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INDONESIA
PROSIDING SEMINAR KIMIA
Published by Universitas Mulawarman
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
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Articles 502 Documents
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STUDI LITERATUR SINTESIS MATERIAL METAL-ORGANIC FRAMEWORKS-5 (MOF-5) MENGGUNAKAN METODE SOLVOTERMAL DAN APLIKASINYA Mid, Arsy Aprilia; Syaima, Husna; Hindryawati, Noor
PROSIDING SEMINAR KIMIA Vol 2 No 2 (2024): Prosiding SNKT III 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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This review article endeavours to comprehensively gather, compare, and scrutinize recent studies pertaining to the solvothermal synthesis of MOF-5 and its diverse applications. MOF-5 with the molecular formula Zn4O(BDC)3 which can be synthesized from a metal salt of zinc (Zn) with its organic ligands 1,4-benzene dicarboxylic acid (BDC) or terephthalic acid. In the last recent years, research on MOF-5 has continued to evolve and a variety of different synthesis methods have been tested. The synthesis process generally involves the use of polar organic solvents, such as N'N-diethylformamide (DEF) or N'N-dimethylformamide (DMF) at high temperatures and pressures. The solvothermal method is the most frequently used technique and allows good control over crystal size, morphology, and surface area. Factors such as solvent, temperature, reaction time, and metal/ligand ratio affect the properties of the resulting MOF-5 crystal. MOF- 5 is widely applied as a drug carrier material in drug delivery systems. MOF-5 has a high surface area that supports drug loading efficiency and significant hydrogen storage capacity. In addition, MOF-5's ability to release guest molecules in a controlled manner makes it an attractive choice for continuous applications. MOF-5 is also used in a variety of other applications including liquid and gas separation, catalysis, and adsorption. Research on modifying the structure of MOF-5 continues to evolve to meet the needs of increasingly diverse applications. Keywords : Synthesis, Terephtalic Acid, MOF-5, Solvothermal
A KINETIC STUDY OF MERANTI SAWDUST (SHOREA SPP) PYROLYSIS USING THERMOGRAVIMETRIC ANALYSIS Fitria, Fitria; Subagyono, RR Dirgarini Julia Nurlianti; Gunawan, Rahmat
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A kinetic study of pyrolysis of meranti wood using the Kissinger-Akahira-Sunose (KAS), Ozawa-Flynn-Wall (OFW), and Friedman methods using thermogravimetric analysis has been carried out. This study aims to study the synergistic effect of meranti wood and determine the activation energy value. Pyrolysis was carried out at four heating rates, namely 10, 15, 20, and 25°C/minute under N2 gas. The temperature range in the active pyrolysis of meranti wood is 128,42-521°C. The average activation energy values of pyrolysis of meranti wood using the KAS, OFW, and Friedman methods were 170,84 ± 30,07 kJ/mol, 180,36 ± 29,42 kJ/mol, respectively 174, ± 54,77 kJ/mol. Keywords: meranti wood, kinetics studies, pyrolysis, thermogravimetric analysis
AMPLIFICATION OF pncA GENES FROM WATER BACTERIAL POST MINING IN SAMARINDA Suryadi, Ahmad; Astuti, Winni; Kartika, Rudi
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Amplification of pncA genes from water bacterial post mining in Samarinda has been done. The aim of this research is to isolate chromosomal DNA and amplificated the pncA gene from water bacterial post mining in Samarinda. The research methode consist of chromosomal DNA isolation and amplification of pncA gene with polymerase chain reaction (PCR) technique. The result showed the size of chromosomal DNA is ± 10 kb. By using primer pncA gene, the result of amplification of the pncA gene showed that there were two sizes of amplicon, namely 0.7 kb and 0.2 kb. The conclusion that can be drawn was there is two sizes of amplicon pncA gene. Keywords: chromosomal DNA isolation, amplification of pncA gen, PCR
TEST OF AMYLASE INHIBITION ACTIVITY OF METHANOL EXTRACT SINGKIL LEAF (Premna cordifolia Roxb.) Anggriani, Yusnia Wati; Astuti, Winni; Marliana, Eva
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Singkil (Premna cordifolia Roxb.) is a plant that is widely found un Kalimantan. The people of Kalimantan are often used singkil leaf by as traditional medicine are believed to have medicinal properties as a cure for intestinal worms, colds, and antidiabetic. In this research, it used phytochemical screening and inhibition activity amylase test on singkil’s methanol extract. The objective of this study was to determine in-vitro enzyme amilase inhibition activity against sampel by DNS method. The result of this research was phytochemical screening in singkil’s methanol extract contains alkaloids, flavonoids, saponins and phenolics. Singkil leaf methanol extract at a concentration of 10 µg/mL can inhibit the activity of the amylase enzyme with an inhibition value of 60,93 %. Acarbose used as a positive control in this study showed activity against the amylase of 44,79 %. Amylase inhibition activity of methanol extract was higher than acarbose, the singkil leaf methanol extract has the potential as an antidiabetic drug. Keywords: Premna cordifolia Roxb., Amylase inhibition, Secondary Metabolites.
OPTIMATION TIME PRODUCTION SECONDARY METABOLITES ENDOFIT BACTERIES EXTRACT OF PUCUK MERAH LEAVES (Syzygium myrtifolium Walp.) Rahimah, Priliza; Astuti, Winni; Marliana, Eva
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Pucuk Merah (Syzygium myrtifolium Walp.) is an ornamental plant that has benefits as an antioxidant, antibacterial, antiplatelet, antiulcerative, antimalarial, antiviral, antihyperglycemic and anti-inflammatory. This research aims to determine the optimum time for the production of secondary metabolites of pucuk merah endophytic bacteria for amylase and protease inhibition. Production of secondary metabolites was carried out at various times of 24 hours, 48 ​​hours and 72 hours. The method for the amylase inhibition test used the DNS method and the protease inhibition test used the Bradford method. The results showed that the optimum time for the production of secondary metabolites was 48 hours. Keywords: Syzygium myrtifolium Walp., Endophyte Bacteria, Production Time.
UJI FITOKIMIA DAN UJI TOKSISITAS EKSTRAK ETANOL KULIT BATANG KRATOM (Mitragyna speciosa Korth.) DENGAN METODE BRINE SHRIMP LETHALITY TEST (BSLT) Rohadi, Imam; Erwin, Erwin; Aziz, Abdul
PROSIDING SEMINAR KIMIA Vol 2 No 2 (2024): Prosiding SNKT III 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Kalimantan people often use plants as traditional medicine, one of which is the Kratom plant (Mitragyna speciosa Korth.). Kratom in low doses can have a stimulant effect and cause narcotic effects at high doses, so this plant is interesting to study for its chemical compound content. The aim of this research is to determine the content of secondary metabolite compounds and the level of toxicity of the kratom stem bark ethanol extract against Artemia salina L. larvae. The methods used in this research are extraction, phytochemical tests and the Brine Shrimp Lethality Test (BSLT). The results showed that the ethanol extract of kratom stem bark contains alkaloids, triterpenoids, phenolics, flavonoids and quinones. Furthermore, the BSLT test results showed that the ethanol extract of kratom stem bark has a toxicity level of 235.15 ppm in the toxic category (LC50 < 1000 ppm). Based on these results, it can be concluded that the ethanol extract of kratom stem bark has the potential to have bioactivity because it is toxic to Artemia salina L. shrimp larvae. Keywords: Phytochemicals, Kratom, Secondary Metabolites, Toxicity.
COMPARISON BIOCOAGULAN EFFECTIVENESS OF MORINGA SEED (Moringa oleifera) AND SOYBEAN (Glycine max) TO REDUCE IRON (Fe) AND TURBIDITY IN BORED WELL WATER Adnan, Fahrizal; Nugroho, Searphin; Tandi, Mardiana Lestari
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Groundwater is a source of raw water for living things. Groundwater can be obtained from drilling wells. Groundwater from drilled wells can be directly used, but some require processing before it becomes usable raw water. This research conducted water treatment by means of coagulation, flocculation, and precipitation to reduce iron and turbidity in bore well water using coagulants from extracts of moringa seeds and soybeans. Compounds in moringa seeds and soybeans that act as coagulants are proteins. This research was conducted to determine the best coagulant between moringa seeds and soybeans using a concentration of 30 mL/L, as well as determine the optimum coagulant concentration from the selected coagulant extract. The concentration variations used in the selected coagulant extracts were 10 mL, 20 mL/L, 30 mL/L, 40 mL/L, and 50 mL/L. The results showed that the optimal coagulant extract was moringa seeds with a decrease in turbidity to 109.79 NTU (4.5%) from 115 NTU and iron to 0.36 mg/L (92.73%) from 4.95 mg/L. The optimal concentration of coagulant concentration variations of Moringa seed extract is 10 mL/L with a decrease in turbidity to 69.76 NTU (39.34%) from 115 NTU and iron to 0.034 mg/L (99.31%) from 4.95 mg/L. Keywords: Coagulation, Moringa Seeds, Soybeans, Iron, Turbidty
THE POTENTIAL OF EXTRACT SINGKIL LEAVES (Premna cordifolia Roxb.) AS ANTIBACTERIAL AGENTS AGAINST Propionibacterium acnes Az-zahra, Deannisa Khoiru; Astuti, Winni; Marliana, Eva
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

One of the causes of acne is infection by the bacteria Propionibacterium acnes. Singkil (Premna cordifolia Roxb.) is a kind of herb plant from Kutai Kartanegara which is used as a traditional herb including for acne’s treatment. This study aims to know the content of secondary metabolites compound in singkil’s extract and determine the antibacterial activity against Propionibacterium acnes KCCM 41747 bacteria. In this study, it’s phytochemical screening and antibacterial activity test using the disc diffusion method on methanol extract, n-hexane, ethyl acetate and water-methanol fractions. the result of phytochemical screening revealed that methanol extract of singkil contains alkaloids, flavonoids, steroids, and saponins. The n-hexane fraction contains steroids and the ethyl acetate fraction contains alkaloids, flavonoids, and phenolics while the water-methanol fraction contains alkaloids, flavonoids, and phenolics. The antibacterial activity test extract with a concentration of 10% showed that the diameter of clear zone of the metanol extract, n-hexane fraction, ethyl acetate fraction, and water-methanol fraction were 13 mm, 9 mm, 13,67 mm and 6 mm, respectively. The ethyl acetate fraction had the highest antibacterial activity among the four extracts. A minimum inhibitory concentration value of the ethyl acetate fraction against Propionibacterium acnes KCCM 41747 was 0,625%. The ethyl acetate fraction have the potential as an antibacterial against the bacteria Propionibacterium acnes KCCM 41747. Keywords: Premna cordifolia Roxb., Secondary metabolites, Propionibacterium acnes KCCM 41747
VERIFIKASI METODE MBAS TERHADAP PEMANFAATAN FABA DALAM PENURUNAN KADAR SURFAKTAN ANIONIK LIMBAH CAIR DOMESTIK LAUNDRY DI BALIKPAPAN Paramita, Adhe; Elma, Muthia; Rahma, Aulia; Suryani, Made Yuri
PROSIDING SEMINAR KIMIA Vol 2 No 2 (2024): Prosiding SNKT III 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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The Flay Ash and Bottom ash (FABA) used are derived from the Balikpapan Power Plant. Chemical activation was carried out using a base treatment with NaOH concentrations of 0 and 6 M mixed with FABA at a ratio of 10 mL solution per 1 gram of ash at a temperature of 160°C and then the mixture was dried under neutral conditions at 100°C for 4 hours. The activated FABA was then applied in the treatment of laundry waste. The verification of anionik surfactant parameters in the laundry wastewater samples was conducted based on the MBAS (Methylene Blue Active Substances) method using a UV-Vis spectrophotometer, were in accordance with the SNI 06-6989.51-2005 standard at a wavelength of 652 nm.The results was indicated by the value R2=0.9981 and the value of r=0.9990, equivalent to 99.9%. The limit of detection (LOD) value was determined to be 0.56082 mg/L, while the smallest measurable concentration limit (LOQ) was 1.86941. The precision level measured by %RSD was 0.08965%, which is less than 2/3 of the maximum Horwitz %CV value of 7.82018%. The test data indicates good precision results. The concentration of anionik surfactant also experienced a significant decrease in the case of Flay Ash 6 M. Keywords: bottom ash, flay ash, laundry, surfactant
SYNTHESIS OF SILVER NANOPARTICLES USING CHEMICAL REDUCTOR: MINI REVIEW Az Zahra, Upi Fathimah; Panggabean, Aman Sentosa; Hindryawati, Noor
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Silver nanoparticles are particles whose range ranges from 1-100 nm. Formation of metal nanoparticles can be done by top down (physics) and bottom up (chemistry) methods. Chemical reduction is a very commonly used method because it is relatively simple, easy and effective to produce AgNPs. Synthesis of silver nanoparticles was carried out by forming a colloidal silver solution using the silver nitrate reduction method with a chemical reducing agent. Some chemical reducing agents that can be used are ascorbic acid, citric acid, hydrazine and NaBH4. In addition, a stabilizing agent is needed to prevent agglomeration of the formed nanoparticles. The purpose of this article review is to determine the characteristics of silver nanoparticles synthesized using chemical reducing agents based on UV-Vis, PSA, TEM and SEM spectrophotometer data. The method used is the method of literature review. The results show that the synthesis of silver nanoparticles by reducing silver nitrate with sodium borohydride and poly acrylic acid (PAA) stabilizer produces an average size of 71.8 nm silver particles, the PVP stabilizer produces an average size of 96.0 nm silver particles, synthesis of silver nanoparticles using reducing agents ethylene glycol and polyvinylpyrrolidone (PVP) produces an average size of silver particles of less than 10 nm, synthesis of silver nanoparticles using reducing agents hydrazine hydrate and polyvinyl alcohol produces an average size of silver particles of 10-60 nm. Keywords: silver nanoparticle, NaBH4, stabilizer

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