Article Per Year (5 Year)
p-Index From 2021 - 2026
2.203
P-Index
This Author published in this journals
All Journal Edumatsains Jurnal Penelitian Pendidikan IPA (JPPIPA) EDUKATIF : JURNAL ILMU PENDIDIKAN Jurnal Pengabdian UNDIKMA Inteligensi : Jurnal Ilmu Pendidikan Jurnal Pijar MIPA International Journal of Research in STEM Education
Leonard R. Hutasoit
Universitas Terbuka
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Nursing Physics Public Health Social Sciences Other

Published : 12 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 12 Documents
Search

 1   2 
Bioaccumulation of Pb in the Gills of Perna viridis (Bivalvia: Mytilidae) in Jakarta Bay, Indonesia and its Histological Alteration Rony Marsyal Kunda; Maman Rumanta; Leonard Raden Hutasoit
Jurnal Penelitian Pendidikan IPA Vol 10 No 5 (2024): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i5.7109

Abstract

Pollution in Jakarta Bay associated with terrestrial run-off and eutrophication. Bivalves have been recognized as aquatic organisms that play the most dominant role in aquatic ecosystems. Pb is an element that in many cases causes health problems in the liver, kidneys, hematopoietic system and nervous system. This study aims to analyze the bioaccumulation of Pb in the gills of P. viridis in Jakarta Bay, and its histological changes. Bioaccumulation analysis using the AAS and histology changes using transmission electron microscopy (TEM) methods. The results of AAS, showed that the value of Pb concentration in gill tissue at the two seasons did not show a noticeable difference. Pb concentrations in gills were lower at 1, 4, and 5 than at 2 and 3 stations. The results of ultrastructure analysis as an impact of Pb accumulation showed that thickening of the nucleus membrane, and a decrease in the number of microvilli. The thickening of the nucleus membrane, and the decrease in the number of microvilli are cellular responses to the entry of the Pb heavy metal into the cell. Besides, the results of this study showed inflammation, a decrease in the number of mitochondria, as well as causing cristae to be empty.
Teacher Misconceptions: A Phenomenon of the Lack of Knowledge in Science Subjects Dyah Aniza Kismiati; Leonard R. Hutasoit
Jurnal Penelitian Pendidikan IPA Vol 10 No 6 (2024): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i6.7226

Abstract

Qualified teachers are a cornerstone of successful learning. This study aims to determine the understanding of teachers in elementary schools on the concept of photosynthesis in science subjects in elementary schools. This type of research is survey research. This survey was conducted on 29 elementary school teachers in South Tangerang. Sampling is done randomly (random). The instrument used is a concept statement instrument of 10 statements. The analysis that will be carried out is descriptive by looking at the percentage of misconception scores in each question item. The results showed that there were 3 question items that showed the highest level of misconceptions, with an error range of 86.2% on the presence of chlorophyll, 79.30% on the photosynthesis time item, also 72.4% on results of photosynthesis. The degree of moderate misconception is that 69.00% in statement items related to the role of light in photosynthesis and 62.10% on the photosynthetic product statement item, and. In addition to filling out questionnaires, interviews were also conducted to explore information on why the phenomenon of misconceptions can occur in teachers. The interview results showed that most of the teachers who were sampled for research and teaching science in elementary schools had different educational backgrounds (other than science) as much as 66.00%, 28.00% had science education backgrounds and 7.00% came from other educational backgrounds.
Co-Authors Anna Ratnaningsih Anna Ratnaningsih, Anna Danang Budi Setyawan Dola Suciana Gusti Nurdin Kismiati, Dyah Aniza Krisna Iryani Maman Rumanta Maman Rumanta Mestika Sekarwinahyu Mestika Sekarwinahyu Nurhasanah Nurhasanah Prasetyarti Utami Rony Marsyal Kunda Tri Wahyuningsih Tri Wahyuningsih Tri Wahyuningsih Ucu Rahayu Udan Kusmawan