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KARAKTERISASI BIOPLASTIK DARI PEKTIN KULIT LABU KUNING (CUCURBITA MOSCHATA DURCH) Listyarini, Risnita Vicky; Susilawati, Puspita Ratna; Cahyaningrum, Rosalia; Tonapa, Nely
Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 1 (2020): Hydrogen: Jurnal Kependidikan Kimia
Publisher : IKIP Mataram

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

Pumpkin (Cucurbita moschata Durch) is one of the vegetable plants that are generally consumed as food. Pumpkin skin is a waste that has potential as a raw material for making bioplastics because it has pectin content. The characteristics of pectin that are gel become a reference in making bioplastics. Bioplastic synthesis consists of four steps, namely the making of pumpkin peel flour, pectin extraction, bioplastic synthesis, and bioplastic characterization. The experimental results show that pumpkin skin waste can be extracted with HCl solution and produce pectin in a ratio of0.1:10 grams (w/w). The results of FTIR spectra characterization showed that bioplastics included pectin which produced absorption of C = O carbonyl groups in 1645 - 1625 cm-1 and C-O stretch groups at 1101 - 1104 cm-1. Bioplastics produced have yellow characteristic. Pumpkin skin waste bioplastics are expected to be an alternative solution to the utilization of waste into products.

Karakterisasi Bioplastik dari Pektin Kulit Labu Kuning (Cucurbita moschata Durch) Listyarini, Risnita Vicky; Susilawati, Puspita Ratna; Cahyaningrum, Rosalia; Tonapa, Nely
Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 1 (2020): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Pumpkin (Cucurbita moschata Durch) is one of the vegetable plants that are generally consumed as food. Pumpkin skin is a waste that has potential as a raw material for making bioplastics because it has pectin content. The characteristics of pectin that are gel become a reference in making bioplastics. Bioplastic synthesis consists of four steps, namely the making of pumpkin peel flour, pectin extraction, bioplastic synthesis, and bioplastic characterization. The experimental results show that pumpkin skin waste can be extracted with HCl solution and produce pectin in a ratio of0.1:10 grams (w/w). The results of FTIR spectra characterization showed that bioplastics included pectin which produced absorption of C = O carbonyl groups in 1645 - 1625 cm-1 and C-O stretch groups at 1101 - 1104 cm-1. Bioplastics produced have yellow characteristic. Pumpkin skin waste bioplastics are expected to be an alternative solution to the utilization of waste into products.

Implementation of Web-Based Virtual Laboratory Media in Learning Puspita Ratna Susilawati
Jurnal Taman Vokasi Vol 7 No 2 (2019)
Publisher : Universitas Sarjanawiyata Tamansiswa

The integration of information and communication technology in learning through the application of virtual laboratory media can be an alternative solution to overcome the constraints of time, cost, and laboratory safety in biology labs. Virtual laboratories are very suitable to be applied to the mechanism of evolution because they involve the context of space and time, and can provide opportunities for students to learn independently and increase active student involvement in learning. These study aims are to determine the effect of the application of virtual laboratory media on the understanding of student concepts; knowing increasing students' understanding of the concept of evolutionary mechanisms, and knowing students' responses after learning with virtual laboratories.This type of research is a pre-experimental design (nondesign) with one group pretest-posttest design. The research subjects were 37 students. The media used as many as 8 web-based virtual laboratory programs (online) that can be freely accessed. Data collection techniques include tests (pretest and posttest) and questionnaires. The pretest and posttest values were analyzed by the T-test while the questionnaire data were analyzed descriptively. The application of web-based virtual laboratory media on the evolution mechanism material influences the understanding of student concepts (t arithmetic> t table then H0 is rejected and H1 is accepted) The application of these media increases students' understanding of the concept of evolutionary mechanisms. The mean value increased from pretest 23.65 to 56.08 at the posttest with an increase of 32.43. Student responses to the application of media in learning showed 91.89% of students felt helped in understanding the process of evolution while 100% of students felt helped in understanding the role of evolution in causing evolution.

Karakteristik Kulit Batang Pohon Inang Lichen di Bukit Bibi, Taman Nasional Gunung Merapi (The Bark Characteristics of Lichen Host Tree in Bukit Bibi, Taman Nasional Gunung Merapi) Puspita Ratna Susilawati
Bioeksperimen: Jurnal Penelitian Biologi Vol 7, No 2: September 2021
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/bioeksperimen.v7i2.11355

Karakteristik kulit batang inang menjadi faktor penentu komunitas corticolous lichen. Beberapa jenis lichen menunjukkan preferensi terhadap karakteristik kulit batang tertentu. Informasi karakteristik kulit batang pohon inang sangat dibutuhkan dalam upaya konservasi terutama untuk red-listed lichen species. Namun penelitian dengan tema tersebut masih terbatas. Penelitian ini bertujuan mengetahui keanekaragaman jenis pohon inang lichen di Bukit Bibi dan mendeskripsikan karakteristiknya. Pohon yang disampling adalah pohon yang ditumbuhi lichen di sepanjang jalur jelajah dengan diameter batang 20 cm DBH. Kulit batang yang disampling adalah kulit batang yang tidak ditumbuhi lichen dan terletak pada ketinggian 130 cm. Karakteristik fisik yang dianalisis meliputi tekstur, kelembaban substrat dan kapasitas menyimpan air sedangkan karakteristik kimia berupa pH. Pohon inang corticolous lichen di Bukit Bibi ada 17 jenis. Karakteristik kulit batang yang bervariasi yaitu tekstur halus sampai kasar dengan celah/ retakan yang dalam; kelembaban substrat antara 8,03% - 63,18%; kapasitas menyimpan air antara 56,06% - 153,33%; dan pH antara 5,05 - 5,89. The characteristics of the host tree bark became a determining factor for the corticolous lichen community. Several types of lichen showed a preference for certain bark characteristics. Information on characteristics of host tree bark was needed in conservation, especially for red-listed lichen species. However, research on this theme was still limited. This study was aimed to determine the diversity of species of lichen host trees in Bukit Bibi and to describe their characteristics. The sampled tree was a tree that was overgrown with lichen along the cruising path with a trunk diameter 20 cm DBH. Sampled bark was a bark that was not overgrown with lichen and was situated at a height of 130 cm. Physical characteristics analyzed included texture, substrate humidity, and water holding capacity while chemical characteristic was pH. There were 17 types of corticolous lichen host trees in Bukit Bibi. Varied bark characteristics were smooth to rough texture with deep cracks; substrate humidity between 8.03% - 63.18%; water storage capacity between 56.06% - 153.33%; and pH between 5.05 - 5.89.

Implementasi Flipped Classroom pada Materi Whole Mount (Asetolisis Polen dan Spora) untuk Meningkatkan Pemahaman Mahasiswa Puspita Ratna Susilawati
Bioscientist : Jurnal Ilmiah Biologi Vol 8, No 2 (2020): 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/bjib.v8i2.3093

The implementation of the flipped classroom model was one of the efforts to prepare quality human resources and master the skills of the 21st century. Face-to-face activities that were more of an analysis, evaluating, and creating in a flipped classroom could train critical thinking skills and had a direct impact on students' understanding. The purpose of this study was to analyze the implementation of the flipped classroom model and its effect on students' understanding of the whole mount material (pollen and spore acetolysis) in microtechnique courses. This research was a quasi-experiment with nonequivalent control group design. The independent variable was the flipped classroom model, while the dependent variable was student understanding. Test (pretest and posttest) was used as data collection techniques. Data analysis was performed by calculating the N-gain then t-test. The learning design was divided into pre-class, in-class, and post-class stages. The in-class stage is designed using the practicum method. The results showed that the percentage of students with high and moderate N-gain categories in the control group was 43.76%, while in the treatment group was higher, namely 64.87%. The implementation of a flipped classroom could improve student understanding of lecture material.

Penerapan Flipped Learning pada Materi Metode Squash pada Mata Kuliah Mikroteknik Puspita Ratna Susilawati
BIOEDUSCIENCE Vol 4 No 2 (2020): BIOEDUSCIENCE
Publisher : Universitas Muhammadiyah Prof. Dr. Hamka

Background: The implementation of flipped learning could be one of the solutions offered so that practicum that was limit by time could be carried out. This study aimed to determine the effect of implementing the flipped learning model on student understanding of the squash method material in microtechnique courses. Methods: This quasi study used a non-equivalent control group design. In the treatment group the flipped learning model was applied and an analysis of its effect on student understanding was carried out. The research data were obtained through the pretest and posttest. The pretest is used to evaluate the ability to remembering and understanding, while the posttest evaluates the ability to analyze, evaluate and create. The pretest and posttest value data were used to calculate the N-gain value, then the Mann-Whitney U test was performed to determine the difference between the two. Results: The increase in the mean value in the treatment class was higher than in the control class. The treatment class was 5.2, while the control class was 0.82. The percentage of students who showed a high and moderate N-gain score in the treatment class was 54.05%, while the control class was 40%. There was no difference between the N-gain value in the treatment and control classes. The flipped learning model's implementation did not affect student understanding but had been able to increase student understanding of the squash method material. Conclusions: The flipped learning model could be applied as a solution to practical problems constrained by time constraints.

Bioplastic from Pectin of Dragon Fruit (Hylocereus polyrhizus) Peel Risnita Vicky Listyarini; Puspita Ratna Susilawati; Esther Natalia Nukung; Maria Anastasia Toyo Yua
Jurnal Kimia Sains dan Aplikasi Vol 23, No 6 (2020): Volume 23 Issue 6 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Plastic derived from petroleum is challenging to degrade and pollute the environment. There are alternatives to making biodegradable plastics to reduce the adverse effects of plastics on the environment. This study aims to utilize dragon fruit peel waste as a material for making bioplastic. Plastic characterization was carried out by FTIR analysis to determine the functional groups contained in bioplastics. The results showed that dragon fruit peel could be extracted by HCl solution, and the pectin yield is 11%. Extracted pectin was used to make bioplastics with and without the addition of ethylene glycol. The results showed that moisture content of bioplastics of dragon fruit peel pectin is 5.71–12%, while dragon fruit peel pectin and ethylene glycol are 2.86–5.71%. FT-IR spectra showed that the bioplastics from dragon fruit peels belong to the pectin group, which produces carbonyl absorption at 1636–1628 cm-1 and stretching C-O stretch at 1098–1101 cm‑1.

Penerapan Flipped Learning pada Materi Metode Squash pada Mata Kuliah Mikroteknik Puspita Ratna Susilawati
BIOEDUSCIENCE Vol 4 No 2 (2020): BIOEDUSCIENCE
Publisher : Universitas Muhammadiyah Prof. Dr. Hamka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/j.bes/424825

Background: The implementation of flipped learning could be one of the solutions offered so that practicum that was limit by time could be carried out. This study aimed to determine the effect of implementing the flipped learning model on student understanding of the squash method material in microtechnique courses. Methods: This quasi study used a non-equivalent control group design. In the treatment group the flipped learning model was applied and an analysis of its effect on student understanding was carried out. The research data were obtained through the pretest and posttest. The pretest is used to evaluate the ability to remembering and understanding, while the posttest evaluates the ability to analyze, evaluate and create. The pretest and posttest value data were used to calculate the N-gain value, then the Mann-Whitney U test was performed to determine the difference between the two. Results: The increase in the mean value in the treatment class was higher than in the control class. The treatment class was 5.2, while the control class was 0.82. The percentage of students who showed a high and moderate N-gain score in the treatment class was 54.05%, while the control class was 40%. There was no difference between the N-gain value in the treatment and control classes. The flipped learning model's implementation did not affect student understanding but had been able to increase student understanding of the squash method material. Conclusions: The flipped learning model could be applied as a solution to practical problems constrained by time constraints.

Remediasi Pembelajaran Biologi bagi Peserta Didik Kelas X IPS dan XI MIPA : Praktik Pengabdian Berbasis Pendidikan Puspita Ratna Susilawati; Irenne Odly Kathleen Pasassung; Hardian Nico Thomas Saputro; Niluh Sulistyani; Cyrenia Novella Krisnamurti
Jurnal Pengabdian UNDIKMA Vol 5, No 1 (2024): February
Publisher : Universitas Pendidikan Mandalika (UNDIKMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jpu.v5i1.9377

This community service aims to help Santa Maria Yogyakarta Dormitory students overcome learning difficulties through a biology learning remediation program. The method of implementing this community service used tutoring. The service participants consisted of students from class X IPS and XI MIPA who lived at the Santa Maria Dormitory in Yogyakarta. The evaluation instrument for this activity uses closed and open questionnaires, which are analyzed descriptively. The service results showed that students' problems are difficulty understanding the material, feeling lazy, and bored with studying biology. This problem could be overcome by applying fun learning methods and media. Student responsed to the biology learning remediation program were classified as very high, and the impact felt by students is relatively high.

Penerapan Flipped Learning pada Materi Metode Squash pada Mata Kuliah Mikroteknik Puspita Ratna Susilawati
BIOEDUSCIENCE Vol 4 No 2 (2020): BIOEDUSCIENCE
Publisher : Universitas Muhammadiyah Prof. Dr. Hamka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/j.bes/424825

Background: The implementation of flipped learning could be one of the solutions offered so that practicum that was limit by time could be carried out. This study aimed to determine the effect of implementing the flipped learning model on student understanding of the squash method material in microtechnique courses. Methods: This quasi study used a non-equivalent control group design. In the treatment group the flipped learning model was applied and an analysis of its effect on student understanding was carried out. The research data were obtained through the pretest and posttest. The pretest is used to evaluate the ability to remembering and understanding, while the posttest evaluates the ability to analyze, evaluate and create. The pretest and posttest value data were used to calculate the N-gain value, then the Mann-Whitney U test was performed to determine the difference between the two. Results: The increase in the mean value in the treatment class was higher than in the control class. The treatment class was 5.2, while the control class was 0.82. The percentage of students who showed a high and moderate N-gain score in the treatment class was 54.05%, while the control class was 40%. There was no difference between the N-gain value in the treatment and control classes. The flipped learning model's implementation did not affect student understanding but had been able to increase student understanding of the squash method material. Conclusions: The flipped learning model could be applied as a solution to practical problems constrained by time constraints.

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