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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 10 Documents
Search results for , issue "Vol 10, No 1 (2007)" : 10 Documents clear
Amobilisasi Inulinase Aspergillus clavatus Gmn 11.3 Galur Lokal Indonesia dengan Matrik Karbon Aktif Saryono, Saryono; R.M, Henny Olivia; Sepriana, Elvita; Dahliati, Andi; A.M, Chainulfiffah
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (94.496 KB) | DOI: 10.31258/jnat.10.1.31-35

Abstract

Two types of inulinase are produced by Aspergillus clavatus Gmn 11.3 within the 3rd and 5th days of fermentation. The optimum condition of two types of immobilized inulinase is achieved using 20 grams of activated carbon, 200 meshes with protein adsorption of 96.71% and 96.19% respectively. Following immobilization of inulinase, incubation was carried out for 30 hours to hydrolyze inulin. After incubation, the proteins retained on the matrix are 66.96% of the 3 days fermentation enzymes and 37.36% for 5 days of fermentation enzyme.
Genetic Variability of Five Provenances of Eboni Restu, Muhammad; Naiem, Mohammad
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.10.1.1-5

Abstract

A research was conducted to determine genetic variability and structure of ebony either within provenances or within trees in the same provenance using isozyme analyses. Results of this study are expected to show genetic variability of ebony with different provenances. For the purpose of the study, five provenances of ebony (Maros,Barru, Sidrap, Malili, and Mamuju) were prepared. The isozyme analysis using electrophoresis was applied to determine the genetic variability. The obtained data were statistically analyzed using multivariate and dendrogram analyses with Numerical Taxonomy System (NTSYS) Program applying unwighted pairgroup method and arrithmetic average (UPGMA) approach. Results showed that the variability of genetic provenances of ebony were less than any other tree species. Among the existing provenances, Barru dan Mamuju showed higher genetic variability compared to other provenances. Ebony provenance was generally found to homozygously increase or to performinbreeding. The genetic variability of ebony was mostly derived from the variability in population (95.4%). Grouping individual trees based on their provenances indicated that Malili provenance showed closed relationship to Maros provenance, whilst Mamuju provenance showed closed relationship to Barru and Sidrap provenances.
Instrumental Neutron Activation Analysis (INAA) of Cisadane Estuarine Sediments Lubis, Ali Arman
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (751.56 KB) | DOI: 10.31258/jnat.10.1.58-65

Abstract

Nuclear analytical technique instrumental neutron activation analysis was employed for the multielemental analysis of sediments collected from Cisadane estuary. This analytical technique provides concentration of 20 elementswhich consist of heavy metals and rare earth elements simultaneously. Two sediments cores were collected using core sampler for determining the distribution of all elements in the depth profiles of sediments. Sediment cores were subdivided into 2 cm increment, dried and sent to reactor for irradiation using thermal flux of ?1013 neutrons.cm-2.s-1 for 20 minutes in Research Reactor Siwabessy, National Nuclear Energy Agency (BATAN), Serpong. Irradiated samples were measured using a multichannel analyzer (MCA) gamma spectrometer coupled with high purity germanium detector. Analysis of particle size was done since uptake of heavy metals by sediments is particle-size dependent. The results are presented and discussed.
Struktur Floristik Hutan di Kawasan Lindung Sempadan Sungai dalam Areal Hutan Tanaman Industri Qomar, Nurul; Bahdarsyah, Bahdarsyah; Nugroho, P Agung; Rohaini, Rahmi A; Muhammad, Ahmad
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.10.1.24-30

Abstract

This study was carried out in riparian conservation forests within a monospecific pulpwood estate in Sorek,Pelalawan District, Riau. The remaining natural forests comprised lowland rainforest (at Sei Buluh and Tolamriversides), mixed swamp forest (at Telayap riverside), and pole forest (at Rangsang riverside). The objective of thecurrent study was to describe the floristic structure of each forest type at the conservation areas in concern.Fifteen transects (width of 20 m) were established at all sites with a total length of 8.080 m. Quadrates plots of 20x 20 m were established with continue on these transect for tree sampling (dbh > 20 cm) and smaller quadrates(10 x 10 m) were nested on each one of the former for pole sampling (dbh 10 – 20 cm). The parameters used in thisstudy were Importance Value (IV), species richness (Margalef Index = R1 and Menhinick Index = R2), and Diversity Index (Shannon = H’ and Simpson = D). Results showed that in tree stratum, the largest basal area (11.25 m2ha-1) and the highest diversity was found at Telayap’s riverside (H’ = 3.70 and D = 0.98). Species richness was most profound at Tolam riverside (R1 = 10.43 and R2 = 2.83). Rangsang’s riverside possessed the highest tree density (105 individuals ha-1) but with the smallest dbh (26.5 cm). This forest was a peat-swamp forest predominating by bintangur (Calophyllum pulcherimum). At the pole stratum, the largest basal area (7.00 m2ha-1) and the highest diversity was found at Tolam riverside (H’ = 3.39 and D = 0.96). Species richness was most profound at Telayap’s riverside (R1 = 8.89 and R2 = 2.64). The highest pole density (380 individuals ha-1) was observed at Sei Buluh’s riverside, in which mempening (Quercus lucida Roxb.) was predominating. Acacia mangium was establishing very well at all sites, indicating its adaptability and potentially invasive feature.
Isolasi dan Aktivitas Antibakteri Aktinomisetes Asal Tanah Gambut Riau Linda, Tetty Marta; Roza, Rodesia Mustika; Yuliati, Rola; Wahyuliyanti, Wahyuliyanti
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (179.074 KB) | DOI: 10.31258/jnat.10.1.18-23

Abstract

The aims of this study are to isolate actinomycetes from peat soil samples, to determine the ability of actinomycetes to inhibit the growth of Gram positive bacteria (Bacillus subtilis and Staphylococcus aureus) and Gram negativebacteria (Escherichia coli and Pseudomonas sp.). A total of 14 actinomycetes strains were recovered from peat soil samples using pour plate method with Starch Casein Agar. The results showed that 11 isolates were active against B. subtilis, 8 isolates against S. aureus, 8 isolates were active against E. coli and 8 isolates againstPseudomonas sp. Two isolates (SM 1.3 and SM 1.6) were active against all bacterial targets.
Studi Sintesis Analog Piokelin III: Sintesis Asam 3-Asetil-2-(2-(2-Hidroksifenil)- 4,5-Dihidrotiazol-4-Il)Tiazolidine-4-Karboksilat Zamri, Adel
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (191.292 KB) | DOI: 10.31258/jnat.10.1.49-52

Abstract

The total syntheses of 3-acetyl-2-(2-(2-hydroxyphenyl)-4,5-dihydrothiazole-4-yl) thiazolidine-4-carboxylic acid, a new pyochelin analog is described. The molecule intermediate 4’-(2-hydroxy-phenyl)-2,3,4,5,2’,5,-hexahydro- [2,2’]bithiazolil-4-carboxylic acid was obtained in 4 steps reaction from 2-hydroxybenzonitrile in good yields. The Nacetylation of molecule intermediate was carried out by acetic anhydride to produce pyochelin analog in moderate yields.
Karakterisasi Molekuler Bakteri Probiotik Ikan Kerapu Bebek Berbasis Teknik 16S Ribosomal DNA Feliatra, Feliatra; Andrito, Wahyudi
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (95.052 KB) | DOI: 10.31258/jnat.10.1.13-17

Abstract

The aim of research was to find the molecular characteristics of probiotic bacteria in the digestive tract of grouper fish (Chromileptes altivelis) based on 16S ribosomal DNA technique. The bacteria were isolated from stomach and intestine of the fish and were analized in the Marine Microbiology Laboratory of fishery and marine Science Faculty of Riau University. The bacterial DNA were isolated by using a PCR (polymerase Chain Reaction) and was conducted in the biotechnology laboratory of Diponegoro University, Semarang. The purified DNA was sequenced in the BPPTTangerang. Result shown that 6 bacterial species may be potential as probiotic. There were Bacillus velesensis strain CR-11, Vibio alginolyticus A3G-2, Bacillus cereus site2S, uncultured bacterium clone BB3S16S-17, Bacillus subtillus strain CICC10066, and Bacillus flexus strain LF-3. these bacteria grow well at pH 2 and this indicated one of probiotic bacteria characteristics.
Pemulihan Kerusakan Jaringan Hati Mencit yang Diberi Ekstrak Butanol Buah Tua Mahkota Dewa Soeksmanto, Arif
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (258.312 KB) | DOI: 10.31258/jnat.10.1.53-57

Abstract

Mahkota dewa (Phaleria macrocarpa [Scheff.] Boerl.) is an Indonesians traditional medicinal plant used to treat various diseases, such as diabetes mellitus, hemorrhoid, impotency and cancer. Almost all parts of the plants canbe used as traditional medicine, but if directly consumed, it can cause swollen, sprue, numb at tongue, fever, even unconsciousness. This research was carried out to find out recovery of liver tissue damage of mice administered intraperitoneally with subchronic dosage of butanol extract 170 mg/kg body weight. Observation on first week showed that there is light degeneration (vacuolization) which is getting better on second week and apparentlynormal on forth week.
Kajian Penanda Genetik Gen Sitokrom b DNA Mitokondria Ikan Lais dari Sungai Kampar Riau Elvyra, Roza; Solihin, Dedy Duryadi
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (177.49 KB) | DOI: 10.31258/jnat.10.1.6-12

Abstract

The mitochondrial cytochrome b (cyt-b) gene as a phylogenetic marker of lais fish Kryptopterus schilbeides from Kampar River in Riau has been studied. This is a prelimininary research on the utility of cyt-b gene as a molecular marker to obtain species diversity and phylogenetic relationship among Kryptopterus fishes from Kampar River. The primers of L14841 and H15149 were used to amplify the cyt-b gene. The results showed that K. schilbeides has isoleusine at site-81 and metionine at site-114; K. schilbeides from Kampar River and K. schilbeides from GenBank form a phylogeny cluster at 45% value.
Aktivitas Antimalaria Daun Erythrina variegata Herlina, Tati; Supratman, Unang; Subarnas, Anas; Sutardjo, Supriyatna; Abdullah, Noor Rain
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.10.1.36-41

Abstract

The leaves of Erythrina variegata (Leguminosae) used tradisional plant of an antimalarial. In the course of our continuing search for novel an antimalarial compound from Erythrina plants, the methanol extract of the leaves ofE. variegata showed significant antimalarial activity in vitro toward Plasmodium falciparum in vitro using the lactate dehydrogenase (LDH) method. The methanol extract of the leaves of E. variegata showed against bothstrains of parasite with IC50of 6.8 ?g/ml against K1 and > 60 ?g/ml against 3D7, respectively. The methanol extract of the leaves of E. variegata was separated by using bioassay-guide fractionation. The n-buthanol fraction yieldedthe most activity, exhibiting equipotency against both strains of parasite with IC50of 5.1 ?g/ml against K1 and 13.5 ?g/ml against 3D7, respectively. Furthermore, by using the antimalarial activity to follow separation, the n-buthanol fraction was separated by combination of column chromatography to yield an active compound. The active compound showed antimalarial activity against both strains of parasite used with IC50 of 4.3 ?g/ml against K1 and 23.5 ?g/ml against 3D7, respectively. Its inhibition of the resistant strain (K1) was also much better compared to its inhibition of the sensitive strain (3D7), indicated that the leaves of E. variegata to be potential as antimalarial agents, but its lower potency compared to artemisinin and chloroquin.

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