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871.
D. Rudolph U. Forsberg P. Golubev L. G. Sarmiento A. Yakushev L.-L. Andersson A. Di Nitto Ch. E. Düllmann J. M. Gates K. E. Gregorich C. J. Gross R.-D. Herzberg F. P. Heßberger J. Khuyagbaatar J. V. Kratz K. Rykaczewski M. Schädel S. Åberg D. Ackermann M. Block H. Brand B. G. Carlsson D. Cox X. Derkx K. Eberhardt J. Even C. Fahlander J. Gerl E. Jäger B. Kindler J. Krier I. Kojouharov N. Kurz B. Lommel A. Mistry C. Mokry H. Nitsche J. P. Omtvedt P. Papadakis I. Ragnarsson J. Runke H. Schaffner B. Schausten P. Thörle-Pospiech T. Torres T. Traut N. Trautmann A. Türler A. Ward D. E. Ward N. Wiehl 《Journal of Radioanalytical and Nuclear Chemistry》2015,303(2):1185-1190
872.
Metal ions (Cu2+, Co2+, Cd2+, Ni2+, Pb2+, Zn2+) were concentrated quantitatively and isolated from the sample matrix by a colum 相似文献
873.
We present a tight-binding cluster calculation including interatomic Coulomb repulsion for field-induced adsorption and desorption. For electric field strengths F up to the desorption threshold for N2 on Fe(111) we calculate total potential energy surfaces. The variation of the Schottky barrier and of the N2 vibrational frequency is extracted as a function of F. 相似文献
874.
Karin Landstr m Bj rn Bergenst hl Jan Alsins Mats Almgren 《Colloids and surfaces. B, Biointerfaces》1999,12(3-6):429-440
A new method using fluorescence labelled proteins was developed to determine the quantitative amount of specific protein at the powder surface. The method is based on steady-state fluorescence measurements of pyrene labelled proteins with oxygen gas phase quenching at the powder surface. The surface load of protein was measured for spray-dried dextran powders containing bovine serum albumin (BSA). The results show a patchwise surface load of about 1.3 mg m−2 at a concentration of 0.33% (dry weight) BSA in the powder. The patchwise surface load stays constant with increased BSA concentration in the powder. 相似文献
875.
Dr. Biswanath Das Esteban Alejandro Toledo-Carrillo Dr. Lin Li Dr. Fei Ye Jianhong Chen Prof. Adam Slabon Prof. Oscar Verho Prof. Lars Eriksson Prof. Mats Göthelid Prof. Joydeep Dutta Prof. Björn Åkermark 《ChemCatChem》2022,14(18):e202200538
The low stability of the electrocatalysts at water oxidation (WO) conditions and the use of expensive noble metals have obstructed large-scale H2 production from water. Herein, we report the electrocatalytic WO activity of a cobalt-containing, water-soluble molecular WO electrocatalyst [CoII(mcbp)(OH2)] ( 1 ) [mcbp2−=2,6-bis(1-methyl-4-(carboxylate)benzimidazol-2-yl)pyridine] in homogeneous conditions (overpotential of 510 mV at pH 7 phosphate buffer) and after anchoring it on pyridine-modified fluorine-doped carbon cloth (PFCC). The formation of cobalt phosphate was identified only after 4 h continuous oxygen evolution in homogeneous conditions. Interestingly, a significant enhancement of the stability and WO activity (current density of 5.4 mA/cm2 at 1.75 V) was observed for 1 after anchoring onto PFCC, resulting in a turnover (TO) of >3.6×103 and average TOF of 0.05 s−1 at 1.55 V (pH 7) over 20 h. A total TO of >21×103 over 8 days was calculated. The electrode allowed regeneration of∼ 85 % of the WO activity electrochemically after 36 h of continuous oxygen evolution. 相似文献
876.
Mariza Mone Shi Tang Zewdneh Genene Petri Murto Martyn Jevric Xianshao Zou Joan Ràfols-Ribé Birhan A. Abdulahi Jia Wang Wendimagegn Mammo Mats R. Andersson Ludvig Edman Ergang Wang 《Advanced Optical Materials》2021,9(6):2001701
The synthesis of 5,10,15,20-tetrakis((5,10-bis((2-hexyldecyl)oxy)dithieno[3,2-c:3′,2′-h][1,5]naphthyridin-2-yl)ethynyl)porphyrin zinc(II) (Por4NT), a near-infrared (NIR) emitting compound, comprising a zinc porphyrin core linked with triple bonds through its meso positions to four 5,10-bis((2-hexyldecyl)oxy)dithieno[3,2-c:3′,2′-h][1,5]naphthyridine (NT) arms is reported. Por4NT featured high solubility in common non-polar solvents, which is ideal for easy processing through solution techniques, and high photoluminescence (PL) efficiency of ≈30% in dilute toluene solution. It also exhibited a strong tendency for aggregation because of its flat conformation, and this aggregation resulted in a strong redshifted emission and a drop in PL efficiency. A well-matched PBDTSi-BDD-Py “host” terpolymer is therefore designed, which is capable of mitigating the aggregation of the Por4NT “guest”. An optimized blend of the host, guest, and an ionic-liquid electrolyte is utilized as the active material in a light-emitting electrochemical cell (LEC), which delivered strong NIR radiance of 134 µW cm-2 with a long wavelength maximum at 810 nm at a low drive voltage of 5.0 V. The attainment of the strong NIR emission from the host–guest LEC is attributed to a tuned aggregation of the Por4NT emitter, which resulted in the desired aggregation-induced redshift of the emission at a reasonably retained efficiency. 相似文献
877.
Magda Nyström Hamid R. Tamaddon Jahromi Mats Stading Michael F. Webster 《Rheologica Acta》2016,55(5):373-396
In this study, hyperbolic contraction–expansion flow (HCF) devices have been investigated with the specific aim of devising new experimental measuring systems for extensional rheological properties. To this end, a hyperbolic contraction–expansion configuration has been designed to minimize the influence of shear in the flow. Experiments have been conducted using well-characterized model fluids, alongside simulations using a viscoelastic White–Metzner/FENE-CR model and finite element/finite volume analysis. Here, the application of appropriate rheological models to reproduce quantitative pressure drop predictions for constant shear viscosity fluids has been investigated, in order to extract the relevant extensional properties for the various test fluids in question. Accordingly, experimental evaluation of the hyperbolic contraction–expansion configuration has shown rising corrected pressure drops with increasing elastic behaviour (De=0～16), evidence which has been corroborated through numerical prediction. Moreover, theoretical to predicted solution correspondence has been established between extensional viscosity and first normal stress difference. This leads to a practical means to measure extensional viscosity for elastic fluids, obtained through the derived pressure drop data in these HCF devices. 相似文献
878.
Vanadium peroxidases from marine algae are responsible for the production of ozone-depleting compounds, volatile halogenated organic compounds (VHOC). Due to the impact the release of these compounds has on the global atmospheric and biogeochemical processes, there is an interest within marine sciences in developing analytical methods for studying the various aspects of the VHOC production, particularly in situ. This study aimed to provide new methods towards the development of in situ methods within marine sciences. We demonstrate the use of design of experiments together with orthogonal partial least squares (OPLS) and transposed orthogonal partial least squares (T-OPLS) to address the qualitative spectral analysis of an enzyme-buffer system. The measurements were performed with surface-enhanced Raman spectroscopy (SERS) on vanadium bromoperoxisase from the red algae Corallina officinalis. The chemometric tools used aimed to provide greater insights into how factors such as time, amount of gold nanoparticles and enzyme concentration influence the spectral responses and whether there was any synergy between those factors. The results acquired in this report aim to support future method development of chemometrics within in situ applications in marine sciences. 相似文献
879.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option. 相似文献
880.
The microstructure and rheological behaviour of inhomogeneous biopolymer gels was studied using a model system of β-lactoglobulin. It can form both fine-stranded and particulate gels which can be homogeneous or inhomogeneous depending on pH and heating rate. The dense and loose regions of the fine-stranded gels had different relaxation times which significantly influenced the mechanical spectrum. The particulate gels showed coarser inhomogeneities influencing the fracture properties of the gels. 相似文献