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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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Pemanfaatan Adsorben Serbuk Marmer dan Batuan Manure Ayam Petelur terhadap Persentase Gas Bio Mohamad Imam Zarkasi; Mochammad Junus
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): 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.v10i2.6317

Abstract

This study aims to determine the effect of the adsorbents of marble powder and manure rock of laying hens on the percentage of bio-gas content, and to determine the optimization of the adsorbent treatment of manure rock of laying hens and marble powder in producing the percentage of bio-gas content and reducing the amount of bio-gas content other than CH4. The research material used was chicken manure rock and marble powder. The research method used was an experiment with RAL (completely randomized design), which consisted of 4 treatments and 4 replications. The treatment is without using adsorbents; 100% laying hen manure rock; 100% marble powder; and 50% marble powder + 50% manure rock laying hens. The variables observed in this study include the volume and time required for methane gas to flow through the adsorbent, the time required for methane gas to pass through the adsorbent to the gas-holding balloon as a sample, and the gas content in methane gas before purification, the percentage levels of CO2, CH4, O2, and N2. The results showed that the use of marble powder and manure rock adsorbents for laying hens on the percentage of biogas content gave no significant difference (P > 0.05) to the percentages of CH4, O2, and N2 gases, but gave a significant difference (P <0.05 ) to the percentage of CO2 gas of 11.33% was found in the P2 treatment which used 100% marble powder adsorbent. P2 treatment was able to reduce CO2 levels by 59.70%. It can be concluded that the greater the CH4, the better the calorific value and is inversely proportional to CO2.
Identifikasi Tumbuhan Obat dan Pemanfaatannya oleh Battra di Desa Doulu Kabupaten Karo Roy Franata Tarigan; Fathul Yusro; Yanieta Arbiastutie; Yeni Mariani
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): 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.v10i2.5379

Abstract

Battra is a person who can blend various plants into medicines used in traditional medicine processes. This study aims to identify and analyze the medicinal plants used by Battra in Doulu Village, Karo Regency, North Sumatra Province. This study uses a survey method with a tool in the form of an interview guide. Interviews with battra were conducted in-depth to find out information about the medicinal plants they use, what parts of the plants are used, and their processing techniques and uses. The study results show that Battra in Doulu Village, Karo Regency, is still practicing traditional medicine. Battra in this village utilizes 31 types of medicinal plants. The highest plant family used was Zingiberaceae. The most utilization by battra was in herbaceous habitus, which was 39%, plant parts in the form of leaves (35%), the processing carried out by chopping (39%), and the use of medicinal plants by eating (48%).
Struktur Komunitas Zooplankton dan Fitoplankton di Isi Lambung Ikan Tongkol Komo (Euthynnus affinis) Cindy Ayu Nofitasari; Pungky Slamet Wisnu Kusuma; Dyah Hariani
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): 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.v10i2.6191

Abstract

Zooplankton and phytoplankton have an ecological function as primary producers in the food chain, so they are often used as a scale for measuring water fertility. The aim of the study was to determine the community structure of zooplankton and phytoplankton in terms of the level of diversity, level of uniformity, and level of dominance in the gastric contents of the Komo Tuna (Euthynnus affinis) caught by fishermen in Lamongan Waters. Sampling of the Komo Tuna fish was carried out from the catches of fishermen in Lamongan Waters. The experimental method was through direct observation of the types of zooplankton and phytoplankton in the gastric contents of the Komo Tuna fish. Analysis of zooplankton and phytoplankton community structure data in the stomach contents of the Tuna Tuna using the diversity index, uniformity index, and dominance index approaches. The results showed that the community structure of zooplankton and phytoplankton that had been identified in the gastric contents of the Tuna Tuna was in accordance with life in Lamongan waters indicated by the diversity index value belonging to the medium and low categories, the uniformity index value belonging to the high category, and the dominance index value belonging to the unstable and stable category.
Deteksi Cemaran Bakteri Salmonella spp. pada Ikan Bandeng Segar (Chanos chanos) di Tempat Pelelangan Ikan Gadukan Lumpur Kabupaten Gresik Liantika Versa Dharma Putra
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): 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.v10i2.6212

Abstract

Salmonella spp. is a bacterium that causes Salmonellosis and is a bacterium that can cause food-borne illness to humans. The presence of Salmonella spp. in fresh milkfish can affect quality aspects, quality deterioration in fishery products, and food safety. Microbiological testing is an important indicator in checking for contamination in food. The main factor causing contamination can be the presence of pathogenic bacterial contamination in food ingredients. The purpose of this study was to detect Salmonella spp. on fresh milkfish (Chanos chanos) sold at Fish Auction Places (FAP), Gresik Regency using the Total Plate Count (TPC) test indicator and Salmonella Shigella Agar (SSA) media culture. This study used a qualitative descriptive study which began with observing the location and taking samples of milkfish in the field, then proceeding with the isolation of Salmonella spp. from in-vitro samples of milkfish and analyzed qualitatively. The results showed that fresh milkfish samples were contaminated with microbes with the highest number of 6×105 CFU/g and were detected to contain Salmonella spp. on SSA media, so that milkfish sold at the Gadukan Lumpur Fish Auction Place in Gresik Regency cannot meet the Indonesian National Standard for fresh fish (2729-2021).
Penerapan Media Pembelajaran Tiga Dimensi untuk Meningkatkan Hasil Belajar Kognitif Peserta Didik pada Materi Sistem Tata Surya Erwin Umbu Dangu Ela; Yohana Makaborang
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): 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.v10i2.6415

Abstract

This study aims to: 1) describe the application of three-dimensional learning media to students' cognitive learning outcomes; and 2) describing the increase in cognitive learning outcomes of Class VII students of SMP Negeri 4 Umbu Ratu Nggay, Pahomba Village, Umbu Ratu Nggay District, Central Sumba Regency, East Nusa Tenggara Province after using three-dimensional learning media on solar system material. This type of research is Classroom Action Research (CAR), which is conducted in two cycles. Each cycle consists of planning, implementation, action, evaluation, and reflection stages. The subjects of this study were class VII students of SMP Negeri 4 Umbu Ratu Nggay for the 2021/2022 academic year, which consisted of 12 students. The data obtained in this study are in the form of students' cognitive learning outcomes taken from the application of the three-dimensional media learning method. The instruments used are interview sheets, tests, and documentation. The results of the research and data analysis in cycle I and cycle II revealed that there was an increase in the cognitive learning outcomes of class VII students of SMP Negeri 4 Umbu Ratu Nggay. This is indicated by an increase in the percentage of students' cognitive learning outcomes in science lessons on the solar system material. The percentage of the pre-test score in the first cycle category was 25% complete and 75% incomplete, and the post-test value in cycle I increased, namely the complete category was 41% and 59% incomplete. In cycle II there was an increase where the percentage of the pre-test score with the complete category was 66.6% and 33.4% incomplete, and the post-test value in the second cycle category was 91.3 complete and 8.3% incomplete.
Eksplorasi Potensi Bakteri Entomopatogen di Areal Tanaman Perkebunan Provinsi Kalimantan Utara Abdul Rahim; Roslina Roslina; Nurmaisah Nurmaisah; Muh. Adiwena
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): 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.v10i2.6021

Abstract

Plantation areas have the potential as a source of biological agents for entomopathogenic bacteria. This study aims to determine the potential of entomopathogenic bacteria from various locations in plantation crop cultivation areas, and compare their potential in North Kalimantan Province. This study carried out soil sampling, bacterial isolation, and selection of entomopathogenic bacteria using insect baits. This type of research uses a survey method on the potential of entomopathogenic bacteria. The survey was conducted at three plantation crop cultivation locations, namely coffee cultivation areas in Malinau, cocoa in Sebatik, and oil palm in Sebuku. The potency is distinguished based on the number and macroscopic characteristics of the bacterial isolate colonies obtained from each location. Furthermore, selection was carried out through testing, namely comparing bacterial isolates with a dilution of 10-1, stock, and control. Analysis of survey results using descriptive analysis and potential testing using t-test. The results showed that there were 13 bacterial isolates, and the coffee cultivation area in Malinau had the highest bacterial isolates. The selection results found 7 (seven) bacterial isolates that had the potential to be entomopathogenic bacteria, and coffee cultivation locations in Malinau had a higher number of isolates that had the potential to be entomopathogenic compared to other locations. However, isolate ST6-4U2 at dilution 10-1 from soil in the oil palm plantation area in Sebuku has the highest virulence potential as an entomopathogenic bacteria.
Pengaruh Pupuk Organik Cair (POC) dari Sampah Rumah Tangga terhadap Pertumbuhan Tanaman Anggrek (Dendrobium sp.) Secara In Vitro Ali Imran; Ida Royani; Iwan Doddy Dharmawibawa
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): 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.v10i2.6518

Abstract

This study aims to obtain the right formula for using Liquid Organic Fertilizer (LOF) from household waste for the growth of Dendrobium sp. The method used was an experiment with a Completely Randomized Design (CRD), with three replications. The medium used is MS media by adding liquid organic fertilizer from household waste with a concentration of (0-3) mg/L. Parameters in this study were the fastest day of emergence of shoots, number of shoots, and roots. The data obtained was analyzed using the Kruskal-Wallis test, because the data obtained was not normal and not homogeneous, a descriptive analysis was used. The results showed that the highest number of shoots was obtained at a concentration of 3 mg/L of organic waste growth regulator with a total of 4.3 shoots and 15.7 roots at a concentration of 2 mg/L the fastest day for shoots to appear after planting was 12 days on plant media and roots appeared on 8th day after planting on Dendrobium sp.
Analisa Total Bakteri Salmonella spp. pada Produk Ikan Cakalang Asap yang Dijual pada Beberapa Pasar di Kota Ambon Fiyogi Derandy Alfarego Tuhumury; Martha Kaihena; Cecelia Anna Seumahu
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): 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.v10i2.5901

Abstract

Skipjack tuna (Katsuwonus pelamis) is one of the dominant capture fisheries products in Maluku. This is supported by the geographical location of the Maluku Islands which are surrounded by the sea. Bacteria are often found in traditional processed fishery products such as smoking fish. This study aims to determine the total bacteria Salmonella spp. and differences in the abundance of Salmonella spp. on smoked skipjack (Katsuwonus pelamis) products sold in several markets in Ambon City. This research is an experimental research. The research was carried out by taking samples with a total of 5 samples from the people's market location, and bacterial calculations were carried out using a dilution technique. Bacteria that have been obtained from the dilution results, then isolated using the quadrant scratch method technique on SSA media (Salmonella Shigela Agar). Bacterial biochemical tests, including: indole test, Methyl-Red test, Voges Proskauer test, citrate test, and Triple Sugar Iron Agar (TSIA) test, and gram staining were performed to confirm/identify the isolated bacteria. The results showed that smoked skipjack sold at Mardika Market was identified as having the total number of Salmonella spp. respectively 6700 CFU/ml and 8400 CFU/ml. The total number of Salmonella spp. on smoked skipjack at Mardika market is different from the results of the calculation of the total bacteria of smoked skipjack sold in modern markets and small hative markets, which did not identify any Salmonella spp bacteria contamination.
Pengaruh Aklimatisasi Lumpur Aktif terhadap Limbah Cair dari Pabrik Pangan Nur Afiah; Muh. Rapi; Jamilah Jamilah
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): 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.v10i2.5252

Abstract

This study aims to: 1) Determine the effect of active sludge on reducing pollutant levels in liquid waste; 2) Knowing the combination of activated sludge and liquid waste in order to reduce environmental pollution. The type of research used is True Experimental Design research using a completely randomized design (CRD). This study consisted of 4 treatments with 5 repetitions so that there were 20 units. The first treatment was used as a control containing 100% liquid waste from food factories, the second treatment used 10 grams of activated sludge and 500 ml of food factory liquid waste, the third treatment used 10 grams of activated sludge and 600 ml of food factory liquid waste, and the fourth treatment used 10 grams activated sludge and 700 ml of food waste. The results showed that the process of acclimatization of activated sludge to liquid food waste had an effect on reducing pollutant levels of liquid food waste, as seen from the decrease in TSS (Total Suspended Solid) from 3.68 mg⁄L to 1.34 mg⁄L in treatment A, 1.3 mg⁄L treatment B, 1.32 mg⁄L in treatment C, COD (Chemical Oxygen Demand) from 32.16 mg⁄L decreased to 8.32 mg⁄L in treatment A, 11.84 mg⁄L in treatment B, and 9.28 mg⁄L in treatment C, and BOD (Biochemical Oxygen Demand) from 16.14 mg⁄L decreased to 4.12 mg⁄L in treatment A, 5.7 mg⁄L in treatment B , and 5.4 mg⁄L in treatment C and the effect of activated sludge treatment on liquid waste was evident that treatment A (10 grams of activated sludge and 500 ml of food liquid waste) had a significant effect on reducing pollutant levels from food factory wastewater.
Karakteristik Biometrik, Morfologi Telur, dan Habitat Ikan Padi Oryzias javanicus (Beloniformes, Adrianichthyidae) Asal Desa Linduk, Pesisir Teluk Banten Muh. Herjayanto; Mas Bayu Syamsunarno; Ahmad Fahrul Syarif; Edo Ahmad Solahudin; Novita Rahmayanti; Exel Muhamad Rizki; Akhsan Fikrillah Paricahya; Kamaludin Ahmadi; Abdul Gani; Esa Rama Widiyawan; Adi Susanto; Muta Ali Khalifa
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): 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.v10i2.4361

Abstract

Information on the biometric characteristics, egg morphology, and habitat of O. javanicus are very important for its use as model fish in the laboratory, ornamental fish, and environmental bioindicators. Therefore, research is needed to analyze the biometric character, egg morphology, and habitat of ricefish O. javanicus in the brackish water pond of Banten Bay. This research was conducted non-eperimentally by observing biometric characters to examine meristic, morphometric, and sex dimorphism characteristics. Observations of egg morphology were macroscopic and microscopic characteristics. Habitat characteristics were observed by measuring water quality in situ. The results showed that O. javanicus from Linduk had meristic characteristics D.6–7; A.21–22; P.9-10; V.5–6 and sex dimorphism in the shape and size of the dorsal and anal fins. Blue metallic color pattern on the head and yellow color on the fins are potentially ornamental fish. O. javanicus eggs have a diameter of 1.08 ± 0.02 mm, are equipped with attaching filaments and non-attaching. The non-attaching filaments are 0.14 ± 0.03 mm in length. The percentage of yolk area was 73.7 ± 4.85%, and the oil droplet area was 8.3 ± 0.54% of O. javanicus at the gastrula stage with egg yolk volume 0.349 ± 0.048 mm3. Water quality in this study is a reference for rearing O. javanicus in the laboratory.

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