Dynamic changes in messenger RNA profiles of bovine endometrium during the oestrous cycle   总被引：1，自引：0，他引：1  

Mitko K  Ulbrich SE  Wenigerkind H  Sinowatz F  Blum H  Wolf E  Bauersachs S 《Reproduction (Cambridge, England)》2008,135(2):225-240

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Daniël Hendrik Turkenburg  Henk van Bracht  Björn Funke  Martin Schmider  Doreen Janke  Hartmut Rudolf Fischer 《应用聚合物科学杂志》2017,134(26)

A facile two‐step process is developed to obtain polyester urethanes that contain various concentrations of thermoreversible Diels–Alder adduct–based bonds for the development of adhesives. Besides linear systems thermoreversible networks have been included in the study. The reactions are verified using IR‐spectroscopy and gel permeation chromatography analysis. The material properties are characterized with solvent exposure tests, dynamic scanning calorimetry, microindentation and rheology and the potential for application as adhesives is tested with an elcometer. Material properties have been found highly tunable for the system, and high adhesive strengths (off‐scale) are found for polyester urethanes that are doped with an intermediate level Diels–Alder functional groups. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44972.  相似文献   

    

Atezaz Ahmad;Jan Schneider;Dai Griffiths;Daniel Biedermann;Daniel Schiffner;Wolfgang Greller;Hendrik Drachsler; 《Journal of Computer Assisted Learning》2024,40(6):2432-2470

During the past decade, the increasingly heterogeneous field of learning analytics has been critiqued for an over-emphasis on data-driven approaches at the expense of paying attention to learning designs.  相似文献   

    

Hendrik Martin Reinhardt  Philipp Maier  Hee‐Cheol Kim  Daniel Rhinow  Norbert Hampp 《Advanced Materials Interfaces》2019,6(16)

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Sabrina Bialas  Lukas Michalek  David E. Marschner  Tim Krappitz  Martin Wegener  James Blinco  Eva Blasco  Hendrik Frisch  Christopher Barner‐Kowollik 《Advanced materials (Deerfield Beach, Fla.)》2019,31(8)

A platform technology for multimaterial photoresists that can be orthogonally cured by disparate colors of light is introduced. The resist's photochemistry is designed such that one wavelength selectively activates the crosslinking of one set of macromolecules, while a different wavelength initiates network formation of a different set of chains. Each wavelength is thus highly selective towards a specific photoligation reaction within the resist. Critically, the shorter wavelength does not induce ligation of the longer wavelength selective species within the same resist mixture, defined as “wavelength orthogonality.” Uniquely, this dual‐color addressable resist system allows generating spatially resolved soft matter materials by simply selecting the curing wavelength, thus constituting a wavelength‐orthogonal multimaterial resist with applications ranging from coatings to 3D additive manufacturing of multimaterial architectures.  相似文献   

    

Yuanbao Lin  Begimai Adilbekova  Yuliar Firdaus  Emre Yengel  Hendrik Faber  Muhammad Sajjad  Xiaopeng Zheng  Emre Yarali  Akmaral Seitkhan  Osman M. Bakr  Abdulrahman El‐Labban  Udo Schwingenschlgl  Vincent Tung  Iain McCulloch  Frdric Laquai  Thomas D. Anthopoulos 《Advanced materials (Deerfield Beach, Fla.)》2019,31(46)

The application of liquid‐exfoliated 2D transition metal disulfides (TMDs) as the hole transport layers (HTLs) in nonfullerene‐based organic solar cells is reported. It is shown that solution processing of few‐layer WS₂ or MoS₂ suspensions directly onto transparent indium tin oxide (ITO) electrodes changes their work function without the need for any further treatment. HTLs comprising WS₂ are found to exhibit higher uniformity on ITO than those of MoS₂ and consistently yield solar cells with superior power conversion efficiency (PCE), improved fill factor (FF), enhanced short‐circuit current (J_SC), and lower series resistance than devices based on poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) and MoS₂. Cells based on the ternary bulk‐heterojunction PBDB‐T‐2F:Y6:PC₇₁BM with WS₂ as the HTL exhibit the highest PCE of 17%, with an FF of 78%, open‐circuit voltage of 0.84 V, and a J_SC of 26 mA cm^?2. Analysis of the cells' optical and carrier recombination characteristics indicates that the enhanced performance is most likely attributed to a combination of favorable photonic structure and reduced bimolecular recombination losses in WS₂‐based cells. The achieved PCE is the highest reported to date for organic solar cells comprised of 2D charge transport interlayers and highlights the potential of TMDs as inexpensive HTLs for high‐efficiency organic photovoltaics.  相似文献   

    

Chandrani Pramanik  Tariq Jamil  Jacob R. Gissinger  Darice Guittet  Pedro J. Arias‐Monje  Satish Kumar  Hendrik Heinz 《Advanced functional materials》2019,29(50)

Polyacrylonitrile (PAN) is among the most promising precursor polymers to produce strong and lightweight carbon fiber. Conformations in solution and the extent of binding to carbon nanotubes (CNTs) are critical during gel spinning and for alignment of graphitic layers upon carbonization. Here, quantitative insights into these processes are reported using molecular dynamics simulations at the atomic scale including virtual π electrons and comparisons to experimental data. Common solvents for fiber spinning induce significant differences in PAN conformation in dilute solutions at 25 °C with persistence lengths between 0.5 and 2 nm. Variations in conformation become smaller at 75 °C, in the presence of CNTs, and at higher PAN concentration. “Aging” of PAN conformations in dimethylformamide and dimethylsulfoxide at higher temperature is explained and a correlation between extended polymer conformations and increased binding to CNTs is identified in dilute solutions. PAN is overall barely attracted to CNTs under common solution conditions and enters significant surface contact only at higher concentration as solvent is physically removed. The impact of temperature is small, whereby binding increases at lower temperatures. The results provide guidance to control interactions of polymers with CNTs to induce distinct conformations and specific binding at the early stages of assembly.  相似文献   

    

Alexandra F. Paterson  Alexander D. Mottram  Hendrik Faber  Muhammad R. Niazi  Zhuping Fei  Martin Heeney  Thomas D. Anthopoulos 《Advanced Electronic Materials》2019,5(5)

The impact of the gate dielectric on contact resistance in organic thin‐film transistors (OTFTs) is investigated using electrical characterization, bias‐stress stability measurements, and bandgap density of states (DOS) analysis. Two similar dielectric materials, namely Cytop and poly[4,5‐difluoro‐2,2‐bis(trifluoromethyl)‐1,3‐dioxole‐co‐tetrafluoroethylene] (Teflon AF2400), are tested in top‐gate bottom‐contact OTFTs. The contact resistance of Cytop‐based OTFTs is found to be greater than that of the AF2400‐based devices, even though the metal/OSC interface remains identical in both systems. The Cytop devices are also found to perform worse in bias‐stress stability tests which, along with the DOS calculations, suggests that charge trapping at the OSC/dielectric interface is more prevalent with Cytop than AF2400. This increased charge trapping at the Cytop OSC/dielectric interface appears to be associated with the higher contact resistance in Cytop OTFTs. Differences in the molecular structure between Cytop and AF2400 and the large difference in the glass transition temperature of the two polymers may be responsible for the observed difference in the transistor performance. Overall, this study highlights the importance of the gate dielectric material in the quest for better performing OTFTs and integrated circuits.  相似文献   

    

Hendrik Westermann  Alexander Reitz  Rolf Mahnken  Mirko Schaper  Olexandr Grydin 《国际钢铁研究》2022,93(1):2100346

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Rafael A. Reifsteck  Song Zhai  Marcel Gausmann  Dr. Hendrik Ballerstedt  Dr. Till Tiso  Prof. Dr. Lars M. Blank  Prof. Dr.-Ing. Andreas Jupke 《化学，工程师，技术》2023,95(8):1247-1258

Mixed plastic waste is challenging for any recycling process. Here, an enzymatic recycling process is compared with a biotechnological upcycling process for valorizing mixed plastic waste constituted by PLA, PET, and PP. Both process routes are modeled in Aspen Plus, analyzed for bottlenecks, cost drivers, and sensitivity regarding enzymatic and microbial performance. While enzymatic recycling is only viable for uniform plastic feedstock, biotechnological upcycling operating at optimized process conditions reveals the potential to produce carbon-neutral succinic acid from mixed plastic waste.  相似文献