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All Journal VALENSI International Journal of Renewable Energy Development Jurnal Riset Kimia Jurnal Keramik dan Gelas Indonesia Al-Kimia Chimica et Natura Acta ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry PENDIPA Journal of Science Education Molekul: Jurnal Ilmiah Kimia Jurnal Keramik dan Gelas Indonesia Journal of Advanced Technology and Multidiscipline (JATM)
Yeni Wahyuni Hartati
Departemen Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics

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The Effect of Acetonitrile Solvent on the Quantitative Determination of Europium (III) by Voltammetry and its Optimization using the Box-Behnken Design Uji Pratomo; Ari Hardianto; Yeni Wahyuni Hartati; Husein Hernandi Bahti; Santhy Wyantuti
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.22508

Abstract

There is often a drawback during the determination of Eu in aqueous solvents using the voltammetric method. The current signal from water can reduce that of the element, which causes difficulty while separating the Eu signal from other rare earth elements (REE). Therefore, this study used acetonitrile as a solvent due to its high electrical conductivity and wide potential range. The optimum conditions for the determination of Eu in acetonitrile using the Box-Behnken design include 74.56 seconds deposition time, 0.125 V amplitude modulation, and -2.0 V potential deposition. The platinum electrode's performance showed a recovery value of 98.91% and accuracy and precision (in %RSD) of 96.67% and 1.11%, respectively. Furthermore, detection and quantitation limits of 0.6 mg/L and 5.1 mg/L were recorded from the analysis. It concluded that the differential pulse voltammetry method was applied to determine the presence of Eu in acetonitrile.
Optimization of Aptamer-Based Electrochemical Biosensor for ATP Detection Using Screen-Printed Carbon Electrode/Gold Nanoparticles (SPCE/AuNP) Rahmaniar Mulyani; Nida Yumna; Iman Permana Maksum; Toto Subroto; Yeni Wahyuni Hartati
Indonesian Journal of Chemistry Vol 22, No 5 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.72820

Abstract

Electrochemical biosensors are used to detect adenosine triphosphate (ATP) levels, which are involved in a variety of biological processes, such as regulating cellular metabolism and biochemical pathways. Therefore, this research aims to develop an aptamer-based electrochemical biosensor with Screen Printed Carbon Electrode/gold nanoparticles (SPCE/AuNP) and collect data as well as information related to ATP detection. The modification of SPCE with AuNP increased the analyte’s binding sensitivity and biocompatibility. The aptamer was selected based on its excellent bioreceptor characteristics. Furthermore, aptamer–SH (F1) and aptamer-NH2 (F2) were immobilized on the SPCE/AuNP surface, which had been characterized using SEM, EIS, and DPV. Also, the ATP-binding aptamers were electrochemically characterized using the K3[Fe(CN)6] redox system and Differential Pulse Voltammetry (DPV). According to the optimization results using the Box-Behnken experimental design, the ideal conditions obtained from the factors influencing the experiment were the F1 concentration and incubation time of 4 µM and 24 h, respectively, as well as F1/F2/ATP incubation time of 7.5 min. Meanwhile, for the range of 0.1 to 100 µM, the detection (LoD) and quantification (LoQ) limits were 7.43 and 24.78 µM, respectively. Therefore, this aptasensor method can be used to measure ATP levels in real samples.
Box-Behnken Experimental Design for Electrochemical Aptasensor Optimization on Screen Printed Carbon Electrode/Silica-Ceria Zakiyyah, Salma Nur; Eddy, Diana Rakhmawaty; Firdaus, Muhammad Lutfi; Subroto, Toto; Hartati, Yeni Wahyuni
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 1, May 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i1.27493

Abstract

This study aims to optimize the epithelial sodium channel (ENaC) electrochemical aptasensor with the Box-Behnken experimental design. ENaC is a protein that plays a role in sodium ion transport in several epithelial tissues and is associated with hypertension. The ENaC protein aptamer is held in place in the electrochemical aptasensor by a modified screen-printed carbon electrode (SPCE) of silica-ceria composite (SiO2-CeO2). The unique structure of a silica matrix with high biocompatibility can form composites through a hydrothermal process. The Box-Behnken (BBD) experimental design is an efficient optimization method of factors that affect the experiment at three levels. The FTIR results of the silica-ceria composites were 549.35 cm-1 (Ce-O), 1095.3 cm-1 (Si-O-Si), and 491.28 cm-1 (Si-O). Meanwhile, SPCE/silica-ceria characterized by differential pulse voltammetry (DPV) showed an increase in peak current [Fe(CN)6]3-/4- from 3.190 μA to 9.073 μA. Three experimental factors, aptamer concentration, streptavidin incubation time, and aptamer incubation time, were optimized with BBD and obtained at 0.5 μg.mL-1, 30 minutes, and 1 hour. The optimum conditions observed resulted in a selective current response for ENaC protein detection. The optimization results can be applied to aptamer-based ENaC protein detection in samples.
New Custom Primers for the Detection of SARS-CoV-2 using the Singleplex rRT‒PCR SYBR Green-Based Method with the NSP10 and N genes as Targets Gaffar, Shabarni; Shabrinna, Hanif; Putri, Rafika; Wiraswati, Hesti Lina; Hartati, Yeni Wahyuni; Ishmayana, Safri; Faridah, Lia; Ekawardhani, Savira
Chimica et Natura Acta Vol 13, No 1 (2025)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v13.n1.53493

Abstract

Although COVID-19 is no longer a global health emergency, rapid, sensitive, and specific detection tests are still needed. In this study, we developed a cost-effective test, the SYBR Green-based rRT‒PCR kit, using new custom primers targeting the N and NSP10 genes of the SARS-CoV-2 virus. The specificity of the designed primers was determined through agarose gel electrophoresis. A standard curve generated from a ten-fold dilution of SARS-CoV-2 RNA was used to determine the efficiency and sensitivity of the kit. Validation of this protocol was carried out on ten clinical specimens. As expected, the results showed that the N and NSP10 gene primers produced 134 and 161 bp products, respectively. The limits of detection and limit of quantification with N gene primers were 7.74 and 23.46 copies/μL, respectively, and those with the NSP10 gene primers were 4.69 and 14.21 copies/μL, with a PCR efficiency of 102.5% and 110.6%, respectively. The validation results with clinical specimens revealed that seven samples were true-positive for COVID-19 (Ct range 15.09–21.33), and three were confirmed to be true-negative. Costs associated with COVID-19 patient testing can be anticipated to decrease with the use of custom primers for the detection of SARS-CoV-2 via the use of the singleplex rRT‒PCR mix SYBR Green.
Electrochemical Sensor and Biosensor Detection of Ethanol in Beverage Samples: Irkham, Irkham; Zalfadilah, Faizal Nur; Zein, Muhammad Ihda Hamlu Liwaissunati; Khaerani, Wulan; Zakiyyah, Salma Nur; Hartati, Yeni Wahyuni
Journal of Advanced Technology and Multidiscipline Vol. 4 No. 1 (2025): Journal of Advanced Technology and Multidiscipline
Publisher : Faculty of Advanced Technology and Multidiscipline Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jatm.v4i1.71985

Abstract

Ethanol detection is critical in the beverage industry, where it is essential to monitor alcohol concentrations for quality control and compliance with regulatory standards. Traditional analytical methods, such as gas chromatography and distillation, offer accuracy but are often labor-intensive, time-consuming, and require sophisticated equipment. In contrast, electrochemical sensors and biosensors have emerged as promising alternatives due to their rapid response, portability, cost-effectiveness, and potential for real-time monitoring. Electrochemical sensors, particularly those enhanced with metal nanoparticles like platinum, palladium, or gold, have shown significant improvements in sensitivity, selectivity, and response time. These sensors offer the advantage of miniaturization, making them ideal for on-site analysis, although issues such as electrode stability, susceptibility to interference, and long-term reliability remain. On the other hand, biosensors, which leverage biorecognition elements like alcohol dehydrogenase (ADH) or alcohol oxidase, provide high specificity for ethanol, reducing interference from other compounds commonly found in beverage samples. Recent advancements in biosensor technology have focused on improving sensor stability, enzyme immobilization techniques, and reducing production costs. While biosensors offer high selectivity and sensitivity, they may still face challenges related to enzyme denaturation and environmental factors such as temperature and pH fluctuations. Both electrochemical sensors and biosensors are continuously evolving, with recent developments including the use of nanomaterials and novel biorecognition elements to enhance performance. This review will explore recent advances in electrochemical sensors and biosensors for ethanol detection in beverage samples, highlighting their potential, challenges, and future directions in this field.
Review: Mutasi pada DNA Mitokondria dan Pengaruhnya terhadap Diabetes Melitus Tipe 2 dan Kompleks Forforilasi Oksidatif Azizah, Mamlikatu Ilmi; Mulyani, Rahmaniar; Hartati, Yeni Wahyuni; Maksum, Iman Permana
Chimica et Natura Acta Vol 12, No 2 (2024)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v12.n2.49970

Abstract

Diabetes melitus merupakan penyakit metabolik yang ditandai dengan peningkatan kadar gula dalam darah akibat ketidakmampuan pankreas dalam mensekresikan insulin atau tidak bekerjanya reseptor insulin. Diabetes melitus tipe 2 (DMT2) disebabkan oleh kombinasi faktor genetik, metabolisme, dan lingkungan yang berinteraksi satu sama lain dan berkontribusi dalam gangguan mekanisme kerja insulin. Studi ini mengulas tentang mutasi pada DNA mitokondria (mtDNA) serta mekanisme molekuler dan jalur yang terlibat dalam metabolisme insulin dan fosforilasi oksidatif serta kaitannya terhadap DMT2. Metode yang dilakukan dalam studi ini adalah penelusuran pustaka menggunakan basis data elektronik seperti Google Scholar, ScienceDirect, dan PubMed dengan kata kunci yang berhubungan dengan diabetes melitus, mutasi pada mtDNA, gangguan mekanisme fosforilasi oksidatif, serta kasus diabetes melitus yang disebabkan oleh mutasi pada mtDNA. Studi ini menunjukkan bahwa mutasi pada mtDNA dalam kompleks fosforilasi oksidatif (OXPHOS) berpengaruh pada mekanisme produksi ATP yang dibutuhkan pada sekresi insulin di sel β pankreas. Gangguan sekresi insulin ini menjadi salah satu penyebab keadaan hiperglikemia yang berujung penyakit diabetes.
In-house Multiplex rRT-PCR Assay for Sars-Cov2 Detection in Indonesia using a new primer design Gaffar, Shabarni; Putri, Rafika Nanda; Shabrinna, Hanif; Supriyadi, Isma Yustifania; Wiraswati, Hesti Lina; Ekawardani, Savira; Ishmayana, Safri; Hartati, Yeni Wahyuni; Faridah, Lia
Jurnal Riset Kimia Vol. 16 No. 1 (2025): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v16i1.781

Abstract

During the COVID-19 pandemic, we attempted to develop an in-house rRT-PCR kit, utilizing custom primers targeting NSP14 and RdRp, with the RPP30 gene as an internal control. This kit will support Indonesian independence in enhancing COVID-19 diagnostics. The primer and probe were designed by a bioinformatics tool, determining primer specificity and sensitivity, optimizing probe concentrations, establishing LoD (Limit of Detection), LoQ (Limit of Quantification), and rRT-PCR efficiency, multiplex testing of the rRT-PCR kit on clinical samples, and testing the kit's stability. The in-house rRT-PCR kit can detect NSP14, RdRp, and RPP30 genes. The optimal concentrations for the NSP14, RdRp, and RPP30 probes are 1 μM, 1.5 μM, and 1.5 μM, respectively. The LoD and LoQ for the NSP14 are 0.22 ng/μL and 0.67 ng/μL, and for the RdRp are 1.08 ng/μL and 3.28 ng/μL. The rRT-PCR efficiencies for the NSP14, RdRp, and RPP30 are 80.3%, 100.6%, and 106%, respectively. Detection of ten clinical samples, comprising seven true positive and three true negative samples, showed Ct (Cycle threshold) values of 28–31 for the RPP30 gene, Ct 21–27 for the RdRp gene, and Ct 30–34 for the NSP14 gene. Stability testing of the rRT-PCR kit demonstrated promising results, where the kit stored at -20°C for seven days showed almost no difference in Ct values. This in-house multiplex rRT-PCR will support Indonesian independence in enhancing COVID-19 diagnostics, providing a dependable method for detecting SARS-CoV-2 in clinical samples.
Co-Authors Aga Adi Masyhuri Annisa Ilma Naviardianti Annisa Ilma Naviardianti Ari Hardianto Atiek Rostika Noviyanti Azhari Yusuf Azizah, Mamlikatu Ilmi Budi Adiperdana Diana Hendrati Diana Hendrati Diana Rakhmawaty Eddy Diana Rakhmawaty Eddy Diding Mandala Putra Eddy, Diana Rakhmawaty Egista Istioka Fazrin Ekawardani, Savira Elin Marlin Elsa Nur Utami Fadhilah, Riana Adisti Firdaus, Muhammad Lutfi Hesti Lina Wiraswati Husein Hernadi Bahti Iman Permana Maksum IMAN PERMANA MAKSUM Irkham, Irkham Khaerani, Wulan Lia Faridah Lubis, Rubianto A. M. Lutfi Firdaus M. Lutfi Firdaus Mahendra Permadi Masyhuri, Aga Adi Muhammad Hilman Daniswara Muhammad Yusuf Mulyani, Rahmaniar Nida Yumna Nurmalasari, Ratna Nurul Auliany Pratomo, Uji PUTRI, RAFIKA Putri, Rafika Nanda Rahmaniar Mulyani Ravenna Aristantia Riana Adisti Fadhilah Rini Surbakti Rizki Muharami Cedia Sari Rubianto A. Lubis Rukiah Rukiah Rustaman Rustaman Safri Ishmayana Salma Nur Zakiyyah Santhy Wyantuti Sari Syahruni Savira Ekawardhani Shabarni Gaffar Shabarni Gaffar Shabarni Gaffar Shabarni Gaffar Shabarni Gaffar Shabarni Gaffar Shabarni Gaffar Shabarni Gaffar -, Shabarni Gaffar Shabrinna, Hanif Shauvina, Shauvina A Solihudin Solihudin Supriyadi, Isma Yustifania Titin Sofyatin Toto Subroto Yohan Yohan Yohan Yohan Zakiyyah, Salma Nur Zalfadilah, Faizal Nur Zein, Muhammad Ihda Hamlu Liwaissunati