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All Journal Jurnal Pendidikan (Teori dan Praktik) Jurnal Penelitian Pendidikan IPA (JPPIPA) Al-Kimia IJCER (International Journal of Chemistry Education Research) JURNAL EDUCATION AND DEVELOPMENT Social, Humanities, and Educational Studies (SHEs): Conference Series Journal of Educational Chemistry (JEC) JP (Jurnal Pendidikan) : Teori dan Praktik Arfak Chem: Chemistry Education Journal Science Education and Development Journal Archives Journal of The Indonesian Society of Integrated Chemistry
Nugroho, Deni Ebit
UIN Walisongo Semarang
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Neuroscience Physics Social Sciences Other

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Identifikasi miskonsepsi siswa menggunakan tes diagnostik five-tier pada materi larutan penyangga Ulfa Berlian Awwalin; Deni Ebit Nugroho
Science Education and Development Journal Archives Vol. 2 No. 1 (2024): Science Education and Development Journal Archives
Publisher : Yayasan Insan Mulia Bima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59923/sendja.v2i1.79

Abstract

Kimia merupakan ilmu yang bersifat abstrak dan cukup sulit bagi siswa untuk memahaminya mengingat adanya tiga representasi yang harus dikuasai. Kimia bersifat hirarki, artinya suatu konsep berkesinambungan dengan konsep lainnya. Larutan penyangga merupakan salah satu materi kimia yang sulit dipahami dan siswa sering mengalami miskonsepsi. Perlu ditinjau ulang untuk mengetahui seberapa besar kesalahpahaman siswa setelah proses pembelajaran dan setelah pembelajaran, sehingga dengan adanya penelitian mengidentifikasi mengenai miskonsepsi dapat mengukur sejauh mana tingkat miskonsepsi siswa dan dapat menjadi masukan bagi guru. Tujuan penelitian ini untuk memberikan informasi mengenai miskonsepsi dan penyebab terjadinya miskonsepsi pada materi larutan penyangga. Jenis penelitian ini menggunakan pendekatan kuantitatif deskriptif. Subjek pada penelitian ini sebanyak 69 siswa kelas XII SMA Negeri 11 Semarang. Instrumen yang digunakan berupa tes diagnostik five-tier. Tes dilakukan dengan menggunakan media Googleform. Berdasarkan hasil analisis diketahui bahwa persentase miskonsepsi siswa sebesar 41,06%, tidak paham konsep 33,58%, paham konsep 8,58% dan eror 16,79%. Penyebab miskonsepsi ada beberapa, diantaranya pemikiran pribadi 29,71%, guru 0,24%, buku 1,57%, teman 5,19%, dan internet 3,86%.
Efektivitas model PBL-GI dalam meningkatkan literasi sains pada materi kesetimbangan kimia di SMA Mutmainnah; Mardhiya, Julia; Nugroho, Deni Ebit
Arfak Chem: Chemistry Education Journal Vol. 8 No. 1 (2025): Arfak Chem
Publisher : Universitas Papua, Manokwari, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/accej.v8i1.837

Abstract

Ideally, students should have scientific literacy skills to understand and apply chemical concepts in real life. Students' scientific literacy is still low, especially in understanding abstract chemical equilibrium material. This study aims to analyze the effectiveness of the Problem-Based Learning-Group Investigation (PBL-GI) model in improving students' scientific literacy in chemical equilibrium material. This study used a quasi-experimental method with a nonequivalent control group design. The sample was selected using the cluster random sampling technique, and data were collected through test and non-test techniques. The results of the study showed that the PBL-GI model was effective in improving students' scientific literacy, as evidenced by the results of the hypothesis test (tcount = 4.824> ttable = 1.669), and the N-gain value of the experimental class (0.6487) was higher than that of the control class (0.5064). Thus, Ha is accepted, namely, the PBL-GI model effectively improves students' scientific literacy skills. The results of this study are expected to encourage teachers to design problem-based learning relevant to real life.
Profiling and characterizing of banana (Musa paradisiaca) flower bracts-based bioplastic with sorbitol as a plasticizer Ebit Nugroho, Deni; Tri Suryandari, Ervin; Hadi Kusuma, Hamdan; Mujiasih; Kustomo
Al-Kimia Vol 13 No 1 (2025): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Banana flower bracts (BFB) are a promising source of starch as a bioplastic material. However, starch-based bioplastics products are primarily stiff and rigid to shape. Polyvinyl alcohol (PVA) may improve the elasticity and increase force resistance of starch-based bioplastics. Therefore, this study aims to analyze the characteristics and determine the optimal combination of BFB starch and PVA concentration for bioplastic production. The BFB were chopped and boiled until soft, soaked in sodium bisulfite solution for 30 minutes, and dried to produce fine powder. The powder was macerated in clean water for two days to produce starch, which was then combined with 0.5 chitosan and various concentrations of PVA. Physical characteristic tests, including Force, tensile strength, elongation, and biodegradation, were measured to determine the best composition. This study found the combination of 0.5 gr of BFB starch, 0.5 gr of chitosan, and 10 ml of PVA improved the capability of bioplastic to hold more than 13 N and tensile strengths up to 25 MPa. Furthermore, increasing BFB concentration is in line with enhanced durability; however, it reduces flexibility. Conversely, PVA significantly increased plasticity and elasticity while maintaining high biodegradability (61.2% per day).
Co-Authors Ani Rusilowati Fachry Abda El Rahman Hadi Kusuma, Hamdan Harahap, Lenni Khotimah Julia Mardhiyah Kustomo Miftahun Nafiul Ummah Mujiasih Mujiasih Prayitno, Mohammad Agus Putut Marwoto Rania Nurul Khasanah Sigit Priyatmoko Sri Mulyanti Tri Suryandari, Ervin Ulfa Berlian Awwalin Ulfa Lutfianasari Wiwi Isnaeni