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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 10 Documents
 1 
Search results for , issue "Vol 8 No 1 (2010)" : 10 Documents clear
PROFIL KIMIA ARTOCARPUS Erwin -
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Artocarpus, one of the main genus of  Moraceae is known as a rich source of phenolic compounds especially prenylated flavonoids with a variety of structural types. From the literature review we obtained some phenolic compounds such as  calkon, flavane, flavone, Santon, stilben and Adduct Diels-Alder Type. Keywords: Artocarpus, phenolic, flavon
ISOLASI SENYAWA FENOLIK PADA FRAKSI METANOL-AIR DARI UMBI TUMBUHAN SARANG SEMUT (Myrmecodia tuberose Jack) Daniel -
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The Isolation of phenolic compound in methanol-water fraction from Myrmecodia tuberosa Jack that come from Bulungan have been done. The air-dried powdered from corm of ant plant (Myrmecodia tuberosa Jack) (250 gram) were extracted by methanol at room temperature      (27 oC) and fractioned with n-hexane then ethyl acetate. Partition of phenolic compounds in Methanol-Water fraction was chromatographed on silica gel column (35–70 mesh) that eluted with Isocratic method and gave 10 fractions as a result, that fractions were A, B, C, D, E, F, G, H, I dan J fraction. C; E; G and H (alliance fraction) gave the best spot partitioned and the spot was not fluorescence. Purification of alliance fraction gave yellow-brown crystal with retention factor 0.52 that eluted with methanol : ethyl acetat (8:2) whereas the retention factor in methanol 0.82 and ethyl acetate 0,33. Infrared spectrum of alliance fraction shown absorption at value : 3351.83; 2945.33; 2833.04; 1741.00; 1451.60; 1215.67; 885.74 and 776.74 cm-1 with melting point 224 - 228oC. UV and Visible spectrum of alliance fraction shown wavelength at value 263 and 334 nm. Phenolic compounds in Methanol-Water fraction from the corm of ant plant (Myrmecodia tuberosa Jack) was predictioned as phenolic compound of flavonoid group.Keywords : Ant Plant (Myrmecodia tuberosa Jack), Phenolic, Isocratic , Flavonoid, Isolation,
PENGARUH PENAMBAHAN CaCO3 DAN WAKTU PENYIMPANAN TERHADAP KADAR VITAMIN C PADA PROSES PENGHAMBATAN PEMATANGAN BUAH TOMAT (Lycopersicum esculentum Mill) Rudi Kartika
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The aim of this research is to know the influence of CaCO3 addition and storage duration to vitamine C concentrate in ripe obstruction process of tomato (Lycopersicum esculentum Mill). Calcium carbonate(CaCO3) which is added 0; 0.2; 0.4; 0.6 and 0.8 percent of weight and storage duration were 0; 2; 4; 6; 8; 10 and 12 days. Vitamine C was determined by using iodometric titration method. The data obtained were then analized by ANOVA test and LSD test. The result showed that CaCO3 addition could influence vitamine C concentrate in ripe obstruction process of tomato (Lycopersicum esculentum Mill) on standard 5% and 1% with  Ftest > Ftabel (5% and 1%) or F(7.6667) > F(2.50 and 3.60) and storage duration could influence vitamine C concentrate in ripe obstruction process of tomato (Lycopersicum esculentum Mill) on standard 5% and 1% with Ftest > Ftabel (5% and 1%) or F(1204.2222) > F(2.32 and 3.07). Based on the result LSD test on significant standard 5% (0.0143) and 1% (0.0190), optimum vitamine C concentrate were 0.8589 mg/10 g on 0.2% of calcium carbonate (CaCO3) addition and 10 days of storage duration.Keywords : ANOVA, CaCO3, LSD, tomato, vitamine C, storage duration
PENGARUH BERAT DAN WAKTU KONTAK UNTUK ADSORPSI TIMBAL(II) OLEH ADSORBEN DARI KULIT BATANG JAMBU BIJI (Psidium guajava L.) Sri Lestari
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Research about influence of weight and contact times of to adsorb lead(II) by adsorbent from bark of guava has been done. The research was varied by series of adsorbent weight 0.5; 1.0; 1,5; 2.0; 2.5; and 3.0 gram and the contact time 30, 60, 90, 120, 150, and 180 minutes. Concentration of lead(II) in sample is measured by atomic absorption spectrophotometer. The result showed that optimum contact time is 90 minutes. It was also found that higher adsorbent weight will increase the total amount of adsorbed lead(II).Keywords: Adsorption, lead(II), bark, guava
PEMANFAATAN ARANG AKTIF DARI TEMPURUNG Jatropha curcas L. YANG TERMODIFIKASI SEBAGAI ADSORBEN LOGAM TEMBAGA (Cu) Teguh Wirawan
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

A research on the application of activated carbon from Jatropha curcas L shell which is modified as the copper adsorbent has been conducted. The research was varied by series of initial pH 1, 2, 3, 4, and 5 and the contact time 15, 30, 60, 90, and 120 minutes and its effect to copper adsorption by activated and modified carbon from Jatropha curcas L shell. The result showed that the optimum pH for AA-FISIK, AA-EDTA and AA-HNO3 is 3 and for AA-HCl is 5. The optimum contact time is 90 minutes for AA-HCL and AA-EDTA; 60 minutes for AA-HNO3; and 120 minutes for AA-PHYSICAL. It was also found that higher initial concentration will increase the total amount of adsorbed copper.Keywords: adsorption, copper, activated carbon, Jatropha curcas L
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
ISOLASI SENYAWA ALKALOID DARI DAUN SIDAGURI (Sida rhombifolia L.) Sovia Lenny; Tonel Barus; Evi Yoana S
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The secondary metabolite compound was isolated from sidaguri (Sida rhombifolia L.) leaves. The diethylether extract was subjected to a column chromatography with a mixture of chloroform:methanol (7:3) was obtained as amorf  (59 mg). The FT-IR and 1H-NMR spectrum indicated the isolated compound was alkaloid compound.Keywords : Sidaguri (Sida rhombifolia L.), column chromatography, alkaloid
STUDI AB INITIO GRAFIT BATUBARA SEBAGAI MATERI PENYIMPAN HIDROGEN Rahmat Gunawan; Melanie David; Hideaki Kasai; Muhammad A. Martoprawiro; Cynthia L. Radiman; Herman K. Dipojono
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Calculation of density functional theory (DFT) is carried out to investigate the adsorption of six molecules of H2 molecules on a graphite planar layer with a doping of alkali metal (Li, Na, and K). We reported that the DFT-GGA method, the presence of alkali metals on graphite, and H2-(GICs), have changed the interaction and the electronic system. We also reported that the ratio increased electron transfer from K to Na and Li. The calculation of the charge density shows that the increase in energy due to the transfer of electrical charge from GICs to six molecules of H2. This changes the electronic properties of graphite that are important in applications such as hydrogen storage.Keywords: Molecule Hydrogen, Graphite Intercalated Compounds, Density Functional Theory
PENGARUH PENAMBAHAN INISIATOR DIKUMIL PEROKSIDA DAN DIVINILBENZENA SEBAGAI CROSLINK PADA KOMPATIBILITAS RASIO CAMPURAN POLIETILENA DAN KARET ALAM SIR 3L Amir Hamzah Siregar
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The research about  the influence of adding initiator dicumyl peroxide and divinylbenzene as crosslink agent on the compatibility blending rasio polyethylene and natural rubber SIR 3L   has been carried out. Blending is done in two steps, the first step was without the addition of divinylbenzene, polyethylene/natural rubber SIR 3L/dicumyl peroxide (w/w) 50 g : 50 g : 1phr, 2phr, and 3phr. The second step was by the addition of divinylbenzene, polyethylene/natural rubber SIR 3L/divinylbenzene/dicumyl peroxide (w/w) 50 g : 50 g : 1phr :1phr, 2phr : 1phr, 3phr : 1phr, 1phr : 2 phr, 2phr : 2phr, 3phr : 2phr, 1phr : 3phr, 2phr : 3phr, dan 3phr : 3phr. To determine the quality of yielded composites,  the tensile test analysis was done, obtained the increasing concentration without divinylbenzene, maximum at variation of concentration polyethylene/natural rubber SIR 3L/dicumyl peroxide is 2 phr is tensile strength and elasticity was 2.20 kgf/mm2 and 12.29%, and by addition of divinylbenzene  obtained the increasing maximum at variation of concentration polyethylene/natural rubber SIR 3L/divinylbenzene/dicumyl peroxide 3phr : 2phr, the tensile strength and elasticity was 3.31 kgf/mm2 and 28.99%. From the SEM analysis result was obtained that the addition of divinylbenzene could improved the composite’s surface so that  become more flatten and homogeneous. From the functional group analysis FT-IR showed that the mixture of divinylbenzene and polyethylene/natural rubber SIR 3L/dicumyl peroxide were just physical interaction. Keyword: peroxside,  Divinyl benzene, Poly Ethylene, Natural rubber (SIR 3 L) Blending
STUDY SENYAWA KIMIA DALAM FASE EKSTRAK ETIL ASETAT SIMPLISIA Cinnamomum spp. Secara KCKT dan KG-SM Yatri Hapsari; Partomuan Simanjuntak
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Cinnamomum burmanii (Nees n’ Th. Nees) Blume, Cinnamomum culilaban (L.) J.S. Presl dan Cryptocarpa massoy (Oken) Kosterm are a rare plant species that grow in Indonesia. Species with this same of genus (Cinnamomum) is a potential in the field of medicine, but the comparison of the composition and concentration of the chemical content  has not been known so their utilization in medical applications is not optimal. Therefore, the research was conducted in order to analyze of chemical compounds in ethyl acetate extracts phase of three plants by chromatography, They were the HPLC (High Performance Liquid Chromatography), and GC-MS (Gas Chromatography Mass Spectrometry) analysis. The analysis was done of the ethyl acetate extract phase in order to identify of chemical compounds which largely composed of essential oils. Based on the results of HPLC analysis, with  using by the reference standards of eugenol showed that in Cinnamomum burmanii and Cinnamomum culilaban (L.) J.S. Presl identified contain of eugenol essential oils, 0.18% and 3.11% respectively. Based on the result of GC-MS analysis, Cinnamomum burmanii was found two components of chemical compounds main with the largest og percentage,  They were sinamaldehid (90.24%) and coumarin (53.46%) compounds. On the Cinnamomum culilaban (L.) J.S. Presl was found four components of chemical compounds main, They were metileugenol (40.68%), verbanone (14.58%), terpinol (8.74%) and spathulenol (8.12%) compounds. Later in the Cryptocarpa massoy (Oken) Kosterm was found three components of chemical compounds main, They were massoyalakton (73.64%), butanoat acid (12.25%) and pentadekanoat acid (9.76%) compounds.

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