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Jurnal Pembelajaran dan Biologi Nukleus
Published by Universitas Labuhanbatu
ISSN : 24429481     EISSN : 26857332     DOI : https://doi.org/10.36987/jpbn
Core Subject : Science, Education, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media
Jurnal Pendidikan Biologi merupakan jurnal elektronik yang merupakan wadah penerbitan artikel penelitian original yang terkait dengan penelitian pendidikan biologi. Jurnal ini dikelola oleh Program Studi Pendidikan Biologidibawah naungan LPPM Universitas Labuhanbatu. Jurnal ini diterbitkan dua kali dalam setahun pada bulan Maret dan September. Jurnal ini menyajikan hasil penelitian dibidang Pendidikan Biologi dan sains Biologi.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 437 Documents
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Analysis of Student Learning Difficulties in Online Learning Excretory System Material at Junior High School of SMP Negeri 2 Pinogaluman Al-Hamid, Nurjihan Nissa; Ahmad, Jusna; Dama, Lilan; Nusantari, Elya; Solang, Margaretha; Lamondo, Djuna
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 9, No 3: Jurnal Pembelajaran Dan Biologi Nukleus November 2023
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v9i3.4967

Abstract

Online learning is a learning system that uses internet media in the learning process. Applications that are usually used in online learning are WhatsApp, Youtube, google meet, google Classroom, and other online media. This study aims to determine the difficulties experienced by students during the online learning process on excretory system material at SMP Negeri 2 Pinogaluman. The subjects of the study were classes VIIIA and VIIIB SMP Negeri 2 Pinogaluman for the 2021/2022 Academic Year with a total of 40 respondents. The form of research is Quantitative Description. Data collection techniques in this study were carried out  by survey method, namely by distributing questionnaires using internal factors consisting of cognitive, affective, interest, motivation, and intelligence indicators and using external factors consisting of indicators of the family environment, community environment, and government environment to students. Based on the results of the study, it can be concluded that students experience learning difficulties during the online learning process of excretory system material. The percentage of internal factors and external factors that affect learning difficulties is 66% which indicates that student response is low so that students experience high learning difficulties. Students experience difficulties in cognitive aspects with an average low percentage of  reasoning ability of  49%
Analysis of Biomass Potential, Carbon Stock, Carbon Sequestration, Oxygen Production, and Value of Environmental Services CO2 Uptake in Three Types of Forests in Buton District, Southeast Sulawesi Province, Indonesia Nare, La; Rahman, Fatchur; Novianti, Vivi
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 10, No 1: Jurnal Pembelajaran Dan Biologi Nukleus March 2024
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i1.5076

Abstract

Global warming is a symptom of an increase in the average temperature of the earth's surface. Global warming is caused by the large concentration of greenhouse gases in the atmosphere. One of the biggest greenhouse gases contributing to global warming is carbon dioxide (CO2). Forest vegetation can absorb about 50% of total emissions through a sequestration process stored in biomass in all parts of the plant. The study aimed to determine the potential of biomass, carbon stocks, carbon sequestration, oxygen production, and the CO2 absorption value of environmental services in three types of ecosystems in Buton Regency, Southeast Sulawesi Province. Research sampling was conducted using purposive sampling techniques and roaming methods. Calculation of biomass potential, carbon stock, carbon sequestration, oxygen production, and environmental service value of CO2 uptake using an allometric formula The results of research on the biomass potential of mangrove forests, lambusango forests, and pine forests were respectively, 16,108.27 tons/ha, 84,693.72 tons/ha, and 14,273.98 tons/ha. The potential carbon stock is 8,054.13 tons/ha, 42,346.86 tons/ha, and 7,136.99 tons/ha. The carbon absorption potential is 29,558.67 tons/ha, 155,412.98 tons/ha, and 26,192.75 tons/ha. The potential oxygen production is 21,504.54 tons/ha, 113,066.12 tons/ha, and 19,055.76 tons/ha, while the value of environmental services CO2 absorption is 2,221,038,614.63 Rp/ha, 11,677,731,637.57 Rp/ha, and 1,968,123,759 Rp/ha.
Analysis Of Microbial Culture Learning: Understanding The Relationship Between Technical Competence And Students' Perspectives At Dharmawangsa University, Medan Afriani, Dwi Tika; Rofieq, Ainur; Huda, Atok Miftachul; Eriyanti, Ribut Wahyu; Hasruddin, Hasruddin
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 10, No 1: Jurnal Pembelajaran Dan Biologi Nukleus March 2024
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i1.5370

Abstract

This study examines the relationship between test scores and students' perceptions of learning microbial cultures. The objectives of the research were to determine how students' technical skills correspond with their subjective perceptions of difficulty in various aspects of learning, and to identify the most difficult aspects of learning microbial cultures. Data were collected through tests and questionnaires administered to microbiology practicum students. Analysis revealed a significant correlation between test scores and student perceptions in most aspects of learning, but with variation between aspects. Aspects of basic microbial culture concepts showed a positive correlation, suggesting that students with a strong understanding of the concepts perceived less difficulty. In contrast, bacterial inoculation techniques showed a negative correlation, indicating a mismatch between technical ability and perceived difficulty. The analysis provides a comprehensive view of the factors influencing the learning of microbial culture. The results show that students perceive bacterial inoculation techniques as the most challenging aspect, despite moderately skilled students demonstrating adequate technical ability. Potential sources of technical complexity in the inoculation process, such as steps requiring precision and access to hands-on equipment, contribute to students' perceived difficulty. Although the relationship between test scores and student perceptions of microbial culture learning has been explored in this study, additional research is needed to delve deeper into the complex factors that contribute to this relationship
Rattan Species Inventory in Rawa Singkil Region of Conservation Forest Management Unit Area Syam, Nasrianti; Siregar, Mawaddah Putri Arisma; Kusumawardani, Eva Flourentina; Harahap, Laila Apriani Hasanah; Fadilah, Mardi; Saputra, Firman Firdauz; Siahaan, Perry Boy Chandra
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 9, No 3: Jurnal Pembelajaran Dan Biologi Nukleus November 2023
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v9i3.4357

Abstract

Rawa Singkil region of Conservation Forest Management Area (KPHK) is a sanctuary for fauna teeming with an abundance of plant species. The species diversity is predominantly constituted of rattan and other non-timber forest products. This investigation seeks to compile a list of the various species of rattan found in the Rawa Singkil KPHK region. Therefore, this study was carried out in the Rawa Singkil region of KPHK were located in the Aceh Singkil Regency of Aceh Province, Indonesia. Spanning an area of 82,374 ha, this territory comprises nearly fifty percent peat ecosystem. A survey is utilized as the research strategy, with data acquisition conducted via sampling techniques. Moreover, the acquired data were subjected to descriptive analysis on the basis of morphological attributes, encompassing the following morphological characteristics: 1) the stem (including characteristics such as height, diameter, color, internode length, and thorn shape); 2) the leaf, including its length, ocrea, leaf count, leaf color, and leaf surface; 3) knee (color and outline of the knee); 4) thorn; (spine color, length of longest spines, position of spines, and length of shortest spines). Eight species of rattan were discovered in this region, i.e Plectocomia elongata Mart., Daemonorops mattanensis Becc, Daemonorops melanochaetes, Korthalsia echinometra Becc, and Calamus ornatus Blume
Diversity of Tree Species in Campus Forest of UIN Sulthan Thaha Saifuddin Jambi Wati, Ayu Widya; Susanti, Try; Manurung, Aini Qomariah; Riany, Hesti
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 10, No 1: Jurnal Pembelajaran Dan Biologi Nukleus March 2024
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i1.5039

Abstract

An indicator of the stability of a community within an ecosystem is diversity of species. The absence of data regarding the species diversity in the campus forest of UIN Sulthan Thaha Saifuddin Jambi prompted the conduct of this study, which aimed to identify tree types and calculate the diversity index and evenness index for the campus forest. To achieve this aim, the research site was selected through the implementation of purposive sampling, whereas the plot was determined through the utilization of systematic sampling. Aside from that, tree data was collected in 22 plots using a quadratic method with dimensions of 20 m x 20 m. The research findings revealed the acquisition of 83 tree species, comprising 30 families and a total of 464/8.62 ha individuals. The species of tree that contains the greatest number of individuals is Ixonanthes sp. The genus Ixonanthes exhibited the greatest INP, which measured 37.64%. At 3.70, the species diversity index (H') indicates a significant degree of diversity across categories. Furthermore, the evenness index (E) acquired a value of 0.84, placing it within the category of high evenness
Effectiveness of Rhizospheric Bacteria Microcapsules Addition on The Growth of Cocoa Leaves (Theobroma cacao L.) Refnizuida, Refnizuida; Situmorang, Hadomuan; Hakim, Tharmizi; Ramadhani, Elrisa
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 9, No 3: Jurnal Pembelajaran Dan Biologi Nukleus November 2023
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v9i3.4991

Abstract

Cocoa (Theobroma cacao L.) is one of the main plantation commodities which plays an important role in the Indonesian economy, and 3rd ranked in the world for cocoa producers. One effort to increase cocoa productivity was the use of biological fertilizer. The aim of this research was to determine the effect of using rhizosphere bacterial microcapsules as biofertilizer on the vegetative growth of cocoa leaves. The research design used was a Completely Randomized Design, with two factors, the first was immersion the cocoa beans using a rhizosphere bacterial suspension consisting of A0=0 hours; A1= 8 hours; A2=16 hours and A3=32 hours and the second factor is the addition of microcapsules consisting of C0=0 gram( g ); C1=10gr, C2=20gr, C3=30gr. Combination The treatment was repeated twice so that 32 plants were obtained. For the parameter of observing the number of leaves, the best results were shown in the 8 hour immersion treatment with an average number of leaves of 12.63, followed by the treatment of giving 20 grams of capsules with an average number of leaves of 11.75. The lowest number of leaves was shown in the 16-hour and 32-hour immersion treatments at 10.75. Meanwhile, for the observation parameters of leaf area, the best results were shown in the 32 hour immersion treatment with an average leaf area of 73.49 cm 2 and the lowest results were shown in the non-immersion treatment with an average leaf area of 59.88 cm 2 . The results of the analysis of variance showed that all treatments had no significant effect
Identification of endophytic fungi on the leaves of Rhyzophora stylosa Griff mangrove in the coastal area of Bokonusan Semau Village Rafael, Andriani; Sabuna, Alan Charis; Manifani, Derven
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 10, No 1: Jurnal Pembelajaran Dan Biologi Nukleus March 2024
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i1.5454

Abstract

Rhyzophora stylosa Griff is a mangrove plant that grows on the coast of Bokunusan village, Semau District, Kupang Region. Endophyte fungi are found in plant tissues and can function as agents for controlling pathogenic pests. The purpose of this research was to isolate and identify   endophyte fungi found in the young and mature leaf of R. stylosa Griff at the Mangrove forest, Bokunusan Village, Semau District, East Nusa Tenggara. This research was conducted from November to December 2023 at the Microbiology Laboratory; Biology Study Program, Aretha Wacana Christian University. The method used was the Potato Dextrose Agar (PDA) media and fungal identification based on macroscopic and microscopic characteristics. Based on the results of the study, nine isolate was isolated from young and mature leaf of R. stylosa Griff.   Two endophyte fungi were obtained from R. stylosa Griff leaves. The endophyte fungi found were genus Aspergillus and Trichoderma. 
Optimization of Fermentation and Sensory Quality of Mango Yogurt Using Various Sucrose Concentration Fermented by Lacticaseibaciluus paracasei Strain Shirota Sayuti, Irda; Darmawati, Darmawati; Jumari, Jumari; Hartanto, Adrian
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 10, No 1: Jurnal Pembelajaran Dan Biologi Nukleus March 2024
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i1.5468

Abstract

This research explores the optimization of mango yogurt production, leveraging mango as the primary fermentation ingredient and Lacticaseibacillus paracasei strain Shirota (LcS) as the probiotic inoculum. Traditional yogurt, typically derived from animal milk, faces competition from plant-based alternatives. The research objective is to investigate the impact of inoculum ratios and sucrose concentrations on LcS density and sensory attributes, with a focus on the Substrate to Inoculum Ratio (S/I) as a critical parameter influencing microbial metabolism and population dynamics. Various inoculum ratios (1:1, 1:2, 1:4, 1:8 v/v) and sucrose concentrations (0%, 2.5%, 5%, 7.5%) were applied in mango yogurt production. Results from ANOVA analysis indicated significant differences in LcS density among inoculum ratios (F3,16 = 37.01, P = 0.000) and sucrose concentrations (F3,16 = 19.07, P = 0.000). The 1:2 inoculum ratio and 7.5% sucrose concentration emerged as optimal, as evidenced by stable pH conditions and lactic acid profiles within recommended standards. Sensory analysis, employing a 5-point hedonic scale for color, odor, taste, and texture evaluation, revealed moderate acceptance. In conclusion, this study introduces an innovative approach to mango yogurt production, highlighting the potential of specific inoculum ratios and sucrose concentrations for optimal results. The findings contribute to the broader landscape of plant-based yogurt alternatives, underscoring the need for ongoing refinement to meet commercial standards and ensure consumer satisfaction.
Structure and Composition Seedling Plant in the Campus Forest of UIN Sulthan Thaha Saifuddin Jambi Nurfadillah, Nurfadillah; Susanti, Try; Manurung, Aini Qomariah; Riany, Hesti
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 9, No 3: Jurnal Pembelajaran Dan Biologi Nukleus November 2023
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v9i3.5041

Abstract

Seedlings are the first stands that grow to replace damaged forest vegetation. Seedlings can have a positive impact on the balance of the wider ecosystem, because seedlings are the beginning of an ecosystem regeneration process that is greatly influenced by that ecosystem The purpose of this research to information regarding the structure and composition of seedling in the UIN Sulthan Thaha Saifuddin Jambi Campus Forest. This research was carried out in July 2022 – March 2023. The research location was determined using the Purposive Sampling Method, determining the plot using systematic sampling, and data collection using the quadratic method with a size of 2 m x 2 m. The observation results were analyzed using the Importance Value Index, Shannon-Winner Diversity Index, Morisita Index, and the Evenness Index. The research results found that there were 332 individuals, 84 types of seedlings, belonging to 28 families. The highest Importance Value Index (INP) is Gmelina arborea Roxb (11.19%), the Diversity Index (H') is in the high category (H' 3.94). The evenness index (E) (0.89) is in the high (even) category.
The Effect of Callus Age on Biomass and Flavonoid Production in Talinum paniculatum In Vitro Culture Restiani, Ratih; Aditiyarini, Dwi; Dolonseda, Anggel Christia; Nathania, Yohana Elsa
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 10, No 1: Jurnal Pembelajaran Dan Biologi Nukleus March 2024
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i1.5417

Abstract

Talinum paniculatum (Javanese Ginseng) is an herbaceous plant belonging to Talinaceae family that has been known as an important medicinal plant. Flavonoid is one of the prominent bioactive compounds that are contained in all parts of T. paniculatum and has been known for its several bioactivities, including antioxidant, anti-inflammatory, antimicrobial, antidiabetic, and anti-cancer. Callus culture can be used to ensure the quantity and quality of flavonoid production. Callus age is one of the important factors that needs to be considered in order to produce optimum biomass and flavonoid production. Therefore, this research aimed to investigate the effect of callus age on biomass and flavonoid production in T. panicultaum in vitro culture. Young leaves were used as an explant, and callus induction was performed using MS solid media supplemented with kinetin 3 mg/L and 2.4-D 2 mg/L. Biomass and flavonoid production were observed during 0, 28, 35, 42, and 49 days. Results showed that biomass and flavonoid production were influenced by callus age. The production of flavonoid in T. paniculatum callus culture was not linear with the growth of callus (biomass), and the optimum flavonoid production resulted in the 28th days of callus age (49.100 mg QE/g), while the optimum biomass resulted in the 49th days of callus age (4.295 g). It can be concluded that the optimum conditions for biomass and flavonoid production in T. paniculatum callus culture are influenced by different callus ages

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