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  • FTIR Spectroscopic Analysis and Antioxidant Activity of Extracts and Fractions from Impatiens balsamina L. Leaves

    Secondary metabolites in Impatiens balsamina L. leaves notably flavonoids, phenolics, naphthoquinones, and glycosides, exhibited high structural diversity, supporting both its traditional medicinal applications and...
    Putri Ramanda Indonesia , Morina Adfa Indonesia , Salprima Yudha S. Indonesia
    Pages: 1087-1098 2026-11-12
    10.24036/eksakta/vol27-iss06/781
    0 0
  • SINTESIS DAN KARAKTERISASI NANOPARTIKEL ZnO DOPED Cu2+ MELALUI METODA SOL-GEL

    Penelitian mengenai sintesis nanopartikel ZnO undoped dan doped Cu 2+ telah dilakukan melalui metoda sol-gel, dengan menggunakan zink (II) asetat dihidrat sebagai prekursor, isopropanol sebagai pelarut, dan...
    Sherly Kasuma Warda Ningsih Indonesia
    Pages: 39-51 2017-11-30
    10.24036/eksakta/vol18-iss02/51
    4300 4644
  • The Influence of NaOH Activator Concentration on the Synthesis of Activated Carbon from Banana Peel for Pb(II) Adsorption

    Lead has been known as one of the heavy metals with a high adverse effect to the environment and human health. This study reports the activity of activated carbon from biomass of banana peel as an adsorbent to...
    Abdul Hamid Indonesia , Zeni Rahmawati Indonesia , Mohammad Abdullah Indonesia , Tri Esti Purbaningtyas Indonesia , Faizatur Rohmah Indonesia , Ike Dayi Febriana Indonesia
    Pages: 158-166 2022-09-30
    10.24036/eksakta/vol23-iss03/323
    1243 799
  • The Adsorption of Mercury from Aqueous Solution on Durian (Durio zibethinus) Seed Immobilized Alginate

    The increasing pollution of toxic heavy metals in the environment is an important issue worldwide. Heavy metal ions such as mercury have attracted special attention because of their high toxicity and long half-life...
    Intan Lestari Indonesia , Silfia Devi Eka Putri Putri Indonesia , Martina Asti Rahayu Indonesia , Diah Riski Gusti Indonesia
    Pages: 30-41 2022-03-30
    10.24036/eksakta/vol23-iss01/305
    610 529
  • DEGRADASI METHYLENE BLUE MENGGUNAKAN KATALIS ZnO-PEG DENGAN METODE FOTOSONOLISIS

    Study about degradation of methylene blue using photosonolysis method has been done. This research aims to investigate  effect of variation radiation times, pH, and concentrations doping PEG (polyethylene...
    Hary Sanjaya Indonesia
    Pages: 21-29 2017-11-30
    10.24036/eksakta/vol18-iss02/45
    2680 4003
  • DEGRADASI METIL VIOLET MENGGUNAKAN KATALIS ZnO-TiO2 SECARA FOTOSONOLISIS

    Research on the degradation of methyl violet has been done by using photosonolysis method. The purpose of this study is to determine how much time the optimum, optimum pH and the amount of doping TiO2 optimum...
    Hary Sanjaya Indonesia
    Pages: 91-99 2018-04-25
    10.24036/eksakta/vol19-iss1/131
    2579 3353
  • Methanol Extract of Melastoma malabathricum Leaves as Eco-Friendly Corrosion Inhibitor for Mild Steel in Sulfuric Acid

    Methanol extract of Melastoma malabathricum (MEMML) contains secondary metabolites such as phenolics and flavonoids. These compounds have OH groups that can interact with Fe contained in steel and form a thin layer...
    Diah Riski Gusti Indonesia , Intan Lestari Indonesia , Faizar Farid Indonesia , Abdi Wahyudi Indonesia , Azril Taiwan, Province of China , Mohd Zaki Sukor Malaysia
    Pages: 352-361 2023-09-30
    10.24036/eksakta/vol23-iss03/386
    1764 267
  • GRAFTING POLIPROPILENA DENGAN MALEAT ANHIDRIDA SEBAGAI PENGIKAT SILANG DENGAN INISIATOR BENZOIL PEROKSIDA

    Padang 25171 (0751-7055053 – 081374388030) rachmihidayani@gmail.com   ABSTRAK                   Telah dilakukan...
    Tengku Rachmi Hidayani Indonesia
    Pages: 56-62 2018-04-25
    10.24036/eksakta/vol19-iss1/127
    1590 2096
  • Digestibility and Physicochemical Properties of Brown Rice and Black Glutinous Rice under a Combination of Heat-Moisture Treatments and Citric Acid

    Brown rice and black glutinous rice are rich in nutrients and fiber the body needs. The difference between brown and black glutinous rice lies in the starch content, namely amylose, and amylopectin, which can affect...
    Annisa Mawaddah Indonesia , Endang Saepudin Indonesia , Tuti Wukirsari Indonesia
    Pages: 249-258 2023-06-30
    10.24036/eksakta/vol24-iss02/370
    325 306
  • Characterization of Hesperidin-PEG 1000 Solid Dispersion Prepared by Freeze Drying Method

    Hesperidin is a disaccharide-derivative bioflavonoid in BCS class II, insoluble in water but soluble in propylene glycol and polyethylene glycol, and its poor aqueous solubility may impair bioavailability,...
    Aga Mikail Indonesia , Aditya Trias Pradana Indonesia , Endang Wahyu Fitriani Indonesia , Agnes Nuniek Winantari Indonesia , Astridani Rizky Putranti Indonesia , Xandramela Limala Alicya Junaidi Lee Indonesia
    Pages: 536-548 2026-08-30
    10.24036/eksakta/vol27-iss04/702
    88 79
  • PENGARUH WAKTU HIGH ENERGY MILLING TERHADAP KARAKTERISTIK NANOKAOLIN CAPKALA ASAL KALIMANTAN BARAT

    Synthesis of nanokaolin from Capkala’s natural clay from Bengkayang, West Borneo has been studied. Modification of kaolin particles into nano size was done by high energy milling methods using HCl 2M activator...
    Muhamad Nasir Indonesia
    Pages: 200-209 2017-11-30
    10.24036/eksakta/vol18-iss02/78
    850 1008
  • Synthesis of Nano alfa-Cellulose-Based Bioplastic from Empty Fruit Bunches of Palm Oil

    Cellulose, as a renewable resource, has recently emerged as a primary focus for researchers aiming to develop sustainable biomaterials.  FTIR spectra show that there is no significant difference between them....
    Benny Rio Fernandez Indonesia , Rycce Sylviana Pratikha Indonesia , Sari Farah Dina Indonesia , Poltak Evencus Hutajulu Indonesia , Gimelliya Saragih Indonesia , Dafina Ariza Indonesia , Indah Fitri Ramadhani Indonesia , Yosef Boy Wijaya Sinaga Indonesia
    Pages: 401-414 2026-06-30
    10.24036/eksakta/vol27-iss03/700
    135 106
  • Synthesis and Characterization of Sodium Aluminate from Aluminum and Sodium Hydroxide

    The synthesis of sodium aluminate from aluminum and sodium hydroxide was successfully conducted to optimize its potential as a precursor for zeolite production. Aluminum was reacted with NaOH solution under...
    Dinalia Dinalia Indonesia , Syamsi Aini Indonesia , Jon Efendi Indonesia
    Pages: 500-515 2025-12-30
    10.24036/eksakta/vol26-iss04/627
    704 349
  • KARAKTERISASI PLASTIK BIODEGRADABEL DARI LDPE-g-MA DAN PATI TANDAN KOSONG SAWIT

    Penelitian ini bertujuan untuk menghasilkan suatu plastik  biodegradabel yang dapat terurai di alam, sehingga dapat menjadi salah satu solusi dalam penumpukan sampah plastik yang sulit diuraikan oleh alam....
    Selfa Dewati Samah Indonesia
    Pages: 30-38 2017-11-30
    10.24036/eksakta/vol18-iss02/48
    1345 2005
  • Preparation and Characterization of Magnetite Fe3O4-Activated Carbon Composite as Adsorbent Cr(VI) Ion

    Metal ion such as Cr(VI) is one toxic heave metal at the trace level, thus it is necessary to remove metal ion Cr(VI) ion environmental. The absorption of Cr(VI) ions was carried out using a Fe 3 O 4 magnetite...
    Intan Lestari Indonesia , Yonanda Ramadhanty Indonesia , Leny Marlinda Indonesia , Ngatijo Ngatijo Indonesia
    Pages: 238-247 2021-12-30
    10.24036/eksakta/vol22-iss4/284
    952 593
  • Isolation and Characterization of Flavonoid from Mimosa pudica

    Indonesia has a rich biodiversity, including the putri malu plant ( Mimosa pudica L.) which is known to have secondary metabolites with medicinal potential but has not been fully utilized. The purpose of this work...
    Muhamad Afham Indonesia , Rudi Hendra Indonesia , Hilwan Yuda Teruna Indonesia
    Pages: 302-311 2025-09-30
    10.24036/eksakta/vol26-iss03/608
    319 304
  • Utilization of Dry Cocoa Pod Husks as an Antioxidant-Rich Herbal Drink

    Cocoa ( Theobroma cacao L) production in Indonesian has increased every year, therefore more cocoa pod husks are produced. Currently, the use of cocoa pod husks is still very limited, even most farmers only dump the...
    Ernarisa Fitri Indonesia , Effendi Effendi Indonesia , Azmi Azra Indonesia
    Pages: 102-109 2021-06-27
    10.24036/eksakta/vol22-iss2/262
    836 523
  • Kaolinite Nanotubes as Support Catalysts of Sulfuric Acid (H2SO4) for Transesterification Reaction of Waste Cooking Oil into Methyl Ester for Biodiesel

    This study aims to improve the catalytic performance of kaolinite by converting it into kaolinite nanotubes and utilizing it as a support for sulfuric acid catalysts. Analysis using XRD and TEM revealed that the...
    Ernarisa Fitri Indonesia , Rahadian Zainul Indonesia , Syukri Indonesia
    Pages: 128-139 2025-06-30
    10.24036/eksakta/vol26-iss02/577
    267 289
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