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All Journal Pasundan Food Technology Journal (PFTJ) Unnes Science Education Journal
Nur Rohmah Tria Romadhoni
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Industrial & Manufacturing Engineering

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PENGARUH PERBEDAAN KONSENTRASI Acetobacter xylinum TERHADAP KUALITAS NATA DE BANANA SKIN Nur Rohmah Tria Romadhoni; Puspita Diana Arumawati; Fadhiatul Mufrihah; Pramesti Dewi; Dewi Mustikanintyas
Pasundan Food Technology Journal (PFTJ) Vol 10 No 1 (2023): PASUNDAN FOOD TECHNOLOGY JOURNAL
Publisher : Department of Food Technology, Universitas Pasundan, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/pftj.v10i1.6782

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh perbedaan konsentrasi Acetobacter Xylinum terhadap kualitas Nata de Banana dari limbah kulit buah pisang raja. Peneliti menggunakan kulit pisang sebagai objek penelitian karena terdapat senyawa pendukung pertumbuhan (growth promoting factor) dan adanya kandungan karbohidrat yang akan meningkatkan pertumbuhan mikroba. Jenis penelitian yang digunakan yaitu penelitian Eksperimen dengan pendekatan Kualitatif. Variabel dalam penelitian ini meliputi variabel bebas dengan konsentrasi mikroba Acetobacter xylinumvariasi 10%, 20%, dan 30%. Variabel terikat pada penelitian ini meliputi berat, ketebalan, dan warna pada produk Nata de Banana Skin. Variabel terkendali pada penelitian adalah variabel yang diperlakukan dalam keadaan yang sama yaitu meliputi media ekstrak kulit pisang dan lama fermentasiselama 10 hari. Hasil analisis pada masing-masing parameter dengan dua kali ulangan: Nata yang memiliki berat paling tinggi pada konsentrasi Acetobacter xylinum 20% yaitu (5g; 6g) dan 30% (8g; 7g). Ketebalan paling tinggi pada konsentrasi Acetobacter xylinum sebanyak 30% yaitu 5 mm & 4 mm. Konsentrasi Acetobacter xylinum yang digunakan tidak berpengaruh terhadap perbedaan warna nata yang dihasilkan karena memiliki warna yang sama, yaitu cream. Tetapi terdapat perbedaan kecerahan pada masing-masing konsentrasi. semakin tinggi konsentrasi Acetobacter xylinum yang ditambahkan menghasilkan warna yang lebih menguning. Pada penelitian ini memberikan hasil terbaik pada konsentrasi 30%
Analysis Validity, Readability, and Practicality of the Ecosystem E-Booklet Based on the Local Potential of Grogolan Spring to Improve Students’ Critical Thinking Ability Nur Rohmah Tria Romadhoni; Alimah, Siti; Ellianawati, Ellianawati
Unnes Science Education Journal Vol. 13 No. 2 (2024): August 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/usej.v13i2.9856

Abstract

This study aims to analyze the validity, readability, and practicallity of e-booklet on ecosystem material based on the local potential of the Grogolan spring in Bojonegoro which can improve students’ critical thinking skills through contextual learning. Contextual learning is considered important as it allows students to learn in a real-world context and experience firsthand what they are learning, rather than just reading and memorizing material. The local potential-based e-booklet is expected to make the material more meaningful and relevant to students, thereby improving their critical thinking skills. The subject of the study was a grade X student at Tambakrejo High School. Data analysis included the validity, readability, and practicality of the e-booklet. The research results showed that (1) The e-booklet contain specific information about ecosystem materials that utilize the local potential of Grogolan Spring in Bojonegoro, which is used as a learning resource. (2) The validity of the e-booklet, based on expert assessments, obtained an average score of 95.4% for material assessment and 93% for media assessment, both categorized as very valid, the small-scale readability test by teachers obtained an average score of 94.5% and by students an average score of 88.3%, both in the very good category. (3) The practicality assessment of using the local potential-based e-booklet obtained a score of 95.5% by teachers and 84.3% by students, both showing very practical categories. Based on the researach, it can be concluded that the local potential-based e-booklet is declared feasible, potentially to improve the critical thinking skills of high school learners.
Co-Authors Dewi Mustikanintyas Ellianawati, Ellianawati Fadhiatul Mufrihah Pramesti Dewi Puspita Diana Arumawati Siti Alimah