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INDONESIA
Jurnal Natur Indonesia
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 5 Documents
 1 
Search results for , issue "Vol 19, No 1 (2021): April 2021" : 5 Documents clear
Comparative Morphometric Rhizophora ApiculataFlower and Fruit in Two Areas with Anthropogenic Activities in West Dumai Coastal, Dumai City, Riau Province Fernando, Muhammad Zebi; Efriyeldi, Efriyeldi; Mulyadi, Aras
Jurnal Natur Indonesia Vol 19, No 1 (2021): April 2021
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.19.1.23-28

Abstract

Morphometrics is a field that deals with variations and changes in the form (size and shape) of an organism or object. Anthropogenic is a human activity not only limited to the use or utilization of coastal resources, but also can be restorative and protective, thus causing complex disruption. The purpose of this study was to determine the morphometric differences of the flowers and fruits of R.apiculata mangroves in two regions with different anthropogenic activities in the mangrove ecosystem of Dumai City. This research was carried out in September 2019. From the results of the study it was found that in areas polluted by anthropogenic activity the average morphometrics of fruit (length and width) and leaves (length, width and length of the stems) Rhizophora apiculata were lower than those in the area not polluted by anthropogenic activity. At station I the oil content ranged from 0,0975 to 0,1251 ppm classified as polluted and at station II ranged from 0,072 to 0,111 ppm classified as not polluted.
Review of the Characterization of Lactic Acid Bacteria in Tuna Fish Malikha, Siti
Jurnal Natur Indonesia Vol 19, No 1 (2021): April 2021
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.19.1.18-22

Abstract

Bekasam is a type of fermented freshwater fish product with sour taste. Bekasam is made from fish that have been cleaned gills and entrails, washed, mixed with salt. After 2 days of fermentation, rice is added to this mixture and fermentation is continued for 5 to 7 days. Bekasam is thought to have antihypertensive activity due to the formation of bioactive peptides resulting from fish protein degradation during the fermentation process of the scars. This study aims to isolate indigenous lactic acid bacteria with high power. Lactic acid bacteria were isolated from tuna. Isolation was carried out using MRS agar + CaCO3 medium and screening of proteolytic lactic acid bacterial isolates was carried out using skim agar. Colonies that provide a clear zone on the skim to be identified as lactic acid bacteria. Of the 180 isolates of acid-producing bacteria that provide clear zones in the MRS to find 150 strains of lactic acid bacteria. The results of further morphological and biochemical tests indicate that these isolates are genera Lactobacillus, Pediococccus and Leuconostoc. The results of further selection were carried out on homofermentative lactic acid bacteria and had high proteolytic activity. The results of identification of isolate species using API CH50 showed that selected lactic acid bacteria were Lactobacillus plantarum, Lactobacillus pentosus, and Pediococcus pentosaceus
Antihyperglycemic Test of Ethanol Extract of Soursop Leaf (Annona muricata L.) on Blood Sugar Levels of Male Mouse (Mus musculus) Induced by Glucose Kusuma, Gusti Putu Okapanji Reza
Jurnal Natur Indonesia Vol 19, No 1 (2021): April 2021
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.19.1.1-5

Abstract

Soursop leaf (Annona muricata L.) is an herbal plant that is widely used by the public empirically because it has many properties. The sling leaf contains tannin compounds, alkaloids, as well as several other chemical compounds including annonaceous acetogenin, which can be used as a treatment. This study aims to find out if soursop leaf extract has the effect of deducting blood glucose levels in mice test animals (Mus musculus) which induced a 50% glucose solution. The study used the RAL method (complete random design) and 20 male mice were divided into 5 groups with 4 repetitions. Group P1, P2, and P3 (treatment group) administered ethanol extract of sine leaves at doses of 250, 500, and 750 mg/kg bb respectively, while k- and k+ (control group) administered CMC 0.5% and glibenclamide with oral administration. The data obtained were statistically analyzed with ANOVA (Variance analysis) one-way to find out the differences between treatment groups and continued with the BNT test (The smallest real difference) to find out meaningful differences between groups. The results showed that there were differences between the treatment group and the control group. On the 7th day of the BNT test, the treatment group with a dose of 750 mg/kg bb showed significant differences between the negative Control group (CMC 0'5%), Positive control (Glibenclamide), P1 (250 mg/kg bb), and P2 (500 mg/kg bb), while on the 14th day showed no significant difference with the treatment group of 500 mg/kg bb. concluded from this study that all concentrations of ethanol extract of sling leaves could lower blood glucose levels in test animals, with the most optimal decrease being the group at a dose of 750 mg/kg bb.
Leukocytes Differentiation of Goldfish (Carassius auratus) Infected with Aeromonas hydrophila Bacteria and Post-treatment with Propolis Solution Riswan, M.; Lukistyowati, Iesje; Syawal, Henni
Jurnal Natur Indonesia Vol 19, No 1 (2021): April 2021
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.19.1.6-12

Abstract

This study aims to determine the best dose of propolis to treat Carassius auratus infected with Aeromonas hydrophila seen leucocyte differentiation from C.auratus. The method used was experimental method with Completely Randomized Design (CDR) with one factor consisting of five treatment levels and three replications. The treatment was Kn (not infected with A. hydrophila and untreated propolis), Kp (infected with A. hydrophila but not treated with propolis), and fish infected with A. hydrophila treated propolis with dose P1 (700 ppm), P2 (800 ppm), and P3 (900 ppm). Treatment is done by injection of propolis in fish infected by A. hydrophila in intramuscular. The fish used are 8-10 cm in size and kept for 14 days post-infection. The results showed that propolis solution has been able to treat C. auratus from infected A. hydrophila. The dose of propolis 800 ppm is the best dose to treat C. auratus infected A.hydrophila, seen from leukocyte differentiation (lymphocyte 80,25%, monocytes 10,09% and neutrophils 9,66%).
Antibacterial activity of Rhizophora apiculata leaf extract against Edwardsiella tarda bacteria Kurniawan, Ronal
Jurnal Natur Indonesia Vol 19, No 1 (2021): April 2021
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.19.1.13-17

Abstract

Aquaculture production is vulnerable to adverse impacts to disease and environmental conditions. One of the pathogenic bacteria that infection cultured is Edwardsiella tarda. The aim of this study was to find out the sensitivity of R.apiculata leaf extract in inhibiting the growth of E.tarda. The research method used is the experimental method, with the Kirby-Bauer disc method. The doses used were 100% (10000 ppm), 90% (9000 ppm), 80% (8000 ppm), 70% (7000 ppm), 60% (6000 ppm), 50% (5000 ppm), 40% (4000 ppm), 30% (3000 ppm), 20% (2000 ppm), 10% (1000 ppm) and control (Oxytetracycline), blank discs used were 6 mm in size. The results showed that the ethanolic extract of the leaves of R. apiculata at a dose of 1000-10000 ppm gave various inhibitory diameters ranging from 6.27-9.87 mm and presenting inhibition zone diameters in the medium category

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