Jurnal Penelitian Hasil Hutan

163-170

Authors: Bady,Agus Ismanto,Dominicus Martono, Abdurachman & Andianto

This experiment aims to look into appropriate formulate lvhich may improve pbysica! properties and dimentional stability of bamboos to optimize their uses as construction materials. Results revealed that length of culm (stem), number of internodes, and internode length varied in accord with different bamboo species. Moisture content of bamboo varied depending on species, i.e.bija« orater(236.15%), mayan (181.52%), tali (117.32%), and hitam (111.83%).Likewise, bamboo density also varied, i.e.tali (0.93), andong (0.88), mayan (0.83),hijau or ater (0. 79), hitam (0.78), and betung (0. 78). The density of bamboo decreases in cross-section moving from the periphery,middle to inner part.Volumetric shrinkage uarieds according to bamboo species, i.e. mayan (9.04%),betung (15.75%),andong(16.32%), and ater (38,45%).The highest ASE percentage (95.57%) occured at ater (LO), 1vhile the lowest (-144.92%) u/as of mayan (SC a). Bamboo that afford responses to ASE percentage value was arrangedfrom the highest, i.e. LO, PEG, SPo, B, A, C. The LO agent iuas absorbed the least l?J all bamboo species,foll01ved in increasing order by PEG with the expection of hitam bamboo. Bamboo that absorbed the suell-resisting order by PEG 1vith the least was the andong (14.22%) with LO, and the greatest inflicted l?J hitam (13 7.54%) untb PEG. Almost all bamboo species uere able to absorb the entire s1vell-resisting agents in largeamount.The retention of agentsin dry bamboo was arranged in orderfrom the highest to the lowest, i.e. PEG, LO, SCa, and SPo.The highest to the lowest retentions n/ere of consecutiveay hitam, ater, tutu,andong,mayan, and betung.

287-300

Authors: Nani Nuriyatin & Ku.rnia Sofyan

The abundant availabili!Jof bamboos in Indonesiahasprot1ptedtheirpossibleusesas raw materiaflar pulp and paper.This is expectedto replace its co"esponding conventional raw 111aterials (i.e.woods),1JJhich nowadqys tend to bedwindling,scarce,and lit11ited In relevant,this research aims to assess the suitabilily of bamboo stemfar I11ch comprision several species.The groupingof bamboo species brought out the resalts.i.Arundinaria hllndsii and.Arundinaria javonica as pattern 1; Cephalostachyum pergracile andMelocanna baccifera as pattern 2; Dendrocalamus strictus and Dendrocalamusgiganteus as pattern 3;and Dendrocalamus asper and Gigantochloa apus as patterns 3 and 4).In assessingthe bamboo suitability far pulp and paper, an approach 1JJastakfin wherel?J the bamboospecies in the particalar pattern was examined offiber dimensions (i.e. fiber length,.fiberjlexibili!J, rigidi!J coefficient, &mkel ratio,and M11hlstep ratio).To evaluate whether there were significant differences in the examination]determination results a111ong those 4 patterns, the analysis of variances(probabili!Jlevels)with completely standardized one-faaor design was e111pk?Jedfallowed with the differentrangetest of the resultingmeans(i.e. T11ck4'fprocedares}. Thefactor was thosefour ba111boopatterns.R.esr1ltsrevealedthat each of thosefourpatterns basedon.fiberlength andfeltingpowerbelongedto class I, indicating as the mos»'[auourablfear pulp and paper.Meanwhile, otherscroti'!J based onfiber flexibility,ri.ftdity coefficient, &mkfilratio, and Mr1hlstep ratio turnd out that all the patterns belongedto class III.Further;bamboo species catagoriedas pattern I exhibitedspecies charactersII/ch as affordingt hehighest. fiberjlexibili!Jandlowest rigidi!Jcoefficient as 1vell as nmkfil ratio compared to those of the atherpatterns.Meanwhile,bamboo species inpattern 4 exhibitedthe highest.fiberlengthandjeltingpower.Ultimate!J, assessmenton the overall.fiber dimensions and their derivedualuescame about that all thefa11r bamboopattern belongedto class III, asindicativequalitiesof the res11ltingpulpand paper However,to 111akfi sure whether I11ch indicationproved true, furtherin-depthresearch on thepulp and paperprocessingjro111those entirebamboos (pattern 1 until 4) deservescarryingout.

312-321

Authors: Sita Heris Anita,Dede Herl Yuli Yanto & Widya Fatriasari1

The lltilization of black liquor produced in p11lp and paper production has been limitedfor adhesive. Jn microbiology,blackliquorcan be usedas a selectivemedium. The purpose of thi.rsturfy 11Jas to evaluatetheperjortnacne of lignin isolated from black liq11orof biop11lpingproms as a selectivemediu111far J1Jhite-rotfungi.Ugninf,ro111 black liquor of soda and kraftpulping of bamboopetung iuas isolatedby acid addition. Ugninsolid iuas thenpurifiedusing dioxan solution, 11Jeighted and qualitative/yana/yzed usinga spectrophotometer.The isolated lignin11Jas added to agar media to test the 1vhite-roft ungi selectivi!J (Phanerochaetecrysosporium and Trame/es versicolor).The results sboued that pretreafflJentof bamboofar 30 dqysgive more lignin than the 45-dqys treatedbamboo. Ugnin solidfrom kraft processwas also higher than ligninfromsoda process. Enzyme secretionfromfungiT. uersicoloroccursmore rapid/ythan P chrysosporium on selectivemediaalkali-lignin

356-368

Authors: Andianto

Pulau Alstonia sp.J belonging to the family Apocynaceae, produces latex which is .frequently used as a traditionalmedicine.Variousliteratureson 111edicinal tree species.frequently mention about it, but a description of the wood and bark anatomy of pulai up to the species level is hardly found Anatomical structure of wood and bark of Alstonia scholaris, A. angustiloba and A. pneumatophora were observedon samplesproduced using a microtome. Dimensionsof woodfiber and vesselcells also weremeasured Observations showed that the three species of pulaiwood can be distinguished'from the differences in diameter and.frequency of vessel cells, type and arrange111ent ofparenclly111a cells, width and composition of the rqycells. The bark of these species can be distinguishedbased on theform of sklereid cells and thepresenceof dilationed rqycells (IPideningrqycell).