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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 1,428 Documents
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Analisis Perbandingan Sistem Budidaya terhadap Karakteristik Sel dan Performa Pertumbuhan Rumput Laut (Gracilaria verrucosa) Prayundika, Hanifah Zahra; Rahim, Andi Rahmad
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): 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.v12i2.13002

Abstract

Gracilaria verrucosa has an important role in the agar industry sector and is a major contributor to food security, so cultivation techniques are needed to increase seaweed productivity. This study aims to compare the Gracilaria verrucosa seaweed cultivation system on cell characteristics and seaweed growth performance. This study is a quantitative study with an experimental method. The technique for determining seaweed cell characteristics uses plant histology methods including fixation, filtration, and staining of specimens to see the cell structure under an optical microscope, while to measure seaweed growth performance using absolute length, specific growth rate (SGR), and number of thallus. Data analysis uses t-test inferential statistics. The results showed that (1) the extensive system produced better growth performance, with absolute length (9.7 ± 1.4 cm), SGR (28.6%), and higher number of thallus (256.6 ± 16.8); (2) cell characteristics in the extensive system produced larger and more regular sizes, with a higher number of cells at the end of maintenance; (3) there was no significant difference in agar yield between the two systems.
Keanekaragaman Pteridophyta di Tahura Nuraksa Kabupaten Lombok Barat Ningsih, Widia Ayu; Hadiprayitno, Gito; Handayani, Baiq Sri
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): 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.v12i2.13014

Abstract

Pteridophyta is a pioneer plant that has an important role because it can provide benefits for human life and the environment. Pteridophyta can maintain the balance of the forest ecosystem, namely regulating water levels, helping the weathering process of forest litter, and as a soil cover in the forest, thereby preventing erosion. The distribution of Pteridophyta plant populations is influenced by several factors including humidity, light, and sufficient water sources. This study uses a descriptive exploratory method which aims to determine the types of Pteridophyta and obtain the diversity index value of Pteridophyta species in Tahura (Taman Hutan Raya) Nuraksa, West Lombok Regency. Pteridophyta sampling used the quadratic method by making plot arranged in a zigzag with a size 5m x 5m. The results showed that the number of Pteridophyta found was 18 species, 12 genera, and 8 families (Athyriaceae, Denstaedtiaceae, Dryopteridaceae, Lomariopsis, Polypodiaceae, Pteridaceae, Tectariaceae, and Thelyptheridaceae. Analysis of Pteridophyta species diversity index using the Shannon-Wiener formula and obtained a species diversity index value (H') for all species of 2.209, with a medium species diversity category. The value of this diversity index shows the amount of variation in species and growth of Pteridophyta in accordance with environmental conditions in Tahura Nuraksa.
Aktivitas Afrodisiak in Vivo Ekstrak Etanol 70% Akar Lelak (Uvaria rufa Blume.) Pada Mencit (Mus musculus) Jantan Taek, Maximus M.; Muslikh, Faisal Akhmal; Maulina, Novia; Sawjana, Oashiva H.; Azzahra, Azizah; Aszari, Efendi H.; Prameswari, Fadila A.; Ma’arif, Burhan
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): 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.v12i2.13025

Abstract

Sexual arousal is an important aspect to achieve a harmonious sex life, but often disorders in normal sexual function disrupt the harmony of household relationships. One alternative natural ingredient that has the potential as an aphrodisiac agent is Lelak (Uvaria rufa) which is traditionally used by the people of East Nusa Tenggara (NTT), Indonesia, to overcome sexual dysfunction in men. This study aims to evaluate the safety and effectiveness of 70% ethanol extract of Uvaria rufa roots in vivo. This study is an experimental study to test the effectiveness of 70% ethanol extract of Uvaria rufa roots in vivo. This study was conducted with an initial stage, namely 70% ethanol extract of Uvaria rufa roots obtained through maceration, then the aphrodisiac activity was measured through the parameters of the number of leydig cells and the weight of the testes of male mice (Mus musculus).The results showed that the administration of the extract with an LD50 value of 2108 μg/ml which is included in the Relatively Harmless category, while group P2 with a dose of 0.85 mg/20g BB/day was stated as the optimal dose (p<0.05 against the negative control) for aphrodisiac activity in measuring testicular weight and the number of Leydig cells. Therefore, administration of 70% ethanol extract of Uvaria rufa roots at a dose of 0.85 mg/20g BW/day is the optimal dose for aphrodisiac activity.
Profil Keterampilan Berpikir Kritis Siswa SMA Negeri 4 Tasikmalaya Pada Pembelajaran Biologi Ramdani, Dani; Latifah, Hilma Nuri; Triyanto, Samuel Agus
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): 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.v12i2.13041

Abstract

Critical thinking skills are one of the essential competencies that need to be developed in the learning process, especially in biology subjects that require in-depth analysis of natural phenomena. This study aims to analyze the profile of students' critical thinking skills at SMA Negeri 4 Tasikmalaya in biology learning. The research method used is quantitative descriptive. The sample used was 181 grade X students. The critical thinking ability data in this study was measured through 12 written essay test questions. The data analysis technique used in this study was the reliability and validity of the instrument to ensure that the critical thinking skills measurement instrument used was reliable and valid. This research is very important to do as one way to analyze the profile of critical thinking skills in biology learning. The results of the study of students' critical thinking skills on the Interpretation indicator showed a percentage of 36.61% with a low category, the Analysis indicator showed a percentage of 68.08% with a high category, the Evaluation indicator showed a percentage of 58.82% with a medium category, the Inference indicator showed a percentage of 45.92% with a medium category, the Explanation indicator showed a percentage of 39.76% with a low category, and the Self-regulation indicator showed a percentage of 73.02% with a high category. Based on these data, it can be seen that the average critical thinking skills of students is 53% which can be classified as moderate critical thinking skills. The results of the study can provide a significant contribution in improving the quality of biology education at SMA Negeri 4 Tasikmalaya, by encouraging the development of students' critical thinking skills that will be useful for them in academic environments and everyday life.
Phenotype Variation, Correlation and Regression Analysis of Quantitative Traits in Adult Pasundan Bulls at Various Ages Wibowo, Heru Budi; Mudawamah, Mudawamah; Sumartono, Sumartono
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): 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.v12i2.13044

Abstract

Pasundan cattle are local cattle as strategic germplasm to be developed.  This study aimed to determine the diversity of Pasundan cattle in quantitative traits of chest circumference and body weight at various ages as a basis for information in future breeding development.  The research method was a case study with purposive sampling whose criteria were bulls aged 25 months and above. The material used was 19 Pasundan bulls kept at the UPTD BPPIBT Pasundan Cattle Ciamis, West Java Province. Variable Observed quantitative traits included chest circumference or CC and body weight or BW at various ages. Data analysis using descriptive statistics, chi-square test, correlation and regression analysis.  The research results show that (1) the variation in the age of the sample cattle used with an average value of 30.11 ± 3.63 months, with a VP value of 13.21 months and a median of 29 months, mode 33 months; (2) the Chi-square test, the results of CC and BW research compared to the Pasundan cattle standard were not significantly different (P>0.05) and very significantly different (P<0.01); (3) phenotype variation (VP) in chest circumference (CC) and body weight (BW) was higher compared to the Pasundan bull standard with the following values: 70.14 vs 138.30 cm and 810.64 vs 1,156 kg; (4) the correlation and regression coefficients on the relationship between age, chest circumference, and body weight were quite strong (r>0.5) with a significantly different regression test (P<0.05).
Struktur Komunitas dan Status Konservasi Ikan Berdasarkan Alat Tangkap Tradisional di Desa Simonis Kabupaten Labuhan Batu Utara Ritonga, Irna Alfaini; Khairul, Khairul; Harahap, Hasmi Syahputra
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): 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.v12i2.13057

Abstract

Fish diversity must be maintained because it has an ecological role, namely maintaining the balance of the ecosystem and can be used as an indicator of pollution. diversity is also important for the balance of aquatic ecosystems and some simonis villagers make it a community livelihood.  Based on information from residents of Simonis Village, North Labuhan Batu Regency, it is recognized that the diversity found in the river is quite high. In addition, residents of simonis village, north labuhan batu district can also utilize river water in pulo biski as drinking water, washing clothes, bathing and tourism.  This study aims to determine the community structure, ecological index and conservation status of fish obtained in Simonis Village based on IUCN data. This research is a survey with the determination of observation stations through purposive sampling method. Fish sampling was carried out using environmentally friendly fishing gear such as nets, shoots, fishing rods and tanggok or nets. The results of this study obtained approximately 22 species of fish and each fish species and morphological identification was carried out in order to know the scientific name of each type of fish. Index value and Diversity with moderate category. Diversity Index value with high category. Dominance Index value with no dominance criteria. It is concluded that the diversity of fish in Simonis Village, North Port Batu Regency.
Analysis of The Performance of Microbubble Generators as Aerators in Tilapia Cultivation with High Density Fishery Systems Pambudiarto, Benny Arif; Pahlawan, Ilham Arifin; Fatmawati, Yuni; Mirbath, Muhammad Shobichul
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): 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.v12i2.13064

Abstract

Fish farmers in Gresik Regency face significant challenges in developing aquaculture, including land conversion and extended dry seasons that lead to pond drought. Microbubble generators (MBGs) present a potential solution to these issues. This study evaluates the effectiveness of different MBG types in tilapia farming. Weekly measurements of fish mass and length were conducted to determine growth rates using direct methods. Water quality was assessed by testing COD and ammonia levels at the Gresik Regency DLH Laboratory and measuring dissolved oxygen levels directly with a DO meter. The distribution and size of the bubbles were analyzed using the shadow image technique, supported by MATLAB software. The study employed a stocking density of 100 fish/m² with three treatments: MBG swirl type, venturi type, and a conventional aerator. The findings revealed that the MBG swirl type resulted in the best fish growth and maintained water quality within the required standards. The specific growth rate in swirl-type ponds was 3.970 ± 0.014, with a survival rate of 100%. Additionally, the swirl-type MBG effectively maintained dissolved oxygen levels above 3 ppm, meeting the minimum requirement for fish survival, despite having less optimal microbubble distribution compared to the venturi type. While the MBG venturi type performed well initially, technical issues affected its bubble consistency over time. Enhancements in the venturi MBG's design are recommended to improve its performance and reliability.
Aktivitas Antidiabetes Ekstrak Etanol Daun Bidara Pada Tikus Dengan Induksi Streptozotocin Wahyuni, Kumala Sari Poespita Dewi; Mawardika, Herlinda; Sabban, Indra Fauzi
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): 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.v12i2.13070

Abstract

Type 2 Diabetes Mellitus is a global health problem that continues to increase, requiring safer and more effective alternative therapies. Bidara leaves have been known to have bioactive compounds that are useful as antioxidants, antimicrobials, and antidiabetics. This study aims to determine the potential of bidara leaf extract in lowering blood sugar in diabetic rats. This study is an experimental research with four treatments. This study includes the manufacture of bidara leaf extract through the maceration method, phytochemical screening, and testing of antidiabetic activity in STZ-induced animal models. Blood sugar levels were measured before and after the intervention. The results showed that (1) bidara leaf extract contains flavonoids, tannins, saponins, steroids, and quinones; (2) Giving extracts with various concentrations for 42 days can reduce blood glucose levels in rats; (3) Bidara leaf extract at a dose of 400 mg/ml showed higher activity than other doses. Thus, it can be concluded that 70% ethanol extract of bidara leaves can be used to treat type 2 diabetes mellitus.
Evaluating the Efficacy of Topical Moringa Oleifera and Aloe Vera Extracts in Accelerating Second-Degree Burn Wound Healing Fauziah, Dwi Nur; Ramadani, Nur Laili; Moniz, Argita Agnesia; Syafitri, Wahyu Fauziah Iga; Humairah, Sandrina; Pradipta, Rifky Octavia
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): 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.v12i2.13071

Abstract

Burn injuries are a global health issue, particularly second-degree burns, which damage both the epidermis and dermis. This has led to the exploration of natural treatments like Moringa oleifera (moringa) and Aloe vera for their potential in wound healing, pain relief, and infection prevention. This study aimed to evaluate the efficacy of a topical formulation containing extracts of Moringa oleifera and Aloe vera in accelerating the healing of second-degree burn wounds. This study employed a true experimental design with Sprague Dawley rats, divided into four groups (control positive, control negative, and two treatment groups). The experiment utilized topical formulations combining different concentrations of Moringa oleifera and Aloe vera extracts. The wound healing process was assessed through macroscopic observation and histopathological analysis, measuring the diameter of the burn wounds at different time intervals. Results showed that formulations containing Moringa oleifera and Aloe vera extracts significantly improved wound healing compared to the control group. The formulation with a 50:50 ratio of Moringa oleifera and Aloe verademonstrated the highest efficacy, reducing wound size and promoting fibroblast proliferation and vascularization. This study confirms the potential of a topical combination of Moringa oleifera and Aloe vera extracts in accelerating the healing of second-degree burns.
Efektivitas Ekstrak Padina minor dalam Meningkatkan Kadar Klorofil Pada Tanaman Sorgum Yourga, Anze; Chaniago, Irawati; Kasim, Musliar
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): 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.v12i2.13099

Abstract

Sorghum is a potential alternative food source due to its high carbohydrate, fiber, and protein content, which surpasses that of rice, as well as its greater adaptability to marginal land and dry weather conditions. However, sorghum productivity is often hindered by suboptimal fertilizer use, necessitating additional solutions like biostimulants. Seaweed-based biostimulants, such as Padina minor, hold promise in enhancing plant growth by stimulating nutrient absorption, improving resistance to abiotic stress, and enriching soil quality. This study aimed to evaluate the effectiveness of P. minor extract in increasing chlorophyll levels in sorghum plants. The experiment was conducted using a Completely Randomized Design (CRD) with varying concentrations of P. minor extract (20%, 30%, and 40%) and application frequencies (1, 2, and 3 times). The research results showed that (1) a concentration of 20% with administration of the extract once gave a significant increase in chlorophyll levels compared to other concentrations and frequencies; (2) administration of biostimulants in low concentrations and with fewer administration frequencies has proven to be more effective; (3) higher concentrations and frequencies of biostimulants can cause toxicity to plants; (4) the use of P. minor extract as a biostimulant can be a sustainable alternative in agricultural practices to improve the quality and productivity of sorghum.

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