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Jurnal Natur Indonesia

JN
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Published by Universitas Riau

ISSN : 14109379 EISSN : 25030345 DOI : http://dx.doi.org/10.31258/jnat

Core Subject : Science, Agriculture, Engineering,

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

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.

Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)

Articles 20 Documents

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Search results for , issue "Vol 14, No 1 (2011)" : 20 Documents clear

Pemurnian Emas dari Bijih Emas Berkadar Rendah Menggunakan Karbon Aktif dari Arang Tempurung Kelapa Mulyasuryani, Ani; Ismuyanto, Bambang; Purwonugroho, Danar
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The activated carbon from the coconut shell can be used as an adsorbent for the recovery of gold. The optimum condition for gold recoverywas obtained at pH 3 (for adsorption) and pH 5 (for desorption) with 1 M thyocyanate solution and a 5 cm length of column (the mass ofactivated carbon is 20 grams). In this condition, the average gold recovery is 90.00%, silver 7.28% and copper 4.93%, that were used severalgold ore samples. The average purity degree of gold is 49.67%, depend on the concentration of gold, silver and copper in the gold oresample.

Perbanyakan Tanaman Pulai Pandak (Rauwolfia serpentina L.) dengan Teknik Kultur Jaringan Yunita, Rossa; Endang, Endang; Lestarai, Gati
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Due to over exploitation of its bark for medicinal herbs and made worse by problem in conventional breeding, Rauwolfia serpentina (Pulaipandak), has been considered rare and was currently reported to be an endangered species. Therefore, conservation measure is urgent to betaken. One of them is by in vitro propagation. In this research, in vitro propagation covers several activities, such as (1) shoot inductionwith the application of MS (Murashige and skoog) media enriched with ZPT 0.0; 0.1; 0.3 mg/l BAP combined with 0, 1, 2 mg/l 2ip, (2)shoot multiplication by using 0.0; 0.5; 1.0 mg/l BAP combined with 0.0; 0.1; 0.2 and 0.3 mg/l thidiazuron), (3) root induction IBA at theconcentration of 0.0; 0.5; 1.0; 1.5; 2.0; 2.5; 3.0 mg/l, and (4) acclimatization. The result showed that the best shoot induction for calli isthe in vitro stem by the application of MS + 0.3 mg/l BAP + 1 mg/l 2ip basic media. For shoot multiplication, the best media was MS + 0.5mg/l BAP + 0.1 mg/l ; while the best formula for root induction was MS + 1 mg/l IBA. The best media for plantlet acclimatization is compost+ soil mixture in 1:1 ratio.

Fenologi Mangrove (Rhizophora apiculata, R. mucronata dan R.stylosa) di Pulau Unggas, Air Bangis Pasaman Barat, Sumatera Barat Kamal, Eni
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Phenology of tropical forest plant is a population factor and does not include community factor, this is caused by a genetic determinationand also the influence of the environment. Phenology of plants in mangrove correlated with the time of flowering, fruiting, and productionof fruits or propagules. Phenology research in mangrove plants in the Unggas Island, West Pasaman, done with ‘tagging’ technique method.Signs made of plastic and are numbered. Data collection included from the formation of flower blooming, up to the formation of fruit orpropagules ripe. Phase of the development is categorized to two categories: (a) flower, and (b) fruit. The analysis method is the analysis ofvariance (ANOVA, p<0.01) and post-hoc test, Duncans Multiple Range Test (DMRT, p<0.01) to obtain comparison and differencesbetween the components of flower, flower fall, fruit, and fruit maturity.

Proliferasi Kalus dari Eksplan Hipokotil dan Kotiledon Tanaman Jarak Pagar (Jatropha curcas L.) pada Pemberian 2,4-D Zulkarnain, Zulkarnain; Lizawati, Lizawati
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The aim of this study was to develop an efficient method for the induction of embryogenic callus formation for in vitro propagation ofjatropha. Plant materials used were 30-days old in vitro seedlings, cut into hypocotyl and cotyledon (lower, middle and upper) sections.Medium used was MS composition supplemented with vitamins, 3% sucrose, 0.7% agar at pH 5.8 ± 1, and 2,4-D (0, 1, 2, 3, 4 dan5 mg l-1). Cultures were kept at temperature of 25 ± 1 0C with 50 μmol m-2 s-1 light intensity and 16-h photoperiod. The results indicated thatthe rate of callus formation depended on the source of explant, the application of 2,4-D, and the interaction of both. The fastest callusproliferation (2.33 days following initiation) was obtained on cotyledon explants cultured on medium without 2,4-D. The explant sourcesand 2,4-D concentrations also showed significant effect on the percentage of explant forming callus. The most callus formation (88.33%)was obtained on middle cotyledon cultured on 3 mg l-1 2,4-D, whereas the fewest (6.84%) was found on upper cotyledon cultured on mediumwithout 2,4-D. The colour of callus was dominated by white, light yellow, cream and brown with mostly compact structure, particularly onhypocotyl cultured on medium without 2,4-D. The texture of callus formed on hypocotyl treated with up to 4 mg l -1 2,4-D was dominatedby coarse appearance. In contrast, majority of callus proliferated on hypocotyl treated with 5 mg l -1 2,4-D or cotyledon treated with orwithout 2,4-D produced callus with smooth texture %.

Struktur Komunitas Makrozoobentos di Perairan Sungai Musi Kawasan Pulokerto sebagai Instrumen Biomonitoring Zulkifli, Hilda; Setiawan, Doni
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The Pulokerto region has been planned for agrocity tourism by the Palembang City Government. The changing function of these areas givesome effects to quality of water and biota around the river. The aims of this research is to study of macrozoobenthos structure communityas biomonitoring instrument. The research was conducted during September until December 2010. The location sampling was determinedby purpossive random sampling method in 8 stations. The sampling in the moody area was carried out by Eckman grab. The results showedthat 14 genera have been classified into 5 classes such as Oligochaeta, Gastropoda, Insecta, Bivalvia and Crustacea. Population og. generais in around 75-600 ind/m 2. Diversity index is low until moderate with value 0.27-0.74 and there is no domination of species in thecommunity. The cluster analysis showed that 2 community groups of macrozoobenthos have relation with population of individu tophysicochemical quality of water. The overall study shows the balancing of community in the Pulokerto region but still susceptible topressure effect of environment.

Pemurnian dan Karakterisasi Enzim Lipase dari Aspergillus oryzae pada Kopra Berjamur Dali, Seniwati Dali; Patong, Abdul Rauf; Jalaluddin, Muhammad Noor; Parenrengi, Pirman Andi
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

An investigation on purification and characterization of lipase enzyme production Aspergillus oryzae from copra by fermentation of oliveoil has been carried out. This enzyme can be produced by fermenting olive oil in a medium containing Aspergillus oryzae. Crude enzyme isobtained by centrifuging the medium cultures containing Aspergillus oryzae at 3500 rpm for 30 minutes and than adding 0.2 M borat buffer(pH 8.2). Enzyme activity was determined from paranitrophenol as product of lipase catalysis of paranitrophenylbutirat (0.2 M) assubstrate measured by the Vorderwulbecke method. Prepurification process was by ammonium sulphate fractionation. Precipitation60-80% ammonium sulphate produced maximum activity of enzyme. Purification by Q sepharosa FF and sephadex G-75 collumchromatography produced four and three fractions with purifity of 12.85 and 20.25 times than crude enzyme respectively. Characterizationof this enzyme showed optimum condition at pH 8.2, temperature at 350C, the Km value at 0.046 M, and Vmaks is 1.926 μmol/menit and themolecular weight at 40.7 kDa.

Isoterma dan Termodinamika Adsorpsi Kation Cu2+ Fasa Berair pada Lempung Cengar Terpilar Bahri, Syaiful; Muhdarina, Muhdarina; Nurhayati, Nurhayati; Andiyani, Fitri
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Pillared Cengar clay have been synthesized by two methods, first clay suspension is directly mixed into aqueous solution of hydroxy-aluminum polycations (WK) and second by mixing the clay suspension into the solution of sodium acetate and hydroxy-aluminumpolycations (SAK) sequentially. Both clays were calcined in air on atmospheric condition. Diffraction pola, surface morphology and cationexchange capacity of the pillared clays were characterized using X Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) andvisible spectrophotometry methods, respectively. The pillared clays showed increases of basal spacing from 3.57 Å to 4.55 Å and smectiteas a new mineral. Morphology of SAK has more heterogeneous surface with small plates and agglomeration of grains compare with WKwhich small plates. Adsorption of aqueous cation of Cu 2+ were studied on various variables of initial concentration as well as temperatures.As the result, adsorption of cation Cu 2+ on pillared Cengar clay is corresponding to Freundlich isotherm, while the adsorption capacity ofWK on cation Cu 2+ is slightly lower than SAK. The thermodynamic aspect, the WK is reflected possessed exothermic processes withnegative entropy, increased in Gibbs energy and non spontaneous, while the SAK possessed endothermic processes having positive entropy,decreased in Gibbs energy and non spontaneous.

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

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.

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

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).

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

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.

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Titania T Nugroho

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Home Page

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Editorial Team

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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

Abstract

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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

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Kota pekanbaru,

Riau

INDONESIA