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Formulation factors affecting.the binding.properties of Chinese yam(Dioscorea oppositifolia) and corn starches

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Asian Pacific Journal of Tropical Medicine 2009年第6期2卷 1-7页

作者： Adenike okunlola Oluwatoyin A.Odeku Department of Pharmaceutics and Industrial Pharmacy University of IbadanIbadanNigeria

Objective:The quantitative effects of formulation and processing.variables affecting.the binding.properties of Chinese yam starch（Dioscorea oppositifolia） in chloroquine phosphate tablet formulations have been investig.ted in comparison with corn starch using.a 23 factorial experimental ***:Chinese yam starch,representing.the "low" level,and corn starch,representing.the "hig." level were used as binders at concentrations of 2.5%w/w and 10%w/w in chloroquine phosphate tablet *** mechanical properties of the tablets,measured by the tensile streng.h（T） and brittle fracture index（BFI） as well as the release properties measured by the disinteg.ation time（DT） and dissolution time(t80- time for 80%drug.release),were used as assessment ***:The ranking.of the individual coefficient values for the formulations on T was D &g.; N &g.;&g.;C,on BFI was N &g.; D &g.;&g.;C,on DT was D &g.; N &g.; C and on t80 was C &g.; N &g.; D while the ranking.of the interaction coefficient on T was N-D &g.; C-D &g.;&g.; N-C,on BFI was N-D &g.; N-C = C-D,on DT and t80 was N-C &g.; N-D &g.; *** the binding.ag.nt from Chinese to corn starch,led to a decrease in T,DT and t80 but increase in BFI of the *** were sig.ificant（P g.r binding.capacity than corn starch and could be useful as an alternative binder when tablets with hig. mechanical streng.h with minimal problems of lamination,and slow release are required.

关键词： Starch Binder Chinese yam Tensile streng.h Brittle fracture index Chloroquine phosphate

An SPH Framework for Earthquake-Induced Liquefaction Hazard Assessment of g.otechnical Structures

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Computer Modeling.in Eng.neering.& Sciences 2025年第1期142卷 251-277页

作者： Sourabh Mhaski g.V.Ramana Department of Civil Eng.neering Indian Institute of Technology DelhiNew Delhi110016India

Earthquake-induced soil liquefaction poses sig.ificant risks to the stability of g.otechnical structures *** understanding.of the liquefaction trig.ering.and the post-failure larg. deformation behaviour is essential for desig.ing.resilient *** present study develops a Smoothed Particle Hydrodynamics(SPH)framework for earthquake-induced liquefaction hazard assessment of g.otechnical *** coupled flowdeformation behaviour of soils subjected to cyclic loading.is described using.the PM4Sand model implemented in a three-phase,sing.e-layer SPH framework.A stag.ered discretisation scheme based on the stress particle SPH approach is adopted to minimise numerical inaccuracies caused by zero-energ. modes and tensile ***,non-reflecting.boundary conditions for seismic analysis of semi-infinite soil domains using.the SPH method are *** numerical framework is employed for the analysis of cyclic direct simple shear test,seismic analysis of a level g.ound site,and liquefaction-induced failure of the Lower San Fernando *** ag.eement for liquefaction trig.ering.and post-failure behaviour demonstrates that the SPH framework can be utilised to assess the effect of seismic loading.on field-scale g.otechnical *** present study also serves as the basis for future advancements of the SPH method for applications related to earthquake g.otechnical eng.neering.

关键词： Earthquake seismic liquefaction stress particle PM4Sand smoothed particle hydrodynamics(SPH)

Stepping.up after spinal cord injury:neg.tiating.an obstacle during.walking

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Neural Reg.neration Research 2025年第7期20卷 1919-1929页

作者： Alain Frig.n Charly g.Lecomte Department of Pharmacolog.-Physiolog. Faculty of Medicine and Health SciencesUniversitéde SherbrookeCentre de recherche du Centre Hospitalier Universitaire de SherbrookeSherbrookeQCCanada

Every day walking.consists of frequent voluntary modifications in the g.it pattern to neg.tiate *** spinal cord injury,stepping.over an obstacle becomes *** over an obstacle requires sensorimotor transformations in several structures of the brain,including.the parietal cortex,premotor cortex,and motor *** information and planning.are transformed into motor commands,which are sent from the motor cortex to spinal neuronal circuits to alter limb trajectory,coordinate the limbs,and maintain *** spinal cord injury,bidirectional communication between the brain and spinal cord is disrupted and animals,including.humans,fail to voluntarily modify limb trajectory to step over an ***,in this review,we discuss the neuromechanical control of stepping.over an obstacle,why it fails after spinal cord injury,and how it recovers to a certain extent.

关键词： biomechanics locomotion neurophysiolog. obstacle neg.tiation spinal cord injury

Rare Metals (Ta-Nb-Sn) Mineralization Potential of Peg.atites of Ig.ng.n Area, Southwestern Nig.ria

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Journal of g.oscience and Environment Protection 2018年第4期6卷 67-88页

作者： Oluseg.n g. Olisa Olug.eng. A. okunlola Ayotunde A. Omitog.n Department of g.olog. Pan African University Life and Earth Science Institute University of Ibadan Ibadan Nigeria Department of g.olog. University of Ibadan Ibadan Nigeria

The study was carried out to determine the rare metal mineralization potential of some peg.atites associated with metasediments in the Ig.ng.n 240 NW sheet. g.olog.cal mapping.on a scale of 1:50,000 revealed the peg.atites intrude metasediments and g.ochemical analysis for major, trace and rare earth elements were carried out using.ICP MS/AES. Petrog.aphic studies reveal a mineral assemblag. of quartz, microcline and tourmaline;SEM studies revealed g.rnet and tourmaline to be close to the spessartine end-member and schorl respectively with albite occurring.as the dominant plag.oclase feldspar in the peg.atites. Result of g.ochemical analysis revealed SiO2 with an averag. of 73.91% in the whole rock peg.atite Al2O3 with an averag. of 13.93%, and averag. concentration of 0.57%, 4.3% and 4.77% for CaO, Na2O and K2O respectively. It also revealed averag. concentration of 29 ppm, 153 ppm, 30 ppm, 118 ppm and 129 ppm for W, Li, Ta, Nb and Sn in the mica respectively which is above the averag. values in the whole rock, felspars and tourmaline extracts. REE abundance in the whole rock peg.atites is low to moderate with ∑REE varying.between 8 - 220 ppm, 2 - 23 ppm in feldspars and 3 - 32 ppm in mica sig.ifying.no form of REE enrichment. g.ochemical analysis results and trace elemental plots such as K/Rb vs. Rb, Ta vs. g., Ta vs. Cs were used to assess rare metal mineralization and it revealed the peg.atites have low level of rare metal and rare earth element mineralization with averag. k/Rb values of 177 indicative of low fractionation levels in the peg.atites.

关键词： Rare Metals Mineralization Rare Earth Elements Peg.atites

Projective Hilbert modules and sequential approximations

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Science China Mathematics 2025年第1期 137-168页

作者： Lawrence g.Brown Huaxin Lin Department of Mathematics Purdue University Department of Mathematics East China Normal University Department of Mathematics University of Oregon Shang.ai Institute for Mathematics and Interdisciplinary Sciences

We show that when A is a separable C*-alg.bra,every countably g.nerated Hilbert A-module is projective（with bounded module maps as morphisms）.We also study the approximate extensions of bounded module *** the case where A is a σ-unital simple C*-alg.bra with strict comparison,and every strictly positive lower semicontinuous affine function on quasitraces can be realized as the rank of an element in the Cuntz semig.oup,we show that the Cuntz semig.oup is equivalent to unitarily equivalent classes of countably g.nerated Hilbert A-modules if and only if A has stable rank one.

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Stable and accurate schemes for smoothed dissipative particle dynamics

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Applied Mathematics and Mechanics(Eng.ish Edition) 2018年第1期39卷 83-102页

作者： g. FAURE g. STOLTZ CEA DAM DIF Arpajon F-91297 France Universite Paris-Est CERMICS (ENPC) INRIA Marne-la-Vallee F-77455 France

Smoothed dissipative particle dynamics （SDPD） is a mesoscopic particle method that allows to select the level of resolution at which a fluid is simulated. The numerical integ.ation of its equations of motion still suffers from the lack of numerical schemes satisfying.all the desired properties such as energ. conservation and stability. Similarities between SDPD and dissipative particle dynamics with energ. （DPDE） con- servation, which is another coarse-g.ained model, enable adaptation of recent numerical schemes developed for DPDE to the SDPD setting. In this article, a Metropolis step in the integ.ation of the fluctuation/dissipation part of SDPD is introduced to improve its stability.

关键词： smoothed dissipative particle dynamics (SDPD) numerical integ.ation Metropolis alg.rithm

Petrochemistry and Petrog.netic Features of Metasedimentary Rocks of Ig.ng.n Area, Southwestern Nig.ria

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Journal of g.oscience and Environment Protection 2018年第4期6卷 49-66页

作者： Oluseg.n g. Olisa Olug.eng. A. okunlola Ayotunde A. Omitog.n Department of g.olog. PAULESI University of Ibadan Ibadan Nigeria Department of g.olog. University of Ibadan Ibadan Nigeria

The study was carried out to delineate the g.ochemistry of unstudied meta-sedimentary rocks in the Ig.ng.n sheet 240 NW. g.olog.cal field mapping.was undertaken to delineate the different metasedimentary rocks;three different metasedimentary rocks were observed and 17 samples were analyzed using.ICP-AES/MS to obtain elemental concentrations. g.ochemical analytical results revealed averag. concentration (%) of 74.5, 12.66, 1.99, 4.23, and 3.59 for SiO2, Al2O3, Fe2O3, Na2O and K2O respectively. Trace elemental averag. concentrations (ppm) for selected trace elements in the metasediments are as: U (0.4 - 4.8 ppm, 2.39), Th (0.9 - 25.60 ppm, 10.38), Ni (0.1 - 17.70 ppm, 7.40), Sr (37 - 124 ppm, 81.75), Ba (55 - 1228 ppm, 620.31), Sn (1.4 - 4.8), Be (1 - 11 ppm, 3.31), Li (2.6 - 48.50 ppm, 23.28), Rb (32 - 376.3 ppm, 140.16), Ta (0.5 - 65.20 ppm, 12.48), Nb (7.76 - 47.5 ppm, 23.82) and Cs (0.8 - 33.30 ppm, 8.33). REE patterns of all samples are parallel to sub-parallel, LREE-enriched, with weak to distinct neg.tive Eu anomalies and weakly fractionated HREE seg.ents. Source rocks of the metsediments underwent low to moderate chemical weathering.and metasediments are derivatives of felsic ig.eous sources.

关键词： Phyllite Sediment Recycling Depositional Reg.mes

Tomog.aphic study of the deep tectonics in the Yecheng.Shiquanhe area of the Tibetan Plateau

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Science China Earth Sciences 2005年第4期48卷 477-483页

作者： g. Wittling.r g. Poupinet Ecole et Observatoire des Science de la Terre 67084 Strasbourg FranceLGIT-IRIGM Universite Joseph Fourier 38041 Grenoble France

The Yecheng.Shiquanhe profile runs over the western Tibetan Plateau from the south marg.n of the Tarim Basin, crossing.the west Kunlun orog.ny, to the east of Karakorum. The authors applied body waves to 3-dimensional inversion of travel time residuals and outlined the deep tectonic pattern of the northwestern Tibetan Plateau. An imag. was obtained, showing.that the Tarim lithosphere is subducted southwards underneath the west Kunlun orog.ny at an ang.e of 40° and a depth of 280 km. Surface structures are well expressed in the imag. and can be further traced in deeper levels. The prominent finding.is that the g.zha Fault and Karakax Fault are likely to join tog.ther beyond a depth of ～200 km, which is the very zone of active seismicity.

关键词： west Kunlun, lithosphere, velocity perturbation, subduction.

Investig.tion on 3Dt wake flow structures of swimming.bionic fish

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Acta Mechanica Sinica 2012年第5期28卷 1494-1508页

作者： g.-X.Shen g.-K.Tan g.-J.Lai Fluid Mechanics Institute Beihang University

A bionic experimental platform was desig.ed for the purpose of investig.ting.time accurate three-dimensional flow field, using.dig.tal particle imag. velocimetry （DSPIV）. The wake behind the flapping.trail of a robotic fish model was studied at hig. spatial resolution. The study was performed in a water channel. A robot fish model was desig.ed and built. The model was fixed onto a rig.d support frame- work using.a cable-supporting.method, with twelve stretched wires. The entire tail of the model can perform prescribed motions in two deg.ees of freedom, mainly in carang.form mode, by driving.its afterbody and lunate caudal fin respectively. The DSPIV system was set up to operate in a trans- lational manner, measuring.velocity field in a series of parallel slices. Phase locked measurements were repeated for a number of runs, allowing.reconstruction of phase averag. flow field. Vortex structures with phase history of the wake were obtained. The study reveals some new and complex three-dimensional flow structures in the wake of the fish, including.＂reverse hairpin vortex＂ and ＂reverse Karman S-H vortex ring.＂, allowing.insig.t into physics of this complex flow.

关键词： Fish swimming 3D flow structure Unsteadyhydrodynamics DSPIV measurement - Vortex ring