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| 1 | Cellulose 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?? | 2015 | Journal of Integrative Plant Biology2015，57，4： | 5 |
| 2 | Synchrotron radiation investigations of the Sr_2MgSi_2O_7:Eu^(2+),R^(3+) persistent luminescence materials显示文摘The electronic and defect energy level structure of polycrystalline Sr2MgSi2O7:Eu2+,R3+ persistent luminescence materials were studied with thermoluminescence and different synchrotron radiation spectroscopies (UV-VUV emission and excitation, X-ray absorption near-edge spectroscopy (XANES) and extended X-ray absorption fine structure (EXAFS)). Special attention was paid on the effect of the R3+ co-dopants on the persistent luminescence properties of the materials. Theoretical calculations using the density functional theory (DFT) were carried out simultaneously with the experimental work. The experimental band gap energy (Eg) value of ca. 7.1 eV agreed very well with the DFT value of 6.7 eV. The variation of the Eg value was attempted to relate with the trap structure as well as with the different properties of the R3+ co-dopants. The trap level energy distribution depended strongly on the R3+ co-dopant except for the shallowest trap energy above the room temperature remaining practically the same, however. The different processes in the mechanism of persistent luminescence from Sr2MgSi2O7:Eu2+,R3+ were assembled and their contributions discussed. | Tuomas Aitasalo Jukka Hassinen Jorma Hls Taneli Laamanen Mika Lastusaari Marja Malkamki Janne Niittykoski Pavel Novák | 2009 | Journal of Rare Earths2009，27，4： | 5 |
| 3 | Comparison of hyperbaric and plain ropivacaine 15 mg in spinal anaesthesia for lower limb surgery显示文摘 | Kallio H Snall EV Tuomas CA Rosenberg PH | 2005 | Br J Anaesth2005，94，1： | 1 |
| 4 | Comparison of hyperbaric and plain ropivacaine 15 mg in spinal anaesthesia for lower limb surgery显示文摘 | KALLIO H SNALL EV TUOMAS CA | 2004 | Br J Anaesth2004，93，5： | 1 |
| 5 | Comparison of hyperbaric and plain ropivacaine 15 mg in spinal anaesthesia for lower limb surgery显示文摘 | Kallio H Snll EVT Tuomas C | 2004 | Br J anaesth2004，93，5： | 1 |
| 6 | Mechanisms of persistent luminescence in Eu^2+ , RE^3+ doped alkaline earth aluminates显示文摘 | Tuomas A Jorma H Hogne J | 2001 | J Lumin2001，9495，： | 1 |
| 7 | Determination of source contributions of NMHCs in Helsinki (601N, 251E) using chemical mass balance and the Unmix multivariate receptor models显示文摘 | Heidi H Hannele H Tuomas L | 2003 | Atmospheric Environment2003，37，： | 1 |
| 8 | Thermodynamics and kinetics of the dehydration of tea-Butyl alcohol 显示文摘 | Maija L H Tuomas O Krause A O | 2004 | Ind Eng Chem Res2004，43，15： | 1 |
| 9 | Comparison of hyperbaric and plain ropivacaine 15 mg in spinal anaesthesia for lower limb surgery显示文摘 | Kallio H Snll EV Tuomas CA | 2004 | Br J Anaesth2004，93，5： | 1 |
| 10 | Clinical efficacy of treat- ment procedures in endodontic infection control and one year follow - up of periapical healing 显示文摘 | TUOMAS W MARTIN T MARKUS H L | 2005 | Clinical research2005，31，12： | 1 |
| 11 | Combination of hyperbaric lidocaine and ropivacaine in spinal anaesthesia for day surgery显示文摘 | Snail EV Tuomas C | 2006 | Eur J Anaesthesiol2006，23，6： | 1 |
| 12 | Comparison of hyperbaric and plain ropivacaine 15 mg in spinal anaesthesia for lower limb surgery显示文摘 | KALLIO H SNALL E V TUOMAS C A | 2004 | Br J Anaesth2004，93，5： | 1 |
| 13 | Ten years of light hydrocarbons (C2-C6) concentration measurements in background air in Finland 显示文摘 | Hannele H Heidi H Tuomas L | 2006 | Atmospheric Environment2006，40，19： | 1 |
| 14 | Comparison of hyperbar-ic and plain ropivacaine 15 mg in spinal anaesthesia for lowerlimb surgery显示文摘 | Kallio H Snll EVT Tuomas C | 2004 | Br J anaesth2004，93，5： | 1 |
| 15 | Forestry Application of High Resolution Imagery 显示文摘 | Tuomas H Mikael H Susanna R and Eija P | 1999 | Machine Vision and Advanced Image Processing in Remote Sensing1999，，： | 1 |
| 16 | AVHRR-based forest proportion map of the Pan-European area 显示文摘 | Tuomas Hme Pauline Stenberg Andersson A J | 2001 | Remote Sensing of Environment2001，77，： | 1 |
| 17 | Comparison of hyperbaric and plain ropivacaine 15 mg in spinal anaesthesia for lower limb surgery显示文摘 | Kallio H Snail EV Tuomas CA | 2005 | Br J Anaesth2005，94，1： | 1 |
| 18 | Vascular Endothelial Growth Factor-B Induces Myocardium-Specific Angiogenesis and Arteriogenesis via Vascular Endothelial Growth Factor Receptor-1– and Neuropilin Receptor-1–Dependent Mechanisms显示文摘 | Johanna E. L?hteenvuo Markku T. L?hteenvuo Antti Kivel? Carolina Rosenlew Annelie Falkevall Joakim Klar Tommi Heikura Tuomas T. Rissanen Elisa V?h?kangas Petra Korpisalo Berndt Enholm Peter Carmeliet Kari Alitalo Ulf Eriksson Seppo Yl?-Herttuala | 2009 | Circulation2009，，6： | 1 |
| 19 | Multiscale analysis and validation of the MODIS LAI product显示文摘 | Yuhong Tian Curtis E Woodcock Yujie Wang Jeff L Privette Nikolay V Shabanov Liming Zhou Yu Zhang Wolfgang Buermann Jiarui Dong Brita Veikkanen Tuomas H?me Kaj Andersson Mutlu Ozdogan Yuri Knyazikhin Ranga B Myneni | 2002 | Remote Sensing of Environment2002，，3： | 1 |
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