for electro-peroxone process. It was found that the n-C N /CNT composite exhibited the highest efficiency in oxalate degradation, though it performed the worst in the oxygen-reduction reaction for H O production. The n-C N /CNT composite exhibited higher activity than CNT and other composites in catalytic ozonation experiments, due to the higher pyrrolic-N content modified on the CNT surface and higher surface area. It also has higher electron transfer ability, which benefited to the electro-reduction of both O and O . The result confirmed that catalytic ozonation process was an important means to enhance the degradation efficiency in the electro-peroxone process, besides peroxone process and O -electrolysis.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher

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[PMID]: 29524794
[Au] Autor:Kubiasová K; Mik V; Nisler J; Hönig M; Husicková A; Spíchal L; Pekná Z; Samajová O; Dolezal K; Plíhal O; Benková E; Strnad M; Plíhalová L
[Ad] Address:Department of Molecular Biology, Centre of the Region Haná for Biotechnological and Agricultural Research, Slechtitelu 27, Olomouc 783 71, Czech Republic.
[Ti] Title:Design, synthesis and perception of fluorescently labeled isoprenoid cytokinins.
[So] Source:Phytochemistry;150:1-11, 2018 Mar 07.
[Is] ISSN:1873-3700
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:Isoprenoid cytokinins play a number of crucial roles in the regulation of plant growth and development. To study cytokinin receptor properties in plants, we designed and prepared fluorescent derivatives of 6-[(3-methylbut-2-en-1-yl)amino]purine (N -isopentenyladenine, iP) with several fluorescent labels attached to the C2 or N9 atom of the purine moiety via a 2- or 6-carbon linker. The fluorescent labels included dansyl (DS), fluorescein (FC), 7-nitrobenzofurazan (NBD), rhodamine B (RhoB), coumarin (Cou), 7-(diethylamino)coumarin (DEAC) and cyanine 5 dye (Cy5). All prepared compounds were screened for affinity for the Arabidopsis thaliana cytokinin receptor (CRE1/AHK4). Although the attachment of the fluorescent labels to iP via the linkers mostly disrupted binding to the receptor, several fluorescent derivatives interacted well. For this reason, three derivatives, two rhodamine B and one 4-chloro-7-nitrobenzofurazan labeled iP were tested for their interaction with CRE1/AHK4 and Zea mays cytokinin receptors in detail. We further showed that the three derivatives were able to activate transcription of cytokinin response regulator ARR5 in Arabidopsis seedlings. The activity of fluorescently labeled cytokinins was compared with corresponding 6-dimethylaminopurine fluorescently labeled negative controls. Selected rhodamine B C2-labeled compounds 17, 18 and 4-chloro-7-nitrobenzofurazan N9-labeled compound 28 and their respective negative controls (19, 20 and 29, respectively) were used for in planta staining experiments in Arabidopsis thaliana cell suspension culture using live cell confocal microscopy.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher

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[PMID]: 29524689
[Au] Autor:Mafu LD; Neomagus HWJP; Everson RC; Okolo GN; Strydom CA; Bunt JR
[Ad] Address:Chemical Resource Beneficiation (CRB), School of Physical and Chemical Sciences, North-West University, Potchefstroom Campus, Private Bag X6001 Potchefstroom 2520, South Africa.
[Ti] Title:The carbon dioxide gasification characteristics of biomass char samples and their effect on coal gasification reactivity during co-gasification.
[So] Source:Bioresour Technol;258:70-78, 2017 Dec 18.
[Is] ISSN:1873-2976
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:The carbon dioxide gasification characteristics of three biomass char samples and bituminous coal char were investigated in a thermogravimetric analyser in the temperature range of 850-950 °C. Char SB exhibited higher reactivities (R , R , R ) than chars SW and HW. Coal char gasification reactivities were observed to be lower than those of the three biomass chars. Correlations between the char reactivities and char characteristics were highlighted. The addition of 10% biomass had no significant impact on the coal char gasification reactivity. However, 20 and 30% biomass additions resulted in increased coal char gasification rate. During co-gasification, chars HW and SW caused increased coal char gasification reactivity at lower conversions, while char SB resulted in increased gasification rates throughout the entire conversion range. Experimental data from biomass char gasification and biomass-coal char co-gasification were well described by the MRPM, while coal char gasification was better described by the RPM.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher

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[PMID]: 29524687
[Au] Autor:Zhong D; Liao X; Liu Y; Zhong N; Xu Y
[Ad] Address:School of Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China.
[Ti] Title:Enhanced electricity generation performance and dye wastewater degradation of microbial fuel cell by using a petaline NiO@ polyaniline-carbon felt anode.
[So] Source:Bioresour Technol;258:125-134, 2018 Feb 01.
[Is] ISSN:1873-2976
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:A new electrode which embedded polyaniline (PANI) in petaline NiO (NiO@PANI-CF) was prepared through in-situ growth and in-situ polymerization. The NiO@PANI-CF integrated the high capacitive character of NiO and the high conductivity of PANI, which effectively increased electricity generation capacity of NiO@PANI-MFC. The maximum output power density and the charge transfer resistance of NiO@PANI-MFC were 1078.8 mW·m and 10.4â€¯Ω respectively, which were 6.6 times and 68% lower than that of CF-MFC respectively. Moreover, NiO@PANI-MFC could effectively biodegrade dye wastewater due to high biocompatibility of NiO@PANI-CF. The color and COD removal efficiencies of Reactive Brilliant Red X-3B reached 95.94% and 64.24% at 48 h respectively. The results demonstrate that the NiO@PANI-CF has the advantage of high conductivity, high capacitance, high specific surface area, super hydrophilicity, low polarization performance, low charge transfer resistance, high biocompatibility and high stablity.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher

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[PMID]: 29524685
[Au] Autor:Zhang S; Su Y; Xu D; Zhu S; Zhang H; Liu X
[Ad] Address:School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China. Electronic address: zhangpeyton@163.com.
[Ti] Title:Assessment of hydrothermal carbonization and coupling washing with torrefaction of bamboo sawdust for biofuels production.
[So] Source:Bioresour Technol;258:111-118, 2018 Feb 28.
[Is] ISSN:1873-2976
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:Two kinds of biofuels were produced and compared from hydrothermal carbonization (HTC) and coupling washing with torrefaction (CWT) processes of bamboo sawdust in this study. The mass and energy yields, mass energy density, fuel properties, structural characterizations, combustion behavior and ash behavior during combustion process were investigated. Significant increases in the carbon contents resulted in the improvement of mass energy density and fuel properties of biofuels obtained. Both HTC and CWT improved the safety of the biofuels during the process of handling, storing and transportation. The ash-related issues of the biofuels were significantly mitigated and combustion behavior was remarkably improved after HTC and CWT processes of bamboo sawdust. In general, both HTC and CWT processes are suitable to produce biofuels with high fuel quality from bamboo sawdust.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher


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