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INDONESIA
JURNAL ATOMIK
Published by Universitas Mulawarman
ISSN : 25490052     EISSN : 25490052     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science
Jurnal Atomik (JA) is published twice a year (March and August) by Department of Chemistry, Faculty of Mathematics and Natural Sciences, Mulawarman University. Jurnal Atomik is a media for graduate students of Department of Chemistry to publish their research articles in Chemistry field including Analytical Chemistry, Inorganic Chemistry, Physical Chemistry, Organic Chemistry, and Biochemistry. The research articles that be submitted to Jurnal Atomik have to be approved by Editorial Board and in accordance with the rules of writing approved by Editor of Jurnal Atomik.
Arjuna Subject : -
Articles 194 Documents
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UJI AKTIVITAS ANTIBAKTERI EKSTRAK METANOL DAUN GAHARU (Aquilaria malaccensis Lamk.) TERHADAP BAKTERI Streptococcus sobrinus dan Salmonella typhi Kusumawardani, Niken; Saleh, Chairul; Astuti, Winni
JURNAL ATOMIK Vol 7 No 2 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Plants at this time are widely used as medicine because according to some research medicinal materials, plants that have the potential as medicine do not cause too many side effects. One of the plants that are used as medicine is agarwood leaves because it is known to have several medicinal properties, one of them is as an antibacterial drug. This study was conducted to find out the secondary metabolite compounds contained in agarwood leaves and to determine the MIC value of agarwood leaves methanol extract against Streptococcus sobrinus KCCM 11898 and Salmonella typhi ATCC 422, by means of agarwood leaves extracted using methanol, phytochemical screening, and antibacterial activity tests using disc diffusion method. Phytochemical screening of agarwood leaves methanol extract results revealed alkaloids, steroids and phenolics. The MIC value of agarwood leaves methanol extract toward Streptococcus sobrinus KCCM 11898 and Salmonella typhi ATCC 422 is 1.25%.
SKRINING BAKTERI ENDOFIT PENGHASIL AMILASE, LIPASE DAN PROTEASE DARI DAUN Syzygium myrtifolium Rahmaniah, Rahmaniah; Astuti, Winni; Ruga, Ritbey
JURNAL ATOMIK Vol 7 No 2 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Endophytic bacteria are microorganisms that throughout or part of their life cycle inside plants and will not appear certain symptoms on the plant itself. Endophytic bacteria can produce enzymes. Enzymes produced by bacterial endophytes are more beneficial because the production time is faster. One of the plants that contain bacteria is Pucuk Merah (Syzygium myrtifolium). This study aims to isolate endophytic bacteria from leaves of Pucuk Merah (Syzygium myrtifolium) and to screen these endophytic bacteria as amylase, lipase and protease producers. The results of this study were obtained there are 24 isolates of endophytic bacteria from Pucuk Merah leaves. A total of 19 bacterial isolates from 24 bacterial isolates produce amylase, 1 isolate produce lipase and 24 isolates produce protease. Keywords: Endophytic bacteria, Syzygium myrtifolium, Amylase, Lipase, Protease
Mini Review: Citrus sinensis Sebagai Bioreduktor Dalam Green Synthesis Nanopartikel Hiyahara, Irfan Ashari; Hindryawati, Noor; Syaima, Husna; Akbar, Muhammad Marion; Duratulhikmah, Nur Fadhilah; Putra, Narundana Perdana; Wulandari, Siti Aprilia; Larasati, Zarra Udyani; Rahayuningsih, Rahayuningsih; Indriani, Isah Waliah
JURNAL ATOMIK Vol 8 No 1 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Green synthesis is an eco-friendly approach that provides a viable alternative to traditional physical and chemical methods for the production of nanoparticles. This technique employs non-toxic and safe materials, such as plants, microorganisms, algae, bacteria, yeast, and fungi, to generate stable and less toxic nanoparticles. Citrus sinensis, commonly known as sweet orange, is a plant that contains various active compounds. These bioactive compounds can be extracted and used as bioreductants in green synthesis of nanoparticles. This mini review aimed to provide an overview of the current state of research on the utilization of Citrus sinensis as a bioreductant in the production of nanoparticles. A systematic search strategy was employed to identify research articles that met the criteria of discussing green synthesis of nanoparticles with Citrus sinensis as a bioreductant. The nanoparticles produced using Citrus sinensis extract can be either metal nanoparticles or metal oxide nanoparticles. The review highlights the distribution of nanoparticles produced with Citrus sinensis extract, their applications, and the extraction process of Citrus sinensis commonly employed in green synthesis of nanoparticles. Hopefully this review serves as a useful reference for researchers and practitioners who are interested in employing the Citrus sinensis plant as a bioreductant in the green synthesis of nanoparticles.
POTENSI ANTIBAKTERI EKSTRAK ETANOL MENIRAN (Phyllanthus niruri L.) TERHADAP BAKTERI Streptococcus sobrinus DAN Salmonella typhi Rakasiwi, Dea; Astuti, Winni; Marliana, Eva
JURNAL ATOMIK Vol 8 No 1 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Meniran (Phyllanthus niruri L.) is one of the herb plants used as traditional medicine, such as toothache medicine and diarrhea medicine. The purposed of this study was to determined the type of secondary metabolites in the ethanol extract of meniran herb and to determined the minimum inhibitory concentration (MIC) value of the ethanol extract of meniran (Phyllanthus niruri L.) to Streptococcus sobrinus KCCM 11898 and Salmonella typhi ATCC 422. The ethanol extract of meniran was tested for phytochemicals. The MIC value of the ethanol extract of meniran herb for the test bacteria was obtained by varying the concentration of the ethanol extract of meniran herbs. Phytochemical test results showed that the ethanol extract of meniran herbs contains alkaloids, phenolics and steroids. The minimum inhibitory concentration value of the ethanol extract of meniran herb at the bacteria Streptococcus sobrinus KCCM 11898 and Salmonella typhi ATCC 422 each was 0.625%. Keywords: Phyllanthus niruri L, minimum inhibitory concentration (MIC), Streptococcus sobrinus KCCM 11898, Salmonella typhi ATCC 422
OPTIMASI KONSENTRASI L-Cysteine PADA MODIFIKASI SINTESIS NANOPARTIKEL PERAK (AgNPs) DENGAN L-Cysteine Nisaul, Cindi Fitria; Alimuddin, Alimuddin; Arif, Moh. Syaiful
JURNAL ATOMIK Vol 8 No 1 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Modification of synthesis of nanoparticles with L-Cysteine functions as a capping agent/stabilizer, so that the nanoparticles can last longer. Modification of nanoparticle synthesis by adding L-Cysteine to AgNPs and homogenizing it using a magnetic stirrer. Modification of nanoparticles (AgNPs) was monitored by observing the visible uptake. The results showed that the absorbance value increased by indicating the concentration of L-cysteine 5×10-5; 6×10-5; 7×10-5; 8×10-5; 9×10-5; 1×10-4 and the volume of L-cysteine is 4 mL.
PENENTUAN VARIASI KOMPOSISI DAN pH OPTIMUM ADSORBEN KITOSAN-Fe3O4 BERDASARKAN PERSEN PENYERAPAN ION Pb2+ Lianasari, Ika Yekti; Koesnarpadi, Soerja; Pratiwi, Djihan Ryn; Munandar, Aris
JURNAL ATOMIK Vol 8 No 1 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Previously, the synthesis of Chitosan-Fe3O4 adsorbent from magnetite (Fe3O4) made from ferrous ammonium sulfate (III) and ferrous ammonium sulfate (II) in a ratio of 3:1 was carried out. The adsorbent is adjusted with the ratio of magnetite and chitosan composition 1:1; 1:2 and 2:1 with the help of glutaraldehyde as a crosslinker. The results showed that the ratio of the ideal composition is 1:1 with % absorption that is 94.97% in 24 hour, and the optimum pH is obtained at pH 5 with % absorption of 92.18% for Pb2+ ions.
KUALITAS PAPAN KOMPOSIT PLASTIK BERDASARKAN RASIO LIMBAH PLASTIK POLIPROPILENA (PP) DENGAN CAMPURAN SERBUK KAYU SENGON (Paraserianthes falcataria L.I.C. Nielsen) DAN SEKAM PADI (Oryza sativa) Ayuningtyas, Ika Nurwidya; Dayadi, Irvin
JURNAL ATOMIK Vol 8 No 1 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The need for wood and plastic products is increasing, it is necessary to optimize the utilization of waste by processing it into plastic composite boards. This study aims to determine the best composition with raw materials of sengon wood powder (Paraserianthes falcataria L.I.C Nielsen) and rice husk powder (Oryza sativa) as filler with a ratio of 50% : 50% and polyprophylene plastic (PP) as a matrix. This treatment uses 3 compositions, P1 (40 % PP : 60 % SS) P2 (50% PP: 50% SS), and P3 (60% PP: 40 % SS ) was hot pressed with a pressure of 30 bar for 20 minutes at a temperature of 180°C with 3 replications for each treatment. The best result was obtained in the P3 (60 % PP : 40 % SS) with an average density value of 0.83 g/cm3, moisture content 1.52%, water absorption 32.16%, thickness swelling 9.34%, MoE 4,057.85 N/mm2, MoR 42.39 N/mm2 and IBS 0.21 N/mm2 Some test results have met plastic composite board standards according to JIS Particle Board A 5908-2003, JIS Plastic Board A 5741-2006 and SNI Plastic Board SNI 8154-2015.
MINI-REVIEW MENGENAI PEMANFAATAN MATERIAL BERBASIS POLIMER KOORDINASI BERPORI UNTUK PENYIMPANAN HIDROGEN Syaima, Husna; Intifadhah, Sahara Hamas
JURNAL ATOMIK Vol 8 No 2 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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This review aims to summarize the various types of Metal-Organic Frameworks (MOFs) and their utilization for hydrogen storage. MOFs have high surface area, flexibility, good stability and tunability, various active sites, and abundant raw materials. These characteristics make MOFs worthy of being considered as a new material in hydrogen storage applications. The potential for using MOFs is very broad because its properties can be determined from the choice of metal and linker. Hydrogen gas storage commonly requires high pressure tanks whereas in liquid form, it requires cryogenic temperatures due to its very low boiling point, the challenge is to synthesize MOF with high hydrogen adsorption capacity under mild conditions. Moreover, it is crucial to learn about the relationship among the pore volume and surface area of MOFs, physisorption of hydrogen, and adsorption condition.
Pengaruh Massa Biosorben Kulit Batang Kayu Jawa (Lannea coromandelica) terhadap Kapasitas Adsorpsi Ion Cd(II) Wulandari, Niken Cahyaning; Widwiastuti, Hanandayu; Yudhistia Asworo, Riska
JURNAL ATOMIK Vol 8 No 2 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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Cadmium is one of the heavy metals that can contaminate bottled drinking water (AMDK) and cause health problems if its concentration more than the maximum limit. According to SNI 01-3553-2006, the maximum concentration of cadmium in AMDK is 0.003 mg/L. An effective method to reduce Cd levels is adsorption. In this research, use material diversification by utilizing Java Bark as biosorbent. This is because the Java Bark contains tannin compounds that can bind heavy metals. One of the factor that can affect adsorption is biosorbent mass. The aims of study is determine the effect of Java Bark biosorbent mass to the adsorption capacity of Cd(II) by Atomic Absorption Spectrophotometry (AAS). Java Bark biosorbent mass used were 0.1; 0.5; 1; 1.5; and 2 g. The results showed that the biosorbent mass of 0.1 g had the largest adsorption capacity of 9.47 mg/g. Meanwhile, the adsorption capacity of the biosorbent mass of 0.5-2 g tends to decrease because the surface of the biosorbent has been saturated and particle aggregation so that Cd(II) desorption. From the results of the study, it can be concluded that the Java Bark biosorbent with a mass of 0.1 g has the largest adsorption capacity for adsorption Cd(II).
ADSORPSI ZAT WARNA TEKSTIL UNGU DARI AIR LIMBAH INDUSTRI RUMAH TANGGA SARUNG TENUN SAMARINDA SEBERANG DENGAN MENGGUNAKAN SERBUK KULIT BUAH LAI (DURIO KUTEJENSIS (HASSK.) BECC.) Oliviani, Nadira; Wirawan, Teguh; Sitorus, Saibun
JURNAL ATOMIK Vol 8 No 2 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Pewarna tekstil termasuk senyawa yang sulit terurai secara alami, sehingga dapat berdampak negatif terhadap lingkungan perairan. Penelitian ini bertujuan untuk memanfaatkan kulit buah lai yang dibuat menjadi serbuk sebagai adsorben untuk menyerap zat warna tekstil ungu pada air limbah sarung tenun Samarinda Seberang. Tahap pertama dibuat dengan membilas bubuk kulit buah lai dengan air suling mendidih, kemudian dipanggang dan diayak dengan ayakan 60 mesh. Karakterisasi dilakukan dengan menggunakan Fourier Transform Infared (FTIR) dan Scanning Electron Microscopy (SEM). Kajian adsorpsi zat warna tekstil ungu oleh serbuk kulit buah lai dilakukan dengan variasi waktu, pH dan konsentrasi. Hasil karakterisasi dengan FTIR menunjukkan adanya CO, CH bending, C=C, C=O, CC alkena,Gugus CH dan berdasarkan hasil karakterisasi SEM serbuk cangkang lainnya memiliki permukaan yang berpori. Kondisi optimum adsorpsi zat warna tekstil ungu 100 ppm untuk 25 mL dengan berat adsorben 0,01 g terjadi pada waktu kontak 2,5 menit dan pH 9. Adsorpsi zat warna tekstil ungu mengikuti pola adsorpsi isoterm Langmuir dan memiliki kapasitas adsorpsi maksimum sebesar 1176 .0486 mg/g. Aplikasi pada sampel air limbah sarung tenun ungu Samarinda Seberang dengan konsentrasi 143,5 ppm sebanyak 25 mL dan menggunakan berat optimum 0,01 g, waktu 2,5 menit dan pH 9 diperoleh %Adsorpsi sebesar 72,0119%. 5 menit dan pH 9. Adsorpsi zat warna tekstil ungu mengikuti pola adsorpsi isoterm Langmuir dan memiliki kapasitas adsorpsi maksimum sebesar 1176 .0486 mg/g.Aplikasi pada sampel air limbah sarung tenun ungu Samarinda Seberang dengan konsentrasi 143,5 ppm sebanyak 25 mL dan menggunakan berat optimum 0,01 g, waktu 2,5 menit dan pH 9 diperoleh %Adsorpsi sebesar 72,0119%. 5 menit dan pH 9. Adsorpsi zat warna tekstil ungu mengikuti pola adsorpsi isoterm Langmuir dan memiliki kapasitas adsorpsi maksimum sebesar 1176 .0486 mg/g. Aplikasi pada sampel air limbah sarung tenun ungu Samarinda Seberang dengan konsentrasi 143,5 ppm sebanyak 25 mL dan menggunakan berat optimum 0,01 g, waktu 2,5 menit dan pH 9 diperoleh %Adsorpsi sebesar 72,0119%.

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