bluuebunny/crossref_metadata_2025 huggingface dataset:
Proporsi Tape Singkong (Manihot esculenta) dan Ekstrak Pakcoy (Brassica rapa) yang Berbeda Terhadap Mutu Kimia dan Organoleptik Jus
Authors: Hanandhina Rana , Hartati Fadjar Kurnia , Sucahyo Bambang Sigit
Published: January 2025

Avocado juice is one of the most popular preparations in the community, but avocado fruit is seasonal so that when it is not in season it becomes difficult to obtain or even unavailable, so it is necessary to seek alternative juices with flavors similar to avocado juice. One alternative is juice made from a mixture of cassava tape and pakcoy leaves. This study aims to determine how the proportion of cassava tape and pakcoy affects the chemical and organoleptic quality of the resulting product, and to determine the most optimal proportion to produce the best juice product similar to avocado juice. This study used a quantitative experimental laboratory method with a research design using a Completely Randomized Design with four treatments and three repetitions. Chemical test parameters include reducing sugar reduction with luff-schrool test method, crude fiber with gravimetric test method, vitamin C with iodimetry test. The organoleptic test (taste, aroma, and color) using 25 panelists. Data analysis used Duncan test for lab test results and Kruskal Wallis for organoleptic test. The results showed that (1) the proportion of cassava and pakcoy tape had a significant effect on reducing sugar content, fiber content, and vitamin C content. (2) Reducing sugar content, fiber content, and vitamin C content in cassava and pakcoy tape juice were higher than avocado juice. (3) Organoleptic test showed the best value in treatment J3 in the aspects of taste and color, and treatment J0 in the aspect of aroma. (4) The effectiveness test showed that treatment J3 had the highest value which was the best treatment of this study.
Ekstraksi Gelatin Dari Tulang Ikan Layah Secara Asam Sebagai Alternatif Gelatin Halal
Authors: Kurnia Nova , Rohmatillah Laila Mardiana , Ilyas M.Ali , Muhazam Muhazam , Sumarlin Muhamad , Fatinah Fenny Inas
Published: January 2025

Gelatin is a food additive that is widely used in the food, medicine and cosmetics industries. However, the source of gelatin is not only the bones and skin of halal animals such as cows and goats, but can also come from pigs. To fulfill the need for halal gelatin, it is absolutely necessary to search for other sources of halal gelatin, one of which is sea fish. This study aims to extract gelatin from the bones of sailfish as an alternative source of halal gelatin. The extraction process was carried out using an acid method, where fish bones were soaked in 3% acetic acid (1:10 w/v) for 48 hours. The resulting ossein was then washed with diluted NaOH and distilled water until the pH reached 6–7. The ossein was heated at a temperature of 80°C for 3 hours to obtain a gelatin solution. The gelatin solution was then cooled, producing a gel-like gelatin preparation with a yellowish-white color. The gelatin gel was subsequently dried in a furnace at a temperature of 40–50°C for 60 minutes. The final gelatin product was a yellow-colored powder.
Pengaruh Konsentrasi Sodium Alginat Terhadap Boba Kulit Buah Naga (Hylocereus Polyhizus) Menggunakan Teknik Spherifikasi Dasar
Authors: Ningrum Cicik Agustia , Yuniati Yuyun , Sucahyo Bambang Sigit
Published: January 2025

Usually, dragon fruit is only used for the flesh while the skin is discarded and considered waste. Dragon fruit peel contains vitamin C, vitamin E, vitamin A, alkaloids, terpenoids, flavonoids, thiamine niacin, pyridoxine, cobalamin, phenolics, carotene and phytoalbumin. 30-35% of dragon fruit is the skin of the fruit but it is often just thrown away as trash. Dragon fruit skin contains quite a lot of the natural dye anthocyanin. This research aims to determine the effect of pH, water content, vitamin C, and organoleptics on the of dragon fruit skin boba using the basic spherificatiom technique. This research used laboratory experimental methods using a completely randomized design (CRD) with varying concentrations of sodium alginate (1gr,1,1gr,1,2gr,1,3gr, dan 1,4gr) calcium lactate (5 grams) for each treatment. This was repeated 3 times, the analyzes tested in this study were pH, viscosity and organoleptic tests. The parametric data obtained were analyzed using analysis of variance (ANOVA) using statistical product and service solution (SPSS) version 23 data and for non-parametric data using Kruskal Wallis.
Evaluasi Kemampuan Literasi Biodiversitas Mahasiswa
Authors: Fajri Siti Rabiatul , Citrawathi Desak Made , Adnyana Putu Budi , Arnyana Ida Bagus Putu
Published: January 2025

Indonesia is one of the countries with the highest biodiversity in the world. However, this high diversity requires individual awareness and responsibility to maintain and utilize it sustainably. Therefore, biodiversity literacy is an important element, especially for students as prospective future generations who will play a role in natural resource management in the future. This study aims to evaluate the level of biodiversity literacy of students of the Biology study program at the University of Education Mandalika, by assessing six dimensions of biodiversity literacy: Conservation and Importance of Biodiversity (CIB), Ethics and Biodiversity (EB), Sustainability and Biodiversity (SB), Taking Action to Protect Biodiversity (TAPB), Biodiversity and Utility (BU), and Conservation and Importance of Species (CIS).  The method used was quantitative descriptive, involving 50 students as respondents. The instrument used consisted of 27 items that were analyzed using One Way ANOVA to determine the average score and significant differences based on gender and student scores. The results showed that the average score of biodiversity literacy obtained a score of 2.08 with a less significant category (Low Biodiversity Literacy). Most of the indicators are at an average value below 2.50, only a small number of indicators have an average value above 2.50. In the CIB dimension, only 3 indicators have an average value of > 2.50 out of 5 indicators. In the TAPB dimension, only 1 indicator has an average > 2.50. While in other dimensions, the average value < 2.50. In addition, there was no significant difference in student scores based on gender. Thus, student biodiversity literacy still needs to be improved, especially in the aspects of real action and individual responsibility.
Exploring Integrated Instrument Complement at Practical Approach at MAN 4 Tanah Datar
Authors: Mutia Ulfa , Mawarnis Elvy Rahmi
Published: January 2025

The purpose of this research is to produce Integrated Instrument Components. Exploring integrated instrument complement at practical approach at MAN 4 Tanah Datar which is valid and practical. This study uses the Research and Development research method with the 4-D development model (define, design, develop, and disseminate). But the stages in research with this 4-D model are only carried out from the first to the third stage, namely the define stage to get conditions in the field. design stage to prepare a simple practicum kit on Thermochemistry material, and the develop stage to get the results of the initial practicum IIC that has been designed followed by validity and practicality tests. The research instruments used were validation sheets and response questionnaire sheets. The validation sheet was filled in by 2 lecturers and 1 chemistry educator. The response questionnaire sheet was filled by 17 of in 11th grade students of MAN 4 Tanah Datar. The results showed that: 1) Simple Practical IIC on Thermochemical Material has met the valid criteria with 92% validation results, 2) Simple Practical IIC on Thermochemical Material has met the practical criteria with the results of the student response questionnaire.
Clean Water Quality Analysis based on Chemical Parameters at the Taha Qur'an Education Park Bima Regency
Authors: Azwaruddin Azwaruddin , Abdullah Taufik , Wahyuningsih Sri
Published: January 2025

Unclean water is the cause of skin diseases. Skin diseases are included in water washed diseases which are influenced by the environment and human behavior. The water source at the Taha Qur'an Education Park is a drilled well, this water source is close to the residents' livestock pens which can be a source of pollution. The aim of the research is to determine the quality of clean water in the Taha Qur'an Education Park. Type of qualitative descriptive research. The population in this study was all the water taps in the Taha Qur'an Education Park. The number of samples was 2 samples. Based on Minister of Health Regulation number 32 of 2017, the results of water chemistry quality tests from the results of pH measurements on samples from Tap A were 7.5 and on samples from Tap B were 7.5, which is based on Regulation of the Minister of Health of the Republic of Indonesia Number 32 of 2017. Quality standard values for pH it is 6.5-8.5, while for checking Detergent levels in clean water the results obtained for tap A samples are 0.03 Mg/L and for Tap B samples it is 0.02 Mg/L, which is based on the Minister of Health Regulation Republic of Indonesia Number 32 of 2017 The quality standard value for Detergents is 0.05 Mg/L. It is hoped that the management of the Taha Qur'an Education Park will continue to maintain the quality of clean water in the Taha Qur'an Education Park, Bima Regency.
Investigating the Meaningful Learning in Chemical Separation Practicums: A Quantitative Approach
Authors: Amat Amat , Erlina Erlina , Ira Lestari Ira Lestari , Masriani Masriani , Maria Ulfah Maria Ulfah
Published: January 2025

Meaningful learning has an important element that is finding advantages in obtaining various information comprehensively, thereby ultimately improving learner’s abilities. This aspect can provide information to understand and enhance meaningful learning. The purpose of this research is to analyze meaningful learning in the chemical separation practicum for the Chemistry Education students at FKIP UNTAN. The type of research used is quantitative descriptive with a survey method. Data collection tools in this analysis are questionnaires and interview guidelines. The questionnaires and interviews were administered after the practicum was completed. The number of students for the questionnaire was 59 people consisting of 26 people who were interviewed, including course instructors, laboratory heads, laboratory assistants, and student representatives from classes A1, A2, A3. The research results, in terms of the affective aspect, were 64% in the good category. In terms of the cognitive aspect, a percentage of 73% was achieved in the good category, while the affective-cognitive aspect had a percentage of 66% in the good category. Based on the data obtained, it can be concluded that learning in this chemical separation practicum is meaningful.
Development of Cooperative Learning-Based Student Worksheets (LKPD) on Chemical Nomenclature Subject Material for 10th Grade Students
Authors: Septiana Tri Merry , Sartika Rody Putra , Rasmawan Rahmat
Published: January 2025

AbstractResearch has been done to develop a product in the form of student worksheets chemical compounds for SMA/MA grade X. This research aims to develop students ' worksheets of material nomenclature for SMA/MA grade X, knowing the quality of teaching materials based on expert test (expert judgement), knowing student response, and knowing the implementation of learning process. This research and development (R&D) is conducted based on 4-D models that are limited to the develop stage. The subject of this study is the LKPD based on cooperative learning in compound nomenclature. The product is in the quality of one chemical teacher, one Indonesian teacher, and two chemistry lecturers. Based on the results of the expert quality assessment, the LKPD based cooperative learning in compound name matter got very good/very high category with a percentage of 84.27% worth using as a teaching material in the learning process. Keywords: LKPD, Cooperative Learning, feasibility of the product
Validity Test of E-LKPD to Improve Students' Argumentation Skills on Chemical Equilibrium Material
Authors: Andreani Lucky Arthamevia , Yonata Bertha
Published: January 2025

Dalam bidang pendidikan kimia, peserta didik diharapkan dapat mengembangkan keterampilannya sesuai dengan keterampilan yang dibutuhkan pada abad ke-21. Salah satu kompetensi kerangka 4C adalah berpikir kritis dan keterampilan komunikasi. Kedua kompetensi ini dikemas menjadi satu kesatuan dalam keterampilan argumentasi. Keterampilan argumentasi berperan dalam melatih siswa mengembangkan kemampuan berpikirnya sehingga meningkatkan pemahamannya. Tujuan penelitian ini adalah mengembangkan e-LKPD yang valid untuk meningkatkan kemampuan argumentasi siswa dalam konteks kesetimbangan kimia. Metodologi penelitian yang digunakan dalam penelitian ini adalah Research and Development (R&D) dengan menggunakan model pengembangan 4D yang dikemukakan oleh Thiagarajan, yang meliputi tahapan sebagai berikut: pendefinisian, perancangan, pengembangan, dan penyebaran. Namun penelitian ini hanya sebatas tahap pengembangan dengan uji coba terbatas untuk mengetahui kelayakan produk. Keterbatasan ini didasarkan pada beberapa pertimbangan antara lain waktu, tenaga, dan kendala. Validasi dilakukan oleh tiga orang validator yang terdiri dari dua orang dosen program studi pendidikan kimia dan satu orang guru mata pelajaran kimia. Skor validitas yang dihasilkan kemudian dianalisis menggunakan metode mode. Hasil penelitian menunjukkan bahwa E-LKPD valid ditinjau dari validitas isi. Nilai modus untuk kategori ini adalah 5 yang menunjukkan hasil yang sangat valid
Development Of Teaching Material To Support Merdeka Curriculum On Stoichiometry For Phase F
Authors: Damiyanti Damiyanti , Mawardi Mawardi , Suryani Okta
Published: January 2025

This study aims to develop teaching materials to support merdeka curriculum learning on stoichiometry material phase F SMA / MA. This research uses the Eduactional Design Research (EDR) method with the Plomp development model which consists of three stages, namely the preliminary research stage, the development or prototyping phase, and the trial and assessment phase. Data collection was carried out using validity and practicality questionnaires. The subjects of this study were three chemistry lecturers, two chemistry teachers and nine students with high, medium and low ability levels. The validity questionnaire was given to three chemistry lecturers and two chemistry teachers while the practicality questionnaire was given to two chemistry teachers and nine students. The results showed that the validity test obtained a validity value of 88% which was declared a valid category. While the results of the practicality test for chemistry teachers obtained a value of 91% which was declared a very practical category and the results for students obtained a value of 93% which was declared a very practical category. Based on the results of the study, it was found that the development of teaching materials to support merdeka curriculum learning in SMA/MA phase F stoichiometry material was valid and practical
Characterization of Activated Charcoal Produced Using Green Chemistry Principle Approach Number 7
Authors: Thohir Muhammad Bakhru , Wijaya Terry Esi Putri
Published: January 2025

Charcoal is an important component in the effort to provide clean water. One of the water qualities that need to be considered is the level of hardness. Reducing the level of hardness can be done with activated charcoal. The production of activated charcoal uses many synthetic materials. Therefore, aim of research is to produce, test the performance, and characterization of activated charcoal made with natural acids. The stages of this research are charcoal preparation and natural acid activator, carbonization, activation with natural acids (Averrhoa bilimbi L. and Citrus aurantifolia S.), and characterization. The production results were tested for adsorbing ability and characterization using FTIR, SEM, and XRD to determine the functional groups, structure, and components. The results showed that activated charcoal produced using natural acids had better performance in adsorbing. Characterization with FTIR showed the absorption of C-H functional groups shown at 785 cm-1, 1100 cm-1 for C-O functional groups, 3368 cm-1 for O-H stretching vibration groups. Typical active charcoal groups were also detected at wave numbers 1704 cm-1for C=O functional groups and 1575 cm-1 for C=C groups. Characterization with XRD showed the same pattern between charcoal produced with natural acids and the control. SEM images showed clear pores on the surface of the activated charcoal. Thus, natural acids can really be a candidate for activator replacement in the production of activated charcoal that applies the principles of green chemistry.
Reducing Coffee Acidity and Caffeine through the Roasting Method using Azadirachtaindica Firewood
Authors: Putera Dwi , Yamin Yamin , Firdaus Thoriqi
Published: January 2025

Coffee is known as an acidic drink, so it will make the stomach feel unpleasant. This research compares the roasting method with Azadirachta Indica firewood with machine and manual roasting processes. Each roasting method uses four maturity levels: light roast, medium roast, dark roast, and extra dark roast. The acidity test used a pH meter instrument, and the caffeine test used the spectrophotometric method, which was carried out at the Sucofindo Indonesia laboratory. The one-way ANOVA test analyzed each method's acidity and caffeine results statistically. It can be seen that the sig < 0.05 in one-way ANOVA results for pH (0.006) and caffeine (0.013) coffee tests. So, there are significant differences in the three coffee roasting methods in reducing acidity and caffeine levels at each coffee roasting level. The average results of coffee acidity using the Azadirachta Indica wood roasting method (5.6), machine roasting (5.1), and manual roasting (4.8). The average yield of coffee caffeine with the Azadirachta Indica wood roasting method (2.13), machine roasting (2.55), and manual roasting (2.90). The roasting way using Azadirachta Indica firewood is the most effective, and there is a significant difference in reducing the acidity and caffeine of coffee at each level of coffee roasting. 55), and manual roasting (2.90). The most effective method of roasting is with Azadirachta Indica firewood, and there are significant differences in reducing the acidity and caffeine of coffee at each coffee roasting level. 55), and manual roasting (2.90). The most effective method of roasting is with Azadirachta Indica firewood, and there are significant differences in reducing the acidity and caffeine of coffee at each coffee roasting level.
Development Problem-BasedLearning Oriented E-worksheet To Train Analytical Skills On Chemical Equilibrium Material
Authors: Damayanti Vivi , Novita Dian
Published: January 2025

The purpose of this study is to discuss the possibility of using a problem-based learning-oriented e-worksheet to teach students analytical skills on chemical equilibrium material. The feasibility of E-LKPD may be assessed in terms of validity, practicality, and efficacy. The approach employed in this study is Research and Development (R&D), utilizing the 4D development process derived by Tiagharajan, which covers Define, Design, Develop, and Disseminate. Based on the findings of the research, the e-worksheet earned mode 3 on the validation sheet, indicating that it is legitimate. The e-worksheet was deemed extremely practical based on the findings of the student response questionnaire, with a percentage of 86.44%. The e-worksheet is certified effective in terms of analyzing t test findings with a significance value of 0.00, implying that Ho is rejected and Ha is accepted. The n-gain score for analytical skills was 0.55 on element analysis, 0.59 on relationship analysis, and 0.59 on organizing analysis. Based on these findings, it is possible to infer that the problem-based learning-oriented e-worksheet produced to educate students' analytical abilities on chemical equilibrium content is suitable for usage.
Exploration of Student Thinking Systems Through STEM-PjBL Project Based Learning in the Science Field
Authors: Sukarma I Ketut , Hulyadi Hulyadi , Muhali Muhali , Azmi Irham
Published: January 2025

The complexity of science concepts which are interrelated with each other requires the competence to think systematically. Complex thinking which is the basis for critical, analytical, creative and metacognitive thinking is very important to master in responding to the challenges of the 21st century. The aim of this research is to explore students' thinking systems taught using the STEM-PjBL model. This research is quantitative descriptive research. The variables studied are students' thinking systems based on the ability to determine components that influence each other in the bioethanol synthesis and dehydrator processes. The population in the study was 17 students. Students are distributed in two semesters, namely semesters II and IV. The research uses pre-test and post-test systematic thinking ability tests as data collection techniques and tools. The test consists of 5 essay questions that assess students' systematic thinking competence, and the test used is analyzed for validity, discrimination power, and level of difficulty before use. This test was developed based on indicators of systematic thinking competency. Tests were given to students before and after carrying out project activities for making and dehydrating bioethanol. After carrying out the project, students strengthen their competence through computational simulations related to the project being carried out. The data obtained is then presented in a communicative graph. The research results showed that 35.2% had high system thinking, 29% medium, 35.6% low. These results show that the application of the STEM-PjBL model is able to foster students' systematic thinking competency.
The Effectiveness of Interactive E-Modules as Learning Media to Train Visual Spatial Intelligence in Chemical Bond Material
Authors: Fatmawati Ria , Sukarmin Sukarmin
Published: January 2025

This study aims to determine the effectiveness of interactive e-module that train students' visual intelligence on chemical bond material. Chemical bond is one of the high school chemistry materials that has basic concepts that must be mastered in order to understand other chemistry topics and abstracts require the ability to understand what must be stimulated. This study was compiled based on the 4D research and development (R&D) model. The subjects and population of this study were students of class XI IPA at SMAN 12 Surabaya. The effectiveness of the review of cognitive domain tests and spatial visual intelligence tests before and after the use of a 3D visualialization base interactive e-module. The analysis of this study used N-gain and normality statistical tests until the data were normally distributed. The effectiveness of the media was stated to be very effective with an N-Gain score on the cognitive test of 0.8 in the high category and the spatial visual intelligence test of 0.8 in the high category which shows the relationship between cognitive domain tests and visual spatial tests can improve understanding of chemical bond material. The results of the research show that it is feasible to implement
Development of Merdeka Curriculum Teaching Module Based on Problem Based Learning Acid-Base Material
Authors: Lusianti Lusianti , Enawaty Eny , Ulfah Maria , Hairida Hairida , Erlina Erlina
Published: January 2025

Teachers experience difficulties in designing teaching modules in the independent curriculum and teachers need differentiated teaching modules. This research aims to develop an Merdeka Curriculum Teaching Module Based on Problem Based Learning on Acid and Base Material and determine the feasibility of the teaching module and the teacher's response to the teaching module. The research method used is Research and Development (R&D) with the ADDIE model limited to the development stage. The subject of this research is the Independent Curriculum teaching module based on Problem Based Learning on acid base material. The research instrument used was a questionnaire. This questionnaire is used to validate the product and test teacher responses using a Likert scale. The data collection technique used was indirect communication techniques by providing questionnaires. Data from product validation results were analyzed using Gregory with validation results from the material aspect of 1 and the media aspect of 1 with the high validity category. Then a trial was carried out with a response test carried out on 2 chemistry teachers. The teacher response test results obtained a percentage of 100%. This shows that the Merdeka Curriculum teaching module based on problem-based learning on acid-base material meets appropriate for use as a teaching tool.
Eco-Dyeing of Timor Woven Fabrics using Pterocarpus Indicus Bark Tannin as a Natural Mordant
Authors: Adu Risna Erni Yati , Fay Angela Desy Putry , Tea Marselina Theresia Djue
Published: January 2025

Pterocarpus indicus is a tropical wood type containing tannin compounds which potentially to be used as biomordants in woven fabrics dyeing. This research is the first work to determine the color cha racteristics of Timorese woven fabric after using tannin from Pterocarpus indicus bark as a biomordant. This research aims to determine the tannin content and colour properties of Timor woven fabric after using tannin as a a natural mordant. Pterocarpus indicus bark samples were prepared and extracted via hot extraction. The tannins in Pterocarpus indicus stem bark were qualitatively and quantitatively analyzed using FT-IR and UV-Vis Spectrophotometer respectively, then applied as a color binder for woven threads. The color properties of woven fabrics with tannin were compared to woven fabrics treated with Al2(SO4)3 mordant at a concentration of 15%. Color fastness to washing are tested using the Staining Scale Standard. Pterocarpus indicus bark tannin is a brown powder. Qualitative and quantitative tests show that Pterocarpus indicus bark contains tannins with a total concentration of 0.0436%. FTIR spectra exhibited functional groups absorption by the aromatic C-H, O-H, C=C, C-C, C-O-C, and C-O. The use of 15% tannin and curcumin dye produces a yellow-brown woven fabric with a fairly good color fastness value to washing. Pterocarpus indicus bark contains tannin which has potential as a biomordant for natural Timorese weaving dyeing.
Student Worksheet (LKPD) Development Based on Local Wisdom in the Making of Teak Leaf Extract as a Natural Indicator of Acid-Base
Authors: Mukhtar Raine Ramdhanya , Hairida Hairida , Enawati Eny , Masriani Masriani , Erlina Erlina
Published: January 2025

This study aims to determine the level of feasibility and response of teachers to the development of student worksheets (LKPD) based on local wisdom on the use of teak leaves as a natural indicator of acid-base acid. This research method is Research and development (R&D) or a development method with the ADDIE research model which consists of analysis, design, development and evaluation. The subject of this research is LKPD which is validated by 2 experts in the fields of materials and graphics and linguistics. This study was also to determine the responses of 5 chemistry teachers from Alor district, East Nusa Tengggara and Singkawang city, West Kalimantan by using data collection instruments in the form of validation sheets and teacher response questionnaires with indirect communication data collection techniques. The results of data processing showed that LKPD products based on local wisdom had a validity level of 83.12% and the results of the educator response test of 97.5% with each category very feasible.
Application of Problem-Based Worksheets to Develop Higher Order Thinking Skills In The Utilization of Coconut Shells As Zn Metal Adsorbent In Laboratory Waste
Authors: Lestari Risma , Sukmawardani Yulia , Subarkah Cucu Zaenab , Farida Ida
Published: January 2025

This study aims to analyze scientific performance and analyze students' higher-order thinking skills after the application of problem-based LK to develop higher-order thinking skills in the use of coconut shell as an adsorbent for Zn metal in laboratory wastewater. The research method used is pre-experiment with one shot case study design. The subjects in this study were chemistry education students of UIN Sunan Gunung Djati Bandung who took separation chemistry courses. The instruments used are learning descriptions, LK, and higher order thinking skills questions. Students' higher-order thinking skills are measured through working on six HOTS questions based on the concept of Bloom's taxonomy level of thinking at cognitive levels C4 (analyze), C5 (Evaluate) and C6 (Create). The results showed that the average value of student performance in solving problem-based LK was 88.35 with a very good category. The highest average score achieved was at stage 2 organizing students with a score of 91.5 and a very good category. The lowest average value at stage 4 develops and presents results with a value of 86.25 and a very good category. The results of students' higher order thinking skills obtained an average score of 78 in the good category. Thus the application of problem-based LK on the utilization of coconut shell as a heavy metal adsorbent in laboratory wastewater can develop higher order thinking skills in students.
Determination of Tannin Content in Matoa Plants (Pometia pinnata) Based on Variations in Leaf Age
Authors: Ulandari Uci , Masriani Masriani , Sasri Risya , Ersando Ersando
Published: January 2025

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.
Science Teachers' Perceptions The Merdeka Curriculum Implementation In Entikong Border State Junior High Schools
Authors: Kusudaryani Praditya Adi , Hairida Hairida , Masriani Masriani
Published: January 2025

Merdeka Curriculum emphasises the implementation of differentiated learning and considers the unique characteristics of each student. Teachers have an important role in the development and implementation of this curriculum, and must have interpretations in accordance with the provisions of curriculum development. Teachers' perceptions of the Merdeka Curriculum are very diverse and can significantly affect the readiness and quality of learning to be carried out. This study aims to determine teacher perceptions based on aspects of cognition, affection, conation. This research uses a qualitative descriptive method with data collection techniques using questionnaires, in-depth interviews, and documentation. The research questionnaire used is an open question that has been validated for content by 3 Merdeka Curriculum experts and validated for items by Merdeka Curriculum experts and Educational Psychology Experts. The results showed that teachers' perceptions are very important in implementing the Merdeka Curriculum, cognition about general concepts is positive, but for in-depth concepts, teachers' perceptions are negative. Schools that provide gradual training have succeeded in building teachers' positive cognition, although many still think that teaching modules are the same as lesson plans from the 2013 Curriculum. Teachers support the development of Merdeka Curriculum even though they feel there are limitations in understanding and readiness of infrastructure in schools. Teachers are also positive about the support and cooperation between teachers, especially through MGMP, but still feel that they are not fully capable of making their own learning tools. Although the teaching modules are in accordance with the provisions, teachers have not fully implemented differentiation plans or utilised the results of learning style diagnosis in learning.
Development of Student Worksheets based Assessment for Learning on Chemical Equilibrium to Improve Student Science Process Skills
Authors: Utami Dianita Fitri , Agustini Rudiana
Published: January 2025

This study focuses on creating Student Worksheets (LKPD) that incorporate Assessment for Learning principles to improve students' scientific process skills in chemical equilibrium. The research employs the ADDIE (Analysis, Design, Development, Implementation, Evaluation) model of Research and Development (R&D). The study evaluates the LKPD's effectiveness, practicality, and validity. A one-sample t-test comparing pretest and posttest scores measures effectiveness. Practicality is determined through quantitative descriptive analysis of student feedback questionnaires and activity observation sheets. Validity assessment involves both qualitative and quantitative descriptive analysis using Likert scale validation forms. Results show that the developed LKPD achieved the highest possible validity score (mode of 5) across all aspects. It demonstrated 90.7% practicality and a statistically significant t-test result (p-value of 0.000). These outcomes suggest that the LKPD effectively enhances students' scientific process skills in chemical equilibrium studies. The Assessment for Learning approach and integrated feedback in the LKPD promote active student engagement and foster improved scientific process skills in this subject area.
Comparison of Ethanol Levels in Yellow and Red Watermelon Wine
Authors: Tan Andreas Felix , Manao Mutiara Angelina , Delviyanti Maria Novia , Honesty Pricillia Pretty Septy , Hapsari Natalia Diyah
Published: January 2025

Watermelon is one of the tropical fruits that has high water and sugar content. However, the selling price of watermelon is still relatively low, and there is limited processing variation. By utilizing the high water and sugar content in watermelon to create an alcoholic beverage, wine is one promising form of innovation. The aim of this research is to determine the difference in alcohol content of wine made from yellow and red watermelon. The samples used in this study were yellow and red watermelons. Yellow and red watermelons fermented with Saccharomyces cerevisiae yeast to transform them into wine. The ethanol content in wine and red watermelons was analyzed using GC-MS instruments. Subsequently, the soluble sugar content, pH, IR spectra, as well as the color, taste, and aroma of the wine also analyzed. The research results show that the average ethanol content of yellow and red watermelon wines is 7.59% and 6.61% respectively. The average soluble sugar content in yellow and red watermelon wines is 8.6% Brix and 12.64% Brix, respectively. The pH value of each wine sample is 4, and the IR spectra of each wine sample indicate the presence of stretching OH groups. In conclusion, red watermelon wine has a lower ethanol content than yellow watermelon wine.
Development of Chemistry Edutainment Learning Media to Enhance Students Retention
Authors: Nisa Chairun , Kurniasih Dedeh , Hadiarti Dini , Kurniati Tuti
Published: January 2025

The teaching media that a teacher uses can have an impact on the comprehension and memory of the students. Chemical bonding material is one of the learning resources that educators are encouraged to employ to assist and promote more creative, engaging, and enjoyable learning experiences. Chemistry Edutainment media is one type of educational resource that can be employed. This study attempts to characterize student learning retention following chemistry lessons using chemistry edutainment on chemical bond material for class X MAN 3 Pontianak, as well as to ascertain the validity, practicality, and efficacy of chemistry edutainment media. The methods of measurement, observation, and interviewing are employed in the data collection process. Student learning outcomes assessments, observation sheets, and interview sheets were the instruments utilized to collect the data. The study employs the ADDIE method, yielding validation rates of 93.3% for the material aspect and 90.6% for the media aspect. These percentages denote a high level of validity. The practicality percentages, derived from the initial and main field trial questionnaire responses, are 87.17% and 94.03%, respectively, indicating a high degree of practicality. Moreover, the effectiveness analysis, based on the learning outcomes following the use of Chemistry Edutainment media, resulted in N-Gain scores of 0.92 and 0.71 for the initial and main field trials, respectively, meeting the high effectiveness criteria. The retention percentages obtained in the initial and main field trials are 75% and 89.97%, respectively, which meet the high retention criteria.
Antioxidant Activity of Hydnophytum formicarum Extract by TEAC method (Trolox Equivalent Antioxidant Capacity Assay)
Authors: Purnamasari Mayshah
Published: January 2025

Oxidative stress, caused by excess reactive oxygen species (ROS), is believed to be a major contributor to aging and various degenerative diseases. Plant-based antioxidants have gained significant attention for their potential in combating R.O.S. Hydnophytum formicarum, traditionally used to treat diabetes, is evaluated as a natural antioxidant source. This study is the first to assess the antioxidant activity of H. formicarum tuber ethanol extract using the TEAC method, revealing a high antioxidant capacity (220.38 ± 0.61 M TE/100 g), highlighting its potential as a dietary supplement.
Designing POGIL Based Student Worksheets for Buffer Solution Learning at SMAN 2 Sawahlunto
Authors: Wanti Sri , Mawarnis Elvy Rahmi , Herman Mimi
Published: January 2025

The purpose of this study was to produce a valid and practical Process Oriented Guided Inquiry Learning (POGIL)-based Student Worksheet (LKPD) on 11th Grade Class Buffer Solution Material at State Senior High School (SMAN) 2 Sawahlunto. This research uses the Research and Development research method with the 4-D development model (define, design, develop, and disseminate). However, the stages in research with this 4-D model are only carried out from the first to the third stage, namely the define stage aims to get an overview of field conditions, the design stage aims to compile and design POGIL-based Student Worksheets (LKPD) on buffer solution material, and the develop stage aims to continue the POGIL-based LKPD on buffer solution material that has been designed with validity and practicality tests. The research instruments used were validation sheets and response questionnaire sheets. The validation sheet was filled by 2 lecturers and 1 chemistry educator. The response questionnaire sheet was filled by 25 of 11th grade students and 2 chemistry educators of SMAN 2 Sawahlunto. The results showed that 1) POGIL-based LKPD on buffer solution material meets the valid criteria with 85.42% validation results. 2) POGIL-based LKPD on buffer solution material has met the practical criteria with educator practicality response questionnaire results of 92.31% and student response questionnaire results of 82.15%.
Development of E-Supplement Flipbook Material Amino Acid Compounds from Tampoi Fruit (Baccaurea Macrocarpa)
Authors: Hidayat Niko , Masriani Masriani , Sasri Risya , Enawaty Eny , Erlina Erlina
Published: January 2025

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.
Description of Science Teacher Readiness in Implementing Independent Curriculum at SMAN 1 Pulau Maya
Authors: Agustina Bella , Enawaty Eny , Ifriany Andi , Hairida Hairida , Erlina Erlina
Published: January 2025

This study aims to evaluate the readiness of science teachers at State Senior High School (SMAN) 1 Pulau Maya in implementing the Merdeka Curriculum, with a focus on understanding the curriculum and readiness in developing teaching modules. The method used is descriptive qualitative, with data collection through observation, interviews, and documentation of three science teachers (Chemistry, Biology, and Physics). The results showed that the teachers' understanding of the curriculum reached excellent scores, namely 100 for Chemistry, 100 for Biology, and 93.8 for Physics, with an average of 98. However, their readiness in preparing teaching modules was at a sufficient level, with a percentage of 55% for Chemistry, 67% for Biology, and 72% for Physics, an average of 65% thus classified as ready. In conclusion, although science teachers have understood the curriculum well, there is still a need to improve their readiness in preparing teaching modules in order to carry out the learning process optimally.
Antidiabetic Effect of Ethanol Extract of Keji beling Leaves (Strobhilantes crispa) in Rats Induced by Streptozotocin
Authors: Nuraqidah Nuraqidah , Hasnaeni Hasnaeni , Mirawati Mirawati
Published: January 2025

Diabetes Mellitus (DM) type 2 is a chronic disease characterized by increased glucose levels in the body due to insulin resistance or inadequate insulin production. This study aims to determine the antidiabetic potential of keji beling ( Strobhilantes crispa) leaf extract. This research is different from other studies which used Alloxan as a diabetes inducer. In this study, Streptozotocin was used as a DM inducer. After treatment, information was obtained that keji beling (S. crispa) extract could reduce blood glucose levels in type 2 DM rats. Experimental research used 30 male Wistar rats divided into six groups consisting of normal group, negative control (HFD and Streptozotocin), positive control (Glibenclamide), dose group I (150 mg/kg BW), dose II (300 mg/ kg BW), and dose III (450 mg/kg BW). Based on the research results, it is known that S.crispa leaf extract can reduce blood glucose levels in mice induced by Streptozotocin and has the potential to act as an antihyperglycemic in type 2 DM.
Ethnochemistry: Studying The Food Chemistry In The Making of Kapurung
Authors: Imranah Imranah , Yusaerah Nur , Wana Nur , Faradita Udita
Published: January 2025

Kapurung is a traditional food from South Sulawesi, especially from Tanah Luwu/Luwu Raya. This food is made from sago (Metroxylon sago) as the basic ingredient which is processed together with various vegetables and meat or fish. The concept of ethnochemistry is used to examine the process of making kapurung through analyzing the natural ingredients used and the chemical changes that occur during processing. The way kapurung is made reflects the local knowledge of the community in managing existing natural resources. The research was conducted to reveal the chemical aspects and fundamental chemical activities contained in the process of making kapurung.This research uses descriptive qualitative research with ethnographic methods, namely observation, interviews, and documentation. Data analysis in this study used source triangulation which was carried out inductively, so that in this study key informants, main informants and supporting informants were determined on each aspect that became the object of research.The results showed that the fundamental chemical activities contained in the kapurung making process are the gelatinization of starch in sago, protein denaturation, fiber degradation and the dissolution of nutrients in vegetables, the Maillard reaction in fried/roasted fish/chicken, and the use of food additives in the kapurung making process.
Development of Animated Video Learning Media Integrated with Quranic Verses on Molecular Shape Material for 11th Grade Student
Authors: Udzri Muhammad Taufiq , Mawarnis Elvy Rahmi , Sari Dwivelia Aftika
Published: January 2025

This research was motivated by the limited availability of learning media used as a source of student learning which has an impact on the quality and learning process. Learning media used by educators are still simple and non-technological. Therefore, it is necessary to develop a learning media to be used as an additional learning resource for students The learning media developed consists of animated videos integrated with verses from the Quran. The purpose of this research is to produce animated videos integrated with Quranic verses on molecular form material that are valid and practical. This research uses the Research and Development research method with the 4-D model (define, design, develop, and disseminate). Based on the results of the research conducted, it was found that 1) the animated video integrated with Quranic verses met the criteria of being very valid with a percentage of content feasibility on the material of 90.17%, content feasibility on the interpretation expert obtained a percentage of 95%, presentation feasibility obtained a percentage of 93.75%, presentation feasibility on the interpretation expert obtained a percentage of 100%, linguistic feasibility obtained a percentage of 92.41%, linguistic feasibility on the interpretation expert obtained a percentage of 96.87% and feasibility of grammatical obtained a percentage of 92.50%, 2) the animated video integrated with Quranic verses on molecular shape material has met the criteria of very practical with the results of student response questionnaires on the ease of use indicator obtained a percentage of 87.10%, the interest indicator obtained a percentage of 90.17%, the usefulness indicator obtained a percentage of 89.28 and time efficiency obtained a percentage of 90.62%. The results of this study indicate that the animated video developed can be used as a learning resource for students.