Article
Chemistry, Applied
Subramaniyan Vinoth, Sea-Fue Wang
Summary: This study developed an electrochemical sensor using a hybrid nanocomposite material to accurately detect the presence of theophylline in food. The sensor showed a wide linear range, low limit of detection, and high sensitivity. The technique was successfully used to identify theophylline in real food samples such as chocolate, coffee, and black tea.
Article
Electrochemistry
Heba M. El Sharkawy, Aya M. Mohamed, Nageh K. Allam
Summary: In this study, V2O5@MnO2 nanocomposites were efficiently synthesized and their properties were characterized. The nanocomposite exhibited excellent performance as a negative electrode in supercapacitor devices, with high specific capacitance and outstanding operating voltage range.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Somayeh Tajik, Mohammad Bagher Askari, Sayed Ali Ahmadi, Fraiba Garkani Nejad, Zahra Dourandish, Razieh Razavi, Hadi Beitollahi, Antonio Di Bartolomeo
Summary: In this study, a highly sensitive ZnFe2O4/reduced graphene oxide (ZnFe2O4/RGO) nanocomposite was developed for electrochemical detection of hydrazine using a simple hydrothermal protocol. The screen-printed electrode (SPE) modified with the ZnFe2O4/RGO nanocomposite showed excellent electrocatalytic activity for hydrazine oxidation and selective determination of micromolar hydrazine concentrations. Differential pulse voltammetry exhibited a broad linear dynamic range and low detection limit for hydrazine detection.
Article
Environmental Sciences
Mehmet Luetfi Yola
Summary: In this study, a molecularly imprinted electrochemical sensor based on CdMoO4/g-C3N4 nanocomposite was prepared for the determination of carbendazim in fruit juice samples. The sensor exhibited satisfactory selectivity, stability, reproducibility, and reusability, making it suitable for application in food safety.
Article
Chemistry, Physical
Rozita Monsef, Masoud Salavati-Niasari
Summary: In this study, an ultra-high sensitive MV-CHT nanocomposite was introduced for electrochemical monitoring of HCQ. The MV nanostructures were prepared via sol-gel pechini route and stabilized using maleic acid as a structure-directing agent. The MV-CHT modified electrode showed excellent analytical performance with a wide linear range, low detection limit, and high sensitivity and selectivity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Nadiyah Alahmadi, Huda S. Alhasan, Hassanien Gomaa, Adel A. Abdelwahab, Mohammed Y. Emran
Summary: A nanocomposite-based electrode material was synthesized for the detection of hydrazine in environmental samples. The CuO nanosheets decorated Cellulose acetate butyrate surface showed high sensitivity and selectivity, making it suitable for the fast screening of hydrazine.
MICROCHEMICAL JOURNAL
(2022)
Article
Environmental Sciences
Neda Ziaie, Mehdi Shabani-Nooshabadi
Summary: A new electrochemical sensor based on LFMO/CCN is developed for the detection of pantoprazole sodium. The sensor shows good performance in measuring PNZS in various drug formulations, with the use of EIS and differential pulse voltammetry methods to achieve accurate detection results.
Article
Materials Science, Multidisciplinary
Gaffar Sarwar Zaman, Ibrahem Waleed, Ruaa Ali Obeid, Shaymaa Abdulhameed Khudair, Saafa Abaas Abd Al-Kahdum, Kadhum Al-Majdi, Ahmed S. Abed, Ali Alsalamy, Maytham T. Qasim, Ahmed Hussien Radie Alawadi
Summary: We used a new three-dimensional carnation flower-like Tb3+/Co3O4 nanocomposite to modify a screen-printed electrode (SPE) and detected Zearalenone in real dairy, juices, and other liquid food specimens. The as-prepared sensor showed high electrical conductivity, large surface area, abundant binding sites, and excellent stability. The electrochemical analysis of the modified electrode demonstrated a wide linear dynamic range and a narrow limit of detection for Zearalenone concentration.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Multidisciplinary
Azar Dehnavi, Ahmad Soleymanpour
Summary: A highly sensitive electrochemical sensor for the determination of guaifenesin was developed using a modified pencil graphite electrode, which showed significantly enhanced electrode response during the modification process. The effective surface area of the electrodes was determined using the chronocoulometry method, with an increase in surface area at each electrode modification step. After optimization, the sensor displayed a linear relationship between GF concentration and peak current within a certain range.
Article
Chemistry, Applied
Atul Kapoor, Varnika, Pratibha, Jaspreet Kaur Rajput, Dinesh Singh, Nikhil Kumar, Jigyasa
Summary: In this study, a novel ternary nanocomposite Bi2O3@MWCNT@g-C3N4 was developed for electrochemical detection of Riboflavin. The synthesized material exhibited impressive electrocatalytic response, broad linear detection range, and good stability and repeatability.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2022)
Article
Chemistry, Analytical
Suphatsorn Thimoonnee, Kanpitcha Somnet, Pattanun Ngaosri, Sanoe Chairam, Chanpen Karuwan, Wichayaporn Kamsong, Adisorn Tuantranont, Maliwan Amatatongchai
Summary: We report a new ready-to-use sensor for simultaneous determination of paraquat (PQ) and glyphosate (GLY) based on a graphite screen-printed electrode modified with a dual-molecularly imprinted polymer coated on a mesoporous silica-platinum core. The sensor shows good linear calibration curves and high selectivity, making it suitable for simultaneous detection of PQ and GLY concentrations in water samples.
ANALYTICAL METHODS
(2022)
Article
Chemistry, Multidisciplinary
Tebogo R. Tsekeli, Tsholofelo Sebokolodi, Hassan Karimi-Maleh, Omotayo A. Arotiba
Summary: Silver nanoparticles were synthesized and loaded onto exfoliated graphite layers to form a composite, which was then compressed into a pellet and used as an electrochemical sensor for bisphenol A detection. The sensor showed linear response to BPA concentrations, with a low detection limit and good reproducibility. The method was successfully applied to determine bisphenol A in thermal paper samples with accurate recovery rates.
Article
Chemistry, Analytical
Olga Dominguez-Renedo, A. Marta Navarro-Cunado, M. Asuncion Alonso-Lomillo
Summary: Cholesterol is an important biomarker for diseases such as heart and coronary artery diseases or arteriosclerosis, and its fast determination in blood is crucial for early diagnosis. Electrochemical sensors and biosensors have emerged as potential tools for selective and sensitive detection of cholesterol, combining the analytical advantages of electrochemical techniques with modified electrodes' selective recognition abilities. This review focuses on the development of electrochemical sensors for cholesterol, distinguishing between enzymatic biosensors and non-enzymatic systems, with emphasis on lab-on-a-chip devices. Different electrode modification procedures and the role of functional materials are also discussed.
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Venkatachalam Vinothkumar, Rajalakshmi Sakthivel, Shen-Ming Chen, Arumugam Sangili, Tae Hyun Kim
Summary: In this study, a Sr@Mn3O4 anchored graphene oxide (GO) electrocatalyst was developed for the detection of nitrofurantoin (NFT). The synergistic activity of Sr@Mn3O4 with GO enhances the specificity and sensitivity of NFT detection. The fabricated Sr@Mn3O4/GO-modified electrode shows a wide dynamic linear range, low limit of detection, and good sensitivity for NFT.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Multidisciplinary Sciences
Jiameng Li, Jiayin Liu, Ziyue Wu, Xue Shang, Ya Li, Wenxing Huo, Xian Huang
Summary: In this study, a fully printed bioresorbable electrochemical device was developed for real-time glucose monitoring. The device utilizes bioresorbable materials and a molybdenum-tungsten reference electrode to achieve stable electrode potential and accurate detection. In vitro and in vivo experiments demonstrated the device's performance and biocompatibility, indicating its potential for mass manufacturing high-performance bioresorbable electrochemical devices.
Article
Biochemistry & Molecular Biology
Eulogio J. Llorent-Martinez, Ana Gordo-Moreno, Maria Luisa Fernandez-de Cordova, Carlos Salazar-Mendias, Amanda Tercero-Araque
Summary: This study investigated the phenolic composition and antioxidant activity of the threatened species Cathissa reverchonii and assessed the influence of environmental factors on its phenolic profile and bioactivity. Results showed differences in the phytochemical profile between the two populations analyzed.
Article
Chemistry, Analytical
A. Ruiz-Medina, J. Jimenez-Lopez, E. J. Llorent-Martinez
Summary: The study proposed a modified LSL method with enhanced sensitivity and selectivity through the use of CQDs in the system, successfully applied in PPN residue detection, demonstrating the potential of using nanoparticles in LSL systems for novel and simple analytical methods in the agri-food sector.
Article
Chemistry, Analytical
Pablo Montoro-Leal, Mohammed Zougagh, Antonio Sanchez-Ruiz, Angel Rios, Elisa Vereda Alonso
Summary: A modified screen-printed carbon electrode was designed for the determination of malondialdehyde (MDA), an important biomarker of oxidative stress. A novel hybrid nanomaterial (MGO@MIPy) was synthesized by coating magnetic graphene oxide (MGO) with a molecularly imprinted polypyrrole (MIPy). The nanocomposite exhibited magnetic properties for separation and manipulation of analyte, and the electroactive molecule MDA-DAN was used as a template for synthesis. The developed electrochemical sensor demonstrated excellent analytical performance for the routine monitoring of MDA in serum samples.
MICROCHEMICAL JOURNAL
(2022)
Article
Plant Sciences
Marta Oliveira, Caroline Sprengel Lima, Eulogio J. Llorent-Martinez, Herve Hoste, Luisa Custodio
Summary: The use of plants and their metabolites is a promising option for controlling gastrointestinal nematode infections. However, the influence of environmental and phenological factors on the metabolomics and biological properties of target plants is often overlooked. This study investigates the variations in anthelmintic properties and chemical composition of Cladium mariscus extracts and finds that these variations may be influenced by seasonal factors and plant organ parts. The study also identifies polyphenolic compounds that exhibit anthelmintic activity and suggests their potential use as nutraceutical and/or phytotherapeutic drugs.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Chemistry, Analytical
Cristina Montes, Natalia Villamayor, M. Jesus Villasenor, Angel Rios
Summary: A selective and sensitive fluorescent nanoprobe (S,N-GQDs) was designed for detection and discrimination between free and quercetin-loaded nanoemulsion in food samples. The method showed high sensitivity, a wide linear dynamic range, and accurate discrimination between different forms of quercetin.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Applied
Desta Woldetsadik, Hillette Hailu, Solomie Gebrezgabher, Mary Njenga, Ruth Mendum, Ana Gordo-Moreno, Maria Luisa Fernandez-de Cordova, Eulogio J. Llorent-Martinez
Summary: This study determined the levels of various minerals in food aids and examined their potential for mineral provision for pregnant and lactating women. The results showed that cereals had low dietary significance for potassium, calcium, and zinc, while corn soya blend and pulses played a key role in mineral intakes.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2023)
Article
Biochemistry & Molecular Biology
Shanoo Suroowan, Eulogio J. Llorent-Martinez, Gokhan Zengin, Kalaivani Buskaran, Sharida Fakurazi, Ashraf N. Abdalla, Asaad Khalid, Bao Le Van, Mohamad Fawzi Mahomoodally
Summary: This study investigated the phytochemical composition and biological activities of the endemic plant Tambourissa peltata from Mauritius. Different solvents were used for phytochemical extraction and HPLC-MS and other assays were employed for composition determination. The aqueous extract showed the highest phenolic and phenolic acid contents, while the ethyl acetate extract had the highest flavonoid content. The methanolic extract exhibited the highest antioxidant activity and acetylcholinesterase inhibition, while the ethyl acetate extract showed notable activity against BChE. The methanolic extract also demonstrated cell cytotoxicity to human colorectal carcinoma cells without damaging normal cells. The results highlight the multifaceted biological properties of T. peltata.
Article
Biochemistry & Molecular Biology
Shanoo Suroowan, Eulogio Jose Llorent-Martinez, Gokhan Zengin, Stefano Dall'Acqua, Stefania Sut, Kalaivani Buskaran, Sharida Fakurazi, Bao Le Van, Mohnad Abdalla, Ashraf N. Abdalla, Asaad Khalid, Mohamad Fawzi Mahomoodally
Summary: In this study, the phytochemical and pharmacological properties of Ravenala madagascariensis were investigated. The aqueous extract showed prominent antioxidant activity, while the methanolic extract exhibited the best antioxidant potential and acetylcholinesterase inhibition. The extracts also demonstrated activity against alpha-amylase, alpha-glucosidase enzymes, and cytotoxicity against HT29 cells.
Article
Biochemistry & Molecular Biology
Eulogio J. J. Llorent-Martinez, Ana I. I. Gordo-Moreno, Maria Luisa Fernandez-de Cordova, Antonio Ruiz-Medina
Summary: This study aimed to analyze the phytochemical composition and antioxidant activity of commercial food supplements based on Moringa oleifera. The phenolic content of methanolic extracts was determined using HPLC-DAD-ESI-MSn, and antioxidant activity was assessed through ABTS(center dot+) and DPPH assays. The results showed that kaempferol and quercetin glucosides were the main contributors to the phenolic profile, and higher phenolic levels corresponded to higher antioxidant activity. The findings provide insights into the potential benefits of consuming Moringa oleifera-based food supplements.
Editorial Material
Biochemical Research Methods
Angel Rios, Wolfgang J. Parak
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Kouadio I. Sinan, Sakina Yagi, Eulogio J. Llorent-Martinez, Antonio Ruiz-Medina, Ana I. Gordo-Moreno, Azzurra Stefanucci, Adriano Mollica, Kouadio Bene, Gokhan Zengin
Summary: The leaf of Secamone afzelii exhibits high antioxidant and enzyme inhibition activities, with a rich content of flavonoids. The extracts of 80% and 100% methanol showed the highest total phenolics and total flavonoids content. Additionally, the 80% methanol extract displayed the best antioxidant and enzyme inhibition activities.
Article
Spectroscopy
Daniela J. S. Silva, Joao A. V. Santos, Joana C. N. Pinto, Eulogio J. Llorent-Martinez, Paula C. Castilho, Luis A. E. Batista de Carvalho, Maria Paula M. Marques, Maria Joao Barroca, Aida Moreira da Silva, Ricardo M. F. da Costa
Summary: The spectrochemical analysis of Corema album leaves was conducted to investigate the changes in antioxidant activity and the accumulation of phenolic compounds in different sexes and seasons. The results showed that phenolic content and antioxidant activity were higher in males and increased between the earlier and the latest harvests. Late summer or early autumn harvests are preferable for higher yearly content of bioactive compounds.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Analytical
Eulogio J. Llorent-Martinez, Julia Jimenez-Lopez, Antonio Ruiz-Medina
Summary: We propose a modification of terbium-sensitized luminescence by introducing nanoparticles, which improves the sensitivity and selectivity of the analytical methods. The introduction of carbon quantum dots into the system reacts with terbium, providing a time-resolved luminescence probe. The use of this system for the determination of the neonicotinoid imidacloprid showed low detection limits and good recovery rates, making it suitable for screening purposes in quality control laboratories.
JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Francesca Ferraris, Carlos Adelantado, Andrea Raggi, Sara Savini, Mohammed Zougagh, Angel Rios, Francesco Cubadda
Summary: A method using ICP-MS and microwave-assisted acid digestion was developed for the determination of total titanium in food and food supplements. The method was successfully validated and enables rapid screening of food samples for the presence of TiO2 particles.
Article
Chemistry, Multidisciplinary
Esther Pinilla-Penalver, Adrian Esteban-Arranz, Ana M. Contento, Angel Rios
Summary: A novel fluorescent sensor based on the competitive interactions between riboflavin, catechin, and graphene oxide (GO) has been proposed in this study. The sensor shows sensitivity and selectivity, making it suitable for environmental analysis control and determination of catechin in food samples.
