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Jurnal Natural
Published by Universitas Syiah Kuala
ISSN : 14118513     EISSN : 25414062     DOI : https://doi.org/10.24815/jn
Core Subject : Science, Agriculture,
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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Natural Decomposer (MOL) developed from various banana waste and different storage times DEWI YUNITA; IRFAN IRFAN; MARLINA MARLINA
Jurnal Natural Volume 21 Number 2, June 2021
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v21i2.20198

Abstract

MOL is a local microorganism or natural decomposer that is used as a starter culture in production of organic fertilizers which is known as bokashi. The advantage of using MOL is that it can be made from cheap materials or by utilizing agricultural waste so that it can increase the added value of waste as well as reduce the environmental pollution. The use of MOL as a biodecomposer in production of bokashi can accelerate the fermentation process. This study aimed to produce MOL where the characteristic is similar with commercial Effective Microorganism (EM4). This study used a factorial randomized block design (RBD) with 2 factors. First factor was the types of banana (J) consisted of three levels, namely awak banana (Musa paradisiacal var. Awak; J1), barangan banana (Musa acuminate Colla; J2), and kepok banana (Musa acuminata balbisiana Colla; J3). Second factor was the storage times consisted of three levels, namely 0 weeks after fermentation (L1), 2 weeks after fermentation (L2), and 4 weeks after fermentation (L3). The analysis carried out after fermentation included total cell counts (TCC), pH value, temperature, and organoleptic test in the form of hedonic test for color and description test for aroma. The best sample was determined based on the highest TCC, the lowest pH value and aroma using a ranking test. The best treatment was obtained from J1L2 treatment (awak banana and 2 weeks after fermentation) with 1.8 × 109 CFU/ml of TCC, 3.17 of pH and medium tapai aroma.
EFFECT OF BENTONITE AS FILLER IN COMPOSITE MEMBRANE PERFORMANCE POLYVINYLIDENE FLUORIDE (PVDF)-POLYMETHYLMETHACRYLATE (PMMA) Erda Marniza; Marlina .; M Nasir
Jurnal Natural Volume 18, Number 1, February 2018
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v18i1.8023

Abstract

Abstract. The effect of bentonite as filler on the performance of the composite membrane of PVDF-PMMA has been performed. This study was conducted to determine the performance PVDF-PMMA composite membranes and membrane applications PVDF-PMMA-Bentonite on oily wastes. Bentonite is obtained from North Aceh while PVDF membrane-PMMA by phase inversion method. This study uses an oily waste water model was made by mixing surfactant tween 80 with concentration of 2% with palm oil and gas oil. Membrane PVDF-PMMA-Bentonite is analyzing using cell ultrafiltration (flux test), FTIR and SEM-EDX. The results showed that the value of flux with the addition of bentonite is greater than without bentonite. Good flux values contained in the PVDF-PMMA-Bentonite (1:1:2) amounted to 32.143 L/m2.h.bar with permeability of 21.428 L/m2.h. FTIR characterization analysis results show that bentonite can add to pore at wave number 1520 cm -1 and 1660 cm-1 SEM and EDX results showed regular shape and uniform pore. Keywords: Membrane, bentonite, filler, FTIR, SEM-EDX, Oily wastewater 
REFERENCE ON THERMOPHYSICAL PROPERTIES: DENSITY AND VISCOSITY OF WATER FOR ATMOSPHERIC PRESSURE Elin Yusibani; Aprina Aprina; Teuku Khairuman
Jurnal Natural Volume 16, Number 2, September 2016
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v16i2.4919

Abstract

A reference on thermophysical properties, density and viscosity, for water at atmospheric pressure has been developed in MS Excel (as a macros). Patterson’s density equations and Kestin’s viscosity equations have been chosen as a basic equation in the VBA programming as a user-defined function. These results have been compared with REFPROF as a wellknow standart reference
Anticancer activity and apoptotic induction of Chromolaena odorata Linn leaves extract and fractions on hepatocellular carcinoma cell lines (HepG2) HANIFAH YUSUF; MARHAMI FAHRIANI
Jurnal Natural Volume 22 Number 1, February 2022
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v22i1.22854

Abstract

The purpose of this study is to screen and to evaluate anticancer activity and apoptosis induction of Chromolaena odorata (C. odorata) leaves extract and its fractions on HepG2 cancer cell lines. The C. odorata leaves were extracted by maceration using ethanol 80% then fractionated by using n-hexane, ethyl acetate and ethanol. MTT assay method was used to evaluate anticancer activity and flowcytometri method used to evaluate the induction of apoptosis. The phytochemical analysis and  characterization of the major compound of the extract and the fractions were done by using Liquid Chromatography-Mass Spectroscopy (LCMS). The phytochemical analyis showed that the crude ethanolic extract and fractions of C. odorata leaves contains alkaloid, flavonoids, phenolic, steroids, tannin and saponin. The result of LCMS shown the major compounds of the extract and fractions are 5,7,8,3′,4′-Pentamethoxyflavonone, 1-Carboethoxy-β-carboline, 3-Methylcanthin-2, 6- dion, Canthin-6-one. In the n-hexane fraction obtained 5,7,8,3′,4′-Pentamethoxyflavonone, Methyl ophiopogonanone A and Pd-C-Ⅱ. Meanwhile, in the ethyl acetate fraction contained, 3-(3′,4′-Dihydroxybenzyl)-7-hydroxychroman-4-one, 3-(4'-Hydroxy-benzyl)-5,7-dihydroxy-6-methyl-8- methoxy-chroman-4-one, Methyl opiopogonanone A and Sinensetin. The ethanol fraction, contained the compound 3-(3′,4′-Dihydroxybenzyl)-7-hydroxychroman-4-one, 3-(4'-Hydroxy-benzyl)-5,7-dihydroxy-6-methyl-8- methoxy-chroman-4-one and Methyl opiopogonanone A. The crude ethanolic extract, n-hexane fraction, ethyl acetate and ethanol fraction extract have anticancer activities with IC50 value of 23.44 mg/mL, 84.52mg/mL; 88.51mg/mL; and 167.49 mg/mL respectively. This research suggests the crude ethanolic extract of Chromolaena odorata leaves has a potential candidate for hepatocarcinoma treatment.
POPULATION STRUCTURE OF DIPTEROCARPACEAE SPECIES IN KETAMBE RESEARCH STATION, GUNUNG LEUSER NATIONAL PARK, ACEH TENGGARA Rizki Amelia; Saida Rasnovi; Essy Harnelly
Jurnal Natural Volume 19, Number 1, February 2019
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v19i1.12869

Abstract

Ketambe Research Station is one of the oldest and most complete stations in the world which has abundant biodiversity. The Dipterocarpaceae is one of the family identified as growing in the forest area of Ketambe Research Station. Ecologically, Dipterocarpaceae has several limiting factors for its growth and distribution and the most determining factors are soil factors and climate. Dipterocarpaceae is also known as nest and source of food for orangutans, namely Shorea spp. Therefore, it is necessary to conduct research that aims to determine the population structure of Dipterocarpaceae species in Ketambe Research Station. The method used Quadrat Sampling Technique. Theplacement of the sampling plot was randomly carried out in 25 plots with an area of 1 ha. The result showed that there were three species of Dipterocarapaceae found in this station i.e., Parashorea lucida, Shorea johorensis and Hopea dryobalanoides. Based on the population structure pyramid, P. lucida will survive and develop in the future S. johorensis and H. dryobalanoides, on the other hand, are estimated to decrease or hardly survived in the future.
Total phenolic and flavonoids content, and antioxidant activity of kratom (Mitragyna speciosa Korth.) leaf ethanol extract MASRIANI, MASRIANI; MELANIA, PURNAMA; MUHARINI, RINI; ALIMUDDIN, ANDI HAIRIL; SARTIKA, RODY PUTRA
Jurnal Natural Volume 24 Number 1, February 2024
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v24i1.33125

Abstract

This study aims to determine and compare antioxidant activity, total phenolics, flavonoids, and the relationship of phenolic and total flavonoids with the antioxidant activity of the three kratom variants. The ethanol extract of the third variant of kratom leaves was obtained by maceration. Through the antioxidant activity test using DPPH method, all three extracts showed strong antioxidant activity with IC50 values of 26.39, 30.25, and 30.59 g/mL. The relationship of total phenolics and flavonoids with antioxidant activity was determined by the Pearson correlation test. Examination of total phenolic content using the Folin-Ciocalteu method with successive results for green, red, and white kratom are 6.11, 8.67, and 9.09 mg GAE/g extract. Examination of total flavonoid content using the colorimetric method for green, red, and white kratom were 0.86, 0.68, and 1.13 mg QE/g extract, respectively. The total phenolic content and antioxidant activity showed a correlation coefficient value of -0.32 (P0.05), and the total flavonoid content to antioxidant activity showed a correlation coefficient value of 0.81 (P0.05). Thus, all three variants of kratom have potency as natural antioxidants, but their total phenolic and flavonoid content does not influence their antioxidant activity.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v21i1.17555

Abstract

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.
SHALLOW WATER EQUATION SOLUTION IN 2D USING FINITE DIFFERENCE METHOD WITH EXPLICIT SCHEME Nuraini Nuraini; Syamsul Rizal; Marwan Ramli
Jurnal Natural Volume 17, Number 2, September 2017
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v17i2.7997

Abstract

Abstract. Modeling the dynamics of seawater typically uses a shallow water model. The shallow water model is derived from the mass conservation equation and the momentum set into shallow water equations. A two-dimensional shallow water equation alongside the model that is integrated with depth is described in numerical form. This equation can be solved by finite different methods either explicitly or implicitly. In this modeling, the two dimensional shallow water equations are described in discrete form using explicit schemes.Keyword: shallow water equation, finite difference and schema explisit.REFERENSI 1. Bunya, S., Westerink, J. J. dan Yoshimura. 2005. Discontinuous Boundary Implementation for the Shallow Water Equations. Int. J. Numer. Meth. Fluids. 47: 1451-1468.2. Kampf Jochen. 2009. Ocean Modelling For Beginners. Springer Heidelberg Dordrecht. London New York.3. Rezolla, L 2011. Numerical Methods for the Solution of Partial Diferential Equations. Trieste. International Schoolfor Advanced Studies.4. Natakussumah, K. D., Kusuma, S. B. M., Darmawan, H., Adityawan, B. M. Dan  Farid, M. 2007. Pemodelan Hubungan Hujan dan Aliran Permukaan pada Suatu DAS  dengan Metode Beda Hingga. ITB Sain dan Tek. 39: 97-123.5. Casulli, V. dan Walters, A. R. 2000. An unstructured grid, three-dimensional model based on the shallow water equations. Int. J. Numer. Meth. Fluids. 32: 331-348.6. Triatmodjo, B. 2002. Metode Numerik  Beta Offset. Yogyakarta.
PHOTOCATALYTIC DEGRADATION OF INDIGO CARMINE BY TiO2/ACTIVATED CARBON DERIVED FROM WASTE COFFEE GROUNDS Irwan Irwan; Surya Lubis; Muliadi Ramli; Sheilatina Sheilatina
Jurnal Natural Volume 16, Number 1, March 2016
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v16i1.4640

Abstract

TiO2/activated carbon derived from waste coffee grounds (TiO2/WCGAC) has been prepared by a sol gel method . Waste coffee ground was chemically activated using hydrochloric acid 0.1 M solution and modified with titanium tetraisopropoxide as TiO2 precursor. The structural features of the photocatalyst was investigated by X-ray diffraction (XRD), scanning electron microscope energy dispersive X-ray spectroscopy (SEM EDX),  Fourier transform infrared spectroscopy (FT-IR) and nitrogen adsorption-desorption. The XRD results showed that TiO2 is anatase and rutile phase, while FTIR spectra confirmed the presence of  Ti-O groups. The specifics surface area of TiO2/WCGAC was higher than that of activated carbon derived from waste coffee grounds. The photocatalytic activity of TiO2/WGCAC has been evaluated for degradation of indigo carmine solution under UV and solar light irradiation. It was found that degradation percentage of indigo carmine under solar light was higher than that of under UV light.
The effect of ripeness level, storage and heating conditions on vitamin C in Fig (Ficus carica L.) fruit juice using bivoltammetry sensor NERDY NERDY; NILSYA FEBRIKA ZEBUA; TJUT XENA; MAYA KUSUMA; RANI FARAH BUTSAINAH TANJUNG
Jurnal Natural Volume 23 Number 3, October 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v23i3.32158

Abstract

Vitamin C, as a crucial nutrient, plays a vital role in human health and is known to be sensitive to various factors such as ripeness level, storage and heating conditions. This study aimed to determine the effect of ripeness level, storage and heating conditions on vitamin C in fig (Ficus carica L.) fruit juice using bivolmetric sensor. Fig (Ficus carica L.) fruit juice samples with different ripeness level were collected and analyzed the vitamin C. Full-ripe fig (Ficus carica L.) fruit juice samples subjected at different storage (cold, cool, and room temperature) and heating (30 °C, 60 °C, and 90 °C) conditions. The vitamin C level was monitored using a bivoltammetry sensor. The results showed that the higher ripeness level of fig (Ficus carica L.) fruit the lower level of the vitamin C. The results also showed that the higher storage and heating conditions generally accelerate with degradation of vitamin C. Degradation of vitamin C content in fig (Ficus carica L.) fruit juice with all different storage temperature had the best kinetic model fit zero order. Meanwhile, heating temperature at 30 °C and 60 °C showed that the best kinetic model fit first order. But, heating temperature at 90 °C showed that the best kinetic model fit second order. The kinetic modeling analysis showed that storage and heating conditions significantly influenced the degradation kinetics of vitamin C in the fig (Ficus carica L.) fruit juice.

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