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All Journal Jurnal Teknik Kimia USU Jambura Journal of Chemistry Jurnal Sains Boga Jurnal Teknik Kimia USU
Lestari, Ayu Wiji
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Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Public Health Social Sciences Other

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Perbandingan Daya Simpan dan Penilaian Sensoris Mi Basah dengan Penambahan Ekstrak Daun Melinjo (Gnetum gnemon L) Sebagai Pengawet Alami Lestari, Ayu Wiji; Akhmad Mutohhar; Akhmad Faried Yusuf; Iffah Muflihati; Sari Suhendriani
Jurnal Sains Boga Vol 7 No 1 (2024): Jurnal Sains Boga Volume 7 Nomor 1, Mei 2024
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JSB.007.1.02

Abstract

Wet noodles are raw noodles that require cooking by boiling in boiling water before consumption. The water content in wet noodles ranges from 52-60%. High water content causes wet noodles cannot be stored for a long time. One of the natural ingredients that can be used as a preservative is melinjo leaves. The purpose of this study was to determine the effect of natural preservatives from melinjo leaf extract on the shelf life of wet noodles. Using a one-factor completely randomized design (CRD) with different ages of melinjo leaves, namely young leaves, old leaves, dry leaves, and also a mixture of the three. The extraction process is carried out through the maceration method. The solvent used in this extraction is distilled water. From the results of the research on the shelf life of wet noodles, the best shelf life analysis was found in the treatment of young leaves, namely 24 hours, testing the water content with the results for each treatment of young leaves 54.7%, old leaves 49.07%, dry leaves 48, 8% , mix 53.8%. The color test on the brightness parameter (L) was the highest on old leaves 69.42, the redness level parameter (a) was the highest on the control 4.17 , the redness level parameter (b) was the highest on the mixture 17.28. The organoleptic test showed that the wet noodles with each treatment with the addition of melinjo leaf extract were not significantly different. The hedonic test of wet noodles was acceptable to the panelists with an average value of color 4.00, aroma 3.50, taste 3.84, texture 4.00, appearance 3.98.
Perbedaan Lama Sakarifikasi dan Konsentrasi Substrat Pada Pembuatan Gula Cair Dari Pisang Tanduk Lestari, Ayu Wiji; Muflihati, Iffah; Mariska, Nurul Putri; Anggraeni, Cerly Nurlita; Affandi, Arief Rakhman; Fitriyana, Vicha; Nurdyansyah, Fafa
Jambura Journal of Chemistry Vol 7, No 2 (2025): August
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jambchem.v7i2.27600

Abstract

Gula cair banyak dipilih oleh industri makanan dan minuman karena kelebihannya yang tidak mudah mengkristal, lebih praktis, dan mudah dilarutkan, serta dapat mempercantik tampilan produk seperti pada industri roti. Pisang, khususnya pisang tanduk, dengan kandungan karbohidrat dan pati yang tinggi memiliki potensi yang besar untuk dikembangkan menjadi gula cair melalui proses hidrolisis enzimatik dengan menggunakan enzim α-amilase dan glukoamilase. Tujuan penelitian ini yaitu untuk mengkaji pengaruh kondisi proses konsentrasi substrat dan lama proses sakarifikasi terhadap pembuatan gula cair dari pisang tanduk dengan menggunakan metode enzimatis dengan penambahan enzim glukoamilase pada proses sakarifikasi. Penelitian ini dilakukan dengan metode Rancangan Acak Lengkap (RAL) model faktorial dengan 2 faktor. Faktor pertama adalah waktu sakarifikasi (6 jam dan 8 jam) dan faktor kedua adalah konsentrasi substrat (15%, 20% dan 25%). Penggunaan waktu sakarifikasi dan jumlah konsentrasi substrat berpengaruh secara signifikan terhadap viskositas, kadar abu, dan intensitas warna. Perlakuan terbaik adalah waktu sakarifikasi selama 8 jam dan konsentrasi substrat pati 25% (b/v) yang menghasilkan nilai viskositas sebesar 41,50 mPa.s, nilai kadar abu 0,35%, dan nilai L*, a*, dan b* berturut-turut sebesar 47,27±0,12cd, 0,30±0,03a, dan 2,25±0,03b.
Penerapan Metode Enzimatis pada Pembuatan Gula Cair dengan Lama Sakarifikasi dan Konsentrasi Substrat yang Berbeda Lestari, Ayu Wiji; Muflihati, Iffah
Jurnal Teknik Kimia USU Vol. 15 No. 1 (2026): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v15i1.18141

Abstract

Liquid sugar is utilized in the food and beverage industry due to its advantages of being non-crystallizing, practicable, soluble, and visually improved appearance. The horned banana, in particular, contain high levels of carbohydrates and starch, having the potential development into liquid sugar through enzymatic hydrolysis using α-amylase and glucoamylase enzymes. The aim of this study to determine the treatment resulting in the highest yield of reducing sugars and review the effect of long saccharification and substrate concentration of horned banana starch, on the physicochemical of liquid sugar. The horned bananas was gelatinized a temperature of 75°C using starch concentrates of 15%, 20%, and 25%, liquefied for 6 and 8 hours, and vaporized for 24 hours at 60°C. These results prove that the longer the duration of saccharification and the higher the starch substrate concentrate, the high yield, reducing sugar content, dextrose equivalent, and °Brix value. The optimal treatment was 8 hours of saccharification and a 25% starch substrate. This produced a yield of 59.89%, a reducing sugar content of 25.64%, a DE (dextrose equivalent) of 16.77%, and a TPT (°Brix) of 29.87%.
Penerapan Metode Enzimatis pada Pembuatan Gula Cair dengan Lama Sakarifikasi dan Konsentrasi Substrat yang Berbeda Lestari, Ayu Wiji; Muflihati, Iffah
Jurnal Teknik Kimia USU Vol. 15 No. 1 (2026): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v15i1.18141

Abstract

Liquid sugar is utilized in the food and beverage industry due to its advantages of being non-crystallizing, practicable, soluble, and visually improved appearance. The horned banana, in particular, contain high levels of carbohydrates and starch, having the potential development into liquid sugar through enzymatic hydrolysis using α-amylase and glucoamylase enzymes. The aim of this study to determine the treatment resulting in the highest yield of reducing sugars and review the effect of long saccharification and substrate concentration of horned banana starch, on the physicochemical of liquid sugar. The horned bananas was gelatinized a temperature of 75°C using starch concentrates of 15%, 20%, and 25%, liquefied for 6 and 8 hours, and vaporized for 24 hours at 60°C. These results prove that the longer the duration of saccharification and the higher the starch substrate concentrate, the high yield, reducing sugar content, dextrose equivalent, and °Brix value. The optimal treatment was 8 hours of saccharification and a 25% starch substrate. This produced a yield of 59.89%, a reducing sugar content of 25.64%, a DE (dextrose equivalent) of 16.77%, and a TPT (°Brix) of 29.87%.
Co-Authors Akhmad Faried Yusuf Akhmad Mutohhar Anggraeni, Cerly Nurlita Arief Rakhman Affandi fafa nurdyansyah, fafa Fitriyana, Vicha Iffah Muflihati, Iffah Mariska, Nurul Putri Sari Suhendriani