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All Journal EUGENIA Jurnal Ilmu dan Teknologi Pangan Jurnal Teknologi Pertanian (Agricultural Technology Journal) Jurnal Agroekoteknologi Terapan COCOS
Robert Molenaar
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Agriculture, Biological Sciences & Forestry Computer Science & IT Environmental Science

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KAJIAN ISOTERMI SORPSI AIR DAN FRAKSI AIR TERIKAT KUE PIA KACANG HIJAU ASAL KOTA GORONTALO [Study on Moisture Sorption Isotherm and Bound Water Fractions of Green Beans Taste of Pia Cake from Gorontalo] Jamaluddin, Jamaluddin; Molenaar, Robert; Tooy, Dedie
Jurnal Ilmu dan Teknologi Pangan Vol 2, No 1 (2014)
Publisher : Pascasarjana Unsrat

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The aims of this work were to study the moisture sorption isotherm and find a suitable mathematical model of sorption isotherm of green beans of  Pia cake from Gorontalo. The sortion isotherm curve was determined by conditioning the Pia cake at various water activities (aw) using saturated salt solution at 30 0C. Data of Pia cake water content at equilibrium were then plotted against water activity. The study found that sorption isotherm of green beanstaste Pia cake were sigmoidal in shape and the mathematical model of Hasley was found to be the most appropriate in predicting the sorption isotherm of green beans taste Pia cake tested. Limits of primary, secondary, and tertiary bound water content were found for the green beans taste Pia as 3,69% db (aw = 0,12), 3,69% db – 7,84% db (aw= 0,12 - 0,42), and 7,84% db – 13,30% db(aw= 0,42 - 1)respectively Key words:   Pia cake,  moisture equilibrium content, mathematicalmodelsof sorption isotherm, dan bound water fractions.
MODIFIKASI TEPUNG PISANG “MULU BEBE” (Musa acuminata) INDIGENOUS HALMAHERA UTARA SEBAGAI SUMBER PANGAN PREBIOTIK Lumba, Ronal; Djarkasi, Gregoria; Molenaar, Robert
Jurnal Teknologi Pertanian (Agricultural Technology Journal Vol 8, No 1 (2017): Jurnal Teknologi Pertanian (Teta)
Publisher : Fakultas Pertanian, Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jteta.8.1.2017.16347

Abstract

"Mulu bebe" plantain (Musa acuminata) is a potential tropical fruit commodity in Indonesia, especially in the North Halmahera area where it can be used as part of food diversification. It is orange in color and no study has been done so far regarding physicochemical properties of starch and its resistant starch. This research was aimed to study the physical properties of “Mulu bebe” plantain flour modified through a spontaneous fermentation process combined with heating and cooling to increase the resistant starch content for use as a prebiotic food source. This study was designed as a completely randomized experiment (CRD) having 2 factors and three replications. The first factor is the spontaneous fermentation time consist of 0, 12, 24 and 36 hours and the second factor is without (0 minutes) and with 45 minutes heating. The result of length of fermentation time showed the lactic acid bacteria grow well during 36 hours fermentation, reaching 8,6 log cfu/ ml. Spontaneous fermentation process alone aid no effect on the physicochemical properties of flour produced, but the presence of heating and cooling process was significantly modified the physicochemical properties. Through the process of 36 hours fermentation, followed by heating at a temperature of 121oC for 45 minutes and cooling at 4 °C for 24 hours produced resistant starch content of 48.53% and in vitro starch digestibility 21,94%.
ANALISIS MUTU DAN EKONOMI PENERAPAN PENGEMASAN VAKUM BAWANG DAUN POTONGAN (Allium fistulosum L.) SELAMA PENYIMPANAN Mikael, Florensi Wahyuni; Molenaar, Robert; Lengkey, Lady C. Ch. E.
Jurnal Teknologi Pertanian (Agricultural Technology Journal Vol 11, No 2 (2020): Jurnal Teknologi Pertanian (Agricultural Technology Journal)
Publisher : Fakultas Pertanian, Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jteta.11.2.2020.31487

Abstract

AbstractThis study aimed to analyze leeks packaging and without packaging during storage, and to analyze economical packaging and knowing the number of breakeven points obtained. This study uses an experimental method, and descriptive analysis of data consisting of 2 treatments and 3 replications, namely scallions which are vacuum packed, and leeks without packaging that are stored in a refrigerator with a temperature of 5-10˚C.From the results of research on quality analysis of changes in weight, color and texture showed that the vacuum packaged onions at a storage temperature of 5˚C – 10˚C gave the best results over a 14-day shelf life compared to unpacked leeks which only lasted for a shelf life of 6 days. Weight reduction occurred in the treatment without packaging by 44%. The total fixed cost is Rp.219,625 /Year, the total variable cost is Rp.5,519 per package, with a yearly production of 24,300 packs /Year, to obtain the selling price of vacuum packaging leeks of Rp.6,080 per package, and the break-even analysis results in get is 392 packaging /Year.Keywords : Leeks, Vacuum Packaging, Storage Time
PANEN DAN PASCAPANEN PADI, JADUNG DAN KEDELAI Molenaar, Robert
EUGENIA Vol 26, No 1 (2020)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.26.1.2020.35207

Abstract

Current post-harvest procedures for food crops are lacking, mostly due to the shortage of adequate postharvest facilities and technology, outdated knowledge and skills of the farmers, and lack of awareness of more modern post-harvest handling. Furthermore, farmers have yet to understand and experience the benefits of post-harvest procedures that can increase crop quality. Harvest and post-harvest procedures for food crops are a strategic step in supporting national food security. Post-harvest procedures directly decrease losses, maintain quality, and increase farmer profits and competitiveness. Surveys by Statistics Indonesia (2012) showed that the national conversion rates of Harvested Dry Grain to Milled Dry Grain are 83,26%, while national conversion rates of Milled Dry Grain to rice are 62,47%. This illustrates a national loss potential throughout the conversion chain, estimated to be 40 billion Rupiahs every year. Efforts to improve harvest and post-harvest procedures for foor crops (with good technological support) need to be targeted towards three things (1) reduction of loss; (2) increase of quality and competitiveness (standardize processes and yield quality); (3) increase of farmer welfare. For this reason, the participation of all postharvest stakeholders is required in standardizing the process and yield quality in post-harvest processes.
ANALISIS EKONOMI MESIN PENGERING PADI (ORYZA SATIVA L.) MENGGUNAKAN VERTICAL DRYER AGRINDO TIPE VRD60 DI KELOMPOK TANI HARAPAN BERSAMA DI DESA BIGO SELATAN Paembonan, Fijar Y.; Molenaar, Robert; Rumambi, David P.
Jurnal Teknologi Pertanian (Agricultural Technology Journal Vol 11, No 2 (2020): Jurnal Teknologi Pertanian (Agricultural Technology Journal)
Publisher : Fakultas Pertanian, Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jteta.v11i2.37786

Abstract

AbstractThis study aims to analyze the economy, total costs and economic feasibility of the rice drying process using the VRD60 type AGRINDO vertical dryer in Harapan Bersama Farmer Group in Bigo Selatan Village, Kaidipang District, Bolaang Mongondow Utara Regency, as well as the total cost of the drying process and the economic feasibility of the machine. The results showed the total drying cost of Rp. 126,908/hour. The break even point value or operational break even point of the VRD60 dryer is at an operating level of 443,620 kg/year or the equivalent of Rp140,741,126/year. Analysis of the operational feasibility of the AGRINDO vertical dryer type VRD60 dryer based on the amount of service potential available using a commercial scale calculation basis, the NPV value of Rp. 186,651,936.62, the IRR of 11%, the B/C ratio of 1.07. This condition shows that the dryer is economically feasible. Based on the conditions in the field the machines do not operate in conditions that guarantee sustainability. The sensitivity analysis shows that changes in the variable working hours per year and the price of drying services are very influential on the feasibility of operations with the lowest level being the service price of 1.43 times the total cost of drying services. Keywords: economics analysis. vertical dryer, paddy
PRODUKSI BIOETANOL DARI SINGKONG (Manihot utilissima) DENGAN SKALA LABORATORIUM Jhiro Christian Mailool; Robert . Molenaar; Dedie . Tooy; Ireine A. Longdong
COCOS Vol. 2 No. 1 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i1.729

Abstract

ABSTRACTThis research aims to study techniques bioethanol production from cassava to produce ethanol from cassava and determines the quality of the bioethanol produced by analyzing the ethanol content and pH as well as knowing the yield of bioethanol produced from the process is used. The results have been known to a variety of constraints in the production process from raw material storage, fermentation and distillation that can affect the end result in obtaining bioethanol from cassava. By using 5 kg of cassava feedstock with 3 times distillation process which has produced 215 ml of ethanol to 53% ethanol content and pH 6.902; 185 ml of ethanol to 74% ethanol content and pH 6.927, and 130 ml ethanol with 49% ethanol content and pH 6.573.Keywords: Bioethanol.
UJI TEKNIS TRAKTOR KUBOTA TIPE M9540 PADA PENGOLAHAN LAHAN KERING DI KELURAHAN WAILAN, KOTA TOMOHON Gabriela A. Assa; Ruland Rantung; Robert Molenaar; Daniel P.M. Ludong
COCOS Vol. 5 No. 4 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i4.6586

Abstract

ABSTRACTSoil tillage aims to create physical soil condition suitable for plant growth. It does that by improving soil water and air association as well as water movement in soil. Mechanical soil tillage requires lots of energy; therefore, good tillage practice needs to carefully consider a proper soil condition in order to get the required result. A technical test to Kubota tractor type M9540 with 95 horsepower was done in this research, as it has never been done before in specific soil condition, topography, and climate of the North Sulawesi. The objectives of this research were to measure aspects of effective field capacity and field efficiency, fuel consumption, to calculate tillage cost and tractor Break Even Point. Soil tillage results were also evaluated by measuring soil bulk density, water infiltration and moisture content before and after tillage. The test was done by cultivating the dry land through performing primary and secondary tillage, each was carried out in three replications. The results show that average effective field capacity for first primary tillage was 1.55 m2/second (0.56 ha/hour), second primary tillage was 1.75 m2/second (0.63 ha/hour), and the secondary tillage was 2.72 m2/second (0.98 ha/hour) with average field efficiency was 77.40%, 80.72%, and 56.17% respectively.Total time to complete the first and second primary tillage was 0.11 hour and 0.10 hour, with diesel fuel consumption of 64.17 liters/ha, and 55.44 liters/ha. The secondary tillage required 0.06 hour and fuel consumption of 28.72 liters/ha.The primary and secondary tillage were found to influence the soil moisture content, bulk density, and rate of water infiltration. Tillage basic cost is calculated as Rp.1.765.683 /ha to result a hire charge of Rp. 1.942.251 /ha, and the tractor break-even point was found to be 552 ha/year.Keywords: Tractor, tillage
APLIKASI PEMBELAJARAN PRAKTIS ALAT dan MESIN PERTANIAN BERBASISANDROID Andreas R. Pinontoan; Robert Molenaar; Hildy Wullur
COCOS Vol. 6 No. 11 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i11.8396

Abstract

ABSTRACT Information on agricultural machinery and equipment is required for the development of agricultural technology in Indonesia. Although Indonesia is known as an agricultural country, its agricultural technology is considered less developed compared to many other non-agricultural countries. One reason behind this is the dissemination of information regarding agricultural machinery and equipment still believed asunstructured and fragmented. Advancement in information and communication technology has made easiness for people in accessing information. Android operating system is gaining more and more popularity and its userin Indonesia is growingfast. This research aims to develop an Android based practical learning application on agricultural machinery and equipment. This research was carried out during the month of April 2015 to June 2015 and the resulted application was successfully installed in Android as a 1.8 Mb APK file format. The application was tested on CPU emulator and Andromax smartphone followed by a survey to 16 respondents using questionnaire having 10 questions in it (5 questions for application and 5 other questions for content of application). The respondents, who marked each question with 1=very disagree; 2=disagree; 3=neutral; 4=agree; 5=very agree, consist of 10 university students, 3 university lecturers, 1 representing farmer, 1 consultant in agricultural machinery and equipment, and 1 representingcommon people. Results of the test conclude that this Android application can be implemented as information media to improve awareness of public and university students regarding agricultural machinery and equipment in a quicker and a more efficient way. The application can also help disseminating information regarding agricultural machinery and equipment in a more variety way in order to support the development of agricultural technology in Indonesia.
PEMBUATAN APLIKASI E-COMMERCE PRODUK PERTANIAN BERBASIS CONTENT MANAGEMENT SYSTEM (CMS) Lexi M. Pendong; Robert Molenaar; Hildy Wullur; Herry F. Pinatik
COCOS Vol. 6 No. 11 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i11.8457

Abstract

ABSTRACT With the current technology developments have made changes in all areas, including trade. Various activities can be done easily and quickly, including buying and selling activities. E- commerce is one of the technology in helping the buying and selling activities. Wide range of products are being sold using e-commerce such as clothes, shoes, bags, food up to ticket. The development of e-commerce is also changing so rapidly, the current CMS (Content Management System) began to be considered to be used to build e-commerce because it is easier and faster in providing information.  North Sulawesi is one area that is famous for its agricultural products such as coconut, cloves and processed products such as palm sugar, coconut oil, and others. Making the application of e-commerce is expected to help provide information related to agricultural products as well as simpifiying the buying and selling activities.  This study aims to create a CMS-based web applications and financial transactions (e-commerce). This research is expected to help the community and students in accessing and providing information related to agricultural products rapidly and extensively, as well as simplifying the buying and selling process via the Internet.
KOMPOR BIOMASSA MENGGUNAKAN BAHAN BAKAR KAYU CENGKEH (SYZYGIUM AROMATICUM (L.) MERR) SEBAGAI SUMBER ENERGI Roni Wakur; Handry Rawung; Robert Molenaar; Daniel P. Ludong
COCOS Vol. 6 No. 13 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i13.8665

Abstract

ABSTRACT Penelitian ini bertujuan untuk merancang dan membuat kompor biomassa, serta mengkaji proses pembakaran dengan bahan bakar kayu (cengkeh) dan pindah panas pada kompor biomassa. Analisis dilakukan terhadap suhu nyala api, suhu dinding kompor,suhu dinding luar panci, suhu dinding dalam panci, suhu air dan lamanya pemasakan air. Perhitungan yang dilakukan meliputi energi panas yang terkandung dalam bahan bakar yang digunakan dan energi panas yang digunakan, serta efisiensi pemanasan air. Penelitian ini dilakukan awal bulan Juli sampai awal September 2014 di Bengkel Keteknikan Fakultas Pertanian Universitas Sam Ratulangi Manado. Kajian proses pembakaran ini menggunakan 3 perlakuan yang dianggap taraf yang diambil dari berat bahan bakar yang digunakan yaitu jumlah bahan bakar 500 g, 750 g,  dan 1000 g. Data hasil penelitian dicatat dan dihitung kemudian disusun dalam bentuk tabelaris lalu digambarkan dalam bentuk grafik.  Analisis yang digunakan dalam penelitian ini ialah deskriptif. Hasil penelitian ini menunjukkan bahwa kompor biomassa yang mengunakan bahan bakar kayu sebagai sumber energi dapat memenuhi kebutuhan kelangsungan hidup rumah tangga dalam masak-memasak.  Kata Kunci: Kompor biomassa, bahan bakar kayu cengkeh, efisiensi pemanasan air
Co-Authors A.A. Ketut Agung Cahyawan W Andreas R. Pinontoan Andreas R. Pinontoan, Andreas R. Benny . Christian M. Sumampouw Dahlan Daniel P. Ludong Daniel P. Ludong, Daniel P. Daniel P.M. Ludong David P. Rumambi David Rumambi Dedie Tooy Dr. Ir. Frans Wenur, MS Edi Suryanto Esry O. H. Laoh Frans Wenur Gabriela A. Assa Gerson Wohon Gregoria S. S. Djarkasi Handry Rawung Herry F. Pinatik Hildy Wullur Ireine A. Longdong Jhiro Christian Mailool Joel Irianto Arring Johsi R. Rawung Lady C Ch E Lengkey Lady C. Ch. E. Lengkey Lady Lengkey Lexi M. Pendong Lexi M. Pendong, Lexi M. Lucia Cecilia Mandey Manongko, Patricia Syaron Mikael, Florensi Wahyuni Momongan, Fransiska Oktavia Nikita V. Momongan Novan G. Sumampow Paembonan, Fijar Y. Putria G. Rompas Richard A.V. Koloay Rompas, Krisye Sharon Ronal Lumba Roni Wakur Roni Wakur, Roni Ruland A. Rantung Ruland Rantung Sandra E. Pakasi Stenli F. E. Pomantow Yulian Sagrim