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Synchrotron X-ray microtomog.aphy and multifractal analysis for the characterization of pore structure and distribution in softwood pellet biochar

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Biochar 2021年第4期3卷 671-686页

作者： Franziska Srocke Liwen Han Pierre Dutilleul Xiang.ui Xiao Donald L.Smith ondřej Mašek Department of Plant Science Macdonald CampusMcGill University21111 Lakeshore RoadSte-Anne-de-BellevueQuebec H9X 3V9Canada UK Biochar Research Centre School of GeosciencesUniversity of EdinburghKing’s BuildingsAlexander Crum Brown RoadEdinburgh EH93FFUK Advanced Photon Source Argonne National LaboratoryLemontIL 60439USA Present Address:National Synchrotron Lig.t Source II UptonNY 11973USA

Biochar pores in the micrometer rang.(1-100μm)derive from cellular structures of the plant biomass subjected to pyrolysis or can be the result of mechanical processing.such as *** this study,synchrotron X-ray microtomog.aphy was used to investig.te the internal pore structure of softwood pellet biochar produced by slow pyrolysis at 550 and 700°*** microtomog.aphic data sets consisted of 2025 imag.s of 2560×2560 voxels with a voxel side leng.h of 0.87μ*** three-dimensional reconstructions revealed that pelleting.and pyrolysis sig.ificantly altered the pore structures of the wood feedstock,creating.a network of connected pores between frag.ents that resembled the wood *** hig.er pyrolysis temperature increased the specific surface area(as determined by BET nitrog.n adsorption),it did not affect the total observed *** analysis was applied to assess the characteristics of the frequency distribution of pores along.each of the three dimensions of reconstructed imag.s of five softwood pellet biochar *** resulting.sing.lar-ity and Rényi spectra(g.neralized dimensions)indicated that the distribution of porosity had monofractal scaling.behavior,was homog.neous within the analyzed volumes and consistent between replicate ***,the pore distributions were isotropic(direction-independent),which is in strong.contrast with the anisotropic pore structure of *** pores at the scale analyzed in this study are relevant,for example,for the supply of plant accessible water and habitable space for microorg.nisms,our finding. combined with the ability to reproduce biochar with such pore distribution offer substantial advantag.s in various biochar applications.

关键词： Biochar Pore structure X‐ray microtomog.aphy Homog.neity Isotropy Multifractal analysis

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Neurolysis of the Median Nerve to the Carpal Canal by the Way Mini-Open: Review of 68 Files at Brazzaville University Hospital

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Surg.cal Science 2017年第12期8卷 510-518页

作者： Massamba Miabaou Didace Boukassa Léon Lamini Norbert Massouama Rég.s Monka Marius ondélé Ng.tsé Bileckot Richard Ntsiba Honoré Multipurpose Surg.ry Department Brazzaville University Hospital Brazzaville Congo Rheumatolog. Department CHU Brazzaville Brazzaville Congo Department of Traumatolog.-Orthopedics University Hospital of Brazzaville Brazzaville Congo Anesthesia-Resuscitation Department University Hospital of Brazzaville Brazzaville Congo Functional Rehabilitation Department Brazzaville University Hospital Brazzaville Congo

Objective: To evaluate the results of neurolysis of the median nerve to the carpal tunnel in patients operated by the mini-open technique. Methods: The prospective study included 68 patients (16 men and 52 women) ag.d 43 to 80 years (mean ag.: 64 years). Patients were evaluated in pre- and post-operative by a questionnaire. The mini open technique with cutaneous approach to the heel of the hand following.the 4th ray was performed in all patients under local, locoreg.onal or g.neral anesthesia. Results: The results were evaluated in 3 consultations, in the 1st, 3rd and 6th month. We obtained very g.od results in 54.4% of the cases (n = 37) and 30.9% (n = 21) of g.od results and 14.70% (n = 10) of poor results. No vascular, tendinous or neurolog.cal complications were noted. Two patients were reoperated for incomplete resection of the carpal ring.lig.ment. The mini-open technique has achieved g.od results in all neurolysis despite the delay in surg.cal manag.ment. Conclusion: The results of the surg.cal treatment of the carpal tunnel syndrome depend on the precocity of the diag.osis and the surg.cal indication.

关键词： Neurolysis Median Nerve Carpal Tunnel Mini-Open Technique

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Physics prospects of the Jinping.neutrino experiment

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Chinese Physics C 2017年第2期41卷 9-32页

作者： John *** 陈少敏程建平 Sayed N.Doustimotlag. 高原宁龚光华宫辉郭磊韩然何红建黄性涛李荐民李金李默涵李学潜廖玮林贵林刘佐伟 William Mc Donoug. ondˇrej rmek 唐健万林焱王元清王喆王综轶魏瀚宇习宇飞徐晔许勋杰杨振伟姚春发 Minfang.Yeh 岳骞张黎明张洋赵志宏郑阳恒周详朱相雷 Kai Zuber Dept. of Physics Dept. of Astronomy and CCAPP The Ohio State University Department of Eng.neering.Physics Tsinghua University Science and Technolog. on Reliability and Environmental Eng.neering.Laboratory Beijing Institute of Spacecraft Environment Engineering School of Physics Shandong University School of Physics Nankai University Institute of Modern Physics East China University of Science and Technology Institute of Physics National Chiao-Tung University University of Maryland College Park Department of g.ophysics Faculty of Mathematics and Physics Charles University in Prague School of Physics Sun Yat-Sen University Department of Civil Eng.neering Tsinghua University Institute of Hydrog.olog. and Environmental g.olog. Chinese Academy of Geological Sciences Fujian University of Technolog. Department of Structural Steels China Iron & Steel Research Institute Group Brookhaven National Laboratory School of Physical Sciences University of Chinese Academy of Sciences School of Physics and Technolog. Wuhan University Institut für Kern- und Teilchenphysik Technische Universitt Dresden

The China Jinping.Underg.ound Laboratory（CJPL）, which has the lowest cosmic-ray muon flux and the lowest reactor neutrino flux of any laboratory, is ideal to carry out low-energ. neutrino experiments. With two detectors and a total fiducial mass of 2000 tons for solar neutrino physics（equivalently, 3000 tons for g.o-neutrino and supernova neutrino physics）, the Jinping.neutrino experiment will have the potential to identify the neutrinos from the CNO fusion cycles of the Sun, to cover the transition phase for the solar neutrino oscillation from vacuum to matter mixing. and to measure the g.o-neutrino flux, including.the Th/U ratio. These g.als can be fulfilled with mature existing.techniques. Efforts on increasing.the targ.t mass with multi-modular neutrino detectors and on developing.the slow liquid scintillator will increase the Jinping.discovery potential in the study of solar neutrinos,g.o-neutrinos, supernova neutrinos, and dark matter.

关键词： CJPL Jinping.neutrino experiment solar neutrino g.o-neutrino supernova neutrino

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