Judul: Profil Metabolit Volatil Rimpang Jahe Merah (Zingiber officianale var. Rubrum) yang Dipanen pada Waktu Berbeda
Abstrak: The effect of sunlight intensity to red ginger secondary metabolite has not been known properly. Metabolic profiling can be used to study the correlation between sunlight intensity and secondary metabolite. The profile of volatile metabolite substances from different harvesting time had been examined. Samples of red ginger were harvested in the morning and afternoon. Around 47 volatile substances has been detected using GCMS instrument. Major component that were identified from both harvesting time are camphene, cineol, z-citral, 2,6- octadienol, benzene and α-zingiberene. Antioxidant activity was carried out using DPPH assay. Ascorbic acid was employed as positive control. Essential oil of red ginger was tested using DPPH assay and showed inhibition activities against DPPH radical, nevertheless the inhibition percentage was low and there is not enough prove to show red ginger essential oil have potential as a source of antioxidant. There was no significant difference in radical inhibition activities between both essential oil samples. There was however, a difference in the composition of the volatile component from red ginger essential oil. α-zingiberene compound had showed a significant difference in quantity at different harvesting time under the confirmation of t-test with α=0,05. The quantity of α-zingiberene was higher in afternoon harvesting time.
Keyword: 

Judul: Antioxidant Activity of Ethanol Extract, Nanoparticles, and Microparticles of Red Ginger Rhizomes (Zingiber officinale var. Rubrum) from Sukabumi
Abstrak: Rimpang jahe merah telah terbukti memiliki potensi sebagai sumber antioksidan, sehingga diperlukan metode yang tepat untuk meningkatkan aktivitasnya. Penelitian ini bertujuan membandingkan aktivitas antioksidan dari ekstrak etanol, nanopartikel, dan mikropartikel rimpang jahe merah asal Sukabumi menggunakan metode DPPH. Ekstraksi dilakukan melalui metode maserasi menggunakan pelarut etanol 70%, sintesis nanopartikel menggunakan metode top down synthesis dengan Planetary Ball Mill (PBM), dan pembuatan mikropartikel melalui penyaringan simpisia jahe dengan ayakan berukuran 100 mesh. Hasil penelitian menunjukkan bahwa ekstrak etanol 70% menghasilkan kadar total fenolik tertinggi (35,012 ± 2,145 mg GAE/g) dibandingkan dengan sampel lainnya. Temuan ini sesuai dengan hasil uji aktivitas antioksidan yang menunjukkan bahwa ekstrak etanol memiliki aktivitas antioksidan terkuat dibandingkan dengan sampel lainnya, dengan nilai IC50 sebesar 185,561 ± 8,998 ppm. Metode ekstraksi terbukti lebih meningkatkan kadar total fenolik dan aktivitas antioksidan simpisia rimpang jahe merah, dibandingkan dengan hanya memperkecil ukuran partikel simpisia., Red ginger rhizome has been proven to have the potential as an antioxidant source, thus requiring an appropriate method to enhance its activity. This research aimed to compare the antioxidant activities of ethanol extract, nanoparticles, and microparticles of red ginger rhizome from Sukabumi using the DPPH method. The extraction was conducted through the maceration method using 70% ethanol solvent, nanoparticle synthesis was carried out using the top down synthesis method with Planetary Ball Mill (PBM), and microparticles were obtained through sieving the ginger simplicia using a 100-mesh sieve. The research results revealed that the 70% ethanol extract produced the highest total phenolic content (35,012 ± 2,145 mg GAE/g) compared to other samples. This finding is consistent with the antioxidant activity test results, which showed that the ethanol extract exhibited the strongest antioxidant activity compared to other samples, with an IC50 value of 185,561 ± 8,998 ppm. The extraction method proved to be more effective in increasing the total phenolic content and antioxidant activity of the red ginger rhizome simplicia compared to merely reducing the particle size of the simplicia.
Keyword: Antioxidant, extract, microparticles, nanoparticles, red ginger

Judul: Rencana pengembangan koridor sungai kapuas sebagai kawasan interpretasi wisata budaya Kota Pontianak
Abstrak: Sungai Kapuas sebagai sungai yang membelah Kota Pontianak merupakan sungai terpanjang di Indonesia (1681 km) yang memiliki fungsi ekonomi yang penting bagi kehidupan masyarakatnya. Di sampingn itu Sungai Kapuas merupakan awal dimulainya kebudayaan kota khususnya budaya melayu, namun perkembangan aspek ekonomi masyarakat pada kawasan Sungai Kapuas sering melupakan aspek budaya dan ekologi setempat sehingga hampir hilang dan terlupakan. Untuk itu perlu perencanaan tapak guna pengembangan koridor Sungai Kapuas sebagai aktivitas wisata budaya Kota Pontianak.
Keyword: