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Jurnal Natur Indonesia

JN
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Published by Universitas Riau

ISSN : 14109379 EISSN : 25030345 DOI : https://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 published since 1998, is a science journal that presents articles on research results, thoughts and views from researchers and experts in the field of biosciences (basic science), including biology, physics, chemistry and mathematics. In the field of biosciences (basic science); Biology, Physics, Chemistry, Mathematics.

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

Articles 306 Documents

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Hidrolisis Pati Ganyong (Canna edulis) dengan Amilase Bakteri Flavobacterium sp. PTBT I untuk Produksi Bioetanol Ningsih, Dian Riana; Zusfahair, Zusfahair; Fatoni, Amin
Jurnal Natur Indonesia Vol 15, No 2 (2013)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Bioethanol is an alternative energy of fuels produced from vegetable materials. Vegetable materials that can be used as rawmaterial for bioethanol is ganyong because it contains 22.60 g starch in 100 g ganyong. The production of bioethanol fromstarch material consisted of two steps, hydrolysis and fermentation. One of the steps to increase the value of bioethanolfrom starch of ganyong was hydrolysis process using thermostable amylase enzyme isolated from Flavoacterium sp.PTBT I bacteria was isolated from hot spring of Pancuran Tujuh Baturraden. The aim of this research was to use thermostableamylase to hydrolyze starch of ganyong and glucose produced to result bioethanol. The result of this research showed thatthe optimum condition hydrolysis starch of ganyong was using thermostable amylase acquired at substrate concentrationof 3% (b/v), and incubation time of about 75 minutes. The value of bioethanol increased with time of fermentation, from thefirst to fourth day, which was 0.8361; 2.2379; 5.7590 and 10.5787% (v/v), respectively.

Pengaruh Pemberian Senyawa Taurin dan Ekstrak Daun Dewa Gynura segetum (Lour) Merr terhadap Eritrosit dan Leukosit Mencit (Mus musculus) yang Diinduksi Benzo[α]Piren Marlinda, Henny; Linirin Widiastuti, Endang; Susanto, G. Nugroho; ', Sutyarso
Jurnal Natur Indonesia Vol 17, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Blood cancer (leukemia) is a cancer that occurs due to malignancy of blood cells. Treatment of leukemia generally causes damage to normal cells. Therefore, it needs a drug that has the effect of repairing cell damage and the ability to boost immunity of normal such as taurine and Gynura leaves which are expected to have anticancer and antioxidant properties. The purpose of this study was to investigate the effect of taurine and dewa leaf extract on blood tissues induced by benzo [α] pyrene in vivo, by looking at changes in body weight, the number of red blood cells (erythrocytes), the total number and differentiation of white blood cells (leukocytes) in mice (Mus musculus). Data were analyzed by One Way ANOVA test followed by LSD at 5% significance level. The treatment groups were the group I was given 0.2 mL of corn oil (negative control), group II (given benzo [α] pyrene as a positive control, Group III (given taurine 7.8 mg/BW/day starting from day 1 to 15 before the induction of benzo [α] pyrene until the end of the study), Group IV was given benzo [α] pyrene, then were given taurine 7.8 mg/BW/day were given 2 times a day, as well as the V group was given benzo [α] pyrene, then given a dose of Gynura leaf extract 277.8 mg /BW/day. The results showed taurine and Gynura leaf extract were able to obstruct leukemia by increasing body weight, erythrocyte, leukocyte, and the number of leukocyte differentiation which becomes normal again. In conclusion taurine has better ability for therapoitic than Gynura leaf extact against blood cells induced by benzo[α]piren

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 %.

Sintesis dan Aplikasi Karboksimetil Kitosan sebagai Inhibitor Korosi pada Baja Karbon dalam Air Erna, Maria; Emriadi, Emriadi; Alif, Admin; Arief, Syukri; Noordin, Mohd Jain
Jurnal Natur Indonesia Vol 12, No 1 (2009)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Carboxymethyl chitosan (CMC) was synthesized with different methods by reacting chitosan with monochloroaceticacid in the presence of sodium hydroxide under variation conditions. The above samples were characterized byFourier transform infrared spectroscopy (FTIR) and soluble in water in range of pH. The CMc were soluble in watera wide range of pH and applied as corrosion inhibitor for steel in water. The inhibiting influence of CMC was studiedby potentiodynamic polarization method. It was found thad corrosion rate was dependent on water pH and CMCconcentration. The results show that optimum the inhibition efficiency at pH 5 and 1 ppm concentration CMC, i.e.,77%. The adsorption of used compound on the steel surface obeys modified Langmuir isotherm. Polarizationmeasurement show that the CMC acts essentially as a anodic-type inhibitor.

Asimtotik Model Multivariate Adaptive Regression Spline Otok, Bambang Widjanarko; Guritno, Suryo; Subanar, Subanar
Jurnal Natur Indonesia Vol 10, No 2 (2008)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Parameter estimation in MARS model executed by minimizing penalized least-squarer (PLS). Through somerequirement, asymtotic estimator characteristic from MARS prediction model has been successfully proven. Theresearch result shows that GCV can work properly to determine the best model that applied on MARS model. Solar’s vehicles produce opacity that exceed the standard limit of emition quality which was adjusted in Kepmen LH No.35 Year 1993, as large as 88 percent from 408 percent. Applying years, cylinder volume, type of machine, andvehicle’s radius are the variables that influences the opacity.

Densitas Simbion Alga Zooxanthellae pada Anemon Laut Stichodactyla gigantea Alam dan Hasil Reproduksi Aseksual Rifaâ€™i, M. Ahsin; Tuwo, Ambo; Budimawan, Budimawan; Niartiningsih, Andi
Jurnal Natur Indonesia Vol 15, No 1 (2013)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The aims of this research were to discover the density of algae symbiont of zooxanthellae in the giant carpet anemone (Stichodactyla gigantea) from the nature and the asexual reproduction by longitudinal body fragmentation technique. The research was conducted from October 2007 to July 2008, in The Hatchery of University of Hasanuddin Marine Station in Barrang Lompo Island for seed production and coral reefs area of Barrang Lompo Island for the implementation of culture. The series of study was started with parental collection and acclimatization of anemones, fragmentation of the body, culturing anemones in the coral reefs area and collection of algae zooxanthellae which is conducted every two months. The results of this study indicated the difference of zooxanthellae density from nature and asexual reproduction anemones. The highest density of zooxanthellae algae found in the non fragmented or nature population (AA) (10.84 x 106 cell/cm2), followed by the anemone which was resulted from 2 parts body fragmentation (AF2) (10.24 x 106 cells/cm2), and the anemone which was resulted from 4 parts body fragmentation (AF4) (9.17 x 106 cell/cm2 ). Whereas, between the good coral (KB) and bad coral (KR) not significant.

Distribusi dan Kemelimpahan Spesies Tumbuhan Bawah pada Naungan Pinus mercusii,Acacia auriculiformis danEucalyptus alba di Hutan Gama Giri Mandiri, Yogyakarta Nahdi, Maizer Said; Darsikin, Darsikin
Jurnal Natur Indonesia Vol 16, No 1 (2014)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The purpose of this research was to study distribution and abundance of (shrubs, herbs, and rumput) under the three stands,i.e. Pinus mercusii, Acacia auriculiformis and Eucalyptus alba and environmental factors influencing them in Gama Girimandiri Forest. Data were collected in April-May 2011, using square plots. Plots were located in three locations by followinga stratified random sampling method. We administered 10 repetitions, and plot size 5x5 m for shrubs and herbs, and 1X1 m forgrass. The species found in each stand were identified and calculated for their density, frequency, domination, importantvalue, diversity index, and those parameters’ correlation with the measured environmental factors. The study shows that 59species of herbs and shrubs, and 12 species of grass. In the three stands, it could be shown various domination of grass,meanwhile there is no dominant species at the level of herbs and shrubs. The highest density, measured by diversity index,was observed at the stand of Pinus (3,13), followed by Acacia (3,12) and Eucalyptus (2,8). The distribution and density ofMemecylon sp and Oplismenus burmanni were observed at their highest value under the stand of Pinus, Lantana camaraLinn (37.2). At the same fashion, Paspalum conjugatum (58.3) does under the stand of Acacia, and Desmodium triflorum(64,2) and Ischaemum magnum (122) under Eucalyptus. Lantana camara could always be found under the three stands, ithad high important value, categorized as strategy species and invasive. Light density and pH significantly influenced thediversity index of shrubs and herbs. In addition, only soil temperature gave an effect to grass.

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.

Matriks atas Aljabar Max-Plus Interval Rudhito, Marcellinus Andy; Wahyuni, Sri; Suparwanto, Ari; Susilo, Frans
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

This paper aims to discuss the matrix algebra over interval max-plus algebra (interval matrix) and a method tosimplify the computation of the operation of them. This matrix algebra is an extension of matrix algebra over max-plus algebra and can be used to discuss the matrix algebra over fuzzy number max-plus algebra via its alpha-cut.The finding shows that the set of all interval matrices together with the max-plus scalar multiplication operationand max-plus addition is a semimodule. The set of all square matrices over max-plus algebra together with aninterval of max-plus addition operation and max-plus multiplication operation is a semiring idempotent. As reasoningfor the interval matrix operations can be performed through the corresponding matrix interval, because thatsemimodule set of all interval matrices is isomorphic with semimodule the set of corresponding interval matrix,and the semiring set of all square interval matrices is isomorphic with semiring the set of the correspondingsquare interval matrix.

Aktivitas Antibakteri Senyawa Turunan Oleanan dari Kayu Akar Pterospermum Subpeltatum Salempa, Pince; Noor, Alfian; Hariani, Nunuk; Harlim, Tjodi
Jurnal Natur Indonesia Vol 13, No 1 (2010)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

A triterpenoid derivative compound, oleane-12-en-2,3,23-triol-28-oat, from chloroform fraction of root wood ofPterospermum subpeltatum C. B. Rob (Sterculiaceae) was identified using IR, 1H dan 13C NMR data. The compoundhas shown toxicity against Artemia salina, LC50 of 46.06 μg/mL, and antibacterial potential upon Shigella boydii andStaphylococcus aureus with inhibition zones of 8.3 and 9.8 mm respectively.

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Home Page

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Contact Name Irwan Effendi

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Editorial Address Kampus Bina Widya KM. 12,5 Simpang Baru, Tampan, Pekanbaru 28293 Indonesia

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Abstract

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Contact Name
Irwan Effendi

Contact Email
natur@ejournal.unri.ac.id

Phone
+62811764031

Journal Mail Official
kurniawanronal09@gmail.com

Editorial Address
Kampus Bina Widya KM. 12,5 Simpang Baru, Tampan, Pekanbaru 28293 Indonesia

Location
Kota pekanbaru,

Riau

INDONESIA