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Improving the operational stability of perovskite solar cells with cesium-doped graphene oxide interlayer

Journal of Energy Chemistry 2024年第9期96卷 483-490页

作者： Masaud Almalki Katerina Anagnostou Konstantinos Rogdakis Felix T.Eickemeyer Mostafa othman Minas M.Stylianakis Dimitris Tsikritzis Anwar Q.Alanazi Nikolaos Tzoganakis Lukas Pfeifer Rita Therisod Xiaoliang Mo Christian M.Wolff Aïcha Hessler-Wyser Shaik M.Zakeeruddin Hong Zhang Emmanuel Kymakis michael Grätzel Laboratory of Photonics and Interfaces École Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Department of Electrical and Computer Engineering Hellenic Mediterranean UniversityHeraklionCrete 71410Greece Institute of Electrical and Microengineering(IEM)Photovoltaics and Thin-Film Electronics Laboratory(PV-Lab) École Polytechnique Fédérale de Lausanne(EPFL)Neuchâtel 2000Switzerland Department of Nursing Faculty of Health SciencesHellenic Mediterranean UniversityCrete 71410Greece Centre Interdisciplinaire de Microscopie Electronique École Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Future Energy Technology Institute King Abdulaziz City for Science and Technology(KACST)P.O.Box 6086Riyadh 11442Saudi Arabia State Key Laboratory of Photovoltaic Science and Technology Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and PerceptionInstitute of OptoelectronicsDepartment of Materials ScienceFudan UniversityShanghai 200433China

Perovskite solar cells(PSCs)have made great advances in terms of power conversion efficiency(PCE),yet their subpar stability continues to hinder their *** interface between the perovskite layer and the charge-carrier transporting layers plays a crucial role in undermining the stability of *** this work,we propose a strategy to stabilize high-performance PSCs with PCE over 23%by introducing a cesium-doped graphene oxide(Go-Cs)as an interlayer between the perovskite and hole-transporting *** Go-Cs treated PSCs exhibit excellent operational stability with a projected T80(the time where the device PCE reduces to 80%of its initial value)of 2143 h of operation at the maximum powering point under one sun illumination.

关键词： Perovskite solar cells Doped graphene oxide Graphene related material Long-term operational stability

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Root System Traits Contribute to Variability and Plasticity in Response to Phosphorus Fertilization in 2 Field-Grown Sorghum[Sorghum bicolor(L.)Moench]Cultivars

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Plant Phenomics 2023年第1期5卷 6-21页

作者： michael o.Adu Paul A.Asare David o.Yawson Kwadwo K.Amoah Kofi Atiah Matthew K.Duah Alex Graham Department of Crop Science School of AgricultureCollege of Agriculture and Natural SciencesUniversity of Cape CoastCape CoastGhana Centre for Resource Management and Environmental Studies(CERMES) The University of the West IndiesCave Hill CampusP.O.Box 64Bridgetown BB11000Barbados Department of Soil Science School of AgricultureCollege of Agriculture and Natural SciencesUniversity of Cape CoastCape CoastGhana

Due to roots'physical and physiological roles in crop productivity,interest in root system architecture(RSA)and plasticity in responses to abiotic stresses is *** is significant for the food security of millions of *** deficiency is an important limitation of sorghum *** is little information on the RSA-based responses of sorghum to variations in external P supply([P]_(ext)).This study evaluated the phenotypic plasticity and RSA responses to a range of[P]_(ext) in 2 sorghum *** results showed that both genotypes responded to[P]_(ext) but with significant variations in about 80%of the RSA traits *** biomass and most RSA traits increased with increasing[P]_(ext).Plasticity was both genotype-and *** most RSA traits,the white sorghum genotype showed significantly higher plasticity than the red genotype,with the former having about 28.4%higher total plasticity than the *** traits,such as convex area,surface area,total root length,and length diameter ranges,showed sizeable genetic *** biomass had a high degree of plasticity,but root number and angle traits were the leading contributors to *** results suggested 2 root trait spectra:root exploration and developmental spectrum,and there was an indication of potential trade-offs among groups of root *** is concluded that RSA traits in sorghum contribute to variability and plasticity in response to[P]_(ext).Given that there might be trade-offs among sorghum root traits,it would be instructive to determine the fundamental constraints underlying these trade-offs.

关键词： Root instru constraints

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Lateral dipole moments induced by all-cis-pentafluorocyclohexyl groups cause unanticipated effects in self-assembled monolayers

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Nano Research 2023年第8期16卷 11030-11041页

作者： Christian Fischer Saunak Das Qingzhi Zhang Yangbiao Liu Lothar Weinhardt David o’Hagan michael Zharnikov Andreas Terfort Institute of Inorganic and Analytical Chemistry Goethe University FrankfurtMax-von-Laue-Straße 760438 Frankfurt am MainGermany Applied Physical Chemistry Heidelberg UniversityIm Neuenheimer Feld 25369120 HeidelbergGermany School of Chemistry University of St AndrewsNorth HaughSt AndrewsFifeKY169STUK Institute for Photon Science and Synchrotron Radiation Karlsruhe Institute of Technology(KIT)Hermann-v.-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Institute for Chemical Technology and Polymer Chemistry(ITCP) Karlsruhe Institute of Technology(KIT)Engesserstr.18/2076128 KarlsruheGermany Department of Chemistry and Biochemistry University of NevadaLas Vegas(UNLV)4505 Maryland ParkwayLas VegasNV 89154-4003USA

All-cis-hexafluoro-and all-cis-pentafluoro-cyclohexane(PFCH)derivatives are new kinds of materials,the structures and properties of which are dominated by the highly dipolar Janus-face ***,we report on the effects of integrating the PFCH groups into self-assembled monolayers(SAMs)of alkanethiolates on Au(111).Monolayers with an odd(eleven)and even(twelve)number of methylene groups were characterized in detail by several complementary experimental tools,supported by theoretical ***,all the data show a high similarity of both kinds of monolayers,nearly lacking the typically observed odd-even *** new monolayers have a packing density about 1/3 lower than that of non-substituted alkanethiolate monolayers,caused by the bulkiness of the PFCH *** orientations of the PFCH groups and the alkyl chains could be determined independently,suggesting a conformation similar to the one found in the solid state structure of an analogous *** in the SAMs the PFCH groups are slightly tilted away from the surface normal with the axial fluorine atoms pointing downwards,most of the dipole moments of the group remain oriented parallel to the surface,which is a unique feature for a SAM *** consequences are much lower water contact angles compared to other partly fluorinated SAMs as well as rather moderate work function *** interaction between the terminal PFCH moieties results in an enhanced stability of the PFCH-decorated SAMs toward exchange reaction with potential molecular substituents in spite of the lower packing density of these films.

关键词： odd-even-effects work function self-assembled monolayer(SAM) kinetic stability infrared-reflection absorption spectroscopy X-ray photoelectron spectroscopy

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The HIF-1α/PLoD2 axis integrates extracellular matrix organization and cell metabolism leading to aberrant musculoskeletal repair

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Bone Research 2024年第2期12卷 289-301页

作者： Heeseog Kang Amy L.Strong Yuxiao Sun Lei Guo Conan Juan Alec C.Bancroft Ji Hae Choi Chase A.Pagani Aysel A.Fernandes michael Woodard Juhoon Lee Sowmya Ramesh Aaron W.James David Hudson Kevin N.Dalby Lin Xu Robert J.Tower Benjamin Levi Center for organogenesis Regeneration and TraumaDepartment of SurgeryUniversity of Texas SouthwesternDallasTX 75390USA Section of Plastic Surgery Department of SurgeryUniversity of MichiganAnn ArborMI 48109USA Quantitative Biomedical Research Center Peter O’Donnell Jr.School of Public HealthUniversity of Texas SouthwesternDallasTX 75390USA Department of orthopedics and Sports Medicine University of WashingtonSeattleWA 98195USA Division of Chemical Biology and Medicinal Chemistry College of PharmacyUniversity of Texas at AustinAustinTX 78712USA Department of Pathology Johns Hopkins UniversityBaltimoreMD 21218USA

While hypoxic signaling has been shown to play a role in many cellular processes,its role in metabolism-linked extracellular matrix(ECM)organization and downstream processes of cell fate after musculoskeletal injury remains to be ***(Ho)is a debilitating condition where abnormal bone formation occurs within extra-skeletal *** andhypoxia-inducible factor 1α(HIF-1α)activation have been shown to promote ***,the underlying molecular mechanisms bywhich the HIF-1αpathway in mesenchymal progenitor cells(MPCs)contributes to pathologic bone formation remain to ***,we used a proven mouse injury-induced Ho model to investigate the role of HIF-1αon aberrant cell ***-cell RNA sequencing(scRNA-seq)and spatial transcriptomics analyses of the Ho site,we found that collagen ECM organizationis the most highly up-regulated biological process in *** mesenchymal cell-specific deletion of Hif1α(Hoxa11-CreER^(T2);Hif1a^(fl/fl))significantly mitigated Ho in ***-seq analysis of these Hoxa11-CreER^(T2);Hif1a^(fl/fl)mice identified the PLoD2/LoXpathway for collagen cross-linking as downstream of the HIF-1αregulation of ***,our scRNA-seq data and mechanisticstudies further uncovered that glucose metabolism in MPCs is most highly impacted by HIF-1α*** a translational aspect,a pan-LoX inhibitor significantly decreased Ho.A newly screened compound revealed that the inhibition of PLoD2 activity in MPCssignificantly decreased osteogenic differentiation and glycolytic *** suggests that the HIF-1α/PLoD2/LoX axis linked tometabolism regulates Ho-forming MPC *** results suggest that the HIF-1α/PLoD2/LoX pathway represents a promisingstrategy to mitigate Ho formation.

关键词： metabolism skeletal aberrant

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Protein-protein interface analysis of the non-ribosomal peptide synthetase peptidyl carrier protein and enzymatic domains

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Synthetic and Systems Biotechnology 2022年第2期7卷 671-682页

作者： Joshua C.Corpuz Javier o.Sanlley michael D.Burkart Department of Chemistry and Biochemistry University of California-San Diego9500 Gilman DriveLa JollaCA92093-0358USA

Non-ribosomal peptide synthetases(NRPSs)are attractive targets for biosynthetic pathway engineering due to their modular architecture and the therapeutic relevance of their *** catalysis mediated by specific protein-protein interactions formed between the peptidyl carrier protein(PCP)and its partner enzymes,NRPS enzymology and control remains fertile ground for *** review focuses on the recent efforts within structural biology by compiling high-resolution structural data that shed light into the various protein-protein interfaces formed between the PCP and its partner enzymes,including the phosphopantetheinyl transferase(PPTase),adenylation(A)domain,condensation(C)domain,thioesterase(TE)domain and other tailoring enzymes within the *** our understanding of how the PCP recognizes partner proteins with the potential to use directed evolution and combinatorial biosynthetic methods will enhance future efforts in discovery and production of new bioactive compounds.

关键词： Natural products Protein-protein interactions Non-ribosomal peptide synthetase Peptidyl carrier protein Combinatorial biosynthesis Synthetic biology

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Seasonal variations in nutritive and botanical composition properties of multispecies grazing swards over an entire dairy grazing season

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Grassland Research 2022年第4期1卷 221-233页

作者： Ciarán Hearn michael Egan Mary Bridget Lynch Christina Fleming michael o'Donovan Teagasc Animal and Grassland Research and Innovation Centre MooreparkCorkIreland School of Agriculture and Food Science University College DublinDublinIreland Contribution:Formal analysis InvestigationMethodologyVisualizationWriting-original draftWriting-review&editing

Background Recently,there has been increasing interest in the use of multispecies(MS)swards in dairy grazing *** A plot grazing study was established to investigate the potential contribution of different sward species(perennial ryegrass,legumes and herbs)sown in grazing *** sward mixtures were sown,ranging in complexity from a perennial ryegrass(PRG)monoculture to binary mixtures including either forage legumes or herbs to a five-species mixture;four different nitrogen(N)application rates of 0,100,150 and 200 kg N ha−1 were applied to each *** Species abundance for all sward species components was associated with the interaction of time point and sward mixture;species abundance for all sward components,except PRG,was associated with the interaction of N application and sward *** interactions of time point and sward mixture,and time point and N application rate,were associated with all analysed sward chemical components,except for sward *** Increased N application rates reduced the level of clover in all sward *** levels of white clover led to increased sward crude protein levels;the inclusion of ribwort plantain led to some seasonal variation in the nutritive value of swards.

关键词： botanical composition chemical composition dairy production grazing multispecies swards

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Balancing nutrients in a toxic environment: the challenge of eating

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Insect Science 2022年第1期29卷 289-303页

作者： Peng Wang Daniel G.Vassão Bettina Raguschke michael J.Furlong Myron P.Zalucki School of Biological Sciences The University of QueenslandSt LuciaQueenslandAustralia Department of Biochemistry Max Planck Institute for Chemical EcologyJenaGermany

Insect herbivores can regulate their food intake by mixing food sources with different nutrient content, but face the resulting challenge of ingesting various plant secondary metabolites. How insects deal with toxins in a complex nutrient environment is unclear. Here we investigated the influence of a classic plant secondary metabolite, allyl glucosinolate (sinigrin), and its hydrolyzed product allyl isothiocyanate (AITC), on the development of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) when fed on diets with different protein-to-carbohydrate (p : c) ratios. We also examined the effects of these toxins on larval biochemistry, by chemically analyzing the frass produced by insects feeding on the different diets. As expected, AITC had a greater negative effect than sinigrin on H. armigera life-history traits. However, AITC at low concentration appeared to have a positive effect on some traits. Both sinigrin and AITC-induced detoxification activity in the gut, and the reaction was related to diet protein concentration. High-protein diets can provide the required free amino acid, especially cysteine, needed for the detoxification process. The nutrient content of the diet influences how plant secondary metabolites are handled, and the use of artificial diets in experiments investigating the metabolic fate of plant secondary compounds needs to be carefully evaluated.

关键词： diet protein glucosinolate gut metabolism Helicoverpa armigera isothiocyanate

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Decision support for the development,simulation and optimization of dynamic process models

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Frontiers of Chemical Science and Engineering 2022年第2期16卷 210-220页

作者： Norbert Asprion Roger Böttcher Jan Schwientek Johannes Höller Patrick Schwartz Charlie Vanaret michael Bortz BASF SE 67063 LudwigshafenGermany Fraunhofer ITWM 67663 KaiserslauternGermany

Simulation is besides experimentation the major method for designing,analyzing and optimizing chemical *** ability of simulations to reflect real process behavior strongly depends on model *** and adaption of process models are usually based on available plant *** such a model in various simulation and optimization studies can support the process designer in his *** steady state models there is also a growing demand for dynamic models either to adapt faster to changing conditions or to reflect batch *** this contribution challenges of extending an existing decision support framework for steady state models to dynamic models will be discussed and the resulting opportunities will be demonstrated for distillation and reactor examples.

关键词： decision support multicriteria optimization model validation dynamic model sensitivity analysis

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Using machine learning models to explore the solution space of large nonlinear systems underlying flowsheet simulations with constraints

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Frontiers of Chemical Science and Engineering 2022年第2期16卷 183-197页

作者： Patrick otto Ludl Raoul Heese Johannes Höller Norbert Asprion michael Bortz Fraunhofer ITWM optimization Department Kaiserslautern 67663Germany Chemical and Process Engineering BASF SE Ludwigshafen 67056Germany

Flowsheet simulations of chemical processes on an industrial scale require the solution of large systems of nonlinear equations,so that solvability becomes a practical *** constraints from technical,economic,environmental,and safety considerations may further limit the feasible solution space beyond the convergence requirement.A priori,the design variable domains for which a simulation converges and fulfills the imposed constraints are usually unknown and it can become very time-consuming to distinguish feasible from infeasible design variable choices by simply running the simulation for each *** support the exploration of the design variable space for such scenarios,an adaptive sampling technique based on machine learning models has recently been ***,that approach only considers the exploration of the convergent domain and ignores additional *** this paper,we present an improvement which particularly takes the fulfillment of constraints into *** successfully apply the proposed algorithm to a toy example in up to 20 dimensions and to an industrially relevant flowsheet simulation.

关键词： machine learning flowsheet simulations constraints exploration

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Microbial Enzymes and Their Applications in Food Industry: A Mini-Review

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Advances in Enzyme Research 2022年第1期10卷 23-47页

作者： michael o. okpara Department of Biochemistry Federal University of Technology Akure Nigeria

The use of enzymes is replacing chemicals in many industrial production processes because of the eco-friendly nature of enzymes which do not generate greenhouse gases and have reduced the demand for energy in industries. To meet the ever-increasing demand for enzymes in many industries and survive the harsh production conditions, microbial sources of enzyme production are the most preferred source for industrial enzyme production because the microbes are readily available, they grow at a very fast rate, and they can be genetically manipulated to produce enzymes which can perform optimally at different industrial production conditions. Microbial enzymes have found so many applications in various industries (textiles, leather, paper and pulp, research and development, pharmaceutical, agriculture, detergent, waste, biorefineries, photography and food industries), thus making them very essential in several industrial production processes. Here in this review, the application of some important microbial enzymes in food industry and the microbial sources for the enzymes are discussed.

关键词： Bacteria Food Industry Fungi Microbes Microbial Enzymes

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