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All Journal Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan JELLT (Journal of English Language and Language Teaching)
Amanda, Nabila Ayu
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Chemical Engineering, Chemistry & Bioengineering Education Energy Environmental Science Languange, Linguistic, Communication & Media

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Kajian Ekstraksi Lada Hitam (Piper nigrum l.) Menggunakan Metode Ultrasound-Assisted Extraction : Extraction Study of Black Pepper (Piper nigrum l.) Using Ultrasound-Assisted Extraction Method Amanda, Nabila Ayu; Syahrani, Alza Nadilla; Erliyanti, Nove; Panjaitan, Renova; Pujiastuti, Caecilia; Soemargono, Soemargono
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 7 No. 2 (2023)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2023.007.02.02

Abstract

Piper nigrum l. atau lada hitam, merupakan tanaman asli Indonesia yang juga tumbuh di Malaysia, Sri Lanka, Vietnam dan negara Asia Tenggara lainnya. Lada hitam dapat diolah sebagai oleoresin dengan melakukan ekstraksi. Ultrasound-Assisted Extraction adalah metode untuk meningkatkan hasil dan efisiensi ekstraksi oleoresin. Tujuan dari penelitian ini yaitu untuk mengkaji pengaruh waktu dan suhu ekstraksi terhadap rendemen, densitas, dan indeks bias, mengkaji komponen kimia oleoresin lada hitam serta mengkaji hasil relatif terbaik sesuai SNI 01-0025-1987-B. Bubuk lada hitam diekstraksi dengan ultrasound menggunakan pelarut etanol Rasio bahan dan pelarut yang digunakan adalah 0,37 b/v. Kondisi operasi dilakukan pada waktu ekstraksi 20, 35, 50, 65, dan 80 menit serta suhu ekstraksi 30, 40, 50, 60, dan 70 ˚C dan frekuensi 40 kHz. Hasil dari penelitian menunjukkan pengaruh waktu ekstraksi yang semakin lama dan suhu ekstraksi yang semakin tinggi maka rendemen, densitas, dan indeks bias yang dihasilkan akan semakin besar. Hasil relatif terbaik diperoleh pada waktu ekstraski 80 menit  dan suhu 70˚C dengan warna coklat pekat, berbentuk pasta cair, beraroma khas lada, rendemen sebesar 22,57%, densitas sebesar 0,8350 gram/ml, kadar piperin sebesar 74,78%, kadar minyak atsiri sebesar 25,22%, dan indeks bias sebesar 1,4900.
Investigating Students’ Motivation through Game-Based Learning in Listening Classroom Amanda, Nabila Ayu; Hadi, Meilda Mustafidah; Aulia, Nurhalisa Afti; Putri Hidayat, Regina; Hidayat , Didin Nuruddin; Mulyati, Yatni Fatwa
JELLT (Journal of English Language and Language Teaching) Vol 8 No 1 (2024)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36597/jellt.v8i1.16597

Abstract

Most students feel that listening is a difficult English skill because the strategies that the teachers use in listening classes are too monotonous, so students feel unmotivated in the learning process. However, there is a lack of researchers who have studied the implementation of running dictation games to increase students' motivation. This research aims to examine the use of games, especially running dictation games, in increasing student motivation in listening classes. This research was conducted at Mts. Darunnaim YAPIA, involving 23 students from 7th grade. The researcher used a qualitative approach to compile this research. The data was collected through the questionnaire for all of the 7th-grade students, and the Interviews with several students after the game was implemented. This study also analyzed the data with descriptive analysis and thematic analysis. The results of this research show that the motivation of Grade 7 YAPIA students still needs to improve due to external factors such as the strategies used, and media that does not support learning. In addition, the use of running dictation games in the learning process can boost students motivation and enhance their participation in the listening classroom
Co-Authors Aulia, Nurhalisa Afti Erliyanti, Nove Hadi, Meilda Mustafidah Hidayat , Didin Nuruddin Mulyati, Yatni Fatwa Pujiastuti, Caecilia Putri Hidayat, Regina Renova Panjaitan Soemargono Soemargono Syahrani, Alza Nadilla