Review
Chemistry, Analytical
Hugo M. Santos, Luis B. Carvalho, Carlos Lodeiro, Goncalo Martins, Ines L. Gomes, Wilson D. T. Antunes, Vanessa Correia, Maria M. Almeida-Santos, Helena Rebelo-de-Andrade, Antonio P. A. Matos, J. L. Capelo
Summary: This work presents a tutorial on the capabilities of bioanalytical mass spectrometry in detecting and differentiating viruses at the peptide level, as well as providing diagnosis and prognosis for infected patients. It offers insights into the possibilities of current high-resolution mass spectrometry technology and bioinformatics.
MICROCHEMICAL JOURNAL
(2023)
Article
Multidisciplinary Sciences
Kristine Korzow Richter, Maria C. Codlin, Melina Seabrook, Christina Warinner
Summary: Collagen peptide mass fingerprinting by MALDI-TOF-MS, also known as ZooMS, is a rapidly growing analytical technique in the fields of archaeology, ecology, and cultural heritage. It enables rapid taxonomic identification of large bone assemblages and cultural heritage objects. However, there are limitations that need to be addressed for future advancements.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Microbiology
Arnaud Jabet, Anne-Cecile Normand, Alicia Moreno-Sabater, Jacques Guillot, Veronica Risco-Castillo, Sophie Brun, Magalie Demar, Romain Blaizot, Cecile Nabet, Ann Packeu, Renaud Piarroux
Summary: The objective of the study was to reduce recurrent errors between phylogenetically close species by adding new reference spectra. Diversifying the references and adding spectra from various culture media and culture durations improved identification performance, although confusion remained between certain closely related species.
Article
Microbiology
Camila Morschbacher Wilhelm, Maiara dos Santos Carneiro, Everton Inamine, Afonso Luis Barth
Summary: This study aimed to evaluate an adaptation of the MBT-ASTRA technique for faster antimicrobial susceptibility testing. The adapted method showed high categorical agreement with the standard method, indicating its potential for rapid AST results.
MICROBIOLOGY SPECTRUM
(2023)
Article
Anthropology
Elisabetta Neri, Matthias Alfeld, Nesrine Nasr, Laurence de Viguerie, Philippe Walter
Summary: Through non-invasive chemical analysis, this research reveals the complexity of sculpture painting techniques and the chemical composition of paint layers, providing important insights for the study of ancient sculptures.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2022)
Article
Infectious Diseases
T. Garrigos, C. Neuwirth, A. Chapuis, J. Bador, L. Amoureux
Summary: The study aimed to establish a MALDI-TOF/MS Bruker database including 18 Achromobacter species and evaluate its suitability in laboratory settings. The new database accurately identified 99.4% of isolates, significantly outperforming the Bruker default database at 50.9%. This highlights the potential of using MALDI-TOF/MS with a local database for rapid and accurate identification.
CLINICAL MICROBIOLOGY AND INFECTION
(2021)
Article
Infectious Diseases
Ana Candela, Manuel J. Arroyo, Maria Sanchez-Cueto, Mercedes Marin, Emilia Cercenado, Gema Mendez, Patricia Munoz, Luis Mancera, David Rodriguez-Temporal, Belen Rodriguez-Sanchez
Summary: The study evaluated matrix-assisted laser desorption ionization-iime of flight mass spectrometry (MALDI-TOF MS) and Fourier-transform infrared spectroscopy (FTIR-S) as diagnostic alternatives for the detection of Pseudomonas aeruginosa sequence type (ST) 175 isolates involved in a hospital outbreak. The results showed that the combination of these two technologies, along with machine learning tools, can effectively monitor high-risk clones and isolates in nosocomial outbreaks.
TRANSBOUNDARY AND EMERGING DISEASES
(2023)
Review
Chemistry, Analytical
Judy Gopal, Manikandan Muthu
Summary: Mushrooms have transitioned from a luxury food to a widely accepted nutrient-rich food. Mushroom polysaccharides have become icons of mushroom bioactivity, and the analytical techniques for their analysis have been consolidated and summarized.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2023)
Article
Polymer Science
Hans. R. Kricheldorf, Steffen M. Weidner
Summary: Alcohol-initiated ring-opening polymerizations of L-lactide were investigated, with variations in the alcohol nature, LA/initiator ratio, LA/SnOct2 ratio, and time. Neat SnOct2 exhibited catalytic activity in THF and some aromatic solvents, while its activity was strongly reduced in solvents like 1,3-dioxolane, dimethylformamide (DMF), and N-methyl pyrrolidone (NMP). The formation of cyclization was observed at 115°C in toluene but not at 70°C, which was attributed to the reduced mobility of the initially formed linear chains in toluene.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Analytical
Valentina V. Ilyushenkova, Marina E. Zimens, Nikolay Yu Polovkov, Artyom P. Topolyan, Roman S. Borisov, Vladimir G. Zaikin
Summary: This study presents an efficient method for the highly sensitive determination of dipeptides in biological liquids. The method involves derivatization of peptides followed by mass spectrometry, which allows for the detection of low quantities of dipeptides. The approach was successfully applied to model dipeptides in artificial urine and blood serum, and several dipeptides were identified in real blood serum samples. The use of collision induced dissociation generated characteristic fragmentation mass spectra for rapid identification and quantification. The derivatized dipeptides showed higher sensitivity compared to non-modified dipeptides. Overall, this derivatization approach is valuable for the identification of specific dipeptides in artificial media and dietary supplements.
Article
Biochemistry & Molecular Biology
Eliza Matuszewska, Szymon Plewa, Dagmara Pietkiewicz, Kacper Kossakowski, Joanna Matysiak, Grzegorz Rosinski, Jan Matysiak
Summary: Bee pollen is a valuable medicinal and nutritional product, but its consumption may cause adverse effects due to its unknown composition. This study identified bioactive proteins, including potential allergens, in bee pollen collected in Poland. Standardizing bee pollen is crucial due to its content of both beneficial and harmful compounds, and awareness of allergens can prevent health risks associated with consuming these popular superfoods.
Article
Chemistry, Organic
Bernard Fernandez, Jean Armengaud, Gilles Subra, Christine Enjalbal
Summary: This study investigates the feasibility of using high energy charge remote fragmentations to analyze the N-terminus of proteins, and compares it with low energy collision-induced dissociations. The results show that the amino acid composition significantly affects the dissociation pathways of peptide backbones.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Microbiology
Karl Dichtl, Isabel Klugherz, Hanna Greimel, Josefa Luxner, Julian Koeberl, Simone Friedl, Ivo Steinmetz, Eva Leitner
Summary: This study compared the performance of MALDI Biotyper, EXS2600, and Vitek MS, three commonly used MALDI-TOF MS systems, in testing difficult-to-identify bacteria. The results showed high valid result rates and agreement with sequencing data for all three systems, and low misidentification rates for the majority of isolates.
JOURNAL OF CLINICAL MICROBIOLOGY
(2023)
Article
Polymer Science
Steffen M. Weidner, Andreas Meyer, Hans R. Kricheldorf
Summary: Alcohol-initiated ROPs of L-Lactide at high temperature result in the formation of cyclic and linear PLA. The crystalline structure of cyclic PLA is made up by extended rings, which is different from that of linear PLA. Experimental results further support this interpretation.
Article
Polymer Science
Hans R. Kricheldorf, Steffen M. Weidner
Summary: In this study, HMN or BUND was used as initiators, and SnOct2 was used as the catalyst for the ROPs of L-Lactide. The results showed that when the reaction was carried out in bulk, only linear chains were obtained, while in solution, mixtures of linear and cyclic poly(L-lactide) were obtained, which is different from previous reports. The mass spectra of the cyclic PLAs displayed a saw-tooth pattern after annealing, indicating that cyclic and linear PLAs crystallized separately from the same reaction mixture. Fractionated crystallization from the solution confirmed that cyclic PLAs nucleate and crystallize faster than linear chains.
Article
Chemistry, Physical
Zahrah Ramadlan Mubarokah, Norsuria Mahmed, Mohd Natashah Norizan, Ili Salwani Mohamad, Mohd Mustafa Al Bakri Abdullah, Katarzyna Bloch, Marcin Nabialek, Madalina Simona Baltatu, Andrei Victor Sandu, Petrica Vizureanu
Summary: A silver sulfide (Ag2S) semiconductor photocatalyst film was successfully synthesized using a solution casting method. The study showed that incorporating Ag2S powder into cellulose films reduced the peak intensity of oxygen-containing functional groups, indicating the formation of a composite film. The crystal structure analysis confirmed a monoclinic acanthite Ag2S structure for all prepared samples, and the photocatalytic efficiency of CF/comAg(2)S and CF/syntAg(2)S films was significantly higher compared to bare Ag2S powder under sunlight exposure.
Article
Chemistry, Physical
Ikmal Hakem A. Aziz, Mohd Mustafa Al Bakri Abdullah, Rafiza Abd Razak, Zarina Yahya, Mohd Arif Anuar Mohd Salleh, Jitrin Chaiprapa, Catleya Rojviriya, Petrica Vizureanu, Andrei Victor Sandu, Muhammad FaheemMohd Tahir, Alida Abdullah, Liyana Jamaludin
Summary: This study compares the mechanical performance and microstructure of fly ash geopolymer after 28 days and 10 years of curing, showing that the 10-year aged geopolymer exhibits improved strength development and denser microstructure. The formation of anorthite leads to reduced total porosity and a decrease in pore distribution in the range of 5-30 μm.
Review
Chemistry, Physical
Ismail Luhar, Salmabanu Luhar, Mohd Mustafa Al Bakri Abdullah, Andrei Victor Sandu, Petrica Vizureanu, Rafiza Abdul Razak, Dumitru Doru Burduhos-Nergis, Thanongsak Imjai
Summary: Across the world, proper management of radioactive waste generated from activities associated with the nuclear fuel cycle is essential to ensure the sustainability of the nuclear industry and protect human health and the environment. Cement solidification/stabilization (S/S) is widely used for the encapsulation and disposal of radioactive waste due to its excellent structural strength and radiation shielding effects. In order to improve the performance of cemented waste, extensive efforts have been made to enhance cementation technology and develop special types of cement. This paper reviews the technology and challenges of cement solidification/stabilization of radioactive waste, and discusses modern cement technologies and their applications in the immobilization of hazardous radioactive waste.
Article
Chemistry, Physical
Siti Faqihah Roduan, Juyana A. Wahab, Mohd Arif Anuar Mohd Salleh, Nurul Aida Husna Mohd Mahayuddin, Mohd Mustafa Al Bakri Abdullah, Aiman Bin Mohd Halil, Amira Qistina Syamimi Zaifuddin, Mahadzir Ishak Muhammad, Andrei Victor Sandu, Madalina Simona Baltatu, Petrica Vizureanu
Summary: This paper investigates the influence of a dimple-microtextured copper substrate on the performance of Sn-0.7Cu solder alloy. Dimples with a diameter of 50 μm were created by varying the laser scanning repetitions, while the spacing between the dimples was kept constant at 100 μm. The solder joints' wettability, microstructure, and growth of intermetallic compound (IMC) layer were analyzed to assess the impact of the dimple-microtextured copper substrate. Increasing the laser scan repetitions deepened the dimples, resulting in higher surface roughness. The solder joints exhibited decreased contact angle and increased IMC thickness with increasing dimple depth. The copper element was more evenly distributed in the dimple-microtextured copper substrate compared to the non-textured counterpart.
Article
Chemistry, Physical
Chirawat Wattanapanich, Thanongsak Imjai, Reyes Garcia, Nur Liza Rahim, Mohd Mustafa Al Bakri Abdullah, Andrei Victor Sandu, Petrica Vizureanu, Petre Daniel Matasaru, Blessen Skariah Thomas
Summary: This article numerically analyzes the behavior of prestressed reinforced concrete slabs strengthened with externally bonded fiber-reinforced polymer (FRP) sheets. The study finds that increasing the thickness or elastic modulus of the FRP strengthening affects the bonding efficiency and can lead to earlier debonding failures. A tapering technique is proposed to reduce stress concentrations and improve overall strengthening performance. The tapering successfully reduces bond stress concentrations by up to 15% and helps prevent concrete rip-off and peel-off debonding failures.
Review
Chemistry, Physical
Nur Bahijah Mustapa, Romisuhani Ahmad, Wan Mastura Wan Ibrahim, Mohd Mustafa Al Bakri Abdullah, Nuttawit Wattanasakulpong, Ovidiu Nemes, Andrei Victor Sandu, Petrica Vizureanu, Ioan Gabriel Sandu, Christina W. Kartikowati, Puput Risdanareni
Summary: There is a growing global demand for ceramic materials with applications in various industries. The conventional approach has limitations such as high temperature requirements and issues with agglomeration. Researchers have shown interest in using geopolymer to produce ceramics due to its ability to lower sintering temperature and improve strength. The review aims to study the effects of sintering mechanisms on the crystallization and strength of geopolymer ceramics, and presents future research opportunities.
Editorial Material
Chemistry, Physical
Andrei Victor Sandu
Summary: This editorial highlights the results of the second Special Issue dedicated to obtaining and characterizing new materials, which includes one review paper and 13 research articles. The most important fields covered are materials in civil engineering, focusing on geopolymers, insulating materials, and developing new methods. Other important fields include materials for environmental issues and human health.
Article
Chemistry, Physical
Normah Kassim, Shayfull Zamree Abd Rahim, Wan Abd Rahman Assyahid Wan Ibrahim, Norshah Afizi Shuaib, Irfan Abd Rahim, Norizah Abd Karim, Andrei Victor Sandu, Maria Pop, Aurel Mihail Titu, Katarzyna Bloch, Marcin Nabialek
Summary: The objective of this study is to identify the accurate design parameter that can be emphasized in producing a sustainable design of EPS cushion packaging. Through the experimental method and design simulation analysis, four main elements were found to necessitate careful consideration: rib positioning, EPS cushion thickness, package layout, and packing size. The results contribute significantly to sustainable design by integrating these elements to reduce and reuse packaging material. As a result, the development cost of the cushion decreased by 48%, mold modification time was significantly saved by 25%, and a 27% reduction in carbon dioxide (CO2) was identified. These findings also aided in the development of a productive packaging design, beneficial to reducing environmental impact and having a significant impact on the manufacturing industry.
Article
Environmental Sciences
Siti Nadhirah Redzuan, Norazian Mohamed Noor, Nur Alis Addiena A. Rahim, Izzati Amani Mohd Jafri, Syaza Ezzati Baidrulhisham, Ahmad Zia Ul-Saufie, Andrei Victor Sandu, Petrica Vizureanu, Mohd Remy Rozainy Mohd Arif Zainol, Gyoergy Deak
Summary: Malaysia has been facing repeated transboundary haze events with high levels of PM10, which has negative effects on human health and the environment. Therefore, understanding PM10 concentration and developing a reliable forecasting model is crucial for early warnings and mitigation measures. This study analyzes PM10 variation and evaluates the performance of quantile regression in predicting PM10 levels during high particulate events.
Article
Chemistry, Multidisciplinary
Cristina Georgiana Lates, Catalin Gabriel Dumitras, Petrica Vizureanu, Andrei Victor Sandu
Summary: This paper proposes a novel cooling concept for future centralized platforms of ECUs in the automotive industry by grouping multiple electronic devices into a single system and cooling them with forced convection dielectric coolant. The improvement is achieved by replacing the inside air with a dielectric coolant and employing an additional prototype system for forced liquid cooling. The study uses DFSS techniques to optimize heat dissipation and demonstrates that forced convection coolant can improve heat dissipation by up to 60% compared to reference modules.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Wan Mohd Arif W. Ibrahim, Mohd Mustafa Al Bakri Abdullah, Noorina Hidayu Jamil, Hasmaliza Mohamad, Mohd Arif Anuar Mohd Salleh, Andrei Victor Sandu, Petrica Vizureanu, Madalina Simona Baltatu, Patimapon Sukmak
Summary: By varying the amount of MK and the liquid-to-solid ratio, MK/HAp specimens with stable hydroxyapatite phase and high tensile strength were successfully prepared at a low sintering temperature of 900°C. The addition of MK in the activated-HAp system can achieve a stable hydroxyapatite phase and better tensile strength at a low sintering temperature.
APPLIED SCIENCES-BASEL
(2023)
Editorial Material
Chemistry, Multidisciplinary
Andrei Victor Sandu
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Vitaliy V. Savinkin, Olga V. Ivanova, Zaure Zh. Zhumekenova, Andrei Victor Sandu, Petrica Vizureanu
Summary: A unique controlled laser head with an adaptive module was developed for stabilizing movement trajectory. The introduction of a laser head solved the scientific and practical problem of restoring the inner surface of a small diameter up to O 44 mm. The laser technology achieved high physical and mechanical properties of the restored pump surface by moving the laser along vectors to form a regular pyramid with opening angles at the top. The optimal values of the coating's microhardness, corrosion resistance, and tribology were achieved by optimizing various factors such as distance, laser radiation power density, focus spot diameter, surfacing speed, and composition of the sprayed powder.
Article
Engineering, Chemical
George-Gabriel Chiriac, Catalin Gabriel Dumitras, Dragos Florin Chitariu, Petrica Vizureanu, Andrei Victor Sandu
Summary: This study investigates the influence of gravity orientation on the cooling effect of a heat sink for a thick film resistor. Both finite element simulations and experimental measurements were conducted to evaluate the accuracy of Siemens Flotherm XT 2021.2 simulation software. The results show that gravity has a significant impact on cooling, regardless of the presence or absence of a thermal interface material. The measured temperatures were reduced by up to 8.2 degrees C through the rotation of the heat sink. The finite element analysis yielded similar temperature values to the experimental measurements.
Article
Art
Yulia Ivashko, Denys Mykhailovskyi, Valerii Tovbych, Justyna Kobylarczyk, Dominika Kusnierz-Krupa, Andrii Dmytrenko, Yuliia Kharaborska, Andrei Victor Sandu
Summary: The article focuses on the reconstruction and repurposing of war-ravaged industrial territories in the East of Ukraine. The revitalization experience of Fabryka Norblina in Warsaw is analyzed as an example. The authors investigate the destruction of objects in the combat zone and the construction process of Fabryka Norblina from 2018 to 2022. Based on their research, proposals are made for utilizing industrial territories in the East of Ukraine during post-war reconstruction.
INTERNATIONAL JOURNAL OF CONSERVATION SCIENCE
(2023)
Article
Chemistry, Analytical
Michel Rocha Baqueta, Augusto Cesar Costa-Santos, Ana Paula Rebellato, Gisele Marcondes Luz, Juliana Azevedo Lima Pallone, Federico Marini, Alexsandro Lara Teixeira, Douglas N. Rutledge, Patricia Valderrama
Summary: This study reports the essential element composition of new Brazilian Canephora coffees and applies chemometric tools for analysis. The results demonstrate the suitability of this method for origin and species discrimination based on the inorganic fraction of coffee.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Mengjie Li, Jiapeng Wang, You Zhou, Yang Chen, Lingying Xia
Summary: A novel photoelectrochemical biosensor based on gold nanoparticles and specific structures was developed for highly sensitive detection of mercury ion. The multiple sandwich structures hindered electron supply and light harvesting, resulting in a weakened PEC signal, while the specific structures extinguished the PEC signal, enabling quantitative detection of Hg2+. The sensor exhibited high selectivity and stability, with potential applications in environmental detection, biological analysis, and medical research.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Mohamed A. Korany, Rasha M. Youssef, Marwa A. A. Ragab, Mostafa A. Afify
Summary: A stability-indicating fit-for-purpose method was developed for the determination of HC, TL, and PS in syrup dosage form. The method successfully separated CL from THY and quantified the analytes using HPLC-DAD. The robustness of the method was assessed through statistical analysis and self-validation.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Lingling Lin, Minyu Li, Ping Li, Chenqing Ye, Huanglong Zhuang, Shaohuang Weng, Feng Chen
Summary: This study developed a highly sensitive and selective electrochemical sensor for simultaneous detection of dopamine and uric acid. The sensor exhibited excellent anti-interference and stability, and could accurately measure dopamine and uric acid in human urine samples.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Peifang Chen, Caiyun Jiang, Zhouping Wang, Hong-zhen Lian, Xiaoyuan Ma
Summary: In this study, a high-performance SERS-active aptasensor was successfully developed for the quantitative analysis of AFB1 in cereal grains, which is of great significance in the field of food safety.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
E. Abas, C. Marina-Montes, C. Perez-Marin, J. Puimedon, J. Anzano
Summary: This study conducted a comprehensive measurement of natural and anthropogenic radionuclides in soil, water, and air in different locations around Deception Island in Antarctica. The results revealed significant levels of 210Pb and anthropogenic 137Cs in soil samples near old human settlements and facilities, as well as detectable levels of 137Cs and 60Co in water samples from old hunting areas. The findings also suggested potential resuspension processes based on higher-than-expected air quality results.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Joao Franciso Allochio, Nayara A. dos Santos, Nathalia dos S. Conceicao, Clara S. D. Baptista, Keyller B. Borges, Valdemar Lacerda Jr, Wanderson Roma
Summary: This study developed a fiber spray ionization mass spectrometry (FSI-MS) method, which shows great potential in detecting illicit drugs. Compared with paper spray ionization mass spectrometry (PSI-MS), FSI-MS demonstrates higher sensitivity in COC detection.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Dina A. Ahmed, Ola G. Hussein, Mamdouh R. Rezk, Mohamed Abdelkawy, Yasmin Rostom
Summary: The main goal of this study was to develop two green chromatographic techniques, HPLC and TLC, for the determination of alcaftadine (ALF) in pharmaceutical formulation and biological samples. The developed HPLC technique showed high efficiency and minimal environmental impact, successfully identifying ALF in the presence of its degradate. The TLC method provided a stability indicating study for ALF and was determined to be safe, green, and eco-friendly.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Abdullah Taner Bisgin
Summary: A green, speedy, and handy method for separation and determination of four commonly used food colorants was established using vortex assisted sequential-simultaneous liquid phase micro-extraction (VA-SS-LPME). The method does not require any instrumental chromatographic techniques. The procedure includes sequential separation steps using different extractants and simultaneous UV-vis spectrophotometric determination steps. The method is environmentally friendly and applicable for determination of colorants in food and pharmaceuticals.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Yifan Zhang, Tong Zhang, Wenjing Ba, Li Liu, Yuan Rao, Xiaodan Zhang, Hanhan Zhang, Xiu Jin
Summary: This paper proposes a novel spectral transfer modelling method based on neural network architecture searching for the asymptomatic prediction of Akizuki pear cork spot disorder. The experiments show that the model by this method is more effective, achieving an accuracy of 82.61%.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Krzysztof Greda, Maja Welna, Anna Szymczycha-Madeja, Pawel Pohl
Summary: For the first time, a dispersive micro-solid phase extraction (D-mu SPE) based on graphene oxide was used for the ultrasensitive determination of Cd. With this method, Cd can be efficiently extracted from a mixture of alkali and alkaline earth metals without the need for an elution step. The combination of D-mu SPE and SAGD OES significantly reduces matrix effects and improves the tolerance of Cd to alkali metals. The method shows simplicity in the measurement system and the commercially available nanosorbent used.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
P. K. Fathima Anjila, G. R. Tharani, Anand Sundaramoorthy, Venkat Kumar Shanmugam, Karthikeyan Subramani, Shanmugavel Chinnathambi, Ganesh N. Pandian, Vimala Raghavan, Andrews Nirmala Grace, Singaravelu Ganesan, Mangaiyarkarasi Rajendiran
Summary: This work proposes a rapid and sensitive spectroscopic method for detecting melamine in food products using rare-earth Terbium-doped Graphene Quantum Dots (Tb-GQDs) synthesized by microwave and simple chemical conjugation methods. The synthesized Tb-GQDs show a spherical shape with a size of approximately 6 nm and a quantum yield of 52%. The maximum detection limit for melamine concentration in milk and milk products is found to be 0.31 μM. The dual emitting Tb-GQDs provide a sensitive and effective platform for real-time detection of melamine in food samples, particularly in milk, and show promising potential in the food industry.
MICROCHEMICAL JOURNAL
(2024)
Review
Chemistry, Analytical
Piyush Dey, Mandeep Kaur, Akhil Khajuria, Dilmeet Kaur, Manpreet Singh, Hema Kumari Alajangi, Neha Singla, Gurpal Singh, Ravi Pratap Barnwal
Summary: Environmental issues, such as the uncontrolled release of dangerous pollutants, have significant impacts on human health. Traditional methods for detecting pollutants require specialized personnel and equipment, but nanotechnology has improved the performance of biosensors. This article discusses the use of nanotechnology in pollutant detection and the associated techniques.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Sa Dong, Qiuyun Shi, Lingjun Guan, Yulong Wang, Pengyan Liu, Cunzheng Zhang, Jianguo Feng
Summary: In this study, a highly sensitive indirect competitive chemiluminescence enzyme immunoassay (icCLEIA) method was developed for the determination of sodium pentachlorophenolate (PCP-Na) and its metabolite pentachlorophenol (PCP). The method showed high specificity and affinity with a detection limit of 0.0032 ng/mL for PCP-Na and 0.0192 ng/mL for PCP. The method had no cross reaction with other chlorophenols compounds except for PCP. The average recoveries in chicken, pork and fish samples were 81.3-105.8% with low coefficient of variation (CV).
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Palaniappan Ilayaraja, Murugan Manivannan, Paramasivam Parthiban
Summary: Nirmatrelvir, an antiviral drug used for the treatment of COVID-19, has been recommended by the World Health Organization. We developed an optimized analytical method for the quantification of Nirmatrelvir and its products, with high sensitivity and a wide linear range. The method also meets the requirements for greenness evaluation.
MICROCHEMICAL JOURNAL
(2024)