Journal of Authentic Research
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Analisis Uji Impak pada Elektroplating Krom Dekoratif Menggunakan Logam Basis Tembaga dengan Variasi Suhu
No full textPenelitian ini mengkaji pengaruh variasi suhu selama proses elektroplating krom dekoratif terhadap kekuatan impak dan kecerahan logam dasar tembaga. Elektroplating dilakukan pada tiga suhu berbeda: 50°C, 60°C, dan 70°C. Hasil penelitian menunjukkan bahwa suhu elektroplating yang lebih tinggi menghasilkan peningkatan kecerahan dan kekuatan impak sampel tembaga yang dilapisi. Secara khusus, kekuatan impak meningkat dari 1,8371 joule/mm² pada suhu 50°C menjadi 1,9259 joule/mm² pada suhu 70°C. Hal ini menunjukkan bahwa pengendalian suhu pelapisan sangat penting untuk mengoptimalkan sifat estetika dan mekanik dari logam yang dilapisi. Temuan ini sangat relevan bagi industri seperti otomotif dan dirgantara, di mana peningkatan performa mekanik dan kualitas permukaan sangat penting. Penelitian ini berkontribusi pada pemahaman yang lebih baik tentang peran suhu dalam proses elektroplating dan memberikan wawasan praktis untuk meningkatkan kualitas produk melalui optimasi suhu.
Analysis of Impact Test on Decorative Chrome Electroplating Using Copper Base Metal with Temperature Variations
Abstract
This study investigates the effect of temperature variations during the decorative chrome electroplating process on the impact strength and brightness of copper-based metal. Electroplating was conducted at three different temperatures: 50°C, 60°C, and 70°C. The results indicated that higher electroplating temperatures lead to increased brightness and impact strength of the coated copper samples. Specifically, the impact strength increased progressively from 1.8371 joules/mm² at 50°C to 1.9259 joules/mm² at 70°C. This suggests that controlling the plating temperature is crucial for optimizing both the aesthetic and mechanical properties of electroplated metals. These findings are particularly relevant for industries such as automotive and aerospace, where enhanced mechanical performance and surface quality are critical. The study contributes to a better understanding of the role of temperature in the electroplating process and provides practical insights for improving product quality through temperature optimization
Identifikasi Kemampuan Pemahaman Konsep Siswa SMA Negeri 1 Bati-Bati menggunakan Metode Certainty of Response Index pada Materi Gaya
No full textPenelitian ini bertujuan untuk mengidentifikasi pemahaman konsep gaya di kalangan siswa SMA Negeri 1 Bati-Bati menggunakan metode Certainty of Response Index (CRI). Penelitian ini menggunakan pendekatan survei deskriptif kuantitatif, yang dilaksanakan dari Desember 2020 hingga Juni 2021, melibatkan 65 siswa kelas XI IPA yang dipilih secara acak. Instrumen penelitian terdiri dari 20 soal yang diadaptasi dari Force Concept Inventory, mencakup topik-topik seperti identifikasi gaya, kinematika, serta Hukum I, II, dan III Newton. Hasil penelitian mengungkapkan tingkat miskonsepsi yang signifikan di antara siswa, terutama dalam memahami Hukum III Newton, di mana tingkat miskonsepsi mencapai 91%. Secara keseluruhan, 86,75% siswa menunjukkan adanya miskonsepsi, sementara hanya 3,65% yang menunjukkan pemahaman konsep yang benar. Metode CRI terbukti efektif dalam membedakan antara siswa yang menebak jawaban dan yang yakin dengan pengetahuannya. Penelitian ini menekankan pentingnya intervensi yang tepat dan strategi pengajaran yang efektif untuk mengatasi miskonsepsi ini. Keterbatasan penelitian ini termasuk ukuran sampel yang terbatas pada satu sekolah, yang dapat mempengaruhi generalisasi hasil. Selain itu, penelitian ini tidak melibatkan intervensi untuk memperbaiki miskonsepsi yang teridentifikasi. Penelitian masa depan sebaiknya memperluas ukuran sampel, menyesuaikan instrumen dengan konteks pendidikan lokal, dan memasukkan intervensi eksperimental untuk meningkatkan pemahaman konsep. Temuan ini berkontribusi signifikan pada pengembangan pendidikan fisika, menyediakan dasar untuk memperbaiki metode pengajaran dan mengatasi miskonsepsi siswa.
Assessment of Conceptual Understanding Capabilities of High School Students at SMA Negeri 1 Bati-Bati Using the Certainty of Response Index Method in the Context of Force
Abstract
This study aimed to identify the conceptual understanding of force among students at SMA Negeri 1 Bati-Bati using the Certainty of Response Index (CRI) method. The research employs a descriptive quantitative survey approach, conducted from December 2020 to June 2021, involving 65 randomly selected students from the 11th-grade science program. The research instrument consists of 20 questions adapted from the Force Concept Inventory, covering topics such as force identification, kinematics, and Newton's First, Second, and Third Laws. The findings reveal a significant level of misconceptions among students, particularly in understanding Newton's Third Law, where the misconception rate reached 91%. Overall, 86.75% of students demonstrated misconceptions, while only 3.65% showed correct understanding. The CRI method proved effective in distinguishing between students who guessed the answers and those who were confident in their knowledge. This study underscores the importance of targeted interventions and effective teaching strategies to address these misconceptions. Limitations of this research include the sample size being limited to one school, potentially affecting the generalizability of the results. Additionally, the study did not involve intervention to correct identified misconceptions. Future research should expand the sample size, adapt the instrument to the local educational context, and include experimental interventions to improve conceptual understanding. The findings contribute significantly to the development of physics education, providing a foundation for improving teaching methods and addressing student misconceptions
Pengembangan LKS berbasis POE untuk Meningkatkan Hasil Belajar Kognitif Siswa pada Materi Kingdom Animalia
No full textTujuan penelitian ini adalah mengembangkan LKS berbasis model pembelajaran POE (Predict Observe Explain) yang valid, praktis, dan efektif untuk meningkatkan hasil belajar kognitif pada materi Kingdom Animalia. Penelitian ini merupakan penelitian pengembangan menggunakan model 4D. Validasi produk pengembangan melibatkan dua validator, sedangkan kepraktisan ditinjau dari keterlaksanaan pembelajaran yang diamati oleh dua observer dan hasil analisis respon siswa. Keefektifan ditinjau dari hasil belajar kognitif siswa setelah pembelajaran menggunakan LKS berbasis model pembelajaran POE. Penelitian ini melibatkan 20 siswa kelas X SMAN 1 Pringgarata. Instrumen penelitian berupa lembar validasi, observasi keterlaksanaan pembelajaran, tes hasil belajar kognitif, dan angket respon siswa. Data penelitian dianalisis secara deskriptif menggunakan persamaan n-gain. Hasil penelitian menunjukkan bahwa LKS biologi berbasis model pembelajaran POE yang dikembangkan valid (skor: 3,457) baik secara isi maupun konstruk. Keterlaksanaan pembelajaran mengalami peningkatan dengan skor rata-rata yaitu 89,7% dan respon siswa ditemukan berkategori sangat kuat (persentase: 88,65%). Sedangkan hasil belajar kognitif meningkat (N-Gain=0,68) dengan kategori sedang, setelah pembelajaran menggunakan LKS berbasis model pembelajaran POE. Penelitian ini menyimpulkan bahwa LKS berbasis POE (Predict Observe Explain) yang dikembangkan valid, praktis, dan efektif dalam meningkatkan hasil belajar kognitif siswa kelas X SMAN 1 Pringgarata pada materi Kingdom Animalia.
Development of POE-based Student Worksheets to Enhance Students’ Cognitive Learning Outcomes on the Kingdom Animalia Subject Material
Abstract
The aim of this research was to develop valid, practical, and effective POE (Predict Observe Explain) model-based Student Worksheets (LKS) to enhance cognitive learning outcomes in the subject of Kingdom Animalia. This study utilized 4D development model. The validation of the development product involved two validators, while the practicality was assessed through the implementation of the learning process observed by two observers, along with an analysis of student responses. The effectiveness was measured by comparing the cognitive learning outcomes of students before and after using the POE model-based LKS. The study was conducted with 20 tenth-grade students from SMAN 1 Pringgarata. Research instruments included validation sheets, observations of the learning process, cognitive learning outcome tests, and student response questionnaires. The collected data were analyzed descriptively using the n-gain formula. The results indicated that the biology worksheets based on the POE model were valid (score: 3.457), both in terms of content and construct. The implementation of the learning process showed improvement, with an average score of 89.7%, and student responses were categorized as very strong (percentage: 88.65%). Moreover, the cognitive learning outcomes showed a moderate improvement (N-Gain=0.68) after using the POE model-based LKS. In conclusion, the POE model-based LKS developed in this research is valid, practical, and effective in enhancing the cognitive learning outcomes of tenth-grade students at SMAN 1 Pringgarata in the subject of Kingdom Animalia
Pengaruh Metode Demonstrasi terhadap Daya Nalar Matematis Siswa Sekolah Menengah
No full textPenelitian ini bertujuan untuk mengetahui pengaruh metode demonstrasi terhadap daya nalar siswa pada materi garis dan sudut. Penelitian ini merupakan penelitian eksperimen semu dengan nonequivalent control group design. Kelas VII A (37 siswa) dan VII B (37 siswa) pada salahsatu SMP di Lombok Tengah digunakan sebagai sampel yang diambil secara purposive sampling. Data penelitian dikumpulkan menggunakan instrumen tes berbentuk essai. Data daya nalar siswa dianalisis secara statistic menggunakan uji Z. Berdasarkan hasil tes akhir, rata-rata daya nalar siswa pada kelas eksperimen sebesar 76,95 dan pada kelas kontrol sebesar 60,56. Hasil uji-Z daya nalar siswa diperoleh Zhitung sebesar 0,579 lebih besar dari Ztabel sebesar 1,96 dan hasil, maka Ho ditolak, sehingga dapat disimpulkan bahwa terdapat pengaruh metode demonstrasi terhadap daya nalar siswa sekolah menegah.
The Effect of the Demonstration Method on Students' Mathematical Reasoning Ability in Secondary School
Abstract
This study aims to determine the effect of the demonstration method on students' reasoning abilities in the topic of lines and angles. This research employs a quasi-experimental design with a nonequivalent control group. Class VII A (37 students) and VII B (37 students) in one of the middle schools in Central Lombok were selected as the sample using purposive sampling. Research data was collected using an essay test instrument. Students' reasoning abilities data were statistically analyzed using the Z-test. Based on the final test results, the average reasoning ability score of the experimental group was 76.95, while that of the control group was 60.56. The Z-test results for students' reasoning abilities yielded a calculated Z value of 0.579, which is greater than the critical Z value of 1.96. As a result, the null hypothesis (Ho) is rejected, leading to the conclusion that there is an influence of the demonstration method on the reasoning abilities of secondary school students
Syndicate Group Learning Instruction: An Interactive Way to Improve Students’ Activities and Learning Outcomes
No full textThis research aims to describe the influence of Syndicate Group Learning Instruction on the improvement of activities and physics learning outcomes of 8th-grade students at SMPN 18 Mataram. The research design employed is an experimental study. The population of this study comprises all 8th-grade students at SMPN 18 Mataram. The sample consists of 22 students from class VIIIA as the experimental group and 24 students from class VIIIC as the control group selected using a random sampling technique. Data for this study were obtained through pre-tests and post-tests given to the sample class students. Data collection techniques involve using observation sheets and formative tests that have been validated for validity, reliability, differential power, and difficulty index. Based on the data analysis, the average pre-test score for the experimental group is 56.13; for the control group, it is 46.66, categorized as homogeneous and normally distributed. The post-test results show an average of 69.31 for the experimental group and 58.54 for the control group. The final test data of the sample class students were analyzed using the t-test, resulting in a calculated t-value of 2.160 and a tabulated t-value of 2.016. The calculated t-value is greater than the tabulated t-value at a 5% error level, thus rejecting the null hypothesis (Ho). It can be concluded that the use of Syndicate Group Learning Instruction has a significant influence on the activities and physics learning outcomes of 8th-grade students at SMPN 18 Mataram
Pengembangan Materi Ajar Impuls dan Momentum Menggunakan Model Pengajaran Langsung Untuk Melatih Keterampilan Pemecahan Masalah
No full textHasi penelitian menunjukkan peran materia ajar sangat krusial dalam pembelajaran fisika. Sayangnya, ketersediaan materia ajar yang relevan masih kurang diperhatikan sehingga keterampilan pemecahan masalah siswa masih tergolong rendah pada saat diberikan latihan soal. Tujuan penelitian ini adalah mendeskripsikan validitas, kepraktisan, dan efektivitas materi ajar fisika. Penelitian ini merupakan penelitian pengembangan menggunakan model desain ASSURE. Penelitian ini melibatkan dua validator ahli (dosen) dan satu validator praktisi (guru matapelajaran) untuk menguji validitas materi ajar. Pada tahap uji kepraktisan dan keefektifan, 27 siswa kelas X MIPA 5 di SMA Negeri 2 Banjarmasin dilibatkan dalam penelitian ini. Data penelitian diperoleh menggunakan lembar validasi materi ajar, angket respon siswa, dan tes hasil belajar siswa yang dianalisis secara deskriptif-kuantitatif. Hasil penelitian menunjukkan bahwa (1) validitas materi ajar berdasarkan lembar validasi berkategori valid (skor: 3,38) dan reliabel (r: 0.97), (2) kepraktisan materi ajar berdasarkan angket respon siswa berkategori praktis (skor: 3,08), (3) efektivitas materi ajar berdasarkan tes hasil belajar berkategori sedang (n-gain: 0,62). Berdasarkan hasil penelitian, dapat disimpulkan bahwa materi ajar impuls dan momentum yang dikembangkan valid, praktis dan efektif untuk melatihkan keterampilan pemecahan masalah dan layak untuk digunakan dalam pengajaran fisika.
Development of Teaching Materials for Impulse and Momentum Using the Direct Instruction Model to Train Problem-Solving Skills
Abstract
Research results indicate the crucial role of teaching materials in physics learning. Unfortunately, the availability of relevant teaching materials is still overlooked, resulting in students' problem-solving skills being relatively low when given problem-solving exercises. The purpose of this study is to describe the validity, practicality, and effectiveness of physics teaching materials. This research is a development study using the ASSURE design model. The study involved two expert validators (lecturers) and one practitioner validator (subject teacher) to test the validity of the teaching materials. In the practicality and effectiveness test phases, 27 students from class X MIPA 5 at SMA Negeri 2 Banjarmasin were involved in this study. Research data were obtained using teaching material validation sheets, student response questionnaires, and student learning outcome tests, which were analyzed descriptively and quantitatively. The results show that (1) the validity of teaching materials based on the validation sheet is categorized as valid (score: 3.38) and reliable (r: 0.97), (2) the practicality of teaching materials based on student response questionnaires is categorized as practical (score: 3.08), (3) the effectiveness of teaching materials based on learning outcome tests is categorized as moderate (n-gain: 0.62). Based on the research results, it can be concluded that the developed teaching materials for impulse and momentum are valid, practical, and effective for training problem-solving skills and are suitable for use in physics teaching
Semantic Analysis and Interpretation of Meanings in Word Quotations in KIS Candy Packaging
No full textA word's meaning can be determined if it has been used in a speech or sentence. The meaning of a word becomes important when it can be linked to someone's memory or something else. This study aims to explore and interpret the linguistic meanings contained in the KIS candy packaging. This study uses a type of qualitative research that describes data using a series of sentences. The object of this research is the quotation of words found on KIS candy packaging. Data collection uses the technique of observing and noting. In addition, the research instrument is the researcher himself as the key instrument. After obtaining research data that is appropriate to the research topic, it will be analyzed using the referential equivalent technique included in the introduction to semantics. The results of the analysis that has been carried out on the research data in the form of words contained in the KIS candy packaging, the researcher obtains sixteen words that will be used as material for analysis in this study. From the sixteen words that have been collected, eight words have pictorial meaning, three words have referential meaning, two words have emotive meaning, two words have a central meaning, and one connotative meaning. The results of this study can provide an overview and knowledge about the shifts and transformations in vocabulary in Indonesian according to the context of the times
Meningkatkan Pemahaman Konsep dan Kesadaran Metakognisi Siswa pada Materi Struktur Atom Melalui Pemodelan
No full textPemahaman konsep siswa pada materi struktur atom tergolong rendah sehingga menyebabkan kesulitan siswa dalam mengkonstruksi pengetahuan baru. Siswa bahkan tidak dapat menangkap konsep inti dari keseluruhan konsep yang dipelajari. Penelitian ini bertujuan untuk meningkatkan pemahaman konsep dan kesadaran metakognisi siswa pada materi struktur atom. Penelitian tindakan kelas yang dilaksanakan dalam dua siklus dan melibatkan 30 siswa kelas X IPA SMAN 2 Pujut dilakukan untuk mencapai tujuan penelitian. Tes pemahaman konsep berupa lima butir soal uraian dan Metacognitive Awareness Inventory (MAI) diadmisnistrasikan pada setiap siklus penelitian untuk mengidentifikasi pemahaman konsep dan kesadaran metakognisi siswa. Data penelitian dianalisis secara deskriptif melalui penentuan skor dengan skala 100. Peningkatan pemahaman konsep dan kesadaran metakognisi siswa juga dianalisis dalam penelitian ini menggunakan persamaan n-gain. Hasil penelitian menunjukkan pemahaman konsep siswa mencapai rata-rata 65,20 (siklus I) dan 75,47 (siklus II), dengan persentase ketuntasan sebesar 73,33% (siklus I) dan 86,67 (siklus II). Pemahaman konsep siswa juga ditemukan mengalami peningkatan setelah pembelajaran dengan kategori medium (n-gain= 0,30). Di pihak lain, kesadaran metakognisi siswa juga mengalami peningkatan dengan kategori medium (n-gain= 0,35) dengan rata-rata 63,02 (siklus I) dan 76,25 (siklus II). Hasil temuan tersebut menunjukkan bahwa penerapan pembelajaran pemodelan dengan alat peraga kimia sederhana dapat meningkatkan pemahaman konsep dan kesadaran metakognitif siswa kelas X IPA SMAN 2 Pujut pada materi struktur atom.
Enhancing Conceptual Understanding and Metacognitive Awareness of Students on Atomic Structure through Modeling
Abstract
Understanding of the concept among students in atomic structure is considered low, resulting in difficulties for students in constructing new knowledge. Students are unable to grasp the core concept of the overall concepts being taught. This research aims to improve students' understanding of the concept and metacognitive awareness in the topic of atomic structure. A classroom action research was conducted in two cycles, involving 30 students from the 10th grade of Science Program at SMAN 2 Pujut, to achieve the research objectives. A concept comprehension test consisting of five essay questions and the Metacognitive Awareness Inventory (MAI) were administered in each research cycle to identify students' concept understanding and metacognitive awareness. The research data were analyzed descriptively by scoring with a scale of 100. The improvement in students' concept understanding and metacognitive awareness was also analyzed in this research using the n-gain equation. The results of the study indicate that students' concept understanding reached an average score of 65.20 (cycle I) and 75.47 (cycle II), with a mastery percentage of 73.33% (cycle I) and 86.67% (cycle II). Students' concept understanding also showed an improvement after the instruction with a medium level of improvement (n-gain = 0.30). On the other hand, students' metacognitive awareness also experienced an improvement with a medium level of improvement (n-gain = 0.35), with an average score of 63.02 (cycle I) and 76.25 (cycle II). These findings indicate that the application of modeling learning with simple chemical models can enhance students' concept understanding and metacognitive awareness in the topic of atomic structure among 10th-grade students at SMAN 2 Pujut
Gambaran Profil Lipid pada Peminum Kopi di Dusun Sembung Daye Kecamatan Narmada, Lombok Barat
No full textKebiasaan merokok, mengonsumsi alkohol dan kafein membawa dampak yang tidak baik bagi kesehatan. Nikotin yang terkandung dalam rokok dapat meningkatkan sekresi dari katakolamin sehingga meningkatkan lipolisis. Kafein tidak langsung meningkatkan metabolisme energi dalam tubuh. Konsumsi jangka panjang akan menekan metabolisme energi yang dapat menyebabkan kelelahan adrenal dan berpengaruh buruk pada keseimbangan profil lipid. Penelitian ini dilakukan untuk mengetahui gambaran profil lipid peminum kopi di Dusun Sembung Daye. Penelitian ini merupakan penelitian dengan desain cross sectional dan melibatkan 60 orang responden dengan kriteria peminum kopi, pekerjaan yang seragam dan usia produktif. Sampel darah yang diperoleh kemudian diperiksa di Laboratorium RSUD Patut Patuh Patju, sedangkan data kelompok kontrol diperoleh dari hasil pemeriksaan Laboratorium Klinik Vi Diagnostic Mataram. Intrumen yang digunakan untuk mendapat data sekunder berupa kuisioner kemudian bersamaan dengan data profil lipid dianalisis secara statistic menggunakan SPSS (uji t dan chi kuadrat). Dari penelitian ini diperoleh kadar kolesterol total, trigliserida, High Density Lipoprotein dan Low Density Lipoprotein peminum kopi secara berturut-turut adalah 183,67 mg/dL, 174,75mg/dL, 47,943 mg/dL dan 107,50 mg/dL. Sedangkan untuk kelompok kontrol 174,80 mg/dL, 118,20 mg/dL, 40,075 mg/dL dan 114,68 mg/dL. Hasil analisis statistik menggunakan uji t dan chi kuadrat menunjukkan adanya perbedaan kadar trigliserida dan HDL pada kelompok peminum kopi dengan kelompok kontrol, dimana kadar trigliserida dan HDL kelompok peminum kopi lebih tinggi. Kadar kolesterol total dan LDL kedua kelompok tidak berbeda. Kafestol dan kafein yang terdapat pada kopi meningkatkan trigliserida dan cenderung tidak memengaruhi kolesterol total dan LDL, sedangkan asam klorogenat pada kopi memiliki efek sebagai antioksidan yang meningkatkan kadar HDL.
Profil Lipid on Coffee Drinker in Sembung Daye Village Subdistrict of Narmada, West Lombok
Abstract
The habit of smoking and consuming alcohol and caffeine has an impact that is not good for health. The nicotine in cigarettes can increase the secretion of catecholamines, thereby increasing lipolysis. Caffeine does not directly increase energy metabolism in the body. Long-term consumption will suppress energy metabolism, which can cause adrenal fatigue and adversely affect the balance of lipid profiles. This study described the lipid profile of coffee drinkers in Sembung Daye Hamlet. The research used a crcross-sectional design and involved 60 respondents with the criteria of coffee drinkers, uniform work and productive age. The blood samples obtained were then examined at the Patut Patuh Patju Hospital Laboratory. At the same time, the control group data were obtained from the results of the Vi Diagnostic Mataram Clinic Laboratory. The instrument used to obtain secondary data in the form of a questionnaire and then the lipid profile data were analyzed statistically using SPSS (t test and chi-square). From this study, the total cholesterol, triglyceride, High-Density Lipoprotein, and Low-Density Lipoprotein levels of coffee drinkers were 183.67 mg/dL, 174.75mg/dL, 47.943 mg/dL and 107.50 mg/dL, respectively. While for the control group 174.80 mg/dL, 118.20 mg/dL, 40.075 mg/dL and 114.68 mg/dL. The results of statistical analysis using t and chi-square tests showed differences in triglyceride and HDL levels in the coffee drinker group and the control group, where triglyceride and HDL levels in the coffee drinker group were higher. Total and LDL cholesterol levels were not different between the two groups. The caffeine and caffeine found in coffee increase triglycerides and tend not to affect total and LDL cholesterol, while the chlorogenic acid in coffee has an antioxidant effect that increases HDL levels
Pengaruh Lama Penyimpanan terhadap Kadar “Gula Reduksi” Nira Aren dengan Penambahan Kapur Sirih
No full textNira aren mudah mengalami fermentasi yang disebabkan oleh aktivitas mikroba. Untuk mencegah kerusakan nira akibat fermentasi, dibutuhkan pengawetan menggunakan bahan pengawet dengan waktu yang tepat. Penelitian ini bertujuan untuk mengetahui pengaruh variasi waktu penyimpanan terhadap kadar gula reduksi nira aren yang telah ditambahkan kapur sirih. Penelitian ini bersifat true ekperimental yang dilakukan di Laboratorium Kimia Jurusan Analis Kesehatan Poltekkes Kemenkes Mataram untuk mengetahui pengaruh yang timbul akibat dari perlakuan yang diberikan. Perlakuan terdiri atas 4 waktu penyimpanan yaitu 0 jam, 2 jam, 4 jam dan 6 jam dengan masing-masing 6 kali replikasi. Hasil penetapan kadar gula reduksi nira aren masin-masing perlakuan secara berurutan adalah 2,01%, 2,03%, 2,33% dan 0,62%. Kesimpulan dari penelitian ini yaitu waktu simpan maksimal nira aren yang diawetkan dengan kapur sirih adalah 4 jam, sedangkan waktu optimalnya adalah 2 jam. Rekomendasi untuk penelitian lanjutan diuraikan lebih detail dalam artikel ini.
The Effect of Storage Duration on the Reducing Sugar Content of Arenga Sap with the Addition of Betel Lime
Abstract
Aren sap is prone to fermentation caused by microbial activity. To prevent sap damage due to fermentation, preservation using appropriate preservatives is required. This study aims to determine the influence of storage time variations on the reducing sugar content of arenga sap added with betel lime. The study follows a true experimental design conducted at the Chemistry Laboratory, Department of Health Analysts, Polytechnic of Health Ministry of Health Mataram, to assess the effects of the treatments. The treatments consisted of four storage times, namely 0 hours, 2 hours, 4 hours, and 6 hours, each with six replications. The results of reducing sugar content determination for each treatment were 2.01%, 2.03%, 2.33%, and 0.62%, respectively. The conclusion of this research is that the maximum storage time for preserved arenga sap with betel lime is 4 hours, while the optimal time is 2 hours. Detailed recommendations for further research are presented in this article