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All Journal Jurnal MIPA JURNAL ADMINISTRASI PUBLIK Jurnal Bios Logos JURNAL BIOMEDIK JURNAL ILMIAH SOCIETY Jurnal Ilmu dan Teknologi Pangan Jurnal FishtecH Pro Food International Journal of Artificial Intelligence Research Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Teknologi Pertanian (Agricultural Technology Journal) Community Development Journal: Jurnal Pengabdian Masyarakat SINTA Journal (Science, Technology, and Agricultural) Jurnal Agroekoteknologi Terapan Jurnal Ilmiah Sains IICSDGs AGRI-SOSIOEKONOMI COCOS Journal of Agribusiness and Rural Development (Jurnal Agribisnis dan Pengembangan Pedesaan)
Lucia Cecilia Mandey
Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Health Professions Immunology & microbiology Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Veterinary Other

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Desain dan Evaluasi Teknis Mesin Pengupas Kulit Kacang Macadamia (Macadamia integrifolia) PTR-TETA20 Ruland Rantung; Dedie Tooy; Putri Amelia; Lucia Cecilia Mandey
Jurnal Penelitian Pendidikan IPA Vol 11 No 6 (2025): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i6.10969

Abstract

Macadamia (Macadamia integrifolia) is a high-value crop not widely known in Indonesia and still processed using conventional shelling methods that are time-consuming and inefficient. This study aimed to design and evaluate the PTR-TETA20 macadamia nut sheller to improve post-harvest efficiency. The research was conducted from May to July 2024 at the Faculty of Agriculture, Sam Ratulangi University. The methodology involved the design, construction, and performance testing of the machine using experimental methods and descriptive data analysis. The PTR-TETA20, measuring 30 × 23 × 113 cm and powered by a 1/4 HP motor with a pulley and V-belt system at 1467 RPM, was tested using 1 kg of macadamia nuts in three repetitions. The average working capacity reached 38.43 kg/hour, with a yield of 92.52%. Nut integrity was recorded as 40.22% whole, 36.10% halved, and 23.66% broken. Moisture content was 2.6% (whole), 2.56% (halved), 2.83% (broken), and 9.52% (shells). The results indicate that PTR-TETA20 offers a practical shelling solution for small-scale producers. However, machine performance can be improved by optimizing roller spacing and ensuring uniform nut drying.
Chemical Composition and Sensory Characteristics of Skimmed Milk Kefir Sensory on Variation of Concentration of Light Coconut Extract (Cocos Nucifera L.) Yoakhim Yafet Engelhard Oessoe; Lucia Cecilia Mandey; Cecillia Angela Fernandez
Jurnal Penelitian Pendidikan IPA Vol 10 No 9 (2024): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i9.9175

Abstract

Kefir is a fermented milk product that is processed through fermentation of kefir granules. The objectives of this study are: 1. To analyse the effect of young coconut extract concentration on total microbes, ethanol and pH value of skimmed milk kefir. 2. To analyse the sensory test results of skimmed milk kefir with young coconut extract concentration. The method used in this research is Completely Randomised Design (CRD) with the treatment of variations in the percentage of skimmed milk and young coconut extract, namely: 100% skimmed milk: 0% young coconut extract; 95% skimmed milk: 5% young coconut extract; 90% skimmed milk: 10% young coconut extract; 85% skimmed milk: 15% young coconut extract; 80% skimmed milk: 20% young coconut extract with 3 repetitions and obtained 15 experimental units. The data obtained were analysed by ANOVA (Analysis of Variant). The results showed that increasing the concentration of young coconut extract increased the total number of microbes. Total microbes ranged from 1.48 x 10⁸ to 2.17 x 10¹⁰. Increasing the extract concentration from 15% to 20% increased the alcohol content from 0.07% to 0.20. Increasing the concentration of young coconut extract also significantly decreased the pH value of kefir after fermentation, with the lowest pH value (3.18) at 20% concentration. The concentration of young coconut extract in skimmed milk kefir significantly affected colour, texture and taste.
Co-Authors ., Mety Ali , Almer Hassan Almer Hassan Ali Arman Arman Arman Bagus Iryanto Bobby Polii Caroline B.D. Pakasi Cecillia Angela Fernandez Cenny Sulastri Br Pandiangan Charles Ngangi Charles R. Ngangi Chi Chi Nur Anisa Basiru Christine F. Mamuaja Christine Makagansa, Christine Christine Mamuaja Christy Sakendatu Christy Sakendatu, Christy Dantje Tarore Dedie Tooy Dekie Rawung Edi Suryanto Elias Saroa, Elias Erny Nurali Frans Lumoindong, Frans Frisly Sayangbati G.S.S. Djarkasi Gabriela Sampelani Joseph Gregoria S. S. Djarkasi Gregoria S.S. Djarkasi Herson, Nur Afiah Herwwin V. Manurung Hindom, Penina P. I Ketut Suwetja Inneke F. M Rumengan Jaka F.P. Palawe, Jaka F.P. Jaka Frianto Putra Palawe Jantje Pongoh Jenny E A Kandou Jenny E.A. Kandou Jenny E.A. Kandou Joppi ., Lengkong Joy Elly Tulung Kalawat Lengkongb, Victor Paska Kalawat Kandou, Jenny E. A. Kandou, Jenny E. A. Ketut Suwetja Koleangan, Amanda Archangela Korompis, Olga S. Lana E. Lalujan Lefina, Silvya Lempoy, Wulan Kristie Lengkong, Joppi ., Lexie P. Mamahit Lexie P. Mamahit Luntungan, Aldian H. Magrietje B. Lelengboto Makinggung, Putri Natacia Mandey, Silvya Lefina Manongko, Patricia Syaron Martha R.R. Rumaratu Masinambow, Vecky A.J. Max Tulung Maya M. Ludong Mercy Taroreh Moh. Irwanto Ahmd MOTULO, BRENDA Mukhlis Muson B. Hermanus, Muson B. Natasia M. Dumais Nelly Mayulu Novia M.T. Dera Novke J. Pongajow, Novke J. Oessoe, Yoakhim Y. E. Olivia Nelwan Olivia P.M. Purukan Palandeng, Feriana C. Pandiangan, Cenny Sulastri Br. Penina P. Hindom Pipih Suptijah Porotu’o, John P. Porotu’o, Lely I. Putri Amelia Ribka Mandagi Rini Pakaya, Rini Rita R. Tangdiongga, Rita R. Rivo M. Saroinsong Rivo M. Saroinsong, Rivo M. Robert Molenaar Rogi, Joshua T. A. Ruland Rantung Sabrina Berta Sachlan, Putri A. A. U. Sangkilen, Lisa Shirley E. S. Kawengian Sidun, Monica Silvia Mandey, Silvia Silvya L Mandey, Silvya L Sumual, Maria Fransisca Teltje Koapaha Thelma D. J. Tuju, Thelma D. J. Thelma D.J. Tuju Tineke Langi Tineke M. Langi Tumbol, Michael Veron Orlando Tamauka Wahyuny Langelo Wokas, Chichilia Yoakhim Oessoe Yoakhim Yafet Engelhard Oessoe Yoan Y. Bolung Yunus, Yudin