cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Teguh Endah Saraswati
Contact Email
teguh.kimia@staff.uns.ac.id
Phone
-
Journal Mail Official
alchemy@mipa.uns.ac.id
Editorial Address
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sebelas Maret University
Location
Kota surakarta,
Jawa tengah
INDONESIA
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 306 Documents
 27   28   29   30   31 
Chemical Composition and Aromatherapy-Based Relaxation Potential of Selected Indonesian Herbal Essential Oils Nurina Rizka Ramadhania
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.114348.60-73

Abstract

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 (lemongrass), Lavandula angustifolia (lavender), and Citrus limon (lemon) in aromatherapy has long been recognized for its distinctive, refreshing aroma and diverse secondary metabolites. This scientific literature review is presented to reveal the relationships between the presence and diversity of chemical composition of selected Indonesian herbal plants and various influencing factors, such as plant origin and the extraction method used. The aroma-defining properties of eugenol, geraniol, linalool, citral, and limonene in essential oils, when combined, can synergistically trigger bioactivities, including antioxidant, antibacterial, anti-inflammatory, and relaxing effects. Scientifically, the relaxing effects of aromatherapy are produced through stimulation of the olfactory system, which connects to the limbic system in the brain, including the amygdala and hypothalamus, which are responsible for improving mood and enhancing emotional regulation. Based on this review, the metabolite profile of essential oils plays a role in determining their potential bioactivity, especially in selected herbal plants as sources of natural relaxation therapy.
Organic Waste Management Innovation through Composting Technology with Local Bio-Activators Eka Putra Ramdhani; Hilfi Pardi; Nola Ritha
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.112491.88-94

Abstract

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 anaerobic decomposition. This study aimed to analyze the effectiveness of local microorganism (MOL) bioactivators, namely rice MOL (P1), banana mob MOL (P2), and fruit MOL (P3), in accelerating composting, compared to controls (without the addition of MOL). The results showed that fruit MOL (P3) is the most effective bioactivator for accelerating decomposition and improving compost quality. This treatment achieves the fastest maturity in 40 days with the lowest C/N ratio and the highest macronutrient content (Nitrogen (N), Phosphorus (P), Potassium (K)) compared to other treatments. These findings confirm that the application of local bioactivators can significantly improve the efficiency of campus organic waste management and support environmental sustainability.
Synthesis of Carbamate-Modified Cellulose Biocoagulant from Jengkol (Archidendron pauciflorum) Peel via Crosslinking Method for Lead Removal from Wastewater Alpan Sofyan Tanjung; Rifda Adillah; Muhammad Fajrul Rahman; Yulia Eka Putri
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.102384.246-253

Abstract

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 jengkol peel was successfully modified with carbamate derived from urea through a crosslinking method. The formation of cellulose and carbamate crosslinks was confirmed by Fourier transform infrared (FTIR) spectroscopy, which showed new absorption peaks corresponding to amide (–NH2) and nitrile (CN) functional groups. Morphological observations using a scanning electron microscope (SEM) showed changes in the shape of cellulose fibers after modification with carbamate, where carbamate cellulose exhibited a denser fiber morphology with larger pore sizes. Elemental analysis revealed the presence of nitrogen in carbamate-crosslinked cellulose, indicating that the cellulose has successfully bonded with the carbamate derived from urea. The decrease in heavy metal lead (Pb) concentration in wastewater samples was achieved by adding 1.5 g of carbamate-modified cellulose, resulting in 96.87% Pb removal. These results show that the cellulose-based biocoagulant from jengkol peel waste, modified with carbamate via crosslinking, has been successfully synthesized and significantly reduced the concentration of the heavy metal Pb.
Physical and Chemical Properties of Bacterial Cellulose-Based Bioplastic Innovation from Sago Liquid Waste for Eco-Friendly Secondary Food Packaging Aminah Maryani; Nur Arfa Yanti; La Ode Ahmad Nur Ramadhan; Reza Kurniawan
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.109471.191-199

Abstract

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 food packaging has not been conducted. The method used in this research involves a series of stages, from synthesizing bacterial cellulose to make bioplastics. The bioplastics were made with bacterial cellulose fermented from sago liquid waste and mixed with varying compositions of carboxymethyl cellulose (CMC), zinc oxide (ZnO), polyvinyl alcohol (PVA), and glycerol. Chemical characteristics, as determined by functional group analysis, showed that bioplastics still exhibited the typical functional groups of bacterial cellulose, as well as additional groups from glycerol, CMC, PVA, and ZnO, indicating the success of chemical structure modification in bioplastics. The crystallinity level of bioplastics also increased with the concentration of the mixture, with the highest crystallinity value of 37.084% in bioplastic sample A4. The physical characteristics of bioplastics, such as transparency, thickness, moisture content, water solubility, water uptake, and water vapor transmission rate, increased with increasing bioplastic mixture.
Determination of Tetracycline Antibiotic Residue Levels in Goldfish (Cyprinus carpio) using High Performance Liquid Chromatography (HPLC) Agung Abadi Kiswandono; Anisa Rahmawati; Yanesta Oxvyena; Purna Pirdaus; Sonny Widiarto; Sutopo Hadi; Rinawati Rinawati
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.90319.138-147

Abstract

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 research aims to develop a method for determining tetracycline residues and tetracycline levels in goldfish meat obtained from eight markets in Bandar Lampung City. The analytical method carried out was optimized for the composition and flow rate of the mobile phase. Optimization results show a composition of acetonitrile:water = 35:65 and a flow rate of 0.5 mL/minute. The method validation parameters carried out are linearity, precision, accuracy, selectivity, Limit of Detection (LoD), and Limit of Quantitation (LoQ). The linearity results obtained from this research were R2 = 0.9980. This method has repeatability precision with a Relative Standard Deviation (%RSD) value of 1.35%, and reproducibility precision with %RSD values of 0.96% and 1.14%, respectively. The %recovery method value is 101.05%. The LoD and LoQ values for this method are 0.27 and 0.90 ppm. Measurement of tetracycline antibiotic residue levels in carp samples from 8 market locations in Bandar Lampung showed values of 21.77 – 38.58 ppm, with uncertainties of ±0.87 – ±1.42. The method validation results show that the method can be used for routine analysis of tetracycline antibiotic levels in the laboratory.
Sintesis Karbon Aktif dari Tongkol Jagung (Zea mays L.) dengan Metoda Dehidrasi sebagai Elektroda Superkapasitor Olly Norita Tetra; Raihan Hanif Aulia; Deswati Deswati
ALCHEMY Jurnal Penelitian Kimia Vol 21, No 2 (2025): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.21.2.96235.358-368

Abstract

Karbon aktif dari limbah tongkol jagung (Zea mays L.) telah disintesis dengan metoda dehidrasi untuk digunakan sebagai bahan elektroda superkapasitor. Bubuk tongkol jagung didehidrasi dengan H2SO4 1 M dan diaktivasi dengan KOH 5 M pada perbandingan massa karbon dan aktivator 1:2,5, dilanjutkan dengan karbonisasi pada 400 °C selama 1 jam. Hasil karakterisasi SEM menunjukkan terjadinya pembentukan pori pada permukaan karbon aktif dan hasil EDX memberikan persentase karbon 76,99%. Berdasarkan metode isoterm adsorpsi-desorpsi menunjukkan tipe isoterm IV dan histerisis tipe H3 yang menunjukkan struktur karbon aktif adalah mesopori, dengan luas permukaan spesifik 43,176 m2/g, volume pori 0,0855 cm3/g, dan distribusi pori rata-rata adalah 3,96 nm. Pengukuran sifat elektrokimia dari karbon aktif memberikan kemampuan untuk menyimpan energi dengan nilai kapasitansi spesifik sebesar 247,53 F/g dan rapat energi adalah 123,03 Wh/kg. Hasil EIS didapatkan kurva setengah lingkaran dari plot Nyquist yang menunjukkan adanya tahanan kecil untuk transfer muatan. Sintesis karbon aktif dengan metoda dehidrasi dan aktivasi menawarkan keuntungan seperti biaya rendah, proses preparasi sederhana, dan waktu sintesis singkat dengan kinerja elektrokimia yang tinggi untuk superkapasitor.Synthesis of Activated Carbon From Corncob (Zea mays L.) by Dehydration Method for Supercapacitor Electrode. Activated carbon from corn cob waste (Zea mays L.) has been synthesized using a dehydration method as a supercapacitor electrode material. Corn cob powder was dehydrated with 1 M H2SO4 and activated with 5 M KOH at a mass ratio of carbon and activator of 1:2.5, followed by carbonization at 400 °C for 1 hour. SEM characterization showed pore formation on the surface of activated carbon, and EDX results gave a carbon percentage of 76.99%. Based on the adsorption-desorption isotherm method, the isotherm type IV and hysteresis type H3 showed that the structure of activated carbon is mesoporous, with a specific surface area of 43.176 m2/g, a pore volume of 0.0855 cm3/g, and an average pore distribution of 3.96 nm. Measurement of the electrochemical properties of activated carbon provides the ability to store energy with a specific capacitance value of 247.53 F/g, and the energy density is 123.03 Wh/kg. EIS results obtained semicircular curves of Nyquist plots, indicating a slight resistance to charge transfer. The synthesis of activated carbon by the dehydration and activation method offers advantages such as low cost, simple preparation process, and short synthesis time with high electrochemical performance for supercapacitors.

Page 31 of 31 | Total Record : 306

 27   28   29   30   31 

Filter by Year

2014 2026


Reset
Filter By Issues
All Issue Vol 22, No 1 (2026): March Vol 21, No 2 (2025): September Vol 21, No 1 (2025): March Vol 20, No 2 (2024): September Vol 20, No 1 (2024): March Vol 19, No 2 (2023): September Vol 19, No 1 (2023): March Vol 18, No 2 (2022): September Vol 18, No 1 (2022): March Vol 17, No 2 (2021): September Vol 17, No 1 (2021): March Vol 16, No 2 (2020): September Vol 16, No 1 (2020): March Vol 15, No 2 (2019): September Vol 15, No 1 (2019): March Vol 14, No 2 (2018): September Vol 14, No 1 (2018): March Vol 13, No 2 (2017): September Vol 13, No 1 (2017): March Vol 12, No 2 (2016): September Vol 12, No 1 (2016): March Vol 11, No 2 (2015): September Vol 11, No 1 (2015): March Vol 10, No 2 (2014): September Vol 10, No 1 (2014): March More Issue