Garuda - Garba Rujukan Digital

PEMBELAJARAN BERBASIS MASALAH (PROBLEM BASED LEARNING) SECARA ONLINE SELAMA PANDEMI COVID-19 Rombe, Yunita Pare; -, Murtihapsari Murtihapsari; Alberta, Fitria; -, Radite Yogaswara; Surbakti, Putri Sarera
Jurnal Pendidikan Kimia Undiksha Vol 5, No 2 (2021)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jjpk.v5i2.38402

Pandemi COVID-19 menyebabkan semua elemen penggerak pendidikan meliputi guru, peserta didik dan pemerintah mengalami kesulitan untuk memaksimalkan proses pemebelajaran di kelas. Penelitian ini bertujuan untuk menganalisis pembelajaran berbasis masalah (Problem Based Learning) secara online selama pandemic Covid-19. Jenis penelitian ini merupakan penelitian literature. Penelitian ini dikaji dari berbagai artikel dari penelitian sebelumnya yang telah terpublikasi nasional pada jurnal ilmiah terakreditasi. Instrumen pada ulasan ini berupa 26 artikel- artikel yang memiliki tema yang relevan kemudian dikumpulkan, lalu dipilah sesuai kriteria yang ditetapkan. Selanjutnya teknik pengumpulan artikel-artikel pada ulasan ini dikaji berdasarkan kriteria: (1) penelitian eksperimen atau pre eksperimen, penelitian tindakan kelas, penelitian kuantitatif, (2) subjek penelitian melibatkan peserta didik MIPA SMA/MA/SMK. Teknik analisis kajian terhadap data dengan cara mendeskripsikan secara singkat hasil penelitian dari artikel-artikel tersebut, selanjutnya ditarik simpulan. Hasil penelitian menunjukkan model pembelajaran Problem Based Learning menggunakan dapat mendukung proses berlangsungnya pembelajaran dengan baik dan dapat mempermudah peserta didik serta guru dalam berinteraksi walaupun secara online. Maka, secara keseluruhan model pembelajaran problem based learning (PBL) memberikan pengaruh positif terhadap kegiatan pembelajaran. implikasi penelitian ini diharapkan dapat membantu siswa dalam memecahkan permasalahan selama pembelajaran online.

PENGARUH PERLAKUAN KOLKISIN PADA BENIH SENGON (Falcataria mollucana Miq.) Islam, Muhammad Fajar; Anwar, Arniana; Rombe, Yunita Pare
Agroplantae: Jurnal Ilmiah Terapan Budidaya dan Pengelolaan Tanaman Pertanian dan Perkebunan Vol 13 No 1 (2024): Agroplantae: Jurnal Ilmiah Terapan Budidaya dan Pengelolaan Tanaman Pertanian da
Publisher : Jurusan Budidaya Tanaman Perkebunan, Politeknik Pertanian Negeri Pangkajene Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51978/agro.v13i1.524

S Sengon (Falcataria moluccana Miq.) is a pioneer tree species that is widely developed in industrial plantation forests and community forests because of its fast growing species. The properties of sengon seeds which are classified as orthodox can decrease their viability and vigor during storage. The colchicine hormone is expected to increase the acceleration of plant growth so that it can increase the success of sengon seed growth. The aim of this research was to see the effect of colchicine treatment on the accelerated growth of sengon seeds. This research was carried out using a Completely Randomized Design (CRD) with one factor, namely colchicine concentration. The concentrations used are: 0 (control), 0.5 ppm, 1.0 ppm, 1.5 ppm, 2.0 ppm. The effect of the treatment was seen through variance testing using SAS 9.0 portable software. The variance results showed that soaking in colchicine solution had a very significant effect on the maximum growth potential, germination capacity and germination value, while the colchicine solution soaking treatment had no real effect on growth speed.

IDENTIFIKASI KANDUNGAN SENYAWA MERKURI (Hg) PADA KRIM PEMUTIH WAJAH YANG BEREDAR DI PASAR AMPARITA Lidiawati, Dewi; Mubarak, Syahrul; Yulan, Yulan; Rombe, Yunita Pare
Arfak Chem: Chemistry Education Journal Vol. 6 No. 2 (2023): Arfak Chem
Publisher : Universitas Papua, Manokwari, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/accej.v6i2.516

Logam merkuri (Hg) adalah salah satu bahan berbahaya yang diduga terkadung didalam beberapa jenis kosmestik, yang dapat menimbulkan kerusakan pada organ tubuh jika digunakan dalam jangka panjang dan juga dapat bersifat toksik. Krim pemutih yang tidak terdaftar BPOM perlu diteliti kandungannya, karena krim tersebut banyak dijual bebas di pasaran, memiliki harga yang relatif jauh lebih murah, serta mudah diperoleh. Penelitian ini bertujuan untuk mengetahui adanya kandunngan senyawa merkuri pada krim pemutih yang beredar di pasar Amparita yang di uji dengan dengan metode reaksi reduksi oksidasi menggunakan pelarut spesifik, berdasarkan penelitian yang telah dilakukan diperoleh dari 8 sampel krim pemutih wajah 7 sampel diantaranya diduga positif mengandung merkuri dan 1 sampel diantaranya negatif mengandung merkuri. Hasil ini didapatkan dari pengujian dengan menggunakan pelarut spesifik yaitu KI yang ditandai dengan adanya endapan berwarna merah/jingga, untuk pelarut NaOH ditandai dengan adanya endapan kuning pada sampel dan untuk pelarut SnCl2 dan HCl ditandai dengan adanya endapan erwarnah putih pada sampel.

Kajian: Pengaruh Model Pembelajaran Discovery Learning Terhadap Hasil Belajar Peserta Didik Pada Mata Pelajaran Kimia ROMBE, YUNITA PARE; Murtihapsari; Mulianti
Jurnal Pendidikan Kimia Undiksha Vol. 7 No. 2 (2023)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jjpk.v7i2.59014

Abstrak Pendidikan di indonesia saat ini lebih menitikberatkan pada hasil belajar peserta didik. Model pembelajaran yang diterapkan guru dalam proses pembelajaran dalam kelas berpengaruh terhadap hasil belajar peserta didik. Di Indonesia sendiri terdapat berbagai model pembelajaran dengan berbagai keunggulan dan kekurangan, salah satunya model pembelajaran inovatif seperti Discovery Learning. Tujuan dari kajian pustaka ini mengulas pengaruh penggunaan model Discovery Learning terhadap hasil belajar peserta didik. Teknik pengumpulan data pada ulasan ini dikaji berdasarkan fokus model pembelajaran dengan mendeskripsikan secara singkat artikel tersebut kemudian ditarik kesimpulan. Jadi metode pada kajian ini, lebih ditekankan studi terpenting dan terkini dari literatur yang membahas model Discovery Learning. Proses pembelajaran dapat dipengaruhi oleh berbagai faktor, antara lain cara belajar, guru, kurikulum, metode, model dan pendekatan yang digunakan selama proses pembelajaran. Hasil kajian beberapa literatur diperoleh data bahwa model Discovery Learning dapat meningkatkan hasil belajar melalui keaktifan peserta didik dalam proses pembelajaran yang berdampak positif terhadap hasil belajar peserta didik. Kata kunci: Discovery Learning, Hasil Belajar, Guru, Peserta didik

PROPAGASI IN VITRO Dendrobium macrophyllum DI BERBAGAI MEDIA PERTUMBUHAN Worabay, Descarlo; Anwar, Arniana; Ariyani, Luh; Tanur, Evelin Anggelina; Rombe, Yunita Pare
Agroplantae: Jurnal Ilmiah Terapan Budidaya dan Pengelolaan Tanaman Pertanian dan Perkebunan Vol 14 No 1 (2025): Agroplantae: Jurnal Ilmiah Terapan Budidaya dan Pengelolaan Tanaman Pertanian da
Publisher : Jurusan Budidaya Tanaman Perkebunan, Politeknik Pertanian Negeri Pangkajene Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51978/agro.v14i1.948

Dendrobium macrophyllum adalah salah satu spesies anggrek yang berasal dari keluarga Orchidaceae Penelitian ini bertujuan untuk mengeksplorasi pengaruh berbagai media pertumbuhan terhadap pertumbuhan eksplan D. macrophyllumdalam kultur in vitro. Empat media yang diuji meliputi MS (Murashige dan Skoog), ND (Nutrient Medium), NDM (New Doughasima Medium), dan NDMP (New Doughasima Medium Plus). Hasil analisis ANOVA menunjukkan bahwa media NDMP memberikan hasil terbaik dalam peningkatan jumlah tunas, pertambahan akar dan pertambahan tinggi. Hal ini menandakan perbedaan signifikan antara perlakuan media. Media NDMP, yang mengandung media dasar NDM diperkaya dengan ZPT berupa BA dan NAA sebagai auksin serta Kinetin sebagai sitokinin, mampu memicu pembelahan sel yang lebih tinggi, sedangkan media MS dan ND menunjukkan hasil yang kurang optimal. Penelitian ini menegaskan pentingnya pemilihan media pertumbuhan yang tepat untuk propagasi in vitro D.macrophyllum, yang dapat meningkatkan efisiensi dan produktivitas dalam budidaya anggrek. Hasil ini diharapkan dapat memberikan panduan bagi praktisi hortikultura dalam memilih media kultur yang sesuai untuk perbanyakan tanaman anggrek secara efektif.

ADSORPTION KINETICS OF METHYL ORANGE ON SILICA DERIVED FROM GAMALAMA VOLCANIC SOIL Cipta, Indra; Baturante, Nur Jannah; Hernawan, Hernawan; Rombe, Yunita Pare; Mahmudha, Siti
Walisongo Journal of Chemistry Vol. 8 No. 1 (2025): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v8i1.26066

Silica gel was successfully synthesized from Gamalama volcanic soil using the sol-gel method and applied as an adsorbent to remove methyl orange (MO) dye. The synthesis process involved treating 20 grams of volcanic soil with 2 M HCl under stirring for 3 hours, followed by a 12-hour soaking period. The solid residue was subsequently filtered, dried, and reacted with 7 M NaOH for 2 hours. The resulting filtrate was neutralized through repeated washing with distilled water, and silica gel formation was achieved by titration with 2 M HCl until a final pH of approximately 3–4 was reached. The synthesized silica was evaluated for its adsorption performance against methyl orange, with optimal conditions identified at pH 4, a contact time of 5 hours, and an adsorbent dosage of 30 mg. UV-Vis analysis showed that the synthesized silica exhibited a higher adsorption capacity (6.7%) compared to raw Gamalama volcanic soil. Kinetic studies indicated that the adsorption process followed a pseudo-second-order model, suggesting chemisorption as the dominant mechanism. The rate constant (k₂) for the synthesized silica was 0.09 M⁻¹·h⁻¹, compared to 0.077 M⁻¹·h⁻¹ for the raw volcanic soil. This indicates that the synthesized silica adsorbed MO more rapidly, likely due to its higher purity and greater availability of active sites. The slightly lower k₂ observed in raw volcanic soil might be attributed to the presence of clay minerals such as halloysite and allophane, which possess negative surface charges at neutral to alkaline pH levels, leading to electrostatic repulsion with the negatively charged MO anions. Silica gel synthesized from Gamalama volcanic soil demonstrates promising potential as an eco-friendly adsorbent for dye removal from aqueous solutions.

ADSORPTION KINETICS OF METHYL ORANGE ON SILICA DERIVED FROM GAMALAMA VOLCANIC SOIL Cipta, Indra; Baturante, Nur Jannah; Hernawan, Hernawan; Rombe, Yunita Pare; Mahmudha, Siti
Walisongo Journal of Chemistry Vol. 8 No. 1 (2025): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v8i1.26066

Silica gel was successfully synthesized from Gamalama volcanic soil using the sol-gel method and applied as an adsorbent to remove methyl orange (MO) dye. The synthesis process involved treating 20 grams of volcanic soil with 2 M HCl under stirring for 3 hours, followed by a 12-hour soaking period. The solid residue was subsequently filtered, dried, and reacted with 7 M NaOH for 2 hours. The resulting filtrate was neutralized through repeated washing with distilled water, and silica gel formation was achieved by titration with 2 M HCl until a final pH of approximately 3–4 was reached. The synthesized silica was evaluated for its adsorption performance against methyl orange, with optimal conditions identified at pH 4, a contact time of 5 hours, and an adsorbent dosage of 30 mg. UV-Vis analysis showed that the synthesized silica exhibited a higher adsorption capacity (6.7%) compared to raw Gamalama volcanic soil. Kinetic studies indicated that the adsorption process followed a pseudo-second-order model, suggesting chemisorption as the dominant mechanism. The rate constant (k₂) for the synthesized silica was 0.09 M⁻¹·h⁻¹, compared to 0.077 M⁻¹·h⁻¹ for the raw volcanic soil. This indicates that the synthesized silica adsorbed MO more rapidly, likely due to its higher purity and greater availability of active sites. The slightly lower k₂ observed in raw volcanic soil might be attributed to the presence of clay minerals such as halloysite and allophane, which possess negative surface charges at neutral to alkaline pH levels, leading to electrostatic repulsion with the negatively charged MO anions. Silica gel synthesized from Gamalama volcanic soil demonstrates promising potential as an eco-friendly adsorbent for dye removal from aqueous solutions.

Activated Carbon from Mulu Bebe Stem Waste for Methylene Blue (MB) Adsorption Cipta, Indra; Baturante, Nur Jannah; Zam Zam, Zulkifli; Pasimanyeku, Angela; Rombe, Yunita Pare
TECHNO: JURNAL PENELITIAN Vol 13, No 1 (2024): TECHNO JURNAL PENELITIAN
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v13i1.6862

Methylene blue is a harmful synthetic dye waste component that poses a significant threat to the environment and human health if not disposed of properly. The best way to tackle this problem is by adsorption through activated carbon from Mulu Bebe banana stems, which are widely available in North Maluku. This agricultural waste can be used to produce activated carbon through pyrolysis at 500ËšC for 30 minutes and activation using 0.5 M KOH solution for 24 hours. The activated carbon is then characterized using FTIR, SEM and XRD, which reveal the presence of various functional groups and pores. The XRD results indicate that the activated carbon structure tends to be amorphous. The adsorption analysis shows that the activated carbon from Mulu Bebe banana stems has a high adsorption capacity of 12.4 mg/g at the optimum condition of pH 7, contact time of 30 minutes, and initial concentration of 50 ppm. The Langmuir and Freundlich equations provide the best fit for the equilibrium adsorption data. By using activated carbon from Mulu Bebe banana stems, we can effectively reduce the amount of methylene blue waste in the environment and protect the ecosystem and human health.

Title

Found 8 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 8 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 8 Documents
Search