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All Journal EduChemia: Jurnal Kimia dan Pendidikan Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis BERNAS: Jurnal Pengabdian Kepada Masyarakat
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.
Palm Kernel Shell as a Source of Functional Biochar: A Review of Recent Scientific Progress Cahyanti, Margareta N.; Kusumahastuti, Dewi K.A.; Hartini, Sri
Jurnal Penelitian Pendidikan IPA Vol 11 No 9 (2025): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i9.11849

Abstract

This report examined the research trends in production and application of biochar derived from palm kernel shells (PKS) over the past decade. A Systematic Literature Review (SLR) was conducted on 63 articles indexed in Scopus between 2015 and 2025, with bibliometric mapping performed using VOSviewer. From 2015, the number of publications on PKS biochar grew gradually, reaching a peak in 2020 and 2023.  Through the use of keyword co-occurrence mapping, four significant clusters of PKS biochar research were identified. These clusters primarily dealt with pyrolysis, activated carbon, biofuels, and biomass usage as main themes.  The term "biochar" has a critical function in connecting applications pertaining to agriculture, the environment, and energy, as seen by its core positioning and strong keyword connections across clusters.  Su Shiung Lam and Rock Keey Liew (Universiti Malaysia Terengganu) have the strongest collaboration link (strength 17), according to the VOSviewer study, which is supported by 6 documents and 640 citations.  Based on the number of publications, Malaysia is the leader in PKS biochar research with 33, followed by Thailand with 8 and Indonesia with 6. The findings of this study can serve as a useful reference for researchers and institutions looking to understand current trends, active contributors, and major themes in PKS biochar research.
Antioxidant Profile in Pineapple Peel Fermentation by Lactobacillus plantarum and Lactobacillus casei Hartini, Sri; Cahyanti, Margareta N.; Kusumahastuti, Dewi K. A.; Susilowati, Indah T.; Mahardika, Y. M. Anggara
Jurnal Penelitian Pendidikan IPA Vol 10 No 4 (2024): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i4.7546

Abstract

Pineapple peels are a potential food waste capable of being repurposed as a substrate for producing high-antioxidant probiotic beverages. Therefore, this study aimed to determine the feasibility of using pineapple peels as a substrate for producing high-antioxidant probiotic beverages through fermentation by Lactobacillus plantarum and Lactobacillus casei. Pineapple peels juice was fermented for 48 hours and the growth of microorganisms, reducing sugars, pH, titratable acid, polyphenol compounds, and antioxidant activity were periodically analyzed. The results showed that after 24 hours, the growth of L. plantarum and L. casei gradually slowed down. As fermentation time increased, the levels of reducing sugars and the pH decreased. L. casei reached the highest titratable acidity of 0.90% equivalent to lactic acid after 48 hours of fermentation, while L. plantarum reached 1.21%. The percentage of radical inhibition and phenolic compound increased between 9 and 30 hours of fermentation. The highest inhibition activity of 39% was achieved after 30 hours of fermentation for L. casei, while for L. plantarum, it reached 55% after 9 hours. This study showed that pineapple peels could produce probiotic beverages with high antioxidant. It was a suitable alternative for vegetarians or individuals who were allergic to dairy products.
Co-Authors Alifia Dewi Safira Cucun Alep Riyanto Harry Setiawan Mahardika, Y. M. Anggara Margareta Novian Cahyanti Pandu Krisnawan Rindang A Laksono Ronal F Hindra Sri Hartini Sri Hartini Susilowati, Indah T. Yohanes Martono