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Assessing tree crown fire damage integrating linear spectral mixture analysis and supervised machine learning on Sentinel-2 imagery

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International Journal of Digital Earth 2023年第1期16卷 3162-3198页

作者： Giandomenico De Luca Giuseppe Modica joao M.N.Silva Salvatore Praticò JoséM.c.Pereira Dipartimento di Agrari1 Universitàdegli Studi Mediterranea di Reggio Calabri1Reggio Calabri1Italy Dipartimento di Scienze veterinarie Universitàdegli Studi di Messin1Messin1Italy forest Research centre School of AgricultureUniversity of LisbonLisbonPortugal

crown fire damage is a mixture of three principal fire-related components:charred material,scorched foliage,and unaltered green *** study estimated the abundance of these physical alterations in two immediate post-fire Mediterranean forest contexts(Portugal and Italy)by applying linear spectral mixture analysis(LSMA)on Sentinel-2 *** tree crowns fire damage was subsequently mapped,integrating fractional abundance information in a random forest(Rf)algorithm,comparing the accuracy resulting from the adoption of generic or image spectral libraries as the primary investigative *** image-derived endmembers resulted in more effectiveness in terms of fire-related components abundance quantification(LMSAderived RMSEf-scores always were≥90%whether generic endmembers or image endmembers derived information was *** environmental heterogeneity of the two study areas affected the fire severity gradients,with a prevalence of the charred(PT)(45–46%)and green class(IT)(44–53%).Post-fire temporal monitoring was initialized by applying the proposed strategies,and the preliminary results showed a positive recovery trend in forest vegetation from the first year following the fire event,with a reduced charcoal predominance and an increasing proportion of green components.

关键词： Post-fire assessment fire severity post-fire vegetation recovery random forest(Rf) scikit-learn fraction image extraction spectral unmixing endmembers crown fire damage mapping fully constrained least squares pixel purity index

A visible light-mediated three-component strategy based on the ring-opening of cyclic ethers with aryldiazoacetates and nucleophiles

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Organic chemistry frontiers 2022年第5期9卷 1321-1326页

作者： Mateus L.Stivanin Rafael D.c.Gallo joao Paulo M.Spadeto Rodrigo A.cormanich Igor D.Jurberg State University of campinas Institute of ChemistryRua Monteiro Lobato 27013083-862 CampinasSPBrazil

A blue light-promoted reaction between aryldiazoacetates and different nucleophiles has been developed in the presence of THf(and other cyclic ethers)as the solvent,allowing the incorporation of these three elements into a single ***,this transformation represents an O–H insertion strategy of more complex alcohols into aryldiazoesters,without the need of pre-assembling *** method is mild and efficient and proceeds in the absence of metals,generally at room temperature.

关键词： temperature visible light

Quantification of theophylline or paracetamol in milk matrices by high-performance liquid chromatography

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Journal of Pharmaceutical Analysis 2017年第6期7卷 401-405页

作者： Tania A.P.fernandes joao P.Aguiara Ana I.fernandes joao f.Pinto ciiEM-centro de Investigacao Interdisciplinar Egas Moniz Instituto Superior de Cinncias da Saude Egas MonizCampus Universitario-Quinta da GranjaMonte de Caparica2829-511 CaparicaPortugal iMed.UL-Dep.Tecnologia farmaceutica Faeuldade de FarmdciaUniversidade de LisboaAv.Prof.Gama Pinto1649-003 LisboaPortugal

A simple, accurate and sensitive high-performance liquid chromatography （HPLc） method was developed, validated and applied to the determination of either theophylline or paracetamol in milk-based samples. The method allowed drug quantification in fresh and powdered milk with a relatively short run time of analysis and it was also successfully applied to the quantification of the drugs in solid dosage forms intended for pediatric use. Moreover, the main significant advantages over other published works are the simplicity of the sample preparation, reduced assay time and sample loss. The method meets the International conference on Harmonization guideline for analytical methods validation regarding specificity, linearity, accuracy, precision, specificity and robustness as required by health authorities and applied by industry while designing and marketing new drug products. The technique encompasses the separation of the analytes with a reverse phase c18 column under isocrafic conditions and UV detection at 272 nm and 243 nm, respectively, for theophylline and paraeetamol. The lower limit of quantification for both drugs was determined as 0.2 μg/mL and the between-batch accuracy was 99.7%. This HPLc method allows quantification of theophylline and paracetamol in milk matrices and it can be applied in the design, development and production of milk-based pediatric dosage forms.

关键词： Liquid chromatography fresh milk Powdered milk Paracetamol Theophylline

Effect of biochar on the metabolome of soybean seedlings

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Oil crop Science 2024年第1期9卷 60-68页

作者： Nathalia E.Silva Mariana G.Aguilar Osania E.ferreira Gleicia M.Paulino Jaqueline c.L.carvalho Lúcia P.S.Pimenta Alan R.T.Machado Programa de Pos-graduaçao em ciencias Ambientais Universidade do Estado de Minas GeraisFrutalMinas Gerais38202-436Brazil Departamento de Química Universidade Federal de Minas GeraisMinas GeraisBelo Horizonte31270-901Brazil Departamento de Engenharia Aplicada e Tecnologias Ambientais Universidade do Estado de Minas GeraisJoao MonlevadeMinas Gerais35930-314Brazil Departamento de ciencias Exatas Universidade do Estado de Minas GeraisJoao MonlevadeMinas Gerais35930-314Brazil

The use of biochar can have several effects on plant germination,depending on raw material,preparation method and application ***,the molecular mechanisms that lead to those results have yet to be *** aim of this research was to improve the understanding of these mechanisms by characterizing the metabolic effects of sugarcane bagasse biochar on soybean *** types of biochars were prepared by pyrolysis at 300℃(ScB300),400℃(ScB400)and 600℃(ScB600).Then,each one was mixed into sand at 1%,3%,5%(w/w)dose,*** experiment was performed in 8 days of incubation,when the number of germinated seeds and the average radicle length were *** evaluate the metabolome,the dry biomass(DB)was subjected to extraction with a mixture of methanol-d4 and D2O(1:1 v/v).The extracts were submitted to metabolomics analysis by Proton Nuclear Magnetic *** Relative Germination,Relative Average Radicle Growth and Germination Index increased in all treatments compared to *** the other hand,the DB increased in all treatments,except for ScB300,at doses of 1%and 3%w/*** metabolites(alanine,asparagine,acetic acid,citric acid,glycerol,fatty acids and sucrose)were identified and quantified in DB extracts as the most influential finding for the separation of *** together,these results strongly suggested that biochars accelerated the catabolism of triacylglycerols to sucrose and induced a slight osmotic stress.

关键词： Germination Metabolomics 1H NMR Pyrolysis Sugarcane bagasse

Tailoring the partitioning of proteins using ionic liquids as adjuvants in polymer-polymer aqueous biphasic systems

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Green chemical Engineering 2022年第4期3卷 328-337页

作者： flavia f.Magalhaes Matheus M.Pereira Rita de cassia Superbi de Sousa Ana P.M.Tavares joao A.P.coutinho Mara G.freire cIcEcO-Aveiro Institute of Materials Department of ChemistryUniversity of AveiroAveiro3810-193Portugal Separation Process Laboratory(LPS) Department of Food TechnologyFederal University of Viçosa(UFV)P.H.Rolfs Av.s/n36570-000 ViçosaMGBrazil

Aqueous biphasic systems(ABS)are promising for proteins purification;however,when dealing with samples comprising several proteins,the selectivity towards a target protein is difficult to *** this work,the addition of ionic liquids(ILs)as adjuvants(5 wt%and 10 wt%)in ABS composed of polyethylene glycol(PEG)and dextran was investigated to tailor proteins partitioning between the coexisting *** liquid-liquid phase diagrams were determined at 298 K,followed by partition studies of three proteins(bovine serum albumin(BSA),immunoglobulin G(IgG),and cytochrome c(cyt c)).Partition coefficients of IgG and BSA indicate the preference of both proteins to the dextran-rich phase,whereas cyt c has no preferential partitioning between the *** addition of chloride-based ILs as adjuvants allows to increase or decrease the partition coefficients,thus tailoring the proteins partitioning between the *** partitioning essentially depends on the IL content in each phase,whereas cyt c and IgG partitioning is ruled by the ILs chemical structure and established *** docking was carried out to address the ILs effect on the proteins partitioning,supporting experimental observations,while identifying the specific interactions *** partition of each protein in polymer-salt ABS with ILs as adjuvants was determined,demonstrating the higher tailoring ability of polymer-polymer ABS when adding ***,the partition of each protein in presence of the remaining ones was determined,as well as the selectivity of the studied systems to separate each pair of proteins,paving the way for their use in liquidliquid chromatography.

关键词： Aqueous biphasic systems Polymer-polymer systems Protein partition Ionic liquids Adjuvants

Interpretable discovery of semiconductors with machine learning

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npj computational Materials 2023年第1期9卷 1150-1160页

作者： Hitarth choubisa Petar Todorović joao M.Pina Darshan H.Parmar Ziliang Li Oleksandr Voznyy Isaac Tamblyn Edward H.Sargent Department of Electrical and computer Engineering University of Toronto10 King’s College RoadTorontoON M5S 3G4Canada Department of Physical and Environmental Sciences University of TorontoScarboroughON M1C 1A4Canada Department of Physics University of OttawaOttawaON K1N 6N5Canada Vector Institute for Artificial Intelligence TorontoON M5G 1M1Canada

Machine learning models of material properties accelerate materials discovery,reproducing density functional theory calculated results at a fraction of the cost1–*** bridge the gap between theory and experiments,machine learning predictions need to be distilled in the form of interpretable chemical rules that can be used by *** we develop a framework to address this gap by combining evolutionary algorithm-powered search with machine-learning surrogate *** then couple the search results with supervised learning and statistical *** strategy enables the efficient search of a materials space while providing interpretable design *** demonstrate its effectiveness by developing rules for the design of direct bandgap materials,stable UV emitters,and IR perovskite ***,we conclusively show how DARWIN-generated rules are statistically more robust and applicable to a wide range of applications including the design of UV halide perovskites.

关键词： preta learning perovskite

The hidden half comes into the spotlight: Peeking inside the black box of root developmental phases

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Plant communications 2022年第1期3卷 36-52页

作者： joao Antonio Siqueira Wagner c.Otoni Wagner L.Araujo Departamento de Biologia Vegetal Universidade Federal de Vic¸osaVic¸osaMG 36570-900Brazil

Efficient use of natural resources(e.g.,light,water,and nutrients)can be improved with a tailored developmental program that maximizes the lifetime and fitness of *** plant shoots,a developmental phase represents a time window in which the meristem triggers the development of unique morphological and physiological traits,leading to the emergence of leaves,flowers,and *** developmental phases in plant shoots have been shown to enhance food production in crops,this phenomenon has remained poorly investigated in *** light of recent advances,we suggest that root development occurs in three main phases:root apical meristem appearance,foraging,and *** provide compelling evidence suggesting that these phases are regulated by at least four developmental pathways:autonomous,non-autonomous,hormonal,and *** developmental pathways differentially coordinate organ plasticity,promoting morphological alterations,tissue regeneration,and cell death ***,we suggest how nutritional checkpoints may allow progression through the developmental phases,thus completing the root life *** insights highlight novel and exciting advances in root biology that may help maximize the productivity of crops through more sustainable agriculture and the reduced use of chemical fertilizers.

关键词： developmental transitions plasticity cell fates nutritional checkpoints root development root clock

Improved dark ambient degradation of organic pollutants by cerium strontium cobalt perovskite

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Journal of Environmental Sciences 2020年第4期32卷 110-118页

作者： Huihuang chen Julius Motuzas Wayde Martens joao c.Diniz da costa The University of Queensland FIM^2 Lab-Functional Interfacial Materials and Membranes LaboratorySchool of Chemical EngineeringBrisbaneQld 4072Australia Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaAnhui 230026China Science and Engineering faculty Queensland University of TechnologyBrisbaneQld 4000Australia LAQV-REQUIMTE (Bio)Chemical Process EngineeringDepartment of ChemistryFaculty of Science and TechnologyUniversidade NOVA de LisboaCaparica 2829-516Portugal

This work investigates the effect of cerium substation into strontium cobalt perovskites(ceSrcoO)for the oxidative degradation of OrangeⅡ(OII)in dark ambient conditions without the aid of any external stimulants such as light,heating or chemical *** OII degradation rate by ceSrcoO reached 65%in the first hour,whilst for the blank sample without cerium(SrcoO)took over 2 hr to reach the same level of OII ***,the cerium substitution improved the catalytic activity of the perovskite material,mainly associated with the ce0.1Sr0.9coO3 perovskite *** contacting ceSrcoO,the-N=Nazo bonds of the OII molecules broke down resulting in electron donation and the formation of *** electrons are injected into the ceSrcoO and resulted in a redox pair of co3+/co2+,establishing a bridge for the electron transfer between OII and the ***,the electrons also formed reactive species(·OH)responsible for OII degradation as evidenced by radical trapping *** species were formed via the reaction between 02 and donated electrons from OII with the aid of cobalt redox *** the prepared materials dispensed with the need for light irradiation and additional oxidants,it opens a window of environmental applications for treating contaminated wastewaters.

关键词： Dark catalysis Acid orange degradation cerium substituted perovskite catalytic activity

computational fluid dynamics applied to high temperature hydrogen separation membranes

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frontiers of chemical Science and Engineering 2012年第1期6卷 3-12页

作者： Guozhao JI Guoxiong WANG Kamel HOOMAN Suresh BHATIA joao c. DINIZ da cOSTA School of chemical Engineering the University of Queensland Brisbane 4072 Australia School of Mechanical and Mining Engineering the University of Queensland Brisbane 4072 Australia

This work reviews the development of computational fluid dynamics （cfD） modeling for hydrogen separation, with a focus on high temperature membranes to address industrial requirements in terms of membrane systems as contactors, or in membrane reactor arrange- ments. cfD modeling of membrane,.s attracts interesting challenges as the membrane provides a discontinuity of flow, and therefore cannot be solved by the Navier-Stokes equations. To address this problem, tile concept of source has been introduced to understand gas flows on both sides or domains （feed and permeate） of the membrane. This is an important solution, as the gas flow and concentrations in the permeate domain are intrinsically affected by the gas flow and concentrations in the feed domain and vice-versa. In turn, the source term will depend on the membrane used, as different membrane materials comply with different transport mechanisms, in addition to varying gas selectiv- ity and fluxes. This work also addresses concentration polarization, a common effect in membrane systems, though its significance is dependent upon the performance of the membrane coupled with the operating conditions. finally, cfD modeling is shifting from simplified single gas simulation to industrial gas mixtures, when the mathematical treatment becomes more complex.

关键词： membrane gas separat:ion computationalfluid dynamics concentration polarization hydrogen