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All Journal HAYATI Journal of Biosciences Journal of Education Action Research Bioscientist : Jurnal Ilmiah Biologi
Sajidan
Program Studi Biosains, Program Pascasarjana, Universitas Sebelas Maret, Surakarta 57126, Jawa Tengah, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Immunology & microbiology Social Sciences

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Effect of Toxoplasma Infection Dosage on IgG, IgM, Fetus Weight and Body Length, and Necrosis of Placenta and Fetal Heart Nurinasari, Hafi; Sajidan; Purwanto, Bambang; Indarto, Dono; Subekti, Didik T
HAYATI Journal of Biosciences Vol. 31 No. 3 (2024): May 2024
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.31.3.596-602

Abstract

One of the most prevalent zoonotic illnesses in the world, toxoplasmosis, affects both humans and animals and is caused by the parasite Toxoplasma gondii. The infection will trigger the immune system to increase antibody production. This study aims to determine the dose of toxoplasma that causes necrosis in rats placental and fetal hearts. This study was laboratory experimental research with a Randomized Control Trial (RCT). The study design used a post-test only with a control group design. The Ig G variable obtained from the control group (CG) and treatment group 3 (TG3) is the most significant because the mean value difference was the largest (176.56). The Ig M variable obtained from the control group with treatment group 3 (TG3) is the most significant because the mean value difference is the largest (33.47). The fetus weight variable obtained from the control group with treatment group 3 (TG3) is the most significant because the mean value difference is the largest (2.6). The body length variable obtained from the control group between treatment group 3 (TG3) is the most significant because the mean value difference is the largest (1.26). There was a significant difference in placental tissue necrosis (p = 0.034) and heart (p = 0.025) between the control group (CG) and treatment group 3 (TG3). Therefore, there was a significant difference in Ig G, Ig M, fetus weight, body length, placental tissue necrosis, and fetal heart at the 10³ dose compared to the 102, 101, and normal doses.
Project-Based Learning Berbasis Entrepreneurship untuk Meningkatkan Kemampuan Berpikir Kreatif dan Kemandirian Siswa Kelas X Safrilla Rahma Marshella; Sajidan; Dwi Oetomo; Idam Ragil Widianto Atmojo
Journal of Education Action Reseach Vol 8 No 4 (2024): November
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jear.v8i4.84214

Abstract

Pembelajaran biologi yang dilakukan masih bersifat teoritis dengan menggunakan metode ceramah, siswa mendapatkan materi langsung dari guru sehingga siswa kurang inisiatif dalam belajar. Hasil persentase tingkat berpikir kreatif dan kemandirian siswa juga rendah yang ditunjukkan melalui penyebaran angket pada kegiatan prasiklus. Penelitian ini bertujuan untuk menganalisis model Project-based learning  berbasis entrepreneurship pada materi pencemaran lingkungan di kelas X terhadap tingkat berpikir kreatif dan kemandirian siswa. Penelitian ini merupakan Penelitian Tindakan Kelas (PTK). Subyek penelitian merupakan siswa kelas XE 5 berjumlah 36 siswa. Pengumpulan data penelitian diperoleh dengan tes berupa pemberian lembar tes yang disesuaikan dengan aspek berpikir kreatif yaitu fluency, flexibility, originality, dan elaboration dan non tes berupa lembar angket,  wawancara, dan dokumentasi. Teknik analisis data dilakukan dengan menggunakan teknik triangulasi data. Teknik validitas instrumen dilakukan dengan uji validitas. Hasil penelitian, menunjukkan terdapat peningkatan kemampuan berpikir kreatif dan kemandirian peserta didik. Hal ini dapat dibuktikan dengan kenaikan nilai dan persentase angket berpikir kreatif dan kemandirian peserta didik dari mulai pratindakan atau prasiklus, kemudian siklus 1, dan siklus 2. Simpulan menunjukkan penerapan model pembelajaran project-based learning berbasis entrepreneurship pada pembelajaran biologi untuk materi pencemaran lingkungan berdampak pada kemampuan berpikir kreatif dan kemandirian peserta didik.
Laju Pertumbuhan, Biomassa, dan Produksi Fikosianin Arthrospira platensis Perairan Pulau Jawa Pada Variasi Salinitas Lestari, Mutia Dinda; Sajidan; Pangastuti, Artini
Bioscientist : Jurnal Ilmiah Biologi Vol. 13 No. 4 (2025): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v13i4.18387

Abstract

This study aims to identify and determine the optimal salinity that can produce specific growth rates, maximum dry biomass production, and the highest phycocyanin content and productivity in local strains of A. platensis in the waters of Java Island. This study was conducted using three strains of Arthrospira platensis originating from Jepara, Bogor, and Yogyakarta with salinity variations of 10, 20, and 30 ppt and three replicates using walne fertilizer culture media. The cultures were cultivated for eight days to calculate the growth rate and measure the biomass and phycocyanin concentration. The results of this study showed that the biomass of A. platensis in all strains was maximum at 30 ppt. The specific growth rate of A. platensis strains JPR and BGR was fastest at 30 ppt, and phycocyanin production was highest at 20 ppt. Meanwhile, the MRP strain showed a fast growth rate at 10 ppt and the highest phycocyanin production at 30 ppt. Based on the results of this study, it can be concluded that each strain has a different strategy in responding to salinity in terms of growth rate, biomass, and phycocyanin production.
Co-Authors ARTINI PANGASTUTI Bambang Purwanto Didik T Subekti Dono Indarto Dwi Oetomo Idam Ragil Widianto Atmojo Lestari, Mutia Dinda Nurinasari, Hafi Safrilla Rahma Marshella