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Irwan Effendi
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INDONESIA
Jurnal Natur Indonesia
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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Seaweed Diversity at Muluk Beach, Sengkol Village, Pujut Sub-District, Central Lombok Regency, Nusa Tenggara Barat Nunik Cokrowati; Nur Yatin; Jayusri Jayusri; Muhammad Jum'at; Salnida Yuniarti Lumbessy; Wiyat Zahroh Sepia Utami
Jurnal Natur Indonesia Vol. 22 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.22.1.57-67

Abstract

Seaweed can produce compounds that have diverse biological activities, including antioxidants. These compounds can be used in food, food sources, and medicines. This study aimed to analyze the types of seaweed that grow wild in the waters of Muluk Beach. The research was conducted at Muluk Beach, Sengkol Village, Pujut District, Central Lombok Regency. The research methods used in this study were survey methods and laboratory experiments. The results explained that the type of wild seaweed that grows in the waters of Muluk Beach is Padina sp, Gracilaria coronopifolia, Sargassum cristaefolium, Gracilaria sp, Caulerpa taxifolia, C. taxifolia, Ulva intestinalis, Halimeda opuntia, Ulva sp, Codium, H.tuna, G.salicornia, G.verrucosa, and Acanthopora. The type with the highest antioxidant content is Padina sp, which is 81,31% and has 14,39 mg/L chlorophyll-a levels. The species with the lowest antioxidant content was H.opuntia at 1,79% and chlorophyll at 8,83 mg/L
Hydro-Oceanographic Dynamics in the Rupat Utara Coastal Area Ilham Ilahi; Mubarak Mubarak; Maellynia Mustofa; Novia M. Afianti
Jurnal Natur Indonesia Vol. 22 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.22.1.68-75

Abstract

Coastal areas are one of the areas that have very potential both functionally and economically as a source of life for the surrounding community. However, if the management of coastal resources does not have sustainability, various problems will arise. Rupat Island is one of the water areas that is a crossing path between countries. Sustainable management of coastal areas must follow planning, utilization, supervision, and control of the impact that will be caused both by humans in utilizing it and the effect of oceanographic phenomena on coastal areas, such as hydro-oceanographic factors. This research aims to analyze the characteristics and factors that cause coastal environmental degradation, as well as the ecological carrying capacity of coastal areas in terms of physical aspects of oceanography. The method used in this research is a survey method, which involves interviews and questionnaires analyzed qualitatively and quantitatively. Data collection was done using a purposive sampling method based on affordability. The resulting bathymetric contours indicate that the waters in the middle of the Malacca Strait have a high depth (40 m) with more inland areas (approaching Rupat Island), and the sea depth decreases. The tides shown are field and secondary tides obtained through the prediction of tidal data by NAOTide software. The results of the graph displayed are very appropriate, which shows that the tidal type of Rupat Utara is a mixed tide inclined to double daily (Mixed Tide Prevailling Semi-diurnal). Current patterns from low to high tide have the same direction, from the northeast towards the southeast, with the highest current velocity occurring in February and the current velocity value above 0.5 m/s. While at high tide towards low tide, the current pattern has the opposite direction, namely from the southeast to the northeast, with the highest current speed occurring in December and above 0.8 m/s. The IKP calculation of the entire research area of Tanjung Punak Village is the area with the highest vulnerability level value, with a GPA value of 1215, and the lowest vulnerability level value in Tanjung Medang Village, with a GPA value of 216. The phenomenon of coastal area damage in the Rupat Utara area is almost found in every observation location, which is caused by the impact of both hydro-oceanographic factors and anthropogenic factors
Antihyperglycemic Test of Ethanol Extract of Soursop Leaf (Annona muricata L.) on Blood Sugar Levels of Male Mouse (Mus musculus) Induced by Glucose Gusti Putu Okapanji Reza Kusuma
Jurnal Natur Indonesia Vol. 19 No. 1 (2021): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

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 M Riswan; Iesje Lukistyowati; Henni Syawal
Jurnal Natur Indonesia Vol. 19 No. 1 (2021): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

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 Ronal Kurniawan
Jurnal Natur Indonesia Vol. 19 No. 1 (2021): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

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
Review of the Characterization of Lactic Acid Bacteria in Tuna Fish Siti Malikha
Jurnal Natur Indonesia Vol. 19 No. 1 (2021): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

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
Comparative Morphometric Rhizophora ApiculataFlower and Fruit in Two Areas with Anthropogenic Activities in West Dumai Coastal, Dumai City, Riau Province Muhammad Zebi Fernando; Efriyeldi Efriyeldi; Aras Mulyadi
Jurnal Natur Indonesia Vol. 19 No. 1 (2021): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

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
Heavy Metal Content in Sediment and Hora Shell (Cerithidea obtusa) in Panipahan Waters, Rokan Hilir, Riau Indra Wariski; Yusni Ikhwan Siregar; Bintal Amin
Jurnal Natur Indonesia Vol. 19 No. 2 (2021): October
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

This research was carried out in March 2021 to analyze the heavy metal content of Pb and Cu in the sediment and flesh of the horn shell (Cerithidea obtusa). Sediment samples and horn shells were taken from the coastal waters of Panipahan, Panipahan Village, and Teluk Pulai Village, Rokan Hilir Regency, Riau Province. The method used in this research is a survey method. Sampling was determined by using purposive sampling at three different stations. The results of this study showed that the metal content of Pb and Cu was highest in sediments around residential areas (44.7150 g/g and 104.4200 g/g), while the horn shell was found in areas far from anthropogenic activities (2.4717 g/g and 8.6617 g/g). Differences in the metal content of Pb and Cu in the sediments were found between stations, while for horn shells there was no difference between stations. The metal content of Pb in the sediment did not show a significant effect (F < 0.05) Pb content in horn shells, as well as Cu. The results of the calculation of the PTWI (Provisional Tolerable Weekly Intake) value indicated that the horn shell in the waters is acceptable for consumption.
Abundance and Distribution Patterns of Gastropods in the Intertidal Bay of Kambang Lengayang Sub-District, Southern Coastal District, West Sumatera Ichwanul Harif; Afrizal Tanjung; Elizal Elizal
Jurnal Natur Indonesia Vol. 19 No. 2 (2021): October
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

This study aims to determine the abundance and distribution pattern of gastropods in the intertidal bay, Kambang Lengayang District, Pesisir Selatan Regency, West Sumatra. The benefits of this research are expected to be a reference or information for further research in Kambang Bay which in the end is expected to minimize the adverse effects of gastropod hunting. The research method used in this study is a survey method, namely direct observation and sampling which is divided into 3 stations where the sampling station 1 is taking in the coastal waters of the bay in an area where there is no community activity, station 2 is taking in the waters of the bay in the fishing trawl area. station 3 taking in the coastal waters of Kambang in the reclamation area. Based on the analysis of organic sedimentary material in the study area, the average value was obtained at station 1 (3.55%), station 2 (4.20%) and station 3 (3.33%). Based on the analysis, the sediment fraction that dominates each station is sand. The gastropods found at the study site were Clypeomorus bifasciata, Littoraria scabra and Cerithulata cingulata. The abundance of gastropods in the coastal waters of Kambang ranged from 2.33 to 5.00 Ind/m2. The results of the ANOVA test showed that the abundance of gastropods in the bay waters showed 0.214 beaches, indicating that the difference in abundance between stations was not significant. The gastropod pattern found at the study site is generally in groups
Genetic Change of Pharella acutidens Influenced by Pb and Cd Metals in Rupat Strait Waters Tri Vani Bernadetha Ginting; Syafruddin Nasution; Irwan Effendi
Jurnal Natur Indonesia Vol. 19 No. 2 (2021): October
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Rupat Strait related to the Strait of Malacca is a national and international shipping lane and makes the region affected by anthropogenic activities that result in a decrease in the quality of the waters such as the increasing amount of heavy metal content. The most easily contaminated organism of heavy metals is bivalves due to and its low mobility, bivalves being filter feeders, and the ability to accumulate contaminants,. The purpose of this study was to look at genetic changes in bivalves (P.acutidens) contaminated by heavy metals. The study was conducted from February to March 2021. Bivalve sample was collected from the waters of Rupat Strait and sample analysis was conducted in the Marine Biology Laboratory and Genetics Laboratory of Riau University. Bivalve DNA is isolated with Geneaid Tissue Genomic DNA Mini Kit. DNA isolation results were then carried out PCR process and sequencing process was carried out in PT. Genetika Science Indonesia. The results of study show that sequencing results obtained by samples derived from Selinsing have the most changes in the composition of nitrogen bases compared to samples from the other two stations

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