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Jurnal Riset Teknologi Industri

jrti
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Published by Balai Riset dan Standardisasi Industri Samarinda

ISSN : 19786891 EISSN : 25415905 DOI : 10.26578

Core Subject : Agriculture, Social, Engineering,

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

Jurnal Riset Teknologi Industri (JRTI) adalah jurnal ilmiah yang terbit secara berkala dua kali setahun pada bulan Juni dan Desember. Memuat informasi bidang riset Teknologi Industri berupa hasil riset dan Ulasan Ilmiah bidang Perekayasaan Mesin, Pangan, Kimia Industri, Lingkungan dan Teknik Industri. Akreditasi Kemenristekdikti Akreditasi S2 Vol.10 No.1 Tahun 2016 samapi dengan Vol.14 No.2 tahun 2020. p-ISSN : 1978-6891, e-ISSN : 2541-5905.

Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)

Articles 306 Documents

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Evaluasi Sifat Fisik, Kimia serta Penerimaan Organoleptik Minuman Serbuk Instan Berbasis Tepung Pisang Matang sebagai Alternatif Makanan Sarapan Achmat Sarifudin; Riyanti Ekafitri; Diki Nanang Surahman; Novita Indrianti
Jurnal Riset Teknologi Industri Vol 10 No 1 Juni 2016
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Ripe banana flour is potential to be used as snack food or breakfast meals ingredients. This research was aimed to evaluate the instaneous ready to drink ripe banana flour based product including its physcochemical properties and also its sensory acceptance. The product was processed according these following steps: ripe banana flour preparation, banana flakes processing and lastly mixing all ingredients inwhich 30% of ingredients is mix of ripe banana flour and banana flakes with ratio 1:5, 1:2 and 1:1. Result showed that lower banana flake ratio used in the formulation tended to lower the protein and fat content with amount of 1,24-1,77% and 1,15-1,65%, respectively, meanwhile the fiber content increased with range of 0,32-1,30%. This product can be an alternative as breakfast meal with calory value range from 381,71-384,82 kkal/100 gr. The less banana flake used in formulation the less bulk density resulted (0,7-0,73 gr/ml). During short period storage the viscosity of the products were increased with range about 15,45-18,04 cp. Instaneous ready to drink ripe banana flour obtained moderate acceptance from panelist. The best product was a formula which used mix of ripe banana flour and banana flakes 1:2, with the highest overall revenue value (4.87). As an alternative snack or breakfast meals, this formula gives energy of 161.62 kcal per 42 gram product.ABSTRAKPada penelitian ini dibuat minuman serbuk instan berbasis tepung pisang matang sebagai makanan selingan atau alternatif makanan sarapan. Penelitian ini bertujuan untuk mengevaluasi sifat fisik, kimia serta penerimaan organoleptik minuman serbuk instan berbasis tepung pisang matang. Produk dibuat dengan tahapan : pembuatan tepung pisang matang, flake pisang, dan minuman serbuk berbasis tepung pisang matang yang 30% formulanya berupa campuran tepung pisang matang dan flake pisang. Perlakuan perbandingan tepung pisang dengan flake pisang 1:5, 1:2, dan 1:1 dianalisa dengan analisa yang meliputi analisa sifat kimia, fisik, dan organoleptik. Hasil penelitian menunjukkan bahwa semakin sedikit penggunaan flake pisang, kadar protein (1,24-1,77%) dan lemak semakin menurun (1,15-1,65%), sedangkan kandungan serat semakin meningkat (0,32-1,30%). Produk ini dapat menjadi alternatif makanan sarapan dengan nilai kalori yang tidak kurang dari 300 kkal (381,71-384,82 kkal/100 gr). Semakin sedikit penggunaan flake pisang nilai densitas kamba semakin menurun (0,7-0,73 gr/ml) dan viskositas setelah dibiarkan pada suhu ruang 25oC semakin meningkat (15,45-18,04 cp). Minuman sebuk instan ini diterima dengan nilai penerimaan keseluruhan berkisar antara 4,50-4,87 yang artinya netral dan agak disukai. Produk terbaik adalah produk dengan nilai penerimaan over all tertinggi (4,87) yaitu formula dengan campuran tepung pisang dan flake pisang 1:2. Sebagai makanan selingan atau alternatif makanan sarapan, formula ini memberikan energi sebesar 161,62 Kkal per 42 gram produk. Kata kunci : tepung pisang, minuman serbuk instan, makanan sarapan

Mikroflora Jamur Produk Kakao Kering Serta Kemungkinan Penghambatan Jamur Penghasil Toksin oleh Bakteri Asam Laktat dan Bacillus Spp. Anton Rahmadi
Jurnal Riset Teknologi Industri Vol 2 No 3 Juni 2008
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Mycotoxins contamination in sun dried cocoa has become a concern in public health but it has not been studied thoroughly yet. This research aimed to understand the ecology of fungal contamination in relation to the occurrence of toxigenic metabolites in Indonesian and Australian fermented cocoa. The beans were surface disinfected with 0.4% chlorine prior to deposite onto Dichloran 18 % Glycerol Agar (DG-18. OXOID). Total fungal count was obtained from serial dilutions on DG-18 medium. Streaking onto Dichioten Rose Bengal Chloramphenicol Agar (DRBC, OXOID) purified a specific mould colony. Simultaneously. Aspergillus sec. Flavi colonies were confirmed using Aspergillus Flavus Parasiticus Agar (AFPA. OXOID). The confirmatory test was mainly based on morphological examinalion under phase contrastmicroscope. Fungal population in Indonesian beans varied belween 10’4 – 105cfu/g, while the populations on Queensland beans were consistently low (<100- 2.5 x 102 cfu/g). However. there was a high incidence of potentiallymycotoxiqenic filamentous fungi on all bean samples. The main species wereAspergillus flavus, Aspergillus niger. Aspergillus wentii. Aspergillus clavatus. Penicillium citrinum, and Penicillium spinolosum. The beans from Queensland gave high counts of Bacillus species and lactic acid bacteria and it is suggested that they served as natural biocontrol againts against the filamentous fungi.

Pengaruh Penambahan Serat Sabut Kelapa terhadap Pembuatan Beton “Knock Down” Petrus Patandung
Jurnal Riset Teknologi Industri Vol 11 No.1 JUNI 2017
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Research the influence of coconut fiber addition to the manufacture of concrete knock down as building materials. The purpose of this study to determine the effect of coconut fiber addition to the making of knock down concrete. This research uses experimental design of knock down in the form of Figures and Graphs and the collection is analyzed descriptively with the addition of coconut fiber treatment consisting of: 50; 100; 150; 200; 250 and 300 g, the properties and advantages of coconut fiber are: resistant to water, microorganisms, weathering and also to mechanical workmanship that is friction and punch. Each treatment was repeated 3 (three) times. The results showed that the addition of coconut fiber was the very significant effect on water absorption and compressive strength. The results showed that the average water absorption was 4.51 - 8.25% and the average compressive strength was 173,49 - 209,34 kg / cm2. For the compressive strength direction, treatment D is the optimal addition of coconut fiber because it provides the highest compressive strength value of 209.34 kg / cm2, while the E and F treatment of the compressive strength decreases. The results showed that the best treatment was obtained in treatment A; B; C; D and E can meet the quality requirement of knock down concrete because the compressive strength can reach 175 kg / cm2 and can be used for wall concrete. Keywords : knock down, coir, compressive strength, absorptionABSTRAK Penelitian pengaruh penambahan serat sabut kelapa terhadap pembuatan beton knock down sebagai bahan bangunan. Tujuan penelitian ini untuk mengetahui pengaruh penambahan serat sabut kelapa terhadap pembuatan beton knock down. Penelitian ini menggunakan desain percobaan pembuatan knock down dalam bentuk gambar dan grafik serta data dianalisis secara deskriptif dengan perlakuan penambahan serat sabut kelapa yang terdiri dari: 50; 100; 150; 200; 250 dan 300 g, sifat dan keunggulan dari serat sabut kelapa yaitu: tahan terhadap air, mikroorganisme, pelapukan dan juga terhadap pengerjaan mekanis yaitu gesekan dan pukulan. Masing–masing perlakuan diulang 3 (tiga) kali. Hasil analisis menunjukkan bahwa perlakuan penambahan serat sabut kelapa memberikan pengaruh sangat nyata terhadap penyerapan air dan kuat tekan. Hasil penelitian menunjukkan bahwa hasil penyerapan air rata-rata 4,51 - 8,25 % dan kuat tekan rata-rata 173,49 - 209,34 kg/cm2. Untuk parameter kuat tekan, perlakuan D merupakan penambahan serat sabut kelapa yang optimum karena memberikan nilai kuat tekan tertinggi yaitu 209,34 kg/cm2, sedangkan perlakuan E dan F nilai kuat tekannya semakin menurun. Hasil menunjukkan bahwa perlakuan yang terbaik diperoleh pada perlakuan A; B; C; D dan E dapat memenuhi syarat mutu beton knok down karena kuat tekannya dapat mencapai 175 kg/cm2 dan dapat dimanfaatkan untuk beton dinding.Kata kunci: knock down, serat sabut kelapa, kekuatan tekan, penyerapan

Pemanfaatan Limbah Tandan Kosong Kelapa Sawit (Tkks) untuk Produksi Etanol Eldha Sampepana; Paluphy Eka Yustini; Titik Nurwidawati
Jurnal Riset Teknologi Industri Vol 6 No 12 Desember 2012
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Palm oil empty fruit bunches (EFB) waste contains ±45% cellulose which can be hydrolyzed into simple sugars using hydrochloric acid (HCl) and fermented into ethanol. The objective of this study was to determine the optimum HCl concentration and hydrolysis time for ethanol production. HCl concentration level used was 2N and 3N, and the variation of hydrolysis time period was 2 hourse and 3 hourse. The hydrolysis product was then fermented using Saccharomyces cerevisae. The results showed that the optimum condition of EFB hydrolysis was obtained from concentration 3N HCl during 2 hourse process with 16,34% of reducing sugar. The optimum ethanol content was 0.30% which was abtainst after 3 day process. Mean while the optimum of carbon dioxide (CO2) was reached on the three day.

Metode Pemecahan Emulsi Krim Santan untuk Produksi Konsentrat Protein Blondo Mariati Edam; Nova Kumolontang; Judith Mandei
Jurnal Riset Teknologi Industri Vol.13 No.2 Desember 2019
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Blondo adalah protein yang terbentuk pada proses ekstraksi untuk mendapatkan minyak dengan proses basah dari krim kelapa. Blondo merupakan hasil samping dari pembuatan VCO dan minyak kelapa yang belum dimanfaatkan secara optimal. Aplikasi protein nabati pada produk pangan digunakan sebagai bahan fungional yang dapat mempertahankan, memperbaiki dan meningkatkan tekstur, stabilitas, serta mengatur sifat-sifat produk pangan dan merupakan unsur gizi. Nilai ekonomi dan fungsional blondo dapat ditingkatkan dengan mengolah lanjut menjadi konsentrat protein blondo. Penelitian ini bertujuan untuk menganalisis pengaruh metode pemecahan emulsi krim santan terhadap karakteristik kimia konsentrat protein blondo. Metode penelitian menggunakan metode eksperimental dengan rancangan percobaan yaitu menggunanakan Rancangan Acak Lengkap (RAL) dengan perlakuan metode pemecahan emulsi yaitu fisik, kimia dan fermentasi sebanyak tiga kali ulangan. Parameter yang dianalisis yaitu kadar protein, lemak, air dan abu. Hasil analisis konsentrat protein blondo yaitu kadar protein (78.21-82.76%), kadar lemak (0.75-0.85%), air (4.9-4.94%) dan abu (2.30-2.38%). Metode pemecahan emulsi berpengaruh terhadap kadar protein, kadar lemak, kadar abu dan tidak berpengaruh terhadap kadar air dari konsentrat protein blondo yang dihasilkan. Konsentrat protein blondo menggunakan metode fermentasi adalah yang terbaik dengan karakteristik sebagai berikut: kadar protein 82.76%, lemak 0.75%, air 4.93% dan abu 2.30%.

Desain dan Pembuatan Perkakas untuk Proses Friction Stir Welding pada Material Aluminium 5052 Tarmizi Tarmizi; Odi Buana Hutapea
Jurnal Riset Teknologi Industri Vol 9 No 2 Desember 2015
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Friction Stir Welding is a process of joining metals without filler and without melting the base metal. The system uses the work of the FSW tool with a rotating cylindrical indenter to heat with friction material. Making tools for FSW process includes the selection of materials, testing the chemical composition, microstructure, tool design, heat treatment process on the tool, and testing tools. Materials used tool steel AISI H13 or SKD 61. This steel has a combination of strength, wear resistance, and excellent toughness. The shape of the pin tool is to use triangles, cylinders, and cones. Tool is heated at a temperature of 1100oC on hold for 30 minutes, cooled in oil. Then the material is heated at a temperature of 450oC back on hold 30 minutes, cooled in the furnace has been turned off. Hardness test results produced after heat treatment at 52.8 HRC. The microstructure after heat treatment are carbide and martensite phase. In the experiments showed that the optimum welding on cylindrical shape with a visual tool welds excellent.ABSTRAKPengelasan aduk friksi (Friction Stir Welding) merupakan proses penyambungan logam tanpa logam pengisi dan tanpa melelehkan logam induk. Sistem kerja dari FSW menggunakan peralatan silindris yang berputar (rotating cylindrical tool) dengan indentor untuk memanaskan material dengan gesekan. Pembuatan peralatan untuk proses FSW ini meliputi pemilihan bahan material, pengujian komposisi kimia, struktur mikro, mendesain perkakas, proses perlakuan panas pada perkakas, dan pengujian pada perkakas. Material perkakas yang digunakan baja AISI H13 atau SKD 61. Baja ini memiliki kombinasi kekuatan, ketahanan aus, dan ketangguhan yang sangat baik. Bentuk pin perkakas yang gunakan ialah segitiga, silinder, dan kerucut. Perkakas dipanaskan pada temperatur 1100oC ditahan selama 30 menit, didinginkan di oli. Kemudian material dipanaskan kembali pada temperatur 450oC ditahan 30 menit, didinginkan dalam tungku yang telah dimatikan. Hasil uji kekerasan yang dihasilkan setelah perlakuan panas sebesar 52,8 HRC. Struktur mikro setelah perlakuan panas terdapat karbida dan fasa martensit. Pada percobaan pengelasan didapatkan hasil yang optimum pada bentuk peralatan silinder dengan visual lasan yang sangat baik. Kata kunci : Perkakas FSW, baja perkakas AISI H13, karbida krom

Analisa Sifat Fisikokimia Tanin Kulit Akasia Mangium Untuk Bahan Baku Perekat Eldha Sampepana; Enih Rosarnah
Jurnal Riset Teknologi Industri Vol 4 No 8 Desember 2010
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Tannin is a derivative from organic compound from glycosides found in various plants, the most important commercial condensed tannin oblained from gymnosperms species for example Acacia mangium. Tannin is one of the adhesive materials that can have a dimensional stability of wood. Tannin contains flavonoid compounds that have hydroxyl groups that are reactive to condense against other materials as a cross-link agent, like formaldehyde, which may increase the number of polymer units of tannins, thus increasing the bonding strength of tannin based adhesives. Based on the results of physicochemical analysis of extracts (tannins) from the bark of A. mangium as a raw material for adhesives, it can be concluded that the A. mangium tannin had a higher reactivity toward formaldehyde of 96%, reactivity of tannin toward hexamefhylene tetramine of 46.18%, tannins toward ethylene glycol of 3.07% and tannins toward dimethylol urea of 183.59%. Meanwhile, the value of reactive polyphenol content determined by UV-Method showed in tannin with formaldehyde of 97.65%, tannins with hexamethylene tetramine of 46%, tannins with ethylene glycol of 2%, and tannins with dimelhylolurea of 56.26%. The resuits of gelation time (gel time) measurements fullfilled the requirements of JIS K 6833-1980 by the treatment of hexamelhylenen tetramine for variable II and III, and the treatment of ethylene glycol (variable VI). The viscosity values by the Ireatment of hexamethylenen tetramine (variable II, III, and IV), for ethylene glycol (variable II - VI) met the requirement conditions by JIS K 6833-1980.

Analisis Kinerja Reaktor Unggun Tetap untuk Produksi Hidrogen Melalui Reaksi Steam Reforming Etanol Tri Hadi Jatmiko; Dwi Joko Prasetyo; Nurul Abdillah Pulungan
Jurnal Riset Teknologi Industri Vol. 12 No.1 Juni 2018
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Reaktor unggun tetap merupakan jenis reaktor yang banyak digunakan untuk reaksi yang menggunakan katalis padat, salah satunya adalah reaksi steam reforming. Reaksi steam reforming merupakan salah satu proses pembuatan gas hidrogen dari bahan yang mengandung karbon seperti biomassa dan etanol dengan menggunakan katalis yang selanjutnya bisa digunakan sebagai sumber energi alternatif yang ramah terhadap lingkungan maupun sebagai bahan baku kimia. Dalam penelitian ini dilakukan pemodelan dan simulasi reaktor unggun tetap untuk menganalisa kinerja dari reaktor unggun tetap untuk produksi hydrogen dari etanol melalui reaksi steam reforming. Model yang digunakan adalah model pseudohomogen dua dimensi dengan model dispersi, kondisi operasi steady state, adiabatis dan fasa gas mengikuti hukum gas ideal. Dari hasil simulasi didapatkan informasi bahwa kenaikan temperatur dari 593 K hingga 743 K meningkatkan konversi reaksi dari 36,64% menjadi 40,42%. Kenaikan kecepatan superfisal dari 0,63x10-5 hingga 4,23x10-5 m/s menghasilkan konversi reaksi turun dari 82,69% menjadi 27,81%. Perubahan kosentrasi etanol yang dimaskan ke reaktor dari 5,71x10-5 mol/m3 hingga 1,49x10-4 mol/m3 meningkatkan konversi reaksi dari 65,84% hingga 99,41%. Dan kenaikan rasio H2O/C2H5OH dari 3,0 hingga 11,0 meningkatkan konversi reaksi dari 56,74% menjadi 99,20%. Model reaktor unggun tetap untuk reaksi steam reforming etanol dapat digunakan untuk memprediksi kinerja reaktor dengan baik.Kata Kunci: Steam reforming, etanol, hidrogen, reaktor unggun tetap ABSTRACTThe fixed bed reactor is a type of reactor widely used for reactions using solid catalysts, one of which is a steam reforming reaction. Steam reforming reaction is a process of producing hydrogen from carbon-containing materials such as biomass and ethanol, by using a catalyst which can later be used as an alternative energy source that is environmental friendly. In this study, carried out the construction of a mathematical model and simulation of fixed bed reactor for performance analysis of fixed bed reactor for hydrogen production through ethanol steam reforming. The model used is pseudohomogeneous two-dimensional dispersion model, with steady state operating conditions, adiabatic and the gas phase following the ideal gas law. Result from simulation show that rising temperatures from 593 to 743 K increased the conversion reaction from 36,64% to 40,42%. The increase in superficial velocity 0,63x10-5 to 4,23x10-5 m/s decreased conversion reaction from 82,69 to 27,81%. Changes in the concentration of 5,713x10-5 to 1,4913x10-4 mol/m3 increased the conversion reaction from 65,84 to 99,41%. And increasing ratio of H2O / C2H5OH from 3.0 to 11.0 increase conversion reaction of 56,74% into 99,20%. Model fixed bed reactor for ethanol steam reforming can be used to predict the performance of the reactor well.

Isolasi Bakteri Penghasil Lipase dengan Kemampuan Esterase untuk Produksi Metil Ester Arba Susanty; Fitriani Fitriani; Krishna Purnawan Candra
Jurnal Riset Teknologi Industri Vol 7 No 14 Desember 2013
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Lipase (triasilglieserol hidrolase, EC 3.1.1.3) is an enzyme that can hydrolyze mono-and di and tri acylglycerols (TAG) into free fatty acids, glycerol. Lipase has esterase activity that can form between free fatty acid esters with alcohols. Microorganisms that produced lipase spread from molds, yeasts, and bacteria. Four isolates of bacterial lipolytic ( SG_T , SG_Z , DS_T , and DS_Z ) that has the ability esterase for fatty acids from olive oil and methanol have been isolated from typical Indonesian food containing high oil (fried cassava , dodol salak). Media isolation which used are tributyrin agar –tributyrin and tributyrin - olive oil. Fried cassava isolates have a tendency to live in an acidic pH environment , while isolates dodol salak (fruit snake) has a tendency to live at alkaline pH . All isolates showed that the optimum production of lipase (from 0.45 to 0.73 U m ) was achieved in the range of 32 -hour incubation time (room temperature ) . Fried cassava isolates showed the highest esterase activity, which produce the largest methyl ester is 15.303%. This isolates is a potential lipolytic bacterial as a lipase producer for production of fatty acid methyl ester ( FAME ) / enzymatic biodiesel

Analisa Sifat Mekanik dan Struktur Mikro pada Proses Friction Stir Welding Alumunium 5052 Tarmizi Tarmizi; Boy Prayoga
Jurnal Riset Teknologi Industri VOL 10 NO.2 DESEMBER 2016
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Friction stir welding (FSW) is solid state joining technique or the metal didn’t melt when joining process. This method is used the characteristic of the parent metal has not change. This process is widely used for materials, especially aluminum heat treatment usually must be done first before welding, FSW method invented by The Welding Institute W.Thomas from the welding institute (TWI). Friction stir welding process is used to alumunium 5052 T-0 to form butt joint as much as nine plate. Parameter which varied is pin design form with form triangle, cylinder and cone with screw. The next testing which includes the observation radiography test, tensile test, hardnest test and metallography examination. The results of the study that the variation of the form triangle screw, cylinder screw and cone screw cause hardness value and tensile strength increase and a decrease to triangle screw. Of variation this thesis hardness and tensile strength was highest in cylinder screw as big as 38.27 HV and 120.442 MPa.The microstructure results weld tool 2 (pin cylinder screw) produce finer grain structure than the tool 1 (cone with screw) and the tool 3 (triangle screw).ABSTRAK Friction stir welding (FSW) adalah proses penyambungan material dengan kondisi solid state atau logam tidak meleleh saat di lakukan penyambungan. Metoda ini digunakan agar karakteristik dari logam induk tidak banyak berubah. Proses ini banyak digunakan untuk material khususnya alumunium yang biasanya harus di heat treatment terlebih dahulu sebelum dilakukan pengelasan, metoda FSW ditemukan oleh W.Thomas dari The Welding Institute (TWI). Proses FSW dilakukan pada alumunium seri 5052 T0 dengan bentuk sambungan tumpul sebanyak 9 pelat. Paramter yang divariasikan adalah design bentuk pin dengan bentuk segitiga ulir, silinder ulir dan kerucut ulir. Selanjutnya dilakukan pengujian yang meliputi pengamatan uji radiografi, uji tarik, uji kekerasan dan pemeriksaan metalografi. Hasil penelitian bahwa dengan variasi bentuk pin segitiga ulir, silinder ulir dan kerucut ulir menyebabkan nilai kekerasan dan kekuatan tarik meningkat serta terjadi penurunan pada pin segitiga ulir. Hasil kekerasan dan kekuatan tarik tertinggi terdapat pada silinder ulir sebesar 38.27 HV dan 120.442 MPa. Struktur mikro hasil lasan tool 2 (pin silinder ulir) menghasilkan struktur butir yang lebih halus dibandingkan dengan tool 1 (kerucut ulir) dan tool 3 (segitiga ulir).Kata kunci: silinder ulir, segitiga ulir, kerucut ulir

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Home Page

OAI Link

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Contact Name Eldha Sampepana

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Editorial Address Jl. MT. Haryono/ Banggeris No.1, Samarinda 75124 Tel.Fax: (0541) 7771364/ 745431 Whatsapp : 0821 5541 4969

Location Kota samarinda, Kalimantan timur INDONESIA

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Contact Name
Eldha Sampepana

Contact Email
editorjrti@gmail.com

Phone
+625417771364

Journal Mail Official
editorjrti@gmail.com

Editorial Address
Jl. MT. Haryono/ Banggeris No.1, Samarinda 75124 Tel.Fax: (0541) 7771364/ 745431 Whatsapp : 0821 5541 4969

Location
Kota samarinda,

Kalimantan timur

INDONESIA