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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 5 Documents
 1 
Search results for , issue "Vol 22 No 1 (2024)" : 5 Documents clear
MINYAK ATSIRI DAUN SIRIH HIJAU (PIPER BETLE L.) DAN DAUN SIRIH MERAH (PIPER CROCATUM RULZ AND PAV) : TINJAUAN KOMPREHENSIF TENTANG KOMPONEN, STRUKTUR KOMPONEN, HIBRIDISASI, ADISI, AKTIVITAS BIOLOGIS DAN MANFAATNYA Nenohai, Jacky Anggara; Rosyida, Ima; Putri, Isma Yanti Vitarisma Sukirno; Agustina, Nur Indah; Marfu'ah, Siti
JURNAL KIMIA MULAWARMAN Vol 22 No 1 (2024)
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.v22i1.1262

Abstract

Essential oil is an aroma-giving liquid that comes from plant parts such as roots, stem bark, fruit, leaves, seeds, flowers or other parts taken through distillation methods and extraction methods using organic solvents or pressed and enzymatically. Essential oils in each plant have different components and characteristics. One of the plants that can be utilized and has essential oil content is green betel leaves (Piper betle L.) and red betel leaves (Piper crocatum Ruiz and Pav). Several studies have been conducted to identify the content of betel leaves. The largest content present in green betel leaves is limonene, while the largest content of red betel leaves is sabinena which has a special structure. These red and green betel leaves, have many characteristics, and benefits. The method used in this writing uses a descriptive literature review, with the aim of this study is to compile a comprehensive literature analysis of the components, structure, hybridization, isomerization, addition reactions and biological activity of betel leaves covering some information based on the results of literature studies.
Potential of Cow Bone as a Basic Material for Hydroxyapatite-High Density Polyethylene Composites (HAp-HDPE) Ramadani, Kurnia; Rismawati, Rismawati; Ismail, Ismail; Andriani, Titik
JURNAL KIMIA MULAWARMAN Vol 22 No 1 (2024)
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.v22i1.1363

Abstract

Cow bone has the potential to be used as a basic ingredient in the synthesis of hydroyapatite because it contains calcium. The addition of High Density Polyethylene (HDPE) to hydroyapatite aims to produce biocomposites that have better properties compared to the previous properties. The purpose of this study is to determine the characteristics of biocomposites with the HDPE:HAp in the ratio of 1: 2, 2: 1 and 3: 2 (%w / w). The method used is the sol-gel method and characterized by FTIR to see the bonding of functional groups and electron microscope to see the morphology of biocomposites. The biocomposites that have the best mechanical properties in this study are biocomposites with a ratio (HDPE: HAp) of 3: 2 with compressive and tensile strength values of 0.66 and 0.1290 N / mm2, density and water absorption values of 0.505 g / cm3 and 6,828% respectively and heat resistance with a temperature of 110 ° C experiencing a mass decrease of 0,675 g.
ANALISIS KADAR NITROGEN (N) TOTAL DAN BESI (Fe) PADA PENAMBAHAN BIOAKTIVATOR EM4 TERHADAP KOMPOS (SAMPAH KACANG PANJANG-KULIT KACANG KEDELAI) Cahyani, Amelya Putri; Sitorus, Saibun; Pratiwi, Djihan Ryn
JURNAL KIMIA MULAWARMAN Vol 22 No 1 (2024)
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.v22i1.1111

Abstract

Pengomposan merupakan proses penguraian bahan organik sampah dibawah kondisi-kondisi terkontrol oleh adanya aktivitas mikroorganisme pengurai. Proses pengomposan dilakukan dengan penambahan Effective microorgarnism 4 (EM4). Tahapan penelitian meliputi uji pengaruh waktu pengomposan terhadap suhu dan pH; penentuan variasi optimum bioaktivator EM4 terhadap kadar N-Total dan Fe serta waktu optimum pengomposan berdasarkan kondisi suhu, pH dan warna. Variasi optimum EM4 berdasarkan kadar N-Total pada variasi tanpa penambahan EM4 sebesar 0,4731% dan berdasarkan kadar Fe pada variasi EM4 20 mL sebesar 0,805%. Waktu optimum pengomposan berada pada hari ke-16 dengan pH 7,19-7,50; suhu sebesar 27-28,3°C dan memiliki warna hitam.
VERIFIKASI METODE PENENTUAN SULFUR DIOKSIDA (SO2) PADA SAMPEL UDARA AMBIEN DENGAN METODE PARAROSANILIN MENGGUNAKAN SPEKTROFOTOMETER UV-VISIBELE Anwar, Adliah; Pasaribu, Subur P.; Panggabean, Aman Sentosa
JURNAL KIMIA MULAWARMAN Vol 22 No 1 (2024)
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.v22i1.1119

Abstract

The research about verification method on determination of sulfur dioxide (SO2) on ambient air samples with the pararosaniline method using UV-Vis Spectrophotometer has been done. To obtain a valid measuring result, some important parameters of measurement on sulfur dioxide (SO2) in ambient air samples based on SNI 7119-7:2017. The results showed that the linearity of the measurement was very good as indicated by the correlation coefficient value was 0.9998. The limit of detection and limit of quantization was 2.7766 g/Nm3 and 7.4111 g/Nm3 respectively. The value of precision was good shown by %RSD < 2/3 CV Horwitz, and the accuracy of this method was good shown by a recovery percentage of 101.12%. Based on the results of this research, the pararosanilin method can be used to analyze sulfur dioxide (SO2) in ambient air samples with good results.
The Effect of Soaking Time of Melinjo (Gnetum Gnemon L.) Peel Powder on Peroxide Numbers in Bulk Cooking Oil Fardani, Roushandy Asri; Purwita, Ni Wayan Mustika
JURNAL KIMIA MULAWARMAN Vol 22 No 1 (2024)
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.v22i1.1226

Abstract

Bulk oil is cooking oil that has gone through refining, bleaching, and deodorizing stages. Bulk cooking oil has been distributed in unpackaged form, which means that bulk cooking oil is exposed to oxygen before use. Incorrect storage over a period of time can cause the rupture of triglyceride bonds in the oil which eventually forms glycerol and free fatty acids (Yola, 2018). Bulk cooking oil that reacts with oxygen will cause the peroxide number to increase. High peroxide numbers are very dangerous for health. The content of saponins, tannins and flavonoids found in melinjo peel can be an antioxidant that acts as an antidote to free radicals so that it can slow down oxidation in bulk cooking oil. The purpose of this study was to determine the effectiveness of melinjo peel powder as an antioxidant with variations in soaking time on peroxide numbers in bulk cooking oil. This type of research is experimental with the number of repetitions of samples 16 From the results of the examination, the average peroxide number in bulk cooking oil that has been soaked is 0 day 22.7949 mEq, 4 days 19.5965 mEq and 8 days 9.5984 mEq. Statistical analysis using Kruskal-Wallis test obtained Sig value. 0.003 <0.05 indicates the effect of soaking time of melinjo peel powder on peroxide number in bulk cooking oil.

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