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Christianto, Heru
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Mathematics Physics Other

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Efektivitas Pembelajaran Kimia Melalui Pemanfaatan Teknologi Daring Selama Pandemi Covid-19¬ di Program Studi Pendidikan Kimia Universitas Nusa Cendana Christianto, Heru; Lawa, Yosep; Parera, Lolita A. M.; Lestarani, Dewi; Lalang, Arvinda C.; Lalus, Fridom N.; Sunarko, Gilbertus F. M.; Liu, Melani M.W.
Jurnal Beta Kimia Vol 1 No 2 (2021): Volume 1, Nomor 2: November 2021
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v1i2.5580

Abstract

Penelitian ini bertujuan untuk mengetahui efektivitas pembelajaran kimia melalui pemanfaatan teknologi daring serta mengetahui perbedaan hasil belajar mahasiswa selama pandemi covid-19 menggunakan teknologi daring dibandingkan hasil belajar mahasiswa secara tatap muka/langsung di program studi pendidikan kimia Universitas Nusa Cendana. Metode penelitian yang digunakan adalah metode kombinasi penelitian kuantitatif dan kualitatif. Terdapat perbedaan hasil belajar mahasiswa sebelum pandemi covid-19 (pembelajaran luring) dan selama pandemi covid-19 (pembelajaran daring) pada mata kuliah Kimia Fisik 2, Statistika, Belajar dan Pembelajaran, Pengembangan Program Pembelajaran Kimia, dan Komputer untuk Pembelajaran Kimia, sementara untuk mata kuliah Kimia Dasar 2 tidak ada perbedaan hasil belajar mahasiswa sebelum pandemi covid-19 (pembelajaran luring) dan selama pandemi covid-19 (pembelajaran daring). Nilai rata-rata mahasiswa yang lebih tinggi pada saat pembelajaran daring dibandingkan pada saat pembelajaran luring yaitu mata kuliah Kimia Fisik 2, Statistika, dan Pengembangan Program Pembelajaran Kimia. Itu artinya bahwa pembelajaran daring pada mata kuliah tersebut tergolong efektif. Sementara nilai rata-rata mahasiswa yang lebih tinggi pada saat pembelajaran luring dibandingkan pada saat pembelajaran daring yaitu mata kuliah Belajar dan Pembelajaran dan Komputer untuk Pembelajaran Kimia. Itu artinya pembelajaran daring pada kedua mata kuliah itu masih kurang efektif sehingga perlu diperbaiki segala kekurangan yang ada. Mahasiswa dan dosen lebih cenderung menggunakan perpaduan aplikasi pembelajaran daring yang mudah digunakan guna mendukung kegiatan pembelajaran selama pandemi covid-19, seperti Zoom, Google Meet, Whatsapp, dan E-Learning. Ketertarikan mahasiswa dalam pembelajaran daring masih tergolong cukup. Hal ini dipengaruhi oleh beberapa faktor yang salah satunya adalah mahasiswa kadang-kadang mengalami kendala gangguan internet, sehingga pembelajaran daring menjadi terganggu
Implementasi Penuntun Praktikum IBM untuk Meningkatkan Hasil Belajar Kimia Siswa pada Materi Kimia Larutan Christianto, Heru
Jurnal Beta Kimia Vol 2 No 1 (2022): Volume 2, Nomor 1: Mei 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v2i1.7324

Abstract

Learning innovations through interactive practical guide is expected to improve the quality of education and human resources that can keep abreast of technology. The objective of this research was to know the difference between the students cognitive learning outcomes of students that learned to use IBM (Interactive Based Multimedia) practical guide compared with the students that learned to use practical guide in school and to determine the percentage of increase learning outcomes. The population in this research is all of eleventh grade students of SMAN 5 Medan. Samples were taken by purposive sampling. This research was conducted by using experimental with randomized control group pretest-posttest design. The results show that the implementation of IBM practical guide provided the cognitive learning was higher to students that learned to use IBM practical guide compared than results of students that learned to use practical guide in school. The percentage of increase learning outcomes to students that learned to use IBM practical guide was 74% with the high category, while the students that learned to use practical guide in school was 65 % with the medium category. Teachers are expected to be able to use IBM practical guide to improve students learning outcomes in chemical solution topic, at once improve the quality of education and human resources.
Perancangan Bahan Ajar Elektronik Berbasis Android Guna Meningkatkan Literasi Peserta Didik Sudirman, Sudirman; Maran, Bibiana Rume; Christianto, Heru; Parera, Lolita A. M.
Jurnal Beta Kimia Vol 2 No 2 (2022): Volume 2, Nomor 2: November 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v2i2.8806

Abstract

Research has been carried out with the title Designing Android-Based Electronic Teaching Materials to Improve Student Literacy. This study aims to determine: (1) the form of android-based electronic teaching materials on chemical equilibrium materials, (2) the level of validity of android-based electronic teaching materials on chemical equilibrium materials, and (3) student responses to the development of android-based electronic teaching materials on chemical equilibrium material. The development model used is the ADDIE model. The android-based electronic teaching material product that has been developed is in .apk format with a capacity of 74.6 megabytes named “Chemical equilibrium”. The results of the assessment of material and media experts on the level of validity of these electronic teaching materials have a very valid category with the percentage of overall validity being 96.19% and 90.20%, respectively. Meanwhile, the response of students to this electronic teaching material when the trial was carried out on average showed a very good response by getting the overall percentage was 97.78% in the small group trial and 96.33% in the large group trial. Thus, this android-based electronic teaching material on chemical equilibrium material is suitable for use in chemistry learnin activities as a source of independent learning and learning media. Keywords: Electronic Teaching Materials, Android, ISpring Suite 10, Website 2 APK Builder, Chemical Equilibrium
Pengembangan Video Pembelajaran Berbasis Animaker Pada Materi Kesetimbangan Kimia Di SMA/MA Praing, Rifaldo Landu; Parera, Lolita A. M.; Christianto, Heru; Siregar, Lamtiar Ferawaty
Jurnal Beta Kimia Vol 2 No 2 (2022): Volume 2, Nomor 2: November 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v2i2.9186

Abstract

Telah dilakukan penelitian dengan judul pengembangan video pembelajaran berbasis animaker pada materi kesetimbangan kimia di SMA/MA, bertujuan untuk mengetahui wujud pengembangan video pembelajaran yang dihasilkan berbasis Animaker pada materi kesetimbangan kimia di SMA/MA dan untuk mengetahui kelayakannya. Video pembelajaran berbasis animaker dibuat menggunakan Animaker.com, Microsoft PowerPoint dan aplikasi VN. Penelitian pengembangan ini dilakukan mengikuti alur model rancangan dari Sugiyono dengan sedikit penyesuaian. Prosedur untuk menghasilkan produk dibagi menjadi 8 tahap, yaitu: (1) potensi danmasalah, (2) pengumpulan data, (3) desain produk, (4) validasi produk, (5) revisi produk, (6) uji coba produk (skala kecil), (7) revisi produk, (8) uji coba produk (skala besar). Hasil penilaian ahli materi dan ahli media terhadap kelayakan video pembelajaran ini memiliki kategori sangat baik dengan presentase keidealan keseluruhan masing-masing 87,71% untuk ahli materi dan 92,35% untuk ahli media. Hasil penilaian uji kelompok kecil terhadap video pembelajaran berbasis animakerini sangat baik dengan persentase keidealan 100%, sedangkan uji kelompok besar terhadap video pembelajaran berbasis animaker ini sangat baik dengan persentase keidealan 100%. Berdasarkan hasil penilaian uji ahli dan uji lapangan yang terdiri atas uji kelompok kecil dan uji kelompok besar terhadap video pembelajaran berbasis animaker pada materi kesetimbangan kimia kelas XII untuk SMA/MA ini layak digunakan.
Etnokimia Pada Kain Tenun Songke Asal Desa Kakor Kecamatan Lembor Selatan Kabupaten Manggarai Barat, Nusa Tenggara Timur Lalang, Arvinda Ceniorita; Christianto, Heru; Lestarani, Dewi; Parera, Lolita A. M.; Murni, Maria Mersiana
Jurnal Beta Kimia Vol 3 No 2 (2023): Volume 3, Nomor 2: November 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v3i2.13602

Abstract

The study of chemistry from a cultural standpoint is known as ethnochemistry. If it is used in the learning process, it could improve students' accomplishment and retention in chemistry. Because learners knowledge originates from their own culture. However, the application of culture-based chemistry learning has problems integrating culture with chemistry materials. This is also Relevant with Kakor Village, in South Lembor Sub-district, West Manggarai Regency. So a study was conducted with the aim of examining the chemistry that exists in local cultural products, one of which is songke woven fabric. The research design used is qualitative with an ethnographic approach. The instruments used are observation, interviews and documentation that have been verified. The triangulation methodology was used to confirm the data, and then examined qualitatively, which has three stages: reduction, data presentation, and conclusions. The results demonstrate that chemistry plays a role in the production of songke woven fabric, namely in the phases of the yarn dyeing process when it comes to reaction rates, acid-base balance, and chemical bonding.
Konsistensi dan Dependabilitas Penilaian Microteaching pada Program Studi Pendidikan Kimia : Teori Generalisabilitas Lestarani, Dewi; Rosnawati, Raden; Anarato, Antonius Umbu; Lalang, Arvinda Ceniorita; Christianto, Heru; Ulfah, Maria; Rohi Bire, Winioliski L.O.; Lalang, Adrian R.
Jurnal Beta Kimia Vol 4 No 2 (2024): Volume 4, Nomor 2: November 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v4i2.19515

Abstract

Subjektivitas dan kurang konsistennya penilai/rater dalam proses penyekoran merupakan kritik yang umum ditujukan pada penilaian dalam pembelajaran. Oleh karena itu, artikel ini menyajikan hasil reliabilitas penilaian pada matakuliah Microteaching menggunakan tori generalisabilitas dengan desain px (i:r). Data yang dikumpulkan merupakan nilai ujian mahasiswa baik ujian pada nilai pengamatan di kelas, ujian tengah semester, ujian akhir semester. Responden berjumlah 30 orang, dengan 5 jenis tes dan dinilai oleh 3 rater yang berbeda. Analisis data pada pada artikel ini menggunakan program R untuk menghitung relative error varians; mendapatkan koefisien generalizabilitas dan coefficient dependability dari hasil tes secara empirik. Hasil penelitian didapatkan nilai eror terbesar terdapat pada person dan rater 1 dengan nilai 28.6 % dan 18%, nilai koefisien generalizabilitas sebesar 0.93 dan nilai koefisien dependability sebesar 0.69. Sehingga berdasarkan teori D maka dilakukan modifikasi dengan menambahkan jumlah rater agar nilai koefisien dependability menjadi > 0.7.
Toksisitas beberapa kategori asap cair dari kayu kusambi dan tempurung kelapa menggunakan metode Brine Shrimp Lethality Test Sarifudin, Kasimir; de Gatas, Adytia Dwipatria; Christianto, Heru; Parera, Parera
Media Sains Vol. 23 No. 2 (2023): Jurnal Media Sains
Publisher : Pendidikan MIPA Universitas Nusa Cendana

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

Abstract

This study aims to determine the level of toxicity in various categories of liquid smoke from kusambi wood and coconut shells. The liquid smoke produced from the pyrolysis of kusambi wood and coconut shells at ±400 ℃. Liquid smoke resulting from pyrolysis then distilled to achieve grade 3. Grade 3 liquid smoke filtered in zeolite and activated charcoal column to obtain grade 2 and  1 categories. The toxicity test was conducted using the BSLT method of 48-hour-old Artemia salina Leach shrimp larvae. The toxicity level of each liquid smoke was identified by the percentage of shrimp larvae mortality and determination of lethal concentration (LC50). Determination of total phenol content using a Shimadzu UV-Vis 1780 spectrophotometer. The results showed that toxicity of liquid smoke from the pyrolysis of kusambi wood and coconut shells is toxic, with LC50 <1000 ppm, while the Kusumbi wood and coconut shells liquid smoke from distillation processes, grade 2 and grade 1 are non-toxic, with the LC50 > 1000 ppm.
Co-Authors Anarato, Antonius Umbu de Gatas, Adytia Dwipatria Kasimir Sarifudin Lalang, Adrian R. Lalang, Arvinda C. Lalus, Fridom N. Lawa, Yosep Lestarani, Dewi Liu, Melani M.W. Maran, Bibiana Rume Maria Ulfah Murni, Maria Mersiana Parera, Lolita A. M. Parera, Parera Praing, Rifaldo Landu Raden Rosnawati Rohi Bire, Winioliski L.O. Siregar, Lamtiar Ferawaty Sudirman Sudirman Sunarko, Gilbertus F. M.