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All Journal Journal of Biology Education Biosaintifika: Journal of Biology & Biology Education
F. Putut Martin Herry Bodijanto, F. Putut Martin Herry
FMIPA UNNES Gd D6 Lt 1 Jln. Raya Sekaran- Gunungpati- Semarang 50299 Telp./Fax. (024) 8508033
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education

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Uji Kandungan Timbal (Pb) dalam Daun Tanaman Peneduh di Jalan Protokol Kota Semarang Istiaroh, Pawit Dwi; Martuti, Nana Kariada Tri; Bodijanto, F. Putut Martin Herry
Biosaintifika: Journal of Biology & Biology Education Vol 6, No 1 (2014): March 2014
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v6i1.3786

Abstract

Gas buang yang dihasilkan oleh kendaraan bermotor pengguna bahan bakar bensin bertimbal mengemisikan Pb ke dalam lingkungan dan berpotensi terserap ke dalam jaringan daun tanaman peneduh jalan. Penelitian bertujuan untuk menguji kandungan timbal (Pb) dalam daun tanaman peneduh di jalan protokol Kota Semarang. Sampel penelitian adalah daun angsana (Pterocarpus indicus Willd), glodokan (Polyalthia longifolia Bent & Hook. F) dan mahoni (Swietenia mahagoni (L.) Jacq.) yang dominan digunakan sebagai peneduh di lima jalan protokol Kota Semarang yaitu Jl. Kalibanteng, Jl. Pemuda, Jl. Brigjen Katamso, Jl. Kaligawe dan Jl. Setyabudi. Kandungan Pb dalam daun tanaman angsana, glodokan dan mahoni diuji menggunakan metode AAS (Atomic Absorption Spectrophotometery) di Laboratorium Balai Besar Teknologi Pencegahan Pencemaran Industri (BBTPPI) Semarang. Hasil penelitian ditemukan kandungan Pb dalam daun tanaman peneduh di jalan protokol Kota Semarang. Kandungan Pb dalam daun tertinggi 0,05 ppm/g daun basah terdapat pada tanaman angsana dan terendah sebesar 0,01 ppm/g terdapat pada tanaman glodokan dan mahoni. Dari hasil penelitian disimpulkan bahwa kandungan Pb dalam daun tanaman peneduh di jalan protokol Kota Semarang berkisar 0,01-0,05 ppm/g daun basah dan tergolong rendah dibawah kadar normal Pb dalam tanaman yaitu 0,5-3,0 ppm.Exhaust gases produced by motor vehicle users leaded gasoline emits Pb into the environment and potentially absorbed into the leaf tissue of plants along the roadside. The study aimed to examine the content of lead (Pb) in the shade plant leaves in the Semarang City road protocol. Samples were angsana leaves (Pterocarpus indicus Willd), glodokan (Polyalthia longifolia Bent & Hook. F) and mahogany (Swietenia mahagoni (L.) Jacq.). They were predominantly used as a shade in five main streets of Semarang is Kalibanteng St, Youth St, Brig Katamso St, Kaligawe St and Setyabudi St. The content of Pb in the Angsana, glodokan and mahogany leaves were tested using AAS (Atomic Absorption Spectrophotometery) method in Great Hall of The Pollution Prevention Technology Laboratory Semarang. The results showed that the content of Pb was found in the shade plant leaves in the Semarang road protocol. The highest Pb content in leaves was 0.05 ppm/g wet leaves at Angsana plants and the lowest was 0.01 ppm/g contained in mahogany and glodokan plants. Based on the results of this study, it concluded that the content of Pb in the shade plant leaves in the Semarang protocol ranged from 0.01 to 0.05 ppm/g wet leaves and relatively low under normal levels of Pb in plants is 0.5 to 3.0 ppm.
The Effectiveness of Metacognition Strategy by Snowball Throwing on Student’s Metacognition Ability and Learning Outcomes on Reproduction System Material Rahayu, Ida Putri; Sukaesih, Sri; Bodijanto, F. Putut Martin Herry
Journal of Biology Education Vol 9 No 2 (2020): August 2020
Publisher : FMIPA UNNES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbe.v9i2.29440

Abstract

The purpose of this study is to analyze the effectiveness of the application of metacognition strategy by snowball throwing-assisted toward students' metacognitive ability and learning outcomes in reproductive system material. The study design uses Pre-experimental design with a one-shot case study pattern applied to class XI MIPA 4 and XI MIPA 7 of Academic Year 2017/2018. The sampling technique is purposive sampling. Student learning outcomes data are analyzed using classical completeness test. Data on the ability of metacognition is analyzed using a scaled category of metacognition abilities. This study is effective if it is able to reach indicators of effectiveness, namely the average final grade of metacognition ability reaches ≥ 68 with the ok-super scale, and classical completeness of learning outcomes reaches ≥ 85%. Data on metacognition ability is obtained from the value of the monitoring sheet and the value of student learning journals. The metacognitive abilities of the two classes can reach an average final score of 82.45, indicating that students already have awareness in carrying out thinking processes which include the optimal input-elaboration-output stage. Student learning outcomes data obtained from the LDS value, the value of the snowball throwing paper and the posttest value. The learning outcomes of both classes were able to achieve classical completeness on average by 92.5%. The conclusion of this study is the effective snowball throwing-assisted metacognition strategy applied to reproductive system material in SMA N 1 Jakenan.
The Effectiveness of Metacognition Strategy by Snowball Throwing on Student’s Metacognition Ability and Learning Outcomes on Reproduction System Material Rahayu, Ida Putri; Sukaesih, Sri; Bodijanto, F. Putut Martin Herry
Journal of Biology Education Vol 9 No 2 (2020): August 2020
Publisher : FMIPA UNNES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbe.v9i2.29440

Abstract

The purpose of this study is to analyze the effectiveness of the application of metacognition strategy by snowball throwing-assisted toward students' metacognitive ability and learning outcomes in reproductive system material. The study design uses Pre-experimental design with a one-shot case study pattern applied to class XI MIPA 4 and XI MIPA 7 of Academic Year 2017/2018. The sampling technique is purposive sampling. Student learning outcomes data are analyzed using classical completeness test. Data on the ability of metacognition is analyzed using a scaled category of metacognition abilities. This study is effective if it is able to reach indicators of effectiveness, namely the average final grade of metacognition ability reaches ≥ 68 with the ok-super scale, and classical completeness of learning outcomes reaches ≥ 85%. Data on metacognition ability is obtained from the value of the monitoring sheet and the value of student learning journals. The metacognitive abilities of the two classes can reach an average final score of 82.45, indicating that students already have awareness in carrying out thinking processes which include the optimal input-elaboration-output stage. Student learning outcomes data obtained from the LDS value, the value of the snowball throwing paper and the posttest value. The learning outcomes of both classes were able to achieve classical completeness on average by 92.5%. The conclusion of this study is the effective snowball throwing-assisted metacognition strategy applied to reproductive system material in SMA N 1 Jakenan.
Co-Authors Nana Kariada Trimartuti Pawit Dwi Istiaroh, Pawit Dwi Rahayu, Ida Putri Sri Sukaesih