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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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PENGHAMBATAN AKTIVITAS α-GLUKOSIDASE DARI EKSTRAK METANOL BUNGA BUGENVIL (Bougainvillea glabra Choisy) Puspitasari, Intan Dessy; Saleh, Chairul; Hairani, Rita; Ruga, Ritbey
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1276

Abstract

The test of Phytochemical screening and antidiabetic activity of methanol extract of bugenvil (Bougainvillea glabra Choisy) flower against α-glucosidase inhibition have been conducted. This study aims to determine the content of secondary metabolite compounds and the effectiveness of the methanol extract of bugenvil flower against α-glucosidase activity. Phytochemical test showed that the methanol extract contained secondary metabolite compounds namely alkaloids, flavonoids, steroids, phenolics and saponins. By 50 µg/mL, the methanol extract of bugenvil flower can inhibit α-glucosidase activity with a percent inhibition value of 79.42% while acarbose as a positive control in this study exhibited antidiabetic activity against α-glucosidase of 99.30% at a concentration of 0.00006 µg/mL.
Adsorption Of Dye From Household Industrial Wastewater Of Samarinda Seberang Weaving Gloves Using Adsorbent From Activated Charcoal Lai Fruit Powder (Durio Kutejensis (Hassk.) Becc.) Sari, Riska Alif Kartika; Wirawan, Teguh; Sitorus, Saibun
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1271

Abstract

Textile dyes include compounds that are difficult to decompose naturally. In the waters is a serious environmental problem because it can have a negative impact. This study aims to utilize lai fruit peel which is used as activated charcoal as an adsorbent to adsorb purple dyes in woven sarong waste water. The first stage of making activated charcoal is through carbonation in a furnace at 500oC for 30 minutes. Activation was carried out chemically by immersing it in 2 M H2SO4 solution for 24 hours. FTIR characterization of the resulting activated carbon was carried out to determine its functional groups and SEM characterization to determine its morphology. The results of FTIR characterization of activated carbon from lai fruit peel powder have functional groups -CO- and –OH, while SEM characterization of activated carbon from lai fruit peel powder is in the form of fibers with open pore surfaces that are spread on the surface and cavity walls of the activated charcoal of lai fruit peel powder. The adsorption process was carried out using the bath method and the concentration of the purple dye was determined using a UV-Vis spectrophotometer. The results showed that the adsorption of purple dye by activated charcoal was optimal at contact time of 1 minute and at pH 8. Adsorption of purple dye followed by the Freundlich adsorption pattern and had a maximum chemical adsorption capacity of 55.209 mg/g.
SINTESIS DAN KARAKTERISASI NANOPARTIKEL PERAK TERMODIFIKASI KITOSAN MENGGUNAKAN REDUKTOR NaBH4 Az Zahra, Upi Fathimah; Hindryawati, Noor; Panggabean, Aman Sentosa
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1406

Abstract

The research about synthesis of chitosan-modified silver nanoparticles using NaBH4 reducing agents has been carried out. This research aims to determine the optimum AgNO3 concentration, optimum pH and optimum stirring time. The chitosan-modified silver nanoparticles obtained were then characterized using a UV Vis Spectrophotometer, Particle Size Analyzer and Transmission Electron Microscopy instruments. The results of measurements using a UV-Vis Spectrophotometer, the synthesis of chitosan-modified silver nanoparticles was obtained was obtained at the optimum condition of AgNO3 concentration of 3x10-3 M, pH 4 and the optimum stirring time was 2 hours. The formation of AgNPs is characterized by the presence of typical absorption peaks at maximum wavelengths of 402 nm-434 nm. Keywords: Silver Nanoparticles, Chitosan, NaBH4
AKTIVITAS AMILASE PENDEGRADASI PATI MENTAH DARI BAKTERI TANAH TEMPAT PEMBUANGAN AKHIR BUKIT PINANG Putri, Amanda Aulia; Astuti, Winni; Pratiwi, Djihan Ryn
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1408

Abstract

Raw starch-degrading amylase (RSDA) is a hydrolytic enzyme that can degrade raw starch into glucose. This study was conducted to obtain raw starch-degrading amylase-producing bacteria from the soil of the Bukit Pinang Landfill, Samarinda City. Isolation of bacteria using the spread plate method. Screening of RSDA-producing bacteria using nutrient media to contain raw starch. Isolation of bacteria obtained 10 single colonies of bacteria. The isolated bacteria were selected for their ability to produce RSDA. All single colonies of bacteria could produce RSDA and their activity was tested quantitatively using the 3,5 Dinitrosalicylic Acid (DNS) method. Bacteria with the TPA 1 colony code had the highest activity of 3.837 U/mL.
SELEKSI BAKTERI POTENSIAL PENGHASIL ENZIM HIDROLITIK DARI SAMPEL TANAH TEMPAT PEMBUANGAN AKHIR BUKIT PINANG SAMARINDA Admaja, Junior Try; Astuti, Winni; Kartika, Rudi
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1401

Abstract

Bacteria are one of the microorganisms that have the potential to produce hydrolytic enzymes. This research was carried out to isolate bacteria from the soil of the Bukit Pinang Samarinda Final Disposal Site and select bacteria that produce cellulase, protease and lipase enzymes. Bacteria from landfill soil were isolated using the spread plate method and 10 single colony bacterial isolates were selected which were then coded TPA 1 – TPA 10. The results of the selection of bacteria producing hydrolase enzymes showed that 9 isolates were capable of producing protease enzymes, 6 isolates were capable of producing cellulase enzymes and 4 isolates were capable of producing cellulase enzymes. The isolate was able to produce the lipase enzyme.
PEMANFAATAN LIMBAH NON B3 FLY ASH DAN BOTTOM ASH DARI KEGIATAN PLTU SEBAGAI SUBTITUSI BAHAN BAKU PEMBUATAN PAVING BLOCK DAN BATAKO Erzha, Nutfahryza; Sitorus, Saibun; Panggabean, Aman Sentosa
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1416

Abstract

The use of coal in power plant activities will produce solid waste in the form of fly ash and bottom ash. Alternative management to reduce the volume of ash waste is through utilization. Therefore, this study aims to determine the toxic characteristics of bottom ash fly ash waste, determine the physical properties of the compressive strength of paving blocks and bricks from the substitution of fly ash and bottom ash, as well as the most optimal proportion of substitution of the product based on the compressive strength parameter. Compatibility of Toxic Waste Characteristics is carried out through the Toxicity Characteristic Leaching Procedure (TCLP) test. Variation of optimal substitution for compressive strength is known through variations of fly ash and bottom ash substitution, for brick products which are 5%, 10%, 15%, and 20%, and for paving blocks which are 10%, 20%, 30%, and 40%. Through the TCLP test, it is known that the waste is below the TCLP A and TCLP B quality standards so it can be categorized as non toxic and hazardous waste. The results of using fly ash and bottom ash in brick products meet the requirements for compressive strength according to SNI 03-0349-1989. The results of using fly ash and bottom ash in paving block products meet the requirements for compressive strength according to SNI 03-0691-1996. The optimal variation of fly ash substitution for bricks is with 5% fly ash substitution that produces a compressive strength value of 201.42 kg/cm2 and paving blocks with 10% fly ash substitution that produces a compressive strength value of 225.01 kg/cm2. The optimal variation of bottom ash substitution for brick is with 5% bottom ash substitution that produces a compressive strength value of 226.30 kg/cm2 and for paving block is with 10% bottom ash substitution that produces a compressive strength value of 308.22 kg/cm2.
SKRINING FITOKIMIA DAN UJI TOKSISITAS MENGGUNAKAN BRINE SHRIMP LETHALITY TEST (BSLT) DARI EKSTRAK DIKLOROMETANA RIMPANG TEMU KUNCI (Boesenbergia rotunda) Jonathan, Jonathan; Ruga, Ritbey; Hairani, Rita
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1407

Abstract

The rhizome of Boesenbergia rotunda (temu kunci) is one of medicinal plants having potential for medicinal, supplementary food and drink due to its biological activities. The aims of this research are to identified the secondary metabolite compounds present in the dichlorometane extract of finger-root rhizomes through phytochemical screening using thin layer chromatography (TLC) method and to investigated its toxicity against Artemia salina L. shrimp larvae by using Brine Shrime Lethality Test (BSLT). The result of phytochemical analysis showed that the dichloromethane extract contains secondary metabolite compounds including flavonoids, phenolics and triterpenoids while the toxicity test of the extract showed its LC50 value of 303.68 µg/mL. It was indicated that the extract could be classified as toxic.
ADSORPSI ZAT WARNA RHODAMINE B MENGGUNAKAN SERBUK KULIT BUAH LAI (Durio kutejensis (Hassk.) Becc.) SEBAGAI ADSORBEN Sam, Risna Fitriani; Wirawan, Teguh; Aziz, Abdul
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1414

Abstract

Rhodamine B dye, which is widely used in the textile industry, has the potential to reduce environmental quality because it is difficult to decompose and makes it a toxic substance. Therefore, textile industry waste must be processed first before being released into the environment, for example through an adsorption process. In this research, the adsorbent was made from Lai fruit peel powder and the optimum conditions and performance of the adsorbent were determined based on the optimum pH, optimum time, adsorption capacity, type of isotherm (Langmuir or Freundlich), and adsorption thermodynamics. The adsorbent was made by washing the lai fruit peel powder repeatedly using boiling distilled water until the filtrate was colorless, then heating, crushing and sifting with a 60 mesh sieve. Lai fruit peel powder was chemically activated by soaking in 2 M HCl solution for 24 hours. The FT-IR spectrum of Lai fruit peel powder shows the presence of C-O, C=C, C-H, and O-H stretching vibration groups. Based on Scanning Electron Microscopy (SEM), activated lai fruit peel powder shows more open pores. The absorption value was determined using a UV-Vis spectrophotometer. The optimum conditions for adsorption of rhodamine B dye occur at pH 5, contact time 75 minutes, maximum adsorption capacity of 118.5422 mg/g following the Freundlich isotherm adsorption pattern and adsorption occurs physically.
POTENSI AKTIVITAS ANTIOKSIDAN EKSTRAK METANOL DAUN SINGKIL(Premna corymbosa Roxb & Willd.) Dewi, Camelia Eugenia; Saleh, Chairul; Ryn Pratiwi, Djihan; Magdaleni, Agustina Rahayu; Daniel, Daniel
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1431

Abstract

Antioxidant and sunscreen activity tests have been carried out on the methanol extract of singkil leaves(Premna corymbosa Roxb & Willd.) in vitro with the 1.1-diphenyl-2-picrylhydrazil (DPPH) radicalscavenging method using a spectrophotometer UV-Vis. This research aims to determine the antioxidantof singkil leaf. Based on the results of the phytochemical test, it is known that the methanol extract ofsingkil leaves contains alkaloids, flavonoids, phenolics, quinone and steroids. The IC50 value ofmethanol extract of singkil leaves, ia 50.77; in the moderate to strong antioxidant category.
ADSORPSI METILEN BIRU DENGAN MENGGUNAKAN ARANG AKTIF DARI DAUN TANAMAN DOYO (Curculigo latifolia) Pasa, Jessica Indriyani; -, Aldiansyag; Septiani, Risky; Prastika, Nanda Diah; Markus, Rio Mardani; Lestari, Sri; -, Sukemi; Gunawan, Rony
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1393

Abstract

Methylene blue adsorption research has been carried out using activated charcoal from Curculigo latifolia. This research aims to determine the characteristics of the Curculigo latifolia activated charcoal made and the optimum conditions for the adsorption of methylene blue by Curculigo latifolia activated charcoal. Physically activated charcoal is made from Curculigo latifolia which is carbonized at 400°C for 30 minutes, then the physically activated charcoal is soaked in 0.5 M H2SO4 solution for 24 hours to produce chemically activated charcoal. The results showed that the optimum pH for methylene blue adsorption obtained from the Curculigo latifolia activated charcoal adsorbent was physically activated at pH 7 and chemically activated at pH 9. The optimum contact time obtained from the physically and chemically activated Curculigo latifolia activated charcoal adsorbent occurred at a contact time of 15 minutes and 30 minutes. Adsorption of methylene blue by chemically activated Curculigo latifolia activated charcoal follows the Langmuir adsorption isotherm while physically activated charcoal follows the Freundlich adsorption isotherm. The optimum adsorbent mass of physically and chemically activated charcoal is 0.2 g and 0.25 g.

Page 18 of 20 | Total Record : 194

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