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All Journal EduChemia: Jurnal Kimia dan Pendidikan Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis BERNAS: Jurnal Pengabdian Kepada Masyarakat Jurnal Pemberdayaan: Publikasi Hasil Pengabdian kepada Masyarakat (JPM ITTC )
Dewi Kurnianingsih Arum Kusumahastuti
Universitas Kristen Satya Wacana
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Neuroscience Nursing Physics Public Health Social Sciences Veterinary Other

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Optimasi Sintesis Biomaterial Perak-Porfirin dari Kerabang Telur Puyuh Dewi Kurnianingsih Arum Kusuma Hastuti; Cucun Alep Riyanto
EduChemia (Jurnal Kimia dan Pendidikan) Vol 4, No 1 (2019)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (710.257 KB) | DOI: 10.30870/educhemia.v4i1.2404

Abstract

Porfirin merupakan pigmen warna alami khas yang terdapat dalam kulit telur puyuh. Tujuan dari penelitian ini adalah untuk menentukan waktu dan suhu optimum dalam pembentukan biomaterial. Pelarut yang digunakan untuk ekstraksi adalah metanol:HCl (2:1, v/v) selama 12 jam. Hasil biosintesis yang terbentuk, kemudian dianalisa dengan spektrofotometer UV-VIS. Sebagai hasilnya, kompleksasi optimal antara porfirin dengan ion Ag+ terlihat pada panjang gelombang 845 nm yaitu pada waktu 5,62 jam; rasio 1:2.20, dan suhu sebesar 30°C. Hal tersebut diperoleh berdasarkan persamaan Response Surface Method Y = -17.95+0,63X1+13.26X2+0.88X3-3.7x10-3X2X32-0,46X1X3+0,04X22X3-0,08X12-1,87X22-9,68x10-3X32.
Optimasi Ekstraksi Protoporphyrin-IX dari Kerabang Telur Puyuh (Coturnix Coturnix L.) Harry Setiawan; Cucun Alep Riyanto; Dewi K.A.K. Hastuti; Yohanes Martono
EduChemia (Jurnal Kimia dan Pendidikan) Vol 3, No 1 (2018)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1463.48 KB) | DOI: 10.30870/educhemia.v3i1.1614

Abstract

Industri tekstil banyak menggunakan pewarna sintetik karena mudah dalam pewarnaan dan murah, tetapi memiliki dampak yang buruk bagi lingkungan sekitar. Kesadaran akan pentingnya menjaga lingkungan membuat peusahaan tekstil mencoba kembali menggunakan pewarna alami. Kerabang telur puyuh memiliki protoporphyrin IX yang dapat digunakan sebagai pewarna. Kondisi optimum ekstraksi protoporphyrin IX dari kerabang telur puyuh perlu diteliti lebih lagi ditinjau dari komposisi pelarut, metode, dan siklus ekstraksi. Kerabang telur puyuh dikeringkan kemudian diekstraksi menggunakan pelarut metanol 96% dan HCl  (v/v) (HCl(p) dan HCl 5%, v/v) dengan metode maserasi dan ultrasonik. Siklus ekstraksi dioptimalkan dengan variasi hingga 5 siklus. Penetapan kadar protoporphyrin dilakukan  dengan menggunakan spektroskopi UV-VIS berdasarkan persamaan Lambert-Beer. Ekstrak difraksinasi menggunakan klorofom dengan rasio 1 : 2 v/v (klorofom : ekstrak). Fase organik dipindai dengan menggunakan spektrofotometer UV-Vis. Hasil penelitian menunjukkan bahwa ekstrak kerabang telur puyuh mengandung protoporphyrin IX, terlihat dari hasil spektra yang cocok dengan spektra protoporphyrin standard. Kondisi ekstraksi protoporphyrin yang optimum didapatkan dengan menggunakan pelarut metanol 96% dan HCl(p) 5% (v/v) secara maserasi. Siklus ekstraksi protoporphyrin yang optimal adalah 3 siklus dengan kadar protoporphyrin dalam ekstrak adalah 1,92 ×10-2 % b/b.
Valorization of Rambutan Peel as Adsorbent for Tempeh Wastewater Dewi Kurnianingsih Arum Kusumahastuti; Rindang A Laksono; Ronal F Hindra
Jurnal Biologi Tropis Vol. 23 No. 2 (2023): April-June
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i2.4792

Abstract

Tempeh is one of Indonesia traditional foods which made from fermentation processed soybean. There is wastewater from tempeh production that usually wasted to the river without further treatment. One of the parameters for wastewater is chemical oxygen demand (COD). Higher COD correlated to the higher risk to the environment. To decrease the COD level of tempeh wastewater valorization rambutan peels as adsorbent was done. The adsorbent was prepared by drying up and powdering rambutan peels. Boehm titration was used to characterize some functional groups of rambutan peels. Optimization of the contact time and the acidity level (pH) was done under room temperature condition. As results, the rambutan peel contains carbocyclic (0,0492%), alkaline functional group (0,0360%), phenol (0,0004%) and lactone (0,0002%).  Besides, the optimal condition for the reaction were at pH 11 for 90 minutes that can reduce COD level from 23.840 mg/L to 10.230 mg/L.  
Menginisiasi Perubahan: Meningkatkan Kesadaran Siswa dalam Pengelolaan Sampah Dapur dan Plastik di SMA Kartika III-1 Banyubiru Kabupaten Semarang Margareta Novian Cahyanti; Sri Hartini; Dewi Kurnianingsih Arum Kusumahastuti; Alifia Dewi Safira; Pandu Krisnawan
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 1 (2024)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v5i1.7664

Abstract

Saat ini, tingkat kesadaran warga untuk membuang sampah pada tempatnya semakin tinggi. Kecepatan pengumpulan dan pengelolaannya tidak seimbang menyebabkan semakin besarnya volume sampah. Untuk dapat meningkatkan pengelolaan sampah, kesadaran produsen sampah tingkat rumah tangga untuk memulai pengelolaan sampah perlu dimunculkan. Penyadaran setiap anggota keluarga termasuk anak-anak untuk melakukan sortir sampah adalah langkah penting dalam upaya menjaga lingkungan dan menerapkan pengelolaan sampah yang berkelanjutan. Pengabdian pada masyarakat ini bertujuan untuk mengajak siswa untuk berpartisipasi aktif sebagai agen perubahan pengelolaan sampah khususnya siswa SMA Kartika III-1 Banyubiru. Kegiatan ini terdiri dari tahap persiapan, penyuluhan dan pameran dan diakhiri dengan tahap evaluasi. Kegiatan ini memberikan pengetahuan tentang bagaimana melakukan sortir sampah. Siswa mampu mempraktekkan sortir sampah. Siswa juga memperoleh pengetahuan tentang pemanfaatan sampah menjadi produk yang mempunyai nilai jual tinggi.
Physicochemical Properties of Yoghurt Analog from Peanut and Soy Milk Dewi Kurnianingsih Arum Kusumahastuti; Karina Bianca Lewerissa; Margareta Novian Cahyanti; Sri Hartini; Rifka Dwi Natalia; Yulia Frida Nugrahani
Jurnal Penelitian Pendidikan IPA Vol 11 No 2 (2025): February
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i2.10058

Abstract

The global demand for plant-based dairy alternatives is driven by health, environmental, and food allergy or intolerance concerns.  This movement has promoted plant-based yoghurts, which are nutrient-rich and non-dairy. This study examines the physicochemical and sensory characteristics of yogurts made from peanut milk and soy milk, both with and without the presence of filler, a prebiotic polysaccharide. Peanut milk yogurt exhibited a greater fat content of 11.2% wb, protein levels at 6.2% wb, and increased viscosity when compared to soy yogurt. However, soy yogurt exhibited elevated microbial loads (1.5 × 10¹¹ CFU/mL) and protein content when supplemented with inulin, suggesting improved fermentation activity. Both yogurts displayed pH levels appropriate for consumption (4.1–4.6), with peanut milk yogurt demonstrating a marginally higher acidity compared to soy yogurt. The addition of filler had a notable effect on the sensory profile, enhancing texture, taste, and overall acceptability for both peanut milk yogurt and soy yogurt. It is noteworthy that filler-enriched peanut milk yogurt exhibited diminished microbial loads and decreased viscosity, probably as a result of unutilized carbohydrate content and the presence of inhibitory metabolites from fermentation. Proximate analysis indicated that peanut milk yogurt has the potential to function as an effective plant-based yogurt alternative, exhibiting quality comparable to soy yogurt. Organoleptic testing revealed a clear consumer preference for formulations supplemented with inulin, resulting in ratings ranging from "like slightly" to "like extremely." This thorough examination offers significant perspectives on the possibilities of legume-based yogurts in addressing the increasing consumer interest in healthy, plant-derived dairy substitutes
Pelatihan Pembuatan Sabun Cair Ramah Lingkungan Untuk Peningkatan Ekonomi Kreatif Jemaat Sri Hartini; Dewi Kurnianingsih Arum Kusumahastuti; Margareta Novian Cahyanti; Sarawinda Hutagalung; Fajar Yusuf Arfiyan; Putra Kaysha Qodiriy; Olivier Surya Simonet; Fidelis Tertius Aluh Christyawardana; Firman Emmanuel Declarantius Parulian
Jurnal Pemberdayaan: Publikasi Hasil Pengabdian Kepada Masyarakat Vol. 5 No. 1 (2026): Januari - Juni
Publisher : CV. ITTC INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jpmittc.v5i1.4378

Abstract

The main problems faced by the congregation are limited entrepreneurial skills and the underutilization of creative economic opportunities based on environmentally friendly products, resulting in low additional household income. This community service program aims to improve the knowledge, skills, and economic independence of congregation members through training in the production of environmentally friendly liquid soap with market value. The program was conducted using a participatory training method, including counseling, demonstrations, and hands-on practice. Qualitative descriptive analysis was applied by comparing participants’ knowledge and skills before and after the training and evaluating the products produced. The results show an increase in participants’ understanding of materials and production processes, as well as their ability to produce liquid soap suitable for use and commercialization. Overall, the training has strong potential to support creative economic development and sustainably improve the welfare of the congregation. This initiative encourages long-term entrepreneurship and environmental awareness among participants.
From Biomass Waste to Functional Iron Oxides: Mechanistic Understanding, Structure Engineering, and Environmental Applications Dewi Kurnianingsih Arum Kusumahastuti; November R. Aminu; Agung R. Gintu; Emmanuel Hernanda Yustisia Susanto; Gecia Ovi Wulandari
Jurnal Penelitian Pendidikan IPA Vol 12 No 6 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i6.14780

Abstract

Biomass-mediated green synthesis of iron oxide nanomaterials has gained increasing attention as a sustainable alternative to conventional chemical methods, offering lower energy requirements, reduced chemical toxicity, and intrinsic surface functionalization. Unlike previous reviews that mainly summarize synthesis routes or environmental applications separately, this review establishes an integrated structure–property–performance framework to systematically correlate biomass chemistry, phase evolution, and functional remediation behavior of iron oxide nanomaterials. A structured scoping review was conducted by analyzing 42 peer-reviewed articles published between 2010 and 2024, selected from major scientific databases using predefined inclusion criteria emphasizing crystalline phase identification, quantitative structural characterization, and measurable environmental performance. Comparative synthesis of the collected data reveals that phytochemical constituents, particularly polyphenols and organic acids, regulate Fe³⁺ reduction, chelation equilibria, nucleation kinetics, and phase selectivity among Fe₃O₄, γ-Fe₂O₃, and α-Fe₂O₃. Fe₃O₄-rich systems exhibited smaller particle sizes (10–30 nm), higher saturation magnetization (30–70 emu g⁻¹), and superior pollutant removal efficiencies (90–99%), while γ-Fe₂O₃ showed moderate magnetic properties (20–50 emu g⁻¹) and α-Fe₂O₃ displayed larger particle sizes (30–60 nm), lower magnetization (<2 emu g⁻¹), but greater thermodynamic stability. Adsorption capacities ranged from 30–250 mg g⁻¹ depending on pollutant type and phase composition. Despite these promising performances, variability in biomass composition, phase instability, and inconsistent testing protocols remain major barriers to reproducibility and scalability. This review provides a quantitative and mechanistic framework to guide rational synthesis design, improve reproducibility, and accelerate scalable deployment of biomass-derived iron oxide nanomaterials for environmental remediation.
Co-Authors Agung R. Gintu Alifia Dewi Safira Cucun Alep Riyanto Emmanuel Hernanda Yustisia Susanto Fajar Yusuf Arfiyan Fidelis Tertius Aluh Christyawardana Firman Emmanuel Declarantius Parulian Gecia Ovi Wulandari Harry Setiawan Karina Bianca Lewerissa Margareta Novian Cahyanti Margareta Novian Cahyanti November R. Aminu Olivier Surya Simonet Pandu Krisnawan Putra Kaysha Qodiriy Rifka Dwi Natalia Rindang A Laksono Ronal F Hindra Sarawinda Hutagalung Sri Hartini Yohanes Martono Yulia Frida Nugrahani