Articles

Found 2 Documents
Search

PENGARUH JUS DAUN JATI BELANDA (Guazuma ulmifolia Lamk.)TERHADAP BERAT DAN HISTOLOGI GINJAL MENCIT (Mus musculus L.) GALUR SWISS WEBSTER Andalusia, Messa; Soesilawati, Soesy Asiah; Shintawati, Rita
Formica Online Vol 1, No 1 (2014): Formica Online
Publisher : Jurusan Pendidikan Biologi FPMIPA UPI

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

Abstract

Telah dilakukan penelitian mengenai pengaruh jus daun Jati Belanda terhadap berat dan histologi ginjal mencit. Penelitian eksperimen ini menggunakan Rancangan Acak Lengkap (RAL) dengan empat kali pengulangan dan enam dosis perlakuan (0,00 g/BB/hari; 0,05 g/BB/hari; 0,10 g/BB/hari; 0,15 g/BB/hari; 0,20 g/BB/hari; 0,25 g/BB/hari) digunakan dalam penelitian ini. Mencit jantan usia empat bulan diberi perlakuan jus daun Jati Belanda dengan cara gavage selama 14 hari. Pada hari ke-15 mencit dimatikan dengan cara dislokasi leher kemudian dibedah dan ginjalnya diambil untuk kemudian ditimbang dan dibuat preparat histologinya. Pembuatan preparat dilakukan dengan metode parafin dengan pewarnaan Hematoxylin Erlich-Eosin untuk melihat struktur jaringan ginjal. Analisis data dilakukan baik secara kualitatif maupun kuantitatif. Hasil penelitian menunjukkan pemberian jus daun Jati Belanda mulai dosis 0,10 g/BB/hari hingga 0,25 g/BB/hari secara signifikan meningkatkan berat ginjal. Pengaruh jus jati belanda terhadap berat ginjal yaitu sebesar 86%. Rata-rata berat ginjal mencit semakin meningkat seiring dengan semakin tingginya dosis jus daun Jati Belanda yang diberikan. Adapun rata-rata diameter tubulus, diameter lumen, serta ketebalan sel epitel semakin meningkat seiring dengan semakin berat ukuran ginjal. Dengan demikian dapat disimpulkan bahwa  penggunaan jus daun Jati Belanda dalam rentang dosis antara 0,10 g/BB/hari hingga 0,25 g/BB/hari aman dikonsumsi bagi tubuh dalam jangka waktu singkat. Kata kunci : Guazuma ulmifolia Lamk., tubulus, lumen, Mus musculus L.
Hubungan Penguasaan Konsep dengan Kemampuan Menilai Kredibilitas Sumber Informasi Menggunakan Problem Based Learning (PBL) pada Materi Pencemaran Lingkungan Warsita, Adnes Ningrum; Kusumastuti, Mimin Nurjhani; Shintawati, Rita
Assimilation: Indonesian Journal of Biology Education Vol 1, No 1 (2018): Assimilation: Indonesian Journal of Biology Education
Publisher : Biology Education Department, Indonesia University of Education

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

Abstract

The aim of this research was to reveal a relationship between students' concepts mastery on the matter of environmental pollution with the ability to assess the credibility of the source through problem-based learning. The type of research is pre-experiment which analyzed by correlation method. Then the study design using the post-test only design with a total sample of 39 students of grade 10 and for sampling technique uses simple-random sampling technique. Student’s concepts mastery on material environmental pollution are identified using the instrument in the form of multiple choice questions and essay question, while the level of ability to assess the credibility of the source is identified based on the accuracy of the students sort the level of credibility of source and the students' answers on the criteria that they use to sort the credibility of the source, which is scored with a rubric that has been made. The average score of students' mastery of concepts is 74.1 and quite good. In addition, through one sample t-test was also proven when problem-based learning have a real or significant influence on students' mastery of concepts in the matter of environmental pollution. Correlation test is then performed using the non parametric statistical using Spearman correlation, and got score 0.82 for correlation coefficient, which means having a high correlation with a contribution of 67.5%. Thus the conclusions that can be drawn is that there is a high correlation between students' concepts mastery on the matter of environmental pollution with the ability to assess the credibility of the source through problem-based learning.