Jurnal Natur Indonesia
JURNAL NATUR INDONESIA terbit sejak tahun 1998, merupakan jurnal ilmu sains yang menyajikan artikel mengenai hasil penelitian, pemikiran dan pandangan dari peneliti dan pakar dalam bidang biosains (ilmu dasar), meliputi biologi, fisika, kimia dan matematika. Jurnal Natur Indonesia melibatkan mitra bestari yang menelaah setiap artikel sesuai dengan bidang ilmunya. Nama dan asal institusi mitra bestari tersebut tercantum pada halaman bagian normor 2 dari setiap volume penerbitan. Jurnal ini diterbitkan setahun dua kali, pada bulan April dan Oktober.
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<![CDATA[Aktivitas Peroksidase Mutan Pisang Kepok dengan Ethyl Methane Sulphonate (EMS) secara In Vitro 1 ]]>
<![CDATA[Yanti, Yulmira]]>
<![CDATA[ Jurnal Natur Indonesia Vol 14, No 1 (2011) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau ]]>
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DOI: 10.31258/jnat.14.1.32-36
<![CDATA[The activity of peroxidase were observed in leave of banana clone Kepok resulting by treatments EMS. The phenotype of peroxidase wasanalyzed from the banana clones resulting the induced by EMS and without induction after inoculated with pathogen Banana Blood deasesBacterium (BBD). The objectives of research are know variation of activity and band pattern of peroxidase. Induced mutation treatmentsconsist of control, 0.2% EMS for 1 and 3 hours, 0.5% for 1 and 3 hours, each treatments was provided five banana clones. The result showedthat variant value and coefisien variant of peroxidase activity in leaf tissue of clone treated by EMS increased compare to the control. Avariant control is 0.28 with coefisien variant is 29.92%, while variant value of treatment is 8.45 with coefisien variant is 75.75%.Appearance of peroxidase bands on clone resulting by EMS treatments were emerged four band pattern. The first and control band patternhas relative migration distance is 20 and 30, the second 15, 40 and 60, the third is 15, 35 and 50. There are four bands with different relativemigration distance that indicated polymorphic.]]>
<![CDATA[Phylogeography and Genetic Diversity of Humpback Grouper Cromileptes altivelis based on Cytochrome C Oxidase I ]]>
<![CDATA[Susanto, Agus Hery]]>;
<![CDATA[Nuryanto, Agus]]>;
<![CDATA[Soedibja, Petrus Hary Tjahja]]>
<![CDATA[ Jurnal Natur Indonesia Vol 14, No 1 (2011) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau ]]>
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DOI: 10.31258/jnat.14.1.47-51
<![CDATA[Humpback grouper is one of the most popular fish group in the international live trade in Asia-Pacific regions. The price for one kilogramlive of humpback grouper, especially in Spermonde Archipelago South of Sulawesi, is range from 350.000-400.000 IDR, whereas in theretail level in Hong Kong the price was about 92 US$. This condition leads to the reduction of nature population due to overexploitation.Population decreasing due to overexploitation may cause loss of genetic diversity within population and lead to reduce of potentialadaptive, population resistance, and productivity. Therefore, it is important to do some efforts to avoid adverse effect of overexploitationon humpback grouper population in Indonesia. One of the valuable efforts is providing genetic information such as phylogeography andgenetic diversity of humpback grouper Cromileptes altivelis. Analysis was based on 618 base pairs fragment of cytochrome c oxidase I genefrom 36 individuals (sequences) of Cromileptes altivelis collected at four different sites (e.g. Pulau Seribu, Jepara, Situbondo and SpermondeArchipelago). The results showed that humpback grouper population has a high haplotype and nucleotide diversity. However, high geneticdiversity and polymorphisms could not reveal population fragmentation (Φ stt = 0.000). It is suggested that high gene flow rather thanpopulation sub structuring was occurred. High level genetic diversity and polymorphisms are vital related to adaptive potential toenvironmental alteration.]]>
<![CDATA[Kajian Awal Pemanfaatan Rumput Teki (Fimbristylis sp), Linggi (Penicum sp) dan Sianik (Carex sp) sebagai Serat Alami untuk Bahan Alat Penangkapan Ikan ]]>
<![CDATA[Nofrizal, Nofrizal]]>;
<![CDATA[Ahmad, Muchtar]]>;
<![CDATA[Syofyan, Irwandy]]>;
<![CDATA[Habibie, Ied]]>
<![CDATA[ Jurnal Natur Indonesia Vol 14, No 1 (2011) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau ]]>
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DOI: 10.31258/jnat.14.1.100-106
<![CDATA[This research was aimed to study about the potential of fiber structure teki grass (Fimbristylis sp), linggi grass (Penicum sp) and sianik grass(Carex sp) as natural fibre for fishing gear materials. The parameter of this research are; water content, elongation, breaking strength andhistology of the fiber. This research used the observation and experimental method. The observation method is used to know the fiberstructure and water content of teki grass, linggi grass and sianik grass. The experimental method was used to test the breaking strength andelongation of the objects in wet and dry condition. Based on the histology observation, teki grass has an epidermis layers as fiber structure.It consists of parenchyma tissue and collenchymas tissue.Fiber structure of linggi grass and sianik grass are similar with teki grass. Sianikgrass has the most excessive epidermis layer than others i.e. 5.57 gram. The average water content of teki grass is 1.03 gram, and linggi grassis 0.17 gram. Based on the breaking strength test, sianik grass is stronger than others with average strength 9.05 kgf in wet condition and9.75 kgf in dry condition. Meanwhile, breaking strength of the teki grass and linggi grass is 3.20 kgf and 4.16 kgf in wet condition and 4.30kgf and 5.25 kgf in dry condition. The average of the elongation of sianik grass is longer than others i.e. 24.50 mm in wet condition and18.75 mm in dry condition. The elongation of teki grass is 9.05 mm in wet condition and 11.10 in dry condition. The average of linggi grasselongation is 12.20 mm in wet condition and 12.90 mm in dry condition. Based on the breaking strength and the elongation test, the resultshowed that sianik grass is the most potential natural fiber as fishing gear material.]]>
<![CDATA[Interaksi Kapang Patogen Fusarium oxysporum dengan Bakteri Kitinolitik Rizosfer Tanaman Jahe dan Pisang ]]>
<![CDATA[Ferniah, Rejeki Siti]]>;
<![CDATA[Pujiyanto, Sri]]>;
<![CDATA[Purwantisari, Susiana]]>;
<![CDATA[Supriyadi, Supriyadi]]>
<![CDATA[ Jurnal Natur Indonesia Vol 14, No 1 (2011) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau ]]>
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DOI: 10.31258/jnat.14.1.56-60
<![CDATA[Fusarium oxysporum is a pathogenic fungi for many plants. The fungi have chitin cell wall that can be degraded by chitinase fromchitinolytic bacteria. Aim of this research is determine how the interaction between the bacteria and F.oxysporum. Bacteria were isolatedfrom plant rizosfere. Chitinolytic activity were measured based on the clear zone around the colony in chitin medium. Bacteria and fungiinteraction were determined by an antagonistic test. This research showed that there were 9 chitinolytic bacteria. J4 and P3 had highchitinolytic index, that are 3 and 3.33, respectively. The two isolates antagonist to F.oxysporum, which the bacteria prevent growth of thefungi. The J4 and P3 are alternative biofungicide for F.oxysporum.]]>
<![CDATA[Kemampuan Kitinase Streptomyces RKt5 sebagai Antijamur terhadap Patogen Fusarium oxysporum ]]>
<![CDATA[Yurnaliza, Yurnaliza]]>;
<![CDATA[Margino, Sebastian]]>;
<![CDATA[Sembiring, Langkah]]>
<![CDATA[ Jurnal Natur Indonesia Vol 14, No 1 (2011) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau ]]>
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DOI: 10.31258/jnat.14.1.42-46
<![CDATA[The purpose of the reasearch is to determine of antifungal activity from chitinase from Streptomyces RKt5 to inhibite growth of Fusariumoxysporum. The chitinase of Streptomyces RKt5 produced in liquid chitin medium with optimum conditions (inoculum concentration, pHand incubation time) and then partially purified with ammonium sulphate. The enzyme products were tested the antifungal activity againstF.oxysporum. The results showed that mycelial growth of F.oxysporum can be inhibited by Streptomyces RKt 5 in dual culture test. Thepartial purified chitinase enzyme couldn’t inhibit the fungal growth. But if the mycellium fragmented, the enzyme could degrade the fungalcell wall in incubation time. The frequency of fungal cell wall lysis and levels of N-acetylglucosamine released that have been increasingalong with the length of incubation time.]]>
<![CDATA[Penggunaan Mikro Irradiasi Sinar Gamma untuk Meningkatkan Keragaman Genetik pada Varietas Kedelai Argomulyo [Glycine max (L) Merr] ]]>
<![CDATA[Hanafiah, Diana Sofia]]>;
<![CDATA[Trikoesoemaningtyas, Trikoesoemaningtyas]]>;
<![CDATA[Yahya, Sudirman]]>;
<![CDATA[Wirnas, Desta]]>
<![CDATA[ Jurnal Natur Indonesia Vol 14, No 1 (2011) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau ]]>
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DOI: 10.31258/jnat.14.1.80-85
<![CDATA[This research used gamma ray irradiation on low doses (micro mutation). The aim of this research was to know the respons of doses level bymicro mutation on gamma ray irridation to the growing and development of Argomulyo variety of Glycine max (L) Merr (M1), the seeds isirradiated by gamma ray by micro mutation was 0 Gy, 50 Gy, 100 Gy, 150 Gy, and 200 Gy. Variation that obtained of each characters atgeneration M1 and M2 influences plants growth and development either through qualitative and quantitative that finally will influence plantsproduction. The average highest genetic variation at M 2 generation of soybean was on 200 Gy doses. Results of the research indicated thatgamma ray irradiation on 200 Gy doses was effective caused of plant variation genetic.]]>
<![CDATA[Efisiensi Makan Spodoptera exigua (Lepidoptera: Noctuidae) pada Bawang Daun, Sawi Hijau dan Seledri di Laboratorium ]]>
<![CDATA[Hariani, Nova]]>;
<![CDATA[Ahmad, Intan]]>;
<![CDATA[Rahayu, Resti]]>
<![CDATA[ Jurnal Natur Indonesia Vol 14, No 1 (2011) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau ]]>
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DOI: 10.31258/jnat.14.1.86-89
<![CDATA[The aim of this research is to gain further understanding of how particular insect species respons to different host plants. This research isconsidered as preliminary research in integrated pest management for Spodoptera exigua. We report herein the consumption and utilizationof green onion (Allium fistulosum), caisin (Brassica rapa subsp. Parachinensis) and celery (Apium graveolens) by Spodoptera exigua. Theevaluation of indices of food consumption, growth and food utilization showed that caisin (Brassica rapa subsp. Parachinensis) was the bestfood for the last instar larvae of S. exigua as compared with celery or green onion. Growth rates and efficiency of conversion of ingestedfood to biomass (ECI) were significantly higher for larvae fed caisin (11.93%) than for those given green onion (8.06%) or celery (7.74%)Although the protein content of caisin (2.23%) was a bit lower than that of green onion (2.45%) but higher than celery (1.28%), we suspectthat the larvae performed best in caisin due to good balance between protein and carbohydrate as well as water content in caisin as comparedwith other host plants.]]>
<![CDATA[Inokulasi Fungi Mikoriza Arbuskula (FMA) Indigenus pada Bibit Jahe untuk Pengendalian Penyakit Layu Ralstonia solanacearum ras 4) ]]>
<![CDATA[Suharti, Netty]]>;
<![CDATA[Habazar, Trimurti]]>;
<![CDATA[Nasir, Nasril]]>;
<![CDATA[Dachryanus, Dachryanus]]>;
<![CDATA[Jamsari, Jamsari]]>
<![CDATA[ Jurnal Natur Indonesia Vol 14, No 1 (2011) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau ]]>
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DOI: 10.31258/jnat.14.1.61-67
<![CDATA[Bacterial wilt disease caused by Ralstonia solanacearum race 4 is one of factors inhibiting ginger production. The study on ArbuscularMychorrizae Fungus (AMF) in greenhouse was found could reduce of bacteria wilt disease. Experiment design of research was randomizedblock design using 8 isolates. The results showed that inoculation of Arbuscular Mychorrhizae Fungus isolated from healthy gingerrhizosphere as biological diseases control agents could reduces disease severity. Four isolate could reduced disease severity up to 100% andsupport plant growth and production. As the result the seedling formation increased by 50–150%, plant height 36.92–87.56%, the numberof leaf 61.94–162.22% and ginger yield 190.62–400% respectively, compared to the control.]]>
<![CDATA[Penggunaan Zeolit sebagai Pendegradasi Senyawa Permetrin dengan Metoda Fotolisis ]]>
<![CDATA[Zilfa, Zilfa]]>;
<![CDATA[Suyani, Hamzar]]>;
<![CDATA[Safni, Safni]]>;
<![CDATA[Jamarun, Novesar]]>
<![CDATA[ Jurnal Natur Indonesia Vol 14, No 1 (2011) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau ]]>
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DOI: 10.31258/jnat.14.1.14-18
<![CDATA[The research about the degradation of permethryn compound has been done by photolysis method using natural zeolyte as catalyst.Permethryn is one syntetic pyretroid pesticides that low toxicity for mammals but it is high toxicity for fishs, insects and water microorganisms.Zeolyte is aluminosilicate minerals that can be used for degradation of permethryn. Percentage degradation of permethryn is lower withoutzeolyte than using zeolyte as catalyst by photolysis method. 20 mg/l permethryn solution could be degraded 5.40% after 120 minutesirradiation, while by adding 0.20 g natural zeolyte, permethryn could be degraded 69.70]]>
<![CDATA[Enzyme–Catalysed Synthesis of Palm-Based Wax Esters-A Kinetic Study ]]>
<![CDATA[Gunawan, Erin Ryantin]]>;
<![CDATA[Basri, Mahiran]]>;
<![CDATA[Suhendra, Dedy]]>
<![CDATA[ Jurnal Natur Indonesia Vol 14, No 1 (2011) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau ]]>
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DOI: 10.31258/jnat.14.1.37-41
<![CDATA[Wax esters are long chain esters that are derived from fatty acids and alcohols with chain lengths of 12 carbons or more. Wax esters havea wide range of application in industrial especially in cosmetics. The present work focuses on the synthesis of wax esters by alcoholysisreaction from palm oil and oleyl alcohol in hexane by lipase from Rhizomucor meihei (Lipozyme IM). Effect of various concentrations ofpalm oil and oleyl alcohol were studied to deduce the kinetics and mechanism of the reaction. The alcoholysis reaction followed Michaelis-Menten kinetics. The reaction follows a Ping-pong Bi-Bi mechanism. The maximum rate was estimated to be 6 x 10 -3 mmol/h. mg catalystand the Michaelis-Menten constant for palm oil and oleyl alcohol were 4.145 M and 6.120 M, respectively.]]>
