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ALCHEMY Jurnal Penelitian Kimia
Published by Universitas Sebelas Maret
ISSN : 14124092     EISSN : 24434183     DOI : -
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology
ALCHEMY Jurnal Penelitian Kimia is a chemistry journal published by Sebelas Maret University, Surakarta. ALCHEMY Jurnal Penelitian Kimia publishes original research articles or review articles in organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, biochemistry, and environmental chemistry.
Arjuna Subject : -
Articles 12 Documents
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Search results for , issue "Vol 18, No 2 (2022): September" : 12 Documents clear
Sintesis Material Katoda LiNi0,8Mn0,1Co0,1O2 (NMC811) dengan Metode Solid State Menggunakan Nikel Hasil Perolehan Kembali dari Spent Nickel Catalyst Hendri Widiyandari; Rizqia Afifatu Latifah; Arif Jumari; Cornelius Satria Yudha; Shofirul Sholikhatun Nisa
ALCHEMY Jurnal Penelitian Kimia Vol 18, No 2 (2022): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.18.2.63035.214-220

Abstract

Penelitian mengenai sintesis material katoda LiNi0,8Mn0,1Co0,1O2 (NMC811) menggunakan nikel hasil perolehan kembali dari spent nickel catalyst telah berhasil dilakukan menggunakan metode solid state dengan variasi perbandingan padatan spent nickel catalyst/larutan (padatan/larutan) yang digunakan untuk leaching spent nickel catalyst sebesar (20 g/L, 30 g/L, dan 40 g/L). Proses leaching dilakukan menggunakan asam laktat 2 M selama 3 jam dengan suhu 80 ℃. Hasil dari proses ini adalah filtrat nikel laktat dengan endapan sebanyak 1,50 gram, 6,10 gram, dan 9,26 gram. Dalam filtrat tersebut terdapat ikatan hidroksida dan ikatan asam karboksilat. Material katoda NMC811 yang terbentuk memiliki enam puncak difraksi. Puncak difraksi X-ray tertinggi terdapat pada 2 theta 15° ‒ 20° dan 44°. Morfologi permukaan dari material katoda NMC811 menunjukkan terbentuknya partikel yang irregular dengan ukuran yang tidak seragam. Komposisi material katoda menunjukkan bahwa katoda NMC811 berhasil diperoleh dengan kandungan nikel sebanyak 73% ‒ 79%, mangan sebanyak 9% ‒ 13% dan kobalt sebanyak 10% ‒ 13%. Baterai lithium-ion yang dibuat menggunakan katoda NMC811 tersebut memiliki kapasitas masing-masing dengan variasi 20g/L sebesar 15,09 mAh/g, 30 g/L sebesar 28,42 mAh/g dan 40 g/L sebesar 25,57 mAh/g. Synthesis of LiNi0,8Mn0,1Co0,1O2 (NMC811) Cathode Material by Solid State Method Using Nickel Recovered from Spent Nickel Catalyst. Research on the synthesis of NMC811 cathode using nickel recovered from spent nickel catalyst was successfully carried out using the solid-state method with various ratios of solids spent nickel catalyst/solution used for leaching spent nickel catalyst (20 g/L, 30 g/L, and 40 g/L). The leaching process was carried out using 2 M lactic acid for 3 hours at a temperature of 80℃. The result of this process is lactic nickel filtrate with a precipitate of 1.50 grams, 6.10 grams, and 9.26 grams. There are hydroxide bonds and carboxylic bonds in the filtrate. The NMC811 cathode material formed has six diffraction peaks. The highest X-ray diffraction peak is at 2-theta of 15° ‒ 20° and 2-theta of 44°. The surface morphology of the NMC811 cathode material shows the formation of several lumps of non-uniform size. The composition of the cathode material shows that the NMC811 cathode has a nickel content of 73% ‒ 79%, manganese of 9% ‒ 13%, and cobalt of 10% ‒ 13%. The lithium-ion battery made using the NMC811 cathode has a capacity of 20g/L at 15.09 mAh/g, 30 g/L at 28.42 mAh/g, and 40 g/L at 25.57 mAh/g.
Penambatan Molekul dan Simulasi Dinamika Molekular Kandungan Minyak Kayu Manis dan Minyak Serai Dapur Sebagai Antibakteri Methicillin Resistant Staphylococcus aureus Caesart Leonardo Kaharudin; Afif Akmal Afkauni; Aditya Yuan Pramudyansyah; Niko Prasetyo
ALCHEMY Jurnal Penelitian Kimia Vol 18, No 2 (2022): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.18.2.54997.140-147

Abstract

Meluasnya penyebaran Methicillin Resistant Staphylococcus aureus (MRSA) yang kebal terhadap antibiotik β-laktam membuat penelitian untuk menemukan senyawa aktif yang memiliki potensi sebagai antibakteri MRSA menjadi penting. Salah satu penelitian yang dapat dilakukan adalah studi penambatan molekul. Studi penambatan molekul telah dilakukan menggunakan senyawa bahan alam dari minyak kayu manis dan minyak serai dapur dengan reseptor enzim Penicillin Binding Protein 2a (PBP2a). Studi ini memiliki tujuan untuk memprediksi kemampuan senyawa bahan alam dari kedua minyak atsiri tersebut sebagai antibakteri MRSA. Penambatan molekul dilakukan menggunakan perangkat lunak (software) AutoDock 4.2. Hasil penelitian menunjukkan bahwa senyawa dengan potensi sebagai antibakteri paling besar adalah trans-β-kariofilen dan geranil asetat dengan energi ikat sebesar -6,12 dan -5,11 kkal/mol dan konstanta inhibisi sebesar 32,69 dan 180,41 µM. Hasil penambatan molekul kemudian dilanjutkan dengan simulasi dinamika molekular. Hasil simulasi dinamika molekular menunjukkan bahwa kedua senyawa memiliki nilai Root Mean Square Deviation (RMSD) yang tinggi.Molecular Docking and Molecular Dynamics Simulation of Cinnamon Oil and Kitchen Lemongrass Oil as Antibacterial Agent Against Methicillin-Resistant Staphylococcus aureus. The spread of Methicillin-Resistant Staphylococcus aureus (MRSA) caused the research for its antibiotic to become more pressing than ever. One of the research that can be conducted is a molecular docking study. A molecular docking study of natural products from cinnamon and lemongrass oil with Penicillin Binding Protein 2a (PBP2a) enzyme was conducted. This study aims to predict the ability of each natural product to become an MRSA antibiotic. The molecular docking was conducted with AutoDock 4.2 software. The result shows that β-caryophyllene and geranyl acetate have the most potential to become MRSA antibiotics with binding energies of -6.12 kcal/mol and -5.11 kcal/mol and inhibition constants of 32.69 μM and 180.41 µM, respectively. The results of molecular docking were validated using molecular dynamic simulation. Molecular dynamic simulation shows that both complexes have a high root mean square deviation (RMSD) value.

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