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All Journal Jurnal Pendidikan Biologi Indonesia Elkawnie Jurnal Penelitian Pendidikan IPA (JPPIPA) EKSAKTA : Jurnal Penelitian dan Pembelajaran MIPA PeTeKa NUSANTARA : Jurnal Ilmu Pengetahuan Sosial Agrienvi : Jurnal Ilmu Pertanian Optika : Jurnal Pendidikan Fisika Jurnal Pijar MIPA Marpokat: Jurnal Pengabdian Kepada Masyarakat
Nasirsah
Universitas Muhammadiyah Tapanuli Selatan
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics

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KEMAMPUAN ANALISIS MAHASISWA PADA MATERI PERKULIAHAN Safri Hasibuan, Iskandar; Nasirsah, Nasirsah; Darwis, Muhammad; Aritonang, Syahruddin
NUSANTARA : Jurnal Ilmu Pengetahuan Sosial Vol 11, No 8 (2024): NUSANTARA : Jurnal Ilmu Pengetahuan Sosial
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jips.v11i8.2024.3391-3398

Abstract

Kemampuan analisis mahasiswa menjadi tujuan penelitian ini yang perlakuannya dilaksanakan pada setiap tatap muka. Dalam tatap muka ini kemampuan analisis mahasiswa di ukur dengan memberikan opsi berupa: kemampuan menganalisis materi, memaparkan serta dialog setiap tatap muka, setelah setiap pemateri mempresentasikan makalahnya. Metode yang digunakan untuk mendapatkan hasil kemampuan analisis menggunakan skala menurut Saifuddin Azwar. Adapun hasi penelitian yaitu pada kemampuan analisis makalah didapatkan hasil dengan kategori Sangat Rendah sebanyak 6 mahasiswa dengan persentase 42, 86 %, untuk kemampuan analisis pemaparan pada kategori sedang, yaitu sebesar 50 %, pada kemampuan analisis kategori dialog masih sangat rendah karena ditemukan persentasenya sebesar 64,29 %. Dari ketiga kemampuan analisis yang didapatkan disimpulkan bahwa kemampuan analisis mahasiswa sangat rendah. Untuk selanjutnya perlu diberikan masukan dan penambahan dalam hal-hal tertentu untuk meningkatkan kemampuan analisis mahasiswa.
Exploration of Salam Leaf Extract (Syzygium polyanthum) as a Natural Indicator for Acid-Base Titration: Color Stability and Endpoint Accuracy Nasirsah, Nasirsah; Fatma, Fatma Suryani Harahap; Siregar, Rabiyatul Adawiyah; Siregar, Elda Sari; Tuah, Sahlan
Jurnal Pijar Mipa Vol. 20 No. 7 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i7.10547

Abstract

Acid-base indicators play an important role in titration, but the use of synthetic indicators such as phenolphthalein is increasingly criticized for being toxic, carcinogenic, and environmentally unfriendly. Therefore, this study was conducted with the aim of developing bay leaf extract (Syzygium polyanthum) as a safer, natural indicator, thereby supporting the concept of green chemistry. The study was carried out in four stages, namely first, extraction with ethanol: water solvent (70:30 and 50:50), second, color change test in pH 4, 7, and 10 buffer solutions using visual documentation and UV-Vis spectrophotometry. Third, validation of effectiveness in HCl–NaOH titration with phenolphthalein as a comparator. Additionally, stability and reproducibility tests were conducted over a 7-day storage period. The results showed that bay leaf extract remained stable for at least seven days, exhibiting a significant λmax change profile at 405–425 nm, which varied according to pH changes. This indicates the sensitivity of phenolic pigments to acidic, neutral, and basic conditions. In titration validation, the extract with 50/50 solvent showed an identical titrant volume to phenolphthalein (25.0 mL; deviation 0%), while the 70/30 solvent showed a deviation of -14.6%. Stability tests showed that the extract was relatively stable for up to 7 days in dark conditions with a decrease in absorbance <10%, while reproducibility tests produced inter-user variations <5%. These findings suggest that bay leaf extract has strong potential as a reliable, stable, and consistent natural indicator, making it a worthy alternative to synthetic indicators in environmentally sustainable chemistry education and research laboratories.
Morphological Characterization and Nutritional Evaluation of Sidimpuan Salak (Salacca sumatrana Becc) Based on Flesh Color Yusnita Wahyuni Silitonga; Irmalia Fitri Siregar; Nasirsah; Nurmaini Ginting; Muhammad Nizar Hanafiah Nasution
Jurnal Penelitian Pendidikan IPA Vol 11 No 8 (2025): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i8.12496

Abstract

Salak is a native Indonesian plant with various cultivars, one of which is the Sidimpuan salak originating from North Sumatra. Sidimpuan salak fruit has a distinctive taste, namely a fairly sweet but slightly sour taste, sticky, astringent, quite highs water content in the fruit, and various colors of the fruit flesh, namely white, red, and red tinge. This study aims to characterize the morphology of three types of Sidimpuan salak based on the color of the fruit flesh (white, red, red tinge) and compare the glucose content and vitamin C levels of the three types of salak. The method used in this study is a descriptive method and sample determination is done by purposive sampling. Glucose levels are analyzed using a UV-Vis spectrophotometer and vitamin C levels by the idiometry titration method. The results of the study showed that there are differences in morphological appearance between white, red, and red tinge salak. The morphological characteristics of the stems and leaves of red salak rank first, but the size and taste of white salak fruit are superior to red salak. The highest glucose levels were found in white snake fruit samples and the lowest in red snake fruit, while the highest vitamin C levels were found in red snake fruit and the lowest in red snake fruit. Variations in morphology, glucose content, and vitamin C in snake fruit are caused by genetic and environmental factors. The morphological and nutritional differences found in the three types of Sidimpuan snake fruit are predominantly due to genetic factors because the samples were obtained from the same environmental conditions.
Worldwide trends of ICT integration in ecology higher education: A bibliometric analysis of Scopus Muhammad Darwis; L. Lufri; I Made Arnawa; N. Nasirsah; Eka Nurwani Ritonga
JPBI (Jurnal Pendidikan Biologi Indonesia) Vol. 11 No. 3 (2025): NOVEMBER
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jpbi.v11i3.42020

Abstract

The integration of information and communication technology (ICT) in ecology teaching and learning in higher education is increasingly important to support pedagogical innovation and achieve the Sustainable Development Goals. This study addresses the gap in existing literature, as no comprehensive bibliometric mapping has been conducted to date on ICT integration in ecology learning, despite the growing attention in environmental and digital education. This study maps global trends in ICT integration in ecology learning through a bibliometric analysis of published articles indexed in Scopus. Data was obtained using a structured query filtered by English-language journal articles, final publication stage, and all open access statuses. The search process followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) process. Unlike previous thematic or case-based reviews, this study applies bibliometric techniques to identify knowledge networks, key research clusters, and emerging directions. The analysis used the analyze results menu in Scopus subscriptions, VOSviewer, and Biblioshiny (Bibliometrix-R) to identify general publication characteristics, knowledge maps, and topic trends. The results show Spain, China, and Australia as the leading countries, with ecology, teaching, and learning as dominant keywords. New research themes—particularly digital inclusion and ICT for sustainability—are identified as emerging drivers in the field. These findings emphasize the importance of international collaboration, the application of cutting-edge technology, and pedagogical innovation to achieve the SDGs through learning. Practically, the study provides valuable insights for lecturers, curriculum developers, and policymakers to design ICT-based ecology education that is innovative, inclusive, and aligned with sustainability goals.
IDENTIFIKASI DEVISI BRYOPHYTA DAN TUMBUHAN BUNGA BERBUNGA DI KEBUN RAYA SIPIROK TAPANULI SELATAN Iskandar Safri Hasibuan; Syahruddin Syahruddin; Nasirsah Nasirsah
PeTeKa (Jurnal Penelitian Tindakan Kelas dan Pengembangan Pembelajaran) Vol 9, No 1 (2026): PeTeKa (Jurnal Penelitian Tindakan Kelas dan Pengembangan Pembelajaran)
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/ptk.v9i1.189-193

Abstract

Penelitian ini bertujuan untuk mengidentifikasi tumbuhan pada devisi Bryophyta dan tumbuhan bunga-berbunga di kebun Raya Sipirok Tapanuli Selatan. Metode yang digunakan yaitu metode direct observation (pengamatan langsung) di lapangan. Pengamatan langsung dengan menggunakan lembar observasi yang telah disiapkan yang memuat berbagai item seperti media tumbuh dan karakteristik dari tumbuhan yang diamati untuk Bryophita sedangkan untuk tumbuhan bunga-berbunga mengenal dan menghitung jumlah species dan juga untuk mengetahui bagian-bagian bunga yaitu: kalix (kelopak), corolla (mahkota), androecium (benang-benang sari), dan ginaecium (daun-daun buah). Setelah mendapatkan subject penelitan Selanjutnya di total. Dengan diadakannya penelitan ini diharapkan Masyarakat mengetahui jenis tumbuhan bryophyta dan tumbuhan bunga-berbunga di Kebun Raya Sipirok Tapanuli Selatan
Graft Copolymerization of Natural Rubber With Functionalized Glycidyl Methacrylate Via Thermal and Free Radical Initiation: Effect of Processing Temperatures and Times Nasirsah Nasirsah; Fatma Suryani Harahap; Muhammad Darwis; Iskandar Safri Hasibuan; Syahruddin Aritonang
Elkawnie Vol. 11 No. 1 (2025)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v11i1.23784

Abstract

Abstract: As an unsaturated elastomer, the natural rubber (NR) is difficult to maintain adhesivity with the other additive materials, limiting their use during the process of manufacturing. Therefore, it is necessary to modify the surface to improve thermal and oxidative resistance. This study aims to modify the natural rubber through a functionalization of glycidyl methacrylate (GMA) and its effect on temperatures and times during processing. Functionalization of NR was carried out via free radical initiation by varying the working times and temperatures. Characterizations via FTIR were performed to confirm the functional groups of NR and functionalized NR, while the analysis of grafting was carried out to describe the propose proposed reaction mechanisms. FTIR spectra confirmed the presence of functional groups contributing to NR including stretching O-H of peptide group (3285 cm-1), stretching and absorption of CH3 (respectively 2725 cm-1 and 1456 cm-1), and functionalized GMA were observed after functionalization (1730 cm-1). Working times and temperatures allowed the GMA to disperse evenly, resulting higher chance of homo-polymerisation via crosslinking of poly-GMA, optimum at 160-190oC. In conclusion, the thermal initiation process at the optimum temperature allows the maximum grafting degree of GMA on NR, reaching up to 80% at 170°C, and results in a much more stable reaction through free radical initiation. Abstrak: Sebagai salah satu elastomer tak jenuh, karet alam (NR) terbatas dalam menjaga kemampuan daya rekatnya dengan bahan aditif lain, sehingga membatasi penggunaan praktisnya dalam proses manufaktur. Oleh karena itu, diperlukan modifikasi khususnya di permukaan untuk meningkatkan ketahanan terhadap panas dan oksidasi. Penelitian ini bertujuan untuk memodifikasi NR melalui fungsionalisasi clycidyl metacrylate (GMA) dan mengkaji pengaruh suhu dan waktu selama proses fungsionalisasi berlangsung. Fungsionalisasi NR diinisiasi melalui radikal bebas dengan variasi waktu dan suhu reaksi. Karakterisasi menggunakan FTIR dilakukan untuk mengkonfirmasi keberadaan gugus fungsi pada NR dan NR-terfungsionalisasi, sedangkan analisis grafting dilakukan untuk menjelaskan mekanisme reaksi yang diusulkan. Spektra FTIR menunjukkan adanya gugus fungsi pada NR berupa regangan O–H (3285 cm⁻¹), regangan dan serapan CH₃ (masing-masing pada 2725 cm⁻¹ dan 1456 cm⁻¹), serta munculnya puncak khas GMA-terfungsionalisasi pada 1730 cm⁻¹. Variasi waktu dan suhu reaksi memungkinkan terjadinya dispersi GMA yang lebih merata, meningkatkan peluang terjadinya homopolimerisasi melalui ikatan silang poli-GMA, pada suhu 160–190°C. Secara keseluruhan, proses inisiasi termal pada suhu optimum menghasilkan derajat grafting maksimum GMA pada NR hingga 80% pada 170°C, serta menghasilkan reaksi yang lebih stabil melalui mekanisme inisiasi radikal bebas.  
Co-Authors Adelina, Putri Azizah Lubis, Jalilah Eka Nurwani Ritonga Elda Sari Siregar Elisa Elisa Elisa Elisa Fatma Suryani Fatma Suryani Harahap Fatma, Fatma Suryani Harahap Fitriani Fitriani Fitriani Fitriani Hanafiah Nasution, Muhammad Nizar Hasibuan, Iskandar Safri Heni Mulyani Pohan I Made Arnawa Iskandar Safri Hasibuan Iskandar Safri Hasibuan Iskandar Safri Hasibuan Jalilah Azizah Lubis L. Lufri Luky Wahyu Sipahutar Maya Sari, Eny Muh. Darwis Muhammad Darwis Muhammad Darwis Muhammad Darwis Muhammad Rusdi Mukhlis Mukhlis Nirgahayu Siregar Nurmaini Ginting Rabiyatul Adawiyah Siregar Riski Baroroh Rizky Ariaji, Rizky Safri Hasibuan, Iskandar Sahlan Tuah Salih Angraini Siregar Samsinar Harahap Silitonga, Yusnita Wahyuni Siregar, Irmalia Fitri Siregar, Nirgahayu Sofyan Samosir, Benny Syah Pulungan, Darman Syahruddin Aritonang Syahruddin Aritonang Syahruddin Syahruddin Wiwik Handayani