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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 15 Documents

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Search results for , issue "Vol 13, No 2 (2011)" : 15 Documents clear

Efektifitas Kitosan sebagai Inhibitor Korosi pada Baja Lunak dalam Air Gambut Erna, Maria; Emriadi, Emriadi; Alif, Admin; Arief, Syukri
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

This research is intended to learn inhibition efficiency of mild steel corrosion in peat water using two type ofchitosan. First chitosan is without treatment and the second one is synthesized by ionotropic gelation method andthen is characterized by Fourier transform Infrared spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM).Diameter of chitosan porous is about 500 nm which is measured based on morphological photo using SEM withinhomogeneous porous shape and porous distribution is unsmooth . Effect of chitin and chitosan on the corrosionof mild steel in peat water is studied using weight loss method. It is found that corrosion inhibition efficiencydepends on peat water pH, inhibition technique and interaction time. The results show that inhibition efficiency ofchitosan without treatment and with treatment are 88.73% and 93.32% respectively. The inhibition is assumed tooccur via physicsorption of the chitin and chitosan molecules on the metal surface. The Langmuir adsorptionisotherm is tested for their fit to the experimental data.

Pengaruh Likopen terhadap Penurunan Aktivitas Mitogen-Activated Protein Kinase (MAPK) dan Ekspresi Endothelin-1 (ET-1) pada Kultur Huvecs yang Dipapar Leptin Fatmawati, Heni; Satuman, Satuman; Rudijanto, Ahmad; Indra, Muhammad Rasjad
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The effect of obesity on vascular function is mediated by hormon leptin. Leptin has been proved to increaseoxidative stress in endothelial cell. The previous study has proven that leptin caused the endothelial dysfunction asa step of the atherogenesis. Lycopene, an antioxidant, is presumed having the ability to block the atherogenesismechanism, which is stimulated a proinflamatory cytokine and adhesion molecules by MAPK and transcriptionfactor ET-1. Therefore, the aim of this research was to prove and to determine whether lycopene could decreasethe MAPK and ET-1 expression in Human Umbillical Vein Endothelial Cells (HUVECs) culture induced by 500 ng/mlleptin. In vitro study used primary culture of the HUVECs were devided in to 7 groups, there were (1) 0 ng/ml leptinand 0 ìM lycopene, (2) induced by 500 ng/ml leptin for 12 hours, (3) induced by leptin and lycopene with concentration10; 25; 40; 55 and 75 ìM for 12 hours. Then the identification of MAPK was applied by using imunocytochemistrycompared with ELISA procedure on cell endothel culture lysate and ET-1 expression was measured by using RTPCR. It was showed that lycopene 10-25 ìM decreased MAPK and ET-1 expression significantly in HUVECs cultureinduced by leptin 500 ng/ml. Leptin was increased ERK1/2 MAPK and ET-1 expression in HUVECs culture and candecrease by lycopene. Optimum dose of lycopene is 10-25 ìM.

Senyawa Antimalaria dari Jamur Endofitik Tumbuhan Sambiloto (Andographis paniculata Nees) Elfita, Elfita; Muharni, Muharni; Munawar, Munawar; Salni, Salni; Oktasari, Ade
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Plants have been the chief source of compounds of medicine for thousand of years. Plants are also the source ofmany medicines for the majority of the world’s population. The role of biotechnology is very important for multiplying,conserving the spesies, and enhancing the production of secondary metabolites. Endophytic are microbes thatinhabit plants are currently considered to be a wellspring of novel secondary metabolites offering the potensial formedical and industrial exploitation. Plants with ethnobotanical history, for example sambiloto (Andographispaniculata Nees) are likely candidates for finding bioactive compounds. Isolation begin with cultivation of Aspergillusflavus fungi in 2 liter of Potato Dextrose Broth media for four weeks. Media is extracted into the solvent n-hexaneand ethylacetate following by evaporation. Ethylacetate extracts were separated by chromatography techniquesin order to get pure compound in the form of white crystal. Phytochemical tests showed that the isolated compoundis alkaloid. The molecular structure of the isolated compound was determined based on spectroscopic data,including UV, IR, 1H-NMR, 13C-NMR, HMQC, and HMBC spectrum. The compound was determined as7-hydroxypiranopiridin-4-on with molecule formula C8H7NO2 (Mr=149). The compound has antimalarial activityagainst Plasmodium falciparum 3D7, with IC50 values 0,201 μM.

Analisis Besi dalam Ekosistem Lamun dan Hubungannya dengan Sifat Fisikokimia Perairan Pantai Kabupaten Donggala Tahril, Tahril; Taba, Paulina; Nafie, Nursiah La; Noor, Alfian
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The objectives of the study are to describe the iron content of seagrass area ecosystem and its relation with nature of physico-chemical territorial water. The sampling of seagrass was conducted in purposive sampling technique for every status of the field and performed in three spots of the seagrass ecosystem region with reference to the depth of water and the current direction. Based on statistical tests of factorial and variance analysis indicate that the quality of physico-chemical territorial water in the coastal region of Donggala regency still very good, relatively. The result also showed, The Demand Oxygen and the turbidity gave a positive effect to Fe- seagrass improvement in its various association. Besides, the limiting factor for the low of Fe-seagrass is the height of salinity and water temperature. If the results were combined with another micro and macro mineral analysis will to become the basic for estimating the status of seagrass fertility.

Isolasi Karakterisasi dan Penentuan Kadar Laktalbumin Susu Sapi Fries Holdstein dengan Metode Lowry Copriady, Jimmi; Azmi, Johni; Maharani, Maharani
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Lactalbumin is a major protein found in milk which has great function to human body. It is a component of wheyprotein in milk. Lactalbumin was isolated from cow’s milk of Fries Holdstein breed by centrifugation at high speed9500 rpm and gel filtration chromatography using sephadex G-50 produced Lactalbumin dissolved in Tris buffersolvent. Characterization of Lactalbumin by measuring the UV absorbance spectrum at 240 – 320 nm comparedwith the spectrum of standard Lactalbumin showed maximum peak at the same wavelength, 280 nm. Lactalbumincontent in milk determined by Lowry method was about 0,66 mg/ml in milk or 9,2% of whey.

Kongruensi Unsur Idempoten Ortogonal dalam Aljabar Insidensi Finitary Carnia, Ema; Wahyuni, Sri; Irawati, Irawati; Setiadji, Setiadji
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Let X be a partially ordered set, R is a commutative ring with identity and FININC (X, R) denote finitary incidencealgebra of poset X over R. In this paper it will be seen congruence of two elements that are idempotent orthogonalin FININC (X, R) relative to the modulo Radical Jacobson of algebra. Review of this topic would be useful to examineisomorphism problems of the finitary incidence Algebra.

Biodisel dari Minyak Nyamplung (Callophyllum inophyllum) dan Spiritus dengan Katalisator Kapur Tohor Marnoto, Tjukup; Sulistyawati, Endang
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Production of biodiesel has been done by many institutions; however the materials used are usually competedwith food such as palm oil, therefore it has lesser economical value. The use of Callophyllum inophyllum plant inIndonesia is very limited and the seeds are usually thrown away the contain high oil relatively. This plant is relativelyeasy to grow and has seasonal fruiting mostly planted as shading plant in rural area and also as land slide resistingplant. The plant is normally utilized for light construction and burning wood. The technology for producing biodieselis simple and can be easily introduced to the society. Biodiesel produced from easily obtained and low costmaterials will improve a society’s energy independency and well-being. This paper presents the process of producingbiodiesel from Callophyllum inophyllum oil and rubbing alcohol using superficial lime (CaO) as the solid catalystthat is cheap and easily obtained, therefore this technology can be easily transferred to the society and willimprove the economical value of the plant. Referring to the varieties used, relatively good condition was at 1:3 molratio of Callophyllum inophyllum oil to rubbing alcohol and the amount of catalyst used was 0.3-0.5% of the rubbingalcohol. Physical characteristics of the produced biodisel were such as specific gravity at 60/600F was 0.870, flashpoint P.M.cc was 1950C and pour point was 40C.

Uji Efek Pelindung Hati Ekstrak Air Tanaman Kulit Lawang, Cinnamomum Cullilaban (Lauraceae), melalui Pemeriksaan MDA dan SOD Plasma Sel Darah Tikus Soeksmanto, Arif
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Industrial growth, pollution, and the change of life style cause environmental degradation. This condition enhancesthe occurrence of degenerative diseases that more difficult to conquer than infective diseases. This promotes theuse of herbs in America up to 385% in period 1990-1997, wasting 4–12 billion dollar each year. World HealthOrganization (WHO) estimates approximately 4 billion or 80% of world citizens use herbs for their health care. Kulitlawang plants are medicinal plants grown endemically in Papua and Maluku regions. The existence of the plants inMaluku islands is considered as endangered species. Information on the plants in scientific publication is relativelylimited. meanwhile Cinnamomum sp. is known having high antioxidant compound. This research aimed to find outhepatoprotector effect of kulit lawang water extract through observation of MDA and SOD of venous blood of ratintoxicated with CCl4. Dosage used was based on result of effective dosage test which showed that water extractof kulit lawang plant of 20 mg/kg bw as highest dosage that did not harm animal health. Result of hepatoprotectoreffect test showed that MDA and SOD of control were 230.12 U/ml and 1243.00 ρmol/ml, whereas water extract ofkulit lawang was 414.45 U/ml and 793.00 ρ mol/ml, á-tocopherol 416.42 U/ml and 782.33 ρmol/ml, and curcumin426.07 U/ml and 734.00 ρmol/ml. This showed that water extract of kulit lawang plant has antioxidant propertiesand potential as hepatoprotector of oxidative damage.

Efek Sumber Karbon Berbeda terhadap Produksi â-Glukan oleh Saccharomyces Cerevisiae pada Fermentor Air Lift Kusmiati, Kusmiati; Thontowi, Ahmad; Nuswantara, Sukma
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The need of â-glucan is increasing in food, medicine and cosmetic industry, because it becomes anticancer,antitumor and antiaging, increases immunosystem, and decreases cholesterol content in blood. The cell walls ofS. cerevisiae contain 80-90% polysaccharides that posses â-glucan. This research was aimed to obtain appropriatecarbon sources to increase the production of â-glucan. The carbon sources used were glucose, glucose commercial,sucrose and molases. The fermentation process was done by using air lift fermentor. The steps of fermentatonincluded regeneration of S. cerevisiae strain, preculture, fermentor preparation and running fermentor for 84hours. Sampling of S. cerevisiae culture was determined the cell growth by optical density (OD) usingspectrophotometer UV/VIS at ë 550 nm. The protein content was determined by Lowry method at ë 755 nm and thetotal glucose was measured by phenol sulphate method at ë 490 nm. The measurement result of cell growthshowed that the high intensity of S. cerevisiae in medium contain molases, but it did not show significant effectwhen compare to other carbon sources. The protein and carbohydrate contain in medium tended to decrease. Theresult of â-glucan on glucose, sucrose, glucose commercial and molases were 933,3, 1100, 1000, and966,7 mg/l. It can be concluded that sucrose and glucose commercial can replace the glucose to produce of â-glucan, because they are cheaper and easier to get. Beside that, molases can be used as an alternative carbonsource because it can produce of â-glucan as well as glucose.

Seleksi, Karakterisasi, dan Identifikasi Bakteri Penghasil Kitinase yang Diisolasi dari Gunung Bromo Jawa Timur Soeka, Yati Sudaryati; Sulistiani, Sulistiani
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Selection, characterization and identification of bacteria that can produce chitinase enzyme were isolated fromBromo Mountain, East Java. The 48 isolates were tested for capability to degrade chitine qualitatively, semiquantitatively and quantitatively. The result showed that 2 isolates, B2-4 and NA S4-1 could degrade chitin, withactivities of 4.8. 10-3 and 3.1 . 10-3 U/ml, after 1 and 2 days incubation respectively. By using molecular characterizationmethods, partial sequences of 16S rDNA and the primers 9F & 1510R were identified as Stenotrophomonas sp.

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Titania T Nugroho

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

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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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Abstract

Abstract

Abstract

Abstract

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