Chemical components demonstrating antiinsectan properties were isolated and identified from crude resins of fourDipterocarpus species. The most active compounds against Southeast Asian termites (Neotermes spp.) proved to be alloaromadendrene, humulene, and caryophyllene. These results suggest that these sesquiterpenes, which occur in many dipterocarps, play an important role in defense against insects.

Penelitian ini dilakukan untuk mengetahui pengaruh penggunaan model pembelajaran Contextual Teaching and Learning (CTL) berbantuan alat peraga terhadap hasil belajar siswa pada materi sistem pencernaan manusia. Penelitian ini dilaksanakan di SMP Negeri 4 Melonguane pada semester ganjil tahun ajaran 2019-2020. Penelitian ini menggunakan metode eksperimen. Populasi dalam penelitian ini adalah seluruh siswa kelas VIII yang terdiri dari 2 kelas. Pengambilan sampel dilakukan pada 2 kelas yang tersedia, dengan jumlah masing-masing 19 siswa. Kelas VIII-A sebagai kelas eksperimen dan kelas VIII-B sebagai kelas kontrol. Data hasil belajar siswa diperoleh dari pretest dan posttest. Hasil penelitian menunjukkan bahwa pada uji perbedaan dua rerata (uji-t) pada taraf nyata 0,05 diperoleh  thitung = 3,55 dan ttabel = 2,10 sehingga menunjukkan bahwa rata-rata hasil belajar siswa yang menggunakan model pembelajaran CTL lebih tinggi dibandingkan rata-rata hasil belajar siswa yang menggunakan model konvensional. Sehingga, dapat disimpulkan bahwa terdapat pengaruh model pembelajaran CTL berbantuan alat peraga terhadap hasil belajar siswa pada materi sistem pencernaan manusia di kelas VIII SMP Negeri 4 Melonguane.

ABSTRAKTujuan dalam penelitian ini adalah (1) mengembangkan media pembelajaran sains melalui video animasi berbasis PBL pada mahasiswa IPA semester IV. (2) meningkatkan hasil belajar mahasiswa pada mata kuliah IPA-2 dengan menggunakan media pembelajaran sains melalui video animasi pada mahasiswa semester IV PRODI IPA Universitas Negeri Manado. Penelitian pengembangan ini menggunakan metode Research and Developmen (R &D) dengan model Dick dan Carrey yang meliputi 7 tahap yaitu perencanaan, studi eksplorasi, pengembangan bentuk awal produk, instrument pengumpulan dan analisi data, revisi berdasarkan hasil validasi dan desiminasi produk. subjek uji coba pada penelitian dan pengembangan ini di review oleh, (1) orang ahli pembelajaran,  (1) orang ahli media, uji kelompok kecil, uji coba lapangan atau kelompok besar,  sampel diambil pada 1 kelas dengan jumlah 21 orang mahasiswa. Nilai thitung < ttabel (-15,518 < -2,086) dan signifikansi < 0,05 (0,000 < 0,05), kesimpulan dalam penelitian ini bahwa proses pembelajaran yang diberi perlakuan media pembelajaran sains melalui video animasi berbasis PBL, dapat meningkatkan nilai rata-rata pada mata kuliah IPA-2 materi sistem pencernaan makanan pada manusia.Kata kunci : Media Pembelajaran Sains, Problem Based Learning, Video Animasi. ABSTRACTPurpose in this study is (1)To  develop learning media science through video animation based PBL (Problem Based Learning) at students IPA fourth semester. (2) improve student learning outcomes in the course IPA-2 by using learning media science through video animation on student semester IV department IPA Manado State University. Research the  development using the methods Research and Developmen (R &D) model with  Dick and Care which includes 7 stages. The subject of this research and development in the review by (1) expert lecturers learning, (1) media expert lectures, small group test, field trials or large group, samples were taken at 1 class with 21 students. Value thit < ttab (-15,518 < -2,086) and significance < 0,05 (0,000 < 0,05), conclusion in this study that the learn process is treated by media science learn through video-based animation PBL, can increase the average value of subject IPA-2, digestive system in humans.Keywords: Learning Media Science,  PBL (Problem Based Learnig), Animated-Video.

This study aims to develop teaching materials using a scientific approach to improve student's learning outcomes in the static electricity concepts. This study refers to Research and Development method following the stages of implementation according to Borg and Gall. The trial subjects consisted of theoretical and empirical trials. Theoretical trials involved experts in designing teaching and science learning materials, while the empirical trial comprised of students of grade IX. The instruments used were interviews, questionnaires, and test. The data obtained were analysed descriptively and statistically. The results show that the validation of teaching and learning materials by experts are included in the very strong category with a value of 91 % and 93 % respectively. Moreover, the teaching materials with a scientific approach can improve student learning outcomes.

The online learning policy was implemented during the COVID-19 pandemic in various countries around the world. Problems arise in learning biology that requires laboratory experiment activities. This research provides an innovation in entomology learning with a project-based learning method using insect biodiversity in the local ecosystem, namely Lake Tondano. This study aims to determine the ability of science process skills and student responses using the project-based learning method. Project-based learning is one of the methods established for the independent learning process to learn the independent curriculum. The research was conducted with an exploratory, descriptive research method. Science process skills and student project products are measured using a rubric. Student learning outcomes are measured using quiz questions with the google form application.Meanwhile, student responses were measured using a questionnaire. The study results showed that the science process skills of students who were taught using the Project-based learning method were in the good and very good categories. The resulting project output is a practical guide based on the assessment rubric which is in good and very good grades. Student responses regarding the application of Project based learning in entomology courses are in the agree and strongly agree categories. Student learning outcomes showed an average in the good and very good categories. The application of project-based learning can stimulate the ability of science processes and student learning outcomes in entomology courses. Project-based learning is very appropriate to be applied to fields of science that require a lot of experimental activities. Because it is carried out in small research groups, the project-based learning method is appropriate for learning during the COVID-19 pandemic.