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Urban Plant Biomass Residues from the neotropics and Their Potential for Thermal Energy Generation

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Journal of Renewable Materials 2023年第9期11卷 3547-3566页

作者： John Freddy Gelves Díaz Ludovic Dorkis Richard Monroy-Sepúlveda sandra Rozo-Rincón Gabriel de Jesús Camargo Vargas Competitiveness and Sustainability for Development Research Group Faculty of EngineeringUniversidad Libre-Cúcuta SectionalCúcutaColombia Catalysis and nanomaterials Research Group Faculty of MinesUniversidad Nacional de Colombia-Medellín SectionalMedellínColombia Detecal Research Group Faculty of EngineeringUniversidad Libre-BogotáSectionalBogotáColombia

The material associated with tree pruning in a city in the Colombian neotropics was characterized in order to determine its energy potential.The species studied for their relevance in the territory were Prosopis juliflora,Licania tomentosa,Terminalia catappa,Azadirachta indica,Pithecellobium dulce,Ficus benjamina and Leucaena leucocephala.Moisture content,bulk density,hygroscopic response,elemental chemical analysis,proximal analysis,calorific value,ease of ignition and combustion,thermogravimetric and heat flow analysis,steam generation capacity,and qualitative analysis of gases(mass spectrometry)were determined.The results that were obtained show high initial moisture contents that vary between 37%and 67%and a variable density(when dry)between 0.21 and 0.41 g/cm3.Chemically,it was shown that all residues have lower carbon and sulfur content compared to a reference mineral coal.However,the residues of some species have higher nitrogen contents compared to the same coal.All biomasses are characterized by their high content of volatile fractions and by having a lower content of inorganic matter compared to carbon.The lower calorific values of these residues are between 14170 and 16928 kJ/kg,which are not negligible compared to other biomasses.This characteristic would be related to the high presence of hemicellulose in the residues.Flue gas monitoring revealed that there are different airflow needs in order to ensure complete combustion.Steam generation tests showed that the calorific value should not be the most relevant criterion to establish the potential use of the waste,since leucaena leucocephala,despite having the highest calorific value,was the material with the lowest performance in steam generation.

关键词： Calorific value characterization combustion combustible material urban flora

Parkinson's Disease:A Multisystem Disorder

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neuroscience Bulletin 2023年第1期39卷 113-124页

作者： Helena nunes Costa Ana Raquel Esteves nuno Empadinhas sandra Morais Cardoso CnC–Center for neuroscience and Cell Biology and CIBB–Center for Innovative Biomedicine and Biotechnology University of Coimbra3004-504CoimbraPortugal IIIUC–Institute for Interdisciplinary Research University of Coimbra3004-504CoimbraPortugal Faculty of Medicine University of Coimbra3004-504CoimbraPortugal

The way sporadic Parkinson's disease(PD)is perceived has undergone drastic changes in recent decades.For a long time,PD was considered a brain disease characterized by motor disturbances;however,the identification of several risk factors and the hypothesis that PD has a gastrointestinal onset have shed additional light.Today,after recognition of prodromal non-motor symptoms and the pathological processes driving their evolution,there is a greater understanding of the involvement of other organ systems.For this reason,PD is increasingly seen as a multiorgan and multisystemic pathology that arises from the interaction of susceptible genetic factors with a challenging environment during aging-related decline.

关键词： Parkinson's disease Gut microbiome Intestinal barrier α-Synuclein Blood-brain barrier

Greasy hair against obesity

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Signal Transduction and Targeted Therapy 2022年第1期7卷 11-12页

作者： sandra nickel Bruno Christ Department of General Visceral and Vascular SurgeryJena University Hospital07740 JenaGermany Cell Transplantation/Molecular Hepatology Lab Department of VisceralTransplantThoracic and Vascular SurgeryUniversity of Leipzig Medical Center04103 LeipzigGermany

In their article,Choa et al.open the perspective to loose fat by in creasing seboge nesis.Envisioning a T cell-depe ndent mechanism,they suggest that stimulation of sebum production by thymic stromal lymphopeietin(TSLP)"pulls"lipids out of the adipose tissue.^(1) The World Population Review(***/)ranks obesity rates to one third of the global population.Associated co-morbidities comprise diabetes type 2,ischemic stroke and cardiovascular complications render this epidemic disease the number 1 cause of deaths worldwide(who.int/).

关键词： obesity al stimulation

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英语语境语法 [影印版]

采用碳酸酐酶的微藻直接空气碳捕集固碳性能强化研究

丛书名：英语语境语法系列

2006年

作者： (美)sandra n. Elbaum

本书教给学生通过语境学习英语语言，书中将英语语法学习与美国文化语境结合起来，按循序渐进的原则安排语法点，每个语法点以图表方式解释其形式、用途、语序、主语、相关结构等。

ISBN: (数字)7301082703

ISBN: (纸本)CNA200600100

关键词：语法

来源：畅想之星图书光盘版（南... 评论

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西安交通大学学报 2024年

作者：王睿龙李明佳 sandra Kentish 北京理工大学机械与车辆工程学院西安交通大学能源与动力工程学院热流科学与工程教育部重点实验室 Department of Chemical Engineering The University of Melbourne

为了解决低浓度二氧化碳(CO2)环境下微藻光生物反应器内CO2传质效率差、溶解度低的问题，制备了碳酸酐酶(CA)附着的尼龙纤维膜，利用CA催化转化CO2为碳酸氢根的性质，提出了一种可以改善微藻溶液中CO2溶解度及转化率的新型光生物反应器... 详细信息

为了解决低浓度二氧化碳(CO2)环境下微藻光生物反应器内CO2传质效率差、溶解度低的问题，制备了碳酸酐酶(CA)附着的尼龙纤维膜，利用CA催化转化CO2为碳酸氢根的性质，提出了一种可以改善微藻溶液中CO2溶解度及转化率的新型光生物反应器，测试了该反应器放置CA附着尼龙纤维漂浮膜前后的微藻培养和固碳性能，并进一步探究了膜的开孔率及CA附着量对微藻固碳效率的影响。结果表明：所制备的CA附着的尼龙纤维膜对CO2转化速率提升了62.7%，通过耐久性测试，CA的活性在5个培养周期后仍保持良好，性能衰减仅为11.3%；与传统气石鼓气方式相比，提出的新型光生物反应器的微藻生物质产量提高了29.7%，固碳效率提升了65%；随着膜开孔率的增加和透光率的增加，单位CA负载量的固碳效率提高，开孔面积占比24.75%的对照组的单位CA固碳率相比不开孔提高了13%。该研究为进一步提高微藻直接空气捕集的固碳效率提供了一种新的方法。

关键词：微藻光生物反应器直接空气碳捕集碳酸酐酶尼龙纤维膜