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NOOR HUBDRYAWATI
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Jurnal Kimia Mulawarman
Published by Universitas Mulawarman
ISSN : 16935616     EISSN : 24769258     DOI : DOI: https://doi.org/10.30872/jkm
Core Subject : Science,
Chemistry
Journal of Kimia Mulawarman is a peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry, including educational chemistry and applied chemistry.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 224 Documents
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KARAKTERISASI DAN SKRINING FITOKIMIA DAUN KEREHAU (Callicarpa longifolia Lamk.) Supomo -; Risa Supriningrum; Risaldi Junaid
JURNAL KIMIA MULAWARMAN Vol 13 No 2 (2016)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Plants kerehau empirically used to treat swelling, abdominal pain and diarrhea. Kerehau leaf research data related to quality botanicals have not done, this causes the botanicals and extracts do not have a standard. The purpose of this study to determine the chemical characterization and the compound leaf extract botanicals and kerehau. The research object leaves kerehau obtained from the village of Muara District Muara Aloh Muntai, made crude drug samples are extracted using maceration method by ethanol 70%. Then examined the macroscopic, microscopic, these characterizations include: water assay, assay of soluble extract in water, soluble extract assay of ethanol, the determination of ash content and assay of acid insoluble ash is then performed phytochemical screening. Data were analyzed using descriptivemethods. The characterization results simplicia, macroscopic kerehau has green leaves, pointed leaf tip, leaf base tapering, serrated leaf edge, the shape of elongated leaves, a single leaf, leaf arrangement pinnate, pinnate leaves arrangement of bones, flesh soft thin leaves, leaf length 10,5- 14 cm and 4-6 cm wide leaves. Microscopic hair bulbs discovered fragment identifier cover, file vessels, glands hair, and stomata calcium oxalate crystal anisositik. The water content of 9.6%, water soluble extract content of 17.7% ethanol soluble extract content of 11.3%, ash content of 6%, acid insoluble ash content of 1%. The characterization results extract ethanol, 15% water content, water soluble extract content of 40.4% ethanol soluble extract content of 39.9%, ash content of 3.5%, acid insoluble ash content of 0.3%. While the results of the identification of classes of chemical compounds, known kerehau leaf contains flavonoids, tannins, saponins and terpenoids.
Isolasi dan Identifikasi Senyawa Kimia dari Ekstrak n-heksan Batang Benalu Tanaman Jeruk (Dendrophtoe pentandra (L.) Miq.) rizky maulida amalia hanif; Rudi Kartika; Partomuan Simanjuntak
JURNAL KIMIA MULAWARMAN Vol 14 No 1 (2016)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Telah dilakukan penelitian isolasi dan identifikasi senyawa kimia dari ekstrak n-heksan batang benalu tanaman jeruk (Dendrophtoe pentandra (L.) Miq.). Penelitian ini dilakukan dengan metode maserasi dengan pelarut n-heksan, etil asetat, etanol dan air, uji fitokimia, uji mortalitas larva udang dengan metode BSLT (Brine Shrimp Lethality Test) serta isolasi dengan kromatografi kolom dan identifikasi dengan menggunakan spektrofotometer Fourier Transform Infra Red (FT-IR) dan Kromatografi Gas – Spektrometri Massa (KG-SM). Dari hasil uji mortalitas larva udang didapatkan bahwa ekstrak n-heksan adalah ekstrak yang paling aktif kemudian dilanjutkan pada proses isolasi dan diperoleh isolat n-heksan 3.2 yang memiliki nilai toksisitas (LC50) sebesar 92,197 ppm. Berdasarkan hasil analisis dengan spektrofotometer FT-IR dan KG-SM senyawa kimia yang diduga terdapat dalam ekstrak n-heksan batang benalu tanaman jeruk (Dendrophtoe pentandra (L.) Miq.) adalah senyawa Stigmasterol.
OPTIMASI KINERJA ANALITIK PADA PENENTUAN KADAR FOSFOR SEBAGAI P2O5 PADA ABU BATUBARA DENGAN METODE SPEKTROFOTOMETER VISIBLE Eka Apriska S Kusuma; Aman Sentosa Panggabean; Yasser Arafat
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The research on optimization of analytical performance in the determination of phosphorous as P2O5 content in the coal ash with visible spectrophotometer method has been done. In this research was conducted validation visible spectrophotometer method to establish the levels of phosphorus in coal ash. Validation parameters used in this research were accuracy, precision, linearity, LOD, LOQ and ruggedness methods. From the result of this research, accuracy was stated in percent recovery, precision was stated as a RSD percent, withthe equation of linearity as y=0,1768x - 0,0076. From the equation, it will be obtained LOD and LOQ values. And endurance test methods that varied the length of it digest time. From the results it can be concluded that the determination of phosphorous content in the coal ash using visible spectrophotometer method has good precisionand accuracy, and able to be justifiedKeywords: Coal, Phosporous, Analytical Performance, Visible Spectrophotometer.
ANALISIS AMONIAK TERLARUT PADA TANAMAN LAMUN (Thalassia testudinum) DALAM MEDIA AIR Dewi Sundari; Alimuddin Alimuddin; Rahmat Gunawan
JURNAL KIMIA MULAWARMAN Vol 12 No 2 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

A research about the analysis of dissolved ammonia in seagraas plants (Thalassia testudinum) at water’s media has been carried out. A research aimed to determined the ammonia concentration in the water’s seagrass plants, and also the effect of ammonia variations concentration at the growth water media after planting for 1, 2, 3 dan 4 weeks, and determined the ability of seagrass to absorb dissolved ammonia. Water as its plant media was placed in to 4 cups that have been added dissolved ammonia as 0, 3, 5 dan 7 mg/L respectively. The concentration of dissolved ammonia from water and seagrass samples were measured by phenate method using a visible spectrophotometer at a wavelength of 650 nm. The result showed that during the planting of four weeks the concentration of dissolved ammonia in the water as its plant media decreased while the concentration of dissolved ammonia in seagrass planst increased. The results of the first week, concentration of dissolved ammonia at growth water’s media, respectively for 9,0234 mg/L; 12,5562 mg/L; 14,5293 mg/L and 16,9269 mg/L. After the fourth week, the concentration of dissolved ammonia decreased as 4,0520 mg/L; 7,3479 mg/L; 8,2848 mg/L and 8,4061 mg/L
AMPAS TAHU SEBAGAI NUTRISI Saccharomyces cerevisiae DALAM PEMBUATAN BIOETANOL DARI BERAS MERAH (Oryza nivara) DENGAN PROSES FERMENTASI Monica Shara Sinaga
JURNAL KIMIA MULAWARMAN Vol 18 No 1 (2020)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v18i1.788

Abstract

Research on the production of bioethanol from red rice flour starch (Oryza nivara) through enzymatic hydrolysis process and fermentation by Saccharomyces cerevisiae with the addition of tofu dregs as a nutrient source of microorganisms has been conducted. The process of bioethanol production consisted of hydrolysis, fermentation, distillation and ethanol content analysis using gas chromatography instrument. This research was conducted to determine the concentration of nutrients and the duration of fermentation to produce optimal ethanol levels. The hydrolysis process is carried out enzymatically through the liquification stage using ?-amylase and gluco-amylase at the saccharification stage. Then the fermentation process continued with a variation of 7, 8 and 9 days using Saccharomyces cerevisiae with the addition of tofu dregs concentration 0.5 %, 1 % and 1.5 % (w/v). The highest ethanol levels obtained from gas chromatography analysis was the addition of tofu dregs 1 % (w/v) and fermentation time for 8 days, with ethanol content obtained at 59.325 %.
UJI BIOAKTIVITAS PADA EKSTRAK KASAR ETANOL, FRAKSI n-HEKSAN, ETIL ASETAT DAN ETANOL-AIR DARI DAUN ANDONG (Cordyline terminalis Kunth) Ritson Purba; Enos Tangke Arung; Teddy Tranoto
JURNAL KIMIA MULAWARMAN Vol 11 No 2 (2014)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Phytochemical, brine shrimp lethality and antibacterial activity tests in each fraction from Andong leaves extract(Cordyline terminalis Kunth) that came fromUnmul Samarinda botanical garden, Kalimantan Timur has been carried out. The leaf was extracted with ethanol andconcentrated by using rotaryevaporator. The crudeethanol extract was fractioned with n-hexane, and ethyl acetate. Based on the secondary metabolites phytochemical test of the Cordyline terminalis Kunth leaves show that crudeethanol extract is contain phenol, saponin and steroid.n-hexane fraction iscontain steroid.Ethylacetate fraction is contain phenol and steroid. And ethanol-water fraction is contain phenol and saponin. Brine shrimp lethality test exhibit mortality rate of Artemiasalina (L) by Probit SAS analysis to determine lethal concentration 50% (LC 50 ) value. The test showed that the most active wascrudeethanol extract with LC 50 value of 26.8788 ppm. Antibacteria activity test of extracts for Bacillus cereus bacteria (positiveGram) andEscherichia coli (negativeGram) were carried out by paper disk method. The test showed that the most active were ethyl acetate extract with minimum inhibitor consentration of 2-10% which clear zone diameter was 6,4 mm on Bacillus cereus bacteria and 6 mm on Escherichia colibacteria.Keywords: Phytochemical, Antibacteria activity, LC 50
PEMBUATAN SENYAWA METIL ESTER YANG DITURUNKAN DARI DARI MINYAK BIJI BINTARO (Cerbera manghas L.) SEBAGAI BAHAN BAKU DASAR PEMBUATAN SURFAKTAN Ilham Burhanuddin; Daniel Daniel; Erwin Erwin
JURNAL KIMIA MULAWARMAN Vol 16 No 2 (2019)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v16i2.693

Abstract

Synthesis methyl ester can be formed from kernel bintaro oil (Carberra Mangas L.) with two stages which is esterification and trans-esterification. The test result of methyl ester of bintaro kernel oil have iod value 92,82 g iod/100 gr oil, acid value 1,67 mg KOH/g oil with acid concentration 12,470% and saponification value 185.225 mg KOH/gr oil. From GC-MS analysis fatty acid dominant composition from methyl ester is methyl oleat with walue 45.86%. From HLB analysis show value 0,539. Result of analysis of FT-IR show methyl ester from bintaro kernel oil have typical absorbtion peak on wave number 17443.65 (C=O Ester).
Potensi Antijamur Ekstrak Metanol Daun Mangrove Rhizopora Mucronata Terhadap Jamur Candida Albicans Dan Aspergillus Niger Usman Usman; Vega Julia Putri Adi
JURNAL KIMIA MULAWARMAN Vol 15 No 1 (2017)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v15i1.583

Abstract

Candida Albicans and Aspergillus Niger are some of the infectious fungi. Empirically bark, flower, root and mangrove leaves Rhizophora mucronata can be a hepatitis drug. This study aims to determine the antifungal potential of methanol extract of Rhizophora mucronata leaves to Candida Albicans and Aspergillus Niger fungus. Chemical test results that have been done previously are alkaloids, Flavanoid , triterpenoids, saponins, tannins and hydroquinone phenols. The antifungal test was performed by agar diffusion method on Potatos Dextrose Agar (PDA) medium and paper disc.Paper disc soaked in methanolic extract of Rhizophora mucronatapada leaf concentration 1000 ppm, 800 ppm, 600 ppm, 400 ppm and 200 ppm. The positive control solution used ketokenazole drug and negative control using aquades with incubation period of 3 x 24 hours. The results did not prove that Rhizophora mucronata leaf methanol extract was effective to inhibit antifungal activity against Candida Albicans and Aspergillus Niger fungi.
PEMBUATAN LEMAK KAKAO RENDAH KALORI DENGAN MINYAK KELAPA (COCONUT OIL)) MELALUI REAKSI INTERESTERIFIKASI Lelya Hilda
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Cacao fat has long chain fatty acids was high mainly palmitic and stearic can be improved their character by adding of palm oil to obtain cocoa fat was low calories. The addition of coconut oil can be done only up to 20%, which is the ratio (90:10) and (80:20) cocoa fat and coconut oil with solid fat content of 5:53 and 4:58 with a melting point 33.6 ° C and 32.8oC (32oC-35oC melting point cacao fat). The process was be done by interesterification reaction produces cocoa fat that free of trans fatty acids .Keywords: long chain fatty acaid, low calory, solid fat content, melting point
MODIFIKASI KOPOLIMER KARET ALAM SIKLIS GRAFTING ASAM OLEAT MENGGUNAKAN INISIATOR BENZOIL PEROKSIDA DAN BAHAN PENGISI BENTONIT-CETIL TRIMETIL AMONIUM BROMIDA Ahmad Hafizullah Ritonga; Barita Aritonang; Liver Iman Putra Zai
JURNAL KIMIA MULAWARMAN Vol 16 No 1 (2018)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v16i1.726

Abstract

Research on the modification of Cyclic Natural Rubber (CNR) grafting Oleic Acid (OA) copolymer using initiator of Benzoyl Peroxide (BPO) and the filler of bentonite-Cetil Trimethyl Ammonium Bromide (CTAB) has been carried out, which aims to determine the method of modifying Cyclic Natural Rubber (CNR) and Oleic Acid (OA) so it can produce CNR-g-OA copolymer through grafting method with BPO initiator mixed together with bentonite-CTAB. This research was conducted in three stages. The first stage is the process of dissolving CNR using xylene. The second stage is the process of mixing CNR solution and OA with the composition (70:30) phr, followed by the addition of BPO initiator and bentonite-CTAB filler. The third stage is characterization using FTIR and Scanning Electron Microscopy (SEM). The results of the analysis using FT-IR showed an absorption at 1708,23 cm-1 which indicated the presence of C=O bonds from oleic acid which had been grafted on CNR, and increased intensity after addition of bentonite-CTAB at 1568,96 cm-1; 1446,13 cm-1; 1255,66 cm-1; and 866,94 cm-1. Characterization results using SEM showed that the mixing of Bentonite-CTAB in KAS-g-OA was evenly distributed and quite homogeneous.

Page 9 of 23 | Total Record : 224

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