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Elkawnie
Published by Universitas Islam Negeri Ar-Raniry Banda Aceh
ISSN : 24608912     EISSN : 24608920     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Engineering
Elkawnie is a journal of Integration Science and Technology with Islam. It's covering research and technology in the field of study of Architecture, Biology, Chemistry, Environmental Engineering, ICT, Physical Engineering and other science and technology field. In particular, Elkawnie's journal discusses the development of research and technology in contributing to development as part of Muslim scientists in the academic sphere.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 460 Documents
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Analysis of Vitamin C Level Contained in Mango Gadung (Mangifera indica L) With Varied Retention Time Anjar Purba Asmara
Elkawnie Vol. 2 No. 1 (2016)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v2i1.658

Abstract

This research is aimed to determine the level of vitamin C in the mango Gadung which stored as long as 0 days; 1 day; 2 days; and 3 days. It is used iodimetric titration. Standard iodine solution used as titrant while starch as the indicator. Determination of raw normality iodine standardization carried out by titration of iodine with sodium thiosulphate solution primer. Normality primary sodium thiosulphate solution (0.0125 N) are determined through standardized sodium thiosulphate with potassium dichromate. Levels of vitamin C in the fruit is determined by linear regression analysis were made based on the graph of the vitamin C levels versus volume of iodine standard solution which used in the titration. The curve gives the equation as following: y = 413.8 x – 1.238. Levels of vitamin C of mango Gadung which has varied retention time as follows: 0.26% (0 days); 0.22% (1 day); 0.20% (2 days); and 0.16% (3 days).
Pengaruh Kecepatan Angin Terhadap Evapotranspirasi Berdasarkan Metode Penman Di Kebun Stroberi Purbalingga Nurhayati Nurhayati; Jamrud Aminuddin
Elkawnie Vol. 2 No. 1 (2016)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v2i1.669

Abstract

Penelitian ini merupakan kelanjutan dari penelitian sebelumnya. Penelitian sebelumnya telah berhasil mengukur variabel suhu, kelembaban, dan radiasi surya pada titik pengukuran 07o13’42,5’’ LS dan 109o17’13,2’’ BT di ketinggian 1264 m dpl. Variabel yang akan dihitung dalam penelitian ini adalah evapotranspirasi. Dalam perhitungan evapotranspirasi memerlukan berbagai data dari pengukuran sebelumnya dan data dari klimatologi. Selain itu, nilai kecepatan angin juga diukur untuk mengetahui pengaruhnya terhadap produktivitas buah stroberi. Penelitian ini bertujuan untuk mengetahui pengaruh kecepatan angin dan evapotranspirasi terhadap kualitas buah stroberi. Kecepatan angin diukur secara langsung dengan alat Anemometer dengan rentang waktu 1 jam selama 24 jam. Sedangkan nilai evapotranspirasi dihitung dengan metode Penman menggunakan data-data pendukung yang telah diukur dan diketahui pada penelitian sebelumnya. Selanjutnya, dimodelkan nilai kecepatan angin terhadap waktu serta nilai evapotranspirasi terhadap waktu sebelum dan setelah interpolasi menggunakan Matlab dalam bentuk kurva 2D. Interpolasi digunakan untuk menentukan data-data yang belum terukur diantara data terukur. Nilai kecepatan angin maksimum yang diperoleh adalah 6,9 m/s, sedangkan evapotranspirasi maksimum 12,3 mm/hari dan minimum 9,2 mm/hari. Kecepatan angin memegang peranan penting dalam proses evapotranspirasi. Laju evapotranspirasi sebanding dengan kecepatan angin. Semakin tinggi kecepatan angin maka semakin tinggi nilai evapotranspirasi. Nilai kecepatan angin dan evapotranspirasi berpengaruh terhadap tinggi rendahnya produktivitas buah stroberi di daerah tersebut.
Impact of Boric Acid on Photocatalytic Oxidation T.Muhammad Ashari
Elkawnie Vol. 2 No. 1 (2016)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v2i1.680

Abstract

Greywater reuse is considered as one solution in solving water scarcity problem in the world because it is less contagious and less polluting to environment than the entire municipal wastewater. Greywater is easier to treat and reuse it. One possibility to treat greywater is using constructed wetland followed by an advanced oxidation process such as photocatalytic oxidation. This process removes organic materials in waste water by oxidation via hydroxyl radicals. There was discussion about the effects of the solution inorganic matrix such as borate on the photocatalytic oxidation. Borate a common constituent of greywater was reported to inhibit photocatalytic oxidation. This research tried to determine the effect of boric acid on photocatalytic oxidation spiked with boric acid in concentration of 5 to 200 mg/L using aqueous TetraEGDME solutions. It was found that there is no inhibition of photocatalytic oxidation process when boric acid is present and pH is acidic (about 4-5).
Low Chlorine Residual and Intermittent Flow Lead to Coliforms Presence: A Study Case on Banda Aceh Water Supply System Fathul Mahdariza
Elkawnie Vol. 2 No. 1 (2016)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v2i1.684

Abstract

Even though the water is supplied from Water Treatment Plant 24 hours a day, some consumers of Tirta Daroy Water Supply Company receive water in their taps intermittently. This condition leads to several reported pipe breaks and coliforms presence, as well. Tirta Daroy conducts a quality control activity so called Pamkor on regular basis. This study is conducted to analyse data obtained from this activity during 2014, with the focus on the total coliforms for total 161 sampling connections. The result demonstrates that the coliforms presence is encouraged by the low chlorine residual and intermittent supply. Additional finding shows these two conditions occur mainly at the areas which have long distance to the water treatment plant.
Penerapan Teory Rough Set Untuk Memprediksi Tingkat Kelulusan Siswa Dalam Ujian Nasional Pada SMA Negeri 5 Kota Banda Aceh Andika Prajana
Elkawnie Vol. 2 No. 1 (2016)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v2i1.685

Abstract

Penelitian ini digunakan untuk menetapkan batasan-batasan masalah dan objek yang akan diteliti dengan mengidentifikasi dan mengklasifikasikan kemampuan siswa berdasarkan data nilai siswa. Setelah itu melakukan proses tranformasi data nilai siswa di SMA Negeri 5 Kota Banda Aceh, Provinsi Nanggroe Aceh Darussalam yang terdiri dari rata-rata nilai rapor (UN), nilai Pra UN dan nilai UN. Dan menganalisis data nilai siswa tersebut menggunakan teory rough set, sehingga menemukan sebuah pola atau knowledge yang dapat digunakan untuk memprediksi tingkat kelulusan siswa dalam UN berikutnya.
Rate-Based End-to End Closed Loop Control for ABR Traffic Management Elvina Djalal
Elkawnie Vol. 3 No. 1 (2017)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v3i1.797

Abstract

ATM has one common feature which guarantees its success, namely the possibility to transport any ATM service, irrespective of its characteristics such as the bit rate, its quality requirements or its bursty nature. ATM also has high flexibility in allocate the bandwidth, and thus allows more calls to enter the network. Unfortunately, this advantage has a negative consequences. ATM presents congestion problems in the network as well as in the end terminals. This research describes about congestion control mechanism that will be applied for Available Bit Rate (ABR) Service in ATM networks, namely, the Rate-Based Congestion Control Scheme. This method supports end-to-end closed-loop control and has been indentified as the most appropriate for the support of this service by ATM Forum. ABR Service is a new ATM Service category. This kind of service automatically and dynamically allocates the available bandwidth to users by controlling the traffic flow based on feedback information. The source increases or decreases the source rate of cells transmission based on the information in the feedback Resource Management (RM) cell it receives. This method minimizes the duties of intermediate nodes and the destination node, so it is expected the source will receive the feedback information faster.
Analisis Sifat Kimia dan Fisika dari Maleat Anhidrida Tergrafting pada Polipropilena Terdegradasi Reni Silvia Nasution
Elkawnie Vol. 3 No. 1 (2017)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v3i1.1439

Abstract

Telah dilakukan penelitian tentang analisa sifat kimia dan sifat fisika dari maleat anhidrida tergrafting pada polipropilena terdegradasi (PPd-g-MA). PPd-g-MA yang diperoleh dibuat dengan perbandingan 95 : 3 : 2 (PPd : MA : BPO). Selanjutnya diuji sifat kimia dengan FTIR untuk menunjukkan proses grafting dapat terjadi dan kemudian diuji dengan DTA untuk mengetahui sifat fisika yang dihasilkan. Hasil penelitian menunjukkan terjadi perubahan sifat kimia dan fisika dari PPd-g-MA apabila dibandingkan dengan polipropilena murni. Pada FTIR ditunjukkan dengan munculnya gugus karbonil pada PPd-g-MA sebelum dan sesudah pemurnian berturut-turut pada bilangan gelombang 1712,79 cm-1 dan 1720,50 cm-1 dan gugus alkoksi pada bilangan gelombang 1165,00 cm-1. Perubahan titik leleh pada PPd-g-MA yang ditunjukkan oleh DTA yaitu 150oC.
Desain Senyawa Turunan Karbamat Sebagai Insektisida Baru Menggunakan Metoda In Silico Agus Dwi Ananto; Mudasir Mudasir; Ria Armunanto
Elkawnie Vol. 3 No. 1 (2017)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v3i1.1527

Abstract

Linear equation of QSAR model of insecticidal activity of carbamate derivatives based on atomic charge and hydrofobic, electronic and steric descriptors has been investigated. The descriptors were calculated by semiempirical PM3 method and biological activities of the compound were taken from experiment. The relationship between descriptors and their biological activities was analyzed with multilinear regression analysis.The best linier equation resulted from that analysis is : Log 1/LD 50 = 12,651 + (2,467 qC2) + (2,832 qC4) - (14,089 qC6) - (0,24 qO7) + (0,293 μ) - (0,08 SA (grid)) +(0,041 V)+ (0,141 EH) - (0,303 log P) n = 39 ; r = 0,839 ; adjusted r2 = 0,612 ; SE = 0,355; Fhit/Ftable = 3,443 PRESS=5,188 Based on that model, a new carbamate derivative has been designed which show better predicted activity (log 1/LD50 = 9,79) while the old one (log 1/LD50 = 8,81). This new carbamate insecticide derivative can be synthesized laboratoriccally for the next prove. Key Word:QSAR, Insecticides carbamate, PM3.
The Determination of Lightning Disaster Hazard Index Using Analytical Hierarchy Process Fathul Mahdariza
Elkawnie Vol. 3 No. 2 (2017)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v3i2.1630

Abstract

In order to minimize the losses caused by lightning, a lightning disaster management system is compulsory. It should provide lightning disaster information in an area to get the risk values of lightning strikes. One way is to establish a lightning disaster risk map. The disaster risk map consists of hazard map, vulnerability map and capacity map. However, lightning yet has not been included in the regulation guiding the establishment of risk map for several disasters in Indonesia. This study is conducted to develop a process to determine general hazard index for lightning disaster.
Eksplorasi Bakteri Asam Laktat Kandidat Probiotik Dan Potensinya Dalam Menghambat Bakteri Patogen Rahmiati Rahmiati; Mugi Mumpuni
Elkawnie Vol. 3 No. 2 (2017)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v3i2.1870

Abstract

Penelitian ini bertujuan untuk mendapatkan isolat potensial bakteri asam laktat kandididat probiotik yang mampu menghambat pertumbuhan bakteri patogen. Terdapat 3 tahap dalam penelitian yaitu isolasi, karakterisasi dan uji potensi bakteri asam laktat dalam menghambat bakteri patogen. Sumber isolat bakteri asam laktat diperoleh dari susu fermentasi, sawi fermentasi dan saluran pencernaan ikan. Tiga jenis bakteri patogen yang digunakan meliputi: Eschericia coli, Salmonella thypii dan Sghigella dysentriae. Ketiga jenis bakteri ini mewakili bakteri yang umum menyerang saluran pencernaan. Enam isolat bakteri asam laktat berhasil diisolasi dari 3 jenis sampel berbeda. Isolat tersebut adalah BAL01, BAL02, BAL03, BAL04, BAL05 dan BAL06. Kemampuan antagonis masing – masing isolat berbeda dalam menghambat bakteri patogen. Isolat BAL01 DAN BAL02 mampu menghambat E. coli dengan zona hambat sebesar 9.25 mm. Isolat BAL02 mampu menghambat S. Thypii dengan zona hambat sebesar 8.5 mm. Sedangkan zona hambat terbesar dalam menghambat S. dysentriae ditunjukkan oleh isolat BAL03 yaitu sebesar 11 mm.

Page 25 of 46 | Total Record : 460

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