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4篇 您的检索式:作者名="Angela Hofmann"
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1Autotaxin is expressed in FLT3-ITD positive acute myeloid leukemia and hematopoietic stem cells and promotes cell migration and proliferation显示文摘Claudia Ortlepp Christine Steudel Caroline Heiderich Sina Koch Angela Jacobi Martin Ryser Sebastian Brenner Martin Bornh?user Benedikt Brors Wolf-Karsten Hofmann Gerhard Ehninger Christian Thiede 2013Experimental Hematology2013,,5:1
2Corrigendum to“Alternative feedstock for the production of activated carbon with ZnCl2:Forestry residue biomass and waste wood”[Carbon Resour.Convers.5(2022)299-309]显示文摘The authors regret that there was a mix-up in the illustrations during the approval process.Here is the correct image for Fig.4:The authors would like to apologise for any inconvenience caused.Dominik Bosch Jan O.Back David Gurtner Sara Giberti Angela Hofmann Anke Bockreis 2023Carbon Resources Conversion2023,6,1:0
3Development of a sample preparation approach to measure the size of nanoparticle aggregates by electron microscopy显示文摘Electron microscopy (EM) is widely used for nanoparticle (NP) sizing. Following an initial assessment of two sample preparation protocols described in the current literature as'unperturbed', we found that neither could accurately measure the size of NPs featuring a broad size distribution, e.g., aggregates. Because many real-world NP samples consist of aggregates, this finding was of considerable concern. The data showed that the protocols introduced errors into the measurement by either inducing agglomeration artefacts or providing a skewed size distribution towards small particles (skewing artefact). The focus of this work was to develop and apply a mathematical refinement to correct the skewing artefact. This refinement provided a much improved agreement between EM and a reference methodology, when applied to the measurement of synthetic amorphous silica NPs. Further investigation, highlighted the influence of NP chemistry on the refinement. This study emphasised the urgent need for greater and more detailed consideration regarding the sample preparation of NP aggregates to routinely achieve accurate measurements by EM. This study also provided a novel refinement solution applicable to the size characterisation of silica and c让rate-coated gold NPs featuring broad size distributions. With further research, this approach could be extended to other NP types.Agnieszka Dudkiewicz Angela Lehner Qasim Chaudhry Kristian Molhave Guenter Allmaier Karen Tiede Alistair B.A. Boxall Peter Hofmann John Lewis 2019Particuology2019,17,4:0
4Alternative feedstock for the production of activated carbon with ZnCl_(2):Forestry residue biomass and waste wood显示文摘In order to substitute fossil resources in activated carbon(AC)production,recent efforts have focused on the utilization of renewable raw materials.Regions with important wood industries offer two potentially underestimated resource types:forestry residue biomass(FRB)and waste wood(WW).Although these materials are widely available(approx.130 mio.m3a-1 FRB,approx.50 mio.ta^(-1) WW in the EU),they are mostly valorised through energy production,as they are high in ashes and may be contaminated with organics and heavy metals.In this study,both FRB and WW were treated via one-step pyrolysis for AC production.ZnCl_(2) was applied as activating agent at pyrolysis temperatures varying from 400 to 600℃ and residence times between 1 and 3 h.Overall,76 samples were prepared and characterized thoroughly via elemental analysis,N_(2)/CO_(2) ad/-desorption,thermogravimetric analysis(TGA),scanning electron microscopy(SEM),and infrared spectroscopy(FTIR).The produced carbons showed specific surface areas of up to 1430 m2g��1 and a pore size distribution with a micropore share of up to 80%.The presence of oxygen-containing functional groups was confirmed via FTIR.Potential feedstock contamination can be mitigated,as minerals and heavy metals could be leached out(up to-99.15%)by an additional wash step and organic contamination undergoes thermal cracking during pyrolysis.The presented study could be a next step in upcycling considerable waste streams from the wood sector through localised and non-fossil-based AC production.Dominik Bosch Jan OBack David Gurtner Sara Giberti Angela Hofmann Anke Bockreis 2022Carbon Resources Conversion2022,5,4:0
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