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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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Comparison of Antioxidant Activity and Chemical Profile between Green Tea Kombucha with Green Tea and Rosela Combination Kombucha Gerda Pintoko Tunjungsari; Retno Aliyatul Fikroh
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.v12i1.9977

Abstract

This study investigates the antioxidant potential and chemical profile of kombucha made from green tea leaves and roselle flowers, analyzing pH, alcohol content, and the impact of fermentation time. Kombucha was prepared with green tea and a 1:1 mixture of green tea and roselle, with samples analyzed on days 1, 4, 8, 12, 16, and 24. Antioxidant activity, pH, and alcohol content were measured, and statistical analyses including one-way ANOVA, Tukey HSD, and Spearman correlation tests were conducted. Results indicated that the combination kombucha exhibited higher antioxidant activity (96.39% DPPH inhibition) compared to green tea kombucha (79.62%). There was no significant difference in pH and alcohol content between the two types (p > 0.05). A strong negative correlation was found between pH and fermentation time (-0.589, p < 0.001) and pH and alcohol content (-0.571, p < 0.001), while a strong positive correlation was observed between % inhibition and fermentation time (0.637, p < 0.001). The findings suggest that combining green tea and roselle enhances antioxidant activity in kombucha, and fermentation time significantly affects antioxidant activity, pH, and alcohol content.
Eksplorasi Mikroflora Alami Produk Fermentasi Tradisional Cangkuak Berbasis Daging di Kecamatan Kuantan Mudik Kabupaten Kuantan Singingi Adela Putri; Nurmiati Nurmiati; Periadnadi Periadnadi
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.v12i1.11216

Abstract

Cangkuak is a fermented food made from meat with betung bamboo shoots or kluwak, salt and rice. The fermentation process is carried out without adding microbial cultures (spontaneous) for one to three weeks in a tightly closed container. cangkuak's manufacturing technique, ingredient formulation and constituent ingredients are unique, resulting in a final product with different characteristics. Research on the presence of microbes in fermented food products (fish, milk, vegetables) has been widely conducted, but information on exploring the presence of natural microflora and the in vitro potential of fermenting bacteria in cangkuak has never been reported. This research was conducted using a survey method and the resulting data were presented descriptively. It was found that the natural microflora found in the three samples of cangkuak in Kuantan Mudik was dominated by bacteria, with the highest proportion of bacterial groups in the three cangkuak samples being fermentative bacteria (2.0 - 6.30x105 cfu/g), cellulolytic bacteria (3.30 - 5.90x105 cfu/g), amylolytic bacteria (1.70 - 4.40x105 cfu/g), proteolytic bacteria (0.12 - 7.90x105 cfu/g), lipolytic bacteria (0.08 - 0.12x105 cfu/g). Six potential fermentative isolates were obtained as evidenced by the calculation of index values, namely DK-I1 (1.59), DR-I1 (1.36), DR-I2 (2.49), DR-I3 (1.19), DKR-I1 (2.41), and DKR-I2 (2.96).
The Relationship Knowledge and Attitudes of Patients in Preventing Hypertension Recurrence Subari, Subari; Sulaiman, Sulaiman; Karjono, Karjono
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.v12i2.12340

Abstract

Hypertension is a major global health issue that significantly contributes to morbidity and mortality. This study examines the relationship between knowledge and attitudes towards preventing hypertension recurrence among hypertensive patients in Indonesia. Utilizing a cross-sectional design, data were collected from 49 hypertensive patients through questionnaires assessing knowledge and attitudes. The results reveal a significant correlation between good knowledge and positive attitudes, with 65% of those with good knowledge exhibiting a positive attitude compared to 35% among those with poor knowledge. The odds ratio (OR=1.643, p=0.000) indicates that patients with better knowledge are significantly more likely to have a positive attitude towards hypertension prevention. These findings underscore the importance of educational interventions in improving health outcomes. Tailored educational programs that address psychological and nutritional aspects, as well as social support mechanisms, are recommended to enhance patient knowledge and foster positive health behaviors. This study highlights the need for continuous patient education and support to reduce the recurrence of hypertension. Public health strategies should focus on integrating comprehensive educational approaches to empower patients and improve adherence to hypertension management practices. The significant role of education in shaping health attitudes and behaviors emphasizes its critical place in public health initiatives aimed at combating hypertension.
Inovasi Grafting Mangga Dodol (Mangifera indica L.) Berdasarkan Tipe Mata Tunas dan Panjang Entres Fiktor Imanuel Boleu; Oktosea Buka; Davidson Corneles Nusa; Vanhurd Samloy
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.v12i1.10104

Abstract

The research was conducted to determine the effect of selecting the type of entres length and bud eyes in grafting dodol mango (Mangifera indica L) on the process of bud initiation, bud height, and leaf width. The experimental design used was Randomized Complete Block Design with factorial pattern. The first treatment is the type of entres length, namely 7 cm (P1), 10 cm (P2) and 13 cm (P3) while the second treatment is the type of bud eye of the entres, namely without bud eye (M1), 1 bud eye (M2) and 2 bud eyes (M3). Based on the type of bud eye, treatments P2 and P3 showed a better effect than P1 on the bud initiation process and leaf width parameters. While in the measurement of bud height, P3 treatment showed a better effect than P2 and P1. Meanwhile, in terms of the type of buds, treatments M2 and M3 had a better effect than M1 on the process of bud initiation, bud height and leaf width. The results of the analysis of variance showed that there was an interaction between the type of length and the type of bud eye on all three parameters.
Pengaruh Penambahan Nutrient (NPK dan Pupuk Urea) terhadap Bioethanol Hasil Fermentasi Biji Alpukat (Persea americana Mill.) Zakyya Septiana Putri; Aceng Ruyani; Mellyta Uliyandari; Rendy Wikrama Wardana; A. A. Sukarso
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.v12i1.11283

Abstract

Bioethanol is an energy source obtained through fermentation. In bioethanol production, Persea americana seeds are used as a fermentation medium because they contain lots of carbohydrates. This research aims to determine the effect of additional nutrients (NPK and urea fertilizer) required by Saccharomyces cerevisiae by varying the nutritional variables in the form of NPK and urea fertilizer. The process of making bioethanol goes through stages: making Persea americana seed flour, hydrolysis process using 6% HCl, then fermentation process, and distillation process. This research was carried out with the addition of Nutrients in the form of NPK and Urea Fertilizer with 5 treatments, namely: A) 100% yeast (no addition of Nutrients); B) 100% NPK (4 g); C) 100% Urea Fertilizer (4 g); D) 50% NPK and 50% Urea Fertilizer (4 g NPK and 4 g Urea Fertilizer); and E) 75% NPK and 25% Urea Fertilizer (3 g NPK and 1 g Urea Fertilizer), and varying the length of fermentation time to 13, 19, and 25 days. Success parameters are assessed through the bioethanol yield produced by each treatment. The research results showed that the highest bioethanol (29.7 ± 0.47%) was composition E (NPK 75% and Urea Fertilizer 25%) with a fermentation time of 25 days.
Analisis Kelayakan E-Magazine pada Submateri Peranan Bakteri Kelas X SMA Rara Sania; Laili Fitri Yeni; Anisyah Yuniarti
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.v12i1.11192

Abstract

This study aims to analyze the feasibility of an e-magazine on the inhibitory activity of Pontianak's siam orange peel extract against Bacillus cereus in the subtopic of bacterial roles. This research employs a quantitative descriptive method with several stages including e-magazine development, e-magazine validation, and data analysis. Validation activities consist of instrument validation by 2 validators and media validation by 5 validators. Validation was conducted using a closed-ended questionnaire validation sheet. E-magazine media validation assesses three aspects: format, content, and language. The validation results were analyzed using Aiken’s V formula and reliability testing using the Intraclass Correlation Coefficient (ICC). The study shows that the developed e-magazine meets Aiken’s V standard with a score of 0.92 and a reliability coefficient of 0.893, categorized as good, thus suitable for use as a learning medium. This e-magazine is complemented with appealing visualizations to provide a unique learning experience for students studying the bacterial roles subtopic.
Hubungan Antara Motivasi, Sikap, dan Kecerdasan Adversitas dengan Hasil Belajar Biologi Peserta Didik Kelas XI SMA Hasniar Hasniar; Yusminah Hala; Syamsiah Syamsiah
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.v12i1.11288

Abstract

This study aims to analyze the relationship between learning motivation, learning attitude, and adversity quotient with biology learning outcomes of eleventh grade students at SMA Negeri 1 Makassar. The research method used is ex-post facto with a correlational nature. The population of this study consists of all students of SMA Negeri 1 Makassar totaling 1212 students. The sample of the study is the eleventh grade science class determined using the Slovin formula, with a sample size of 132 students. Data collection involved instruments measuring learning motivation, learning attitude, and adversity quotient comprising 90 items of statements and documentation. The research findings revealed a correlation coefficient of 0.809, indicating a strong relationship between the variables.
Analisis GC-MS dari Senyawa Bioaktif Ekstrak Etanol Daun Tanaman Sirsak (Annona muricata L.) sebagai Obat Tradisional I Putu Bayu Agus Saputra; Ni Made Wiasty Sukanty
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.v12i1.10330

Abstract

Soursop leaves (Annona muricata L.), have long been recognized in various parts of the world, especially in tropical regions, as a plant with various health benefits and traditional uses. The rich history of its use has been intertwined in various cultures, where the leaves are used not only as a food ingredient, but also as a herbal medicine. The phytochemical content in soursop leaves, such as acetogenin, alkaloids, and flavonoids has been the subject of intensive research in the last decade, highlighting their potential in treating a variety of health conditions, from inflammation to anti-cancer potential. The chemical structure and biological activity of these compounds have attracted the attention of researchers, especially in the search for alternative therapies for difficult-to-treat diseases. Soursop leaf extract has antioxidant, antimicrobial, antiparasitic, and antitumor properties that offer new insights into its therapeutic potential. This research method uses the maceration method, where soursop leaves will be extracted using ethanol solvent and then the compounds contained in the extract will be analyzed using Gas-Mass Spectrometry (GC-MS). The results of GC-MS analysis show that soursop leaves contain the compounds 2,3-Dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one, Trans-Caryophyllene, Hexadecanoic acid (CAS) Palmitic acid, 2-Hexadecen- 1-ol, 3,7,11,15-tetramethyl (Phytol), 9,12-Octadecadienoic acid (Z,Z) - (CAS) Linoleic acid, 9,12,15-Octadecadienoic acid methyl ester, Octadecanoic acid (CAS ) Stearic acid. The results of the analysis of compounds in soursop leaves can be a reference for further research to develop the potential of soursop fruit which leads to traditional medicine.
mRNA Relative Expression Catalase in Hypertension Yohana, Yohana; Faradilla, Meutia Atika; Meiyanti, Meiyanti; Hartanti, Monica Dwi; Margo, Eveline; Anastasya, Karina Shasri
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.v12i2.12825

Abstract

Hypertension is number one worldwide disease which lead to death. Initially hypertension is caused by changes in the walls of blood vessels. These vascular changes are due to the accumulation of ROS (Reactive Oxygen Species). ROS is the result of the balance between antioxidants and oxidants, but uncontrolled conditions will cause vascular damage. One of ROS product from metabolism which could played role in downregulation antioxidant gene expression is hydrogen peroxide. Hydrogen peroxide could be neutralized by catalase enzyme. Studies about catalase expression in hypertension subject is still limited. This research aims to determine mRNA relative expression catalase in hypertension. In this case control study, thrity subject hypertension and normotension subject were recruited within the age of 50-60 years. Hypertension subject was chosen according to JNC 8. Two millilitres vein blood was isolated into RNA. mRNA expression was detected by qRT PCR with 2 steps. Relative expression was determined using livak method. The data was analyzed using Mann Withney test with GraphPad software. Research results show that (1) catalase mRNA relative expression was 0,6 fold in hypertension; (2) catalase relative expression was not significantly lower in hypertension; (3) other antioxidants might have other mechanism to detoxify ROS and prevent hypertension.
Jenis-jenis Makrozoobentos yang Ditemukan di Batang Kuantan Kawasan Wisata Geopark Silokek Kabupaten Sijunjung Annisa Ramadhani; Rina Widiana; Abizar Abizar
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.v12i1.11075

Abstract

The Kuantan River in the Silokek Geopark Tourism Area, Sijunjung Regency, shows that the condition of the Kuantan River in the Silokek Geopark Tourism Area is a natural and potential tourism area, because the Kuantan River in the Silokek Geopark Tourism Area has become a tourist attraction due to its abundant natural wealth. However, gold mining has caused the Kuantan River water to be categorized as polluted, indicated by its turbidity. This study aims to determine the types of macrozoobenthos found in the Kuantan River within the Silokek Geopark Tourism Area, Sijunjung Regency. This research was conducted from August to December 2023. The research used a descriptive survey method, which included direct observation and sampling at the research site. The sampling technique used was purposive sampling, selecting three research stations. Sample identification was conducted at the Biology Education Laboratory, Universitas PGRI Sumatera Barat. Physicochemical water measurements were carried out at the Laboratory of Standardization and Industrial Services in Gadut, Padang, West Sumatra. The results of the research on the types of macrozoobenthos found in the Kuantan River within the Silokek Geopark Tourism Area, Sijunjung Regency, identified 10 species belonging to 2 classes: Gastropoda and Pelecypoda. Eight species of Gastropoda were found: Tarebia granifera, Thiara scabra, Brotia costula, Tryonia clathrata, Pleurocera acuta, Thiara scabra, Goniobasis livescens, Brotia sp., and 2 species of Pelecypoda: Corbicula manilensis and Pilsbryoconcha exilis.

Page 56 of 143 | Total Record : 1428

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