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Jurnal Natural

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Published by Universitas Syiah Kuala

ISSN : 14118513 EISSN : 25414062 DOI : https://doi.org/10.24815/jn

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Energy Immunology & microbiology Neuroscience Physics

Jurnal Natural (JN) aims to publish original research results and reviews on sciences and mathematics. Jurnal Natural (JN) encompasses a broad range of research topics in chemistry, pharmacy, biology, physics, mathematics, statistics, informatic and electronic.

Arjuna Subject : Matematika - Matematika (Lain-Lain)

Articles 457 Documents

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THE EFFECT OF TOMATO EXTRACT (Lycopersicon esculentum) ON THE FORMATION OF ATHEROSCLEROSIS IN WHITE RATS (Rattus norvegicus) MALE R. N. Selamet; Sugito Sugito; Dasrul Dasrul
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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The aim of this research was to find out anti-cholesterol activity intomato extract (Lycopersicon esculentum) on blood lipid profile and its potential application in the prevention of atherosclerosis in rats fed with high cholesterol diet. This research employed a complete randomized design with unidirectional pattern by using white rats (Rattus norvegicus) divided into five groups. Negative control group was fed with standard diet, while positive control groups were fed with high cholesterol (hypercholesterolemia) diet, group K were fedwith tomato extract at a dose of 10, 20, and 40 mg/kg together with high cholesterol diet. The result of this researchshowed that high cholesterol diet fed decreased simultaneously with tomato extract at a dose of 10, 20, and 40 mg /kg of rats after 60 days of treatment. Tomato extract was able prevent the formation of plaque in the coronary arteries of rats fed with hypercholesterolemia diet. Effective dose oftomatoextractused in this study was 20-40mg/kg.

Implementation of Winsorizing and random oversampling on data containing outliers and unbalanced data with the random forest classification method FAHREZAL ZUBEDI; BAGUS SARTONO; KHAIRIL ANWAR NOTODIPUTRO
Jurnal Natural Volume 22 Number 2, June 2022
Publisher : Universitas Syiah Kuala

Many researchers conduct research using the classification method, to find out the best method for predicting the class of an observation. Some of these studies explain that random forest is the best method. However, the classification of data containing outliers and unbalanced data is a complicated problem. Many researchers are also conducting research to deal with these problems. In this study, we propose a winsorizing to deal with outliers by replacing the outlier values with the upper and lower limit values obtained from the interquartile range method and random oversampling to balance the data. It is also known that cases of the Human Development Index (HDI) in regencies/cities in eastern Indonesia vary widely, so cases of HDI in these areas can be used as case studies of data containing outliers and unbalanced data. The purpose of this study was to compare the performance of the random forest before and after the data were applied to the winsorizing and random oversampling to predict HDI in districts/cities in eastern Indonesia. Classification method random forest after handling data containing outliers and unbalanced data has better performance in terms of accuracy and kappa values, which are 96.43% and 93.41%, respectively. The variables of expenditure per capita and the mean years of schooling are the most important.

BIOACTIVE COMPOUNDS OF SPONGE FOR AQUACULTURE AND POTENTIAL METHODS FOR SPONGE CULTIVATION Ruzkiah Asaf; Andi Nur Samsi; Admi Athirah; Mudian Paena
Jurnal Natural Volume 18, Number 3, October 2018
Publisher : Universitas Syiah Kuala

Aquaculture is an important sector for Indonesian economic, however, the spreads of diseases during farming remains a problem in developing Indonesian aquaculture. The sponge is known as the source of potential bioactive to combat pathogenic diseases in aquaculture. However, the intensifying exploitation of wild sponge tends to the depreses population of sponges in nature. This article reviews bioactive originating from sponges and potential methods in developing sponges cultivations under in-situ and ex-situ methodologies.

Antagonistic Ability of Trichoderma sp. against Ganoderma sp. on Litter Medium of Acacia mangium Samingan Samingan
Jurnal Natural Volume 14, Number 2, September 2014
Publisher : Universitas Syiah Kuala

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Trichoderma sp are common fungi in the soil and play important role in decomposing of cellulose-rich. The distribution of Trichoderma sp (TBPH isolate) in litter layers of Acacia mangium was observed in two years’ old of health standing (2S) and Ganoderma sp-attacked standing (2G). The objectives of this research were to observe Trichoderma sp distributions in leaf litter layers and to determine of antagonistic ability of Trichoderma sp TBPH against Ganoderma sp (GBR isolate). Trichoderma sp in sawdust medium was spread above of F litter layer in 50 x 50 cm area. Total populations of Trichoderma were observed each month during eight months. Antagonistic activities of Trichoderma sp TBPH against Ganoderma sp GBR were tested by dual test method on PDA and PDA with litter powder (PDAS) media. The results showed that populations of Trichoderma sp were fluctuating and the highest population on both standings of F layer and were followed by H and L layers. Fluctuations of Trichoderma sp population on L layer were tended to follow rainfall fluctuations while those on F layer were tended to follow litter pH fluctuations. Antagonistic test showed that inhibition percentage of PDAS medium was lower than those of PDA medium indicating litter amendment on media being causes of lower antagonistic activities of Trichoderma sp.

Some additional records to the inventory of dragonflies and damselflies (Odonata) in Andalas University’s Limau Manis campus complex, Padang, West Sumatra MUHAMMAD NAZRI JANRA; HENRY HERWINA
Jurnal Natural Volume 20 Number 1, February 2020
Publisher : Universitas Syiah Kuala

Since the publication of inventory list for dragonflies and damselflies within the boundary of Andalas University’s Limau Manis Campus Complex, Padang, on 2018, the survey efforts have been continuously conducted. Hence, in this article we add five odonate species new for Andalas University’s Limau Manis Campus Complex, with one species Drepanosticta cf. bispina may require further investigation and elaboration on its existence in West Sumatra. We also corrected the identification of Heliocypha fenestrata into H. angusta angusta. With this addition, Andalas University’s Limau Manis Campus Complex currently resides for 32 species and 9 families of Odonata, increasing from previously 27 species and 8 families.

AN INDICATION OF AFRICAN CATFISH’S (CLARIAS GARIEPINUS) BEHAVIORAL CHANGES AS A RESPONSE FOR INCREASED SEISMIC ACTIVITY Teuku Reza Ferasyi; Mustafa Sabri; Hamdani Hamdani; Azhari Azhari; Amiruddin Amiruddin; Erwin Erwin; Wolfgang Straka; Robert Faber
Jurnal Natural Volume 13, Number 1, March 2013
Publisher : Universitas Syiah Kuala

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This report was aimed to describe the behavioral changes of catfish as observed before two different earthquakes hit the Province of Aceh, Indonesia in year of 2012. A number of 5 African’s catfish (Clarias gariepinus) were placed in an aquarium located in Gapang, Sukakarya Sub-district of Sabang Town, Aceh. Their behavior activities were observed manually at three different times (08.00 AM, 01.00 PM, and 05.00 PM) every day from 1st March up to 11th April 2012. The result of observation showed that the activity of catfish was different between all of them from 1st March 2012 up to morning observation on 11th April 2012. Most of those activities was not showed as very active behavior. However, their behavior was very active in the same pattern when observed at noon and afternoon times on 11 April 2012. On this date, there were two consecutive earthquakes happened at magnitude of 8 Richter Scale at 03.38 PM and 05.43 PM. The epicenter of this earthquake was in Simeulue, with the distance of more and less of 390 km from observation station of catfish in Gapang. It was noted that this abnormal behavior possibly showed as an indication of their ability to detect the increase of pre-seismic activity at 2.38 hours and 43 minutes before the two earthquakes. Perhaps, it is the result of their response to the increase of pre-seismic electromagnetic wave. Further continuous observation and research is needed to ensure the role of African’s catfish (Clarias gariepinus) as abio-sensor for the increase of seismic activity.

Virulence of conidia Beauveria bassiana (Bals.) as a bioinsecticide against Crocidolomia pavonana (F.) (Lepidoptera: Pyralidae) on broccoli plants MUHAMMAD SAYUTHI; ALFIAN RUSYDI; HASNAH HASNAH; NAILA EVI AZAHRA
Jurnal Natural Volume 22 Number 1, February 2022
Publisher : Universitas Syiah Kuala

Crocidolomia pavonana is an important pest of broccoli plants. Pest control is currently still using chemical pesticides that negatively impact the environment. It is hoped that Beauveria bassiana will become one of the environmentally friendly bioinsecticides. The research aimed to study the virulence level of conidia density of B. bassiana as a bioinsecticide against C. pavonana pests on broccoli plants. This experiment used a completely randomized design consisting of 5 treatments and four replications so that 20 experimental units were obtained. The Basic Plant Protection Laboratory and Plant Pest Science Laboratory Faculty of Agriculture, Syiah Kuala University as the research location, which was carried out from January to September 2021. The parameters observed were larval mortality, pupae formed, imago appeared, an incubation period of B. bassiana conidia, and average time of C. pavonana. The results showed that B. bassiana with conidia density of 108/mL distilled water was effective as a bioinsecticide against C. pavonana. The highest percentage of C. pavonana mortality observed at 6 Days After Application (DAA) occurred at a density of 108 conidia/mL of water (97.50%), and the lowest was at a density of 102 conidia/mL of distilled water (62.50%). The percentage of pupae formed was observed. At 7, DAA was 15% using a density of 102 conidia /mL aquadest. Produce 5%, a density of 104 conidia/mL of distilled water was used. The percentage of imago that appeared with a conidia density of 102/mL of distilled water killed at 14 DAA yielded 15%, and 5% resulted from a density of 104 conidia/mL of distilled water. The fastest incubation occurred at a density of 108 conidia/mL of distilled water with a time of 3.50 days. Death of C. pavonana at 3.03 days required conidia density of B. bassiana 102/mL of distilled water.

MOLECULAR IDENTIFICATION OF SHOREA JOHORENSIS IN KETAMBE RESEARCH STATION, GUNUNG LEUSER NATIONAL PARK Nir Fathiya; Essy Harnelly; Zairin Thomy; Iqbar Iqbar
Jurnal Natural Volume 18, Number 2, June 2018
Publisher : Universitas Syiah Kuala

Shorea johorensis is one of the red meranti plants in Ketambe Research Station, Gunung Leuser National Park, Aceh Tenggara. Currently, Shorea johorensis also is well known as a major source of valuable commercial timber. This research aimed to analyze the phylogenetic of Shorea johorensis based on chloroplast and nuclear DNA in Ketambe Research Station so that it can be known the relationship of Shorea johorensis with other species Dipterocarpaceae in GenBank database. The research was conducted from July 2015 to August 2016 in Ketambe Research Station and Forestry and Forest Genetics Laboratory of Molecular, Bogor Agricultural University. The method used quadrat sampling technique with purposive sampling and experimental laboratory that consisted of DNA extraction, PCR, electrophoresis, and sequencing. The data analysis was done using BioEdit, MEGA6, and BLAST. The results showed that the phylogenetic tree of Shorea johorensis based on the rbcL and matK showed that Shorea johorensis was closely related with some species Hopea; but the phylogenetic tree based on psbA-trnH, 5.8S rRNA, ITS2, and 28S rRNA showed that Shorea johorensis was closely related with Shorea robusta.Keywords: Chloroplast dna, Ketambe Research Station,Nuclear DNA, Shorea johorensis

The potential of silver nanoparticles to control Rhizoctonia solani (AG3-PT) growth in vitro HARTATI OKTARINA; JAMES WOODHALL; IAN SINGLETON
Jurnal Natural Volume 21 Number 1, February 2021
Publisher : Universitas Syiah Kuala

Silver nanoparticles (AgNPs) have known anti-microbial properties and therefore have the potential to be used to control fungal plant pathogens. In this study we investigated the growth of a plant pathogenic fungus, Rhizoctonia solani (AG3-PT) in the presence of AgNPs. The effect of AgNPs at two different levels (20 and 50 mg L-1) on hyphal growth and sclerotium production and viability in R. solani was investigated. The results showed that at 20 mg AgNPs L-1 R. solani hyphal growth was reduced along with the production of sclerotia. The results indicate that AgNPs have the potential to control R. solani growth and subsequent development of plant disease symptoms.

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Suhartono

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suhartono@usk.ac.id

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Journal Mail Official
jurnal.natural@fmipa.unsyiah.ac.id

Editorial Address
Block A 2nd Floor FMIPA USK Jl. Tegk. Syech Abdurrauf No. 3, Banda Aceh, 23111, Indonesia

Location
Kab. aceh besar,

Aceh

INDONESIA