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All Journal Dental Journal (Majalah Kedokteran Gigi) Lectura : Jurnal Pendidikan Jurnal Abdi Insani Hydrogen: Jurnal Kependidikan Kimia
Ramadhania, Nurina Rizka
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Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Dentistry Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences

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Characteristics of chitosan from Penaeus monodon on chitosan-gelatin suspension viscosity Prananingrum, Widyasri; Setiawan, Grace Caroline; Putri, Vindya Meinda; Wahyuning, Baiq Nadia Risna; Rahmitasari, Fitria; Sularsih, Sularsih; Ramadhania, Nurina Rizka; Fatmawati, Sri
Dental Journal (Majalah Kedokteran Gigi) Vol. 58 No. 2 (2025): June
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/j.djmkg.v58.i2.p135-143

Abstract

Background: Chitosan synthesized from Penaeus monodon shells was developed into a chitosan-gelatin suspension as an injectable bone substitute for socket preservation. Purpose: To investigate the characteristics of chitosan from P. monodon shells and their influence on the viscosity of a chitosan-gelatin suspension. Methods: P. monodon shells from Tarakan Waters were prepared using three methods: Group 1) deproteinization-depigmentation-deacetylation, Group 2) demineralization-depigmentation-deacetylation, and Group 3) deproteinization-demineralization-depigmentation-deacetylation. The chitosan was characterized by morphology, moisture and ash content, molecular weight (MW), deacetylation degree (DD), and viscosity. This chitosan was made into a chitosan-gelatin suspension with a ratio of 45:55 (w/w%) (95 ml:110 ml). The differences in viscosity of the chitosan-gelatin suspension were determined using Kruskal–Wallis and Mann–Whitney tests. The effects of the chitosan’s MW and DD on the viscosity of the chitosan-gelatin suspension were analyzed using Spearman’s correlation. Results: Group 2 had the highest moisture content (10.63%), MW (159.68 kDa), viscosity of the chitosan powder (5.53 dPa.s), and viscosity of the chitosan-gelatin suspension (40.20 cps). Group 1 had the highest ash content (27.83%) and DD (93.72%). Group 3 showed the lowest ash content (1.06%), MW (37.12 kDa), and DD (86.22%), but it had good viscosity of the chitosan-gelatin suspension (37.25 cps). A significant difference in viscosity was found between the chitosan-gelatin suspension groups. Spearman’s correlation coefficients between the viscosity of the chitosan-gelatin suspension and MW and between the viscosity of the chitosan-gelatin suspension and DD were 0.389 and −0.195, respectively. Conclusion: The viscosity of a chitosan-gelatin suspension is influenced by the MW and DD of the chitosan powder. Chitosan from P. monodon can potentially be an injectable bone substitute in socket preservation.
PELATIHAN DIVERSIFIKASI PRODUK TOGA UNTUK MENINGKATKAN KEMANDIRIAN KESEHATAN SISWA SMA Putri, Devi Anggraini; Mawli, Rizka Efi; Nuraini, April; Ramadhania, Nurina Rizka; Alifah, Nur Fadhilatul; Kaffi, Raisha Aradea
Jurnal Abdi Insani Vol 11 No 4 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i4.1967

Abstract

TOGA diversification is to increase variety of herbal products for their quality, acceptance, and economic value. In Indonesia, TOGA, known as herbs or jamu, is not only used as traditional medicine, but also used as a health supplement to maintain body immunity. Therefore, the community service team strives to improve public health through TOGA diversification training. The targets are high school students who are members of the MPS Botany group of SMAN 1 Bangkalan. The aim of this program is to increase the health independence of targets through TOGA diversification training. The methods are divided into several steps including the preparation, implementation, namely training and workshop, and evaluation through pre- and post-tests and satisfaction surveys. The implemented diversification training has been able to improve the knowledge and skills of targets to produce TOGA made from turmeric into a variety of products including fresh drinks, instant powders, and contemporary drinks. Based on the results of data analysis, 77% of participants experienced an increase in knowledge based on an increase in post-test scores. Then, 68 and 58% of participants respectively assessed the benefits and sustainability of the program as very good. Thus, TOGA diversification training activities are recommended to be continued and developed. This program is expected to be able to improve the health independence of high school students in the future.
Developing Problem-Solving Based E-Student Liveworksheet to Improve Students’ Critical Thinking in Acid-Base Mutiara, Fadilah; Azizah, Utiya; Ramadhania, Nurina Rizka
Lectura : Jurnal Pendidikan Vol. 16 No. 2 (2025): Lectura: Jurnal Pendidikan
Publisher : Fakultas Keguruan dan Ilmu Pendidikan (FKIP), Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/gm7sw652

Abstract

This study is conducted in response to the low levels of students’ critical thinking skills, particularly in interpretation, analysis, inference, and explanation, in the context of acid-base chemistry, as well as the scarcity of digital resources that promote active learning. The objective is to develop a problem-solving-based E-Student Liveworksheet to improve critical thinking skills related to acid-base material. Research and Development (R&D) was employed, following the 4D model (Define, Design, Develop, and Disseminate). The feasibility of the developed worksheet was evaluated using Nieveen’s criteria: validity, practicality, and effectiveness. Data were gathered through expert validation forms, student questionnaires, classroom observations, and critical thinking tests. The study involved eleventh-grade students at Gedangan Senior High School. Validation results showed a mode score of 4, indicating high content validity. The practicality score from student responses reached 95%, categorized as "very good." Effectiveness was demonstrated by n-gain scores ranging from 0.50 to 1.00, reflecting moderate to high improvement across all critical thinking indicators. These findings confirm that the liveworksheet is a valid, practical, and effective tool for enhancing students’ critical thinking in acid-base learning. In conclusion, the developed digital resource supports the goals of the Independent Curriculum by fostering interactive, contextual, and problem-based learning. This innovation offers valuable potential for broader application in science education and serves as a reference for integrating technology to promote higher-order thinking. Future research is recommended to explore its long-term impact and adaptability across various scientific topics and learning environments.
Variation of Polymer Matrix On the Quality of Bioplastic from Cassava Peel Waste from Tapai Industry in Bogor Sholeha, Novia Amalia; Muthmainah, Nada Ghaida; Robyano, Rifky Ardiansyah; Sophia, Halida; Susanti, Indri; Ramadhania, Nurina Rizka
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 4 (2025): August 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i4.16975

Abstract

Plastic waste originating from commercial sources presents significant environmental challenges, leading to the creation of biodegradable alternatives derived from renewable materials. This research investigates the feasibility of utilizing cassava peel starch (CPS), an agro-industrial by-product, as a foundational material for bioplastic manufacturing. To overcome the limitations of pure starch, such as brittleness and insufficient water resistance, a bioplastic was produced through solvent casting by combining a blend of chitosan, a natural biopolymer, and polyvinyl alcohol (PVA), a synthetic polymer, to improve its mechanical and physical properties. CPS was extracted and then analyzed for yield, moisture, and starch content. The interactions among components in bioplastics were examined utilizing FTIR and SEM techniques. FTIR analysis revealed physical interactions devoid of chemical bonding, whereas SEM demonstrated heterogeneous surfaces characterized by cracks. Among the five formulations, the formulation containing 5.0 g of PVA and 1.5 g of chitosan (F5) exhibited optimal performance, characterized by a thickness of 0.25 mm, a tensile strength of 11.95%, an elongation of 17.83%, and a biodegradation rate of 49.16% after 12 days.  The material met JIS Z 1707:1997 standards for mechanical properties, although it did not fully comply with biodegradation requirements. The novelty of this research presents to the valorization of cassava peel starch as local-agro industrial waste into bioplastics enhanced with chitosan and PVA, revealing a cost-effective, renewable alternative that meets key mechanical standards while advancing sustainable plastic innovation. The results indicate that CPS-based bioplastics, when combined with suitable polymer matrices, offer a feasible and sustainable substitute for conventional plastics.
Co-Authors Alifah, Nur Fadhilatul Fitria Rahmitasari Halida Sophia Indri Susanti Kaffi, Raisha Aradea Muthmainah, Nada Ghaida Mutiara, Fadilah Nuraini, April Putri, Devi Anggraini Putri, Vindya Meinda Rizka Efi Mawli Robyano, Rifky Ardiansyah Setiawan, Grace Caroline Sholeha, Novia Amalia SRI FATMAWATI Sularsih, S Utiya Azizah Wahyuning, Baiq Nadia Risna Widyasri Prananingrum