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All Journal Wahana Forestra: Jurnal Kehutanan Jurnal Teknologi Hasil Pertanian
Pramasari, Dwi Ajias
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Agriculture, Biological Sciences & Forestry

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SIFAT FISIS KAYU BERKUALITAS RENDAH DARI RIAU SETELAH MELALUI PROSES PENGAWETAN POHON DENGAN TEKNIK BANDAGE DAN INFUS Sribudiani, Evi; Somadona, Sonia; Sulaeman, Rudianda; Syafrinal, Syafrinal; Yusuf, Sulaeman; Amin, Yusup; Tarmadi, Didi; Pramasari, Dwi Ajias; Damayanti, Ratih; Djarwanto, Djarwanto
Wahana Forestra: Jurnal Kehutanan Vol. 14 No. 2 (2019)
Publisher : Fakultas Kehutanan Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/forestra.v14i2.3515

Abstract

The potential of high-quality wood for various purposes over the past decade is very difficult to obtain. This is due to the high rate of doforestation and forest degradation, especially in Riau Province. Examples of the use of high-quality wood, especially in Riau Province, is as material for creating 'pathways' in the context of preserving track culture in the Kuantan Singingi Regency. The purpose of this study is to determine the physical properties of red balam wood and bintangur that grow in Riau before and after the preservation process, and determine the strength class of red balam wood and bintangur that grows in Riau. The research was carried out on the starur trees and red balam with a diameter of 34-38 cm, tree height 18-22 m. The tree sample comes from the Rumbio customary forest and the Minas Tahura KPHP Riau Province. Examination of physical properties using British standards in 1957. The results showed that based on specific gravity, the red balam wood and bintangur before preserved and included as strong class II. The average moisture content of each wood is 14-30%. The largest wood shrinkage development in each wood occurs at the base of the wood.
Pengaruh Enzim Amilase Brevibacterium sp dan Glukoamilase Terhadap Kemampuan Penjerapanan Minyak Pada Pati Singkong Uzwatania, Fina; Rahma, Putri Ajeng Syahru; Pramasari, Dwi Ajias; Ningrum, Riska Surya; Sondari, Dewi
Jurnal Teknologi Hasil Pertanian Vol 16, No 1 (2023): Februari
Publisher : Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jthp.v16i1.62318

Abstract

Improper oil waste management contributes to environmental degradation, notably water pollution. Because conventional methods for treating oil pollutants are costly and have limited removal efficacy, the use of natural adsorbents is recommended due to their dependability and affordability. The purpose of this study was to see how modified cassava starch affected oil adsorption using two types of enzymes: Brevibacterium sp amylase enzymes derived from Indonesian marine bacteria and commercial amylase enzyme (Dextrozyme® GA).Oil-adsorption degree is applied to several types of oil, including palm oil and olive oil. The findings revealed that the properties of modified starch differed from those of native starch in both physical and chemical terms. The modified starch produced by hydrolysis of the glucoamylase enzyme (Dextrozyme ® GA)had a yield of 80.16 %, reducing sugar content of 0.20 g/L at 24 h, and a particle size of 377 nm, which is lower than the starch hydrolyzed by Brevibacterium sp. In contrast, the degree of oil adsorption in the glucoamylase enzyme (Dextrozyme ® GA) is higher than Brevibacterium sp. Statistical analysis showed that the oil adsorption degree is affected by the type of enzyme, therefore, the modified starch from Brevibacterium sp still needs improvement to be competitive for oil adsorption compared with the modified starch from the glucoamylase enzyme (Dextrozyme ® GA).
Co-Authors Desyandri Desyandri Dewi Sondari Djarwanto Djarwanto Evi Sribudiani Fina Uzwatania Ningrum, Riska Surya Rahma, Putri Ajeng Syahru Rudianda Sulaeman Somadona, Sonia Syafrinal, Syafrinal Tarmadi, Didi Yusuf, Sulaeman Yusup AMIN