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All Journal Jurnal Teknik Industri IPTEKMA Buletin Udayana Mengabdi Itepa : Jurnal Ilmu dan Teknologi Pangan Media Ilmiah Teknologi Pangan (Scientific Journal of Food Technology) agriTECH CARADDE: Jurnal Pengabdian Kepada Masyarakat Jurnal Sains dan Teknologi Pertanian Agroindustrial Journal Journal of Fibers and Polymer Composites JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Jurnal Ilmiah Teknologi Pertanian Agrotechno
Bambang Admadi Harsojuwono
Program Studi Teknologi Industri Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences

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Aktivitas Antibakteri Propionibacterium acnes Ekstrak Bunga Kenanga (Cananga odorata) Terhadap Variasi Jenis Pelarut dan Waktu Maserasi Sinaga, Reni; Anggreni, Anak Agung Made Dewi; Harsojuwono, Bambang Admadi
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 3 (2024): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i03.p06

Abstract

Ylang ylang flower is one of the natural sources that contain antibacterial compounds. One of the bacterial infections on the skin surface is acne and is aggravated by the existence of Propionibacterium acnes bacteria. This experiment aims to determine the effect of solvent type and maceration time on the effectiveness of ylang flower extract in inhibiting P.acnes bacteria, and to determine the combination of solvent type and maceration time that produces ylang flower extract with the best antibacterial activity. This experiment used Factorial Randomised Group Design (RAK) with two factors. The first factor is the solvent type which includes ethanol, methanol, and n-hexane. The second factor is maceration time which includes 24, 48, and 72 hours. The variables observed in this study included yield, total phenol, and the highest antibacterial activity. The obtained data were then analysed with analysis of variance (ANOVA), then continued with Duncan's test. The results of this study showed that the type of solvent and maceration time significantly affected the yield, total phenol, and antibacterial activity on P.acnes test bacteria. The interaction between treatments had a significant effect on yield but no significance on total phenol and antibacterial activity on P.acnes test bacteria. The best solvent type that can produce kenanga flower extract with the highest antibacterial activity is methanol with an inhibition zone of 8.48 ± 1.66 mm, with yield of 5.03 ± 0.10% and total phenol of 43.04 ± 0.81 mg GAE/g. The best maceration time that can produce kenanga flower extract with the highest antibacterial activity is 48 hours with an inhibition zone of 5.35 ± 0.79 mm, with yield of 5.03 ± 0.10% and total phenols of 31.69 ± 1.27 mg GAE/g.
Karakteristik Komposit Biotermoplastik Dari Pati Termoplastik/Glukomanan Termoplastik/Poliasam Laktat Dalam Variasi Jenis dan Konsentrasi Compatibilizer Saragih, Ruth Natasya Octaviani; Harsojuwono, Bambang Admadi; Suhendra, Lutfi; Amna , Amna; Suhartini, Sri
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 3 (2024): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i03.p12

Abstract

Biotermoplastic is a one of the innovation to improve the physical and mechanical properties of bioplastics. This study aims to determine the effect of the type and concentration of compatibilizer on the characteristics of biothermoplastic composites and to determine the type and concentration of the right compatibilizer to produce the best characteristics of biothermoplastic composites of thermoplastic starch/thermoplastic glucomannan/polylactic acid (TPS/TPG/PLA). This research utilizes a Completely Randomized Design (CRD) with 6 treatments, namely J1KI (maleic acid anhydride 5%), J1K2 (maleic acid anhydride 7,5%), J1K2 (maleic acid anhydride 10%), J2K1 (stearic acid 5%), J2K2 (stearic acid 7,5%), and J2K3 (stearic acid 10%), with 3 replications. The variables observed in this study were tensile strength, elongation at break, elasticity, swelling, density, melting point and biodegradation time. The data were analyzed by analysis of variance (ANOVA) and further tested using the Honestly Significant Difference (HSD) test. The results showed that the type and concentration of compatibilizer had a very significant effect on the values ​​of tensile strength, elongation at break, elasticity, swelling, density, melting point and biodegradation time. The best characteristics of biothermoplastic composites of thermoplastic starch/thermoplastic glucomannan/polylactic acid were obtained by using 10% anhydrous maleic acid compatibilizer with a tensile strength value of 30.43 MPa, an elongation at break of 0.90%, elasticity of 3.38 GPa, swelling of 0.51%, density of 1.52 g/cm3, melting point of 149.77oC and biodegradation time of 17.667 days.
Karakteristik Komposit Biotermoplastik Dalam Variasi Formulasi Pati Termoplastis, Glukomanan Termoplastis dan Poli Asam Lakta Harianja, Berkat; Harsojuwono, Bambang Admadi; Triani, I Gusti Ayu Lani; Hartiati, Amna; Suhartini, Sri
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 3 (2024): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i03.p15

Abstract

Determination of biothermoplastic composite formulation is essential to produce the best biothermoplastic composite characteristics and meet the standards. This study seeks to identify the characteristics of the best biothermoplastic composites in variations of thermoplastic starch formulations, thermoplastic glucomannan and polylactic acid. This study used a Completely Randomized Design (CRD) with 5 treatments of TPS/TPG formulas with PLA, namely 90:10, 80:20, 70:30, 60:40, 50:50. There were 4 repetitions of each treatment, for a total of 20 experimental units. The variables observed were tensile strength, elasticity, elongation at break, melting point, biodegradation, swelling and density. The diversity analysis showed that the formulation of thermoplastic starch-thermoplastic glucomannan and polylactic acid had a very significant effect on the tensile strength, elasticity, elongation at break, melting point, biodegradation, swelling and density of biothermoplastic composites. Biothermoplastic composites with the formulation of TPS/TPG: PLA = 50:50 produced the best characteristics with a tensile strength of 26.71 MPa, elasticity of 932.04 MPa, elongation at break of 2.89%, biodegradation of 15.25 days, melting point of 152.65oC, density of 1.26 g/cm3 and swelling of 1.32%.
Karakteristik Komposit Biotermoplastik Berbasis Pati Termoplastis/ Glukomanan Termoplastis/Poli Asam Laktat Dalam Variasi Jenis dan Konsentrasi Filler Siringo-Ringo , Putri Agnesia; Harsojuwono, Bambang Admadi; Suwariani, Ni Putu; Hartiati, Amna; Hartiati, Sri
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 4 (2024): Desember
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i04.p05

Abstract

Biothermoplastic composites are eco-friendly materials that degrade more quickly. These composites are a mixture of biologically-based polymers that melt when heated and solidify when cooled, making them a potential solution for sustainable packaging materials. This study aims to determine the effect of various types and concentrations of fillers on the characteristics of biothermoplastic composites, as well as to identify the combination of filler type and concentration that produces the best characteristics in thermoplastic starch/thermoplastic glucomannan/polylactic acid (TPS/TPG/PLA) composites. The research used a Completely Randomized Design (CRD) factorial with the first factor being the type of filler (J), namely ZnO, Clay, and CaCO₃, while the second factor was the filler concentration (K), which was 5%, 7.5%, and 10% of the matrix material. Therefore, there were 9 treatment combinations, each repeated twice. The variables observed in this study were tensile strength, elongation at break, elasticity (Young's modulus), swelling, density, melting point, and biodegradation time. The data obtained were analyzed using variance analysis and followed by the Honest Significant Difference (HSD) test. The results showed that the type and concentration of filler had a significant influence on tensile strength, elongation at break, elasticity, swelling, density, melting point, and biodegradation time. The best biothermoplastic composite was obtained using 10% clay filler, with a tensile strength of 41.88 MPa, elongation at break of 0.68%, elasticity of 6.16 GPa, swelling of 0.48%, density of 1.01 g/cm³, a melting point of 170.05°C, and a biodegradation time of 24.5 days. The characteristics of the TPS/TPG/PLA biothermoplastic composite mostly meet SNI and international standards, except for elongation at break.
Karakterisasi Papan Partikel Dari Kulit Buah Kakao (Theobroma cacao L.) Dalam Variasi Jenis Dan Konsentrasi Perekat Hugo, Harbert; Harsojuwono, Bambang Admadi; Suwariani , Ni Putu
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 13 No 1 (2025): Maret
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2025.v13.i01.p04

Abstract

Particle board is an artificial board created by combining lignocellulosic chips/particles using pressed synthetic adhesive to obtain characteristics similar to solid wood. This research aims to determine the effect of the types and concentrations of adhesive that produces the best particle board characteristics. This research used a Randomized Block Design (RBD) with treatment variations between types of adhesive, namely PVAc, epoxy, and urea formaldehyde, as well as adhesive concentration levels consisting of 50%, 55%, 60%, and 65%, with a total of 12 combinations. Each treatment was grouped into 2 based on the time the particle board was made to obtain 24 experimental units. The variables observed were physical properties which included: density, water content, water absorption capacity, and thickness expansion, then mechanical properties which included: modulus of elasticity, modulus of rupture, internal bonding, and screw holding strength. The data obtained was analyzed for diversity and continued with the Honestly Significant Difference Test (HSD). The research results showed that the types and concentrations of adhesive had a very significant effect on water absorption capacity, thickness expansion, MOR, MOE, internal bonding, screw holding strength, had a significant effect on water content, and had no significant effect on density. Applying a 65% concentration of PVAc adhesive results in properties that fulfill most of the test criteria outlined in SNI 03-2105-2006 regarding particle boards, with a density value of 0.83 g/cm3, water content 12.81%, water absorption capacity 10.97%, thickness expansion 1.25%, MOR 33.38 kg/cm2, MOE 1490.83 kg/cm2, internal bonding 4.68 kg/cm2, and screw holding strength 4.85 kgf.
Analisis Produktivitas Produksi Kerupuk Kulit Ikan Tuna UD. Putra Susila Menggunakan Objective Matrix (OMAX) Simanjuntak, Debby Margareth; Satriawan, I Ketut; Harsojuwono, Bambang Admadi
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 13 No 1 (2025): Maret
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2025.v13.i01.p06

Abstract

UD. Putra Susila tuna fish skin crackers specializes in producing tuna fish skin. In its activities, it is constrained by fluctuations in the supply of tuna fish skin raw materials which depend on the season, thus affecting overall productivity. The study aims to measure the value of productivity, analyze the value of cracker production ratio and develop recommendations for improving the value or target productivity of tuna fish skin crackers production at UD. Putra Susila from July to December 2023. The method used to measure company productivity is Objective Matrix (OMAX). There are 4 ratios that are adjusted to the company's conditions using efficiency criteria. The highest peak of the productivity value of tuna fish skin crackers production was in August 2023 with a productivity index value of 489.9%, the lowest value is in November 2023 at 175%. Analysis of the productivity ratio of tuna fish skin crackers gets the highest value in ratio 2 (the ratio of LPG gas usage costs to product value) at 495.64%, while the lowest productivity value was in ratio 4 (the ratio of the number of employees to product value) at 360.87%. Productivity improvement proposals that can be given are reducing employee working hours to 95 hours, saving LPG gas to Rp 4,130,429.76, optimizing raw materials to Rp 8,702,896.77, and maintaining the number of production employees as many as 7 people
Strategi Peningkatan Kualitas Produk Ayam Geprek Rumah Makan Geprek Samsi di Kota Mataram Nusa Tenggara Barat Safari, Muhammad Ilham; Yuarini, Dewa Ayu Anom; Harsojuwono, Bambang Admadi
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 13 No 1 (2025): Maret
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2025.v13.i01.p08

Abstract

The sales of Smashed Chicken at Geprek Samsi Restaurant have remained stagnant since its establishment in 2018, with an average of 50 portions sold per day. The owner aims to increase sales to 100 portions per day. One of the main challenges in increasing sales is the high level of competition, with many food stalls and restaurants offering similar smashed chicken menus. This research aims to identify important attributes for consumers, determine the level of importance and consumer satisfaction with the quality of smashed chicken, and formulate strategies to improve product quality at Geprek Samsi Restaurant. The research method used is Quality Function Deployment (QFD) to analyze the most important product attributes for consumers. The analysis results show that the most important attributes are the taste of smashed chicken (4.58), fried chicken crispiness (4.53), smashed chicken texture (4.16), and portion size (4.08). Meanwhile, consumer satisfaction highlights that sambal variation, presentation appearance, and menu pricing are the main aspects to improve, with the highest improvement ratios being 1.35 for sambal variation, 1.30 for presentation, and 1.28 for menu price. The proposed quality improvement strategies include developing sambal variations by introducing new sambal types such as green chili sambal, shrimp paste sambal, and sambal matah. Furthermore, enhancing presentation consistency and aesthetics of the menu components is recommended. Price adjustments should also be considered to make the menu more competitive. From a technical perspective, the focus is on the process of crushing crispy chicken, frying the chicken, as well as sambal preparation and presentation, which are deemed to significantly impact product quality improvement.
Co-Authors Aditya Nandika A.J Amna , Amna Amna Hartiati Amna Hartiati Anak Agung Made Dewi Anggreni Anak Agung Made Dewi Anggreni ANAK AGUNG MADE DEWI ANGGRENI Aryawan, I Komang Budi Mas Boy Darwin Situmorang Cintia Indrawati Devi Hagelia Aritonang DEWA AYU ANOM YUARINI Dewa Made Dwi Pradana Putra Dewi Sartika Esmeralda Oktaviani Simarmata Farida Unggul Situmorang Fransiskus Yuven Wara Gusti Ayu Kadek Diah Puspawati Harianja, Berkat Hartiati , Amna Hartiati, Sri Hugo, Harbert I Dewa Gde Mayun Permana I Gusti Ayu Lani Triani I Gusti Made Teddy Pradana I Gusti Ngurah Agung I Kadek Alit Susendiana Adi I Ketut Pramananta I Ketut Satriawan I Ketut Suter I Made Prahadi Widnata Putra I Made Sugitha I Nengah Kencana Putra I Pt Cahya Wisnawa P I W.G. SEDANA YOGA I Wayan Angga Sukma I Wayan Arnata Ida Bagus Wayan Gunam Ketut Anik Mas Juliani Liza Natasya Pongmassangka Luh Gede Arista Pradnyani Lutfi Suhendra M. Surya Pramana Mahardika M. SURYA PRAMANA MAHARDIKA, M. SURYA Mulyani Sri N.L. Yulianti Nairfana, Ihlana Natasya Damariandini Ni Kadek Ariani Dewi Ni Kadek Sriani Ni Ketut Wiradnyani Ni Luh Feby Putri Pratami Ni Made Wartini Ni Putu Suwariani Ni Wayan Nadia Martaningsih Sutarsa Noval Wahyu Adi NYOMAN SEMADI ANTARA Pande Made Kerta Indra Yoga Patandianan, Dimas Lomo Pupung Ferdiansyah Purba, Dillon Marichman Putra, Ferdi Prayoga Putu Devi Yustisia Utami Radja Zulfan Hasibuan Runa Ramadanty Aisyi Putri Safari, Muhammad Ilham Sando F. Limbong Saragih, Ruth Natasya Octaviani Sayi Hatiningsih Shafira Salsabila Putri Simanjuntak, Debby Margareth Sinaga, Reni Siringo-Ringo , Putri Agnesia Sri Mulyani Sri Mulyani Sri Suhartini Suwariani , Ni Putu Suwariani, Ni Putu Syah Banu Putra Sitepu Tiara Noviyani Timothy Ich Sudanton Sitorus Viva Yani Tika Rutmana Simamora Vudia Miranda Wijaya Saputra Yohana Putri Lumbantoruan