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JURNAL KIMIA MULAWARMAN
Published by Universitas Mulawarman
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Core Subject : Science,
Journal of Chemistry Mulawarman (JKM) is a national journal in the field of chemistry that currently has self-evaluation and is in the order of SINTA 3. This journal is published twice a year by the Department of Chemistry Faculty of Mathematics and Natural Sciences Mulawarman University. Until 2017, the Editorial Team has issued JKM up to volume 15 Issue 1. For the issuance of JKM Volume 15, Issue 2 (May 2018), we have improved journal quality through the provision of a nationally and internationally-indexed online system.
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Articles 123 Documents
Isolation Of Antioxidant Compounds Of N-Hexane Extract Of Nutmeg (Myristica Fragrans Houtt) Leaves Ginting, Binawati; Hadijah, Siti; Helwati, Hira
JURNAL KIMIA MULAWARMAN Vol 15 No 1 (2017)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v15i1.584

Abstract

The isolation of antioxidant active compounds from n-hexane extract of nutmeg leaves (Myristica fragrans Houtt) with dipphenylpicrylhydrazyl (DPPH) has been carried out. n-Hexane extract of nutmeg leaves (0.35%) was obtained by partitioning of methanol extract (535.7 g) using n-hexane solvent. Isolation of active compound of n-hexane extract with gravitational column chromatography gradient elution of n-hexane : ethyl acetate with ratio (9 : 1) ? (7 : 3) obtained 7 mixed fraction of MFHD1 - MFHD 7. MFHD 2 fraction further isolated obtained MFHD 2.1. The nutmeg n-hexane extracts and their fractions showed strong antioxidant activity with IC50 values ??<100 ppm except MFHD 6 fraction showed for IC50 values of 114.95 ppm. The most potent antioxidant activity in MFHD 4 fraction with IC50 value of 0.729 ppm (compared with vitamin C value of IC50 7,875 ppm as positive control). The GC-MS analysis of the MFHA 2.1 fraction shows the presence of sitostenone and eucalyptol compounds, both of which have been reported to have been isolated from several different plants and have antioxidant activity.
Pengaruh Tembaga(II) dan Kadmium(II) Terhadap Persen Ekstraksi Merkuri(II) Menggunakan Emulsi Membran Cair Tipe W/O Bersurfaktan Ganda dengan Benzoil Aseton Sebagai Pembawa Kation Hamzah, Baharuddin; Mucthar, HUsnia; Rahmawati, Sitti
JURNAL KIMIA MULAWARMAN Vol 15 No 1 (2017)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v15i1.493

Abstract

Telah dilakukan penelitian tentang pengaruh tembaga(II) dan kadmium(II) terhadap persen ekstraksi merkuri(II) menggunakan emulsi membran cair tipe W/O bersurfaktan ganda dengan benzoil aseton sebagai pembawa kation. Kondisi optimum yang digunakan pada penelitian ini adalah sebagai berikut. Emulsi dibuat dengan menggunakan campuran surfaktan span-80 & span-20 = 2%, laju emulsifikasi = 2000 rpm selama 10 menit, rasio volume fasa membran/fasa internal = 1, konsentrasi HNO3 dalam fasa internal = 2M. Ekstraksi dilakukan terhadap larutan 30 ppm merkuri sebagai fasa eksternal dengan pH = 2  dan  laju ekstraksi 300 rpm selama 10 menit serta rasio volume fasa eksternal/emulsi = 7, Hasil penelitian menunjukkan bahwa ekstraksi merkuri(II) dengan emulsi membran cair, relatif selektif terhadap tembaga(II) dan kadmium(II). Hasil penelitian juga menunjukkan bahwa keberadaan tembaga(II) dan kadmium(II) hingga 30 ppm, menurunkan persen ekstraksi merkuri(II) berturut-turut 12,12% dan 11,74%.
Isolasi Dan Karakterisasi Lipase Dari Rebung Bambu Betung Dendrocalamusasper Prasetyo, Agung; Astuti, Winni; Saleh, Chairul
JURNAL KIMIA MULAWARMAN Vol 15 No 1 (2017)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v15i1.585

Abstract

This research was conducted to get the extract of rough lipase produced by bamboo shoots (Dendrocalamus asper). Lipase isolation from bamboo shoots was done by blending bamboo shoots to produce the crude extract of the enzyme. Lipase crude extracts that occurred at centrifugation at 12000 rpm for 30 minutes at 4?C. The crude extracts obtained were then tested using quantitative pH 7, temperature 30?C and substrate 1% (v/v). Based on research there is activity of crude extract of lipase equal to 2,24 U/ml.
Potensi Antijamur Ekstrak Metanol Daun Mangrove Rhizopora Mucronata Terhadap Jamur Candida Albicans Dan Aspergillus Niger Usman, Usman; Adi, Vega Julia Putri
JURNAL KIMIA MULAWARMAN Vol 15 No 1 (2017)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | 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.
ANALISIS PERUBAHAN KADAR LOGAM TEMBAGA (Cu) PADA PENAMBAHAN ION PERAK (Ag) DENGAN METODE ELEKTROKOAGULASI Pratiwi, Agustin; Yusuf, Bohari; Gunawan, Rahmat
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 analysis of changes in levels of copper (Cu) on the addition of silver ions (Ag) with electrocoagulation method has been researched by using Atomic Absorption Spectrophotometer (AAS) as an instrument for the determination of levels. The addition of ionic silver (Ag) in a solution of copper (Cu) using varying concentrations of silver (Ag) 4, 6, 8, 10 and 12 ppm. The results showed that the effect of the addition of ionic silver (Ag) 4,6, 8, 10 and 12 resulted in changes in the levels of copper (Cu) are deposited successively in the ppm concentration is 9.375; 9.324; 9.272; 9.168; 9.142 and 9.116. Metalcontentof silver(Ag) in a medium containing copper (Cu) with a variety of metallic silver( Ag) differentat 4, 6, 8, 10 and 12ppm after the electrocoagulation metal contentof silver(Ag) depositedin the amount3.99; 5.99; 7.96; 9.91 and 11.88ppm.
Analisis Kadar Ion Pb2+ Pada Kangkung Darat (Ipomea Reptans Poir) Yang Diberi Air Lindi Dari Tpa Sampah Bukit Pinang Samarinda Hamsina, Hamsina; Yusuf, Bohari; Erwin, Erwin
JURNAL KIMIA MULAWARMAN Vol 15 No 1 (2017)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v15i1.545

Abstract

The Research to determine the levels of Pb ion on swamp cabbage (Ipomoea reptans Poir) where each of media cropping given variation of leachate volume from TPA Bukit Pinang Samarinda for every 10 kg of soil has been carried out. Swamp cabbage was analyzed in the roots, stems and leaves at the age of 2 weeks to 4 weeks. The levels of Pb2+ ion was determined by dry destruction method, then measured by atomic absorption spectrophotometry. Pb2+ ion was accumulated on the ground kale plants. The highest levels of Pb2+ ion was contained in the roots of ground kale plants on media cropping which added 1.5 L of leachate at the age of 3 weeks of 2.0642 mg / kg wet weight. The lowest level of Pb2+ ion was contained in the leaves of control plants at the age of 2 weeks that was 0.0177 mg / kg wet weight.
Rice Husk Silica-Coated Magnetic Particles As A Low Cost Support Material For Crude Pseudomonas Aeruginosa Lipase Immobilization Hindryawati, Noor
JURNAL KIMIA MULAWARMAN Vol 14 No 1 (2016)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

In this research, lipase produced from the bacteria Pseudomonas aeruginosa was immobilized on rice husk silica-coated Fe3O4 nanoparticles. The process included the following steps: preparation of magnetic ferrosoferric oxide nanoparticles (NP), coating NP with silica from rice husk ash, activation with glutaraldehyde and covalent immobilization of lipase on the support. The synthesis of the nanoparticle was followed by characterization through FT-IR, XRD, and FE-SEM. The hydrolysis kinetics (using 4-Nitrophenyl palmitate as a substrate) of the immobilized lipase followed Michaelis-Menten model with a Vmax and a Km value of 4.0 mM.s-1 and 0.63 mM, respectively. The immobilized lipase showed better tolerance to extreme temperature and pH compared to free lipase. About 60% of enzyme remained immobilized after ten cycles of reuse and 68.13% of it were stable until 49 days. Thus the silica-coated Fe3O4 nanoparticles appeared to be a potential support material for lipase immobilization applications.
UJI FITOKIMIA DAN AKTIVITAS ANTIBAKTERI EKSTRAK KASAR ETANOL, FRAKSI n-HEKSANA, ETIL ASETAT DAN METANOL DARI BUAH LABU AIR (Lagenari siceraria (Molina) Standl) Marliana, Eva; salaeh, Chairul
JURNAL KIMIA MULAWARMAN Vol 8 No 2 (2011)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Phytochemical test and Antibacterial Activity test in each fraction of the gourds fruit (Lagenari siceraria (Molina) Standl) that came from Teluk Dalam, Tenggarong Seberang have been done. The sample of leaves was extracted with ethanol and then concentrated by using rotary evaporator. The ethanol crude extract was fractioned with n-hexane, Ethyl Acetate and Methanol. Based on the phytochemical test on secondary metabolits of the gourds fruit (Lagenari siceraria (Molina) Standl), it showed that ethanol crude extract contained flavonoid, saponin, steroid, and phenol. n-hexane fraction contained a steroid, ethyl acetate fraction contained phenol. And methanol-water fraction contained saponin and phenol. Based on the Antibacterial Activity test using the paper disc diffusion method (diameter 6 mm), the  results of this test showed that the most active fraction is n-Heksana with : of the Bacillus cereus bacteria at the concentration 1, 2, 4, 6, 8 and 10% (b/v) with inhibition diameter 9.57, 9.88, 10.17, 12.18, 13 and 14.3 mm respectively so minimum inhibitory concentration got 0-1%. The active response toward Salmonella typhi bacteria at the concentration 1, 2, 4, 6, 8 and 10% (b/v) with inhibition diameter 7.50, 7.60, 8.20, 8.38, 8.87, and 9.8 mm so minimum inhibitory concentration got 0-1%. The chloramphenicol antibiotics concentration 0.00386 M as a standard to inhibit the growth of Bacillus cereus and Salmonella typhi bacteria with the inhibition diameter 12.58 mm and 15.06 mm respectively.
PENURUNAN GARAM KLORIDA AIR LAUT DENGAN MEMANFAATKAN MODIFIKASI PATI DARI LIMBAH BONGGOL PISANG AMBON (Musa paradisiaca var sapientum) Rabbani, Aulia Husna; -, Alimuddin; Saleh, Chairul
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 of desalination the sea water by utilization of the strach bump a “Pisang Ambon (Musa paradisiaca var sapientum)” modification has been done. Modification of starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” had be a ability better than starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” in the levels of chloride. The variation upon which to do to absorb chloride of sea water which are starch, starch been activated NaOH and starch acetate bump of a “Pisang Ambon (Musa paradisiaca var sapientum)”. Where The characteristic of the third ingredients were done by analysis FT-IR that showed the spectrum in the wavenumber of each of which are read the force –OH,C-H streaching, C-H bending, CO ester in the spectrum of starch and starch been activated with NaOH and then are read the ester C=O in the wave number of 1751,36/cm and C-O ester and forth on the wave number of 1234,44/cm to the full spectrum of starch acetate. The rendemen a modification of the starch was also shown the modified starch in the bump a “Pisang Ambon (Musa paradisiaca var sapientum)” then more starch obtained. And which after passed a sample of starch bumb “Pisang Ambon (Musa paradisiaca var sapientum)” wet sea water left in levels chloride 20.160,77 mg/L, in the starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” dry sea water left in levels of chloride 19.783,23 mg/L, in the starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” have been activated with NaOH wet sea water left in the levels of chloride 19.405,68 mg/L, in the starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” have been activated with NaOH dry sea water left in levels of chloride 19.028,14 mg/L and in the starch acetat bump “Pisang Ambon (Musa paradisiaca var sapientum)” sea water left in levels of chloride 18.461,83 mg/L.Keywords: the water of the sea, salt chloride, spectrum FTIR, starch and modification of starch bump a Pisang Ambon (Musa paradisiaca var sapientum)
AKTIVITAS ANTIHIPERGLIKEMIK DARI EKSTRAK ETANOL DAN n-HEKSANA DAUN KEMBANG BULAN [Tithonia diversifolia A.Gray] PADA TIKUS PUTIH JANTAN Darmawi, Ary Rizki; Saleh, Chairul; Kartika, Rudi
JURNAL KIMIA MULAWARMAN Vol 12 No 2 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Original Source | Check in Google Scholar | Full PDF (303.725 KB)

Abstract

Phytochemical test and antihyperglicemic activity from ethanol extract dan n-hexane extract from kembang bulan (Tithonia diversifolia A.Gray) leaf has been carried out. Based on the test result of phytochemistry of secondary metabolites compounds from kembang bulan (Tithonia diversifolia A.Gray) leaf showed that ethanol extract fraction containing flavonoid, fenolik, alkaloid and saponin. Whereas at n-hexane extract fraction containing alkaloid, saponin and steroid. Antihyperglicemic activity test using the method of glucose tolerance where a white male rats got induced by sucrose. Measurement of blood sugar levels using glucometer and glucose test strip. From this test shows that the most active fractions to reduce blood sugar levels was ethanol extract with a dose of 77 mg/kg BB with percentage of blood sugar levels reduction in the amount of 54.15 % it was close with reduction percentage from acarbose as positive control in the amount of 55.57 %.

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