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All Journal Chimica et Natura Acta Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education)
Sailendra, Pingkan Ramadhan
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science Materials Science & Nanotechnology

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Interactive Video-Based Learning with Edpuzzle: A Tool for Understanding Intermolecular Forces Sailendra, Pingkan Ramadhan; Erlina*, Erlina; Ulfah, Maria; Enawaty, Eny; Nizam, Dinna Nina Mohd
Jurnal Pendidikan Sains Indonesia Vol 13, No 1 (2025): JANUARY 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jpsi.v13i1.41443

Abstract

Students often encounter difficulties in understanding abstract chemistry concepts, particularly in the topic of intermolecular forces. These challenges can lead to misconceptions and hinder their understanding of subsequent material. The difficulty in visualizing submicroscopic and symbolic aspects, along with the lack of effective learning media, contributes to these issues. This study aims to assess the validity and responses of students and lecturers towards the interactive animated video on intermolecular forces (VIMFs) assisted by edpuzzle to enhance conceptual understanding. The method used in this is research and development with the ADDIE model. Data collection was conducted through literature review, observation, interviews, and tests (validity instruments and response questionnaires). The developed video was validated by experts in terms of media, content, and language aspects. Response testing was carried out with three lecturers and 9 students in a one-to-one trial, and 21 students in a small group trial. The validity test results showed that the developed instructional video's validity percentage in terms of content and language was 94.9, and 95.2% for media, with an average percentage of 95.05. The average percentage of lecturer responses to the developed video was 93.9, categorized as excellent, while the student responses in the one-to-one trial were 95.9, and 93.4% in the small group trial, both also categorized as excellent. Thus, the interactive animated VIMFs assisted by edpuzzle received excellent responses from both lecturers and students
Chemical Fingerprint Berbasis Spektroskopi Inframerah (ATR-FTIR) Dipadukan dengan Kemometrik Untuk Kontrol Kualitas Daun Kratom (Mitragyna Speciosa Korth.) Ragil, Ragil; Aninda, Dea; Pitri, Rosiana; Sailendra, Pingkan Ramadhan; Masriani, Masriani; Heryanto, Rudi
Chimica et Natura Acta Vol 12, No 1 (2024)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v12.n1.51276

Abstract

Kratom dijuluki sebagai daun narkotika dari Kalimantan yang memiliki berbagai efek biologi seperti antiinflamasi dan antinoseptif. Secara tradisional daun kratom digunakan untuk menambah stamina, mengobati diare, sakit perut, susah tidur, kolesterol, asam urat, dan diabetes. Permintaan daun kratom di pasaran begitu tinggi sehingga memunculkan masalah berupa pemalsuan daun tersebut dari tanaman yang memiliki kemiripan morfologi.Penelitian ini bertujuan mengembangkan metode  analisis  untuk mengidentifikasi dan mengautentikasi  daun kratom  dari daun jambu biji. Data hasil analisis ATR-FTIR dikombinasikan dengan analisis kemometrika untuk mengklasifikasikan serta mengelompokan data tersebut, sehingga dapat membedakan daun kratom dan daun jambu biji. Metode analisis ATR-FTIR yang dipadukan dengan analisis kemometrik melalui pemodelan PCA (Principal Component Analysis) dan PLS-DA (Partial Least SquaresDiscriminant Analysis) mampu membedakan daun kratom dan daun jambu biji. PCA dengan nilai PC 90% mampu mengelompokkan sampel daun kratom dan daun jambu biji. Model PLSDA berhasil memprediksi keaslian sampel uji daun kratom yang telah dicampur dengan daun jambu biji. Pembuatan model prediksi daun kratom dengan PLS menghasilkan R2 kalibrasi, R2 prediksi, RMSEC, dan RMSEV masing-masing sebesar 0,9068; 0,8641; 0,1366 dan 0,1666.  Hasil penelitian ini menunjukkan bahwa spektra ATR-FTIR dan kemometrik dapat digunakan untuk membedakan daun kratom dengan daun jambu biji serta mampu memprediksi keaslian daun kratom yang dipalsukan. 
Co-Authors Aninda, Dea Eny Enawaty Erlina*, Erlina Maria Ulfah Masriani . Nizam, Dinna Nina Mohd Pitri, Rosiana Ragil, Ragil Rudi Heryanto