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Armeida Dwi Ridhowati Madjid
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Fakultas Sains dan Teknologi Universitas Islam Negeri (UIN) Maulana Malik Ibrahim Malang Gedung BJ Habibie Lt 2 Jl. Gajayana 50 Malang 65144 Indonesia
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Alchemy : Journal of Chemistry
Published by Universitas Islam Negeri Maulana Malik Ibrahim Malang
ISSN : 20861710     EISSN : 24606871     DOI : http://dx.doi.org/10.18860/al
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
ALCHEMY: Journal of Chemistry (eISSN 2460-6871) is a scientific journal that focus on chemistry. This journal publishes a scientific article that cover research and review articles. Research topics for this journal such as natural science, physical chemistry, inorganic chemistry, organic chemistry, environment, biochemistry, marine, energy and other related-sciences. ALCHEMY: Journal of Chemistry also accepts article about halal products and chemistry on Islamic perspectives.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol 5, No 3 (2017): ALCHEMY" : 5 Documents clear
Pengaruh Penambahan Montmorillonit pada Sifat Mekanik Material Komposit Edible Film Gelatin Ceker Ayam-Montmorillonit Nugraha, Irwan; Hidayati, Kuni
ALCHEMY Vol 5, No 3 (2017): ALCHEMY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (653.709 KB) | DOI: 10.18860/al.v5i3.4201

Abstract

Penelitian mengenai pengaruh penambahan montmorillonit pada edible film gelatin telah dilakukan. Gelatin yang digunakan pada penelitian ini merupakan gelatin yang telah diisolasi dari ceker ayam. Isolasi dilakukan dengan metode ekstraksi menggunakan asam asetat. Penambahan plasticizer gliserol dilakukan untuk meningkatkan sifat elastisitas edible film. Penambahan filler montmorillonit bertujuan untuk meningkatkan sifat mekanik komposit edible film. Penambahan filler montmorillonit dilakukan secara bervariasi, yaitu 1, 2, 3, 4, dan 5% (b/b). Pengujian sifat mekanik komposit edible film gelatin ceker ayam-montmorillonit meliputi kuat tarik, persen pemanjangan, modulus elastisitas dan laju transmisi uap air. Secara umum, penambahan montmorillonit sebesar 3% (b/b) dapat menaikkan kuat tarik edible film yang dihasilkan setelah ditambahkan filler montmorillonit dari 0,2751 menjadi 2,4127 MPa; persen pemanjangan dari 20,9416 menjadi 65,8763%; dan modulus elastisitas 0,0366 menjadi 0,0131 MPa; dan terjadi penurunan laju transmisi uap air dari 9,348 menjadi 8,0805 g/cm2 per jam.
Synthesis and Characterization of Mesoporous NaX Zeolite from Kaolin Loading of Soursop Leaves Extract (Annona muricata Linn.) Nasifah, Ilmin; Khalifah, Susi Nurul; Hayati, Elok Kamilah
ALCHEMY Vol 5, No 3 (2017): ALCHEMY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1086.436 KB) | DOI: 10.18860/al.v5i3.4621

Abstract

Mesoporous NaX zeolite has been synthesized from calcined kaolin with the addition of 5M NaOH and CTABr surfactant as mesoporous template by hydrothermal method. The result of synthesis was used as anticancer loading agent of ethanol extract soursop leaves. Characteristics of zeolite were studied by XRD, IR spestroscopy, Nitrogen Adsorption and SEManalysis. The mesoporous NaX zeolite has been formed with mixing of A, Y, kaolinite and quartz phases. The surface of zeolite particles has changed from amorphous to regular and uniform particles. The pores of NaX zeolite belongs to mesoporous type with size 6.13 nm. Loading process of soursop leaves extract on zeolite decreased intensity and crystallinity of zeolite peaks. The new absorption in soursop leaves extract loaded on zeolite spectra was detected at 2928.174 cm-1. The surface of zeolite seen to be compact and irregular.
Kopling Oksidatif Eugenol Menggunakan Ekstrak Enzim Peroksidase dari Akar Tanaman Sawi Hijau serta Uji Bioaktivitasnya Ardiansah, Bayu; Cahyana, Antonius Herry; Suwarso, Wahyudi Priyono; Maryana, Rianti; Merly, Siti
ALCHEMY Vol 5, No 3 (2017): ALCHEMY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (630.772 KB) | DOI: 10.18860/al.v5i3.3776

Abstract

Peroxidase has been successfully extracted and partially purified from Brassica juncea L. Czern root with protein content and specific activity of 0.747 mg/mL and 0.244 U/mg, respectively. Then, it was applied as biocatalyst for green oxidative coupling reaction of eugenol to produce an orange crystal, dimeric form of eugenol (84% yield). Structure elucidation was done by using FTIR, UV-Vis and GC-MS instruments. The optical activity of dimeric eugenol was found to have Ra-configuration. Furthermore, biological activity of the product as antioxidant has been evaluated resulting in IC50 values of 32.14 and 42.43 ppm for dimeric and monomeric eugenol, respectively.
Kinetika Adsorpsi Cangkang Telur pada Zat Warna Metilen Blue Badriyah, Lailatul; Putri, Mardiana Prasetyani
ALCHEMY Vol 5, No 3 (2017): ALCHEMY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (517.166 KB) | DOI: 10.18860/al.v5i3.3858

Abstract

The analyze of reaction kinetic adsorption of methylene blue by egg shell was studied. Methylene Blue was one of the dye which used in industry applied. It was an organic compound that dangerous if it throw away in the river without prepraration yet. As a consequence would be object that could interfere biota aquatic. So, it need a treatment in liquid dye waste, that could reduce degree of dye. One of the treatment was adsorption. Egg shell shyntesized were analyzed by using FTIR. It was done to know some function groups that in. The reaction kinetic experiment was done to count in adsorption dye process, especially in the wastewater from textile industry. Dyes adsorption by using egg shell has equilibrium time at the 70 minutes after adsorption process. After that, the process has not a different significantly. The experiment data were fitted into the Langmuir and Freundlich isotherm. Both of the adsorption isoterm, the R2 value of Langmuir isotherm model was the highest, 0,9986. Having a As coeficient 0,3589 and Kb 0,7962. The adsorption kinetics of Methylene Blue on egg shell could be described by a pseudo second order model, with the regresion, R2 0,9979.
Preparasi dan Karakterisasi Nanobiokatalis Mikroreaktor dengan Polimer Monolitik Nanopori Enzim Termobilisasi Anggraeny, Baiq Octaviana Dwi; Raeni, Septi F.; Iftitah, Elvina D.; Sabarudin, Akhmad
ALCHEMY Vol 5, No 3 (2017): ALCHEMY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (896.154 KB) | DOI: 10.18860/al.v5i3.3616

Abstract

Pada penelitian ini telah dilakukan pengembangan pembuatan kolom nanobiokatalis mikroreaktor yang terimobilisasi oleh enzim tripsin pada polimer monolitik nanopori. Polimer monolitik nanopori dibuat secara in-situ kopolimerisasi  dalam kolom silicosteel (1.0 mm i.d x 100 mm) dari monomer GMA dan EDMA sebagai crosslinker serta penambahan porogen dengan komposisi 1-propanol/1,4-butanediol/air (7:4:1) dan inisiator radikal AIBN 1%. Proses polimerisasi berlangsung selama 12 jam pada suhu 60°C dengan persentase total monomer %T 40 dan persentase crosslinker %C 25. Monolit dimodifikasi secara kimia menggunakan metode imobilisasi enzim melalui reaksi pembukaan cincin epoksida dari polimer monolit terhadap tripsin. Beberapa parameter uji dilakukan untuk menghasilkan mikroreaktor pada kondisi optimum yaitu variasi waktu imobilisasi dan pengaruh penambahan glutaraldehida pada kolom tripsin monolit. Karakterisasi yang dilakukan meliputi uji ISEC untuk mengetahui ukuran dan distribusi pori monolit, SEM-EDX untuk mengetahui struktur morfologi kolom mikroreaktor, dan uji permeabilitas kolom mikroreaktor. Berdasarkan hasil ISEC proporsi mesopori dan makropori (flow-through pore) seimbang yaitu 65,85% dan 28,20%.  Hasil SEM-EDX menunjukkan kandungan nitrogen tertinggi yang mewakili jumlah tripsin yang terimobilisasi dalam monolit sebesar 12,40% dihasilkan dari tripsin monolit dengan waktu imobilisasi 4 jam tanpa penambahan glutaraldehida. Nanobiokatalis mikroreaktor pada kondisi optimum dapat digunakan untuk proses digestion sampel protein secara cepat dan efisien.

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