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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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ISOLATION OF ENDOPHYTIC BACTERIA FROM OKRA FRUIT (Abelmoschus esculentus L. Moench) Mikdariawan, Adha; Astuti, Winni; Marliana, Eva
JURNAL ATOMIK Vol 6 No 1 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Endophytic bacteria is a bacteria that live in plant tissues without disrupt the plant's life cycle. This research aims to isolate endophytic bacteria from okra fruit (Abelmoschus esculentus L. Moench). Before isolation, okra fruit was sterilized by the outer surface with aquadest, 5.25% NaClO and 95% ethanol. The okra fruit sample is then cut and the inside of the okra fruit is cultured in a nutrient agar (NA). The results of this test indicate that there are endophytic bacteria that grow characterized by the presence of turbid areas around the sample. The results of isolation of endophytic bacteria using the method of stocking cup were obtained by 28 isolates of endophytic bacteria.
PHYTOCHEMICAL TEST AND ANTIBACTERIAL ACTIVITY FROM MERUNG LEAVES (Coptosapelta tomentosa) AGAINST Staphylococcus aureus AND Propionibacterium acnes BACTERIA Ulfa, Yulyanti Sartika; Kartika, Rudi; Saleh, Chairul
JURNAL ATOMIK Vol 6 No 1 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Penelitian tentang uji fitokimia dan aktivitas antibakteri daun Merung (Coptosapelta tomentosa) terhadap bakteri Staphylococcus aureus dan Propionibacterium acne telah dilakukan. Penelitian ini berupa uji fitokimia dan uji aktivitas antibakteri dengan metode kertas cakram dari ekstrak kasar, fraksi metanol dan fraksi etil asetat pada daun merung (Coptosapelta tomemtosa). Hasil penelitian ini menunjukkan bahwa ekstrak kasar, fraksi metanol dan fraksi etil asetat mengandung senyawa metabolit sekunder dan pada uji aktivitas antibakteri dari ekstrak kasar, fraksi metanol dan fraksi etil asetat menunjukkan adanya aktivitas antibakteri terhadap bakteri Staphylococcus aureus dengan range MIC masing-masing sebesar 2,5% dengan diameter zona hambat 20 mm dan pada bakteri Propionibacterium acne tidak memiliki aktivitas antibakteri.
SYNTHESIS OF CHITOSAN-MAGNETITE NANOPARTICLES CROSS-LINKED TRIPOLYPHOSPHATE AS ANTIBACTERIAL Salmonella typhi AND Staphylococcus aureus Mahyati, Agus; Koesnarpadi, Soerja; -, Erwin
JURNAL ATOMIK Vol 6 No 1 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Magnetite is widely used in various fields of separation, biochemistry, medical and environment. Modification of nanoparticle magnetite binding with chitosan is recommended for many biomedical applications, especially as a drug delivery system because in addition to its non-toxic, biodegradable and biocompatible characteristics. Another advantage of biomedical benefits as antimicrobial is that it can increase antibacterial activity and has a more pronounced effect on gram-negative and gram-positive bacteria. Synthesis and characterization of chitosan-magnetite cross-linked tripolyphosphate as an antibacterial of S. typhi (Gram negative) and S. aureus (Gram positive) has been carried out. The phase of this research was initiated by the synthesis of FeSO4.7H2O and FeCl3.6H2O magnetite with a mass ratio of Fe (II): Fe (III) = 2: 3, using the co-precipitation method. In the second stage where the cross-linking of chitosan with TPP cross-linker to form ferrogel. In the third stage the synthesis of TPP-chitosan-magnetite in a ratio of 1: 4, with a slight addition of NH4OH as participant material. The results showed that FT-IR on TPP-chitosan-magnetite has a unique spectrum, XRD results showed the crystal structure of TPP-chitosan-magnetite did not change. Surface morphology shows that TPP-chitosan-magnetite is a spherical surface. Chitosan-Magnetite material has greater antibacterial activity than chitosan and magnetite bacteria S. typhi (Gram negative) and S. aureus (Gram positive).
SYNTHESIS OF MALEIL ACETATE THROUGH ESTERIFICATION REACTIONS OF MALIC ACID USING ANHYDRATE ACETATE Muhammad Rifky Rizqullah; Daniel -; Eva Marliana
JURNAL ATOMIK Vol 6 No 1 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research has been carried out on the synthesis of maleil acetate through esterification reactions of malic acid using anhydrate acetate. Esterification of malic acid was carried out with a ratio of anhydrate acetate 1:2 to produce maleil acetate with a yield of 72.08%. The formed maleil acetate then characterizes using the FT-IR instrument. The result of FT-IR analysis which will indicate that maleil acetate has formed is that the hydroxyl group from malic acid has been converted into an ester group from the esterification reaction. The wave number of the hydroxyl group of malic acid is 3448.72 cm-1 and the ester group is the result of an esterification reaction at wave number 1735.93 cm-1, indicating that maleil acetate has been formed.
PHYTOCHEMICAL TEST AND ANTIOXIDANT ACTIVITY TEST OF n-HEXANE FRACTION EXTRACT, ETHYL ACETATE AND REMAINED ETHANOL FROM LEAF OF SUNGKAI (Peronema canescens Jack.) USING DPPH METHOD Pindan, Neli Peni; -, Daniel; Saleh, Chairul; Magdaleni, Agustina Rahayu
JURNAL ATOMIK Vol 6 No 1 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research on phytochemical test and antioxidant activity on sungkai leaf extract (Peronema Canescens Jack.) using DPPH (1,1-diphenyl-2-picrylhydrazyl). Phytochemical test result showed that secondary metabolites in crude extracts were alkaloids, flavonoids, phenolics, triterpenoids, steroids and saponins, secondary metabolites in n-hexane were flavonoids, triterpenoids and steroids, secondary metabolites ethyl acetate were alkaloids, triterpenoids and steroids and secondary metabolites in residual ethanol is alkaloids, flavonoids, phenolics and steroids. The IC50 values obtained in each crude extract, n-hexane, ethyl acetate and ethanol residue respectively: 29.549 ppm; 607.475 ppm; 12.986 ppm; 15.766 ppm. The highest level of antioxidant activity is in ethyl acetate fractions. Charaterization results with GC-MS obtained by alkanes, alkenes, alcohols and fatty acids.
VALIDASI METODE “RAPID TEST” TERHADAP PENENTUAN PARAMETER TOTAL MOISTURE (AR), ASH CONTENT (AR) DAN CALORIFIC VALUE DI PT. KALTIM PRIMA COAL pakasi, Resy; Panggabean, Aman Sentosa; Gunawan, Rahmat
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Telah dilakukan uji “Validasi Metode Rapid Test Terhadap Penentuan Parameter Total Moisture (ar), Calorific Value (ar) dan Ash Content (ar) Di PT. Kaltim Prima Coal”. Penelitian ini bertujuan untuk hasil perbandingan metode rapid test terhadap standar yang telah di tetapkan atau di gunakan oleh PT. Kaltim Prima Coal pada sampel batubara dengan optimalisasi waktu saat preparasi tanpa tahap pengeringan (as received) dengan batubara ukuran 11,2 mm yang nanti akan di validasi untuk mengetahui reliable apa tidak digunakan untuk kegiatan operasional di laboratorium.Penelitian dilakukan dengan cara dua macam pengambilan data yaitu data standar dan data rapid, meliputi parameter Total Moisture, Calorific Value dan Ash Content. Lalu dilakukan optimalisasi waktu saat preparasi yaitu tanpa tahap pengeringan dengan batubara ukuran 11,2 mm. Kemudian dilakukan uji validasi metode uji bias dan uji t.Berdasarkan uji validasi metode diperoleh hasil Total Moisture dan Ash Content pada batubara ukuran 11,2 mm tanpa tahap pengeringan dapat digunakan dengan tetap memperhatikan variance yang ada, sedangkan pada analisa Calorific Value tanpa tahap pengeringan tidak dapat digunakan melihat hasil yang diperoleh jauh dalam range yang ditentukan.
Adsorpsi Fenol oleh Arang Aktif Ampas Kopi Teraktivasi Fisik dan Kimia Nurfarizha, Harisma; Wirawan, Teguh; Widodo, Nanang Tri
JURNAL ATOMIK Vol 6 No 2 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Activated charcoal was prepared from coffee grounds using carbonization at 500⁰C as a physical activation and also by chemical activation using sulphuric acid. Chemical characterization of the activated charcoal was performed by Fourier Transform Infrared Spectroscopy. The optimum conditions for phenol adsorption was attained at pH 4 and 60 minutes of contact time. Adsorption isotherms from Freundlich
UJI FITOKIMIA DAN ANTIBAKTERI EKSTRAK ETANOL BIJI MAHONI (Swietenia mahagoni (L.) Jacq) Arwidhiah, Nanda; Saleh, Chairul; Astuti, Winni
JURNAL ATOMIK Vol 6 No 2 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Phytochemical test and antibacterial activity of ethanol extract of Mahoni seed (Swietenia mahagoni (L.) Jacq) have been done. The extraction of Mahoni seed samples was carried out by the maceration method using ethanol as a solvent. An antibacterial activity test was carried out using the agar diffusion method. Phytochemical tests results show that ethanol extract of Mahoni seeds has secondary metabolites of alkaloid, triterpenoid, and phenolic compounds. The antibacterial activity test results obtained MIC values for Streptococcus mutans bacteria were 1.25-2.5% and for Salmonella typhi bacteria at 0.625-1.25%. Ethanol extract of Mahoni seeds has broad-spectrum antibacterial activity.
Daya Antibakteri Extrak Metanol Batang Melicope glabra (BI.) T.G. Hartley Purnamasari, Ade Rezki; Astuti, Winni; Marliana, Eva
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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ABSTRAK Uji fitokimia dan uji aktivitas antibakteri ekstrak metanol batang Melicope glabra (BI.) T.G. Hartley telah dilakukan. Ektraksi sampel batang Melicope glabra dilakukan dengan metode maserasi menggunakan pelarut metanol. Uji aktivitas antibakteri dilakukan menggunakan metode difusi agar. Hasil uji fitokimia menunjukkan ekstrak metanol batang Melicope glabra mengandung senyawa metabolit sekunder flavonoid, fenolik, triterpenoid dan steroid. Nilai MIC (Minimum Inhibitory Concentration) ekstrak metanol batang Melicope glabra (BI.) T.G. Hartley untuk bakteri Salmonella typhi adalah pada konsentrasi 1,25%, sedangkan untuk bakteri Staphylococcus aureus adalah pada konsentrasi 2,5%. Ekstrak metanol batang Melicope glabra (BI.) T.G. Hartley memiliki aktivitas antibakteri dengan spektrum luas. Kata Kunci : Melicope glabra (BI.) T.G. Hartley, aktivitas antibakteri, metabolit sekunder
ADSORPSI FENOL MENGGUNAKAN ADSORBEN KOMPOSIT Fe3O4-ARANG AKTIF AMPAS KOPI Reknosari, Elen; Wirawan, Teguh; Koesnarpadi, Soerja
JURNAL ATOMIK Vol 6 No 2 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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ABSTRAK Adsorpsi fenol menggunakan adsorben komposit Fe3O4-Arang aktif ampas kopi telah dilakukan. Adsorben komposit Fe3O4-Arang aktif ampas kopi disintesis dari FeSO4.7H2O dan FeCl3.6H2O dengan perbandingan 3:2 kemudian dikomposit dengan arang aktif ampas kopi. Adsorben komposit Fe3O4-Arang aktif ampas kopi dikarakterisasi dengan Fourier Transform Infared (FTIR) dan Scanning Electron Microscopy (SEM) serta dilakukan uji adsorpsi terhadap fenol. Hasil karakterisasi dengan Fourier Transform Infared (FTIR), muncul peak 1604,77 cm-1 menunjukkan adanya serapan C=O yang menyatakan bahwa ampas kopi telah membentuk zat karbon. Selain itu adsorben komposit Fe3O4-arang aktif ampas kopi muncul peak pada panjang gelombang 509,21 cm-1 yang merupakan gugus Fe-O menunjukkan bahwa nanopartikel Fe3O4 telah berhasil tercangkok pada struktur arang aktif. Kondisi optimum adsorpsi fenol menggunakan adsorben komposit Fe3O4-arang aktif ampas kopi adalah pada waktu kontak 30 menit dan pH 5. Kata kunci: Adsorpsi, Fenol, Magnetit, Arang Aktif, Ampas Kopi

Page 13 of 20 | Total Record : 194

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