This study aimed at determining the effect of recycle materials usage for science practicum on students' basic science process skills of the Open University, Surakarta. Recycle materials are the term used for the obtained materials and equipment from the students’ environment by taking back the garbage or secondhand objects into goods or new products which have a benefit for practicum activities. Randomized posttest only control group design was applied in this study and involving 83 students which divided into experimental class and control class. Collected data were science process skills test and questionnaire. The results of this study obtained Kruskal Wallis test result of 0.000<0.05. So, there was effect of recycle materials usage for science practicum on students’ science process skills. Students also provided positive feedback on the use of recycle materials for science lab activities.
This research aims to improve the motivation and student scientific writing skill (SCWS) by applying the integration of Simas eric and Blended learning models. This study is a classroom action research method conducted in one of the classes in the biology education program for the National student scientific week (PIMNAS) project of biology education Program, Universitas Tidar. The results of the study were analyzed descriptively. The results showed an increase in students’ motivation and learning outcomes. Students’ learning motivation on average increased by 10.59% and SCWS on average increased by 33.28%. The results of this study can be an alternative reference for lecturers or educators as an effort to improve student learning motivation so that the learning outcomes obtained can increase. Therefore, the integration of Simas eric with google classroom can enhance students’ motivation and SCWS Subjects at the biology students.
The aims of this study are to determine the feasibility of Bengawan Solo River water for irrigation of rice field in Sragen, Central Java and to find solution to the problem. The data used in this study were obtained from various literatures related to the issues discussed. The collected data were then selected and analyzed with descriptive argumentative. The result indicates that the water quality of Bengawan Solo River has dropped below the water quality standard grade IV according to Government Regulation Number 82 Year 2001. The use of water from this river has caused the quality of rice to decline below the rice quality standard according to Indonesian National Standard (SNI) 01.6128-2008 due to the bioaccumulation of heavy metals on rice crops, i.e. copper (Cu), mercury (Hg), cadmium (Cd), and Chromium (Cr) exceeded the threshold. Solution proposed to overcome this problem is with counseling programs to farmers conducted by relevant agencies on the use of rice field pollution control technology by physics, chemistry, and biology.
ABSTRAKPenelitian ini bertujuan untuk mengembangkan sebuah respirometer sederhana yang terbuat dari bahan daur ulang untuk pembelajaran praktikum IPA. Penelitian ini menggunakan metode penelitian dan pengembangan (Research and Development) model 3-D (Define, Design, Develop). Hasil penelitian ini berupa respirometer sederhana dari bahan daur ulang yang mampu digunakan secara akurat mengukur kecepatan respirasi makhluk hidup. Hasil pengembangan ini kemudian digunakan untuk mengukur kecepatan respirasi kecambah. Kegiatan pembelajaran IPA merupakan penemuan sebuah konsep. Resipirometer sederhana ini merupakan peralatan alternatif atas ketiadaan respirometer pabrik untuk kegiatan praktikum. Kelebihan respirometer daur ulang ini diantaranya adalah dapat mengukur secara akurat, lebih murah, dan dapat mengembangkan kreativitas siswa.Kata Kunci: resipirometer sederhana, bahan daur ulang, praktikum respirasi
Majority of agricultural activity in Indonesia still relies on rainwater for irrigation. In the dry season, there are many non-productive agricultural lands. It leads to decrease in farmers’ income. To solve this problem, Aquaponic Planting System was offered, but the system is complicated. It needs adequate oxygen and proper pH to make nitrification bacteria alive to convert NH3 to NO3- and NO2. Therefore, a system which controls oxygen and pH is needed. For pH calibration, a curve fitting method was used to get an accurate measurement. For oxygen calibration, saturated dissolved oxygen water was used. It was obtained using a Potentiometric method. Moreover, Simple Moving Average was used to get a stable reading.
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