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Contact Name
Titania T Nugroho
Contact Email
titania.nugroho@lecturer.unri.ac.id
Phone
+62811764031
Journal Mail Official
natur@ejournal.unri.ac.id
Editorial Address
Gedung LPPM Universitas Riau Jl. HR Subrantas Km 12,5 Pekanbaru 28293
Location
Kota pekanbaru,
Riau
INDONESIA
Jurnal Natur Indonesia
Published by Universitas Riau
ISSN : 14109379     EISSN : 25030345     DOI : http://dx.doi.org/10.31258/jnat
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.
Articles 20 Documents
Search results for , issue "Vol 14, No 1 (2011)" : 20 Documents clear
Penggunaan Zeolit sebagai Pendegradasi Senyawa Permetrin dengan Metoda Fotolisis Zilfa, Zilfa; Suyani, Hamzar; Safni, Safni; Jamarun, Novesar
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.086 KB) | DOI: 10.31258/jnat.14.1.14-18

Abstract

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
Inokulasi Fungi Mikoriza Arbuskula (FMA) Indigenus pada Bibit Jahe untuk Pengendalian Penyakit Layu Ralstonia solanacearum ras 4) Suharti, Netty; Habazar, Trimurti; Nasir, Nasril; Dachryanus, Dachryanus; Jamsari, Jamsari
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (49.568 KB) | DOI: 10.31258/jnat.14.1.61-67

Abstract

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.
Efisiensi Makan Spodoptera exigua (Lepidoptera: Noctuidae) pada Bawang Daun, Sawi Hijau dan Seledri di Laboratorium Hariani, Nova; Ahmad, Intan; Rahayu, Resti
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (73.523 KB) | DOI: 10.31258/jnat.14.1.86-89

Abstract

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.
Penggunaan Mikro Irradiasi Sinar Gamma untuk Meningkatkan Keragaman Genetik pada Varietas Kedelai Argomulyo [Glycine max (L) Merr] Hanafiah, Diana Sofia; Trikoesoemaningtyas, Trikoesoemaningtyas; Yahya, Sudirman; Wirnas, Desta
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (369.697 KB) | DOI: 10.31258/jnat.14.1.80-85

Abstract

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.
Interaksi Kapang Patogen Fusarium oxysporum dengan Bakteri Kitinolitik Rizosfer Tanaman Jahe dan Pisang Ferniah, Rejeki Siti; Pujiyanto, Sri; Purwantisari, Susiana; Supriyadi, Supriyadi
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (51.542 KB) | DOI: 10.31258/jnat.14.1.56-60

Abstract

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.
Kemampuan Kitinase Streptomyces RKt5 sebagai Antijamur terhadap Patogen Fusarium oxysporum Yurnaliza, Yurnaliza; Margino, Sebastian; Sembiring, Langkah
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.537 KB) | DOI: 10.31258/jnat.14.1.42-46

Abstract

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.
Kajian Awal Pemanfaatan Rumput Teki (Fimbristylis sp), Linggi (Penicum sp) dan Sianik (Carex sp) sebagai Serat Alami untuk Bahan Alat Penangkapan Ikan Nofrizal, Nofrizal; Ahmad, Muchtar; Syofyan, Irwandy; Habibie, Ied
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (425.108 KB) | DOI: 10.31258/jnat.14.1.100-106

Abstract

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.
Kestabilan Inokulan Azotobacter selama Penyimpanan pada Dua Suhu Hindersah, Reginawanti; Sudirja, Rija
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (40.395 KB) | DOI: 10.31258/jnat.14.1.52-55

Abstract

Azotobacter might be used as biological agents in bioremediation of heavy metal-contaminated soil since this rhizobacteria produceexopolysachharides (EPS) that mobilize soil heavy metals, and phytohormones that regulate root growth. So that heavy metal uptake bythe roots could be increased. The objective of this research was to verify the stability of EPS and phytohormones in Azotobacter liquidinoculants during four months in different temperature storage. Liquid inoculants has been produced in EPS-induced media and stored in200C and room temperature (24-270C) during four months. The results showed that the better temperature storage was room temperatureinstead of 20 0C since pH, total N, and EPS and phytohormones content was relatively stable during storage.
Pemanfaatan Data Biologi Ikan Cakalang (Katsuwonus pelamis) dalam Rangka Pengelolaan Perikanan Bertanggung Jawab di Perairan Teluk Bone Jamal, Muhammad; Sondita, Muhammad Fedi Alfiadi; Haluan, John; Wiryawan, Budy
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (345.512 KB) | DOI: 10.31258/jnat.14.1.107-113

Abstract

The Bone Bay is part of Fisheries Management Zone WPPI 713 that covers Makassar strait, Flores sea and Bali sea. To such vast marinearea, fisheries management can be started from smaller region, e.g. embayment waters. Biological characteristics of skipjack tuna (Katsuwonuspelamis) are some of important information for developing fisheries management in the area. This research was aimed to determine length-weight relationship, size composititon, growth pattern and biologically feasible size of the fish. Data were obtained from fish caught byfisherman from Januari to December 2007. The bay was divided into three study areas, i.e. Northern, Centre and Southern Zones. The bcoefficients for length-weight relationship in the three zones were equal 3 [not significant]. The average fork-length (FL) in each zoneshowed similar trends: increased from January to June, then stabilized until December. Using von Bertalanffy’s growth model, the maximumFL (L ∞ of 759.75 mm is estimated for fish at age of 84 months. The length at first maturity of the fish is 465 mm (FL).
Pewarisan Sifat Densitas Stomata dan Laju Kehilangan Air Daun (rate leaf water loss RWL) pada Kacang Tanah (Arachis hypogaea L.) Adisyahputra, Adisyahputra; Sudarsono, Sudarsono; Setiawan, Kukuh
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (453.975 KB) | DOI: 10.31258/jnat.14.1.73-89

Abstract

The aim of this research is to analyze and examine the inheritance of stomatal density trait and RWL as a variable in drought tolerance ofpeanut. The experiment was conducted by using cv. Kelinci that is sensitive genotype as female parent and US 605 which is tolerantgenotype as male parent, including population off spring from hybrid cv. Kelinci (P1) with US 605 (P2). Stomatal density was determinedby making leaf imprint and by observing leaf imprint under microscope. Relative water loss was determined by dipping peanut leaf in PEG40% for 48 hours. Result of the analysis showed that stomatal density and RWL were not only controlled by qualitative characters of majorgene, but also controlled by quantitative character of minor gene by polygenic with the complex gene action. Both characters seem toinfluence more as genetic factor and have high level fixation additive varians which can give the opportunity to obtain the tolerant offspring.

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