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Barly
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Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Materials Science & Nanotechnology

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SIFAT FISIS DAN STABILISASI DIMENSI BEBERAPA JENIS BAMBU KOMERSIAL Barly; Agus Ismanto; Dominicus Martono; Abdurachman; Andianto
Jurnal Penelitian Hasil Hutan Vol. 30 No. 3 (2012): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2012.30.3.163-170

Abstract

This experiment aims to look into appropriate formulate which may improve physical 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, ie.bijan or ater (236.15%), mayan (181.52%), tali (117.32%), and hitam (111.83%). Likewise, bamboo density also varied, ie, tali (0.93), andong (0.88), mayan (0.83), bijan 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 varieds according to bamboo species, i.e. mayan (9.04%), betung (15.75%), andong (16.32%), and ater (38,45%). The bigbest ASE percentage (95.57%) occured at ater (LO), while the lowest (-144,92%) was of mayan (SCa). Bamboo that afford responses to ASE percentage value was arranged from the bighest, i.e. LO, PEG, SPA, B, A, C. The LO agent was absorbed the least by all bamboo species, followed in increasing order by PEG with the expection of hitam hamboo, Bamboo that absorbed the swell-resisting order by PEG with the least was the andong (14.22%) with LO, and the greatest inflicted by bitam (137,54%) with PEG, Almost all bamban species were able to absorb the entire swell-resisting agents in large amount. The retention of agents in dry bamboo was arranged in order from the bigbest to the Inwest, ie. PEG, LO, SCa, and SPo The highest to the lowest retentions were of consecutively hitam, ater, tutul, andang, mayan, and betung.
PENGARUH PERENDAMAN MENGGUNAKAN LARUTAN CAMPURAN TEMBAGA SULFAT DAN NIKEL NITRAT TERHADAP WARNA PERMUKAAN BAMBU Gigantochloa apus Kurz. Barly; Susilawati
Jurnal Penelitian Hasil Hutan Vol. 30 No. 2 (2012): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2012.30.2.87-93

Abstract

Bamboo eschibits changes of its attractive green-colored skin inta ivory yellow. Bamboo colour wall turn into dark grey when immersed in water or kept in damp place. Consequently, an attempt is required to prevent such color changes on the surface of bamben skin. This remarch looks into the effectiveness of copper sulfate and nickel nitrate mixture in water based solution to maintain the green color on the skin surface of hambos (Gigantochloa apus Kurtz). The solution is employed in various proportions (w/w) and concentrations. Color innrpretation on the bamboo-skin surface wat assisted wting the so-called CDX's enfor difference meter device based on three-dimensional CIE (L*a*,*) principle. It turned out that intensity of green color on the skin of bamboo trunk at its top (upper) portion and middle portion was greaterthan that of the butt (lower) portion. Furfber, the use of copper culfate nickel nitrate miscture mlution at 4.0:3.5 proportion and in 7.5% concentration inflicted the greatest intensity of green color (", ", and be in average consecutively 61.8, -14.3, and 18.3) on the bamboo-skin, and concurrently afforded the inat prevention of such green color.
PENGAWETAN WARNA KAYU TUSAM (Pinus merkusii) DAN PULAI (Alstonia sp.) DENGAN MENGGUNAKAN BAHAN DASAR DISINFEKTAN Barly; Agus Ismanto; Dominicus Martono; Abdurachman
Jurnal Penelitian Hasil Hutan Vol. 30 No. 2 (2012): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2012.30.2.155-162

Abstract

Wood color can vary much between species but the variations tends to be smaller within the same species. Noticeable deviations in color at timber surface or in the core of the same board my cause problems in timber trading or in final product's appearance. Undesirable discoloration often develops during wood drying process. The research aims to study natural color changes of Pulai (Alstonia sp.) and Pine (Pinus merkusii). Prevention of wood color change is undertaken by using active ingredients of benzylkonium chloride (A and D), phenol (B and C), creselic acid (E), sodium bypochlorite (F) and methylen-bis-thiocyanate (G). The treated wood samples together with their controls were then kept in three different conditions, i.e. conditioning room at 70 RH and temperature of 18 C, in the terrace and in the oven with temperatures of 60 C and 120 C. The test results demonstrate that the bigbest brightness (L") was obtained at Pulai the wood surface and inside the wood block using formulation of D, namely 87.3 and 89.3 with a total value of the brightness variation (AL) -6.7 and -4.7. However, the bigbest brightness of Pine wood was acchiered using formulation, namely 83.5 and 80.0 with a total variation of brightnest of -10.5 and-14.0. These value swere obtained from samples stored in low temperature and bumidity (air conditioned).
Co-Authors Abdurachman Agus Ismanto Andianto Dominicus Martono Susilawati