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AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN
Published by Universitas Widya Mataram
ISSN : 25483757     EISSN : 26207508     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Agrotech Journal with registered number ISSN 2548-3757 (print) and ISSN 2620-7508 (online) is a scientific journal that publishes the results of research in the field of food and agricultural product technology. This journal is published by Faculty of Food Technology, Universitas Widya Mataram, Yogyakarta.
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Articles 77 Documents
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PENGARUH SUHU DAN LAMA PENYANGRAIAN TERHADAPKERAKTERISTIK SIFAT FISIK, KIMIA DAN ORGANOLEPTIKPADA SEDUHAN BIJI KOPI ROBUSTA, TEMPUR, JEPARA, JAWA TENGAH Halim, Mansyur Ali; Masrukan, Masrukan; Darmawan, Eman
AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Vol 3, No 2 (2021): Agrotech Volume 3, No 2
Publisher : Universitas Widya Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37631/agrotech.v3i2.283

Abstract

Penyangraian adalah proses pembentukan aroma dan citarasa pada biji kopi yang dilakukan dengan menggunakan suhu yang tinggi. Saat ini masih sedikit data tentang bagaimana proses penyangraian yang tepat untuk menghasilkan produk kopi yang berkualitas. Sehingga terdapat beberapa kasus kurangnya penyesuaian suhu dan lamanya proses penyangraian yang dapat menyebabkan penurunan mutu akibat over roast. Penelitian ini dilakukan untuk mengetahui pengaruh suhu dan lama penyangraian terhadap perubahan sifat fisik, kimia dan organoleptik kopi Robusta Tempur. Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) Faktorial dengan perlakuan variasi suhu dan lama penyangraian yang terdiri dari tiga taraf, yaitu suhu penyangraian terdiri dari tiga taraf, yaitu suhu 190°C, 200°C, dan 210°C sedangkan lama penyangraian terdiri dari tiga taraf, yaitu 5 menit, 10 menit, dan 15 menit. Setiap perlakuan dilakukan tiga kali ulangan sehingga diperoleh 27 (dua puluh tujuh) satuan percobaan. Hasil analisis sidik ragam (ANOVA) menunjukkan bahwa variasi suhu dan lama penyangraian berpengaruh nyata terhadap rendemen, kadar air, kadar abu, kadar lemak dan kadar kafein kopi Robusta Tempur, tetapi tidak pada kadar asam total, protein dan karbohidrat. Perlakuan penyangraian biji kopi pada suhu 190°C dan lama penyangraian 5 menit menghasilkan kadar air akhir kopi robusta sebesar 2,01%. Perlakuan penyangraian biji kopi pada suhu 200°C dan lama penyangraian 15 menit menghasilkan kadar kafein akhir kopi Robusta, Tempur sebesar 1,67%. Berdasarkan uji organoleptik, kopi Robusta Tempur yang paling disukai panelis adalah kopi yang disangrai pada suhu 190˚C dengan lama penyangraian 10 menit. Sifat fisik dan kimia kopi robusta tempur adalah kadar air 2.01%, kadar abu 8,76%, kadar asam total 0,68%, kadar protein 13,77%, karbohidrat 68,77%, kadar lemak 13,25% dan kafein 1,67%.
Nugget Antistunting dengan Memanfaatkan Hidrolisat Protein dari Ikan Lele Dumbo (Clarias gariepinus) Darmawan, Eman
AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Vol. 4 No. 1 (2022): Agrotech: Jurnal Ilmiah Teknologi Pertanian
Publisher : Universitas Widya Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37631/agrotech.v4i1.581

Abstract

Nugget Antistunting  dengan Memanfaatkan  Hidrolisat Protein Dari Ikan Lele Dumbo (Clarias gariepinus) bertujuan untuk mengetahui sifat  kimia dan penerimaan konsumen terhadap penambahan hidrolisat protein lele dumbo pada nugget yang dihasilkan. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan faktor tunggal yaitu pengaruh konsentrasi penambahan hidrolisat protein lele dumbo yang terdiri dari  5 perlakuan. Tiap perlakuan dilakukan pengulangan sebanyak tiga (3) kali. Data yang diperoleh dilakukan Analisis of Varians (ANOVA), apabila terdapat perbedaan antara perlakuan dilakukan uji lanjutan dengan Metode Duncan’s Multiple Ranges Test (DMRT) pada jenjang 5%. Penambahan hirolisat protein lele dumbo ke dalam nugget berpengaruh secara nyata terhadap nugget yang dihasilkan, dapat meningkatkan kadar air, protein, lemak dan abu, dapat menurunkan keempukan,  warna dan rasa tidak mengalami perubahan. Nugget yang disukai adalah penambahan hidrolisat protein lele dumbo 5 g dengan kriteria kadar air 58,72%, kadar protein 22,09 %db, kadar lemak 13,24 %db, kadar abu 5,42%db,  warna coklat keemasan (3,95), rasa enak (4,02) dan tekstur empuk (4,05) 
Substitusi Kecambah Jagung pada Pembuatan Silken Tofu terhadap Sifat Fisiknya Rukmi, Kuntjahjawati Susilo Adi
AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Vol. 4 No. 1 (2022): Agrotech: Jurnal Ilmiah Teknologi Pertanian
Publisher : Universitas Widya Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37631/agrotech.v4i1.584

Abstract

Produk  olahan kedelai yang telah lama dikenal diantaranya adalah tahu,  kembang tahu (Yuba), kecambah kedelai (soybeans sprout), susu kedelai (soybeans milk), bubuk kedelai dan kedelai rebus (edamame). Tahu juga mempunyai berbagai jenis yaitu tahu lunak, medium, keras. Tahu lunak dan medium mempunyai kelemahan karena mudahnya mengeluarkan air (sineresis) pada saat disimpan. Kelemahan ini dapat ditangani dengan penambahan bahan lain yang mampu meningkatkan kemampuan menahan air dalam tahu yaitu berasal dari “protein base” (GDL, gelatin) dan “karbohidrat base” (karagenan, agar, pektin). Pada penelitian dengan topik:  Substitusi Kecambah Jagung pada Pembuatan Silken Tofu terhadap Sifat Fisiknya ini akan dikaji potensi perbaikan kecambah jagung untuk memperbaiki sifat dan karakter silken tofu.Penelitian dilakukan dengan 3 tahap yaitu tahap 1 pembuatan kecambah jagung dan tahap ke 2 pembuatan silken tofu serta tahap ke 3 merupakan penelitian utama pembuatan silken tofu dengan substitusi kecambah jagung. Adapun perbandingan antara berat kedelai dan kecambah jagung adalah 9:1; 8:2; 7:3; 6:4; 5:5. Perhitungan berat berdasarkan berat kering kedelai dan jagung. Selanjutnya silken tofu dianalisa fisik meliputi rendemen, tekstur, warna, rasa, aroma. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap yang dilanjutkan dengan Analisa korelasi menggunakan ANAVA pada rentang 5%. Bila dari ANAVA diperoleh informasi ada korelasi maka dilanjutkan dengan uji beda menggunakan metode Duncan Multiple Range Tests.Semakin banyak jumlah kecambah jagung yang ditambahkan maka rendemen semakin sedikit tetapi keluarnya air selama 7 hari penyimpanan semakin sedikit. Penambahan kecambah jagung mulai dari perbandingan kedelai: kecambah jagung 70:30 memberikan pengaruh yang nyata terhadap sifat fisik: Tekstur semakin rapuh, Warna semakin kecoklatan, dan aroma kedelai tahu menjadi semakin berkurang. Semakin banyak penambahan kecambah jagung porositas tahu menjadi semakin porous.
Pengaruh Penambahan Ekstrak Jahe Merah (Zingiber officinale Var. Rubrum) Pada Pembuatan Gula Batu Laswati, Dyah Titin
AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Vol. 4 No. 1 (2022): Agrotech: Jurnal Ilmiah Teknologi Pertanian
Publisher : Universitas Widya Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37631/agrotech.v4i1.585

Abstract

Penelitian ini bertujuan  untuk mengetahui pengaruh penambahan ekstrak jahe merah pada pembuatan gula batu dengan variasi waktu pemasakan terhadap sifat kimia   (antioksidan), sifat fisik (rendemen  dan liquid), organoleptik (hedonic scale test). Rancangan yang digunakan pada penelitian ini adalah Rancangan Acak Kelompok (RAK) dengan 3 level perlakuan pemanasan 30 menit, 40 menit dan 50 menit baik tanpa jahe maupun dengan jahe sehingga diperoleh 6 satuan percobaan dan masing-masing percobaan dilakukan 3 kali ulangan. Data hasil pengamatan dianalisa  statistik dengan uji Anova dan dilanjutkan uji   Duncan’s New Multiple Range Test (DMRT) pada taraf signifikansi 5%.  Parameter yang diuji antara lain aktivitas antioksidan, rendemen dan berat liquid tersisa serta sifat organoleptik adalah kesukaan (Hedonic scale test). Panelis yang digunakan 30 panelis. Hasil rendemen tertinggi pada perlakuan gula batu tanpa jahe  waktu pemanasan/evaporai 50 menit yaitu 56,00% sedangkan berat liquid yang dihasilkan tertinggi pada perlakuan dengan ekstrak jahe waktu pemanasan/evaporasi 30 menit yaitu 267,33 g, kadar antioksidan paling tinggi yaitu 56,97% RSA yakni gula batu dengan ekstak jahe merah waktu pemanasan/evaporasi 50 menit. Nilai kesukaan tertinggi adalah gula batu dengan ekstrak jahe merah waktu pemasakan/evaporasi 30 menit. 
INHIBITORY EFFECT OF ASCORBIC ACID MICROEMULSION ON PHOTO-OXIDIZED VIRGIN COCONUT OIL Rukmini, Ambar
AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Vol. 1 No. 1 (2016): Agrotech: Jurnal Ilmiah Teknologi Pertanian
Publisher : Universitas Widya Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37631/agrotech.v1i1.2

Abstract

The effect of water-in-oil (w/o) microemulsion containing ascorbic acid on photo-oxidative stability of virgin coconut oil (VCO) was investigated. To optimize the formulation, w/o microemulsions were prepared using hydrophilic lipophilic balance (HLB) concept, consisted of ternary nonionic surfactants having low, medium, and high HLB values. From this optimum HLB number, the ratio of water, surfactant and oil was determined to obtain microemulsion areas. After optimization of the microemulsion system, the storage at room temperature, and the extreme condition were conducted for testing the microemulsion stability. Then, the stable formulas were used for delivering ascorbic acid. The solubility and photo-oxidative stability of ascorbic acid microemulsion were evaluated. The optimum formula of ascorbic acid microemulsion was applied into VCO at various concentrations (0, 1, 5, and 10% w/w). Samples were subjected to photo-oxidation under fluorescent light exposure of 4000 lux for up to 8 hours. Peroxide values (PVs) and p-anisidine values (p-AnVs) of the samples were measured at 1 hour interval. The results indicated that w/o microemulsion could be formed on the HLB number of 7. W/o microemulsion containing 75% oils need surfactant concentrations of ≥ 4.5 part of water, and if containing 77.78% oils, the surfactant concentration must ≥ 5.5 part of water. These microemulsions remained stable during storage at room temperature, even after centrifugation, but did not tolerate at high temperature. The maximum solubility of ascorbic acid in w/o microemulsion was 1%. Ascorbic acid microemulsion resistant to photo-oxidation and effective inhibits that reaction in VCO. This study confirmed that w/o microemulsion can act as ascorbic acid delivery system to disperse into VCO for inhibiting its’ quality deterioration due to photo-oxidation.
BIOSINTESA FOLAT OLEH BAKTERI ASAM LAKTAT Purwandhani, Siti Nur
AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Vol. 1 No. 1 (2016): Agrotech: Jurnal Ilmiah Teknologi Pertanian
Publisher : Universitas Widya Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37631/agrotech.v1i1.3

Abstract

Folate, an important B-group vitamin, participates in many metabolic pathways such as DNA and RNA biosynthesis and amino acid inter-conversions. Mammalian cells cannot synthesize folate; therefore, an exogenous supply of this vitamin is necessary to prevent nutritional deficiency. Folic acid is a composite molecule, being made up of three parts: a pteridine ring system (6-methylpterin), para-aminobenzoic acid , and glutamic acid . The folate biosynthesis pathway in micro-organisms can be divided in several parts. The pteridine proportion of folate is made from GTP, that is synthesized in the purine biosynthesis pathway. p-Aminobenzoic acid originates from chorismate and can be synthesized via the same biosynthesis pathways required for the aromatic amino acids, involving glycolysis, pentose phosphate pathway and shikimate pathway. The third component of a folate molecule is glutamate, that is normally taken up from the medium. This review will focus on biosynthesis and folate production by lactic acid bacteria and the folate level production in fermented product.
SIFAT PRO-OKSIDAN SARI JERUK NIPIS (Citrus aurentifolia) TERHADAP AKTIFITAS ANTIOKSIDAN TEH HIJAU (Camellia sinensis) sudjatini, Sudjatini
AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Vol. 1 No. 1 (2016): Agrotech: Jurnal Ilmiah Teknologi Pertanian
Publisher : Universitas Widya Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37631/agrotech.v1i1.4

Abstract

The research was designed to understand the effect of addition of extract citrus on the antioxidative activity of green tea and to determine the optimum temperature  at the process of green tea extraction to get the best antioxidative activity.Two treatment factors were arranged in completely randomized design with three replications. First treatment factor was the temperature extraction of green tea consisted of 30, 60 and 100 oC, whereas the second treatment factor was concentration of extract citrus consisted of 0.0, 0.2, 0.4, 0.6, 0.8 and 1 %. The contents of polyphenol, tannin, total  acids were chemically determined, whereas antioxidative activity was determined by radical scavenging affect (RSA). Data were analyzed using analysis of variance (ANOVA) and Duncan’s Multiple Range Test (DMRT) if there was a significant difference in treatment effects.The research’s results show that there was insignificant interaction between temperature extraction of green tea and concentration of added extract citrus. Eventhough concentration of extract citrus did not significantly affect the contents of polyphenol and tannin but it affected significantly the contents of total acids and antioxidative activity of extract tea. The antioxidative activity at the concentration of extract citrus of 0.2 % was significantly greater than without extract citrus (as check treatment). The following increase in concentration of extract citrus until 1 % did not significantly increase in antioxidative activity. The temperature of tea extraction affected significantly on the contents of  polyphenol, tannin, total acids, and antioxidative activity of extract green tea. The highest values were obtained  at 100 oC and the the lowest at 30 oC. Temperature extraction of green tea of 100 oC and the addition of 0.2 % extract citrus was the optimum condition. At this condition,  the extract green tea contained polyphenol, tannin, total acids, and antioxidative activity as high as  13.77, 12.77, 0.69 and 93.37 %, respectively.
PEMANFAATAN BIJI KETAPANG (Terminalia catappa) SEBAGAI SUMBER PROTEIN DAN SERAT PADA PRODUK MAKANAN STIK Darmawan, Eman
AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Vol. 1 No. 1 (2016): Agrotech: Jurnal Ilmiah Teknologi Pertanian
Publisher : Universitas Widya Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37631/agrotech.v1i1.5

Abstract

The purpose of this study was to determine the effect of substitution ketapan seed to chemical and organoleptic properties of  the resulted snack food, knowing the exact level of substitution, so obtain the snack food liked the panelists. The design used in this study was completely randomized design (CRD) with single factor that influences the concentration of seed flour substitution ketapan seed consisting of 5 treatments. Each treatment be repeated 3 times. The data obtained was analyzed by Analysis of Variance (ANOVA), if there was a difference between the treatment of advanced test conducted by Duncan`s Multiple Ranges Test Method (DMRT) at the level of 5%. Substitution of wheat flour with ketapan seed flour  affects the snack food produced, which can reduce the water content of the snack food and increase levels of protein and fiber snack food. Ketapan seed flour substitution preferred by the panelists was substitution ketapan seed flour up to 30% with a value of 3.52 and the criteria snack food produced had a water content of 3.67%, 15.10% db protein content, fiber content of 3.64 % db, brownish yellow color (2.95), a rather tasted wheat flour (3.35), and crispy (3.60).
PENGARUH KONSENTRASI ASAM KLORIDA DAN LAMA PERENDAMAN TERHADAP SIFAT FISIK DAN KIMIA GELATIN TULANG IKAN TUNA (Thunnus albacare) Masrukan, Masrukan; Santoso, Umar
AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Vol. 1 No. 1 (2016): Agrotech: Jurnal Ilmiah Teknologi Pertanian
Publisher : Universitas Widya Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37631/agrotech.v1i1.6

Abstract

Type A gelatin was extracted from partial hydrolysis of collagen from tuna fish bone. The experiment was conducted to determine the effect of hydrochloride acid solution and soaking time on physical and chemical properties of tuna fish  bone gelatin and to determine optimum conditions for extraction of tuna fish bone gelatin which is based on the highest yield and gel strength. The experiment used randomized complete block design (RCBD) with two factors. The first factor was concentration of hydrochloric acid consisting of 3 level (1, 3, and 5% v/v) and the second factor was soaking time (24, 48, and 72 hours). The results showed that concentration of hydrochloric acid and soaking time significantly affect at the physical and chemical properties of tuna fish bone gelatin. The optimum condition obtained the treatment of gelatin was concentration of  hydrochloric acid 3% and soaking time 72 hours. Physical and chemical properties of gelatin from tuna fish bone, which is 120.37 gram Bloom gel strength; viscosity 4.75 cP;  melting point 20.37 ° C; color was yellowish brown, moisture content 11.85%, protein content 80.90%.; fat content 2.73% and ash content 8.12%.      
OPTIMASI EKSTRAKSI DAN PENENTUAN KANDUNGAN KATEKIN DALAM TEH HIJAU (Camellia sinensis) MENGGUNAKAN METODA HPLC sudjatini, Sudjatini
AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Vol. 2 No. 1 (2017): Agrotech: Jurnal Ilmiah Teknologi Pertanian
Publisher : Universitas Widya Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37631/agrotech.v2i1.8

Abstract

 This research was designed to determine the optimum period extraction time for catechin green tea using boiling water and ethyl acetate as a solubilizing agent, whereas the composition and the content of catechin green tea were measured using High Performance Liquid Chromatography (HPLC). A single factor experiment design was used. The period extraction time of green tea using boiling water and ethyl acetate were 5, 20, 35 and 60 minutes. The proportion of green tea at the extraction process was 1:15 (weight/volume). The extraction process using boiling water was done twice to get the maximum extracted catechin yield. The extracted catechin of green tea were, therefore, compared with epi-catechin as standard solution. The research’s results show that the optimum period for extraction time of green tea using boiling water and ethyl acetate were 35 and 20 minutes, respectively. The extracted green tea using boiling water was 41.39 % of its dry weight, and those extracted green tea contained catechin as high as 60.62-61.78 %. Catechin compound in green tea residues extracted using ethyl acetate was 5.31 % from 58.35 % the total green tea residues. The composition of catechin in the first boiling water extraction, the second boiling water extraction and pressure extraction consisted of epigallocatechin (EGC), epigallocatechin-gallat (EGCG), epicatechin (EC) and epicatechin-gallat (ECG). ECG was only found in green tea residue extracted using ethyl acetate. The total catechin compound in green tea extracted using boiling water and ethyl acetate was 27.73 % of dry weight, consisted of EGC, EGCG, EC and ECG were 14.74, 1.73, 8,35 and 2.91 % of green tea dry weight, respectively

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