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Alchemy
ISSN 1412-4092 · Universitas Sebelas Maret · 307 artikel di indeks
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Artikel Jurnal
Organic Waste Management Innovation through Composting Technology with Local Bio-Activators
This research is part of a strategic research program in environmental technology and renewable energy focused on climate change mitigation. Organic waste management through composting technology is a strategic approach to reduce waste generation and the potential for methane (CH₄) emissions from…
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Artikel Jurnal
Chemical Composition and Aromatherapy-Based Relaxation Potential of Selected Indonesian Herbal Essential Oils
Aromatherapy, an alternative treatment approach, is gaining popularity in Indonesia due to its ability to provide psychological and physiological relaxation. The use of Indonesian herbal plants, especially Syzygium polyanthum (bay leaf), Camellia sinensis (green tea), Cymbopogon citratus…
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Artikel Jurnal
Identification of Antioxidant Compounds using the DPPH Radical Scavenging Method from Ethanol and Methanol Extracts of the Leaves and Fruits of the Renggak Plant (Ammomum dealbatum R.)
This study aims to screen antioxidant compounds from the renggak plant (Amomum dealbatum R.). Screening of phytochemicals was carried out on the leaves and peel of the renggak fruit by the extraction method using ethanol and methanol solvents. Extraction was carried out by maceration, and the…
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Artikel Jurnal
Synthesis of Ni2+/Natural Zeolite by Electro-Ion Exchange
Electro-ion exchange was carried out to synthesize Ni2+/natural zeolite at room temperature using various concentrations of Ni(NO3)2 of 0.05, 0.1, 0.15, and 2.0 M, zeolite wetting times of 0 and 24 hours, electrolysis times of 1, 2, and 3 hours, and voltages of 7.5, 15, and 28.4 V. The amount of…
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Artikel Jurnal
The Influence of Solvent and Heating Time Toward the Percent Yield of Sumbermanjing Pyrophyllite-Polyethylene Glycol (PEG) 6000 Composites
The synthesis of clay-polymer composites has attracted considerable interest due to their promising potential properties. The composites were prepared from Sumbermanjing pyrophyllite and polyethylene glycol (PEG) 6000. This research aims to evaluate the influence of solvent and heating time on the…
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Artikel Jurnal
Kitolod (Isotoma longiflora Presi) Leaf Extract as a Bioreductor in Silver Nanoparticle Synthesis
Silver nanoparticles (AgNPs) were synthesized using kitolod (Isotoma longiflora Presi) leaf extract as a bioreductor. This research aims to investigate the ability of extracts to act as reducing agents in the formation of AgNPs and to characterize the resulting AgNPs. The synthesis was carried out…
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Artikel Jurnal
Physical and Chemical Properties of Bacterial Cellulose-Based Bioplastic Innovation from Sago Liquid Waste for Eco-Friendly Secondary Food Packaging
The increasing demand for plastic food packaging has raised concerns over the environmental impact of plastic waste. Previous research has used sago liquid waste as a primary food packaging material, namely, edible coatings on tomatoes and edible films on sausages. However, research on secondary…
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Artikel Jurnal
Determination of Tetracycline Antibiotic Residue Levels in Goldfish (Cyprinus carpio) using High Performance Liquid Chromatography (HPLC)
The method for determining residual levels of tetracycline antibiotics in goldfish (Cyprinus carpio) was validated using High Performance Liquid Chromatography (HPLC). The HPLC method has advantages, including high accuracy, efficiency, ease of operation, and high selectivity and sensitivity. This…
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Artikel Jurnal
Synthesis, Characterization, and DFT Computational Study of Cu(II) Complex with 3-Hydroxybenzoate
This study focuses on the synthesis, characterization, and density functional theory (DFT) computational study of Cu(II) complexes with 3-hydroxybenzoic acid ligands. The synthesis process was carried out by reacting CuCl₂·2H₂O with 3-hydroxybenzoic acid ligands in methanol, refluxing for 3 hours…
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Artikel Jurnal
Preparation and Optimization of Coal Fly Ash-Based Geopolymer and Its Application as an Adsorbent for Basic Yellow 2 and Methylene Blue Dyes
The preparation of geopolymer from coal fly ash (CFA) solid waste of Jepara PLTU has been carried out by activating CFA using a 10 M NaOH solution and Na2SiO3. Characterization of CFA and geopolymer using X-ray fluorescence (XRF), X-ray diffractometer (XRD), Scanning Electron Microscopy (SEM), and…
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Artikel Jurnal
Free Radical Scavenging, Cytotoxic Activity, and Antioxidant-Targeted Molecular Docking Analysis of Akar Kusim Besar (Artabotrys sp.) Methanolic Extract from Ketambe, Indonesia
Akar Kusim Besar (Artabotrys sp.), a vine from the Annonaceae family and an orangutan food source in Ketambe (Indonesia), is known to contain diverse bioactive metabolites. This study evaluated the phytochemical profile, antioxidant activity, cytotoxicity, and molecular docking of its methanolic…
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Artikel Jurnal
The Effect of Co-Processed Excipient and Mannitol on Physical Properties and Release Test of Flavonoid Total of Bajakah Root (Spatholobus littoralis Hassk.) Water Extract in Effervescent Granule
Bajakah root is traditionally used in herbal medicine and exhibits notable antioxidant activity (IC₅₀ = 0.155 mg/mL) with a total flavonoid content of 32.49 ppm. However, conventional consumption by boiling is limited by poor taste, odor, and low stability. To overcome these limitations, this study…
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Artikel Jurnal
Phloroglucinol Compounds and Their Derivatives: Comparison of FTIR, NMR, and Bioactivity Characterization as Antibacterial, Antioxidant, and Anticancer Agents
Research on phloroglucinol (PG) and its derivatives has been extensively pursued over the past three decades. PG compounds are found in many plants, such as in the genus Callopyillum, the genus Hypericum, Eucalyptus kino, and brown algae. PG compounds have a symmetrical compound structure and…
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Artikel Jurnal
Synthesis and Characterization of Carrageenan-Chitosan Milkfish Scales-Based Hydrogel for Slow-Release Fertilizer
This study aims to develop a superabsorbent hydrogel as a slow-release fertilizer based on a combination of carrageenan-glucomannan and carrageenan-chitosan derived from milkfish (Chanos chanos) scale waste. The hydrogel was synthesized by chemical crosslinking with glutaraldehyde concentrations of…
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Artikel Jurnal
In Silico Study of Moringa Leaf (Moringa oleifera L.) Compounds as an Antiproliferative in Hepatocellular Carcinoma against TGF-β Receptor
Liver cancer is a condition in which liver cells grow uncontrollably. Liver cancer, also known as hepatoma, occurs when cells proliferate and acquire malignant properties. Liver cancer is among the types of cancer with a high contribution to global mortality rates each year. This study aims to…
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Artikel Jurnal
Synthesis and Characterization of an Adsorbent from Chicken Eggshell and Its Application for Methyl Orange
Eggshell is a part that protects egg components from various external threats, including chemical, physical, and biological factors. This study aimed to obtain an adsorbent from chicken eggshells using physical and chemical activation techniques. The quality of the eggshell-derived adsorbent was…
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Artikel Jurnal
Optimization Depolymerization of Tilapia Fish Scale Chitosan by Oxidative Degradation with H2O2 using Central Composite Design (CCD)
Tilapia fish scales are among the fishery wastes that have not been optimally utilized, even though they have economic potential when processed into chitosan. Chitosan is a poly(2-amino-2-deoxy-β-D-glucose) obtained by deacetylation of chitin, with a high molecular weight ranging from 100 to 1.200…
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Artikel Jurnal
Synthesis of Carbamate-Modified Cellulose Biocoagulant from Jengkol (Archidendron pauciflorum) Peel via Crosslinking Method for Lead Removal from Wastewater
Heavy metal pollution poses a serious environmental and health threat. An effective and environmentally friendly solution to mitigate this issue is the use of cellulose-based coagulants derived from jengkol (Archidendron pauciflorum) peel waste modified with carbamates. Cellulose isolated from…
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Artikel Jurnal
Modification of Chroman Derivative Compounds and Their In Silico Antibacterial Activities
This study reports the alkaline reflux synthesis of 6-chloro-4-chromanone (Ch) with the secondary amine dimethylamine (DA) to obtain chromanone-derived compounds with potential antibacterial activity. Spectroscopic analyses confirmed that 6-chloro-3-((dimethylamino)methyl)chroman-4-one (Ch-DA) was…
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Artikel Jurnal
Formulation and Stability of Miana Leaf Extract Spray Gel with Antioxidant
The extract of Miana leaves (Coleus scutellarioides L.) is recognized for possessing potent antioxidant Action. This research aimed to develop a physically stable spray gel incorporating miana leaf extract and to evaluate its antioxidant potential through the 1,1-diphenyl-2-picrylhydrazyl (DPPH)…