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All Journal Jurnal Matoa PERENNIAL Repong Damar: Jurnal Pengabdian Kehutanan dan Lingkungan
Beta Putranto
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science

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Journal : PERENNIAL

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ASPEK BIOLOGIS ULATSUTERA (Bombyx mori L.) DARI DUA SUMBER BIBIT DI SULAWESI SELATAN Sitti Nuraeni; Beta Putranto
PERENNIAL Vol. 4 No. 1 (2008)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v4i1.177

Abstract

The purpose of this research to compared the biological aspect of silkworm seeds with two resources of seeds in South Sulawesi are Perum Perhutani (P1) and China hybrid (P2). The result of this research can be information for user of the sericulture. The observation will be done the hatchability of eggs, resistance of larva, and the characteristic of the larval. The observation of the cocoon quality such as whole fresh cocoon weight, the cocoon without pupa weight, the presentation of shell cocoon, the presentation of abnormal cocoon, and the characteristic of the cocoon. The data was analyzed with using proportion different test and t-student test. The result of this research was showed that hatchability of kind eggs as not significant. The resistance of larva as the higher from P2 and presentation of abnormal cocoon was lower. So the cocoon without pupa was not significant with the seeds from P1, but the cocoon weight and size of cocoon are bigger than from P2. Both larva motif and cocoon characteristic from P1 and from China hybrid is significant, but larva stadia from P2 was shorter than from P1. Key words : Biological aspect, silkworm (Bombyx mori), seeds resources References
MODEL DISTRIBUSI DIAMETER LIMA JENIS POHON PADA HUTAN TROPIKA BASAH DI KABUPATEN MAMUJU, SULAWESI BARAT Beta Putranto
PERENNIAL Vol. 6 No. 1 (2010)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v6i1.197

Abstract

The objective of this research is to establish the most suitable tree diameter distribution model for five tree species on tropical rain forest in Mamuju District. This research was conducted on two locations. The 50 square plots were sampled systematically for seedling, sapling, pole and tree measurements of bintangur, jambu-jambu, lada-lada, matoa and nyatoh species. The distance among plots was 50 m. Variables to be measured were stem number of seedlings to trees and tree diameter at breast height (1,3 m) of saplings to trees. About 70% of the data were used to establish the best model, the rest of 30% were used to validate the model. Models to be analyzed were fourth-order semi-logarithmic transformed polynomial function, Weibull density function and monotonic decreasing Weibull function. The results show that the five tree species have a similar diameter distribution pattern. The shape of this distribution is the typical of uneven-aged stand distribution on natural forest, namely reversed J shape. The most suitable model for five species is second-order semi-logarithmic transformed polynomial function. Key words: model, diameter distribution, natural forest, uneven-aged stand.
ANALISIS KEBUTUHAN BAHAN BAKU KAYU BULAT PADA INDUSTRI KAYU LAPIS PT. KATINGAN TIMBER CELEBES . Makkarennu; Beta Putranto; M. Daniel Dessaratu
PERENNIAL Vol. 6 No. 2 (2010)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v6i2.206

Abstract

The aim of this research was to predict the amounts of raw materials needed by industry for the next years. This study was conducted at the plywood industry in PT.Katingan Timber Celebes. For the purpose of the study, utilisation of raw material for five years (2004-2008) were collected. The obtained data were analyzed by using regresi with time series data. It is predicted that the amount of raw material for the industry (2009) will be 166,758.2 m3 consisting of meranti (130,699.4 m3) and rimba campuran (36,053.8 m3) Key words: prediction, plywood industry, utilisation of raw material
KONDISI OPTIMUM PROSES KEMPA PANAS DALAM PEMBUATAN PAPAN PARTIKEL DENGAN PEREKAT KITOSAN Lestian Lindangan; Beta Putranto; Suhasman Suhasman; Agussalim Agussalim
PERENNIAL Vol. 15 No. 2 (2019)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v15i2.7650

Abstract

Shrimp skin contains chitin that is the second largest biopolymer after cellulose. The chitin can be isolated to produce chitosan. Chitosan is a natural adhesive that can be applied in producing particleboards to substitute formaldehyde-based adhesives. The purpose of this study was to analyze the hot-pressing condition in term of temperature and pressing time on the physical and mechanical properties of the particleboards produced by using chitosan as adhesives. The particleboards were made with the size of 25x25x0.7 cm and target density of 0.75 g/cm3. The particleboards were produced using different temperatures (160ºC, 180ºC, and 200ºC) and pressing times (9, 12, and 15 minutes. The results showed that the chitosan produced met the standards, and temperature and compression time had a significant interaction effect on the thickness swelling and modulus of elasticity. The optimum combination of temperature and pressing time is 180ºC and 12 minutes, respectively. The produced boards have the characteristics of moisture content 12.2%, density 0.81, water absorption 84.47%, thickness swelling 19.73%, modulus of rupture 143.36 kg/cm2, modulus of elasticity 23,367.79 kg/cm2, and internal bonding 9.03 kg/cm2.
Co-Authors . Makkarennu A Agussalim Agussalim Agussalim Andi Detti Yunianti Baharuddin Baharuddin Djamal Sanusi IRA TASKIRAWATI Lestian Lindangan M, Daud M. Daniel Dessaratu S Suhasman Sitti Nuraeni Suhasman Suhasman Syahidah Syahidah