Judul: Optimasi Pelarut Ekstraksi Buah Kapulaga Jawa (Amomum compactum) Terhadap Kandungan Fenolik, Flavonoid, Dan Kapasitas Antioksidan
Abstrak: Tanaman kapulaga jawa (Amomum compactum) merupakan salah satu tanaman rempah yang berpotensi sebagai antioksidan karena mempunyai kandungan metabolit sekunder berupa fenolik dan flavonoid. Pemilihan konsentrasi pelarut dan pH yang tepat merupakan hal yang penting dalam proses ekstraksi senyawa bioaktif. Penelitian ini bertujuan menganalisis variasi pH dan konsentrasi etanol yang optimum terhadap kandungan fenolik, flavonoid, dan kapasitas antioksidan dari buah kapulaga jawa dengan teknik microwave assisted extraction (MAE). Rancangan optimasi pelarut dibuat menggunakan Design Expert 13.0 dengan metode Response Surface Methodology (RSM). Hasil penelitian menunjukkan kadar total fenolik optimum etanol 53% dan pH 3,1. Kadar total flavonoid optimum pada etanol 30% dan pH 2,8. Kapasitas antioksidan DPPH (2,2’-dipenil-1-pikrilhidrazil ) dan FRAP (Ferric Reducing Antioxidant Power) optimum pada etanol 70% pH 3,96. Solusi optimasi yang didapat yaitu penggunaan etanol 57,627% dan pH 3,402 dengan nilai desirability 0,684.
Keyword: Antioxidants, phenolics, flavonoids, microwave assisted extraction, javanese cardamom

Judul: Total Phenolics, Flavonoids and Antioxidant Tests Variations in Extraction Methods and Solvents for Java Cardamom Fruit (Amomum compactum Sol. Ex Maton)
Abstrak: Metode dan pelarut ekstraksi dilaporkan mempengaruhi kadar senyawa metabolit sekunder dan aktivitas antioksidan buah kapulaga jawa. Penelitian ini bertujuan menentukan pengaruh metode dan jenis pelarut ekstraksi terbaik filtrat buah kapulaga jawa (Amomum compactum) berdasarkan kadar total fenolik, flavonoid dan aktivitas antioksidan. Buah kapulaga jawa diekstraksi dengan metode konvesional Refluks dan metode modern yaitu Microwave Assisted Extraction (MAE) dan Continuous Shaking Extraction (CSE) dengan pelarut Etanol, Metanol, dan Akuades. Hasil penelitian menunjukkan metode ekstraksi MAE pelarut Akuades memperoleh hasil tertinggi pada kadar fenolik yaitu 1,33, Extraction methods and solvents were reported to influence the levels of secondary metabolite compounds and antioxidant activity of Javanese cardamom fruit. This study aimed to determine the effect of the best extraction method and type of solvent for Javanese cardamom (Amomum compactum) fruit filtrate based on total phenolic, flavonoid and antioxidant activity levels. Javanese cardamom fruit is extracted using the conventional Reflux method and modern methods, namely Microwave Assisted Extraction (MAE) and Continuous Shaking Extraction (CSE) with the solvents Ethanol, Methanol, and Aquades. The results showed that the MAE extraction method using Aquades solvent obtained the highest results in phenolic content, namely 1.33
Keyword: antioxidant, cardamom, methods, secondary metabolites, solvents

Judul: Implementation of Spatio-Temporal Change Query in Relational Database.
Abstrak: Geographic object changes in various views. Object changes are recorded using a model of static storage. No historical connection between old version data and new version data has been built. For that, a storage model of spatio-temporal queries that can analyze spatio-temporal changes has been developed. The object changes the geometry are grouped according to the taxonomy of Spatio-Temporal Pattern Change. This research has been able to apply the query patterns change including born, expand, merge, contract, split, normal and die. This query based on geometric (area) changes. The implementation of spatio-temporal change queries represents an object changes continuously with easy, change detection is done by comparing two versions of data. Keyword: spatio-temporal change query, spatio-temporal change pattern.
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