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Mechanical Properties, Microstructure and Surface Quality of Polypropylene Green Composites as a Function of Sunflower Husk Waste Filler Particle Size and Content

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Journal of Renewable Materials 2021年第5期9卷 841-853页

作者： Mateusz Barczewski jacek andrzejewski Radomir Majchrowski Kamil Dobrzycki Krzysztof Formela Poznan University of Technology Institute of Materials TechnologyPoznanPoland Poznan University of Technology Institute of Mechanical TechnologyPoznanPoland Gdansk University of Technology Department of Polymer TechnologyFaculty of ChemistryGabriela Narutowicza 11/12GdanskPoland

Agricultural waste is a still untapped source of materials that can,in case of proper utilization,significantly improve the sustainability of polymers and their *** this work,polymer composites based on isotactic polypropylene were produced incorporating ground sunflower husk in the amount of 10 wt%and 20 wt%.The work’s main objective is to evaluate how preliminary fractioning of this agricultural waste filler affects the thermomechanical properties,microstructure and surface topology of polypropylene-based injection molded compo*** composites were analyzed for mechanical properties(tensile,impact strength and hardness),thermomechanical properties(Vicat softening point VST,heat deflection temperature HDT,and dynamic thermomechanical analysis DMTA)with reference to morphological changes evaluated using scanning electron microscopy(SEM).The quality of the produced composites was assessed on the basis of the analysis of the surface topology of the injected *** has been shown that the larger particle size of used filler has a direct impact on increasing composite stiffness in the room and elevated ***,a relationship was demonstrated between the size of the filler and the deterioration of the tensile strength in the case of composites with a higher content of *** results show that the addition of sunflower husk as a particle-shaped waste filler is an effective method to increase sustainability of polypropylene-based green composites with beneficial thermomechanical properties and to reduce the residue of sunflower husk from industrial oil production.

关键词： Polypropylene sunflower husk green composite waste filler structure-property relationships

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A chromosome-level,haplotype-phased Vanilla planifolia genome highlights the challenge of partial endoreplication for accurate wholegenome assembly

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Plant Communications 2022年第5期3卷 117-131页

作者： Quentin Piet Gaetan Droc William Marande Gautier Sarah Stephanie Bocs Christophe Klopp Mickael Bourge Sonja Siljak-Yakovlev Olivier Bouchez Ce line Lopez-Roques Sandra Lepers-andrzejewski Laurent Bourgois Joseph Zucca Michel Dron Pascale Besse Michel Grisoni Cyril Jourda Carine Charron CIRAD UMR PVBMT97410 Saint-PierreLa ReunionFrance CIRAD UMR AGAP Institut34398 MontpellierFrance UMR AGAP Institut Univ MontpellierCIRADINRAEInstitut Agro34398 MontpellierFrance French Institute of Bioinformatics(IFB)-South Green Bioinformatics Platform BioversityCIRADINRAEIRD34398 MontpellierFrance INRAE CNRGVGenotoul31326 Castanet-TolosanFrance AGAP Univ.MontpellierCIRADINRAEMontpellier SupAgroMontpellierFrance Plateforme Bioinformatique GenotoulBioinfoMicsUR875 Biometrie et Intelligence ArtificielleINRAECastanet-TolosanFrance Cytometry Facility Imagerie-GifUniversite Paris-SaclayCEACNRSInstitute for Integrative Biology of the Cell(I2BC)91198 Gif-sur-YvetteFrance Universite Paris-Saclay CNRSAgroParisTechEcologie Syste matique Evolution(ESE)91190 Gif-sur-YvetteFrance INRAE GeT-PlaGeGenotoul31326 Castanet-TolosanFrance Etablissement Vanille de Tahiti UturoaFrench PolynesiaFrance Eurovanille Rue de Maresquel62870 Gouy Saint AndreFrance De partement Biotechnologie V.Mane Fils06620 Le Bar Sur LoupFrance Universite Paris-Saclay CNRSINRAEUniv.EvryInstitute of Plant Sciences Paris-Saclay(IPS2)91405 OrsayFrance Universite de la Re union UMR PVBMTSaint-PierreLa Re unionFrance CIRAD UMR PVBMT501 TamataveMadagascar

Vanilla planifolia, the species cultivated to produce one of the world’s most popular flavors, is highly proneto partial genome endoreplication, which leads to highly unbalanced DNA content in cells. We report herethe first molecular evidence of partial endoreplication at the chromosome scale by the assembly and annotation of an accurate haplotype-phased genome of V. planifolia. Cytogenetic data demonstrated that thediploid genome size is 4.09 Gb, with 16 chromosome pairs, although aneuploid cells are frequentlyobserved. Using PacBio HiFi and optical mapping, we assembled and phased a diploid genome of 3.4 Gbwith a scaffold N50 of 1.2 Mb and 59 128 predicted protein-coding genes. The atypical k-mer frequenciesand the uneven sequencing depth observed agreed with our expectation of unbalanced genome representation. Sixty-seven percent of the genes were scattered over only 30% of the genome, putatively linkinggene-rich regions and the endoreplication phenomenon. By contrast, low-coverage regions (non-endoreplicated) were rich in repeated elements but also contained 33% of the annotated genes. Furthermore, this assembly showed distinct haplotype-specific sequencing depth variation patterns, suggesting complexmolecular regulation of endoreplication along the chromosomes. This high-quality, anchored assemblyrepresents 83% of the estimated V. planifolia genome. It provides a significant step toward the elucidationof this complex genome. To support post-genomics efforts, we developed the Vanilla Genome Hub, a userfriendly integrated web portal that enables centralized access to high-throughput genomic and other omicsdata and interoperable use of bioinformatics tools.

关键词： vanilla whole-genome sequencing optical mapping partial endoreplication genome hub

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利用时间串联质谱方法测定高脂肪食品中低于PPT级的2，3，7，8氯代二苯二恶英和氯代二苯呋喃

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现代科学仪器 1999年第3期 52-55页

作者： Douglas G Hayward Kim Hooper Denls andrzejewski

离子阱串联质谱方法的检出限通过对花生油、羔羊脂肪和黄油中２，３，７，８多氯代二苯二恶英（ＰＣＤＤs）和多氯代二苯呋喃（ＰＣＤＦｓ）的反复测定进行了评价，在黄油中可观测到１０种同系物（范围０．２７一２．５ｐｇ／ｇ），羔... 详细信息

离子阱串联质谱方法的检出限通过对花生油、羔羊脂肪和黄油中２，３，７，８多氯代二苯二恶英（ＰＣＤＤs）和多氯代二苯呋喃（ＰＣＤＦｓ）的反复测定进行了评价，在黄油中可观测到１０种同系物（范围０．２７一２．５ｐｇ／ｇ），羔羊脂肪中可测到９种（范围０．０９－２６ｐｇ／ｇ），并且所得结果精确性良好。在高脂肪食品中，对大多数的多氯代二苯二恶英／呋喃，可在０．５ｐｇ／ｇ的水平达到准确和可重复的结果（七氯代二苯二恶英和七氯代二苯呋喃为１．０ｐｇ／ｇ，八氯代二苯呋喃为２．０ｐｇ／ｇ），而对于２，３，７，８四氯代二苯二恶英和２，３，７，８四氯代二苯呋喃可达到０．２ｐｇ／ｇ。离子阱串联质谱方法在分析鲶鱼和鸡蛋中的２，３，７，８四氯代二苯二恶英方面性能卓越，所分析的样品来自美国大陆的大多数地区。该方法还用于羔羊脂肪、黄油和取自Ｋａｚａｋｈｓｔａｎ乡村的棉子油中的四氯代二苯二恶英污染的测定。由该方法对鲶鱼和鸡蛋样品的重复分析表明其结果可与高分辨质谱方法相媲美。

关键词：高脂肪食品子阶检出限二恶英二噁英串联质谱呋喃氧茂氯代 PPT

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