Judul: Antioxidant Activity and Total Phenolic Content of Cinnamon Bark (Cinnamomum burmannii) from Jambi based on Simplisia's Particle size
Abstrak: Kulit kayu manis mengandung senyawa polifenol yang berpotensi sebagai antioksidan dan dapat ditingkatkan dengan memperkecil ukuran partikel simplisia. Penelitian ini bertujuan menentukan pengaruh ukuran partikel simplisia terhadap rendemen ekstrak, nilai kadar total fenolik, dan aktivitas antioksidan kulit kayu manis asal Jambi. Kayu manis diekstraksi menggunakan pelarut etanol 70%, pengujian aktivitas antioksidan dilakukan menggunakan uji DPPH dengan nilai IC50. Hasil rendemen simplisia nanopartikel lebih tinggi yakni sebesar 38,36% dari kedua sampel lainnya. Hasil uji aktivitas antioksidan sampel simplisia nanopartikel lebih kuat yakni sebesar 34,56 ± 0,72 μg/ml daripada kedua sampel lainnya. Kadar total fenolik sampel simplisia nanopartikel lebih tinggi daripada sampel lainnya yakni sebesar 60,14 ± 3,66 mg GAE/g bobot kering. Hasil pengujian menunjukkan hasil yang berbeda nyata (p<0,05). Korelasi diantara nilai total fenolik dengan nilai IC50 DPPH sangat kuat dan bernilai negatif. Semakin tinggi kadar total fenolik maka semakin kecil nilai IC50, sehingga semakin baik aktivitas antioksidan yang dimiliki pada sampel. Ukuran simplisia terbukti secara positif mempengaruhi hasil rendemen ekstrak, nilai kadar total fenolik dan aktivitas antioksidan kulit kayu manis., Cinnamon bark is known contains polyphenol compounds which have potential as antioxidants and can be increased by reducing the size of the simplisia particles. This research was aimed to determine the effects of simplisia’s particle size on extract yield, total phenolic levels, and antioxidant activity of cinnamon bark from Jambi. Cinnamon was extracted using 70% ethanol solvent, antioxidant activity testing was performed using DPPH test with IC50 value. The yield of simplisia nanoparticles was higher at 38.36%. The antioxidant activity test results of the nanoparticle simplisia samples were stronger, 34.56 ± 0.72 μg/ml than the. The TPC of the nanoparticle simplisia samples was higher than the other samples, 60.14 ± 3.66 mg GAE/g dry weight. The test results showed significantly different results (p<0.05). The correlation between the total phenolic value and the IC50 DPPH value is very strong and negative. The higher the total phenolic content, the lower the IC50 value, so the better the antioxidant activity in the sample. The simplisia size was proven to positively affect the total phenolic content and antioxidant activity of cinnamon bark.
Keyword: antioksidan, fenolik, kulit kayu manis, nanopartikel

Judul: Examination of Total Flavonoids and  Antioxidant Activity FRAP Ethanol Extract and Water Extract of Cinnamomum  burmannii from Three Regions
Abstrak: Keberagaman wilayah geografis dapat mempengaruhi produktivitas tanaman lokal. Penelitian ini bertujuan mengidentifikasi pengaruh lokasi tumbuh dan jenis pelarut pada ekstraksi kulit kayu manis (Cinnamomum burmannii) asal Jambi, Padang Aro dan Bogor terhadap total flavonoid metode kolorimetri dengan pereaksi AlCl3 dan aktivitas antioksidannya melalui uji FRAP. Ekstrak hasil maserasi etanol 70% dari kayu manis yang tumbuh di Padang Aro menunjukkan hasil tertinggi dibanding sampel lainnya pada pengukuran total flavonoid dan aktivitas antioksidan yaitu sebesar 22,09 mgQE/g dan 4408,55 µmolTE/g. Meskipun demikian, simplisia asal Padang Aro menghasilkan rendemen paling sedikit dibandingkan sampel lainnya untuk semua jenis pelarut: 14,74% pada ekstrak etanol dan 6,89% pada ekstrak air. Berdasarkan hasil uji korelasi Pearson, jumlah flavonoid berkorelasi tidak signifikan terhadap aktivitas antioksidan metode FRAP (R= 0,79; CI = - 0,05–0,97)., Geographic diversity can influence local crop productivity. This research aims to identify the effect of growth location and type of solvent used in the extraction of cinnamon (Cinnamomum burmannii) bark grew in Jambi, Padang Aro and Bogor on total flavonoids examinated by colorimetric method with AlCl3 reagent and their FRAP antioxidant activity. Etanol 70% extract from maseration of cinnamon bark growth in Padang Aro showed the highest results compared to other samples in total flavonoids and antioxidant activity measurement, 22,01 mgQE/g and 4408,55 µmolTE/g. Otherwise, simplicia from Padang Aro produced the lowest yield compared to other samples for all types of solvents: 14,73% in ethanol extract and 6,89% in water extract. According to the result of Pearson correlation test, the amount of flavonoids are not significantly correlated with FRAP method antioxidant activity (R= 0,79; CI = - 0,05—0,97).
Keyword: Cinnamomum burmannii, growth location, flavonoid, FRAP

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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