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Sasri, Risya
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Determination of Total Tannin Content from Methanol Extracts of Various Species of Ferns (Pteridophyta) Hariyanti, Weni; Masriani, Masriani; Sasri, Risya; Sapar, Ajuk; Erlina, Erlina; Ersando, Ersando
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 2 (2024): April-May 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i2.11597

Abstract

AbstractThe use of heavy-metal mordants in fabric dyeing is prohibited due to the resulting impacts such as environmental damage and public health, therefore environmentally friendly and non-toxic mordants such as tannin mordants (biomordants) are needed. Based on phytochemical screening on fern species (Pteridophyta), it is known that they contain tannins. However, scientific evidence of determining the total tannin content of various species of ferns has so far not been found. This study aims to determine the yield and total tannin content of methanol extracts of five fern species, namely paku kawat (Lycopodium cernuum), paku resam (Gleichenia linearis), paku dayak (Blechnum orientale), paku uban (Nephrolepis biserrata), paku miding (Stenochlaena palustris). Sample extraction was carried out by maceration method using methanol solvent. Extract yield was determined by weighing method. Analysis of total tannin content was carried out by UV-Vis spectrophotometric method at a wavelength of 755.8 nm using Folin-Ciocalteu reagent and sodium carbonate. The results of the research obtained the yield of methanol extracts on paku kawat, paku resam, paku dayak, paku uban, and paku miding are 11.271%; 8.389%; 4.810%; 3.615%; and 0.854%, respectively. Total tannin levels in methanol extracts of paku kawat, paku resam, paku dayak, paku uban, and paku miding were 0.024% ± 0.002; 0.256% ± 0.029; 0.272% ± 0.037; 0.143% ± 0.019; and 0.022% ± 0.012, respectively. Based on these data, it can be concluded that the methanol extract of paku kawat produces the highest yield while paku dayak produce the highest total tannin content. The results indicate that differences in fern species cause differences in tannin levels.  
Determination of Tannin Content in Matoa Plants (Pometia pinnata) Based on Variations in Leaf Age Ulandari, Uci; Masriani, Masriani; Sasri, Risya; Ersando, Ersando
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12583

Abstract

The growth of the textile industry contributes significantly to environmental pollution from dye waste. The use of natural dyes from plants could be a solution to this problem, although they have weaknesses such as easy fading and less stable colors. Therefore, to improve color stability, a mordant is needed as a color fixative. Biomordants are mordants derived from plants that can be used as substitutes for metal mordants to bind dye to fabric fibers. Matoa leaves are one of the plants with the potential to be used as a biomordant because they contain tannin compounds. This study aims to determine the tannin content of methanol extracts of matoa leaf with various leaf age variations that can be used as a biomordant. The old and young matoa leaves were macerated with methanol for 3 days. The tannin content was determined using the Folin Ciocalteu method using a spectrophotometer Ultra Violet (UV) dual beam with positive control of tannic acid at a wavelength of 755.8 nm. The yield of methanol extract from old matoa leaves was 5.42% and from young matoa leaves was 8.58%. Phytochemical screening of methanol extract of old and young matoa leaves revealed the presence of secondary metabolite content of tannins, phenolics, flavonoids, saponins, triterpenoids, and alkaloids. The total tannin content of methanol extract from old matoa leaves was 0.37% ± 0.03, lower than that of young matoa leaves, which was 0.44% ± 0.06. Based on this research, it can be concluded that matoa leaves contain tannins and have the potential to be used as a biomordant.
Development of E-Supplement Flipbook Material Amino Acid Compounds from Tampoi Fruit (Baccaurea Macrocarpa) Hidayat, Niko; Masriani, Masriani; Sasri, Risya; Enawaty, Eny; Erlina, Erlina
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12958

Abstract

The purpose of this study was to determine the feasibility and response to E-Supplement Amino Acid in Tampoi Fruit (Baccaurea macrocarpa). This research method is research and development (R&D) with the ADDIE model consisting of analysis, design, development, implementation, and evaluation. The data collection technique in this study used measurement techniques with instruments, namely feasibility assessment sheets and response questionnaires. Data analysis used Guttman scale and average calculation. The feasibility of e-supplements was validated by two validators each. The results showed that the E-Supplement of Amino Acids in Tampoi Fruit (Baccaurea macrocarpa) has a feasibility level in the aspects of material, media, and language, which is very feasible (k = 100%). The average percentage of student responses to e-supplements is 90.94% with a very feasible category. So E-Supplement Amino Acids in Tampoi Fruit (Baccaurea macrocarpa) is very feasible to use and get a very good response from students.
Development of Interactive Multimedia on Electron Configuration Concept Dzikrika*, Nuuridzdzati; Junanto, Tulus; Erlina, Erlina; Enawaty, Eny; Sasri, Risya; Rasmawan, Rahmat; Nizam, Dinna Nina Mohd
Jurnal Pendidikan Sains Indonesia Vol 12, No 2 (2024): APRIL 2024
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jpsi.v12i2.36061

Abstract

Interactive multimedia has an important role in the learning process. The interactive multimedia presented the learning material in various forms and supported students understanding of those who have different learning styles. To help students understand the topic and to facilitate students learning style the PeT-EFig is developed. PeT-EFig (periodic table and electron configuration) as interactive multimedia which supported students understanding of electron configuration concepts. The objectives of this study were a) to determine the feasibility of PeT-EFig, and b) to determine the response of chemistry teachers and students of PeT-EFig as interactive multimedia. The research method used is research and development (RD) using the ADDIE model with five stages: analysis, design, and development stages. However, the research was only conducted up to the development stage due to time constraints. Based on the result, PeT-EFig is considered very suitable by the experts with 96 and 95% respectively. Likewise, teachers at SMA Muhammadiyah 1 Pontianak who teach chemistry subjects, stated that they strongly approved PeT-EFig as interactive multimedia on electron configuration 96%. Additionally, students also provided very positive feedback on the PeT-EFig through a small-scale trial involving 15 students with an average percentage of 87% for each aspect. Similarly, when a large-scale trial with 40 students, the final percentage score for each aspect was found to be 87%. The result indicated that the PeT-EFig could assist teachers in delivering the concepts and help students understand the electron configuration and atomic structure
Synthesis and Characterization of Hematite (α-Fe₂O₃) Nanomaterials from Red Mud Using EDTA as Capping Agent Sitorus, Berlian; Manulang, Yunior Arta Arga; Sasri, Risya; Panjaitan, Seno D.
Jurnal Kimia Sains dan Aplikasi Vol 28, No 8 (2025): Volume 28 Issue 8 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.8.463-470

Abstract

Hematite (α-Fe2O3) nanomaterials, a stable phase of iron oxide, hold significant potential for diverse materials science and technology applications. In this study, red mud was employed as a low-cost precursor for synthesizing hematite nanomaterials, with ethylenediaminetetraacetic acid (EDTA) used as a capping agent to prevent particle agglomeration. The effect of EDTA on particle size and colloidal stability was investigated by comparing three synthesis variations: (a) without EDTA (NPH-1), (b) with EDTA via the precipitation method (NPH-2), and (c) with EDTA via the hydrothermal method (NPH-3). XRD analysis confirmed the formation of crystalline hematite (α-Fe2O3) in all samples. FT-IR spectroscopy revealed absorption bands at 1624 cm−1 and 1382 cm−1, corresponding to the symmetric and asymmetric stretching vibrations of the carboxylate (COO−) group, respectively. The difference in these wavenumbers suggests monodentate coordination between the carboxyl groups of EDTA and the hematite nanoparticle surfaces. Particle size analysis indicated that the EDTA-assisted synthesis via precipitation (NPH-2) produced the smallest average particle size (149.6 nm) with a narrow size distribution, as reflected by a polydispersity index (PDI) of 0.43. Furthermore, this sample demonstrated enhanced colloidal stability with a zeta potential of −34.0 mV. These findings suggest that the synthesized α-Fe2O3 nanomaterials produced with narrow particle size distribution and high colloidal stability, are promising for visible-light photocatalysis.
Development of SAVI-Based Basic Chemical Law E -Module Juwita, Syita Auliah; Enawaty, Eny; Sasri, Risya
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 5 (2025): October 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i5.15124

Abstract

AbstractThe purpose of this study was to determine the validity of the SAVI-based basic chemical law e-module and to determine students' responses to the SAVI-based basic chemical law e-module. This study was conducted at SMA Negeri 5 Pontianak, Class XI Chemistry Major. This type of research is Research & Development (R&D), using the ADDIE development model (analysis, design, development, implementation, evaluation) with limitations on the development stage. The results of the study indicate that the developed SAVI-based basic chemical law e-module is included in the very feasible and feasible category with validation results from material experts of 97% (Very Valid), validation from language experts of 100% (Very Valid), validation from media experts of 96.13% (Very Valid), the results of the limited response test conducted by 12 students in class XI Chemistry majoring in three assessment aspects are categorized as very good with details of the module display aspect of 93.75% (Very Good), the material presentation aspect of 93.22% (Very Good), and the benefit aspect of 93.22% (Very Good), and the results of the extensive response test conducted by 24 students in class XI Chemistry majoring in the module display aspect showed a score of 93% (Very Good), the material presentation aspect of 93.48%, and the benefit aspect of 94.53% (Very Good). This shows that the SAVI-based basic chemical law e-module is very feasible to use in the learning process.
Co-Authors Agusta, Muhammad Farras Leonasa Ajuk Sapar Berlian Sitorus Cahyani, Melur Regista Diannisa, Nyemas Firda Dzikrika*, Nuuridzdzati Eni Mayasari Eny Enawaty Erlina Erlina Ersando, Ersando Fitri, Sari Nur Hariyanti, Weni Harun, Andi Ifriany Harun, Ifriany Hidayat, Niko Ifriani, Andi Ifriany, Andi Ira Lestari Juwita, Syita Auliah Manulang, Yunior Arta Arga Maria Ulfah Masriani . Maulidiyah, Hanna Rohmatul Milawati, Sri Monica, Icha Monica, Qois Nizam, Dinna Nina Mohd Parawansa, Khofifah Aditha Rachmat Sahputra Rahmat Rasmawan Rini Muharini Rody Putra Sartika Sembiring, Rinawati Seno Darmawan Panjaitan Sri Wahyuni Sumila, Sumila Syahbanu, Intan Tulus Junanto Ulandari, Uci Warohmah, Mawaddatul WILDA, WILDA Yunita Puspasari, Yunita