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All Journal VALENSI Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan JURNAL KIMIA SAINS DAN APLIKASI Alchemy : Journal of Chemistry Biology, Medicine, & Natural Product Chemistry EduChemia: Jurnal Kimia dan Pendidikan Indonesian Journal of Chemical Science International Journal Of Science, Technology & Management (IJSTM) Jurnal Pengabdian Vokasi

Damar Nurwahyu Bima

Chemistry Department, Faculty Of Sciences And Mathematics, Diponegoro University, Jl. Prof. Soedarto, SH., Tembalang, Semarang|Diponegoro University|Indonesia

Author-ID : 1921168

Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Transportation

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Mengungkap Potensi Metabolit Sekunder Tanaman Herbal Indonesia untuk Menghentikan Metastasis Kanker Payudara: Pendekatan in-silico Amalina, Nur Dina; Suzery, Meiny; Cahyono, Bambang; Bima, Damar Nurwahyu
Indonesian Journal of Chemical Science Vol 9 No 3 (2020)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v9i3.41146

Kanker payudara adalah penyakit dengan kasus kematian tertinggi kedua setelah penyakit kardiovaskular. Kemoterapi yang merupakan pilihan utama terapi kanker hingga saat ini terbukti menyebabkan beberapa efek samping berbahaya. Oleh karena itu, ada kebutuhan mendesak untuk mengembangkan terapi berbasis herbal yang efektif untuk membunuh sel kanker dan meminimalkan efek samping. Dalam penelitian ini, bertujuan untuk mengevaluasi interaksi molekuler secara in silico beberapa senyawa metabolit sekunder herbal Indonesia dengan indikasi terapeutik untuk pengobatan antikanker. Hasil penelitian ini menunjukkan bahwa semua metabolit sekunder dari Citrus sp., Curcuma sp., Caesalpinia sappan, dan Alpinia galanga memiliki interaksi yang lebih kuat dengan protein NF-ÃŽÂºB dibandingkan dengan doksorubisin. Interaksi paling kuat adalah senyawa kurkumin yang merupakan metabolit sekunder dari Curcuma sp. Namun simulasi awal ini hanyalah langkah awal untuk mengembangkan kombinasi senyawa-senyawa tersebut sebagai agen antikanker yang lebih potensial. Lebih penting lahi bahwa senyawa metabolit sekunder dari Citrus sp., Curcuma sp., C. sappan, dan A.galanga berpotensi di kembangkan sebagai agen kemoterapi alami dengan mempengaruhi proliferasi sel.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v9i3.41146

Kanker payudara adalah penyakit dengan kasus kematian tertinggi kedua setelah penyakit kardiovaskular. Kemoterapi yang merupakan pilihan utama terapi kanker hingga saat ini terbukti menyebabkan beberapa efek samping berbahaya. Oleh karena itu, ada kebutuhan mendesak untuk mengembangkan terapi berbasis herbal yang efektif untuk membunuh sel kanker dan meminimalkan efek samping. Dalam penelitian ini, bertujuan untuk mengevaluasi interaksi molekuler secara in silico beberapa senyawa metabolit sekunder herbal Indonesia dengan indikasi terapeutik untuk pengobatan antikanker. Hasil penelitian ini menunjukkan bahwa semua metabolit sekunder dari Citrus sp., Curcuma sp., Caesalpinia sappan, dan Alpinia galanga memiliki interaksi yang lebih kuat dengan protein NF-ÎºB dibandingkan dengan doksorubisin. Interaksi paling kuat adalah senyawa kurkumin yang merupakan metabolit sekunder dari Curcuma sp. Namun simulasi awal ini hanyalah langkah awal untuk mengembangkan kombinasi senyawa-senyawa tersebut sebagai agen antikanker yang lebih potensial. Lebih penting lahi bahwa senyawa metabolit sekunder dari Citrus sp., Curcuma sp., C. sappan, dan A.galanga berpotensi di kembangkan sebagai agen kemoterapi alami dengan mempengaruhi proliferasi sel.

Synthesis of Mn(II) Complexes-Carboxymethyl Chitosan Schiff Base Salicylaldehyde and Antibacterial Activity Ismiyarto Ismiyarto; Niken Windi Saputri; Liswinda Zafirah Rahmatia; Purbowatiningrum Ria Sarjono; Ngadiwiyana Ngadiwiyana; Nor Basid Adiwibawa Prasetya; Damar Nurwahyu Bima
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 7, No. 1, May 2021
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v7i1.19866

The development of compounds with a better antibacterial activity is highly needed. One way to achieve this is by modifying the structure of the compound using chitosan as a starting material, because of its abundant natural source in Indonesia, its biodegradable properties, and its structure where free amines are present. This study aims to obtain Mn(II) -Carboxymethyl Chitosan Schiff Base-Salicylaldehyde complex to increase its antibacterial activity against Staphylococcus aureus (Gram positive) and Escherichia coli (Gram negative). Schiff Base carboxymethyl chitosan-salicylaldehyde was synthesized from carboxymethyl chitosan with salicylaldehyde. Next, the Schiff Base Carboxymethyl Chitosan-Salicylaldehyde was complexed with MnCl2.4H2O and then characterized by FTIR, UV-Vis Spectrophotometer, and AAS and tested for antibacterial activity with the disc diffusion method against Staphylococcus aureus and Escherichia coli. The product of Carboxymethyl Chitosan Schiff Base-salicylaldehyde is a brownish yellow solid with a yield of 64% (w/w) and has antibacterial activity against Staphylococcus aureus (clear zone diameter 11 mm) and Escherichia coli (clear zone diameter 13 mm). The product of Mn(II) Complexes-Carboxymethyl Chitosan Schiff Base-salicylaldehyde is a black solid with a yield of 59% (w/w) and has antibacterial activity against Staphylococcus aureus (clear zone diameter 13 mm) and Escherichia coli (clear zone diameter 17 mm).

Synthesis, Characterization and Antioxidant Activity of Kobalt (II)-Hydrazone Complex Yulyani Nur Azizah; Irma Mulyani; Deana Wahyuningrum; Damar Nurwahyu Bima
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

The potency of the first-row transition metal complexes with Schiff's base ligand as an antioxidant has been widely studied by researchers. In this study, hydrazone-type Schiff base compounds, salicylaldehyde-2,4-dinitrophenylhydrazone (SDPH), resulted from the condensation of salicylaldehyde (1.5 mmol) and 2,4-dinitrophenylhydrazine (1.5 mmol) were synthesized and characterized with 1H-NMR. The synthesized SDPH was used as ligands in the formation of Co(II) metal complexes. The Co(II)-SDPH complexes were synthesized with reflux reaction at 60oC for 6 hours in molar ratio 1:3. Triethylamine is used to synthesis Co(II)-SDPH, which serves to deprotonate SDPH ligands. ESI-MS analysis showed that the complex is a neutral dimeric complex.The complex has the chemical formula [Co2(SDPH)2[(Et)3N]2(acn)2(OH)2} ([M+Na]+ = 1061 g/ mol), shown on the ESI-MS spectrum. Coordinate bonds between Co (II) metal ions with ligands are observed in the presence of shifting of the C=N wave number, as well as the loss of the vibrating peaks of the O-H groups to the infrared spectra of complexes. The IR spectrum of complexes was suggested that SDPH behave as a bidentate ligand through the azomethine nitrogen atom and phenolic oxygen atom. The ligand and its Co(II) complex have been screened for antioxidant activity against DPPH (2,2-diphenyl-1-picrylhydrazine). Based on the activity test results, the IC50 value of Co(II)-SDPH complex was lower than ligand. These results show that Co(II)-SDPH are potentials as antioxidants.

Electrocoagulation Method Using Al/Graphite Electrode for Removal Surfactant LAS (Linear Alkylbenzene Sulfonate) Nafisa Khairunisa; Suhartana Suhartana; Damar Nurwahyu Bima
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 3 (2021): November 2021
Publisher : Universitas Diponegoro

An increasing number of laundries have caused water contamination by surfactants. One commonly used surfactant is LAS (Linear Alkylbenzene Sulfonate), a material difficult to decompose, polluting the environment. Electrocoagulation was carried out using Al/Graphite electrode, applied to LAS surfactant artistic waste. This study aims to determine the functional ability of the Al/Graphite electrode in reducing surfactant through electrocoagulation. Various variations were carried out, on the voltage parameters (3,6,9,12) Volt; NaCl concentration (0;0.4;0.8;1.2;1.6;2) g/L; pH (3,5,7,9,11) and time (10,20,30,40,50) minutes. To analyze the changes in the sample before and after electrocoagulation, characterization was carried out using a UV-VIS spectrophotometer and FTIR. A kinetic study was conducted to determine the reaction order of electrocoagulation surfactant. Based on a study, removal at condition voltage 9 Volt, initial pH of the solution 9, electrocoagulation time 50 minute, and the addition of NaCl electrolyte 2 g/L, obtained surfactant concentration was 0,785 mg/L with removal efficiency 97,45%. UV-VIS spectra show a decreased absorption at a wavelength of 653 nm. FTIR spectra showed the presence of absorption on the same functional groups, which indicated that most of the surfactant pollutants could be separated from the wastewater through the electrocoagulation process. The second-order reaction was obtained in the surfactant electrocoagulation process.

Electrochemical Peroxidation Method for Reduction of Chemical Oxygen Demand (COD) Carbofuran in Furadan 3GR Pesticides Ayu Sri Wahyuni; Suhartana Suhartana; Damar Nurwahyu Bima
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 2 (2021): July 2021
Publisher : Universitas Diponegoro

Carbofuran is a pollutant compound derived from the pesticide Furadan 3GR which is widely used in agriculture. Various methods of carbofuran degradation have been carried out, one of which is the conventional electrochemical method. This study used an electrochemical peroxidation process to degrade Carbofuran in the pesticide Furadan 3GR. This study aims to determine the optimum conditions (time, Na2SO4 concentration, and volume addition of H2O2) for electrochemical peroxidation and to compare the effectiveness of electrochemical and electrochemical peroxidation methods by measuring the parameter of carbofuran COD reduction. The significance of the electrochemical peroxidation method and the conventional electrochemical method was compared as a preliminary test. The COD reduction of Carbofuran using traditional electrochemical methods and electrochemical peroxidation was 45.76% and 88.70%, respectively. Batch carbofuran electrochemical peroxidation process was accomplished to ascertain the optimum conditions under various operation times, the concentration of Na2SO4, and the additional volume of H2O2. The largest COD reduction of 93.78% was obtained at 10 minutes, 75 mM Na2SO4, and 2 mL H2O2. The UV-Vis spectrophotometric absorption of Carbofuran at a wavelength of 274 nm was significantly reduced from 1.377 to 0.131 at optimum conditions. The IR spectrum measurement results indicate a reduction in absorbance for the N-H group (3383 cm-1) and the C=O group (1643 cm-1) at optimum conditions. Overall, the electrochemical peroxidation process proved to be an appropriate technique for COD reduction of Carbofuran in Furadan 3GR pesticides.

Penentuan Aktivitas Antioksidan Senyawa Kuersetin dan Ekstrak Lengkuas Menggunakan HPLC dan UV-Vis Bambang Cahyono; Christiana Suci Prihatini; Meiny Suzery; Damar Nurwahyu Bima
ALCHEMY:Journal of Chemistry Vol 8, No 2 (2020): ALCHEMY: Journal of Chemistry
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v8i2.10594

The radical scavenging activity of 1,1-diphenyl-2-picrylhidrazyl (DPPH) is generally carried out using a spectrophotometric method. In this study, the value of the antioxidant activity was compared to the HPLC method. Samples used were pure quercetin and extracts of red galangal (Alpinia purpurata) and white galangal (Alpinia galanga). Analysis of antioxidant activity using a UV/Vis spectrophotometer was carried out at a wavelength of 515 nm. Analysis by HPLC method was carried out using an inverse phase with a UV/Vis detector at 515 nm. The results showed that the radical scavenging activity (IC50) of the pure quercetin produced was nearly the same value for the spectrophotometric method (16.24 ppm) dan the HPLC method (15.24 ppm). Even though, the antioxidant activity of pure quercetin was different from the extract. The red galangal extract gave IC50 of 488.43±1.13 ppm (spectrophotometric method) and IC50 of 68.12±10.19 ppm (HPLC method). The radical scavenging activity (IC50) of white galangal extract using the spectrophotometric method and HPLC method was 462.47±2.98 and 62.17±3.87 ppm, respectively. The allegation of other molecular interference in the radical reduction of the extract resulted in a conclusion that the HPLC is better than the spectrophotometric method for determining antoxidant activity of extract sample. Keywords: Antioxidant, Alpinia purpurata, Alpinia galanga, DPPH Aktivitas peredaman radikal 1,1-diphenyl-2-picrylhidrazyl (DPPH) pada umumnya dilakukan menggunakan metode spektrofotometer. Dalam penelitian ini, nilai aktivitas antioksidan tersebut telah dibandingkan dengan metode HPLC. Sampel ujinya adalah senyawa kursetin murni dan ekstrak lengkuas merah (Alpinia purpurata) dan lengkuas putih (Alpinia galanga). Analisis aktivitas antioksidan dengan spektrofotometer UV/Vis dilakukan pada panjang gelombang 515 nm. Analisis dengan metode HPLC dilakukan menggunakan fasa inverse dengan detektor UV/Vis pada 515 nm. Hasil penelitian menunjukkan bahwa aktivitas peredaman radikal senyawa murni kuersetin menghasilkan nilai yang hampir sama untuk kedua metode yaitu IC50 sebesar 17,05 ppm untuk metode spektrofotometer dan IC50 sebesar 15,74 ppm untuk metode HPLC. Akan tetapi, nilai aktivitas antioksidan kuersetin jauh berbeda untuk ekstrak. Ekstrak lengkuas merah memberikan IC50 sebesar 488,43±1,13 ppm (metode spektrofotometer) dan 68,12±10,19 ppm (metode HPLC). Aktivitas peredaman radikal ekstrak lengkuas putih dengan metode spektrofotometer dan HPLC dengan IC50 sebesar 462,89±5,38 dan 62,17±3,87 ppm, berturut-turut. Dugaan adanya interferensi molekul lain dalam analisis peredaman radikal terhadap ekstrak ini menghasilkan suatu kesimpulan bahwa metode HPLC lebih baik digunakan dalam analisis antioksidan dibandingkan metode spektrofotometer untuk sampel berupa ekstrak. Kata kunci: Antioksidan, Alpinia purpurata, Alpinia galanga, DPPH

Optimization of Electrocoagulation Conditions in the Degradation Process of Carbofuran Waste (Furadan 3GR) Using Al/Graphite Electrodes Damar Nurwahyu Bima; Kumala Devi; Suhartana Suhartana; Sriyanti Sriyanti
ALCHEMY:Journal of Chemistry Vol 11, No 1 (2023): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v11i1.15360

Electrocoagulation is one of the electrochemical methods for treating wastewater and separating pollutants. In this research, the electrocoagulation using Al/Graphite electrodes was applied to artistic wastewater containing carbofuran to see the reduction of its chemical oxygen demand(COD). The electrocoagulation process was chosen in this study based on several advantages, including easy to separate between impurities and the sample and a simple operating system. Several parameters such as electrolysis time, variations in electrolyte concentration, and the effect of pH have been investigated for their impact on the electrocoagulation process. The results showed that the proportion of the best reduction in chemical oxygen demand (COD) was 64.40%. The best conditions were an electrolysis time of 60 minutes, an electrolyte concentration of 0.15 M, and a pH of 10. The results also show that the decrease in chemical oxygen demand (COD) dependson those parameters. These results were investigated further by characterization using UV-Vis spectrophotometry and FTIR spectroscopy. The results of the UV-Vis spectrum showed a decrease in intensity at a wavelength of 275 nm. Analysis of the FTIR spectrum between the initial sample and the results of the electrocoagulation showed that there were similar absorption peaks but with much smaller intensity, indicating that the effluent's pollutants have been deposited.Keywords: Electrocoagulation, Carbofuran, Al/Graphite, COD

Enhanced Antibacterial Efficacy of Ag(I), Cu(II), and Zn(II) Modified Sodalite Zeolite Against Escherichia coli and Staphylococcus aureus Sriatun Sriatun; Khairini Pertiwi; Choiril Azmiyawati; Mukhammad Asy'ari; Damar Nurwahyu Bima; Nor Aida Zubir
Jurnal Kimia Sains dan Aplikasi Vol 27, No 10 (2024): Volume 27 Issue 10 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.10.477-484

Sodalite zeolite modified with metal ions Ag+, Cu2+, Cu2+, and Zn2+ was successfully synthesized and evaluated for antibacterial activity. The research aims to obtain silver, copper, and zinc metal-modified sodalite separately and determine their antibacterial activity on Escherichia coli and Staphylococcus aureus bacteria. Sodalite zeolite was synthesized using ludox and sodium aluminate through hydrothermal methods, ensuring uniform crystal growth and optimal crystallinity, as confirmed by X-ray diffraction (XRD) analysis. The average particle sizes of the modified zeolites were determined to be 54.9 nm for Ag-Zeolite, 37.2 nm for Cu-Zeolite, and 28.56 nm for Zn-Zeolite, with structural changes observed through alterations in peak intensity. Scanning Electron Microscopy - Energy Dispersive X-ray (SEM-EDX) analysis showed no significant change in the zeolite’s morphology. In addition, the EDX results showed the presence of Ag (3.15%), Cu (3%), and Zn (2.41%) metals indicating successful ion exchange. Antibacterial assays revealed that Cu-Zeolite demonstrated superior efficacy inhibition zones against Escherichia coli (14.04±1.26) and Staphylococcus aureus (20.74±0.48), highlighting its potential as an antimicrobial agent. The mechanism of action involved the controlled release of metal ions, disrupting bacterial cell membranes and metabolic processes. Notably, Cu2+ ions exhibited the strongest antibacterial properties due to their smaller ionic radius and higher electronegativity than Ag+ and Zn2+. This research underscores the promising applications of metal-ion-modified sodalite zeolite in medical and environmental contexts.

Synthesis, Characterization, and Micellar Behavior of Amphiphilic Chitosan Bearing Sulfate and Anisaldehyde Imine Groups Herayati, Herayati; Wahyuningrum, Deana; Bima, Damar Nurwahyu; Sari, Indah Puspita
Biology, Medicine, & Natural Product Chemistry Vol 14, No 2 (2025)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2025.142.905-909

Amphiphilic chitosan derivatives bearing sulfate and anisaldehyde imine (anisimine) groups were successfully synthesized and characterized for potential applications as functional biomaterials. The synthesis involved two key steps: (1) sulfation of chitosan using chlorosulfonic acid to introduce O-sulfate groups, and (2) Schiff base formation via reaction with p-anisaldehyde to generate N-anisimine functionalities. Structural modifications were confirmed by Fourier-transform infrared (FTIR) spectroscopy, which showed characteristic absorption bands at ~1250 cm-¹ and ~820 cm-¹ corresponding to O=S=O stretching of sulfate, and a C=N stretch at ~1640 cm-¹ indicating imine formation. Proton nuclear magnetic resonance (1H-NMR) spectra further verified the successful attachment of aromatic protons from p-anisaldehyde and the disappearance of primary amine peaks, confirming imination. The amphiphilic behavior and micelle-forming ability of the N-anisimine-O-sulfated (NAOS) chitosan were evaluated using pyrene as a hydrophobic fluorescent probe for determining the critical micelle concentration (CMC), which was found to be 0.012 mg/mL. The observed low CMC value indicates strong self-assembly capability in aqueous media. These results suggest that NAOS chitosan possesses promising structural and surface-active properties suitable for advanced applications in drug delivery and cosmetic formulations.

Co-Authors Amalina, Nur Dina Ayu Sri Wahyuni Bambang Cahyono Choiril Azmiyawati Christiana Suci Prihatini Deana Wahyuningrum Herayati, Herayati Indah Puspita Sari, Indah Puspita Irma Mulyani Ismiyarto Ismitarto Khairini Pertiwi Kumala Devi Liswinda Zafirah Rahmatia Meiny Suzery Mohd Ridwan Mukhammad Asy'ari Nafisa Khairunisa Ngadiwiyana M.Si. S.Si. Niken Windi Saputri Nor Aida Zubir Nor Basid Adiwibawa Prasetya Nudin, Burhan Purbowatiningrum Ria Sarjono Seno Darmanto Sriatun Sriatun Sriyanti Sriyanti Suhartana Suhartana Yulyani Nur Azizah Yuniarto Yuniarto, Yuniarto Yusuf Umardani

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