Rambai laut (Sonneratia caseolaris L. Engl) is one of the typical plants of Borneo that the leaves are empirically used by the community as a medicinal plant. Compounds from plants can be obtained by extraction. The yield rendement on the extraction process can be influenced by several factors, one of which is the method of extraction. This study aims to determine the effect of extraction methods and the amount of yield produced on rambai laut extracts. The research design is experimental with descriptive analysis. Rambai laut which has become powder then in extraction by using maseration method, infundation method, reflux method and soxhletasi method. The result of rendement is then analyzed using statistic. Soxhletasi method yield average value of rendemen that is equal to 28,38%, reflux equal to 25,57%, maseration equal to 21,28% and infundasi with average value of rendemen that is equal to 17,20%. The soxhletation method yields the highest average yield value and infundation with the lowest average yield value. The result of staitistic test shows that the extraction method has an effect on each rendement with p value = 0,024 <α = 0,05.
Penelitian ini merupakan penelitian deskriptif kualitatif. Subjek penelitian adalah siswa kelas VIII SMP Negeri 10 Tangerang. Data yang diperoleh dari penelitian ini adalah data uji kemampuan pemecahan masalah matematika seperti tes tulis dan wawancara. Analisis data dilakukan berdasarkan hasil uji tulis dan wawancara, kemudian dilakukan teknik triangulasi untuk mendapatkan data penelitian yang valid. Hasilnya menunjukkan bahwa siswa yang memiliki kemampuan tinggi, baik laki-laki maupun perempuan mampu memahami masalahnya dengan baik, memiliki rencana pemecahan dan dapat menyelesaikan penyelesaian masalah sesuai dengan rencana dan dapat melakukan pengecekan ulang. Sedangkan siswa yang memiliki kemampuan menengah, baik laki-laki maupun perempuan hampir memiliki kemampuan yang sama dengan siswa yang memiliki kemampuan tinggi, bedanya hanya pada langkah-langkah untuk memecahkan masalah dan pengecekan ulang. Siswa yang memiliki kemampuan menengah kurang memahami perhitungan dalam jumlah operasi, jadi ada kesalahan dalam proses perhitungan yang hasilnya tidak benar dan dalam aspek pengecekan, siswa yang memiliki kemampuan menengah hanya memeriksa sebagian saja. Lain kasus siswa yang memiliki kemampuan rendah. Siswa yang memiliki kemampuan rendah, baik laki-laki maupun perempuan tidak bisa menyelesaikan masalah secara tuntas, karena belum mengetahui rencana penyelesaian yang belum matang, jadi tidak ada hasilnya. Sedangkan pada aspek pengecekan, siswa yang memiliki kemampuan rendah hanya melihat proses perhitungan, tidak mengecek hasilnya benar atau salah, karena siswa yang memiliki kemampuan rendah tidak ada hasilnya, sehingga mereka tidak mengecek hasil yang diperoleh.Kata Kunci: kemampuan pemecahan masalah
Peatland wildfires, especially in tropical ecosystems, are often caused by drought, and lead to smoke and other related problems in all aspects of community life in Indonesia, especially in Central Kalimantan. Drought is worsened by the number of dry days in the dry season, known as the El Niño phenomenon, and the drainage system in a peatland. Additionally, drought decreases the water table and increases the probability of occurrence of wildfires in peatland areas. This study aims to modify the numerical formula of the drought factor (DFt) in the Keetch–Byram drought index (KBDI) based on tropical peatland wildfire conditions in Central Kalimantan during the El Niño phenomenon in 2015. Furthermore, it applies a revised peatland water table reference of 400 mm below the ground surface, based on previous research and the Government regulation on peatland ecosystem protection and management in Indonesia. These El Niño conditions caused a rain decline of approximately 35% in Block A, Ex-Mega Rice Project, Mantangai sub-District, Kapuas District, Central Kalimantan Province. The modified KBDI is compared with the Number of Fire Alerts (NFA) using NASA’s Active Fire Data in 2015. The analysis results demonstrate that the modified DFt under tropical peatland conditions leads to an increase in the drought index value, beginning on the driest days between July and November 2015. The value of the KBDI drought index increases from the high to the extreme index from September to November 2015, when as many as 61 extreme drought indices became indicators for peatland wildfire risk assessment. The extreme KBDI is directly proportional to the NFA recorded during 2015, and the highest number of fire alerts is observed for October 2015, with 1746 fire alerts within 31 days and extreme drought indices from 27 days. Hence, this modified formula is suitable for wildfire conditions on this peatland in Central Kalimantan. Overall, the modified DFt can be successfully applied to the El Niño phenomenon in 2015.
Mata pelajaran bahasa Indonesia merupakan salah satu mata pelajaran yang paling banyak mendapat perhatian atau sorotan dari pendidik karena pembelajarannya yang sangat berkaitan erat dengan lingkungan belajar siswa (Piliang et al., 2014). Pembelajaran bahasa Indonesia pun juga merupakan pembelajaran yang sangat berkaitan dengan hal-hal yang ada di sekitar siswa. Salah satu faktor utama yang mendukung siswa dalam pembelajaran tersebut ialah faktor lingkungan. Karena lingkungan berpengaruh di dalam proses kegiatan belajar mengajar. Serta lingkungan juga merupakan hal yang dapat menunjang pelaksanaan kegiatan belajar mengajar di sekolah. Pembelajaran yang berkaitan dengan lingkungan ini adalah salah satu cara untuk menjaga, merawat, dan melestarikan lingkungan agar terhindar dari kerusakan. Di Indonesia masalah lingkungan bukan lagi masalah yang baru, maka dari itu kita harus berupaya melestarikan lingkungan yang ada agar makhluk hidup yang lainnya dapat hidup dengan aman dan tentram. Pendidikan lingkungan dalam pembelajaran bahasa Indonesia sangat memberikan pelajaran bagi manusia untuk selalu menjaga alam dan lingkungan serta memperhatikanlingkungan agar tidak rusak.
University of Lambung Mangkurat (ULM) has an academic information system that can facilitate access to information and provide quality academic services. One of the ULM academic information system services is the Portal Akademik Dosen ULM. Since its release in 2016, there has been no research regarding the evaluation of the Portal Akademik Dosen ULM. Most of users feel that the interface of the Portal Akademik Dosen ULM needs to be improved to make it more attractive, and needs improvements in several features. In connection with the important function of the Portal Akademik Dosen ULM, an evaluation is needed to assess the success of implementing the information system. This study aims to evaluate the usability of the Portal Akademik Dosen ULM. The methods used are the User Experience Questionnaire (UEQ) and Heuristic Walkthrough. Based on the results of the UEQ questionnaire from 56 respondents, it was found that the aspects of attractiveness, perspicuity, efficiency, dependability, and stimulation got positive values, while the novelty aspect got a neutral value. For the evaluation results with Heuristic Walkthrough method which involved 4 evaluators, found 33 problems at the Cognitive Walkthrough stage, and as many as 21 problems at the Heuristic Evaluation stage with an average severity rating of 13.4. The overall results of the evaluation showed that the Portal Akademik Dosen ULM needs to be improved on novelty items and need to be improved to reduce the number of problems.
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