Article Per Year (5 Year)
p-Index From 2021 - 2026
4.468
P-Index
This Author published in this journals
All Journal Jurnal Pendidikan Kimia Indonesia Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Akademika Kimia Jurnal SOLMA JMM (Jurnal Masyarakat Mandiri) Agritechnology : Jurnal Teknologi Pertanian Jurnal Inovasi dan Teknologi Pembelajaran (JINOTEP) Kajian dan Riset Dalam Teknologi Pembelajaran Patria : Jurnal Pengabdian Kepada Masyarakat Jurnal Riset Pendidikan MIPA Jurnal Abdimas Ilmiah Citra Bakti (JAICB) Mattawang: Jurnal Pengabdian Masyarakat Jurnal Akademika Kimia Jurnal Ilmu Pendidikan Indonesia Jurnal Akademika Kimia Jurnal Pendidikan MIPA Jurnal Abdimas Ilmiah Citra Bakti
Mery Napitupulu
Pendidikan Kimia FKIP Universitas Tadulako Palu Indonesi 94119
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

Published : 61 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 61 Documents
Search

 3   4   5   6   7 
Karakteristik Fisikokimia Sirup Glukosa dari Sagu (Metroxylon sp) Lokal Papua yang Diproduksi Secara Enzimatis Napitupulu, Mery; Sarungallo, Zita; Situngkir, Risma U; Iriani, Fitri; Hutagaol, Jhon; Ginting, Dewi
Agritechnology Vol 7 No 2 (2024): Volume 7 Nomor 2 (Desember) 2024
Publisher : Fakultas Teknologi Pertanian, Universitas Papua, Manokwari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51310/agritechnology.v7i2.130

Abstract

Jenis pati sagu (Metroxylon sp.) yang tumbuh di Papua dan Papua Barat sangat beragam, yang berpotensi untuk diolah menjadi sirup glukosa dengan cara enzimatis. Penelitian ini bertujuan untuk mmenghasilkan sirup glukosa secara enzimatis dari pati sagu yang berasal dari 4 sentra produksi yaitu Kabupaten Manokwari, Teluk Bintuni, Wasior dan Serui; dan menentukan karakteristik fisikokimia dari pati sagu, serta sirup glukosa yang dihasilkan. Metode yang digunakan dalam penelitian ini adalah metode eksperimen, dengan rancangan acak kelompok (RAK). Perlakuan terdiri dari empat jenis pati sagu dari empat lokasi di Provinsi Papua dan Papua Barat yaitu Kabupaten Manokwari (P1), Kabupaten Teluk Bintuni(P2), Kabupaten Wasior (P3), dan Serui (P4). Produksi sirup glukosa dilakukan secara enzimatis menggunakan enzim α-amilase dan Glukoamilase. Hasil penelitian ini menunjukan sifat fisikokimia pati sagu asal 4 Kabupaten memiliki kadar air 12,36-13,44%, kadar abu 0,02-0,07% (basis kering, bk), kadar pati 81,49-84,19% (bk), amilosa 36,8-36,55% (bk), amilopektin 46,86-47,23% (bk), dan derajat asam 1,73-1,80 ml NaOH 1N/100g), telah memenuhi syarat mutu pati sagu SNI-1995. Proses pembuatan sirup glukosa pati sagu secara enzimatis melalui dua tahap yaitu likuifikasi menggunakan α-amilase 0,1% dengan suhu 90oC selama 50 menit, dan sakarifikasi menggunakan glukoamilase 0,08% pada suhu 50oC selama 24 jam, dilanjutkan dengan tahap evaporasi. Sirup glukosa yang dihasilkan memiliki warna coklat tua-agak kuning; aroma normal; rasa manis, dengan rendemen (66,09-71,11%), dengan kadar air (12,37-18,76%), kadar abu (0,05-0,06%), gula pereduksi (47,18-53,03 μg/ml), dan total padatan terlarut (51,10-69,05 oBrix) yang telah memenuhi standar SNI-2013. Semakin putih pati sagu cenderung menghasilkan warna sirup glukosa yang semakin terang.
Tantangan yang Dihadapi Guru IPA dalam Menerapkan Pembelajaran berdiferensiasi di SMP Palu Sulawesi Tengah Indonesia Napitupulu, Nurasyah Dewi; Ratu, Bau; Walanda, Daud K; Napitupulu, Mery
Jurnal Penelitian Pendidikan IPA Vol 9 No SpecialIssue (2023): UNRAM journals and research based on science education, science applic
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9iSpecialIssue.6383

Abstract

Within the ever-evolving scene of instruction, the usage of differentiated learning, an approach planned to cater to assorted student’s needs, has picked up unmistakable quality. This article investigates the challenges experienced by science teachers as they explore the complexities of joining differentiated learning procedures into their classrooms in junior high schools in Palu, Central Sulawesi-Indonesia. A mixed-methods investigative plan, comprising overviews and interviews, was utilized to explore the encounters of science teachers. The quantitative stage uncovered that whereas a critical parcel of teachers grasped differentiated learning, they experienced challenges such as time limitations (80%), substance adjustment (50%), constraints to fitting educating assets (20%), students’ resistance (30%), and inadequately proficient improvement (20%). The subjective stage gives in-depth experiences into these challenges, highlighting the requirement for imaginative procedures, progressing back, and asset accessibility to overcome them. The consideration underscores the significance of tending to these challenges to cultivate a more comprehensive and locks-in science teaching-learning environment that benefits both teachers and students
Training on The Implementation of Practical Field Experience (PPL) Based On Lesson Study to Teachers of PPG FKIP Untad Partner Schools In East Palu-Mantikulore District, Palu City: Pelatihan Pelaksanaan Praktik Pengalaman Lapangan (PPL) Berbasis Lesson Study Kepada Guru-Guru Sekolah Mitra PPG FKIP Untad di Kecamatan Palu Timur-Mantikulore Kota Palu Sabang, Sri Mulyani; Arwansyah, Arwansyah; Tahril, Tahril; Walanda, Daud Karel; Napitupulu, Mery
Mattawang: Jurnal Pengabdian Masyarakat Vol. 4 No. 4 (2023)
Publisher : Yayasan Ahmar Cendekia Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/454RI.mattawang2190

Abstract

Lesson Study is an approach to improving the quality of learning carried out by teachers collaboratively, with the main steps of designing learning to achieve goals, implementing learning, observing the implementation of the learning, and reflecting to discuss the learning studied and improve it and plan the next lesson. The main focus of implementing lesson study is student activities in class, with the assumption that student activities are related to teacher activities while teaching in class. In implementing PPL Education at UNTAD, the implementation of Lesson Study is integrated with the implementation of clinical supervision. The aim is to improve the quality of student learning outcomes and learning products. However, what is still experienced by the world of education today is that more than 50% of teachers do not understand and pay less attention to achieving and improving pedagogical and professional competence, including in schools in Palu City. To teach teachers to implement LS, it is not enough if teachers are introduced to what and how to implement it, but they also need to be introduced to why, what the long-term and short-term goals of implementation are. Teachers also need to be introduced to what the requirements are, what the difficulties and obstacles are in implementation, and that the main requirement for implementation is a commitment to benefit the nation's children. One of the critical characteristics of intelligent humans is that they not only know something but also how to respond and act on it.AbstrakLesson Study merupakan suatu pendekatan peningkatan kualitas pembelajaran yang dilaksanakan oleh guru secara kolaboratif, dengan langkah-langkah pokok merancang pembelajaran untuk mencapai tujuan, melaksanakan pembelajaran, mengamati pelaksanaan pembelajaran tersebut, serta melakukan refleksi untuk mendisukusikan pembelajaran yang dikaji tersebut dan menyempurkannya dan merencanakan pembelajaran berikutnya. Fokus utama pelaksanaan Lesson Study adalah aktivitas siswa di kelas, dengan asumsi bahwa aktivitas siswa tersebut terkait dengan aktivitas guru selama mengajar di kelas. Dalam penyelenggaraan PPL Kependidikan di UNTAD, penerapan Lesson Study diintegrasikan dengan penerapan supervisi klinis. Tujuannya untuk meningkatkan kualitas hasil belajar dan produk belajar siswa. Namun yang masih dialami oleh dunia pendidikan sampai saat ini adalah lebih besar 50% guru yang kurang memahami dan kurang memperhatikan pencapaian dan peningkatan kompetensi pedagogik dan professional, termasuk di sekolah-sekolah yang ada di Kota Palu. Untuk membelajarkan guru melaksanakan LS tidak cukup bila guru dikenalkan pada apa dan bagaimana melaksanakannya, tetapi juga perlu dikenalkan mengapa, apa tujuan jangka panjang dan jangka pendek pelaksanaan. Guru juga perlu dikenalkan pada apa persyaratannya, apa kesulitan dan hambatan pelaksanannya, dan bahwa persyaratan utama pelaksanannya adalah adanya komitmen untuk memaslahatkan anak bangsa. Salah satu ciri kritis manusia cerdas yakni tidak hanya mengetahui sesuatu tetapi juga bagaimana menanggapi dan menindaklanjutinya.
Pemanfaatan Student Worksheet Berbasis HyperDocs bagi Guru SMA untuk Meningkatkan Kreativitas Sains dalam Pembelajaran Kimia Poba, Detris; Walanda, Daud K.; Napitupulu, Mery; Enar, Rohmala; Walanda, Ryka M.
Jurnal SOLMA Vol. 14 No. 3 (2025)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v14i3.20906

Abstract

Background: Pemanfaatan student worksheet yang interaktif menunjang kreativitas sains siswa. Kreativitas sains diperlukan oleh siswa di era saat ini dalam memecahkan permasalahan yang berhubungan dengan kehidupan sehari-hari. Dengan demikian, tujuan dari pengabdian ini yaitu memberikan pembimbingan bagi guru dalam menciptakan student worksheet yang interaktif menggunakan HyperDocs untuk meningkatkan kreativitas sains dalam pembelajaran kimia. Student worksheet yang akan dirancang merupakan hasil penelitian dan telah tervalidasi. Metode: Metode tahapan pelaksanaan terdiri dari sosialisasi, pelatihan, penerapan teknologi, pendampingan dan evaluasi, serta keberlanjutan program. Sebanyak 24 guru kimia yang tergabung dalam MGMP kota Palu menjadi sasaran kegiatan. Hasil: Melalui kegiatan pengabdian guru-guru SMA yang tergabung dalam MGMP Kimia Kota Palu dapat merancang dan menggunakan student worksheet berbasis HyperDocs untuk meningkatkan kreativitas sains utamanya pengaplikasian dalam materi kimia. Kesimpulan: Kegiatan pengabdian memberikan dampak positif bagi guru dan mendapatkan respon sangat baik, serta guru-guru memperoleh peningkatan keterampilan digital yang berguna dalam menunjang kurikulum merdeka.
Comparison of Maceration and Soxhlet Extraction Methods on Flavonoid Contents from Papaya (Carica papaya) Anggraini, Windi; Napitupulu, Mery; Walanda, Daud K.; Poba, Detris
Jurnal Akademika Kimia Vol. 14 No. 2 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i2.pp112-117

Abstract

The papaya plant offers numerous benefits. Each part of the papaya plant has its benefits, starting from the fruit, stem, roots, flowers, and leaves. Livestock Medicine confirmed the presence of at least 22 types of bioactive compounds. The papaya plant contains active compounds that act as antioxidants, including flavonoids. This research aims to compare maceration and Soxhlet extraction methods on the flavonoid content of papaya (Carica papaya) leaf extract as measured using a UV-Vis spectrophotometer. The methods used to separate flavonoid levels are maceration and Soxhlet extraction. Based on the research that has been carried out, it was found that two treatments were carried out in the maceration method: the first treatment was with 70 % ethanol solvent, namely 36.6 mg / 100g or 3.66 %, for 96 % ethanol solvent, namely 77.6 mg / 100g or 7.76 %. Two treatments are also carried out in the Soxhlet method: 70% ethanol (33.6 mg/100g, 3.36%) and 96% ethanol (92.6 mg/100g, 9.26%). These results indicate that Soxhlet extraction is the most effective method for producing flavonoids in papaya leaf extract, as the levels obtained are higher than those obtained by maceration.
Development of E-LKPD Wizer: A Solution to Improve Problem Solving Skills and Ecological Attitude in Junior High School Students Siti Fathonah Septianingsih; Nurasyah Dewi Napitupulu; Mery Napitupulu; Ratman; I Nengah Kundera
Jurnal Penelitian Pendidikan IPA Vol 10 No 12 (2024): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i12.8621

Abstract

The objective of this study was to develop and assess the impact of Wizer E-LKPD on the problem-solving skills and ecological attitudes of 28 VIIC class students at SMP Negeri 1 Wita Ponda. The study employed the ADDIE model as its research framework and utilized a one-group pretest-posttest design with purposive sampling. The research instruments included validation sheets, response questionnaires completed by teachers and students, tests of problem-solving abilities, and an ecological attitude questionnaire. The findings indicated that Wizer E-LKPD was highly valid, with an average rating of 94.12%. The results demonstrated that the Wizer E-LKPD effectively enhanced problem-solving skills, achieving a medium effect size of 0.65, and improved ecological attitudes with a simple effect size of 0.30. Therefore, it can be concluded that the Wizer E-LKPD is a valid, practical, and effective tool for improving students' problem-solving abilities and fostering ecological attitudes in science learning at SMP Negeri 1 Wita Ponda.
Making Biochar from Palapi Wood Waste (Heritiera sp.) for Decolourisation of Dyes in Water Razni, Razni; Napitupulu, Mery; Walanda, Daud K.; Poba, Detris
Jurnal Akademika Kimia Vol. 14 No. 4 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i4.pp209-217

Abstract

Dye waste from industries such as batik can pollute the environment and endanger health because it is carcinogenic. One solution to handle this is to use biochar as an adsorbent, where in this study, the biomass used as biochar is palapi wood waste in the form of wood husks. This study aims to determine the adsorption capacity of biochar from palapi wood waste against indigsol blue and remazol yellow dyes with variations in weight, time, and pH. The method used in this study is the pyrolysis method, namely the process of heating biomass materials at high temperatures without or with little oxygen. Characterization was carried out by determining the water content, ash content, functional groups, and morphology of the biochar. Decolorization efficiency was analyzed using a UV-Vis spectrophotometer. The results showed that the water content at temperatures of 400 ℃, 450 ℃, and 500 ℃ were 11.9 %, 6.6 %, and 5.3 %, respectively. The ash content at the same temperature was 2.3 %, 7.5 %, and 8.7 %, respectively. The maximum weight with variations of 50, 75, 100, and 125 mg in adsorbing 2 dyes is 125 mg with an adsorption percentage of indigosol blue dye of 41% and remazol yellow dye of 42.9 %. The optimum time for biochar to adsorb indigosol blue dye is 50 minutes, with an adsorption percentage of 47.9, and remazol yellow dye for 40 minutes, with an adsorption percentage of 79 %. The optimum pH of indigosol blue and remazol yellow dyes by biochar occurs at pH 7, with an adsorption percentage of indigosol blue dye of 93.03 % and remazol yellow dye of 87.4 %. The absorption capacity of biochar for indigosol blue and remazol yellow dyes follows the Langmuir absorption isotherm of 0.9194 mg/g and 0.7954 mg/g, respectively.
Effectiveness of Biochar from Kapok Fruit Peel (Ceiba pentandra) for Decolorization of Indigosol Blue in Water Putra, Iim E.; Napitupulu, Mery; Walanda, Daud K.; Rahmawati, Sitti
Jurnal Akademika Kimia Vol. 14 No. 4 (2025)
Publisher : Universitas Tadulako

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

Abstract

In the batik industry, synthetic dyes such as indigosol blue are more commonly used than natural dyes. However, water pollution resulting from the batik industry is a serious issue that can threaten water quality and be harmful to human health. This research uses the adsorption method with kapok fruit peel as the adsorbent to address the problem of Indigosol blue dye. The kapok fruit peel is pyrolyzed at temperatures of 400 °C, 450 °C, and 500 °C. This study aims to determine the effectiveness of kapok fruit peel biochar in the adsorption of indigosol blue dye with variations in weight, time, and pH. The results show that the characteristics of kapok fruit shell biochar include moisture content at temperatures of 400 °C, 450 °C, and 500 °C, which are 7.40 %, 6.40 %, and 5.20 %, respectively. The ash content of kapok fruit shell biochar at temperatures of 400 °C, 450 °C, and 500 °C was 8.70 %, 6.10 %, and 5.40 %, respectively. The maximum weight of kapok fruit shell biochar in absorbingindigosol blue dye was 75 mg with an adsorption capacity of 0.986 mg/g. The maximum contact time required was 40 minutes with an adsorption capacity of 0.626 mg/g. The maximum pH of indigosol blue dye in the adsorption process occurred at pH 7 with an adsorption capacity of 1.709 mg/g. These findings indicate that kapok fruit shell biochar has potential as an environmentally friendly alternative adsorbent for treating batik industry wastewater.
Utilisation of Biochar from Kapok Randu (Ceiba pentandra) Branches for Decolourisation of Remazol Red in Water Dasi, Alfina D. A.; Napitupulu, Mery; Walanda, Daud K.; Rahmawati, Sitti
Jurnal Akademika Kimia Vol. 15 No. 1 (2026)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2026.v15.i1.pp1-8

Abstract

Synthetic dyes such as remazol red are commonly used in the batik process, but their residual waste is a major contributor to water pollution. These effluents can degrade water quality, damage aquatic ecosystems, and pose health risks to humans. This research aims to reduce these problems by using an adsorption method that utilises kapok randu branch as an adsorbent for remazol red dye. Kapok randu branches were pyrolysed at temperatures of 400 °C, 450 °C, and 500 °C. This study aims to measure the ability of biochar from kapok randu branches to adsorb remazol red dye under varying weight, time, and pH conditions. The results showed the characteristics of kapok randu branches biochar include moisture content of 400 °C, 450 °C and 500 °C biochar of kapok randu branches of 5.56 %, 5.01 % and 4.80 %, respectively. The ash content of the 400 °C, 450 °C, and 500 °C kapok randu branch biochar was 5.68 %, 6.66 %, and 7.24 %, respectively. The maximum weight of kapok randu branch biochar in adsorbing remazol red dye is 25 mg with an adsorption capacity of 0.312 mg/g. The maximum contact time required was 60 minutes with an adsorption capacity of 1.004 mg/g. The maximum pH for the remazol red dye during the adsorption process was at pH 4, with an adsorption capacity of 5.816 mg/g.
Psychometric Evaluation of Culturally Responsive Numeracy and Problem-Solving Assessment: A Rasch Modeling Approach Suciati, Indah; Walanda, Daud Karel; Idris, Mustamin; Napitupulu, Mery; Anggraini, Anggraini; Lefrida, Rita; Walanda, Richard Albert
Jurnal Pendidikan MIPA Vol 27, No 1 (2026): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpmipa.v27i1.pp357-382

Abstract

The quality of measurement in educational research is highly dependent on the validity and reliability of the instruments used. However, in practice, many numeracy literacy and problem-solving instruments have not undergone adequate psychometric testing, particularly those that use cultural contexts as question stimuli. This study aims to develop and evaluate instruments for numeracy literacy and problem-solving in sequences and series, grounded in cultural context/local wisdom, using a research and development approach and Rasch modeling. The instrument's content validity was assessed through expert review by learning evaluation experts, mathematics education lecturers, and cultural experts (traditional councils). The analysis was conducted using the average validator score, Aiken's V coefficient, and percentage agreement to ensure the appropriateness of the substance, clarity of language, instrument appearance, and the appropriate integration of cultural context. Empirical trials were conducted in small groups with 71 high school students in grade X with 15-17 years in three regions in Indonesia: Palu City, Donggala Regency, and Sigi Regency, who were selected purposively. The test data were analyzed using Rasch modeling to evaluate item suitability, difficulty level, reliability, separation index, unidimensionality, and potential bias through DIF analysis. The analysis results showed that the developed instrument had very high content validity, strong person and item reliability, and that most items fit the Rasch model. However, the distribution of item difficulty did not fully cover the extreme range of respondents' abilities, and indications of DIF were found in some items in one area, indicating the need for further refinement. Thus, the developed numeracy literacy and problem-solving instrument was deemed suitable based on initial findings at the development stage; however, it still requires further revision and testing before being widely used in a more diverse population. Keywords: numeracy literacy, problem-solving, rasch model, reliability, validity.
Co-Authors Afadil Alam Anshary Almahdali, Khafifah Anang Wahid M.Diah Anggraini Anggraini Anggraini, Windi Areeya Milehman Arwansyah Arwansyah Bau Ratu Budi Rahayu, Budi Cresna, Cresna Dasi, Alfina D. A. Daud Karel Walanda Delviana Melego Detris Poba Dwijogo, Wasis D Enar, Rohmala Ersa W. Lakukua Galib, Stefhanny Ginting, Dewi Gleryl F. Novemly Hajerina, Hajerina Hutagaol, Jhon I Komang Jati Purnawan I Nengah Kundera I W. A. Wirawan Ijirana Iriani, Fitri Irwan Irwan Jamaludin M Sakung Kesumasari, Ni Made Kusuma, I Gede Yoga Nata Leonardo Leonardo Lis K. Djaledje Lumbantobing, Ria M., Erni Madjid, Nurhidayah Abd. Marungkil Pasaribu Masriana Masriana, Masriana Mesakh, Eka Putra Minarni Rama Jura Minarni Rama Jura Miryam B. Kalase Muhammad Agus Muljanto MUHAMMAD ALI MUSTAMIN IDRIS Napitupulu, Nurasyah D Nurasyah Dewi Napitupulu Nurdin Rahman Nurhikma, Nurhikma Nuriadi, Nuriadi Parwati, Ni Kadek Fina Poba, Detris Podala, Katherina Pongenda, Rudy Christiyanto Punaji Setyosari Purnama Ningsih Putra, Iim E. Ratman Ratman Ratman Razni, Razni Reny, Reny Ria Lumbantobing Rita Lefrida Ryka Marina Walanda Setiawan, I Ketut Ardi Siang Tandi Gonggo Siti Fathonah Septianingsih Siti Nuryanti Sitti Rahmawati Situngkir, Risma U Solika, Nafikatus Sri Hastuti Virgianti Pulukadang Sri Mulyani Sabang Suciati, Indah Susilawati, Niluh Eka Tahril Taslima Tiara Maharani, Tiara Walanda, Richard Albert Walanda, Ryka M Walanda, Ryka M. Zarnila, Zarnila Zita L. Sarungallo