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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (94.458 KB) | DOI: 10.31258/jnat.13.2.138-145

Abstract

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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (47.103 KB) | DOI: 10.31258/jnat.13.2.130-133

Abstract

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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (101.512 KB) | DOI: 10.31258/jnat.13.2.112-117

Abstract

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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (62.626 KB) | DOI: 10.31258/jnat.13.2.89-93

Abstract

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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (54.595 KB) | DOI: 10.31258/jnat.13.2.134-137

Abstract

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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (126.257 KB) | DOI: 10.31258/jnat.13.2.105-111

Abstract

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.
Efek Penambahan Aditif Golongan Karboksilat dalam Menghambat Laju Pembentukan Endapan Kalsium Sulfat Suharso, Suharso; Buhani, Buhani
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (72.805 KB) | DOI: 10.31258/jnat.13.2.100-104

Abstract

Scale formation is a serious problem encountered in many industries including oil or gas production, watertransport, power generation and batch precipitation. Several additives used have been known to inhibit scaleformation. This method is used because it is cheaper and effective in inhibiting scale formation. At this research,it was invesigated the effect of additional additive from carboxyl groups like citric acid, oxalate acid, and benzoicacid as inhibitor of kalsium sulfate (CaSO4) scale formation using conductivity method at temperature of 400C. Theresult showes that additives used are able to inhibit kalsium sulfate (CaSO4) scale formation under this condition.
Inhibisi Lipase Pankreas secara In Vitro oleh Ekstrak Air dan Etanol Daun Asam Jawa (Tamarindus indica) dan Rimpang Kunci Pepet (Kaempferiae rotundae) Pradono, Dyah Iswantini; Darusman, Latifah Kosim; Susanti, Ai
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.355 KB) | DOI: 10.31258/jnat.13.2.146-154

Abstract

Tamarind and kunci pepet has been used traditionally as herbal medicine to reduce body weight or used asantiobesity. But the mechanism in vitro of this herbal in reducing body weight has not been known yet. Theobjective of this research is to evaluate these herbal as antiobesity by their water and ethanol extracts capabilityin inhibiting pancreatic lipase activity in vitro at pH 8, incubation time 45 minutes, and temperature 400C. Pancreaticlipase used in this research was human pancreatic lipase with concentration of 1.4 × 10-5 μg/μl and the substratewas sesame oil with concentration of 16.2 μg/μl. The water and ethanol extracts of tamarind leaves containedalkaloids, flavonoids, saponins, steroids, and tannins. Water extract of kunci pepet contained alkaloids, flavonoids,saponins, and tannins, while ethanol extract contained alkaloids, flavonoids, saponins, and triterpenoids. Theresults of tamarind leaves extracts showed that ethanol extract in concentration of 150 ppm had the highestinhibitory effect, with the value of 49.0%. Water extract of kunci pepet at concentration of 200 ppm had the highestinhibition, with the value of 65.1%. These values were higher than inhibitory effect of Xenical® 100 ppm as thepositive control, with the inhibition value of 10.6%.
Medium Term Conservation of Several Carnation Accessions Via in Vitro Culture Budiarto, Kurniawan; Marwoto, Budi
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (49.629 KB) | DOI: 10.31258/jnat.13.2.174-177

Abstract

Sufficient genetic diversity is important in carnation breeding program. In vivo conservation of carnation germplasmis considered inefficient due to some technical and economical aspects. In vitro conservation was then, expectedto overcome the limitation of in vivo method. The research was conducted to find out the proper media for medium-term in vitro conservation of several carnation accessions in low temperature storage. A complete factorialexperiment with 25 replications was designed to accomplish the combination of two factors. The first factor wassix commercial carnation cultivars, namely Pink Maladi, Orange Triumph, Opera, Tundra, Yellow Liberty and PradoReffit. The second factor was the conservation media i.e. 1⁄2MS + DMSO 3% and 1⁄2MS + 3% DMSO + 3% sucrose andcontrol (MS 0+3% sucrose). The results showed that in vitro conservation of carnation in low temperature weresuccessfully conducted using 1⁄2MS+3% DMSO and 1⁄2MS+3% DMSO+3% sucrose without significant variation in allaccessions tested up to 10 and 12 months respectively. The increase of death plantlets, however, was detected onthe media of 1⁄2MS+3% DMSO after 6 months storage with significant decrease in viability hereafter. The existenceof sucrose in DMSO media induced root formation and plantlet resistance to low temperature storage.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (85.93 KB) | DOI: 10.31258/jnat.13.2.123-129

Abstract

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.

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