Developing A Method To Identify Tyre Particles By Detecting Benzothiazole Via Gc-Ms,
2024
University of Plymouth
Developing A Method To Identify Tyre Particles By Detecting Benzothiazole Via Gc-Ms, Emma Paull
The Plymouth Student Scientist
Tyre particles are a dominant source of microplastic pollution in our environment. However, their chemical and physical properties are poorly understood and no standardised methods for identifying and quantifying them exist. This study looked to develop a method to identify tyre particles using two tyre samples of differing particle sizes, fine (62 - 125 µm) and coarse (250 – 500 µm). Both samples underwent ultrasound-assisted extraction before being analysed via gas chromatography-mass spectrometry (GC-MS) in both full scan and SIM mode, using benzothiazole as a marker. Both samples were also analysed via particle size analysis, scanning electron microscopy (SEM) and …
Development Of A Rapid Method For Pfas Detection And Quantitation In Human Hair,
2024
CUNY John Jay College
Development Of A Rapid Method For Pfas Detection And Quantitation In Human Hair, Justin M. Allen
Student Theses
In recent years, per- and polyfluoroalkyl substances (PFAS) have emerged as a critical focus in environmental and public health research due to their persistent nature and widespread use in products ranging from non-stick cookware to firefighting foams. These "forever chemicals" resist degradation, posing significant ecological and human health risks. While extensive studies have explored PFAS in environmental matrices, research into their presence in human hair remains limited, with only a handful of studies addressing this biomarker's potential. This thesis aims to develop a robust analytical method for detecting PFAS in human hair, leveraging its unique properties to provide a long-term …
Nanofabrication Of Tetraphenyl Porphyrin Surface Assemblies Linked With Tin Tetrachloride: A Scanning Probe Microscopy Investigation,
2024
Louisiana State University and Agricultural and Mechanical College
Nanofabrication Of Tetraphenyl Porphyrin Surface Assemblies Linked With Tin Tetrachloride: A Scanning Probe Microscopy Investigation, Quynh Do
LSU Doctoral Dissertations
Scanning probe microscopy (SPM) and colloidal lithography methods were used to study the covalent coupling of porphyrins to surfaces. In this dissertation, experimental methods for SPM operation, techniques, and applications are described. Measurement of tip-sample interactions between a sharp tip and surface is translated into digital image data maps with x-, y-, and z-data. Colloidal lithography can be used to fabricate test platforms for AFM studies. The periodicity and arrangement of the designed nanostructures is determined by the size of the colloidal particles used for surface masks. Data processing is required to obtain images and topography information from raw AFM …
Liquid Chromatography-Mass Spectrometry Based Metabolomics, Lipidomics And Epitranscriptomics.,
2024
University of Louisville
Liquid Chromatography-Mass Spectrometry Based Metabolomics, Lipidomics And Epitranscriptomics., Raobo Xu
Electronic Theses and Dissertations
Metabolomics and lipidomics are the comprehensive studies of metabolites and lipids in cells, biological fluids, tissues, or organisms. These distinct chemical fingerprints are left behind by cellular processes. Epitranscriptomics is the field that focuses on examining chemical modifications on RNA molecules at the transcriptome level. Liquid chromatography-mass spectrometry (LC-MS) has been widely used in those omics studies. In this dissertation, I developed and applied both untargeted and targeted approaches using LC-MS based various analytical platforms to conduct omics studies. Firstly, I investigated caffeine metabolites in human urine and discovered three potential functional biomarkers to differentiate the stages of alcohol-associated liver …
Novel, Ultra-Fast Electrochemical Sensors For The Enhanced Detection Of Neurotransmitters And Toxic Heavy Metals In Aqueous Solutions,
2024
Florida Institute of Technology
Novel, Ultra-Fast Electrochemical Sensors For The Enhanced Detection Of Neurotransmitters And Toxic Heavy Metals In Aqueous Solutions, Noel Manring
Theses and Dissertations
Neurodegenerative diseases (NDDs) are a growing global health concern, affecting millions of people worldwide. NDDs arise from the progressive loss of neuronal cell function, ultimately leading to cell death. Abnormal levels of neurotransmitters, the chemical messengers in the brain, have also been linked to NDDs. Despite various treatments and medications aimed at alleviating physical and mental symptoms, there is currently no cure or means to halt disease progression. While the exact pathogenesis of NDDs remain poorly understood, cognitive decline is largely attributed to brain volume reduction, particularly in the hippocampus. Clinical studies suggest that environmental factors, such as exposure to …
Preface To Special Issue On Single-Entity Electroanalysis,
2024
a School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, 710049, P.R. China
Preface To Special Issue On Single-Entity Electroanalysis, Fei Li, Yi-Lun Ying, Yi-Ge Zhou
Journal of Electrochemistry
No abstract provided.
Author Spotlight,
2024
Sun Yat-sen University, Zhuhai 519082, China
Author Spotlight, Li-Fang Yang, Joseph W. Sampson, Xiao-Hang Sun, Hai-Qiang Deng, He Zhang, Md Maksudur Rahman, Yang Tao, Hang Ren
Journal of Electrochemistry
No abstract provided.
Single-Entity Collisional Electrochemistry At The Micro- And/Or Nano-Interface Between Two Immiscible Electrolyte Solutions,
2024
School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
Single-Entity Collisional Electrochemistry At The Micro- And/Or Nano-Interface Between Two Immiscible Electrolyte Solutions, Li-Fang Yang, Jun-Jie Chen, Ling-Yu Chen, Si-Qi Jin, Tao-Xiong Fang, Si-Jia He, Liang-Jun Shen, Xin-Jian Huang, Xiao-Hang Sun, Hai-Qiang Deng
Journal of Electrochemistry
Single-entity collisional electrochemistry (SECE) is a branch of single-entity electrochemistry. It can directly characterize entities/particles with single particle resolution through random collisions between particles and electrodes in a solution, and obtain rich physicochemical information, thus becoming one of the frontiers of electroanalytical chemistry in the past two decades. Interestingly, the (micro/nanoscale) sensing electrodes have evolved from a polarizable liquid/ liquid (mercury/liquid) interface to a solid/liquid interface and then to a liquid/liquid interface (i.e., an interface between two immiscible electrolyte solutions, ITIES), as if they have completed a cycle (but in fact they have not). ITIES has become the latest sensing …
Precision Delivery Using Nanopipette For Single-Cell Studies,
2024
Department of Chemistry, The University of Texas at Austin, Austin, TX 78712, USA
Precision Delivery Using Nanopipette For Single-Cell Studies, He Zhang, Maksudur Rahman, Yang Tao, Joseph W Sampson, Hang Ren
Journal of Electrochemistry
Nanopipette based scanning probe technique is a versatile tool in non-contact imaging in biology. In addition to the topographic imaging, its capability of localized delivery of bio-active molecules is emerging. In this mini review, we introduce the applications of nanopipette in single-cell researches with a focus on localized delivery. The working principles of three delivery modes including resistive pulse, pressure-driven flow, and electroosmotic flow-driven delivery are summarized and compared. Their applications in single-cell researches are reviewed. The current technical challenges in scanning ion conductance microscopy-based delivery, and their growing influence in medicine and pharmacologic researches are also discussed.
Journal Of Electrochemistry, The Flagship Journal Of Chinese Chemical Society Electrochemical Committee, Made A Public Appearance At The 22nd National Electrochemical Congress,
2024
Chinese Chemical Society | Xiamen University
Journal Of Electrochemistry, The Flagship Journal Of Chinese Chemical Society Electrochemical Committee, Made A Public Appearance At The 22nd National Electrochemical Congress, Editorial Office Of J.Electrochem.
Journal of Electrochemistry
No abstract provided.
The Award Ceremony Of The 2nd Xiamen University Short Video Abstract Contest For Science And Technology Journal Papers Came To A Successful Conclusion,
2024
Chinese Chemical Society | Xiamen University
The Award Ceremony Of The 2nd Xiamen University Short Video Abstract Contest For Science And Technology Journal Papers Came To A Successful Conclusion, Editorial Office Of J.Electrochem.
Journal of Electrochemistry
No abstract provided.
Editorial: Leveraging Multi-Omics
Approaches To Understand And
Manage Gastrointestinal And
Hepatic Diseases,
2024
University of North Carolina at Chapel Hill
Editorial: Leveraging Multi-Omics Approaches To Understand And Manage Gastrointestinal And Hepatic Diseases, Isis Trujillo-Gonzalez, Paul G. Thomes, Isin Tuna Sakallioglu, Kusum K. Kharbanda
Department of Chemistry: Faculty Publications
The Research Topic “Leveraging multi-omics approaches to understand and manage gastrointestinal and hepatic diseases” proposed by the Frontiers in Pharmacology has attracted a total of four articles on preclinical studies that were covered in three original research manuscripts and one review article. Two research articles were on metabolic dysfunction-associated steatotic liver disease (MASLD), previously named non-alcoholic fatty liver disease (NAFLD), which is now recognized as a predominant cause of chronic liver disease worldwide, affecting over 30% of the adult population (Teng et al., 2023; Miao et al., 2024). Current pharmacological treatments for MASLD are limited and, until a recent FDA-approved …
Confocal Raman Spectroscopy Coupled With In Vitro Permeation Testing To Study The Effects Of Formalin Fixation On The Skin Barrier Function Of Reconstructed Human Epidermis,
2024
UPR CNRS 4301 CBM, département NMNS « NanoMédicaments et NanoSondes », Université de Tours, 31 avenue Monge, 37200 Tours.
Confocal Raman Spectroscopy Coupled With In Vitro Permeation Testing To Study The Effects Of Formalin Fixation On The Skin Barrier Function Of Reconstructed Human Epidermis, Hichem Kichou, Franck Bonnier, Amanda C. Caritá, Hugh Byrne, Igor Choupra, Emilie Munnier
Articles
Confocal Raman Spectroscopy is recognised as a potent tool for molecular characterisation of biological specimens. There is a growing demand for In Vitro Permeation Tests (IVPT) in the pharmaceutical and cosmetic areas, increasingly conducted using Reconstructed Human Epidermis (RHE) skin models. In this study, chemical fixation of RHE in 10% Neutral Buffered Formalin for 24 hours has been examined for storing RHE samples at 4°C for up to 21 days. Confocal Raman Spectroscopy, combined with Principal Components Analysis, revealed the molecular-level effects of fixation, notably in protein and lipid conformation within the stratum corneum and viable epidermis. IVPT by means …
Characterization Of Aromatic Stationary Phases For Uses In High Performance Liquid Chromatography,
2024
University of South Alabama
Characterization Of Aromatic Stationary Phases For Uses In High Performance Liquid Chromatography, Anastasia Davis
Honors Theses
High Performance Liquid Chromatography (HPLC) is an analytical chemist technique used to separate a sample into its components to characterize and study a specific molecule or compound. Traditionally, High-Performance Liquid Chromatography in different industries, such as the environmental and pharmaceutical fields, uses stationary phases that are already well characterized, such as the C18 stationary phase for separation. However, aromatic stationary phases have recently been produced, which have phenyl groups bonded to the interior surface of the column. Still, they have not been well characterized because of how modern they are. This project characterized several aromatic stationary phases (Biphenyl, pentafluorophenyl, and …
A Liquid Crystal-Based Biomaterial Platform For Rapid Sensing Of Heat Stress Using Machine Learning,
2024
University of Arkansas, Fayetteville
A Liquid Crystal-Based Biomaterial Platform For Rapid Sensing Of Heat Stress Using Machine Learning, Prateek Verma, Elizabeth Adeogun, Elizabeth S. Greene, Sami Dridi, Ukash Nakarmi, Karthik Nayani
Poultry Science Faculty Publications and Presentations
Novel biomaterials that bridge the knowledge gap in coupling molecular/protein signatures of disease/stress with rapid readouts are a critical need of society. One such scenario is an imbalance between bodily heat production and heat dissipation which leads to heat stress in organisms. In addition to diminished animal well-being, heat stress is detrimental to the poultry industry as poultry entails fast growth and high yields, resulting in greater metabolic activity and higher body heat production. When stressed, cells overexpress heat shock proteins (such as HSP70, a well-established intracellular stress indicator) and may undergo changes in their mechanical properties. Liquid crystals (LCs, …
Highly Sensitive Detection Of Strontium Ions Using Metal-Organic Frameworks Functionalized Solid-State Nanochannels,
2024
State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
Highly Sensitive Detection Of Strontium Ions Using Metal-Organic Frameworks Functionalized Solid-State Nanochannels, Xu-Gang Wang, Zheng-Xu He, De-Fang Ding, Xue-Qin Luo, Li Dai, Wei-Qi Zhang, Qun Ma, Yu Huang, Fan Xia
Journal of Electrochemistry
Strontium-90, a highly radioactive isotope, accumulates within the food chain and skeletal structure, posing significant risks to human health. There is a critical need for a sensitive detection strategy for Strontium-90 in complex environmental samples. Here, solid-state nanochannels, modified with metal-organic frameworks (MOF) and specific aptamers, were engineered for highly sensitive detection of strontium ion (Sr2+). The synergistic effect between the reduced effective diameter of the nanochannels due to MOF and the specific binding of Sr2+ by aptamers amplifies the difference in ionic current signals, enhancing detection sensitivity significantly. The MOF-modified nanochannels exhibit highly sensitive detection of …
Single Nanobubble Formation On Au Nanoelectrodes And Au@Ws2 Nanoelectrodes: Voltammetric Analysis And Electrocatalysis,
2024
Anhui Province Key laboratory of Biomedical Materials and Chemical Measurement, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, P.R. China
Single Nanobubble Formation On Au Nanoelectrodes And Au@Ws2 Nanoelectrodes: Voltammetric Analysis And Electrocatalysis, Xian-Zhun Luo, Xiao-Hu Chen, Yong-Xin Li
Journal of Electrochemistry
Taking advantage of the extremely small size of the gold nanodisk electrode, the single hydrogen nanobubble generated on the surface of the nanoelectrode was studied to evaluate its hydrogen evolution performance. It was found that compared with the bare gold nanodisk electrode, the bubble formation potential of the gold nanodisk electrode modified with tungsten disulfide quantum dots (WS2 QDs) on the surface was more positive, indicating that its hydrogen evolution activity was higher. Microdynamic model analysis shows that the average standard rate constant of the rate-determining step of the hydrogen evolution reaction of gold nanoelectrodes modified with WS2 …
Platinum Nanoparticle-Based Collision Electrochemistry For Rapid Detection Of Breast Cancer Mcf-7 Cells,
2024
Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals & Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
Platinum Nanoparticle-Based Collision Electrochemistry For Rapid Detection Of Breast Cancer Mcf-7 Cells, Fu-Xing Qin, Ming-Ke Li, Hui-Long Zhou, Wei Wen, Xiu-Hua Zhang, Sheng-Fu Wang, Zhen Wu
Journal of Electrochemistry
Cancer metastasis is the leading cause of death in cancer patients worldwide and one of the major challenges in treating cancer. Circulating tumor cells (CTCs) play a pivotal role in cancer metastasis. However, the content of CTCs in peripheral blood is minimal, so the detection of CTCs in real samples is extremely challenging. Therefore, efficient enrichment and early detection of CTCs are essential to achieve timely diagnosis of diseases. In this work, we constructed an innovative and sensitive single-nanoparticle collision electrochemistry (SNCE) biosensor for the detection of MCF-7 cells (human breast cancer cells) by immunomagnetic separation technique and liposome signal …
Goodbye With Tears! Deep Condolences To Academician Zhao-Wu Tian!,
2024
Chinese Chemical Society | Xiamen University
Goodbye With Tears! Deep Condolences To Academician Zhao-Wu Tian!, Editorial Office Of J.Electrochem.
Journal of Electrochemistry
No abstract provided.
The Adviser Of Journal Of Electrochemistry Professor Christian Amatore Received The Chinese Government Friendship Award,
2024
Chinese Chemical Society | Xiamen University
The Adviser Of Journal Of Electrochemistry Professor Christian Amatore Received The Chinese Government Friendship Award, Editorial Office Of J.Electrochem.
Journal of Electrochemistry
No abstract provided.
