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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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INVENTORY OF DRAGONFLIES AND DAMSELFLIES (ODONATA) IN ANDALAS UNIVERSITY’S LIMAU MANIS CAMPUS COMPLEX, PADANG: USING PHOTOGRAPHICAL APPROACH Muhammad Nazri Janra
Jurnal Natural Volume 18, Number 2, June 2018
Publisher : Universitas Syiah Kuala

Odonata, which consists of true dragonflies and damselflies, is considerably understudied in Sumatra, especially in West Sumatra region. While the campus area of Andalas University in Limau Manis provides many suitable habitats for dragonflies and damselflies, the least has been done in learning these organisms. In this paper, we intend to conduct the inventory of Odonata in Limau Manis area by using photography approach (by taking decent pictures only, without sampling the animal). After spending 14 days of data collection which spanned from October 2017 until February 2018), we listed 27 Odonata species. Of which, 11 species belong to four families under suborder Zygoptera and 16 species grouped into four families under suborder Anisoptera. Libellulidae is a family under Anisoptera that was found with most species members. Photography approach promises an immense help in doing species inventory for this animal group for its reliability in determining species identification without harming species’ population.Keywords: damselflies, dragonflies, Libellulidae, Limau Manis area, photography approach

Classification of Jades (Giok) Beutong Aceh based on Mineral Composition Nurul Aflah; Muchlis Muchlis; Khairul Halimi; Hayatun Nufus; Zoraya Maysura; M. Zuhri Simatupang
Jurnal Natural Volume 14, Number 2, September 2014
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (97.42 KB)

Beutong is a commercial origin of various kinds of Jade (Giok) in Aceh Province. From the geological view the formation of jade is due to the mélange zone. The zone is usually an assemblage of a variety mineral composition. The paragenetic minerals of the jade can be divided into four categories, which are Jadeite, Nephrite, Serpentine and Vesuvianit. The characteristics of the color were associated with a variety of constituent minerals which can be red, yellow, brown, gray, and black. Thus, by this paper we classified the jades based on their mineral constituents.

ANTIOXIDANT ACTIVITY OF ETHYL ACETATE EXTRACT OF NUTMEG (Myristica fragrans Houtt) STEM BARK Ilham Maulana; Binawati Ginting; Nurdin Nurdin; Saiful Fakri
Jurnal Natural Volume 19 Number 3, October 2019
Publisher : Universitas Syiah Kuala

Antioxidant activity test for the extract of ethyl acetate nutmeg stem bark (Myristica fragrans Houtt) was carried out using 2,2-diphenyl-1picrylhydrazil (DPPH). The test results of antioxidant activity of ethyl acetate nutmeg stem bark extract with DPPH method at a concentration of 25 ppm, 50 ppm and 100 ppm obtained IC50 value = 68.14 ppm with IC50 value of vitamin C (as positive control) 3.657 ppm. The results of column chromatographic separation of ethyl acetate nutmeg stem bark extract obtained 5 combined fractions namely MFEK 1, MFEK 2, MFEK 3, MFEK 4 and MFEK 5. The test results of the fraction antioxidant activity in a good category were the MFEK 1 fraction. The MFEK 2 fraction to MFEK 5 showed an antioxidant activity lower than compared to the ethyl acetate extract. This shows that the ethyl acetate nutmeg stem bark extract has a better inhibitory activity, because there are several active compounds contained in the extract which can inhibit free radicals, so the IC50 value of the extract is better than the fractions.

HIV Genotype Analysis from HIV Infected Patients in East Java Area Yulia Sari Ismail; Soetjipto Soetjipto; Eddy Bagus Wasito; Nasronudin Nasronudin
Jurnal Natural Volume 12, Number 2, September 2012
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.358 KB)

Human Immunodeficiency Virus type 1 (HIV-1) has been known to cause Acquired Immune Deficiency Syndrome (AIDS) disease and has been alaso divided into several subtypes (A, B, C, D, F, G, H, J, K) and Circulating Recombinant Form (CRF). Different characteristics of subtype of the virus and its interaction with host can affect the severity of the disease. This study was aimed to analyze HIV-1 genotypes circulating in HIV/AIDS patients from the East Java region descriptively. Information from this research was expected to complement the data of mocular epidemiology of HIV in Indonesia. This study used blood plasma from patients who had been tested to be HIV positive who were seeking treatment or are reffered to the Intermediate Care Unit of Infectious Disease (UPIPI) Dr. Soetomo Hospital Surabaya from various area representing the East Java regions. Plasma was separated from blood samples by centrifugation for use in the the molecular biology examination including RNA extraction, nested PCR using specific primer for HIV gp120 env gene region, DNA purifying, DNA sequencing, and homology and phylogenetic analysis. Based on the nucleotide sequence of the HIV gp120 env gene, it was found that the most dominant genotypes in East Java belonged to one group of Circulating Recombinant Form (CRF), namely CRF01_AE and CRF3x_01B, which has been also found in Southeast Asia. In the phylogenetic tree, most of HIV samples (30 samples) were in the same branch with CRF01_AE and CRF3x_01B, except one sample (HIV40) was in the same branch with subtype B.

Application of PLS SEM in Evaluations of Mathematics Statistics II Course Online Learning IZZATI RAHMI; MAHDHIVAN SYAFWAN; HAZMIRA YOZZA; IQBAL HAMONANGAN; FRILIANDA WULANDARI
Jurnal Natural Volume 22 Number 1, February 2022
Publisher : Universitas Syiah Kuala

The impact of the COVID-19 pandemic on the education sector includes the learning system that cannot be conducted directly (offline). With the change in the learning system, it is necessary to evaluate whether the implemented online learning system can run well and provide results as expected. The level of student satisfaction is one of the factors that can be used to evaluate online learning. This study analyzed the student satisfaction level with online learning for the Mathematics Statistics II course at the Mathematics Department of Andalas University, related to service quality by lecture and the level of student understanding. Data analysis was conducted using causal modeling, namely Partial Least Square Structural Equations Modeling (PLS-SEM). By using The PLS-SEM, it is known that there is a significant and positive effect of service quality on student satisfaction in the Mathematics Statistics II course. In addition, the service quality also affects the understanding level significantly and positively. However, the level of student understanding has no significant effect on the level of student satisfaction. The coefficient of determination (R2) from the structural model of student satisfaction toward the Mathematics Statistics II course online learning is 0.774. This value indicates that the resulting model is good because it has relatively high accuracy.

PHYTOCHEMICAL SCREENING OF VOLVARIELLA VOLVACEA (STRAW MUSHROOM) EXTRACT FROM ACEH’S LOCAL CULTIVATION Sadli .
Jurnal Natural Volume 18, Number 1, February 2018
Publisher : Universitas Syiah Kuala

Abstract. A research on analyzing the phytochemical content in Volvariella volvacea (straw mushroom) extract from a local cultivation in Aceh has been conducted. Straw mushroom is potentially a medicine ingredient. This study aims to examine the secondary metabolite compounds in the methanol extract of straw mushroom. The extraction of the secondary metabolite compounds was undertaken by using the maceration method with methanol solvent. Phytochemical test was conducted qualitatively by using the meyer’s reagent, bouchardat, dragendrof, FeCl3, HCl 0.1 M, HCl 2N and Lieberman – bouchardat. Phytochemical analysis was carried out on flavonoids, alkaloids, glycosides, saponins, tannins and terpenoids. The phytochemical analysis’ result shows that the straw mushroom extract contains alkaloids, flavonoids, terpenoids, and saponins.Keywords: straw mushroom, methanol extract, maceration method, phytochemical screening

Exploration of potential wild medicinal mushrooms from Pocut Meurah Intan forest park, Aceh, Indonesia HENDRIX INDRA KUSUMA; ESSY HARNELLY; ZAIRIN THOMY; MUHAMMAD ADRIYAN FITRA; SAMINGAN SAMINGAN
Jurnal Natural Volume 20 Number 3, October 2020
Publisher : Universitas Syiah Kuala

Mushroom is one of living things with abundant diversity and has various beneficial potentials; one of them is as medicine. The use of mushrooms as medicine has long been known primarily as traditionally made herbs and the knowledge has been passed down for generations. The Pocut Meurah Intan Forest Park as a conservation forest, stores a variety of mushrooms in it. Data about the type of mushroom that has medicinal potential existed in the forest park has never been published so it is important to do so. This study aims to record the types of mushrooms that have benefits as medicines. The method used is an exploratory survey through a trail or tracking path then identified as a medicinal mushroom base on literature studies. The results of the study found 15 species of mushrooms that have potential as medicine, namely Cookeina tricholoma, Sarcoscypha coccinea, Tremella fuciformis, Auricularia auricula-judae, Flammulina velutipes, Schizophyllum commune, Scleroderma citrinum, Boletus edulis, Trametes versicolor, Lentinus tigrinus, Lentinus squarosulus, Ganoderma applanatum, Ganoderma resinaceum, Thelephora ganbajun and Lycoperdon echinatum. This shows that Pocut Meurah Intan Forest Park has great resources and potential that can be utilized for the benefit of the surrounding community, and it needs to be preserved so that diversity is maintained and can be used by future generations.

SINTESIS MEMBRAN POLIURETAN BERBASIS MINYAK BIJI ALPUKAT (Avocado Seed Oil) DAN HEKSAMETILEN-1,6-DIISOSIANAT (HMDI) Fitriani Fitriani; Marlina Marlina; Khairan Khairan
Jurnal Natural Volume 16, Number 2, September 2016
Publisher : Universitas Syiah Kuala

This research aims to synthesize polyurethane membrace from avocado seed oil as a source of hydrixyl (-OH) and hexametylhene -1.6-dissocyanate (HDMI) as a source of isocynate (-NCO). The oil were extracted from avocado seeds at temperature of 60-80oC for 2 hours using n-hexane solvent. The results of FTIR spectrum analysis from avocado seed oil showed that there were -OH clusters absorption on the wavelength number of 3393.819 cm-1, thus this oil can be used to synthesize polyurethane membrane. The isocyanate composition, time and temperature during synthesis process of polyurethane membrane were varied. The polyurethane membrane were moulded in petri dishes, then heated up for 48 hours on the temperature of 70oC, and finally taken out from its mould. The characteristics of the polyurethane membrane from avocado seed oil are brown in colour, homogenous, elastic, solid, transparent and shaped like a membrane. The measurements from FTIR spectrum showed that the -NCO clusters are no longer present. This condition happened because there were no more absorption in the wavelength number of 2270 cm-1 . It can be concluded that the isocyanate has completely reacted during polymerization and the curing process, thus urethane was created in the 1699,965 cm-1 absorption which was the urethane C=O clusters absorption.

Potency Study of N-Hexane Extracts of Black Plum (Syzygium cumini (L.) Skeels) in the Inhibitation Growth of Salmonella typhi and Candida sp. Saida Rasnovi; Risa Nursanty
Jurnal Natural Volume 14, Number 1, March 2014
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (93.192 KB)

N-hexane extracts of the bark from black plum (Syzygium cumini (L.) Skeels) showed activity against Salmonella typhi. Meanwhile, the result showed that N-hexane was not able to inhibit the growth of Candida sp. The research was done at Microbiology laboratory, Biology Department Faculty of Mathematics and Science, Syiah Kuala University. The barks of black plum were collected from Aceh Besar District. The extraction method for black plum used maceration with N-hexane and than concentrated in rotary evaporator. The disc diffusion method used to screen the antimicrobial activity with 20 %, 30 %, 40 % dan 50 % concentration.

Comparison of two DNA extraction methods for dry Leaf Dipterocarpaceae ESSY HARNELLY; NITA TAUHIDA; ISKANDAR ZULKARNAIN SIREGAR
Jurnal Natural Volume 22 Number 3, October 2022
Publisher : Universitas Syiah Kuala

DNA extraction is the first step in obtaining high-concentration and high-purity DNA that can use in the subsequent steps. Because the leaf structure is challenging and contains several secondary metabolites that can affect DNA extraction results, DNA extraction on dry leaves of Dipterocarpaceae is considered problematic. This research aims to find a suitable method for extracting DNA from the preserved Dipterocarpaceae leaves. Preserved leaves of Dipterocarpaceae in silica gel will dry up, making them tough to destroy. Perform DNA extraction is generally using CTAB buffers or extraction kits. According to the results of this study, extraction with modified CTAB buffer result in DNA with higher concentration and purity values than DNA extracted with the kit. DNA isolated from the modified CTAB can be used as a template in the PCR process to amplify the matK gene.

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Suhartono

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jurnal.natural@fmipa.unsyiah.ac.id

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

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Kab. aceh besar,

Aceh

INDONESIA