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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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SCREENING LIPASE FROM ENDOPHYTIC BACTERIA FROM STEAM OF (Costus speciosus (J.Koenig) Sm) AND OPTIMUM WORKING CONDITION Asjayani Kurnia Sari; Winni Astuti; Djihan Ryn Pratiwi
JURNAL ATOMIK Vol 5 No 1 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Endophytic bacteria are bacteria that live in plant tissues such as the roots, leaves, and stems of plants. This research was conducted to screen lipase-producing endophytic bacteria from Pacing stem (Costus speciosus (J.Koenig) Sm.) and determine the optimum working conditions. Screening of lipase-producing bacteria on nutrient agar media containing olive oil and Rhodamine B showed that one isolate was able to produce lipase. The crude lipase extract produced from endophytic bacteria worked optimally at a pH of 7, the temperature of 40℃, and a substrate concentration of 2%. Keywords : Costus speciosus (J.Koenig) Sm., Endophytic bacteria, Lipase, Optimum Activity
RELATIONSHIP OF LOW BIRTH WEIGHT, NUTRITIONAL STATUS AND EXCLUSIVE BREAST-FEEDING WITH ARI IN INFANTS AGED 6–23 MONTHS IN KARANG ASAM PUBLIC HEALTH CENTER, SAMARINDA CITY IN 2018 Magdaleni, Agustina Rahayu; Irawan, Dimas Bagus; Sukemi, Sayidi
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Acute respiratory infection (ARI) is one of the main causes of patient visits (40%–60%) in public health centers from year to year and is always on the list of the 10 most diseases each year in health facilities, such as health centers. Populations susceptible to ARI are children less than two years old who have health problems such as malnutrition, have a history of low birth weight (LBW), do not get exclusive breastfeeding. The aim of this research is to find out the relationship between LBW, nutritional status and exclusive breastfeeding with ARI in infants aged 6–23 months in Karang Asam Public Health Center in 2018. This research is quantitative research with a design cross-sectional. The study was conducted on 87 samples, namely toddlers aged 6–23 months who visited and registered at Karang Asam Public Health Center. The sample was taken by accidental sampling. Bivariate analysis using the Chi-Square test showed a significant correlation between nutritional status and ARI in infants aged 6–23 months (0.026) and between exclusive breastfeeding and ARI in infants aged 6–23 months (0.005). Whereas there was no association between LBW and ARI in infants aged 6–23 months at Karang Asam Public Health Center in 2018 (0.078). It can be concluded that there are significant relationships between nutritional status and exclusive breastfeeding with ARI in infants aged 6–23 months. In contrast to LBW, there is no association between LBW and ARI in infants aged 6–23 months in Karang Asam Public Health Center in 2018
ENDOPHYTIC BACTERIA SCREENING FROM THE LEAVES OF OKRA (Abelmoschus esculentus L. Moench) WHICH PRODUCED LIPASE Utami, Nanda Putri; Astuti, Winni; Kartika, Rudi
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Endophytic bacteria found in plant tissues can produce enzymes, one of which is lipase. The purpose of this study was to screening endophytic bacteria from the leaves of Okra (Abelmoschus esculentus L. Moench) which produced lipases. The method used in this study is screening with media nutrient agar (NA) containing Rhodamine B and olive oil. The results showed that 4 of bacterial isolates (D1, D2, D3 and D4) from 14 endophytic bacterial isolates had lipase activity. The crude lipase extract was quantitatively tested for lipase activity by the titrimetry method. The highest lipase activity was shown by isolates with a D1 code of 1.50 U/mL.
PHYTOCHEMICAL AND ANTIOXIDANT ACTIVITY TESTS OF n-HEXANE, ETHYL ACETATE, AND ETHANOL FRACTIONS FROM SURUHAN (Peperomia pellucida (L.) Kunth) USING DPPH METHOD Lembang, Darmita Tiku; -, Daniel; Saleh, Chairul
JURNAL ATOMIK Vol 5 No 1 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Uji fitokimia dan uji aktivitas antioksidan dari tumbuhan suruhan (Peperomia pellucida (L.) Kunth) menggunakan metode DPPH telah dilakukan. Hasil dari uji fitokimia pada tumbuhan suruhan (Peperomia pellucida (L.) Kunth) ekstrak kasar bernilai positif pada alkaloid, triterpenoid, steroid dan fenolik, pada fraksi n-heksana bernilai positif pada steroid, pada fraksi etil asetat bernilai positif pada alkaloid, triterpenoid, steroid dan fenolik, pada fraksi etanol sisa bernilai positif pada alkaloid, triterpenoid, saponin dan fenolik. Berdasarkan hasil uji antioksidan dengan metode DPPH (1,1-diphenyl-2-picrylhidrazyl) menunjukkan pada ekstrak kasar, fraksi n-heksana, fraksi etil asetat dan fraksi etanol sisa memiliki nilai IC50 masing-masing sebesar 151,17; 390,87; 159,617 dan 93,886 ppm. Tingkat aktivitas antioksidan paling tinggi adalah pada fraksi etanol sisa. Hasil karakterisasi dengan GC-MS diperoleh 15 senyawa.
SYNTHESIS OF ETHYLENEDIAMIDE FROM METHYL ESTER OIL ARABICA COFFEE SEEDS (Coffea arabica. L) WITH ETHYLENEDIAMINE USING NaOCH3 CATALYST BY AMIDATION REACTION Maimunah, Siti; -, Daniel; Saleh, Chairul
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Synthesis of ethylenediamide surfactant from coffee bean oil methyl ester (Coffea arabica. L) through an amidation reaction. The synthesis process that has been carried out includes extraction, esterification and amidation of coffee bean oil content by soxhletation of 15.47% with acid number 3.15 mg KOH/g and ALB 1.58%. Coffee bean oil is converted to methyl ester through esterification and acid number is 1.50 mg KOH/g ALB level drops to 0.75% saponification number of 57.11 mg KOH / g. The most dominant composition of the coffee bean oil methyl ester based on GC-MS analysis was 48.0% methyl oleate. The FT-IR spectrum of methyl ester gives a specific absorption peak C = O ester at wave number 1745 cm-1. Methyl esters are converted to ethylenediamide through an amidation process. The resulting ethylenediamide has an acid number of 9.1 mg KOH/g and a saponification number of 3.39 mg KOH/g. The FT-IR spectrum provides specific absorption peaks for groups C=O at wave number 1639 cm1 and C-N at wave number 3302 cm-1. Ethylenediamide HLB values ​​are practically 12.5495 which includes oil in water (O/W) emulsifier surfactants.
STUDY ON PHOTODEGRADATION ACTIVITY OF RHODAMINE B BY WO3/TIO2/SIO2 COMPOSITES IN VARIOUS MATERIAL WEIGHT CONDITION Adhaina, Karina; Hindryawati, Noor; Koesnarpadi, Soerja
JURNAL ATOMIK Vol 5 No 1 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

A study on photodegradation activity of Rhodamine B by WO3/TiO2/SiO2 composites in various material weight condition has been conducted. The photocatalytic process was carried out in a closed reactor equipped with visible lamps (grow LED 10 watt). To identify crystal structure, morphology and composition of composite WO3/TiO2/SiO2, the characterization performed using Scanning Electron Microscopy-Energy Diffraction-X (SEM-EDX). The results of characterization using SEM-EDX showed that composites have a non-uniform pore morphology. The photocatalytic test showed the optimum material weight at 0.15 gram with percent degradation of Rhodamine B dyes of 85.10%.
DECREASING OF PHENOL CONCENTRATION IN BALIKPAPAN SEA WATER POLLUTED BY USING ADSORPTION METHOD Yulianto, Muhamad; Sitorus, Saibun; Gunawan, Rahmat
JURNAL ATOMIK Vol 5 No 1 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Research on decreasing of phenol concentration in the Balikpapan seawater polluted by using the adsorption method, the purpose of this study was to determine the characteristics of activated carbon and adsorption percent to adsorb phenols with time and weight variations of the adsorbent. The results of the characteristics of activated carbon using SEM show that the carbon pores after activation are greater than before activation. In addition, phenol adsorption with time variations in seawater samples obtained optimal time at 30 minutes with 62% and the weight variation of the adsorbent obtained percentage of maximum adsorption at a weight of 12 grams is 51.11%.
APPLICATION OF UV SPECTROPHOTOMETER AND HPLC ON ANALYSIS OF CAFFEINE CONTENT IN ARABICA AND ROBUSTA COFFEES Prasetyo, Dedy; Sitorus, Saibun; Gunawan, Rahmat
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Analysis of caffeine content in Arabica coffee and Robusta coffee using Ultra Violet (UV) spectrophotometers and High Performance Liquid Chromatography (HPLC) was carried out. Coffee samples were soxhleted with 96% ethanol with the rotation variation used, namely 4, 6, 8, 10 and 12. The extract was dissolved in 96% ethanol and tested with a UV spectrophotometer. The results obtained caffeine content in arabica coffee for 4, 6, 8, 10 and 12 rotations are 1.347 mg/L, 1.631 mg/L, 1.953 mg/L, 2.868 mg/L and 3.764 mg/L respectively. While the caffeine content obtained by Robusta coffee for 4, 6, 8, 10 and 12 turns are 1.820 mg/L, 2.258 mg/L, 2.741 mg/L, 3.814 mg/L and 4.781 mg/L, respectively. Caffeine content in Arabica and Robusta coffee were analyzed by HPLC. The results obtained in Arabica coffee are retention time of 5.079 minutes, area of 1265348 and height of 56539 and in Robusta coffee the retention time is 5,083 minutes, the area is 1249273 and the height is 55700.
UTILIZATION OF Salvinia molesta AS Fe(II) AND Mn(II) ADSORBENTS Wiranata, Muhammad Harjan; Sitorus, Saibun; Widodo, Nanang Tri
JURNAL ATOMIK Vol 5 No 1 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Research on utilization of Kiambang powder (Salvinia molesta) as adsorbent Fe (II) and Mn (II) in artificial samples. The method used is adsorption with a modified activated adsorbent. From the results of the study obtained optimum conditions for adsorption of Fe (II) at pH of 4, time of 30 minutes and adsorption capacity of 0.158 mg/g. The optimum conditions for the adsorption of Mn metal ions at pH of 6, time of 60 minutes and adsorption capacity of 2.522 mg/g.
THE MANUFACTURING OF SILICA GEL FROM BAMBOO LEAF ASH (Dendrocalamus asper (Schult. f) Backer ex Heyne) AND THE APPLICATION FOR ADSORPTION Cd (II) ION -, Yasrin; -, Alimuddin; Panggabean, Aman Sentosa
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The research about silica gel manufacturing from bamboo leaf ash (Dendrocalamus asper (Schult.) Backer ex Heyne) and the application for Cd (II) ion adsorption has been done. The adsorption of Cd (II) ion done by some varieties, such as pH, concentration, and contact time. The result of the research showed the optimum pH was 8, the optimum concentration was 4 ppm and the contact time was 60 minutes. The adsorption capacity was 0.388 mg/g and the percentage of recovery was 93.44%.

Page 10 of 20 | Total Record : 194

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