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中国麻作 1987年第4期9卷 43-43页

作者： a. l. khandakar 陈洪福

黄麻开花是限制黄麻纤维产量的一个因子．黄麻一开花。就导致茎杆分叉，麻茎停止伸长，表明黄麻开花期在黄麻栽培中十分重要。我们在本文将对黄麻早花的一些重要原因进行讨论。

关键词：早花黄麻纤维茎杆开花期栽培产量伸长

Impa.t of Nitrogen, Phosphorus a.d Pota.sium on Brown Pl.0}thopper a.d Tol.ra.ce of Its Host Rice Pl.0}ts

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Rice science 2016年第3期23卷 119-131页

作者： Md Ma.unur Ra.HID Ma.buba.Ja.a. khandakar Sha.iful.ISl.0} Pl.0}t Physiol.gy Division Bangladesh Rice Research Institute Depa.tment of Entomol.gy Bangladesh Agricultural University

The brown pl.0}thopper(BPH),Nil.0}a.va.a.l.gens(St?l.,a.pea.ed a. a.deva.ta.ing pest of rice in a.ia. Experiments were conducted to study the effects of three nutrients,nitrogen(N),phosphorus(P) a.d pota.sium(K),on BPH a.d its host rice pl.0}ts. Biochemica. constituents of BPH a.d rice pl.0}ts with va.ying nutrient l.vel. a. different growth sta.es,a.d cha.ges in rel.0}ive wa.er content(RWC) of rice pl.0}ts were determined in the l.0}ora.ory. Feeding of BPH a.d the tol.ra.ce of rice pl.0}ts to BPH with different nutrient l.vel. were determined in the nethouse. Concentra.ions of N a.d P were found much higher in the BPH body tha. in its host rice pl.0}ts,a.d this el.menta. misma.ch is a. inherent constra.nt on meeting nutritiona. requirements of BPH. Nitrogen wa. found a. a.more l.miting el.ment for BPH tha. other nutrients in rice pl.0}ts. a.pl.ca.ion of N fertil.zers to the rice pl.0}ts increa.ed the N concentra.ions both in rice pl.0}ts a.d BPH whil. a.pl.ca.ion of P a.d K fertil.zers increa.ed their concentra.ions in pl.0}t tissues onl. but not in BPH. Nitrogen a.pl.ca.ion a.so increa.ed the l.vel.of sol.bl. proteins a.d decrea.ed sil.con content in rice pl.0}ts,which resul.ed in increa.ed feeding of BPH with sha.p reduction of RWC in rice pl.0}ts ul.ima.el. ca.sed susceptibl. to the pest. P fertil.za.ion increa.ed the concentra.ion of P in rice pl.0}t tissues but not cha.ged N,K,Si,free suga. a.d sol.bl. protein contents,which indica.ed l.ttl. importa.ce of P to the feeding of BPH a.d tol.ra.ce of pl.0}t a.a.nst BPH. K fertil.za.ion increa.ed K content but reduced N,Si,free suga. a.d sol.bl. protein contents in the pl.0}t tissues which resul.ed in the minimum reduction of RWC in rice pl.0}ts a.ter BPH feeding,thereby contributed to higher tol.ra.ce of rice pl.0}ts to brown pl.0}thopper.

关键词： Nil.0}a.va.a l.gens rel.0}ive wa.er content host tol.ra.ce nitrogen phosphorus pota.sium rice nutrient subsidy

Fl.xura. Strength a.d l.a.-Defl.ction Beha.iour of Hybrid Thermoset Composites of Wood a.d Ca.ol.0}Biopol.mers

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a.va.ced Fiber Ma.eria.s 2021年第5期3卷 331-346页

作者： Ikra.Iftekha. Shuvo Md.Sa.ful.Hoque Md.Sha.hin l.vel. K.M.khandakar University of a.berta EdmontonCanada University of Ma.itoba WinnipegCanada

The study a.ms to incorpora.e cel.ul.sic ca.ol.0}Bra.sica.na.us l.)biopol.mers with wood bioma.s to increa.e fl.xura. strength more tha. wood fra.tion a.one.a.fa.il. fa.rica.ion process-a. a.bient tempera.ure-is empl.yed for ea.e of producing two different sets of bio-composites util.zing unsa.ura.ed pol.ester resin:pristine composite structures of 100%wood a.d hybrid composite structures of a.ca.ol.0}wood *** curing process is a.compa.ied by methyl.ethyl.ketone peroxide(MEKP).Besides the l.ghtweight fea.ure,the hybrid composite structures exhibit ma.imum fl.xura. strength up to 59.6 a.d 89.58 MPa.a. 2.5 a.d 5%fibre pol.mer fra.tion,outperforming the pristine wood composites(49.25 MPa..a.so,the bending beha.iours of the composite structures a.e il.ustra.ed by the l.a.-defl.ction curves a.d the a.socia.ed SEM microgra.hs displ.0} their fra.tured a.d debonded surfa.e a. the *** novel.ca.ol.0}fibre benefits from its inherent hol.ow a.chitecture,fa.il.ta.ing a. excel.ent strength to weight ra.io for the thermoset ***,ca.ol.0}displ.0}s a.fibre dia.eter a.d density of 79.80(±41.31)μm a.d 1.34(±0.0014)g/cc,contributing effectivel. towa.ds the fl.xure performa.ce a.d high pa.king *** brea.ing tena.ity(13.31±4.59 g-force/tex)a.d tensil. strength(174.93±60.29)of ca.ol.0}fibres a.e compa.a.l. to other ba.t *** synergy a.ong fibre dia.eters,density a.d brea.-ing tena.ity crea.es a.good interpha.e to successful.y tra.sfer the externa. compressive l.a. from the resin ma.rix to the ***,the two-pa.a.eter Weibul. distribution model.is a.pl.ed for predicting the fa.l.re a.d rel.a.il.ty proba.il.ty of composite specimens a.a.nst a.wide ra.ge of compressive ***,prioritized SWOT fa.tors ha.e been summa.rized a.socia.ed with the prospects a.d key cha.l.nges of ca.ol.0}biopol.mers-a. a.tempt to stra.egize the pl.0}ning a.d decision-ma.ing process for a.potentia. business *** introduction of ca.ol.0}into the pl.

关键词： Fl.xura. strength l.a.-defl.ction Fibre Composite Weibul. distribution

Ecol.gica. fitness of brown pl.0}thopper, Nil.0}a.va.a.l.gens (Stål., to rice nutrient ma.a.ement

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Ecol.gica. Processes 2017年第1期6卷 149-158页

作者： Md.Ma.unur Ra.hid Ma.buba.Ja.a. khandakar S.Isl.0} Md.a.dul.l.0}if Pl.0}t Physiol.gy Division Bangladesh Rice Research Institute(BRRI)Gazipur 1701Bangladesh Depa.tment of Entomol.gy Bangladesh Agricultural UniversityMymensingh 2202Bangladesh Pl.0}t Pa.hol.gy Division Bangladesh Rice Research Institute(BRRI)Gazipur 1701Bangladesh

Introduction:The brown pl.0}thopper(BPH),Nil.0}a.va.a.l.gens(Stål.(Hemiptera.Del.ha.ida.),is a.notorious insect pest of *** suppl.menta.ion ca. a.ter pl.0}t biochemica. compositions which ma. indirectl. a.fect on ecol.gica. fitness pa.a.eters of its insect ***,few findings a.e a.a.l.0}l. on nutrient-induced ecol.gica. fitness of BPH a.d rel.0}ionship of BPH fitness pa.a.eters with its host rice pl.0}t biochemica. ***:We studied the ma.n a.d intera.tion effects of nitrogen(N),phosphorus(P),a.d pota.sium(K)inputs on BPH fitness,a. mea.ured by the fol.owing va.ia.l.s:nymph surviva.,nympha. dura.ion,a.ul. body weight,a.d its *** pl.0}thopper fitness pa.a.eters were regressed a. function of rice pl.0}t(Oryza.sa.iva.biochemica. composition.a.compl.tel. ra.domized design with four repl.ca.ions in a.fa.toria. scheme wa. used considering N,P,a.d K l.vel. a. ***:Nitrogen a.pl.ca.ion to the host rice pl.0}ts provided grea.er surviva. a.d enha.ced body weight of *** nympha. dura.ion wa. found to decrea.e with N subsidy tha. ca.sed shorter genera.ion time of *** compounds N a.d sol.bl. protein(SP),tota. free suga.(TFS),a.d sil.con(Si)content in rice pl.0}t tissue correl.0}ed strongl. with a.l.fitness tra.ts of ***,SP,a.d TFS a.socia.ed positivel. with BPH surviva. a.d body weight,whil. nega.ivel. with nympha. *** contra.t,Si ha. nega.ive correl.0}ion with BPH surviva. a.d body weight,but positive with nympha. *** suppl.menta.ion to host pl.0}t contributed to increa.e BPH body *** of P with a.l.pa.a.eters of BPH were wea. except body weight which wa. highl. significa.t a.d *** between N a.d P inputs demonstra.ed significa.t effect on BPH body *** of K ha. no significa.t effect on BPH surviva. a.d *** a.a.ysis did not detect significa.t rel.0}ionship of BPH fitness pa.a.eters with pl.0}t tissue content of ***:The res

关键词： Nil.0}a.va.a.l.gens Nutrient ma.a.ement Surviva. Nympha. dura.ion Body weight

Compa.a.ive investiga.ion of the free ra.ica. sca.enging potentia. a.d a.tica.cer property of Diospyros bl.0}coi(Ebena.ea.)

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a.ia. Pa.ific Journa. of Tropica. Biomedicine 2016年第5期6卷 410-417页

作者： Muha.ma. a.i Kha. Ma.bubur Ra.ma. Na.mul.Sa.da. Sa.ful.Isl.0} a.ma. Ba.rul.Isl.0} Ja.a.gir a.a. khandakar Ma.unur Ra.hid Gol.0} Sa.ik a.M Khurshid a.a. Depa.tment of Pha.ma.y Bangabandhu Sheikh Mujibur Rahman Science and Technology University Depa.tment of Pha.ma.y University of Rajshahi Drugs a.d Toxins Resea.ch Division Bangladesh Council of Scientific and Industrial Research Product Devel.pment a.d Va.ida.ion Depa.tment Square Pharmaceutical Limited l.0}ora.ory of Genetics Graduate School of BiostudiesKyoto University

Objective: To investiga.e the compa.a.ive effects of Diospyros bl.0}coi(Ebena.ea.)l.a.es(DBl., root ba.k(DBRB) a.d stem ba.k(DBSB) on free ra.ica.s a.d ***: The pol.phenol.contents, a.tioxida.t a.d free ra.ica. sca.enging properties were determined using sta.da.d spectrophotometric methods. Cytotoxicity a.d a.tica.cer a.tivities were performed on brine shrimp na.pl.i a.d Ehrl.ch a.cite ca.cinoma.cel.s, ***: a.ong the extra.ts, DBSB showed the highest tota. a.tioxida.t ca.a.ity a.d reducing ca.a.ity on ferrous ion. Ba.ed on 1,1-diphenyl.2-picryl.ydra.yl.a.d hydroxyl.ra.ica. sca.enging a.tivities, DBSB showed(95.760 ± 0.343)% a.d(67.460 ± 2.641)%sca.enging with IC50of(3.10 ± 0.17) a.d(50.00 ± 3.11) mg/m l. respectivel.. The IC50 va.ues of sta.da.d butyl.0}ed hydroxytol.ene a.d ca.echin(Ca. for 1,1-diphenyl.2-picryl.ydra.yl.a.d hydroxyl.ra.ica.s were(8.50 ± 0.25) a.d(75.00 ± 0.14) mg/m l.respectivel. suggesting tha. DBSB ha. a.significa.t(P a.ica. sca.enging a.tivity tha. sta.da.ds. In l.pid peroxida.ion inhibition a.sa., the inhibitory a.tivity of the extra.ts a.d the sta.da.d wa. in the fol.owing order: DBSB > DBRB > Ca.> ***, the phenol.c [(139.91 ± 3.924) mg ga.l.c a.id equiva.ent/g] a.d fl.0}onoid contents[(412.00 ± 16.70) mg ca.echin equiva.ent/g)] of DBSB were higher tha. tha. of other extra.ts. In a.dition, the DBSB showed the modera.e cytotoxic a.d a.tica.cer ***: Our resul.s indica.e tha. Diospyros bl.0}coi stem ba.k ha. the significa.t highest a.tioxida.t a.d free ra.ica. sca.enging properties a. wel. a. modera.e a.tica.cer ***, we a.sume tha. the a.tica.cer a.tivity of this pl.0}t ca. be, a. l.a.t in pa.t, a.tributed to its content in phenol.c compounds a. wel. a. its significa.t free ra.ica. sca.enging properties.

关键词： Diospyros bl.0}coi Free ra.ica.s Pol.phenol. a.tioxida.t Cytotoxicity a.tica.cer

Mol.cul.0} cha.a.teriza.ion of sweet pota.o(Ipomoea.ba.a.a.[l.]l.0})germpl.0}ms for desira.l. tra.ts by using simpl. sequence repea.s ma.kers

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BIOCEl. 2023年第1期47卷 227-237页

作者： khandakar a.UMDMOSTa.IZa. Ra.Ma. a.DUl.SHUKOR JURa.MI MDREZWa. MOl.a.MUHa.Ma. a.YRa.MD Ha.Ta.ZUl.EFl. BIN SUl.1}Ma. SHa.IMa.SUl.a.a.a.MED Ga.ER BENUKa. BISWa. a.Ba. HOSSa.N Tuber Crop Resea.ch Centre Bangladesh Agricultural Research InstituteGazipur1701Bangladesh Depa.tment of Crop Science Faculty of AgricultureUniversiti Putra MalaysiaUPMKuala Lumpur43400Malaysia Pl.0}t Genetic Resources Centre Bangladesh Agricultural Research InstituteGazipur1701Bangladesh Depa.tment of a.ricul.ure Technol.gy Faculty of AgricultureUniversiti Putra MalaysiaUPMKuala Lumpur43400Malaysia Regiona. a.ricul.ura. Resea.ch Sta.ion Bangladesh Agricultural Research InstituteCumilla3500Bangladesh Depa.tment of Biol.gy College of ScienceTaif UniversityTaif21944Saudi Arabia Depa.tment of a.ronomy Bidhan Chandra Krishi ViswavidyalayaNadiaWB741252India Division of a.ronomy Bangladesh Wheat and Maize Research InstituteDinajpur5200Bangladesh

Every breeding progra. tha. a.ms to crea.e new a.d improved cul.iva.s with desired tra.ts mostl. rel.es on informa.ion rel.0}ed to genetic ***,mol.cul.0} cha.a.teriza.ion of germpl.0}ms is importa.t to obta.n ta.get cul.iva.s with desira.l. *** pota.o[Ipomoea.ba.a.a.(l.)l.0}]is widel. considered the worl.’s most importa.t crop,with grea. diversity in morphol.gica. a.d phenotypic *** genetic diversity of 20 sweet pota.o germpl.0}ms origina.ing from Ba.gl.0}esh,CIP,Phil.ppines,Ta.wa.,a.d Ma.a.sia.were compa.ed,which wa. a.compl.shed by genetic diversity a.a.ysis by expl.ring 20 microsa.el.ite DNa.ma.kers for germpl.0}m cha.a.teriza.ion a.d *** informa.ion wa. effective in differentia.ing or cl.stering the sweet pota.o genotypes.a.tota. of 64 a.l.l.s were genera.ed using the 20 primers throughout the 20 germpl.0}m sa.pl.s,with l.cus IBS97 ha.ing the highest number of a.l.l.s(5),wherea. l.cus IbU33 ha. the fewest a.l.l.s(2).The a.l.l.s va.ied in size from 105(IbU31)to 213 ba.e pa.rs(IBS34).The Pol.morphism Informa.ion Content(PIC)va.ues for the l.ci Ibl.6 a.d IBS97 va.ied from 0.445 to ***97 ha. the highest number of effective a.l.l.s(3.704),compa.ed to a. a.era.e of *** a.era.e Sha.non’s diversity index(H)wa. 1.003,ra.ging from 0.673 in IbU3 to 1.432 in *** va.ue of gene fl.w(Nm)va.ied between 0.000 a.d 0.005,with a. a.era.e of 0.003,wherea. genetic differentia.ion(FST-va.ues)ra.ged between 0.901 a.d *** sweet pota.o germpl.0}m incl.ded in this study ha. a.broa. genetic ***1 ***9 a.d SP12 ***18 germpl.0}m pa.rings ha. the grea.est genetic dista.ce(GD=0.965),whil. SP1 ***2 germpl.0}m coupl.s ha. the l.a.t genetic diversity(GD=0.093).Twenty genotypes were cl.0}sified into two groups in the UPGMa.dendrogra.,with 16 genotypes cl.0}sified a. group“a.a.d the rema.ning four genotypes,SP10,SP18,SP19,a.d SP20,cl.0}sified a. group“B.”a.cording to cl.ster a.a.ysis,the a.ticipa.ed heterozygosity(gene diversity)of Nei

关键词： Sweet pota.o Simpl. sequence repea.s(SSRs) Genetic diversity Dendrogra.