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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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Sugarcane-Bagasse Trichokompos Optimalization using Trichoderma sp. (LBKURCC1 and LBKURCC2) and Pseudomonas szutzeri (LBKURCC54 dan LBKURCC59) Muslimah, Nur; Pato, Usman; Saryono, Saryono
Jurnal Natur Indonesia Vol 17, No 2 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Sugarcane (Saccharum officinarum) is a plant that is widely used as raw material for making sugar and can be enjoyed directly by extracting the juice. While the pulp has not been utilized and is often disposed of as waste. This study aims to make compost using Trichoderma (LBKURCC1 and LBKURCC2) and Pseudomonas (LBKURCC54 and LBKURCC59) as bioactivators. The composting process is done by mixing bagasse and chicken manure with a ratio of 2: 1 and adding isolate fungus Trichoderma sp. and Pseudomonas stutzeri bacteria as activator with several combinations on compost media with 5 treatment. Compost treatment includes P0 (control), P1 (J1_J2_B1), P2 (J1_J2_B2), P3 (J1_B1_B2), P4 (J2_B1_B2) and P5 (J1_J2_B1), P3 (J1_J2_B1_B2). The process of composting bagasse is done in a poly bag. Analyzed of compost quality was determined based on parameters of temperature, water content and the levels of C/N ratio observed for 18 days. In this study, the use of Trichoderma (LBKURCC1 and LBKURCC2) and Pseudomonas (LBKURCC54 and LBKURCC59) as bioactivators in a mixture of compost material gave a significant difference to control at the C/N ratio with a value of P> 0.05. The highest C/N ratio is from P5 (28.43) and the lowest is from P2 (5.17).

Sintesis dan Uji Antibakteri Senyawa Bromo Kalkon Piridin Jasril, Jasril; Teruna, Hilwan Yuda; Zamri, Adel; Alfatos, Darian; Yuslinda, Elka; Nurulita, Yuana
Jurnal Natur Indonesia Vol 14, No 3 (2012)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Three pyridine chalcones including (Z)-1-(4-bromophenyl)-3-(pyridin-2-yl)prop-2-en-1-one (1), (Z)-1-(4-bromophenyl)-3- (pyridin- 3-yl)prop-2-en-1-one (2) and (Z)-1-(4-bromophenyl)-3-(pyridin-4-yl)prop-2-en-1-one (3) were synthesized by aldol condensation reactions from pyridinecarbaldehyde with 4-bromoacetophenone. In antibacterial assay, compound 3 exhibited strong activity against Staphylococcus aureus, Bacillus subtilis and Escherichia coli with the inhibition zone of 19.9; 19.5, and 17.5 mm, respectively.

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.

Sifat Fisikokimia dan Fungsional Pati Buah Aibon (Brugueira gymnorhiza L.) Sarungallo, Zita Letviany; Santoso, Budi; Tethool, Eduard Frasisco
Jurnal Natur Indonesia Vol 12, No 2 (2010)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The aim of this research was to evaluate the physicochemical and functional properties of aibon (Brugueiragymnorhiza L.) starch. Research’s results show that the form of aibon starch granule was ellips like kidney, withsize of 5-4.5 μm, has high amylose content of 32.35%, and gelatinization temperature of 85.5-95oC. It also has highsolubility (7oBrix) and swelling powered of 14.83% at 90oC. Pasting behavior of starch suspension (6.5%, w/v)shows the initial pasting temperature at 85.5oC and peak viscosity 200 BU reached at 93oC. The wide range ofgelatinization temperature makes aibon starch resistant to high heat temperature. Functional characters thatmake aibon starch important for industrial application are its non-adhesive and un-sticky paste, increasing viscositywhile it was heated, unstable gel forming, and low stability to freezing-thawing cycle. Aibon starch also haspotential usage for carbohydrate base products that need starch which has heat resistant granule but does notneed starch that has high viscosity paste.

Keanekaragaman Makrozoobenthos pada Hutan Mangrove yang Direhabilitasi di Pantai Timur Sumatera Utara ', Onrizal; Simarmata, Fernades SP; Wahyuningsih, Hesti
Jurnal Natur Indonesia Vol 11, No 2 (2009)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Macrozoobenthos is a group of important fauna in mangrove ecosystem. Mangrove rehabilitation is required toincrease biodiversity and density of fauna, including macrozoobenthos. The aim of this research was to studyinfluence of biotic and abiotic factors to diversity and abundance of macrozoobenthos. The research was conductedat natural and rehabilitated mangrove forest in Percut Sei Tuan, east coastal of North Sumatra. The results showedthat density of macrozoobenthos were significantly correlated to the soil texture, soil organic carbon and pH.Besides, macrozoobenthos diversity was mostly influenced by stand basal area, salinity and silt proportion of soiltexture.

Optimalisasi Teknik Ekstraksi dan Isolasi DNA Tanaman Suren (Toona Sureni Merr.) untuk Analisis Keragaman Genetik berdasarkan Random Amplified Polymorphic DNA (RAPD) Restu, Muh; Mukrimin, Mukrimin; Gusmiaty, Gusmiaty
Jurnal Natur Indonesia Vol 14, No 1 (2012)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The species of trees have different secondary compounds that need optimum extraction techniques. Appropriate extraction techniquesdetermine the quality and quantity of DNA produced. This research aims to found optimal of extraction methods and DNA isolation, thento created genome DNA in high quality and quantity, so that it can be using for genetic variation analyses in Suren (Toona sureni Merr.) byRandom Amplified Polymorphic DNA (RAPD). This study shows that DNA concentrates were 763.3 μg/ml, 180.0 μg/ml, 383.3 μg/ml, and436.7 μg/ml. While based on the results of PCR amplification using the primers OPD 03 shows that the four extraction methods used, the extraction method of number 3 has been able to produce genomic DNA with better quality and more number of bands, although the quantityis lower.

Pengaruh Suhu terhadap Perkembangan Pradewasa Parasitoid Eriborus argenteopilosus Cameron (Hymenoptera: Ichneumonidae) Nelly, Novri; Habazar, Trimurti; Syahni, Rahmat; Buchori, Damayanti
Jurnal Natur Indonesia Vol 13, No 3 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Temperature effect on development time of the preadult parasitoid Eriborus argenteopilosus Cameron(Hymenoptera: Ichneumonidae) were studied to know development time, degree days and survival rate.Crocidolomia pavonana (Fabricius)(Lepidoptera: Pyralidae) larvae was exposed to E. argenteopilosus female andreared at four different temperatures i.e 160C, 200C, 250C and 300C. Data were analyzed using anova and linearregression to calculate degree day. At 200C E. argenteopilosus showed the highest degree day and survival rate(18.67 %), while at 300C nothing adult parasitoid emergenced. Degree day to development time of parasitoid attemperature 200C i.e fase egg-adult: 300.05; egg-pupae 173.35; pupae-adult 171.

Penumbuhan Lapisan Tipis Cooper Phthalocyanine (CuPc) Sebagai Bahan Dasar Sel Surya Organik Nurosyid, Fahru; Kusumandari, Kusumandari
Jurnal Natur Indonesia Vol 12, No 2 (2010)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Have been conducted a thin film plant of CuPc (Copper Phthalocyanine) and CuPc/Ag (Copper Phthalocyanine/Argentum) at substrat ITO (Indium Tin Oxide) with evaporation method. Coat plant attenuate this use variation ofmass that equal to 50 mg, 100 mg, and 150 mg, with current deposition equal to 40 Ampere. Characterization ofCuPc thin film use Scanning Electron Microscopy (SEM) to know the thickness of the thin film, UV - VisibleSpectrophotometer to know absorbance value of CuPc thin film at wavelength of visible light, and measurement ofvoltage current by two point probe method to know the voltage current characteristics from the thin film in the darksituation and under illumination situation. From result of SEM characterization show the thickness valueprogressively along increase of CuPc materials mass. For the each deposition mass obtained thickness value(0,46 ± 0,01) until (0,92 ± 0,02) μm. UV - Visible Spectrophotometer characterization show light absorption by CuPcthin film layer in visible light, absorption happened at wavelength range 520 nm until 780 nm. From the current -voltage measurement at dark and under illumination situation obtained a current value progressively increasealong its mass increase, but decrease from illuminated to darkness.

Pemarasitan Benalu Dendrophthoe pentandra (L.) Miq. pada Tanaman Koleksi Kebun Raya Cibodas, Jawa Barat Sunaryo, Sunaryo
Jurnal Natur Indonesia Vol 11, No 1 (2008)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The mistletoes of Dendrophthoe pentandra (Loranthaceae) grow as parasite on several plant collections of CibodasBotanical Gardens. Plant collections which attacked by mistletoe are Ficus type (Moraceae), and by individual innumber at most is Syzygium racemosum (Myrtaceae). 299 infected and uninfected branches of 67 host specieswere observed. The results showed that the host branches can be destroyed by mistletoe. Moreover, in the naturalconditions, the mistletoe causes degraded of the distal part of the infected branches.

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

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.

Page 19 of 31 | Total Record : 306

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Irwan Effendi

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natur@ejournal.unri.ac.id

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+62811764031

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kurniawanronal09@gmail.com

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

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Riau

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

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

Abstract

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Abstract

Abstract

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Abstract

Abstract

Abstract

Abstract

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