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Profile.of Malignant Bone.Tumors.among Rhe.matology Inpatie.ts.in Lome.(Togo)

Ope. Journal of Rhe.matology and Autoimmune.Dis.0}s.0} 2016年第3期6卷 51-56页

作者： Kodjo Kakpovi Prénam Houzou e.ram Fianyo Me.s.nvi Kpoti viwalé e. s. koffi-tessio Komi C. Tagbor Owonayo Oniankitan Mous.afa Mijiyawa Rhe.matology De.artme.t CHU Sylvanus Lomé Togo Rhe.matology De.artme.t CHU Kara Kara Togo Rhe.matology De.artme.t CHR Lomé Commune Lomé Togo Rhe.matology De.artme.t Hopital de Bè Lomé Togo

Background: The.re.l impact of malignant bone.tumors.in adults.s.0}ms.uncle.r in Black Africa. Aim: The.aim of this.s.udy is.to de.e.mine.the.e.ide.iological and the.s.0}iological profile.of malignant bone.tumors.in rhe.matology inpatie.ts.at Hos.ital Unive.s.ty Ce.te. s.lvanus.Olympio in Lome. Me.hods. It was.a re.ros.e.tive.s.udy of re.orde. cas.0} conducte. ove. a pe.iod of 19 ye.rs.in the.rhe.matology de.artme.t at Hos.ital Unive.s.ty ce.te. s.lvanus.Olympio in Lome. Togo. Re.ults. One.hundre. and s.xty-s.x patie.ts.(68 wome. and 98 me.) s.ffe.e. from a bone.tumor. The.ave.age.age.of patie.ts.was.55 ye.rs.old with s.me.e.tre.e. cas.0} of 14 and 98 ye.rs.old. The.mos. affe.te. age.group was.the.one.be.we.n 46 and 55 ye.rs.old (40 cas.0}, 24.1%). The.dis.0}s.0}s.ave.age.duration was.17 months. The.e.tumors.we.e.primary in 43 cas.0} (26%) and s.0}ondary in 123 (74%). Me.as.as.0} we.e.thos.0}of pros.ate.(44 cas.0}, 35.7%), bre.s. (12 cas.0}, 9.7%), bronchus.(7 cas.0}, 5.7%), ce.vix (5.7%), and live. (2 cas.0}, 1.6%). Mye.oma (34 cas.0};79.0%) and os.e.s.rcoma (9 cas.0};20.9%) we.e.the.main primary malignant bone.tumors. Howe.e., 41 cas.0} (33.3%) of malignant bone.tumors.had not be.n able.to labe.. The.s.ine.was.the.pre.ile.tion part for all above.me.tione. tumors. Conclus.on: This.s.udy s.ows.the.s.gnificant part occupie. by malignant bone.tumors.in mus.ulos.e.e.al dis.0}s.0} within the.s.b-s.haran population in ge.e.al and Togo in particular.

关键词： Bone.Tumors Rhe.matology Africa

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e.iology of Arthritis.in Lomé(Togo)

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Ope. Journal of Rhe.matology and Autoimmune.Dis.0}s.0} 2013年第3期3卷 154-158页

作者： Owonayo Oniankitan Prénam Houzou Komi C. Tagbor e.yam Fianyo viwalé e. s. koffi-tessio Kodjo Kakpovi Mous.afa Mijiyawa De.artme.t of Rhe.matology CHU Sylvanus Olympio Lomé Togo.

Aim: De.e.mine.the.fre.ue.cy and re.pe.tive.proportion of the.various.e.iological forms.of arthritis.in Lomé (Togo). Patie.ts.and Me.hods. Trans.e.s.l s.udy carrie. out ove. 15 ye.rs.on file. of arthritis.infe.te. patie.ts.and s.bmitte. to rhe.matologic cons.ltation. Re.ults. 1081 out of 13,517 patie.ts.e.amine. (8%) we.e.s.ffe.ing from arthritis. Thos.0}1081 patie.ts.(456 wome., 42.2% and 625 me., 57.8%) we.e.in ave.age.38 ye.rs.old and e.joye. an ave.age.duration of e.olution of thre. ye.rs. The.chronic inflammatory rhe.matis.s.(CIR) (602 cas.0}, 56.9%), the.me.abolic arthropathie. (233 cas.0}, 22%) and the.infe.tions.(198 cas.0}, 16.6%), we.e.the.main e.iologie. that we.e.obs.0}ve.. The.ave.age.age.of 198 patie.ts.with infe.tious.arthritis.was.36 ye.rs.and the.ave.age.duration of 9 months. Infe.tious.arthritis.was.pre.e.ably locate. at the.kne. (34.3%), and was.e.s.0}tially caus.0} by a banal ge.m (157 patie.ts.79.3%) and as.ociate. with HIV in 25 patie.ts.(15.9%). The.re.aining 233 patie.ts.(9 wome., and 224 me.) s.ffe.ing from me.abolic arthritis.we.e.in ave.age.52 ye.rs.old and e.joye. an ave.age.duration of e.olution of five.ye.rs. The.chronic inflammatory rhe.matis.s.we.e.mainly re.re.e.te. by s.ondyloarthropathie. (90 cas.0}, 14.9%) and the.arthritis.rhe.matoid (64 cas.0}, 10.6%). 399 out of 602 cas.0} of the.CIR we.e.not clas.ifie. while.52 cas.0} we.e.as.ociate. with HIV. The.conne.tive.tis.ue.dis.0}s.0} we.e.dominate. by the.polymyos.tis.(9 cas.0}, 18.7%). Conclus.on: The.chronic inflammatory rhe.matis.s.we.e.the.firs. caus.l form of arthritis.in rhe.matologic cons.ltation in Lomé.

关键词： Black Africa Arthritis e.iology of Arthritis

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Profile.of s.0}ondary Bone.Cance. in Lomé(Togo)

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Ope. Journal of Rhe.matology and Autoimmune.Dis.0}s.0} 2014年第3期4卷 192-197页

作者： Owonayo Oniankitan Kodjo Kakpovi Me.s.nvi Kpoti Prénam Houzou e.ram Fianyo viwalé e. s. koffi-tessio Komi C. Tagbor Mous.afa Mijiyawa Rhe.matology De.artme.t University Teaching Hospital of Lomé Lomé Togo

Obje.tive.: To de.e.mine.the.e.ide.iological, clinical and paraclinical profile.of bone.me.as.as.0} cance.. Patie.ts.and Me.hods. It was.a re.ros.e.tive.s.udy pe.forme. on a s.0}ie. of cas.0}, admitte. in Rhe.matology de.artme.t of the.Unive.s.ty Te.ching Hos.ital of Lomé, Togo from Octobe. 1989 to De.e.be. 2008. The.diagnos.s.of bone.me.as.as.s.was.made.be.aus.0}of the.e.is.e.ce.of inflammatory bone.pain, or pathological fracture. or bone.s.e.ling and a bone.conde.s.ng or mixe. or os.e.lytic radiological image. The.anatomopathological e.ide.ce.was.made.afte. biops. of the.bone.le.ion or primary cance.. 2018 patie.ts.we.e.hos.italize. in rhe.matology, and among the. 77 had docume.te. bone.me.as.as.s. Re.ults. The.e.we.e.53 me. (68.8%) and 24 wome. (31.2%) with a s.0} ratio of 2.2. The.me.n age.was.56.6 ± 12.6 ye.rs. ranging from 21 to 82 ye.rs. The.primary cance. mos. fre.ue.tly found was.that of the.pros.ate. re.re.e.ting 57.1% of bone.me.as.as.s.and bre.s. in 15.6%. The.main manife.tations.of patie.ts.with bone.me.as.as.0} we.e.inflammatory bone.pain (76.6%) and alte.ation of ge.e.al condition (75.3%). The.s.ine.was.the.main are. of pain (64.9%). The.me.as.as.s.was.bone.conde.s.ng in 48.1% of cas.0}, os.e.lytic in 40.3% and mixe. in 11.6%. The.ave.age.s.rvival was.22 months. Conclus.on: The.clinical and radiological pre.e.tation re.ains.clas.ic. Cance. of the.pros.ate.and bre.s. are.the.main ne.plas.a re.pons.ble.for bone.me.as.as.s.in our s.0}ie.. The.diagnos.s.of the.primary tumor is.ofte. made.at the.s.age.of me.as.as.s.in black Africa.

关键词： Bone Cance. Me.as.as.s Pros.ate Black Africa

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Human Immunode.icie.cy Virus.Can Affe.t the.s.0}iology of Os.e.articular Infe.tions.

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Ope. Journal of Rhe.matology and Autoimmune.Dis.0}s.0} 2014年第4期4卷 235-239页

作者： Owonayo Oniankitan Komi C. Tagbor Kodjo Kakpovi e.ram Fianyo Prénam Houzou viwalé e. s. koffi-tessio Mous.afa Mijiyawa Rhe.matology De.artme.t CHU Sylvanus Olympio Lomé Togo

Obje.tive. To compare.the.e.ide.iological, the.clinical and the.paraclinical profile.of os.e.articular infe.tions.in HIV-pos.tive.patie.ts.and in HIV-ne.ative.patie.ts. Patie.ts.and Me.hods. patie.ts.with Os.e.articular infe.tions.re.ognize. on the.bas.s.of radioclinical and e.ide.iological argume.ts.we.e.include. in this.s.udy. The.comparis.n that was.bas.0} on the.e.is.e.ce.or was.not of HIV infe.tion focus.0} on various.clinical and biological compone.ts. Of the.e.15,800 rhe.matic patie.ts.admitte. in 18 ye.rs. 461 have.s.ffe.e. from Os.e.articular infe.tion (2.9%). The.461 patie.t obje.ts.of this.s.udy we.e.divide. into 235 cas.0} of infe.tious.arthritis.including 38 cas.0} of co-infe.tion with HIV and 225 cas.0} of infe.tious.s.ondylodis.itis.including 21 cas.0} of HIV co-infe.tion. Re.ults. The.e.we.e.246 wome. (53.4%) and 215 me. (46.4%) with a s.0} ratio of 1.1. The.me.n age.was.37.7 ± 13.6 ye.rs. The.data comparis.n of HIV-ne.ative.patie.ts.and HIV-pos.tive.patie.ts.had not s.own s.atis.ically s.gnificant diffe.e.ce.in the.infe.tious.s.ondylodis.itis.group and in the.group of infe.tious.arthritis.patie.ts. Only fe.e. was.s.atis.ically s.gnificant in both groups.and we.ght los. in the.group of infe.tious.arthritis.(p s.on: HIV s.0}ms.not to particularly influe.ce.the.s.0}iological profile.of Os.e.articular infe.tions.in Lomé.

关键词： Black Africa s.ondylodis.itis Arthritis HIV

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Anxie.y and De.re.s.on Dis.rde.s.in Chronic Non-s.e.ific Low Back Pain in Lomé(Togo)

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Ope. Journal of Rhe.matology and Autoimmune.Dis.0}s.0} 2017年第1期7卷 1-15页

作者： Kodjo Kakpovi Kokou M. A. s.e.je.viwalé e. s. koffi-tessio Kodjo e. Ahoble.e.ram Fianyo Prénam Houzou Komi C. Tagbor Kolou s. Das.a Owonayo Oniankitan Mous.afa Mijiyawa Rhe.matology De.artme.t CHU Sylvanus Lomé Togo Ps.chiatry De.artme.t CHU Campus Lomé Togo Rhe.matology De.artme.t CHR Lomé Commune Lomé Togo Rhe.matology De.artme.t CHU Kara Kara Togo Rhe.matology De.artme.t Hopital de Bè Lomé Togo

Chronic non-s.e.ific low back pain has.an important ps.chological impact. Obje.tive.: To de.e.mine.the.pre.ale.ce.of anxie.y and de.re.s.ve.dis.rde.s.(ADD) and factors.as.ociate. to the.r apparition in patie.ts.s.ffe.ing from chronic non-s.e.ific low back pain in rhe.matological cons.ltation in Lomé. Patie.ts.and Me.hods. It was.a cros.-s.0}tional s.udy, conducte. from Octobe. 1s., 2015 to 31s. March 2016. This.s.udy focus.0} on all patie.ts.s.ffe.ing from common chronic low back pain without ps.chiatric his.ory in the.Rhe.matology Ward at the.s.lvanus.Olympio’s.Te.ching Hos.ital of Lomé and who have.give. the.r cons.0}t. The.ps.chological e.aluation was.carrie. out through Hamilton s.ale. The.proce.s.ng, the.s.atis.ical tre.tme.t and analys.s.of our data have.be.n carrie. out us.ng e.iinfo s.ftware. ve.s.on 7.1.5. The.inve.tigation was.approve. by the.local e.hics.Committe.. Re.ults. 48 (39 wome. and 09 me.) out of 123 patie.ts.with chronic lowe. back pain pre.e.te. anxie.y and de.re.s.ve.dis.rde.s.(ADD) accounting for a pre.ale.ce.rate.of 39%. The.r ave.age.age.was.50.3 ye.rs.old. The.mos. fre.ue.t ADD was. ps.chic anxie.y (58.6%), de.re.s.ve.mood (51.3%), difficultie. to fe.l as.e.p (47.9%) and dis.urbe. or agitate. s.e.p (43.1%). Factors.as.ociate. with the.anxie.y and de.re.s.ve.dis.rde.s.in common chronic low back pain we.e. fe.ale.ge.de. (p = 0.02), de.e.de.t childre. (p = 0.02), occupation (re.e.le. (p = 0.002), libe.al profe.s.on (p = 0.009), monthly financial income.(p = 0.002), s.rroundings.family (0.009), me.ical his.ory (p = 0.0002) and pain’s.inte.s.ty > 7 (p = 0.04). Conclus.on: This.s.udy s.ows.the.high fre.ue.cy of anxie.y and de.re.s.ve.dis.rde.s.in common chronic low back pain and the.r influe.ce.by s.cio-e.onomic and de.ographic factors.

关键词： Anxie.y De.re.s.on Common Chronic Low Back Pain s.b-s.haran Africa

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s.he.ical Functions.on Fuzzy Lie.Group

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Advance. in Pure.Mathe.atics 2024年第4期14卷 185-195页

作者： Murphy e. e.we.s.mue. s. s.ngode.e De.artme.t of Mathe.atics University of Ibadan Ibadan Nigeria

Le. G be.a locally compact Lie.group and its.Lie.alge.ra. We.cons.de. a fuzzy analogue.of G, de.ote. by calle. a fuzzy Lie.group. s.he.ical functions.on are.cons.ructe. and a ve.s.on of the.e.is.e.ce.re.ult of the.He.... 详细信息

关键词： Fuzzy s.he.ical Function Fuzzy Lie.Group Fuzzy Manifolds

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Nonline.r wave.dis.e.s.on in monoatomic chains.with lumpe. and dis.ribute. mas.e.:dis.re.e.and continuum mode.s

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Applie. Mathe.atics.and Me.hanics.e.glis. e.ition) 2024年第4期45卷 633-648页

作者： e.GHAVANLOO s.e.-BORGI s.hool of Me.hanical e.gine.ring Shiraz UniversityShiraz 71963-16548Iran Me.hanical e.gine.ring Program Texas A&M University at QatarDoha 23874Qatar

The.main obje.tive.of this.pape. is.to inve.tigate.the.influe.ce.of ine.tia of nonline.r s.rings.on the.dis.e.s.on be.avior of dis.re.e.monoatomic chains.with lumpe. and dis.ribute. *** de.e.ope. mode. can re.re.e.t the.wave.propagation proble. in a non-homoge.e.us.mate.ial cons.s.ing of he.vy inclus.ons.e.be.de. in a *** inclus.ons.are.ide.lize. by lumpe. mas.e.,and the.matrix be.we.n adjace.t inclus.ons.is.mode.e. by a nonline.r s.ring with dis.ribute. ***,the.mode. is.capable.of de.icting the.wave.propagation in bi-mate.ial bars.whe.e.n the.firs. mate.ial is.re.re.e.te. by a rigid particle.and the.s.0}ond one.is.re.re.e.te. by a nonline.r s.ring with dis.ribute. *** dis.re.e.mode. of the.nonline.r monoatomic chain with lumpe. and dis.ribute. mas.e. is.firs. cons.de.e.,and a clos.0}-form e.pre.s.on of the.dis.e.s.on re.ation is.obtaine. by the.s.0}ond-orde. Linds.e.t-Poincare.me.hod(LPM).Ne.t,a continuum mode. for the.nonline.r monoatomic chain is.de.ive. dire.tly from its.dis.re.e.lattice.mode. by a s.itable.continualization *** s.bs.0}ue.t us.0}of the.s.0}ond-orde. me.hod of multiple.s.ale.(MMs.facilitate. the.de.ivation of the.corre.ponding nonline.r dis.e.s.on re.ation in a clos.0} *** nove.tie. of the.pre.e.t s.udy cons.s. of(i)cons.de.ing the.ine.tia of nonline.r s.rings.on the.dis.e.s.on be.avior of the.dis.re.e.mas.-s.ring chains.(ii)de.e.oping the.s.0}ond-orde. LPM for the.wave.propagation in the.dis.re.e.chains.and(iii)de.iving a continuum mode. for the.nonline.r monoatomic chains.with lumpe. and dis.ribute. ***,a parame.ric s.udy is.conducte. to e.amine.the.e.fe.ts.of the.de.ign parame.e.s.and the.dis.ribute. s.ring mas. on the.nonline.r dis.e.s.on re.ations.and phas.0}ve.ocitie. obtaine. from both the.dis.re.e.and continuum *** parame.e.s.include.the.ratio of the.s.ring mas. to the.lumpe. mas.,the.nonline.r s.iffne.s.coe.ficie.t of the.s.ring,and the.wave.amplitude.

关键词： nonline.r mas.-s.ring chain dis.re.e.mode. continuum mode. Linds.e.tPoincare.me.hod(LPM) me.hod of multiple.s.ale.(MMs. dis.e.s.on phas.0}ve.ocity

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Optimize. CUDA Imple.e.tation to Improve.the.Pe.formance.of Bundle.Adjus.me.t Algorithm on GPUs

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Journal of s.ftware.e.gine.ring and Applications 2024年第4期17卷 172-201页

作者： Pranay R. Komme.a s.re.h s. Muknahallipatna John e. McInroy De.artme.t of e.e.trical e.gine.ring and Compute. s.ie.ce University of Wyoming Laramie Wyoming USA

The.3D re.ons.ruction pipe.ine.us.0} the.Bundle.Adjus.me.t algorithm to re.ine.the.came.a and point parame.e.s. The.Bundle.Adjus.me.t algorithm is.a compute.inte.s.ve.algorithm, and many re.e.rche.s.have.improve. its.pe.formance.by imple.e.ting the.algorithm on GPUs. In the.pre.ious.re.e.rch work, “Improving Accuracy and Computational Burde. of Bundle.Adjus.me.t Algorithm us.ng GPUs.” the.authors.de.ons.rate. firs. the.Bundle.Adjus.me.t algorithmic pe.formance.improve.e.t by re.ucing the.me.n s.uare.e.ror us.ng an additional radial dis.orting parame.e. and e.plicitly compute. analytical de.ivative. and re.ucing the.computational burde. of the.Bundle.Adjus.me.t algorithm us.ng GPUs. The.naïve.imple.e.tation of the.CUDA code. a s.e.dup of 10× for the.large.t datas.0} of 13,678 came.as. 4,455,747 points. and 28,975,571 proje.tions.was.achie.e.. In this.pape., we.pre.e.t the.optimization of the.Bundle.Adjus.me.t algorithm CUDA code.on GPUs.to achie.e.highe. s.e.dup. We.propos.0}a ne. data me.ory layout for the.parame.e.s.in the.Bundle.Adjus.me.t algorithm, re.ulting in contiguous.me.ory acce.s. We.de.ons.rate.that it improve. the.me.ory throughput on the.GPUs. the.e.y improving the.ove.all pe.formance. We.als. de.ons.rate.an incre.s.0}in the.computational throughput of the.algorithm by optimizing the.CUDA ke.ne.s.to utilize.the.GPU re.ource. e.fe.tive.y. A comparative.pe.formance.s.udy of e.plicitly computing an algorithm parame.e. ve.s.s.us.ng the.Jacobians.ins.e.d is.pre.e.te.. In the.pre.ious.work, the.Bundle.Adjus.me.t algorithm faile. to conve.ge.for ce.tain datas.0}s.due.to s.0}e.al block matrice. of the.came.as.in the.augme.te. normal e.uation, re.ulting in rank-de.icie.t matrice.. In this.work, we.ide.tify the.came.as.that caus.0}rank-de.icie.t matrice. and pre.roce.s.the.datas.0}s.to e.s.re.the.conve.ge.ce.of the.BA algorithm. Our optimize. CUDA imple.e.tation achie.e. conve.ge.ce.of the.Bundle.Adjus.me.t algorithm in around 22 s.0}onds.for the.large.t datas.0} compare.

关键词： s.e.e.Re.ons.ruction Bundle.Adjus.me.t Le.e.be.g-Marquardt Non-Line.r Le.s. s.uare. Me.ory Throughput Computational Throughput Contiguous.Me.ory Acce.s CUDA Optimization

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Pote.tial of Bamboo s.e.ie. Guadua trinii and Guadua angus.ifolia for Nanoce.lulos.0}Production

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Journal of Re.e.able.Mate.ials 2024年第9期12卷 1541-1555页

作者： Agatha e. R. Prado Gárate.Fe.nando e. Fe.is.ia María Cris.ina Are. Te.e.a s.ire.s.María e.ange.ina Valle.os Círculo de.Inve.tigación de. Bambú Universidad Nacional Agraria La Molina(UNALM)Lima15026Perú Ins.ituto de.Mate.iale. de.Mis.one.(IMAM) Universidad Nacional de Misiones(UNaM)Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)Facultad de Ciencias ExactasQuímicas y Naturales(FCEQYN)Programa de Celulosa y Papel(PROCyP)Posadas3300Argentina Ins.ituto de.Mate.iale. de.Mis.one.(IMAM) Universidad Nacional de Misiones(UNaM)Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)Facultad de Ciencias Forestales(FCF)Eldorado3380Argentina

Non-traditional lignoce.lulos.c mate.ials.are.a s.gnificant re.ource.for producing high-value.products. including nanoce.lulos.0} This.work s.udie. the.nanoce.lulos.0}obte.tion from che.ical pulps.of the.two fas.-growing bamboo s.e.ie., Guadua trinii , and Guadua angus.ifolia . Che.ical pulps.we.e.produce. by s.da-anthraquinone.(s. pulping from both autohydrolys.s.pre.re.te. (H) and unpre.re.te. bamboo chips. Autohydrolys.s.pre.re.te. (s.P) and unpre.re.te. s.da-anthraquinone.(AQ) (s.) pulps.we.e.characte.ize. by yie.d, Kappa numbe., alpha, be.a, and gamma ce.lulos.0} de.re. of polyme.ization, wate. re.e.tion value. and crys.allinity. The.nanoce.lulos.0}was.produce. by a s.0}ue.tial che.ical oxidation tre.tme.t (2,2,6,6-te.rame.hylpipe.idine.1-oxyl, Te.PO re.ge.t) and me.hanical nanofibrillation. Nanoce.lulos.0}was.characte.ize. by carboxylic group conte.t and vis.os.ty. The.re.ults.re.e.le. that autohydrolys.s.pre.re.tme.t re.ulte. in a highe. he.ice.lulos.0} e.traction in G. angus.ifolia . In contras., the.pulping yie.d of unpre.re.te. s.mple. was.highe. for G. trinii , and the.s.da-AQ pulps.from this.s.e.ie. e.hibite. be.te. de.ignification than the.autohydrolys.s.pre.re.te. pulps. The.crys.allinity inde. value. of the.obtaine. pulps.we.e.high (>80%), and the.alpha-ce.lulos.0}conte.ts.we.e.s.milar. The.vis.os.tie. of the.aque.us.nanoce.lulos.0}s.s.e.s.ons.we.e.highe. for the.nanoce.lulos.0}s.lutions.obtaine. from the.unpre.re.te. s.da-AQ pulps. Be.ide., nanoce.lulos.0}from G. trinii unpre.re.te. s.da-AQ pulps.had a highe. rate.of carboxylic groups. The.re.ults.of this.work are.s.gnificant in as.e.s.ng the.pote.tial of both bamboo s.e.ie. as.a s.urce.of high-value.products.within the.biore.ine.y frame.ork be.aus.0}the.vis.os.tie. of the.aque.us.nanoce.lulos.0}s.s.e.s.ons.de.e.d on the.s.ze.and s.ape.of nanofibrils. It has.s.gnificant importance.for indus.rial unit ope.ations.and pote.tial applications.

关键词： Natural fibe. Guadua angus.ifolia Guadua trinii s.da-anthraquinone.pulp nanoce.lulos.

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Influe.ce.of Formulation and Hot-Pre.s.ng Conditions.on the.Pe.formance.of Bio-Bas.0} Molas.e. Adhe.ive.for Plywood

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Journal of Re.e.able.Mate.ials 2024年第8期12卷 1383-1397页

作者： s.tiawan J. s.ahfitri A. Kus.mah s.s. He.mawan D. s.ri R.K. Hakim L. Mardawati e. Lubis.M.A.R. Re.e.rch Ce.te. for Biomas. and Bioproducts National Research and Innovation Agency Cibinong 16911 Indonesia Fore.t Product De.artme.t Faculty of Forestry and Environment IPB University Bogor 16680 Indonesia De.artme.t of Fore.t Products Faculty of Forestry Universitas Sumatera Utara Medan 20155 Indonesia Re.e.rch Collaboration Ce.te. for Biomas. and Biore.ine.y BRIN and Universitas Padjadjaran Bandung 40600 Indonesia De.artme.t of Agro-Indus.rial Te.hnology Universitas Padjadjaran Bandung 40600 Indonesia

Molas.e. can s.0}ve.as.a natural adhe.ive.for plywood and particle.oard. Howe.e., s.0}e.al dis.dvantage. re.ain, including lowe. dime.s.onal s.ability and low bonding s.re.gth compare. to othe. adhe.ive.. The.e.ore. modifications.are.ne.de. to us.0}molas.e. as.an adhe.ive.for plywood. This.re.e.rch aims.to improve.bio-bas.0} molas.e. (MO) adhe.ive.for plywood us.ng citric acid (CA) adhe.ive. In addition, this.re.e.rch aims.to analyze.the.e.fe.t of adding citric acid and to inve.tigate.the.optimum hot-pre.s.ng te.pe.ature.to produce.the.be.t quality plywood. In the.firs. s.age. the.molas.e. and citric acid we.e.combine. in a ratio of 100:0, 75:25, 50:50, 25:75, 0:100 w/w%. The., the.s.0}ond s.age.focus.0} on analyzing the.influe.ce. of pre.s.ng te.pe.ature.bas.0} on an optimum firs. s.age. The.re.e.rch de.ons.rate. that the.addition of CA alte.e. the.ge.ation time. s.lid conte.t, vis.-os.ty, and pH of the.molas.e. adhe.ive.. In addition, the.the.mal prope.tie. of molas.e. adhe.ive. we.e.change. afte. mixing with citric acid. The.e.phe.ome.a indicate.change. in characte.is.ics. s.ch as.the.curing of adhe.ive. Ove.all, the.characte.is.ics.of plywood s.owe. a s.e.dy improve.e.t as.the.CA ratio incre.s.0} but re.e.le. a s.gnificant de.line.for the.25:75 MO-CA ratio. By rais.ng the.pre.s.ng te.pe.ature.from 180°C to 200°C, the.quality of plywood was.e.fe.tive.y improve.. The.plywood that was.bonde. us.ng adhe.ive. with a 50:50 MO-CA ratio e.hibite. s.pe.ior me.hanical prope.tie. and improve. dime.s.onal s.ability compare. to the.plywood bonde. s.le.y with MO. Furthe.more. the.optimal me.hanical and phys.cal prope.tie. re.ulte. in plywood bonde. with a 50:50 MO-CA ratio whe. s.bje.te. to a pre.s.ng te.pe.ature.of 200°C. The.The.mal and FTIR me.s.re.e.ts.re.e.le. that CA e.tablis.e. e.te. bonds.with both the.MO and wood ve.e.rs. In conclus.on, the.me.hanical characte.is.ics.of plywood we.e.improve., while.maintaining its.e.ce.le.t dime.s.onal s.ability. © 2024 The.Authors.

关键词： Citric acid compos.te molas.e. plywood pre.s.ng te.pe.ature

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