Jurnal Mangifera Edu
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Induction Shoots From Callus of Cucumber Apple (Cucumis sp.) Using a Combination of Benzil Amino Purine and Naphtalene Acetic Acid Concentrations In Vitro
Full text linkResearch on indirect organogenesis of cucumber apple (Cucumis sp.) was conducted from March to May 2020. This study aims to find the best combination between Benzyl Amino Purine (BAP) and Naphthalene Acetic Acid (NAA) on the growth of cucumber apple (Cucumis) sp.) on Gamborg media (B5) by organogenesis. The callus used came fromcucumber seeds explants with a concentration of NAA 2,0 mg/l + BAP 0,2 mg/l using Murashige and Skoog media. The research method used is an experimental method with nonparametric statistics with 24 treatments repeated three times and analyzed descriptively using the Kruskal Wallis test. The results showed that the best treatment of cucumber apple shoots was the combination of NAA and BAP, namely the B4N2 treatment (2,5 ppm BAP + 0,20 ppm NAA) with shoot height (0,45 cm). At a single concentration, a concentration of 1 ppm BAP was able to provide a faster effect on shoot formation time, namely at 24 days after initiation (hsi) and the best response to shooting height (0,5cm)
Development of Biological Assessment Based on Science Process Skills In Senior High School City of Palembang
Full text linkThe research background is that it can develop biological assessment based on science process skills because science process skills are important for logical thinking to train students' thinking skills. From the results of the initial needs analysis of class X questions, science process skills are still low, the teacher has not fully developed the science process skills-based assessment because it still uses questions from biology books. This study aims to determine the characteristics and feasibility of assessment based on science process skills developed in biology class X semester 2. This research is development research. Development is carried out using a procedural model by adapting Mcintire's research and development model, with 4 stages of test development including defining competencies, test participants and test objectives, developing test plans, compiling test items, writing administrative instructions. This research stage is limited because it only wants to know the characteristics and feasibility of the assessment. The research instrument used an interview sheet, a questionnaire sheet, and an observation sheet. Expert validation was carried out by 6 expert validators: (1) material experts; (2) linguists; and (3) evaluation experts; The data analysis technique uses qualitative descriptive that refers to the formula adapted by Sugiyono (2018) with a scale of 4. The results of this study are in the form of a biological assessment based on science process skills in the form of multiple-choice questions in which there is biology material for class X semester 2. Biological assessment characteristics are based on science process skills, namely using indicators consisting of observing, grouping, interpreting, predicting, asking questions, hypothesizing, planning experiments, applying concepts, and communicating. The feasibility of a biological assessment based on science process skills based on expert validators, the results are valid to very valid so that the biological assessment based on science process skills developed is feasible to be used to measure the science process skills of class X students
The Development of Kefir Milk Student Worksheets Based on Free Inquiry on Biotechnology Course
Full text link The background of this research is that there are still errors in the practice of making milk kefir in the biotechnology practice guide. Therefore, it is necessary to develop a free inquiry-based kefir worksheet that can be used by prospective teacher students in biotechnology courses. The method used is the research and development method which consists of define, design, and develop stages. Data collection techniques using the method of observation and questionnaires. The subjects of this study were the sixth semester biology education students. The results showed the validity of the questionnaire items had a score of 0.65 with the category of "high" validity. The feasibility test results obtained a value of 88.68% with the category "feasible". Readability test has a value of 87.65 with the category "very high". The average student performance score of 94% with the category of "very good", and the value of the use of worksheet scored 92.56%
Efektivitas Pembelajaran Vee Diagram dalam Meminimalisir Kesalahan pada Perancangan Eksperimen
Full text linkDesigning experiments is activity-based laboratory learning where laboratory activities lead to scientific ideas which emphasizes qualitative processes that aim to encourage conceptual changing toward the students. Experimental designs made by students are still found many mistakes. These in designing experiments could be minimized by applying vee diagrams. The application of Vee Diagrams helps students in designing experiments, therefor it can minimize the mistakes commonly done in designing experiments especiallyin practical learning. The research method was used is action research consisting of two cycles. The decrease of error in designing experiments is analyzed as a percentage at each research cycle. The data were sourced from third semester biology education students who taking biochemistry courses. Data obtained from the error analysis rubric in designing experiments, questionnaire responses of students in design experiments and vee diagrams rubric. The results showed that the application of vee diagrams can minimize errors in design experiments with the greatest decrease in errors at the stage of making hypotheses while the smallest decrease at the stage of analyzing data
Soil Chitinolytic Bacteria from Jambi Province to Produce Antifungal of Plant Pathogens
Full text linkChitinolytic bacteria are bacteria that have chitinolytic activity, which is able to hydrolysis the composition of chitin which composes many fungal cell walls. Chitinolytic bacteria are currently more widely used because of their ability as a biological control agent to the pathogenic fungi especially in horticultural and plantation crops. This research was conducted with the aim of obtaining isolates of chitinolytic bacteria that were able to inhibit the growth of plant pathogenic fungi in Vitro on chitin agar media. Fusarium oxysporum, Sclerotium rolfsii, and Rhizoctonia solanii are used in the inhibition test of chitinolytic bacteria. Bacteria were isolated and screened from the soil of Bukit Dua Belas National Park and Oil Palm Plantations in Jambi using 0.3% chitin agar media. The results showed that two of 10 bacterial isolates were able to produce inhibition zones to the growth of hyphae of pathogenic fungi on potato dextrose agar (PDA) media. TB04-13 isolate was able to produce the largest inhibition in F. oxysporum and R. solanii about 42% and 42.05% respectively, while TB04-15 isolate produced the biggest inhibition in S. Rolfsii ranged to 25.50%. Based on the chitinolytic index (CI) values, isolates TB04-13 and TB04-15 produced CI values of 1.60 and 0.63, respectively. The morphological characteristics and Gram staining of both TB04-13 and TB04-15 chitinolytic isolates are included in rod-shaped and Gram-positive bacteria. Both of these isolates can be used as antifungal-producing candidates for plant pathogenic fungi in Indonesia
Growth Pattern Study of Slender Walking Catfish (Clarias nieuhofii) as Environmental Biology Indicator
Full text linkSlender walking catfish (Clarias nieuhofii) is a consumption fish that has a fairly high economical value. Local market prices can reach IRD 50.000-70.000/kg. People love this fish because of the delicious taste of the meat, which very different from the aquaculture catfish. Until now the production relies only on natural catches and there have been no cultivation efforts. But in recent years these out catfish are increasingly difficult to find in nature. The conversion of land into plantation areas caused the loss of the fish's original habitat. Based on community information, the habitat of this fish is found in Pasir Putih Village, Silangkitang District, Labuhan Batu Selatan Regency, and Bandar Tinggi Village, Bilah Hulu District, Labuhanbatu Regency, Indonesia. Differences in habitat conditions are known to affect fish growth patterns, including C. nieuhofii. This research aims to determine the pattern of the growth of the slender walking catfish in these different habitat conditions. Exploratory methods were used in this research and observation stations were determined through purposive sampling. Fish sampling was done using a fishing rod. The samples of fish captured were measured by the total length and weight. The results of the research show that the pattern of fish growth in Pasir Putih Village is negative allometric (W = 0.6944, b = 0.2463 and R2 = 0.9468) and in Bandar Tinggi Village shows negative allometric (W = 10.207, b = - 129.56, and R2 = 0.9711)
Persepsi Guru Biologi Terhadap Kompetensi Pedagogik Mahasiswa Calon Guru Biologi di Kabupaten Sikka
Full text linkTeacher competency is assumed to still be one of the factors that can determine student learning success. This problem needs to be explored further so that the cause can be known with certainty. This research aims to analyse the perception of biological teachers on pedagogic competence of prospective biological teachers in Sikka district. Pedagogic competence is one of the important components that also determine the success of the learning process in school. Prospective teachers need to equip these competencies so that they can apply them in the workforce. The perception of biological teachers on pedagogic competence of prospective biological teachers has a role in determining the progress of the learning process. In conducting this research, the researcher uses descriptive qualitative approach. Data sources come from biology teachers in 6 senior high schools (1 SMA Negeri and 5 SMA Swasta) in district Sikka. In wich the subject of this research is using purposive sampling technique. The data collected through interviews, questionare and document study. The validity of the data is determined using the credibility, transferability, dependability, and confirmability. Data analysis technique used refers to the concept of data reduction, data display, and conclusions or verifications. The results showed that the perception of biological teachers on pedagogic competence of prospective biological teachers in Sikka district belongs to acceptable category, although for the dimension of learning process that can inspire students learning motivation still have problem that need to be improved
Ethnobiology Study on Nature and Processing Plants and Animals in Traditional Sea-Picking of Banyuwangi Regency
Full text linkThe traditional sea-picking ceremony is a ritual carried out by the community as a form of gratitude for the abundance of sustenance provided by God, as well as for asking the safety of fishermen. Besides aiming for blessings and safety, the traditional sea picking ceremony also has an important role as a means of communication for fishermen and maintaining harmony among religious communities, therefore this traditional sea picking ceremony must be held once every year. The purpose of this study was to observe the nature and processing of plants and animals at sea picking ceremony and to find out the Use Value (UV) of plants, animals and the natural environment used. Sampling of informants was done by Purposive Sampling and Snowball Sampling; data obtained using semistructured interviews with open ended question types. The results showed there were 66 species from 37 plant families and 3 species from two animal families. While the Use Value (UV) analysis indicates that there were 12 plant species and one animal species that have a high Use Value (UV) which is 1, it shows that the species is most widely used in traditional sea picking ceremonies. Generally, it needs more efforts for further conservation
Analisis Aktivitas Belajar Siswa Kelas X pada Mata Pelajaran Biologi di SMA Negeri 10 Palembang
Full text linkLearning activities are activities carried out to produce changes in knowledge and skills in students. Learning activities contribute to the learning outcomes that students will get. The purpose of this study was to determine student learning activities in class X virus material at SMA Negeri 10 Palembang. This research is a type of quantitative description research. The study population was all Grade X MIA students of SMA 10 Palembang. Class X MIA 2, MIA 4, MIA 5, and MIA 7 research samples were taken using a purposive sampling technique. Data obtained using observation sheets. The results of class X MIA 2 obtained a percentage of 67% including the excellent category, class X MIA 4 gained a percentage of 67% including the excellent category, class X MIA 5 gained a percentage of 65% including the excellent category and class X MIA 7 with a percentage of 62% including the excellent category. Student learning activities are categorized as useful because students follow learning by carrying out various learning activities. The conclusion is that the average learning activity of class X students of SMA Negeri 10 Palembang on virus material obtains 65%, including the excellent category. The highest percentage is emotional activity and mental activity, with a percentage of 71%. The activity that gets the lowest percentage is drawing activity with a percentage of 48%
Efektivitas Aplikasi Mobile Learning Role Play Games (RPG) Maker MV untuk Meningkatkan Kemampuan Berpikir Kritis
Full text linkStudent learning activities that are less conducive, passive in asking questions and answering questions from problems raised by teachers, difficult to express ideas or ideas of problem solving and the learning process provided, and have not been oriented to develop students' critical thinking skills.The purpose of this study is to determine the feasibility, find out the increase in students' critical thinking skills, and to find out students' responses to the application of RPG maker MV based mobile learning applications in the learning ecosystem. The research method used is Quasi-Experimental, the design used in this study is Quasi-Experimental Design with Randomized Control-Group Pretest-Postest. The data obtained in this study consisted of qualitative data, namely the results of observations of student activities during learning and student questionnaire responses to the application of mobile learning applications based on RPG maker MV, and quantitative data namely the results of students' critical thinking abilities. The results showed (1) the implementation of the RPG maker MV based mobile learning application has moderate criteria, (2) the application of the RPG maker MV based mobile learning application can improve students 'critical thinking skills, (3) students' responses to the use of RPG maker based learning mobile applications MV in ecosystem learning has very good criteria