Publisher: UIN Maulana Malik Ibrahim Malang   (Total: 14 journals)   [Sort by number of followers]

Showing 1 - 14 of 14 Journals sorted alphabetically
Alchemy : J. of Chemistry     Open Access   (Followers: 4)
De Jure: Jurnal Hukum dan Syar'iah     Open Access   (Followers: 4)
El-Harakah     Open Access   (Followers: 2)
el-Hayah     Open Access  
El-Hikmah     Open Access   (Followers: 2, SJR: 0.102, CiteScore: 0)
EL-MUHASABA     Open Access   (Followers: 1)
J. of Islamic Architecture     Open Access   (Followers: 12)
Jurisdictie Jurnal Hukum dan Syariah     Open Access   (Followers: 1)
Jurnal NEUTRINO     Open Access  
LiNGUA : Jurnal Ilmu Bahasa dan Sastra     Open Access   (Followers: 2)
MADARASAH Jurnal Pendidikan dan Pembelajaran Dasar     Open Access   (Followers: 1)
MATICS     Open Access   (Followers: 2)
SAINSTIS     Open Access   (Followers: 1)
Ulul Albab     Open Access   (Followers: 3)
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Alchemy : Journal of Chemistry
Number of Followers: 4  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2086-1710 - ISSN (Online) 2086-1710
Published by UIN Maulana Malik Ibrahim Malang Homepage  [14 journals]
  • Free-Radical Scavenging Activity (FRSA) of Secondary Metabolite Extracted
           from Indonesian Eucheuma spinosum

    • Authors: Nurul Inayah, Masruri Masruri
      Pages: 1 - 6
      Abstract: IIndonesia is the biggest country in the production of red seaweed of Eucheuma spinosum. The red seaweed has bioactive compounds that have a potential activity such as phenolic compounds as well as carrageenan and pigments. This paper reported phytochemical analysis of E. spinosum harvested by a local farmer in Sumenep Island, East Java and free-radical scavenging activity (FRSA) derived from 2,2’-diphenyl-1-picrylhdrazyl (DPPH) for several organic solvents. For extraction, dried powder is added with 5.0 mL of various solvents following by ultra-sonication assisted extraction for 30 minutes. The extract was separated by centrifugation for phytochemical analysis and radical scavenging evaluation. The prospecting of dichloromethane, ethyl acetate, and n-hexane extracts indicated the potency for radical scavengers. Alkaloids, terpenoids, and saponins were secondary metabolites that indicated the presence in the extracts. The best IC50 value was presented by ethyl acetate extracts (384,86 ppm) with 38.78% for 50 ppm, while IC50 values of n-hexane, methanolic, dicloromethane extracts were 410.12, 677.76 and 685.08 ppm, respectively. Keywords: Eucheuma spinosum, phytochemical analysis, radical scavenging activity
      PubDate: 2021-04-08
      DOI: 10.18860/al.v9i1.10970
      Issue No: Vol. 9, No. 1 (2021)
  • Ekstraksi Zat Warna Alami dari Kayu Bakau (Rhizophora mucronata) dengan
           Metode Microwave Assisted Extraction

    • Authors: Yuyun Yuniati, Maulidya D. Cahyani, Ifra Novidayasa, Pantjawarni Prihatini, Mahfud Mahfud
      Pages: 7 - 14
      Abstract: Dyes are widely used for various manufacturing processes. However, the high use of synthetic dyes has resulted in pollution and health problems. To overcome this problem, one way that can be done is to return to using natural dyes. Natural dyes can be obtained from various plants, one of which is the Indonesian mangrove plant (Rhizophora mucronata). This research has succeeded in extracting natural dyestuffs from mangrove bark using the microwave-assisted extraction method. Mangrove wood extraction was carried out with solvents, namely distilled water and ethanol 96%, which was optimized based on the ratio of sample mass to volume of solvent and extraction power. The results showed that qualitatively the mangrove extract contained tannins, flavonoids, and quinones as compounds that gave chocolate color. The color resistance of mangrove extracts is very strong in textiles under alkaline conditions. Based on the results of extraction optimization, the optimum conditions were obtained at a ratio of 0.067 g/mL of 96% ethanol at 380 watts of power, with a yield percentage reaching 53.053%. Keywords: extraction, mangrove wood, microwave Zat warna banyak digunakan untuk berbagai proses manufaktur. Namun, tingginya penggunaan zat pewarna sintetis mengakibatkan pencemaran dan masalah kesehatan. Untuk mengatasi masalah tersebut, salah satu cara yang dapat dilakukan adalah kembali menggunakan zat warna alami. Zat pewarna alami dapat diperoleh dari berbagai tumbuhan, salah satunya tanaman bakau Indonesia (Rhizophora mucronata). Penelitian ini telah berhasil melakukan ekstraksi zat warna alami kulit kayu bakau dengan metode microwave-assisted extraction. Ekstraksi kayu bakau dilakukan dengan pelarut yaitu akuades dan etanol 96% yang dioptimasi berdasarkan rasio massa sampel–volume pelarut dan daya ekstraksi. Hasil penelitian menunjukkan bahwa secara kualitatif ekstrak kayu bakau mengandung tanin, flavonoid, dan kuinon sebagai senyawa pemberi warna coklat. Ketahanan warna ekstrak kayu bakau sangat kuat pada bahan tekstil pada kondisi basa. Berdasarkan hasil optimasi ekstraksi, kondisi optimum didapatkan pada rasio massa sampel-volum pelarut sebesar 0,067 g/mL dan daya sebesar 380 Watt sehingga diperoleh persentase yield mencapai 53,053%. Kata kunci: ekstraksi, kayu bakau, microwave
      PubDate: 2021-03-30
      DOI: 10.18860/al.v9i1.11038
      Issue No: Vol. 9, No. 1 (2021)
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