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Bridging gap between agro-industrial waste, biodiversity and mycelium-based biocomposites: Understanding their properties by multiscale methodology

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Journal of Bioresources and Bioproducts 2024年第4期9卷 495-507页

作者： Isabel Enriquez-Medina isaac Rodas-Ortiz Isabella Bedoya-garcia AnaMaria Velasquez-Godoy Carlos Alvarez-Vasco Andres Ceballos Bermudez Department of Biological Sciences Bioprocesses and BiotechnologyUniversidad ICESICali 760031Colombia Centro BioInc Universidad ICESI.Cali 760031Colombia

A multiscale methodology approach was employed integrating microscopic analysis of the biomasses present in the biocomposite (lignocellulosic and fungal) to understand their macro- scopic response in terms of physical and mechanical properties. Colombian native strain Gano- derma gibbosum , used for the first time in the production of biocomposites was cultivated on peach palm fruit peel flour and sugar cane bagasse wet dust, individually and as a mixture. During the solid-state fermentation were monitoring the change that occurred in substrate composition such as glucan, arabinoxylan, and lignin through biomass compositional analysis using structural car- bohydrates and lignin. Moreover, fungal biomass formation was monitored via scanning electron microscopy. The resulting biocomposites underwent characterization through flexural and water absorption tests. Our findings indicated that G. gibbosum primarily degraded the polysaccharides in each of the evaluated media. However, lignin degradation to 15.06 g/g was only observed in the mixture biocomposite of peach palm fruit peel fluor and sugarcane bagasse wet dust in a ratio of 1 ꞉1, accompanied by a reduction in glucan and arabinoxylan weights to 26.1 and 7.72 g/g, respectively. This polymer degradation, combined with a protein-rich source in the mix- ture biocomposite of peach palm fruit peel fluor and sugarcane bagasse wet dust in a ratio of 1 ꞉1, facilitated the production of a fungal skin (biological matrix) with a high hyphal density of 65%, contributing to Young’s modulus of 3.83 MPa, elongation without failure, and low wa- ter absorption rate in this biocomposite (55%). The lignocellulosic biomass in the culture media acted as a filler for mechanical interlocking with the matrix and provided attachment points for water absorption. Thus, our study establishes a connection between the microscopic scale and the macroscopic behavior of this biocomposite, assessing structural carbohydrates and lignin analy- sis du

关键词： Mycelium-based composites Multiscale approach Ganoderma gibbosum Biomass analysis Lignocellulosic biomass Mechanical properties

Etching-free pixel definition in InGaN green micro-LEDs

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Light(Science & Applications) 2024年第8期13卷 1655-1665页

作者： Zhiyuan Liu Yi Lu Haicheng Cao Glen isaac Maciel garcia Tingang Liu Xiao Tang Na Xiao Raul Aguileta Vazquez Mingtao Nong Xiaohang Li Advanced Semiconductor Laboratory Electrical and Computer Engineering ProgramCEMSE DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia

The traditional plasma etching process for defining micro-LED pixels could lead to significant sidewall *** near sidewall regions act as non-radiative recombination centers and paths for current leakage,significantly deteriorating device *** this study,we demonstrated a novel selective thermal oxidation(STO)method that allowed pixel definition without undergoing plasma damage and subsequent dielectric *** annealing in ambient air oxidized and reshaped the LED structure,such as p-layers and InGaN/GaN multiple quantum ***,the pixel areas beneath the pre-deposited SiO_(2)layer were selectively and effectively *** was demonstrated that prolonged thermal annealing time enhanced the insulating properties of the oxide,significantly reducing LED leakage ***,applying a thicker SiO_(2)protective layer minimized device resistance and boosted device efficiency *** the STO method,InGaN green micro-LED arrays with 50-,30-,and 10-μm pixel sizes were manufactured and *** results indicated that after 4 h of air annealing and with a 3.5-μm SiO_(2)protective layer,the 10-μm pixel array exhibited leakage currents density 1.2×10^(-6)A/cm^(2)at-10 V voltage and a peak on-wafer external quantum efficiency of~6.48%.This work suggests that the STO method could become an effective approach for future micro-LED manufacturing to mitigate adverse LED efficiency size effects due to the plasma etching and improve device ***-LEDs fabricated through the STO method can be applied to micro-displays,visible light communication,and optical interconnect-based *** planar pixel geometry will provide more possibilities for the monolithic integration of driving circuits with ***,the STO method is not limited to micro-LED fabrication and can be extended to design other III-nitride devices,such as photodetectors,laser diodes,high-electron-mobility transistors

关键词： annealing protective quantum

Foliar persistence and residual activity of methoxyfenozide against beet armyworm （Lepidoptera： Noctuidae）

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Insect Science 2013年第6期20卷 734-742页

作者： Omar-Ulises Aguirre Ana-Mabel Martinez Jesus Campos-garcia Luis-Antonio Hernaindez Jose-isaac Figueroa Philippe Lobit Elisa Vinuela Juan-Manuel Chavarrieta Guy Smagghe Samuel Pineda Instituto de Investigaciones Agropecuarias y Forestales Universidad Michoacana de San Nicolas de Hidalgo Michoacan Instituto de Investigaciones Quimico Biologicas Universidad Michoacana de San Nicolas de Hidalgo Edif. B-3 Ciudad Universitaria CP 58030 Morelia Michoacan Mexico Proteccion de Cultivos Escuela Tecnica Superior de Ingenieros Agronomos Madrid E-28040 Spain Department of Crop Protection Faculty of Bioscience Engineering Ghent University Ghent B-9000 Belgium

A greenhouse study was conducted to investigate the persistence of methoxyfenozide in pepper （Capsicum annuum L.） foliage. An aqueous suspension of methoxyfenozide was sprayed on pepper plants at concentrations of 72 and 144 mg of active ingredient （a.i.）/L. Foliage was collected at different intervals of time （0, 3, 5, 10, 20, 30, 40, and 50 days） after the treatment, and the methoxyfenozide residue was measured by high-performance liquid chromatography. The foliage was also used in bioas- says to determine the residual toxicity on and the consumption rate of the third-instar larvae of the beet armyworm, Spodoptera exigua （Htibner）（Lepidoptera： Noctuidae）. The methoxyfenozide concentrations observed after 50 days had decreased to 19 and 69μg/g per sample, corresponding to a loss of 61% and 28% from the application concentrations of 72 and 144 mg a.i./L, respectively. When fitting a first-order kinetics degradation model, the half-life （DT50） of this compound was 76 days. Both application concentrations of methoxyfenozide caused a high mortality rate （〉97%） when the larvae were fed the pepper foliage collected at all of the time intervals. Lastly, at all of the time points, the consumption rate by the larvae was reduced to between 57% and 92% for both concentrations that were bioassayed. Our results indicate that, under the present greenhouse conditions, the degradation of methoxyfenozide was slower than that reported by other authors and that its residues were highly toxic to S. exigua larvae. The implications of these results for the management programs of this pest are discussed.

关键词： consumption rate foliar persistence methoxyfenozide residue residualactivity Spodoptera exigua

物理冶金信息指导机器学习的镍基单晶高温合金蠕变寿命预测

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中国材料进展 2023年第9期42卷 722-731页

作者：付佳博王晨充 MATEO Carlos Gracia CARABALLO isaac Toda CABALLERO Francisca garcia 于皓东北大学轧制技术及连轧自动化国家重点实验室辽宁沈阳110819 西班牙国家冶金研究中心物理冶金系西班牙马德里28040

蠕变寿命是影响镍基单晶高温合金材料服役寿命和力学性能的关键材料参数。因此,如何准确有效地预测合金的蠕变寿命具有重要现实意义。尽管多年来许多研究学者已经建立起多种蠕变寿命的预测模型,但是由于不同温度应力下的蠕变机制复杂且... 详细信息

蠕变寿命是影响镍基单晶高温合金材料服役寿命和力学性能的关键材料参数。因此,如何准确有效地预测合金的蠕变寿命具有重要现实意义。尽管多年来许多研究学者已经建立起多种蠕变寿命的预测模型,但是由于不同温度应力下的蠕变机制复杂且蠕变过程涉及长时间的显微组织演化,已有模型尚难以实现有效预测。对此,采用物理冶金原理指导下的数据挖掘结合机器学习这一研究策略,通过文献调研建立起了高温低应力下的镍基单晶合金的高质量蠕变数据集,在物理冶金原理指导下对原始数据进行挖掘,提高了原始数据的内在质量,并基于Pearson系数和随机森林平均精确度降低值分别对原始数据特征进行了相关性分析和重要性评估,表明所建立的数据集符合基本的物理冶金学机制,同时阐明了引入的三维物理冶金信息对于蠕变寿命预测的重要意义。随后,基于机器学习方法在数据挖掘后的数据集上对合金的蠕变寿命进行了预测,并根据平方相关系数(R~2)、平均绝对误差(MAE)和过拟合程度评估了不同的机器学习模型。结果表明,支持向量回归(SVR)模型在本研究中具有较好的泛化能力且不容易过拟合,同时结合了物理冶金信息的机器学习模型拥有更好的预测准确性和泛化能力。最终成功地建立起了高温低应力下镍基单晶高温合金成分、工艺以及引入的物理冶金参数和蠕变寿命之间的关系,能够实现对镍基单晶高温合金蠕变寿命的有效预测,并有望应用于基于合金服役条件的成分工艺的反向设计。

关键词：镍基单晶高温合金机器学习蠕变寿命高温低应力

Anemia in patients with high-risk acute coronary syndromes admitted to Intensive Cardiac Care Units

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Journal of Geriatric Cardiology 2020年第1期17卷 35-42页

作者： Victoria Lorente Jaime Aboal Cosme garcia Jordi Sans-Rosello Antonia Sambola Rut Andrea Carlos Tomas Gil Bonet David Vinas Nabil el Ouaddi Santiago Montero Javier Cantalapiedra Margarida Pujol Isabel Hernandez Maria Perez-Rodriguez isaac Llao Jose C Sanchez-Salado Miquel Gual Albert Ariza-Sole 无 Hospital Universitari de Bellvitge L’Hospitalet de LlobregatBarcelonaSpain Hospital Unversitari Josep Trueta GironaSpain Hospital Universitari Germans Trias i Pujol Badalona BarcelonaSpain Hospital de la Santa Creu i Sant Pau Instituto de Investigación Biomedica IIB Sant PauUniversitat Autonoma de Barcelona(UAB)BarcelonaSpain Hospital Universitari de la Vall d’Hebron BarcelonaSpain Hospital Clinic i Provicial BarcelonaSpain Hospital Arnau de Vilanova LleidaSpain Hospital Joan XXIII TarragonaSpain the Grup de Treball de Cures Agudes Cardiologiques de la Societat Catalana de Cardiologia

Background Little information exists about the role of anemia in patients with acute coronary syndromes(ACS)admitted to Intensive Cardiac Care Units(ICCU).The aim of this study was to assess the prevalence of anemia and its impact on management and outcomes in this clinical *** All consecutive patients admitted to eight different ICCUs with diagnosis of non-ST segment elevation ACS(NSTEACS)were prospectively *** was defined as hemoglobin<130 g/L in men and<120 g/L in *** association between anemia and mortality or readmission at six months was assessed by the Cox regression *** A total of 629 patients were *** age was 66.6 years.A total of 197 patients(31.3%)had *** angiography was performed in most patients(96.2%).Patients with anemia were significantly older,with a higher prevalence of comorbidities,poorer left ventricle ejection fraction and higher GRACE score *** with anemia underwent less often coronary angiography,but underwent more often intraaortic counterpulsation,non-invasive mechanical ventilation and renal replacement *** ICCU and hospital stay were significantly longer in patients with *** the incidence of mortality(HR=3.36,95%CI:1.43–7.85,P=0.001)and the incidence of mortality/readmission were significantly higher in patients with anemia(HR=2.80,95%CI:2.03–3.86,P=0.001).After adjusting for confounders,the association between anemia and mortality/readmission remained significant(P=0.031).Conclusions Almost one of three NSTEACS patients admitted to ICCU had *** patients underwent coronary *** was independently associated to poorer outcomes at 6 months.

关键词： Acute coronary syndromes Anemia Intensive cardiac care units Prognosis

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Al-Si合金表面析出行为及调控机制

燕山大学学报 2023年第6期47卷 506-518页

作者：王健东杨兴铭杨寿奎 MATEO Carlos garcia CARABALLO isaac Toda 于皓徐伟东北大学材料科学与工程学院辽宁沈阳110819 东北大学轧制技术及连轧自动化国家重点实验室辽宁沈阳110819 西班牙国家冶金研究中心物理冶金系西班牙马德里28040

表面处理在合金制备过程中应用广泛,其中通过调控表面析出行为来改变表面性质是一种简单易操作的合金表面处理方式。然而目前合金表面析出形核及长大的影响因素不明,制约了析出行为调控的有效实现。本文基于Al-Si合金体系,分别通过改变... 详细信息

表面处理在合金制备过程中应用广泛,其中通过调控表面析出行为来改变表面性质是一种简单易操作的合金表面处理方式。然而目前合金表面析出形核及长大的影响因素不明,制约了析出行为调控的有效实现。本文基于Al-Si合金体系,分别通过改变表面粗糙度及表面应力状态的处理方式,以及分步退火工艺及直接退火工艺的热处理方法,系统性地研究了不同表面状态及不同热处理工艺对表面析出热动力学的影响规律及机制。实验结果表明,直接退火工艺下,表面析出相沿平行于表面方向及垂直表面方向的析出行为与表面粗糙度及应力状态的分布并无明显关联。而在分步退火工艺下,表面析出相表现出显著的沿划痕内部、压痕边部等大曲率表面特异性生长的趋势。对析出行为定量统计以及热动力学机制的分析指出,表面析出相的形核热力学并未受到表面曲率改变的显著影响,而其长大速率在大曲率表面处有较为明显的提高。此现象的发现与机制的阐释可为表面析出行为的定量调控提供指导。

关键词：析出相表面粗糙度表面应力热动力学

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临界退火过程中碳化物临界分解温度对DP-980钢奥氏体硬化性和机械性能的影响

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现代冶金（内蒙古） 2015年第1期 45-49页

作者： Calixto isaac garcia 乔林锁周旨峰

临界退火过程中碳化物分解反应状态严重影响DP-980钢临界状态形成的奥氏体的硬化性和机械性能，研究了0．15C—Nb—Cr—Mo—V钢的碳化物分解特性。

关键词：奥氏体形成碳化物分解双相临界退火温度

Transcatheter mitral valve repair in nonagenarians

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Journal of Geriatric Cardiology 2022年第1期19卷 90-94页

作者： Pedro Luis Cepas-Guillén isaac Pascual Eulogio garcia Pilar Jimenez-Quevedo Alfonso Jurado-Roman Tomás Benito-González Rodrigo Estevez-Loureiro Pedro Li Dabit Arzamendi Bruno Melica Eduardo Infante de Oliveira Pedro Martín Lorenzo Felipe Fernández-Vázquez Guillermo Galeote Luis Nombela-Franco Leire Unzue Pablo Avanzas Manel Sabate Xavier Freixa Cardiology Department Cardiovascular Institute(ICCV)Hospital ClinicIDIBAPSUniversity of BarcelonaBarcelonaSpain Interventional Cardiology Unit Hospital Universitario Central de AsturiasDepartment of MedicineUniversity of OviedoOviedoSpain Servicio de Hemodinámica y Cardiología Intervencionista HM CIEC-Centro Integral de Enfermedades CardiovascularesHospital Universitario HM MontepríncipeHM HospitalesMadridSpain Facultad de Medicina Universidad CEU San PabloMadridSpain Cardiology Department Cardiovascular InstituteHospital Clínico San CarlosIdISSCMadridSpain Division of Interventional Cardiology University Hospital La PazIdiPAZCIBER-CVMadridSpain Department of Cardiology University Hospital of LeónLeónSpain Interventional Cardiology Unit HospitalÁlvaro CunqueiroVigoSpain Interventional Cardiology Unit Hospital Sant Pau i Santa CreuBarcelonaSpain Serviço de Cardiologia Centro Hospitalar de Vila Nova de Gaia/Espinho-EPEVila Nova de GaiaPortugal Serviço de Cardiologia Hospital de Santa MariaCentro Hospitalar Lisboa NorteCentro Académico Médico de LisboaLisboaPortugal Servicio de Cardiología Hospital Universitario de Gran Canaria Dr.NegrínLas Palmas de Gran CanariaSpain

Given the increase in life expectancy indeveloped countries,nonagenarian population will become clinically and numerically relevant in our daily routine practice in the near *** has been observed to exert a profound influence on the prevalence of severe mitral regurgitation (MR) in the population.[1]Mitral valve surgery remains the gold standard of care for patients with symptomatic severe MR.

关键词： mitral routine surgery

New pearlitic steels for 21st century rail applications

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Baosteel Technical Research 2010年第S1期4卷 59-页

作者： R ORDONEZ C isaac garcia Semih KALAY Anthony J DEARDO The Basic Metals Processing Research Institute Department of Mechanical Engineering and Materials Science University of Pittsburgh PittsburghPennsylvania 15261USA Transportation Technology Corporation Inc PuebloCO 81001 Department of Mechanical Engineering University of Oulu P.O.Box 4200(Linnanmaa) FIN-90014Finland

To improve competitiveness,the nation's railroads have increased the axle loads and speed of the *** has led to a rapid decrease in the life expectancy of premium rails through accelerated wear,rolling contact fatigue and *** counter this effect,the railroads need rails that exhibit better performance in these areas.A research program has been initiated to study the microstructural aspects of near-eutectoid steels that would improve these *** first phase of the work was to carefully characterize the existing commercial rail steels in terms of pearlite interlamellar spacing,steel cleanliness and the presence of pro-eutectoid cementite on prior-austenite *** characterizations were then correlated with both mechanical properties and overall rail *** second phase of the program was to develop a better microstructure through control of composition,thermomechanical processing and cooling *** was achieved through the use of laboratory-melted heats of experimental near-eutectoid compositions and a computer controlled MTS compression machine modified for axisymmetric compression testing and subsequent controlled *** optimum processing route for these new steels has been determined,and pilot-scale heats have been melted,hot rolled and cooled using the information gained from the MTS *** mechanical properties of these new steels have been determined and the rail performance tests are being conducted using laboratory-scale ***,these new rail steels will be tested under commercial conditions on the TTCI test track in Pueblo,*** paper will report on the alloy and processing design and resulting properties of the steels developed in this research *** for future rail compositions and processing to obtain improved properties and performance will be presented.

关键词： rail steels interlamellar spacing pearlite colony pro-eutectoid cementite