cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
NOOR HUBDRYAWATI
Contact Email
jurnalkimiaunmul@gmail.com
Phone
+6285246646998
Journal Mail Official
jurnalkimiaunmul@gmail.com
Editorial Address
Jl.Barong Tongkok no.04 Kampus Gn.kelua Samarinda Kalimantan Timur
Location
Kota samarinda,
Kalimantan timur
INDONESIA
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
 18   19   20   21   22 
Fermentasi Singkong Karet (Monihot carthagenensis MÜII) menjadi Etanol dengan Pemanfaatan Albumin Dari Ikan Gabus (Channa striata) Sebagai Sumber Nitrogen Bagi Mikroba Saputri Satriyana Widyaningrum; Rudi Kartika; Erwin Erwin
JURNAL KIMIA MULAWARMAN Vol 19 No 2 (2022)
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.v19i2.521

Abstract

Has been cassava rubber fermentation (M. carthagenensisMÜll) as a raw material for making ethanol with the utilization of fishcork albumin (Channastriata) as nitrogen Saccharomyces cerrevisiae with enzymatic hydrolysis result through 2 stages ieliquification using α-amylase and saccharification stage using gluco -amilase. The best reducing sugar content was obtained at 0.1307%. Based on this research, maximum ethanol content was obtained with 0.5% concentration of nutrient at fermentation time for 232 hours, obtained by result of 12,688% at 5.6 mL distillate volume using gas chromatography method.
Analisis Fitokimia Dan Uji Aktivitas Antibakteri Ekstrak Metanol Daun Suji (Pleomle Angusitolia N.E Brown) Lutfiana Devi Kurnia; Ritbey Ruga; Chairul Saleh
JURNAL KIMIA MULAWARMAN Vol 20 No 1 (2022)
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.v20i1.1106

Abstract

Phytochemical and antibacterial activity assay of methanol extract from Suji leaves (Pleomele angustifolia) were carried out. The aims of this study are to determine secondary metabolites and antibacterial activity of the methanol extract against Streptococcus sobrinus KCCM 11898 and Streptococcus mutans ATCC 25175 by using agar well diffusion. The results showed that methanol extract of suji leaves contain phenolic, triterpenoid and steroid constituents. With 2%, the methanol extract displayed antibacterial activity against Streptococcus sobrinus and Streptococcus mutans with diameter inhibition zones of 19.0 and 10.3 mm, respectively.
SINTESIS DAN KARAKTERISASI SILIKA GEL DARI ABU SEKAM PADI DENGAN MENGGUNAKAN NATRIUM HIDROKSIDA (NaOH) Noor Hindryawati; Alimuddin Alimuddin
JURNAL KIMIA MULAWARMAN Vol 7 No 2 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The synthesis and characterization of silica gel from rice hull ash by using NaOH has been done. The synthesis of silica gel from rice hull ash was done by incineration through a heating for 4 hours with the temperature variation at 700oC, 800 oC, and 900 oC. The product (Rice hull ash) washed with H2SO4 and then continued with Na2EDTA. The silica gel can be synthesized from the rice hull ash by adding H2SO4 solution into the Sodium Silicate (Na2SO3) at temperature 500oC for 30 minutes. The silica gel from the synthesis can be characterized using infrared spectroscopy and X-Ray diffraction. The result of this research showed the same pattern with the comparator silica gel (Kiesel gel 60).
UJI AKTIVITAS ENZIM DEHIDROGENASE LAKTAT (DHL) YANG TERENKAPSULASI DALAM SILIKA DARI ABU SEKAM PADI Noor Hindryawati
JURNAL KIMIA MULAWARMAN Vol 8 No 2 (2011)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A research has been conducted in testing the enzymatic activity of the encapsulated Lactate dehydrogenase (LDH) in silica by sol-gel process using sodium silicate from rice hull ash. The encapsulation was carried out by mixing sodium silicate (Na2SiO3) sol solution and phosphate buffer pH 7 containing both LDH enzyme and coenzyme of nicotinamide adenine dinucleotide (NAD+). After 2-6 minute of shaking, the mixture was then transferred into a 96-microwell plate and stored overnight. The encapsulation activity of encapsulation product was quantified by measuring absorption of NADH, as coenzyme hydrogenation product, at 340 nm utilizing an ELISA (Enzyme Linked Immunosorbent Assay) reader. For comparison similar experiment was also carried out for free enzyme. The result of the research shows that the kkat for encapsulated LDH enzyme (ET) is smaller than free enzyme (EB), which means that the encapsulation enzyme will affect the velocity of product reaction. The velocity of the encapsulation enzyme (ET) reaction is lower than free enzyme (EB) as the consequence of weak interaction between the substrate and enzyme or influenced by k1.
CHARACTERIZATION PHYSICAL AND CHEMICAL OF SESAME SEED OIL (Sesamum indicum L.) METHYL ESTER AND COMPOSITION Aji Zaldya NMC; Daniel Daniel; Irfan Ashari Hiyahara; Agustina R Magdaleni
JURNAL KIMIA MULAWARMAN Vol 20 No 2 (2023)
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.v20i2.946

Abstract

The methyl ester of sesame seed oil (Sesame seeds L.) was used to make diethanolamide. This process involvedextraction, transesterification, and amidation. The research revealed that extraction by maceration yielded a sesame seed oil yield of 36.14 percent, an acid number of 1.1531 mg KOH/g, a FFA number of 0.5796 percent, and a saponification number of 51.287 mg KOH/g. In the process of converting sesame seed oil to methyl ester, the acid number was 0.5126 mg KOH/g, the FFA number decreased to 0.2704%, and the saponification number was 50.049 mg KOH/g. According to methyl ester GC-MS analysis, methyl oleate made up 39.13% of the methyl ester of sesame seed oil. The methyl ester FT-IR spectrum exhibits a specific absorption peak at 1743 cm-1 for C=O ester.
SPECTROPHOTOMETRIC ANALYSIS OF CHLORAMPENICOL IN TIGER PRAWNS (PENAEUS MONODON) BASED ON THE DIAZOTATION REACTION Moh. Syaiful Arif; Indra Kurniawan; Bohari Yusuf
JURNAL KIMIA MULAWARMAN Vol 20 No 2 (2023)
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.v20i2.1017

Abstract

Spectrophotometric analysis of chloramphenicol in tiger prawns (Penaeus Monodon) based on the diazotation reaction has been carried out. Sulfanilamide is used as a source of diazo salt to be coupled with chloramphenicol. In this study, several optimizations were carried out such as optimization of temperature, volume of HCl, volume of NaNO2, volume of sulfanilamide and contact time. Diazonium salt coupled with sulfanilamide produces a clear yellow compound with a maximum wavelength of 400.941 nm. The results of the analysis chloramphenicol on tiger shrimp, obtained the coefficient of variation were 4.026 %; 1.951 %; and 4.277 %.. Accuracy ranges from 99.7143% to 100.8730%. The Limit of Detection value is 6.24 mg/mL and the Limit of Quantization value was 20.803 mg/mL. The sensitivity value is 0.0021 mL /mg.
Ekstraksi EKSTRAKSI DAN KARAKTERISASI PEKTIN DARI LIMBAH KULIT JERUK LIMAU (Citrus amblycarpa) Fiqi Estuning Nava Maulida; Alimuddin Alimuddin; Erwin Erwin
JURNAL KIMIA MULAWARMAN Vol 20 No 2 (2023)
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.v20i2.527

Abstract

Research on the extraction and characterization of pectin from lemon lime peel waste (Citrus amblycarpa) has been done. The purpose of this research is to process lime waste into raw material of pecti
PREPARATION OF FE-DOPED ZINC OXYSULFIDE (Fe-Zn(O,S)) WITH SURFACE DEFECT FOR HYDROGEN EVOLUTION REACTION Hardy Shuwanto; Jenni Lie; Hairus Abdullah; Subur P. Pasaribu
JURNAL KIMIA MULAWARMAN Vol 20 No 2 (2023)
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.v20i2.1108

Abstract

In this study, Fe-doped Zn(O,S) has been successfully fabricated by a one-step preparation process using chemical wet method. The Fe-doped Zn(O,S) photocatalysts were studied by varying the content of Fe dopant. The characterizations of Fe-doped Zn(O,S) were carried out by SEM and XRD analyses to determine the morphology and phase of samples. Furthermore, the optical and electrochemical properties were characterized through EIS, TPC, DRS and PL analyses. Briefly, Zn(O,S) with 5% Fe amount exhibited the most optimum condition as compared to other Fe amounts in which it showed better charge separation with the hydrogen evolution amount of 29000 mikromol/g in 10% EtOH solution. Lastly, the proposed mechanism is initially by the trapping of water molecules in the oxygen vacancy (defect) in Fe-Zn(O,S) sample followed by the reduction to generate hydrogen (H2) gas via the intermediate of proton (H+).
Efek Larvasida Ekstrak Tegates erecta Fraksi Heksan dan Aseton terhadap Larva Nyamuk Aedes aegypti Instar 3 dan 4 November Rianto Aminu; Hartati Soetjipto; A Ign Kristijanto
JURNAL KIMIA MULAWARMAN Vol 20 No 2 (2023)
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.v20i2.772

Abstract

Resistance to temephos as a larvicide of A. aegyptimosquitoes has occurred in Indonesia. Therefore, it is necessary to look for other active compounds that can act as larvicides, but also environmentally friendly. This study used leaf and roots extract of T. erectahexane and acetone fraction as larvicide. The process begins with drying followed by extracting samples (leaves and roots of T. erecta) each with hexane and acetone solvents. Test solutions were made with a concentration of 0, 0.0075, 0.015, 0.03, and 0.1% (w/v) of the extract produced. Larvicide test was carried out referring to WHOPES by observing the mortality of instar larvae 3 and 4 in each extract. The results obtained showed the mortality percentage of larvae increased with increasing concentration and exposure time in both types of larvae. The lowest LC 50 was obtained from the root extract of hexane fraction (37 ppm) for 3rd instar larvae and acetone fraction (61 ppm) for instar 4 larvae. Keywords: Larvae, A. aegypti, T. erecta. Fraction
IDENTIFIKASI SENYAWA METABOLIT SEKUNDER DAN UJI AKTIVITAS ANTIOKSIDAN PADA LIMBAH KULIT BUAH Prilla Amnestiya; Arief Yandra Putra; Yelfira Sari
JURNAL KIMIA MULAWARMAN Vol 20 No 2 (2023)
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.v20i2.1129

Abstract

Indonesia adalah negara yang menyimpan kekayaan sumber daya hayati, terutama buah tropika. Tingginya keragaman tanaman buah di Indonesia menghasilkan berbagai manfaat untuk kesehatan, di antara lain sebagai antioksidan. Tidak hanya terdapat dibuah, kulit buah juga mengandung antioksidan untuk kesehatan. Manfaat antioksidan bagi tubuh di antaranya untuk melindungi sel-sel tubuh dari kerusakan yang diakibatkan oleh radikal bebas. Senyawa radikal bebas terdapat dalam lingkungan kehidupan sehari-hari manusia. Polusi udara merupakan salah satu contoh sumber radikal bebas. Sumber radikal bebas lainnya yaitu racun, paparan sinar matahari berlebih, asap rokok, makanan yang digoreng, dan obat-obat tertentu. Tujuan dari literature review ini adalah untuk mengetahui metabolit sekunder dan aktivitas antioksidan yang terdapat pada limbah kulit buah sebagai mengakal radikal bebas. Metode yang digunakan dalam karya tulis ini penelusuran pustaka melalui database Google dan Google Scholar dengan menggunakan keyword. Jurnal yang telah ditemukan dilakukan screening dengan kriteria inklusi dan eksklusi. Berdasarkan hasil dari berbagai penelusuran yang dicantumkan dalam artikel menunjukkan aktivitas antioksidan yang tinggi terdapat pada limbah kulit buag naga yaitu nilai IC50 adalah 2,69 ppm.

Page 20 of 23 | Total Record : 224

 18   19   20   21   22 

Filter by Year

2010 2025


Reset
Filter By Issues
All Issue Vol 22 No 2 (2025) Vol 22 No 1 (2024) Vol 21 No 2 (2024) Vol 21 No 1 (2023) Vol 20 No 2 (2023) Vol 20 No 1 (2022) Vol 19 No 2 (2022) Vol 19 No 1 (2021) Vol 18 No 2 (2021) Vol 18 No 1 (2020) Vol 17 No 2 (2020) Vol 17 No 1 (2019) Vol 16 No 2 (2019) Vol 16 No 1 (2018) Vol 15 No 2 (2018) Vol 15 No 1 (2017) Vol 14 No 2 (2017) Vol 14 No 1 (2016) Vol 13 No 2 (2016) Vol 13 No 1 (2015) Vol 12 No 2 (2015) Vol 12 No 1 (2014) Vol 11 No 2 (2014) Vol 10 No 2 (2013) Vol 9 No 2 (2012) Vol 8 No 2 (2011) Vol 8 No 1 (2010) Vol 7 No 2 (2010) More Issue