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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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PENENTUAN WAKTU MATI MEMANFAATKAN DERET HOMOLOG ALKILPARABEN PADA RP-HPLC DALAM SISTEM PELARUT METANOL/AIR Mahmudi .; Saiful .; Khairan .; Rinaldi Idroes
Jurnal Natural Volume 15, Number 2, September 2015
Publisher : Universitas Syiah Kuala

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Abstract

Penelitian ini dalam rangka pengembangan dan aplikasi metode penentuan waktu mati (t0) pada Kromatografi Cair dari yang telah pernah dan berhasil diterapkan di GC. Waktu mati merupakan parameter yang sangat penting untuk penentuan parameter lain seperti Faktor kapasitas (k’), retensi relative (tR’) dan indeks retensi kovats (IR), sehingga didapat hasil berupa data base yang bisa diterapkan dalam intrumentasi GC dan RP-HPLC. Penentuan waktu mati dengan menggunakan dua metode yaitu metode iterasi dan metode linearisasi, sehingga didapat nilai indeks retensi kovats dari senyawa uji pada sistem RP-HPLC dengan menggunakan deret homolog alkilparaben. Hasil penelitian menunjukkan deret homolog alkilparaban terbukti dapat digunakan untuk penentuan indeks retensi Kovats  dalam RP-HPLC dengan koefisien korelasi yang sangat baik  terutama pada sistem pelarut MeHO/H2O (90:10). 
Free Fatty Acids Purification in Biodiesel with Utilizing Rice Husk Silica Muliadi Ramli; Saiful Saiful; Rahmatun Misriana
Jurnal Natural Volume 13, Number 1, March 2013
Publisher : Universitas Syiah Kuala

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Abstract

Silica particles had been successfully separated and extracted from rice husk by using solution of sodium hydroxides (NaOH) as solvent and were characterized with SEM-EDX. The data SEM-EDX showed that the extracted component of the rice husk contained 79,55% (w/w) of silica as the primary component. In order to understand the adsorption capacity of silica in removing free fatty acids (FFA) which were recognized as the contaminants in biodiesel., the profile of time dependence and silica amount in the adsorption process had been investigated in this study. The results indicated that the adsorption process showed optimum condition at 30 minutes with the free fatty acids (about 90,64%) of adsorption). Moreover, the adsorption capacity of silica to those impurities contaminated in biodiesel was proportional to the amount of adsorbent used in the experiment. Finally, biodiesel with less FFA was produced, and the FFA residues remained in the biodiesel were 0,58 mg/g.
Immobilization of urease from Phaseolus vulgaris L. seeds using calcium alginate as a support matrix ZUSFAHAIR ZUSFAHAIR; DIAN RIANA NINGSIH; AMIN FATONI; ELY SETIAWAN
Jurnal Natural Volume 22 Number 3, October 2022
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (858.124 KB) | DOI: 10.24815/jn.v22i3.26056

Abstract

Urease is an enzyme that functions as a catalyst in the hydrolysis of urea into ammonia and carbon dioxide. The industrial sector has made extensive use of urease. To date, enzymes are used in free form, deemed less effective. Therefore, enzymes are used in immobilized form because they can be utilized repeatedly. This research aimed to isolate urease from kidney bean (Phaseolus vulgaris L.) seed and immobilize it using a Ca-alginate support matrix and a trapping technique. Eight days were devoted to germinating kidney bean seeds to begin the investigation. Isolation of crude urease extract from kidney beans was carried out using phosphate buffer pH 7. It was then immobilized with Ca-alginate at different concentrations of Na-alginate and contact times The crude free and immobilized urease extract was further characterized including pH, temperature and stability of repeated use. The urease activity was determined using the Nessler method using a spectrophotometer. The results demonstrated that urease immobilization from kidney bean seeds with a Ca-alginate matrix was most effective at a concentration of 5% Na-alginate and a contact period of 60 minutes, yielding a value of 5.92 U/mL. The optimal pH of free and immobilized urease was 7 and 8, respectively, and temperatures of 35 and 40 °C, respectively. The immobilization of urease from kidney bean seeds using a Ca-alginate support matrix increased the stability of recurrent use by fivefold, while the relative urease activity remained at 52%.
USE OF PLANTS AS TRADITIONAL MEDICINE IN SWAMEDICATION IN PIDIE COMMUNITIES Hardiana Hardiana; Saida Rasnovi; Zumaidar Zumaidar
Jurnal Natural Volume 19 Number 2, June 2019
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.575 KB) | DOI: 10.24815/jn.v19i2.13192

Abstract

Self-medication is an act of self-healing using plants as traditional and modern medicine without the intervention of professional medical personnel. Availability of natural materials and affordable prices encourage people to return to using traditional medicines. The purpose of this study is to find out the types of plants used by the community Pidie, plant parts and reasons for using plants as traditional medicine in self-medication. The type of research used is non-experimental with the survey method and PRA (Participatory Rural Appraisal), by interviewing 1280 respondents. Parameters of this study are the types of plants used, plant parts and reasons for using plants as traditional medicine in self-medication. The results showed that there were 38 tribes and 53 types of plants. The most widely used plant parts were leaves (44.3%), the least were roots (0.7%), and the reason for using plants as traditional medicine in self-medication was easily obtained (53.8%).
ANALYSIS OF MINERAL CONTENTS Ca, Mg, Fe AND Na IN NATURAL BENTONITE CLAY Fathurrahmi Fathurrahmi
Jurnal Natural Volume 12, Number 1, March 2012
Publisher : Universitas Syiah Kuala

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Abstract

This research has been conducted to determine content of natural clay from bentonite in East Java area. There are two types of samples taken from the location, white and yellow clays. Samples were prepared to become the small pieces granulated, then were cleaned with aquadest, and were dried, respectively.After that, samples were re-minimized into 200 mesh in nanoparticles, re-cleaned and dried using oven at temperature 100-110 °Celsius. Ca, Fe, Mg and Na are contents in samples of bentonite Clay being determined by using Atom Absorption Spectrophotometer (AAS). Each part of the substance from yellow bentonite clays and white bentonite clays were measured and analysed its content with three times repetition. Natural-bentonite clays of Pacitan from East Java contained the minerals Ca, Mg, Fe and Na with mean values of the gratuity Ca 0.0127 % Mg 0.24655 %, Fe 0.56178 %, and Na 0.14122 % for yellow bentonite clays (A). White bentonite clays (B) consisted of minerals Fe, Mg, Na, and Ca with mean values of gratuity Ca 0.01856 %, Mg 0.30067 %, Fe 0.61235 %, and Na 0.1608%, respectively.
Microclimate-based mortality analysis of the Cibodas Botanic Gardens plant collection IMAWAN WAHYU HIDAYAT; DIDIK WIDYATMOKO
Jurnal Natural Volume 21 Number 3, October 2021
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1054.443 KB) | DOI: 10.24815/jn.v21i3.21323

Abstract

Despite the routinely conducted treatment and maintenance of garden plant collection, the monthly mortality figures of the Cibodas Botanic Gardens (CBG) plant collections remain significant. It is presumed that the microclimate has a crucial influence on plant survivorship in the field. This study aimed to analyze the effect of microclimate conditions on the mortality rate of the CBG plant collection. The study was conducted by correlating the number of mortal plants with CBG monthly microclimatic conditions from 2017 to 2018. The analyzed microclimate parameters were temperature, relative humidity, precipitation, wind velocity, and solar radiation. The multiple regression modeling, t-test, and Pearson correlation test (r) were utilized to measure the level of significance of the correlation (α = 0.05). The findings were shown that the maximum wind velocity was the primary unit correlated to the number of mortality. The correlation was strong positive (r = 68.8%), and significant (p-value α). We suggested anticipating the disadvantages influences of strong wind supported by other extreme microclimate units, such as heavy rain. These events frequently caused high damage to the tree and other plant collections. These are expected to be taken into a consideration by the CBG operator and management in order to forecast and mitigate the risks of future plant collection losses.
ANTIFEEDANT ACTIVITY FROM NEEM LEAF EXTRACT (Azadirachta indica A Juss) Ridha kurniati; Nurdin Saidi; Rosnani Nasution
Jurnal Natural Volume 18, Number 1, February 2018
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (297.409 KB) | DOI: 10.24815/jn.v18i1.8781

Abstract

Antifeedant activity of neem leaf (A. indica A. Juss) has been identified by against Tenebrio molitor bio-indicator. The highest activity was obtained on ethyl acetate extract at 0.5% concentration having Antifeedant Index (AI) of 51.53% and most active at 10% concentration of 82.05%. The method used to test the antifeedant activity is the no choice leaf disk method. Secondary metabolites contained in neem leaf extract (A. indica A. juss) include terpenoids, steroids, flavonoids, saponins and phenolics. Keywords: Neem leaf (Azadirachta Indica A.Juss),  No choice leaf disk method, Antifeedant ActivityREFFERENCES Benge, M.D. 1986. Neem the Cornucopia Tree. S and T/FENR Agroforestation Technical Series No. 5. Agency for International Development Washington, D.C.190p.Schumutterer., H. 2002. Properties and Potensial of Natural pPsticides from Neem Tree, Azadirachta indica Ann. Rev. Entomol. 35; 271-291Alzohairy, M.A. 2016. Review Article Therapeutics Role of Azadirachta indica (Neem) and Their Active Constituents in Diseases Prevention and Treatment, Article ID 7382506, 11p.4.       Patel, S.M., Venkata., K.C.N., Bhattacharyya, P., Sethi, G., Bishayee, A. 2016. Potential of Neem (Azadirachta indica) For Prevention and treatment of Oncologic Diseases Seminar In Cancer BiologyDiabate, D., Gnago, J.A., Tano, Y., 2014. Toxicity, Antifeedant and Repellent, effect of Azadirachta indica A. Juss and Jatropa carcus L. aqueous extracts agaianst Plutella xylostella  (Lepidoptera: Plutellidae) J. Basic. Appl. Sci. Res. 4 (11) : 51 – 60Jeyasankar, A., and Gokilamani, D., 2016. Biology and eco-friendly control of Amaranth pests, Hymenia recurvalis Fabricus and Psara basalis (Lepidoptera : Crambidae) Inter. J. Acad. Stud. 2 (4): 218 – 230.Pavunraj, M., Muthu, C., Ignacimuthu,S., Janarthanan, S., Duraipandiyan, V., Raja, N. and Vimalraj, S. 2011. Antifeedant Activity of a Novel 6-(4,7-hydroxyl-heptyl)Quinone From The Leaves of The Milkweed Pergularia daemia on The Cotton Bollworm Helicoverpa armegera (Hub.) and The Tobacco Armworm Spodoptera litura (Fab.) Phytoparasitica 39 : 145 – 150.Munoz, E., Lamilla, C., Marin, J.C., Alarcon, J., Cespedes, C.L.m 2012. Antifeedant, Insect Growth and Insecticidal Effec of Calceolaria talcana (Calceolariaceae) on Dropsopphila melanogaster and Spodoptera frugiperda Industrial Crops and Product, 42, 137 – 144.Saxena, M., Saxena, J., Nema, R., Singh, D and Gupta, A. 2013. Phytochemistry of Medicinal Plants Journal pharmacognosy and Phytochemistry, 1;6.Liu, L., Zhao, Y.L., Cheng, G.G., Chen, Y.Y., Qin, angX.J., C.C.W., Yang, X.W., Liu, Y.P., Luo, X.D, 2014. Antifeedant activity and effect of fruits and seed extract of Cabralea canjerana canjerana (Vell.) Mart. (Meliaceae) on the immature stages of the fall armworm Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae Crops and Product. 65 ; 156 – 158.Schoonhven, LM. 1982. Biologycal Aspect of Antifeedant . Ent, Exp and Appl  .31: 57 - 69Gahukar, R.T. 2014. Factor Affecting Content and Bioefficacy of Neem (Azadirachta indica A. Juss) Phytochemicals used in Agriculture pest control A Review. Crop Protection. 62: 93 – 99.Pattanaik, S.J., Ranghupati, N.D.,Chary, P.2006.Ecomorphometric Marker Reflect Variation in Azadirachtin Contents of Azadirachta indica A. Juss. (Meliaceae) in Select Regions of Andhra Pradesh India. Curr. Sci, 91:628 – 636.Adel, M.M., Sehnal, H., Jurzysta, M. 2000. Effects of Alfalfa safonin on the Moth Spodoptera litura Journal of Chemical Ecology, 26 : 7-14Shuklar, Y.N., Rani, A. Tripathi,A.K., Sharma, S. 1996. Antifeedant, Activity of Ursolic Acid Isolation from Duboisia myoporoides Phytotheraphy, 10 : 359 – 360Walter, J.F. 1999. Commercial With Neem Product, P. 155-170. In Franklin R, Hall and Julius J. Menn. Biopesticides Use and Delivery. Humana Press. Totowo, New Jersey. 
DEVELOPING WEB MAPPING APPLICATION USING ARCGIS SERVER WEB APPLICATION DEVELOPMEN FRAMEWORK (ADF) FOR GEOSPATIAL DATA GENERATED DURING REHABILITATION AND RECONSTRUCTION PROCESS OF POST-TSUNAMI 2004 DISASTER IN ACEH Nizamuddin Nizamuddin
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

ESRI ArcGIS Server is equipped with ArcGIS Server Web Application Development Framework (ADF) and ArcGIS Web Controls integration for Visual Studio.NET. Both the ArcGIS Server Manager for .NET and ArcGIS Web Controls can be easily utilized for developing the ASP.NET based ESRI Web mapping application. In  this study we implemented both tools for developing the ASP.NET based ESRI Web mapping application for geospatial data generated dring rehabilitation and reconstruction process of post-tsunami 2004 disaster in Aceh province. Rehabilitation and reconstruction process has produced a tremendous amount of geospatial data. This method was chosen in this study because in the process of developing  a web mapping application, one can easily and quickly create Mapping Services of huge geospatial data and also develop Web mapping application without writing any code. However, when utilizing Visual Studio.NET 2008, one needs to have some coding ability.
The removal of remazol brilliant blue dyes from liquid waste using nano montmorillonite from bentonite of Bener Meriah Aceh JULINAWATI JULINAWATI; FATHURRAHMI FATHURRAHMI; IRFAN MUSTAFA; DETA RAHMADANTI
Jurnal Natural Volume 22 Number 2, June 2022
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (704.213 KB) | DOI: 10.24815/jn.v22i2.24394

Abstract

Research on the potential of nano montmorillonite as an adsorbent for Remazol Brilliant Blue dye waste has been carried out. Nano montmorillonite was isolated from Bener Meriah bentonite, Aceh, to be used as an adsorbent. The optimum conditions for adsorption of Remazol Brilliant Blue dye using nano montmorillonite occurred at a contact time of 60 minutes, pH 4, and adsorbent mass of 2 grams. The results showed that the adsorption of Remazol Brilliant Blue dye by nano montmorillonite followed the Freundlich isotherm model with R2 = 0.9858. The results of the regeneration test show that the montmorillonite nano adsorbent can be used repeatedly
ANALYSIS OF SHALLOW SUBSURFACE AT HYDROCARBON POTENTIAL AREAS IN NORTH ACEH BASED ON ELECTRICAL RESISTIVITY MODEL Nurul Aflah; Muchlis Muchlis; Syafrizal Idris; Witan O Ardjakusumah
Jurnal Natural Volume 18, Number 3, October 2018
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (754.764 KB) | DOI: 10.24815/jn.v18i3.12170

Abstract

Hydrocarbon prospect area research has been done in North Aceh at two locations. The research aims to analyze subsurface litology using  resistivity method. Data acquisition of each location was presented by 330 m line survey. The acquisition process was generated by Super Sting R8/IP and modelled by EarthImager 2D. Oil and gas (NA1) resistivity section showed anomaly at 170 m (x) and 17 m (z) that was identified as minor fault. However, oil seepage was not founded on the location. Fossil locality (NA2) section showed a contrast vertical anomaly (16-90 Ωm) around 90 – 120 m that was identified as a way for the seepage.

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