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9篇 您的检索式:作者名="Ritva P"
    题名 作者 年代 出处 被引量
1Cellulose structure and lignin distribution in normal and compression wood of the Maidenhair tree(Ginkgo biloba L.)显示文摘We studied in detail the mean micro fibril angle and the width of cellulose crystals from the pith to the bark of a 15-year-old Maidenhair tree(Ginkgo biloba L.). The orientation of cellulose micro fibrils with respect to the cell axis and the width and length of cellulose crystallites were determined using Xray diffraction. Raman microscopy was used to compare the lignin distribution in the cell wall of normal/opposite and compression wood, which was found near the pith. Ginkgo biloba showed a relatively large mean micro fibril angle,varying between 19° and 39° in the S2 layer, and the average width of cellulose crystallites was 3.1–3.2 nm. Mild compression wood without any intercellular spaces or helical cavities was observed near the pith. Slit-like bordered pit openings and a heavily lignified S2 L layer con firmed the presence of compression wood. Ginkgo biloba showed typical features present in the juvenile wood of conifers. The micro fibril angle remained large over the 14 annual rings. The entire stem disc,with a diameter of 18 cm, was considered to consist of juvenile wood. The properties of juvenile and compression wood as well as the cellulose orientation and crystalline width indicate that the wood formation of G. biloba is similar to that of modern conifers.Seppo Andersson Yurong Wang Raili P?nni Tuomas H?nninen Marko Mononen Haiqing Ren Ritva Serimaa Pekka Saranp?? 2015Journal of Integrative Plant Biology2015,57,4:5
2ApoE基因对急性缺血性脑卒中的影响:磁共振成像研究显示文摘ApoEε4等位基因对急性缺血性脑卒中兼具危害和保护效应。ApoEε4等位基因的危害效应表现在梗死体积增加更多,脑组织损伤的血供阈值低,病人临床愈后与影像学发现不成比例。但是ApoEε4等位基因携带者有更完好的侧支循环。涉及ApoEε4等位基因和临床愈后的研究显示,危害和保护效应可能会相互抵消。在今后的缺血性脑卒中影像学和临床愈后研究中,ApoEε4等位基因干扰效应需要加以控制。刘亚武 Pivi Hartikainen Ritva L.Vanninen 2010国际医学放射学杂志2010,33,5:2
3Effects of Composted Pulp and Paper Industfidustry Wastewater Treatment on Soil Properties And Cereal Yield显示文摘JOUKO S RITVA M K RANTALA P R 2004Compost Science and Utilization2004,11,3:1
4Effect of amylose content on physical and mechanical properties of potato starch based edible films 显示文摘RIKU A T MARKO P RITVA S 2008Biomacromolecules2008,9,2:1
5Expression of growth factor receptors flg and bek during hepatic ontogenesis and regeneration in the rat显示文摘Zongyi H Ritva P Kozo F 1995Cell Growth Differ1995,6,8:1
6A pharmacokinetic study of ethyl glucu- ronide in blood and urine:Applications to forensic toxicology 显示文摘Gudrun H Jean P B Ritva K 2007Fo- rensic Sci Int2007,172,:1
7Effeet of amyLose content on physical and mechanical properties of potato-starch-based edible films 显示文摘Riku A T Marko P Ritva S 2008Biomacromoleeules2008,,2:1
8Metalized polyimide filters for X-ray astronomy and other applications显示文摘Forbes R P Ritva A M Keski-Kuha 1997SPIE1997,31,13:1
9Increased hyaluronan content and stromal cell CD44 associate with HER2 positivity and poor prognosis in human breast cancer显示文摘P?ivi Auvinen Raija Tammi Veli‐Matti Kosma Reijo Sironen Ylermi Soini Arto Mannermaa Ritva Tumelius Eliisa Uljas Markku Tammi 2012Int J Cancer2012,,3:1
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