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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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A PRELIMINARY STUDY ON AQUIFER IDENTIFICATION BASED ON GEO-ELECTRICAL DATA IN BANDA ACEH, INDONESIA Didik Sugiyanto; Ibnu Rusydy; Marwan Marwan; Dian Mutia Hidayati; Asrillah Asrillah
Jurnal Natural Volume 18, Number 3, October 2018
Publisher : Universitas Syiah Kuala

The aquifers exploration has been conducted at the western part of Banda Aceh, Indonesia. This research aims to explore the aquifer layer beneath the surface and to obtain the cross-section model of the aquifer. The Vertical Electrical Sounding (VES) method was applied to investigate the aquifer layer. The VES method worked as the current penetrated into the ground using of two electrodes and the potential response due to its current being measured by another two electrodes. Ten grid points of VES has performed in western part of Krueng Aceh of Banda Aceh using the ARES (Automatic Resistivity Meter). The Res1Dinv and curve matching computer software used in VES data processing and analysis. The result shows the resistivity value of aquifer in Banda Aceh city at the range of 1 – 12 Ωm for freshwater, and 0.1 – 0.6 for brackish water layer. The first aquifer (water table) found at a depth of 0.5 to 2 meters beneath the surface. The 2-meters water table mostly located near the coastal zone or downstream zone of Krueng Aceh basin and shallow depth of 0.5 meters on the upstream. More than one aquifer layers were found beneath the surface, they were separated by aquitard layer consisting of silt to clay layers.

The Influence of Coconut Water and Activated Charcoal in MS Medium on In Vitro Callus Regeneration of Dendrobium sp. Cultivar Bertha Chong Orchids Dessi Novita Sari; Zairin Thomy; Yunita Yunita
Jurnal Natural Volume 15, Number 1, March 2015
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (88.411 KB)

Dendrobium is one of the most commercial orchids. In Vitro technique is one of solution to fulfill the market demand of Dendrobium. Organic matters, such as coconut water, and activated charcoal are often given to in vitro medium to regenerate orchids callus. The addition of activated charcoal is not only adsorbing toxic substances but also organic matters. The aimof this researchistofindthe best combination for callus regeneration medium. The research was conducted at the Biological Cell and Molecular Laboratory, Mathematics and Natural Science Faculty of Syiah Kuala University, Darussalam, Banda Aceh since March to November 2013. The method used is experimental with Completely Randomized Factorial Design with two factor; treatments of coconut water and activated charcoal. The result showed that the combinationof 150mL/Lcoconut waterand2,0g/Lactivated charcoal is the best resultbecauseit is the onlytreatment that have capability in producingplantletswithin60days.

Isolation and characterization of cellulose from rice husk waste and sawdust with chemical method RIZKI ANDALIA; RAHMI RAHMI; JULINAWATI JULINAWATI; HIRA HELWATI
Jurnal Natural Volume 20 Number 1, February 2020
Publisher : Universitas Syiah Kuala

Cellulose had been isolated from rice husk waste and sawdust with chemical method through hydrolysis with HCl 2.5 N and bleaching process with H2O23%.The yields were 13,45% and 22,75% (w/w) of cellulose from rice husk waste and sawdust, respectively. The chemical treatment caused partial removal of lignin and hemicellulose from raw material showed by FTIR spectrum. Structure and morphology of cellulose from rice husk waste and sawdust were investigated using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The XRD patterns showed cellulose structure converted from amorphous to crystalline form after bleaching process while SEM images showed that the isolated cellulose from rice husk waste had rougher surface than cellulose from sawdust. The SEM micrograph also showed that the isolated cellulose from rice husk was in the form of aggregates.

Trichoderma virens ISOLATED FROM COCOA PLANTATION IN ACEH AS BIODECOMPOSER COCOA POD HUSK Rina Sriwati; Tjut Chamzurni; Bukhari Bukhari; Anwar Sanjani
Jurnal Natural Volume 13, Number 1, March 2013
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (481.035 KB)

Sustainable development on cocoa farming have been places great emphasis on the management of natural resources for Cocoa pod husk. Until now, there has been much public attention for a farming waste, environment polluting and a place to develop various diseases, especially fungal Phytopthora. To overcome these problems, it needs to utilize alternative cocoa pods. The aims of this study were: (1) to determine the potential use of Trichoderma virens isolated from cocoa plantation in Aceh as bio-decomposer in the composting process cocoa pods. The composition of potential use experiment; Manure+Trichoderma (PT); Cocoa pod husk+Trichoderma (KT); Cocoa pod husk + Manure (KP); Cocoa pod husk +Manure+Trichoderma (KPT) has been tested. The analysis result showed that the combined use of Trichoderma virens compost although no effect on the color, texture and smell of compost but could be effect on characterized of compost maturity by characteristics of C/N compost. The content of C/N compost on all treatments in accordance with the standard compost maturity thus considered quite feasible to be applied to the crop.

Influence of monomer concentration on the morphology, contact angle, water uptake, and antibacterial activity of grafted cellulose obtained from peel durian ROSLIANA LUBIS; SAISA SAISA
Jurnal Natural Volume 22 Number 1, February 2022
Publisher : Universitas Syiah Kuala

The objective of the current study is to evaluate and determine the effect of monomer concentration of ClAETA on the grafting copolymerization of oxidized cellulose which isolated from peel durian. Four concentrations of ClAETA were used in this study, e.g., 40, 50, 60, and 70%. Several analyses were performed to determine the material characteristic, e.g., degree of grafting, FT-IR, surface morphology, contact angle, degree of swelling, and antibacterial activity. The result showed, monomer concetration plays a significant role to the physical and surface morphology of DAC-ClAETA. The degree of grafting of ClAETA was found in the range of 15-31%, and at the concentration of 50% the grafted oxidized cellulose has 30.4% of degree of grafting. SEM images showed the pore volume has linear correlation to the monomer concetration, it increased the surface roughness. Also, the contact angle confirmed the hydrophilicity and degree of swelling of grafted oxidized cellulose was increase that linear to ClAETA concentration. DAC-g- ClAETA was found antibacterial active against S. aureus, S. epidermis, and C. albicans than DAC.

PHYLOGENETIC RELATIONSHIPS WITHIN FAMILIES MYRTACEAE IN TRIPA PEAT SWAMP FOREST USING INTERNAL TRANSCRIBED SPACER (ITS) Ardhana Yulisma; Zairin Thomy; Essy Harnelly
Jurnal Natural Volume 18, Number 2, June 2018
Publisher : Universitas Syiah Kuala

The Tripa peat swamp forest is located on the west coast of Aceh province and falls administratively under the two districts of Nagan Raya and Aceh Barat Daya. Tripa peat swamp forest has a high diversity of plants. The previous research discovered that Myrtaceae is one of the dominant families in the forest. This study aimed to predict phylogenetic relationships among trees species within families Myrtaceae that live in the Tripa peat swamp forest using Internal Transcribed Spacer (ITS). The research was conducted at Laboratory of Forest Genetics and Molecular Forestry, Faculty of Forestry, IPB from June 2015 to December 2016. The methods were conducted with an experimental laboratory of molecular identification consisting of DNA extraction, amplification, and sequencing. Data was analyze using BioEdit, Clustal X, Mega 6, and BLAST. The morphology identification reported that there were four trees species within families Myrtaceae, i.e., Syzygium sp 1, Syzygium garciniifolium, Syzygium leptostemon and Tristaniopsis whiteana. Reconstruction of phylogenetic tree using the Neighbor-Joining (NJ) method 1000x showed that the ITS region was successfully to predict phylogenetic relationships within genus Syzygium and Tristaniopsis.Keywords: tripa peat swamp forest, tree species, phylogenetic, myrtaceae, internal transcribed spacer

Utilization of Asteraceae family as medicinal plant by local community of hutan pinus Jantho nature reserve, Aceh Besar LIZA FADHILLAH; SAIDA RASNOVI; ZAIRIN THOMY
Jurnal Natural Volume 21 Number 1, February 2021
Publisher : Universitas Syiah Kuala

The use of medicinal plants by local communities is an ethnobotany study that links the culture of the community with the resources of plants that are around it. A study on the utilization of medicinal plants in the Hutan Pinus Jantho Nature Reserve was conducted with the aim of obtaining information about the types of medicinal plants used by local communities around Hutan Pinus Jantho Nature Reserve. This study applies the Participatory Rural Appraisal (PRA) method for interviews conducted by Purposive Sampling. The parameters measured are; parts of medicinal plants used, method of processing, method of use, and location of the collection. According to interview, it found about 10 species of Asteraceae those have medical potential, 3 of them already use by the local community of CAHPJ, these are Blumea balsamifera L., Chromolaena odorata L., and Tagetes erecta L., these species could cure the wound, heal the cold, fever, stomachache and other diseases.

MATH INSTRUCTIONAL MEDIA DESIGN USING COMPUTER FOR COMPLETION OF TWO-VARIABLES LINEAR EQUATION SYSTEM BY ELIMINATION METHOD* Nurbaiti Nurbaiti; Salmawaty Salmawaty; Muhammad Subianto; Reza Wafdan
Jurnal Natural Volume 17, Number 1, March 2017
Publisher : Universitas Syiah Kuala

Abstract. Science and technology have been rapidly evolved in some fields of knowledge, including mathematics. Such development can contribute to improvements on the learning process that encourage students and teachers to enhance their abilities and performances. In delivering the material on the linear equation system with two variables (SPLDV), the conventional teaching method where teachers become the center of the learning process is still well-practiced. This method would cause the students get bored and have difficulties to understand the concepts they are learning. Therefore, in order to the learning of SPLDV easy, an interesting, interactive media that the students and teachers can apply is necessary. This media is designed using GUI MATLAB and named as students’ electronic worksheets (e-LKS). This program is intended to help students in finding and understanding the SPLDV concepts more easily. This program is also expected to improve students’ motivation and creativity in learning the material. Based on the test using the System Usability Scale (SUS), the design of interactive mathematics learning media of the linear equation system with Two Variables (SPLDV) gets grade B (excellent), meaning that this learning media is proper to be used for Junior High School students of grade VIII.Keyword: SPLDV, Learning Media, Students’ Electronic Worksheet (e-LKS) *Judul ini telah dipresentasikan pada Seminar Nasional: Indonesian Students Conference on Science and Mathematics(ISCSM) 11-12 November 2015, Banda Aceh Indonesia

UJI EFEKTIVITAS SEDIAAN GEL FRAKSI ETIL ASETAT DAUN JAMBU BIJI (Psidium guajava Linn) TERHADAP PENYEMBUHAN LUKA TERBUKA PADA MENCIT (Mus musculus) Lydia Septa Desiyana; Muhammad Ali Husni; Seila Zhafira
Jurnal Natural Volume 16, Number 2, September 2016
Publisher : Universitas Syiah Kuala

Guava leaf has various benefits, one of them is accelerating the healing process of a wound. This study aims to formulate the ethyl acetate fraction into a gel form and test the effectiveness of gel formulation toward open wounds in 16 male mices (Mus musculus) which made excision 1 cm circular full thickness wound on the back of mice parallel with Os. vetebra. The ethyl acetate fraction of guava leaf has been made into concentrations of 5% and 7% with base gel used as negative control and Bioplacenton as positive control. The evaluation towards ethyl acetate fraction gels showed the gels have green-yellow color, guava odor, homogenous, relevant pH to the skin 6,31-6,51, and spread over 2,8-3 cm (stiff gel). The gels were applied onto the wounds twice a day for about 21 days. The observation was conducted every day towards the scab formation day, scab chipped day, and wound healing day. The data were analyzed statistically using one way ANOVA then continued with Tukey test. The average day for scab formation, scab chipped, and wound healing process, successively are in the negative control i.e. 6,50 ; 13,50 ; 20,25, then positive control of 3,75 ; 11,00 ; 17,25, for gel with 5% concentration, 3,75 ; 9,75 ; 16,50, and gel with 7% concentration, 4,50 ; 12,00 ; 18,25. The statistical result showed that the ethyl acetats fraction could accelerate the scab formation (p0,05) and the open-wound healing (p0,05) in mice than the control negative (p0,05), but not in the scab exfoliation (p0,05). Gel concentration 5% accelerated faster in forming the scab, flaking off the scab, and healing the wound compared with the gel concentration of 7%.

The Effect of Ge Content on the Optical and Electrical Properties of A-Sige: H Thin Films Mursal Mursal; Irhamni Irhamni; T Winata
Jurnal Natural Volume 14, Number 1, March 2014
Publisher : Universitas Syiah Kuala

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The effect of Ge content on the optical and electrical properties of a-SiGe:H thin films deposited by HWC-PECVD had been investigated. The a-SiGe:H films ware grown on corning glass 7059 substrate using 10% diluted mixture of GeH4 and SiH4 gases, respectively. The GeH4 gas flow rate was varied from 2.5 – 12.5 sccm, while the flow rate of SiH4 was kept constant at 70 sccm. The results showed that the deposition rate of a-SiGe:H thin films increased by increasing of GeH4 gas flow rate. In addition, the Ge content in the film increased and the optical band gap decreased. The dark conductivity of a-SiGe:H films were relatively constant, whereas the photo conductivity decreased with increasing of Ge content.

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Contact Name
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