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All Journal BERKALA SAINSTEK Alchemy Jurnal Penelitian Kimia Edufisika: Jurnal Pendidikan Fisika Science Education and Application Journal Interdisciplinary Social Studies INSECTA: Integrative Science Education and Teaching Activity Journal Journal of Biological Science and Education
Siska Ayu Wulandari, Siska Ayu
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Energy Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences

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BIODIESEL SYNTHESIS OF COTTON SEEDS OIL (CEIBA PENTANDRA) BY CHEMICALLY TRANSESTERIFICATION PROCESS AND ION FRAGMENTATION OF METHYL ESTE Gunawan, Erin Ryantin; Wulandari, Siska Ayu; Yuanita, Emmy; Suhendra, Dedy
Alchemy Jurnal Penelitian Kimia Vol 10, No 2 (2014)
Publisher : Alchemy Jurnal Penelitian Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Fossil fuel is Commercial energy sources in many communities where their abundance progressively reduced and the resulting environmental pollution. Biodiesel is one alternative fuel made from vegetable oils are suitable to replace the function of fossil fuels and environmentally friendly. Synthesis of biodiesel from cotton seeds oil was carried out by chemically transesterification process. Composition of methyl esters in biodiesel and was analyzed by GC-MS are methyl palmitate (16.71 %), methyl 8,11- octadecadienoic (46.45 %) and methyl linoleate (4.21 %). The highest biodiesel produced from the conversion of the cotton seeds oil amounted to 93.7 % in weight ratio of oil and methanol (1:1) with the catalyst KOH 1 % (w/w of oil). Chemical properties of biodiesel produced meets the standard SNI 04-7182-2006 include saponification value of 120.167  mg KOH / g, acid value of 0.28 mg KOH / g and iod value 55.84 g  iod/100g.
Bird Community Structure (Avifauna) in The Coastal Forest Area of Baluran National Park Wulandari, Siska Ayu; Santoso, Agus
Journal of Biological Science and Education Vol 2, No 2 (2020): December
Publisher : Journal of Biological Science and Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31327/jbse.v2i2.1350

Abstract

Baluran National Park is a Natural Resources Conservation area. Avifauna is a perfect indicator to determine environmental health and the value of biodiversity as a whole. This study aimed to assess the diversity of avifauna species and their abundance in Baluran National Park. This research using a combination line transect and point count method. The results showed that Baluran National Park has high species diversity. Species found during the study were 36 of 24 families. As many as 11% (4 species) of birds are in a large category, 39% (14 species) in a general category, 19% (7 species) in a frequent category, 6% (2 species) in an uncommon category and 25% (9 species) in a rare category. Based on the research results, it can be concluded that there are various kinds of avifauna in Baluran National Park.Keywords:  Avifauna,  Baluran National Park, Diversity, Line Transect, Point Count. 
Synthesis of Zeolite-NaY for Methane Adsorption Susanti, Indri; Wulandari, Siska Ayu; Rosdiana, Silvi Rosiva
BERKALA SAINSTEK Vol 10 No 2 (2022)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v10i2.31356

Abstract

This research aims to synthesize zeolite-NaY material which is then applied as an adsorbent for methane adsorption. Zeolite-NaY was synthesized by hydrothermal method and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and isotherm adsorption-desorption N2 (BET). The characterization results showed that synthesized zeolite-NaY had a diffraction peak with the highest intensity at 2θ = 6° and its morphology showed octahedral crystals. Zeolite-NaY was then applied as an adsorbent for methane adsorption. The methane adsorption test on zeolite-NaY was carried out using the gravimetric method at temperature of 30 °C and pressure of 1 bar. The data was recorded of increasing time every 1 minute until constant. The adsorption test results showed that the methane adsorption capacity on the zeolite-NaY material was 0.436 % wt.
QUARTET LEARNING MEDIA AND STUDENT ARGUMENTATION: DEVELOPMENT ANALYSIS AND CORRELATION IN SCIENCE LEARNING IN JUNIOR HIGH SCHOOLS Qolbyatin, Nur Asa; Septaria, Kiki; Wulandari, Siska Ayu
INSECTA: Integrative Science Education and Teaching Activity Journal Vol. 4 No. 2 (2023)
Publisher : Science Education, Institut Agama Islam Negeri Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21154/insecta.v4i2.7012

Abstract

Argumentation is essential in scientific learning activities because it helps students grasp concepts and apply their knowledge in real-life situations by presenting the same notion in multiple settings. The purpose of this study is to investigate students' scientific argumentation skills using a science quartet educational game. The Research and Development approach is used in this study, along with the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model phases. This study's sample consisted of class VIIIB students from SMPN 2 Sugio, with a small group trial of 15 students and a large group test of 32 students, for a total of 47 individuals. Techniques for gathering data include observation, testing, and surveys. This study included four specialists: media experts, practitioners, material experts, and linguists. The validity test, N-gain, t-test, and correlation were used to examine the data. The validity test findings demonstrated the practicality of the scientific quartet educational game with percentages of 86% and 100%, indicating extremely valid categories. The science educational game quartet had an influence on students' scientific arguments with a significant value of 0.05, as indicated by an increase in the cognitive N-gain test results and students' scientific arguments by 0.75 (high category) after evaluating the paired sample t-test. The correlation test findings revealed a link between the science quartet educational game and students' science arguments with a significance value of 0.05, placing it in the strong positive category. The findings of the study show that science quartet educational game are useful in the learning process.
EFIKASI DIRI SISWA MELALUI LEMBAR KERJA PESERTA DIDIK BERBASIS TINJAUAN EMPIRIS TEORETIS Rosdiana, Silvi Rosiva; Wulandari, Siska Ayu; Susanti, Indri; Aisyurrahman, Dimas Fahmi; Setiawan, Anhar
EduFisika: Jurnal Pendidikan Fisika Vol 7 No 2 (2022): Edufisika: Jurnal Pendidikan Fisika Volume 7 Nomor 02 Desember 2022
Publisher : Program Studi Pendidikan Fisika FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59052/edufisika.v7i2.21298

Abstract

The same thinking or giving the exact solution when expressed by several students in open-ended questions or High Order Thinking Skills (HOTS) indicates a lack of self-efficacy. This is the background of the purpose of this study to measure self-efficacy through Student Worksheets based on empirical and theoretical reviews on static fluid materials. This study is quasi-experimental because it uses a pre-post-test control group design. Sampling will be done using a purposive sampling technique. The samples were junior high school students in one of the Lamongan districts. The results of this study indicate that the Student Worksheet based on the theoretical, empirical review can increase students’ self-efficacy. An increase in self-efficacy was observed from the average value at the time of the pre-test, 62.68%, to 71.95% at the time of the post-test. The results of these values are classified as good improvement according to the Likert scale. Self-efficacy is measured using six indicators (scientific content, problem-solving ability, laboratory usage, daily application, scientific communication, and scientific literacy). Scientific literacy indicators get the lowest average value caused by the low interest of students in learning a concept. Therefore, it is necessary to conduct further research on the relationship between student interest and self-efficacy.
Analisis Fisika-Kimia Perairan dan Komunitas Bakteri terkait Kemunculan Penyakit Ice-ice pada Rumput laut (Kappaphycus alvarezii) Wulandari, Siska Ayu; Isdiantoni, Isdiantoni Isdiantoni; Prasetyo, Endry Nurgoho
Science Education and Application Journal Vol 2 No 2 (2020): Science Education and Application Journal
Publisher : Program Studi Pendidikan IPA, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/seaj.v2i2.277

Abstract

Penyakit ice-ice merupakan penyakit yang menyerang rumput laut golongan karaginofit terutama Kappaphycus alvarezii.  Penyakit ini menyebabkan penurunan produksi rumput laut dengan menurunkan kualitas karaginan. Oleh karena itu, penanggulangan penyakit ice-ice perlu dilakukan untuk meningkatkan kualitas rumput laut melalui deteksi dan identifikasi bakteri terkait penyakit ice-ice pada kedalaman berbeda sehingga dapat ditentukan kedalaman terbaik budidaya rumput laut dalam menghindari infeksi penyakit ice-ice. Isolasi bakteri dari perairan K. alvarezii dilakukan dengan metode pengenceran bertingkat dan metode sebar. Data isolat bakteri penyebab ice-ice yang didapatkan dianalisis secara deskriptif. Berdasarkan hasil penelitian diketahui bahwa komunitas bakteri direct attack teridentifikasi dari genus Bacillus dan Vibro terdistribusi pada kedalaman 20 cm. Bakteri direct attack mampu melakukan aktifitas karaginase dan menghasilkan selulase untuk menyerang thallus K.alvarezii, maka penanaman K. alvarezii dapat dilakukan pada kedalaman lebih dari 20 cm untuk menghindari dampak yang lebih besar dari penyakit ice-ice.
Cultivation Methods Using Kajarula Technology to Increase the Productivity of Seaweed (Kappaphycus alvarezii) Wulandari, Siska Ayu
Interdisciplinary Social Studies Vol. 4 No. 4 (2025): Regular Issue: July-September 2025
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/iss.v4i4.931

Abstract

Seaweed (Kappaphycus alvarezii) is a potential marine biological resource in Indonesia, especially in Palasa Village, Sumenep, East Java. The conventional (long-line) method applied in cultivation is still not effective and efficient enough. The urgency in this study is that the decrease in production output is influenced by environmental disturbances, such as pest attacks, strong currents and waves, as well as the problem of using plastic bottle floats in conventional cultivation methods that are not environmentally friendly. Therefore, there is a need to develop cultivation methods to increase seaweed productivity. This study aims to analyze seaweed productivity using Kajarula (Seaweed Net Bag) technology at the cultivation location of Palasa Village, Sumenep, East Java. This study uses the Group Random Design (RAK) method. The research began with the measurement of the physical-chemical quality of the waters, the creation of a design for making Kajarula from the clumps, monitoring the growth of seaweed, monitoring the quality of waters, monitoring pests and diseases, and the productivity of seaweed. Data analysis using seaweed productivity parameters including biomass production, relative growth, growth, absolute growth rate, and total harvest. The data obtained is then tabulated using the Ms. Excel application to produce representative data in the form of graphs and tables, and analyzed descriptively. From the results of the study, seaweed cultivated for 42 days produced an average biomass production of 5.54 ± 0.27 kg/unit, a relative growth of 153.41 ± 10.97%/day; growth 754 ± 27 g/binding point; absolute growth rate of 239.32 ± 21.95 g/day; and a total harvest of 5.26 – 5.82 kg/unit of bag. The water quality condition in these waters is in the optimal range in supporting the growth of seaweed. Productivity of cultivation, seaweed using Kajarula technology shows optimal growth and yield.
Integration of Local Wisdom in the Conservation of Seaweed (Kappaphycus alvarezii) in Tanjung Village, Pamekasan, Madura Wulandari, Siska Ayu; Isdiantoni
Science Education and Application Journal Vol 7 No 2 (2025): Science Education and Application Journal
Publisher : Program Studi Pendidikan IPA, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/seaj.v7i2.1309

Abstract

Seaweed cultivation (Kappaphycus alvarezii) is the primary source of livelihood for the coastal communities of Tanjung Village, Pamekasan, Madura. This study aims to examine the role of local wisdom in seaweed conservation, including traditional practices that support the coastal ecosystem. The research employed a qualitative approach using semi-structured interviews conducted with 15 key informants, including seaweed farmers, traditional leaders, and village officials. This was followed by a Focus Group Discussion (FGD) with 10 participants from seaweed farmer groups to confirm data and collectively discuss conservation and local wisdom issues. The collected data were analyzed using thematic analysis techniques to establish the relationship between traditional practices and the sustainability of seaweed. The study indicates that the local wisdom practiced by the Tanjung Village community, such as sasi rules (a traditional prohibition system) and traditional planting methods, contributes significantly to the conservation of Kappaphycus alvarezii seaweed. This local wisdom not only preserves the availability of seaweed resources but also strengthens social cohesion within the community. The integration of local wisdom with modern technology has the potential to enhance the effectiveness of conservation and seaweed productivity. Recommendations for advancing the cultivation of Kappaphycus alvarezii in Tanjung Village include: Collaboration between modern science and traditional practices is necessary to develop environmentally friendly and productive cultivation techniques, and the development of a community-based conservation model involving traditional leaders, farmers, and village officials is crucial for sustainable seaweed resource management.
Co-Authors Agus Santoso Aisyurrahman, Dimas Fahmi Dedy Suhendra Emmy Yuanita Erin Ryantin Gunawan Indri Susanti Isdiantoni Isdiantoni, Isdiantoni Isdiantoni KIKI SEPTARIA Prasetyo, Endry Nurgoho Qolbyatin, Nur Asa Rohmah, Alissa Nazilatur ROSIVA ROSDIANA, SILVI Setiawan, Anhar