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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 169 Documents
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Preparation and Characterization of Graphene Oxide from Rice Husk Atina Khoiron Nisa; Ganden Supriyanto; Wan Aini Wan Ibrahim
ALCHEMY:Journal of Chemistry Vol 11, No 1 (2023): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v11i1.16006

Abstract

Preparation and characterization of Graphene Oxide (GO) Fe3O4 nanocomposite has been done. The characterized by XRD showed that graphite,GO and GO-Fe3O4 were amorph. Characterized by FTIR showed that there were a distinctive vibration bands of C-O,C=O, C=C, and OH, and additional bands belong to Fe-O dan Fe-C for the GO-Fe3O4. FESEM analysed showed that GO have smooths and sheets, and fill the wrinkled circle on the surface GO was showed presence of Fe3O4. The diameters of Fe3O4 was 39 nm. Atoms distribution Fe, C, and O of Fe3O4 on the GO sheets showed 15 %. D-band and G-band of GO were 1331 cm-1 dan 1570 cm-1 and D-band of GO-Fe3O4 were 1331 cm-1 based on analyzed using Raman spectroscopy.
Karakterisasi Fraksi Aktif Antioksidan dari Biji Gandaria (Bouea macrophylla) Maidah Nopiana; Erica Mutiara Putri; Annastaya Novariyan; Iip Pahrudin; Candra Junaedi; Tarso Rudiana
ALCHEMY:Journal of Chemistry Vol 11, No 1 (2023): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v11i1.17711

Abstract

Gandaria (Bouea macrophylla) plants contain antioxidant compounds that can reduce free radicals. Free radicals are one of the causes of various degenerative diseases. The purpose of this study was to determine the fraction that had the highest antioxidant activity, and to determine the secondary metabolites contained in the most active fraction of B. macrophylla seeds based on LCMS/MS analysis. Maceration of B. macrophylla seeds with ethanol solvent. Ethanol maserate was concentrated and fractionated by liquid-liquid extraction method using n-hexane, ethyl acetate and ethanol as solvents. Antioxidant activity was measured by the free radical scavenger method with 1,1-diphenyl-2-picrylhidrazil as a source of radicals and characterization of the secondary metabolites contained in the most active fraction using a Liquid Chromatography-Mass Spectrometer. B. macrophylla seed ethanol extract has a % yield of 31.75%. The ethyl acetate fraction of B. macrophylla seeds has the highest mass compared to other fractions and has strong antioxidant activity with an IC50 value of 2.95 ppm. The ethyl acetate fraction of B. macrophylla seeds contains tannins, phenolic, flavonoid dan alkaloid compounds. Based on the results of the identification of secondary metabolites by LC-MS/MS, the ethyl acetate fractions of B. macrophylla seeds contained phenylalalnine compounds.
Isolation and Characterization of Secondary Metabolites in Ethyl Acetate Fraction From Indonesian Eucheuma Spinosum Nurul Inayah; Masruri Masruri
ALCHEMY:Journal of Chemistry Vol 11, No 2 (2023): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v11i2.20446

Abstract

AbstractEucheuma spinosum is a type of red algae (Eucheuma) which is used as a food which has a high source of carrageenan. Information on secondary metabolites in E. spinosum is known to have bioactive properties as an antioxidant and antibacterial. The purpose of this study was to isolate and characterize secondary metabolites in E.spinosum. The study was started by isolating secondary metabolites from E.spinosum using Soxhlet extraction followed by solvent partitioning, fractionation and characterization. The rendemen from methanol extract was 6.07% while the highest partition result was in the ethyl acetate fraction, which was 1.25%. Fractionation was carried out by column chromatography resulting in 2 single spots F401 and A402. Pure isolate F401 has an Rf value of 0.71 in the form of a white solid, A401 has an Rf value of 0.67 in the form of a brown gel. The results of characterization of isolates with a UV-Vis spectrophotometer obtained maximum absorption and absorbance values of F401 218.50 nm 4.79 M-1 cm-1, 273 nm 1.06 M-1 cm-1 respectively. Isolate A402 233.50 nm 4.1 M-1 cm-1, 407 nm 1.03 M-1 cm-1. Identification using FT-IR found that both isolates showed the presence of functional groups =C-H, C-C, C=O, C-H. According to the result of the UV and FT-IR spectra, two isolates can be identified as terpenoid compounds. Keywords: E.spinosum, Secondary Metabolites, Ethyl acetate fraction, UV-VIS, FT-IR   
Fitoremediasi Logam Tembaga oleh Tanaman Genjer (Limnocharis flava) dan Hydrilla verticillata berdasarkan Variasi Konsentrasi Suci Amalia; A. Ghanaim Fasya; Umi Hasanah; Mohammad Rosydul Aqli HS
ALCHEMY:Journal of Chemistry Vol 11, No 2 (2023): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v11i2.18341

Abstract

Genjer (Limnocharis flava) dan Hydrilla verticillata adalah alternatif tanaman yang dapat digunakan sebagai agen fitoremediasi. Penelitian ini bertujuan untuk mengkaji kemampuan Genjer dan Hydrilla dalam meremediasi logam Cu berdasarkan pada pengaruh variasi konsentrasi logam. Sebelum Genjer dipapar dengan logam, terlebih dahulu dilakukan aklimatisasi Kemudian dilakukan proses pemaparan dengan konsentrasi logam Cu 3, 5 dan 7 mg/L. Setelah itu, sampel didestruksi menggunakan microwave digestion dan dianalisis kandungan logam Cu menggunakan instrumen Spektroskopi Serapan Atom (SSA). Hasil analisis terhadap kemampuan Genjer dan Hydrilla verticillata meremediasi logam Cu menunjukkan bahwa tanaman Genjer dan Hydrilla verticillata termasuk dalam kategori tanaman akumulator logam dengan penyerapan paling tinggi masing-masing mencapai 95,83% dan 98,07%. Bagian batang dari Genjer mengakumulasi logam Cu lebih baik dibanding daun. Sedangkan pada Hydrilla verticillata, daunlah yang mengakumulasi logam Cu tertinggi.
Potensi Madu dan Ekstrak Ampas Teh Sebagai Penghambat Tirosinase Untuk Bahan Aktif Kosmetika Pemutih La Ode Sumarlin; Nur Ernita; Hajar Hajar
ALCHEMY:Journal of Chemistry Vol 11, No 2 (2023): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v11i2.19606

Abstract

One way to lighten skin tone is to inhibit the formation of melanin through the inhibition of the tyrosinase enzyme. Bleach acts as an inhibitor of melanin production and is known as a competitive tyrosinase inhibitor. In this study, the potential for teabag and honey dregs will be analyzed singly and in the form of a mixture. The method used is an anti-tyrosinase test using L-DOPA as a substrate. The results of the analysis showed that the tea extract samples were almost all positive test compounds (Flavonoids, Alkaloids, Tannins, Saponins, Steroids) except for Quinones and Triterpenoids. Honey for the positive sample was only for saponin compounds, while those for other compounds were negative. Tea extract has the potential to inhibit the tyrosinase enzyme, because it contains flavonoid compounds, tannins and steroids. Tests for inhibition of the tyrosinase enzyme in honey and tea and a mixture of the two have IC50 values 1000 g/ml, so the inhibitory activity is very weak. However, research has shown that tea bag dregs and honey have the potential to be used as active ingredients in whitening cosmetics.
Optimization of the Hydrolysis Process of Microalgae Porphyridium cruentum Biomass with Variations of Hydrochloric Acid Concentration, Temperature, and Time using Response Surface Methodology (RSM) Livia Rhea Alvita; Vida Elsyana; Ekajayanti Kining
ALCHEMY:Journal of Chemistry Vol 11, No 2 (2023): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v11i2.19500

Abstract

Microalgae Porphyridium cruentum has potential as a raw material for bioethanol production because it has a high carbohydrate content. These carbohydrates can be broken down into reducing sugars through the hydrolysis process. The reducing sugar obtained will be used as a substrate in the production of bioethanol. This study aimed to produce a substrate with the best-reducing sugar indicator and to determine the optimum conditions for hydrolysis of P. cruentum microalgae biomass following the Box-Behnken statistical experimental design, using Response Surface Methodology (RSM). The parameters of the optimized hydrolysis process were HCl concentration (2 - 0.2 N), temperature (60 -120 ˚C), and hydrolysis time (30-180 min). The optimum conditions that have been achieved using RSM are an HCl concentration of 1.91 N, a temperature of 60 °C, and a hydrolysis time of 180 min were predicted a maximum total reducing sugar production of 810 mg/L. The experimental result of total reducing sugar obtained at optimum conditions was 895 mg/L, which was well close to the predicted value, verifying the appropriateness of the model.Abstract is informed about the statements of the problem, methods, scientific finding results and conclusion concisely
Aktivitas Aantioksidan Kombinasi Daun Sirsak (Anonna Muricata L.) dan Daun Beluntas (Pluchea Indica L.) ulfatun hasanah; Nurul Inayah
ALCHEMY:Journal of Chemistry Vol 11, No 2 (2023): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v11i2.20183

Abstract

Soursop (Anonna Muricata L.) and Beluntas (Pluchea indica L.) are plants that contain secondary metabolites that have potential as antioxidants. The purpose of this study was to determine the activity of soursop leaf samples, beluntas and their combination in reducing DPPH. Samples were made into powder followed by maceration and evaporated the solvent to become an extract. Antioxidant activity testing with DPPH silencing method with UV-Vis spectrophotometer. Antioxidant activity test results for soursop leaf samples, beluntas, combinations (1:1), (1:2) and (2:1) have IC50 values of 58, 51, 57, 61 and 68 ppm, respectively. Further analysis Combination index of the combination (1:1) has a synergistic effect and the combination (1:2) and (2:1) has an antagonistic effect. Keywords: Antioxidant Activity, Anonna Muricata L. leaf, Pluchea indica L. leaf, DPPH 
Pengaruh CarboxyMethyl Cellulose Terhadap Sifat Bioplastik Berbasis Tandan Kosong Kelapa Sawit dan Plasticizer Gliserol Zaenab Zaenab; Nia Sasria; Muthia Putri Darsini Lubis
ALCHEMY:Journal of Chemistry Vol 11, No 2 (2023): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v11i2.20389

Abstract

Salah satu cara yang dapat dikembangkan dalam penanggulangan sampah plastik adalah menggunakan Bioplastik. Dengan dilaksanakannya penelitian ini adalah untuk mengetahui pengaruh variasi komposisi zat aditif CarboxyMethyl Cellulose (CMC) terhadap kekuatan tarik, biodegradasi dan daya serap air dari Tandan Kosong Kelapa Sawit (TKKS) dan Pati Kulit Pisang Kepok. Dalam pengolahannya TKKS yang telah di delignifikasi dan bleaching, dilarutkan ke dalam 50 mL aquades bersama dengan pati dan gliserol selama 10-15 menit dengan temperatur 70oC. Setelah itu, ditambahkan CMC yang telah dilarutkan dengan variasi sebanyak 1%, 2%, 3% dan 4% diaduk dan dipanaskan selama 30 menit dengan temperatur 180oC. Kemudian dilakukan pencetakkan menggunakan Teflon dan dimasukan kedalam oven dengan suhu 70oC selama 5 jam. Setelah itu, cetakan dikeluarkan dan didinginkan menggunakan temperatur kamar. Didapatkan nilai kuat tarik tertinggi dengan variasi CMC 4%, yaitu sebesar 2,103 MPa dan elongasi tertinggi terdapat pada variasi CMC 3% sebesar 2,12%. Untuk nilai penyerapan air tertinggi terdapat pada CMC 4%, yaitu sebesar 80,95% dengan ketahanan air sebesar 19,05% sedangkan untuk nilai degradasi tertinggi terdapat pada CMC 4%, yaitu sebesar 88,77%. Kata Kunci: Tandan Kosong Kelapa Sawit, Pati Kulit Pisang Kepok, CMC
Pengaruh Karbopol dan Propilen Glikol terhadap Laju Penetrasi Sediaan Emulgel Xanthone Rich Fraction dari Kulit Buah Manggis (Garcinia mangostana L.) Sabrina Dahlizar; Putri Alifia Agustina; Narti Fitriana; Abdi Wira Septama; Sofa Fajriah; Herdini Herdini
ALCHEMY:Journal of Chemistry Vol 11, No 2 (2023): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v11i2.20520

Abstract

Xanthone Rich Fraction (XRF) derived from mangosteen rind (G. mangostana L.) contains α-mangostin possessed antioxidant property. It may be used to prevent aging (anti-aging). This study aims to determine the effect of adding Carbopol as a gelling agent and propylene glycol as an enhancer on the physical characteristics and penetration rate of the emulgel. Four different formulas were prepared, F1 without a gelling agent (Carbopol) and enhancer (propylene glycol), F2 without a gelling agent (carbopol), F3 using a gelling agent (carbopol), and F4 using a gelling agent (carbopol) and enhancer (propylene glycol). The physical properties of formulas such as organoleptic examination, pH, viscosity, homogeneity, spreadability and cycling test were evaluated. Penetration testing was carried out using a Franz Diffusion cell. The results showed that F3 and F4 had the best physical stability and there was a difference in the penetration rate of α-mangostin from the four formulas. The amount of α-mangostin expanding the area for 6 hours, F1, F2, F3 and F4 were 228,22 µg/cm2; 251,06 µg/cm2(Tabel 3); 852,24 µg/cm2; dan 1.087,15 µg/cm2 respectively. The addition of a combination of Carbopol (gelling agent) and propylene glycol (enhancer) showed the highest penetration rate

Page 17 of 17 | Total Record : 169

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