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Bioscientist : Jurnal Ilmiah Biologi
Published by Universitas Pendidikan Mandalika
ISSN : 23385006     EISSN : 26544571     DOI : https://doi.org/10.33394
Core Subject : Science, Education, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Social Sciences
Bioscientist : Jurnal Ilmiah Biologi (BJIB), receiving and publishing article in the form of research (scientific article) in the field of biology education and utilization of biological research in learning. Moreover, this journal bridges the gap between research and practice, providing information, ideas and opinion, in addition to critical examinations of biology research and teaching. Through the coverage of policy and curriculum developments, the latest results of research into the teaching, learning and assessment of biology are brought to the fore. Special emphasize are as follow: 1. Research on Learning Biology (Biology Learning Materials at All Education Levels). 2. Pure Research of Biology Developed or Studied to the Sources, Materials, or Instructional Media Biology (Biology Learning Materials at All Education Levels and Application in Society). 3. Curriculum of Biology Education at all Education Levels. 4. Class Action Research (CAR) and Lesson Study in Biology. 5. Other Qualitative Research of Biology Education. 6. The School Management and Biology/Science Laboratory Management. 7. Biology Learning Evaluation. 8. Teacher Professional Issues/Trends in Biology Education. 9. Another Study for the Scope of Biology Education. 10. Research on Environmental Education.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 123 Documents
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Search results for , issue "Vol 12, No 1 (2024): June" : 123 Documents clear
Produksi Kotoran Cacing Tanah dan Hubungannya dengan Kelimpahan Cacing Tanah pada Ekosistem Alami dan Ekosistem Buatan Regina Jody; Darmi Darmi; Rizwar Rizwar
Bioscientist : Jurnal Ilmiah Biologi Vol 12, No 1 (2024): June
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.v12i1.11550

Abstract

The presence of earthworms in an ecosystem can improve soil quality through physical, chemical and biological properties. The activity of earthworms in producing feces also has an important role in increasing soil fertility. This research aims to analyze the production of earthworm feces and its relationship with the abundance of earthworms in natural and artificial ecosystems. Determining location points uses the Cluster Sampling method, namely natural and artificial ecosystems. Sampling of earthworms and their feces used the line transect method with a length of 100 meters and plots were created along the transect lines to observe the population and production of earthworm feces with 20 replicate plots at each location. Data analysis includes average feces weight, number of earthworm feces, and correlation analysis. Morphological data on earthworm droppings were analyzed descriptively. The results of this research show that in natural ecosystems there are 2 forms of earthworm feces, namely granular and globular types, whereas in artificial ecosystems there is only 1 form of earthworm feces, namely globular. Earthworm feces production is higher in natural ecosystems than in artificial ecosystems. The relationship between dung production (number of deposits and weight of dung deposits) of earthworms with the number and biomass of earthworms shows a significant relationship with a moderate correlation category (<1), while the relationship between earthworm density and worm biomass correlates significantly with a strong correlation category (1).
Penetapan Kadar Kuersetin pada Obat Herbal yang Mengandung Ekstrak Tempuyung (Sonchus arvensis) Menggunakan KLT Densitometri Asih Imulda Hari Purwani; Krisna Kharisma Pertiwi; Dwi Wahyuni; Rachma Nurhayati
Bioscientist : Jurnal Ilmiah Biologi Vol 12, No 1 (2024): June
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.v12i1.11260

Abstract

Quercetin are the main marker compounds in extracts of Sonchus arvensis which show nephrolithiasis activity. For quality control of herbal medicines, Densitometric Thin Layer Chromatography (TLC) method has been developed in this study using quercetin as phytochemical markers. Objective: Determination for quercetin in herbal medicines. Determination of quercetin by determining the composition of the mobile phase, the wavelength of the analysis, the saturation time, the elution distance and the volume of the spot. The parameters observed in the optimization method and stability test are area, retardation factor (Rf), peak shape and resolution (Rs). The composition of selected mobile phase which results good separation and symmetrical peak shape is chloroform: methanol: dichloromethane: acetonitrile: formic acid (6: 2: 2: 0.05: 0.05 v/v/v/v/v) with a wavelength of 335 nm, time of saturation is 30 minutes, elution distance is 8 cm, volume of spots is 10 µL and Rf 0.48. In this study, it was shown that there were no factors that had a significant effect so that the method could be applied for the determination of quercetin levels in herbal medicines.The research data showed that the range of levels on quercetin 3.26%.
Kadar Silika (SiO2) terhadap Kelimpahan Diatom Bentik di Sungai Jamblang Kabupaten Cirebon Maharani Zahiratun Haque; Norma Afiati; Oktavianto Eko Jati
Bioscientist : Jurnal Ilmiah Biologi Vol 12, No 1 (2024): June
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.v12i1.9192

Abstract

Jamblang River is a concern because it has a very turbid water color due to natural stone mining activities processed by the natural stone industry. One of the natural stones produced at the location of the Jamblang river is andesite rock which has a constituent component is silica. Silica is the second most abundant element in the Earth's crust after oxygen. Silica usually comes from minerals and rocks that dissolve in water. In fresh water, quartz silica is less soluble than amorphous silica. Enrichment of nutrients with silica favors the growth of diatoms, since diatoms need silica for cell wall biogenesis. The amount of silica present in water is not immediately absorbed by diatoms. The sampling method used is the purposive sampling method. The sampling locations set are 4 locations. The most interesting location is location 2 because there are 38 natural stone industries scattered around the location. There is also a simple linear regression statistical test on SPSS which shows the influence of silica levels on the abundance of benthic diatoms in the Jamblang river. The value of Sig. 0.000 shows that there is an influence of silica on plankton abundance in water because the value is < 0.05. The lowest silica content obtained at location 2 is also supported by the least abundance of diatoms found. The low abundance of diatoms is thought to be caused by high TSS numbers, low observed brightness, and low DO numbers.

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