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SSRN 2023年

作者： Ferri, Elena Russo, Fabiana Vandelli, Maria Angela Paris, Roberta Laganà, Aldo Capriotti, Anna Laura Gallo, Alfonso Siciliano, Augusto Carbone, Luigi Gigli, Giuseppe Citti, Cinzia Cannazza, Giuseppe Department of Life Sciences University of Modena and Reggio Emilia Via G. Campi 103 Modena41125 Italy Clinical and Experimental Medicine PhD Program University of Modena and Reggio Emilia Modena41125 Italy CREA Research Center for Cereal and Industrial Crops Via di Corticella 133 Bologna40128 Italy Department of Chemistry Sapienza University of Rome Piazzale Aldo Moro 5 Rome00185 Italy Department of Chemistry Istituto Zooprofilattico Sperimentale del Mezzogiorno Via Salute 2 Portici80055 Italy Institute of Nanotechnology National Council of Research – CNR NANOTEC Campus Ecotekne Via Monteroni Lecce73100 Italy

Hemp-sprouts are emerging as a new class of attractive functional food due to their numerous health benefits when compared to other sprout species. Indeed, the high content of beneficial components including polyphenols and flavonoids makes this type of food a promising and successful market. However, the available literature on this topic is limited and often conflicting as regards to the content of phytocannabinoids. High-performance liquid chromatography coupled to high-resolution mass spectrometry (HPLC-HRMS) was applied in an untargeted metabolomics fashion to extracts of hemp seeds, sprouts and microgreens of nine different genotypes. Both unsupervised and supervised multivariate statistical analysis was performed to reveal variety-specific profiles of phytocannabinoids with surprisingly remarkable levels of phytocannabinoids even in chemotype V samples. Furthermore, a targeted HPLC-HRMS analysis was carried out for the quantitative determination of the major phytocannabinoids including CBDA, CBD, CBGA, CBG, CBCA, CBC, THCA, and trans-Δ9-THC. The last part of the study was focused on the evaluation of the enantiomeric composition of CBCA in hemp seeds, sprouts and microgreens in the different varieties by HPLC-UV-CD (HPLC-UV with online circular dichroism). Chiral analysis of CBCA showed a wide variability of its enantiomeric composition in the different varieties, thus contributing to the understanding of the intriguing stereochemical behavior of this compound in an early growth stage. However, further investigation is needed to determine the genetic factors responsible for the low enantiopurity of this compound. © 2023, The Authors. All rights reserved.

关键词： High performance liquid chromatography

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Entschlüsselung des Fucose-Migrationsproduktes bei der Massenspektrometrischen Analyse von Blutgruppenepitopen

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Angewandte Chemie 2023年第24期135卷

作者： Maike Lettow Kim Greis Eike Mucha Tyler R. Lambeth Murat Yaman Vasilis Kontodimas Christian Manz Waldemar Hoffmann Gerard Meijer Ryan R. Julian Gert von Helden Mateusz Marianski Kevin Pagel Fritz-Haber-Intitut der Max-Planck-Gesellschaft Deutschland Institute of Chemistry and Biochemistry Freie Universität Berlin Deutschland Department of Chemistry University of California Riverside USA Department of Chemistry and Biochemistry Hunter College The City University of New York USA The PhD Program in Chemistry and Biochemistry The Graduate Center The City University of New York USA

Fucose ist ein signalgebendes Kohlenhydrat, das am Ende der Glykosylierung angehängt wird. Es ist an einer Reihe von Prozessen beteiligt, z. B. an der Selectin-abhängigen Leukozytenadhäsion oder an Pathogen-Rezeptor-Interaktionen. Massenspektrometrische Verfahren, die üblicherweise zur Bestimmung der Struktur von Glykanen eingesetzt werden, zeigen häufig Fucose-haltige, chimäre Fragmente, die die Analyse verzerren. Die Umlagerung, die zu diesen Fragmenten führt – oft als Fucose-Migration bezeichnet – ist seit mehr als 25 Jahren bekannt, aber die chemische Identität des Umlagerungsproduktes bleibt unklar. In dieser Arbeit kombinieren wir Ionenmobilitätsspektrometrie, Massenspektrometrie mit radikalinduzierter Dissoziation, kryogene IR-Spektroskopie und Computersimulationen mittels Dichtefunktionaltheorie, um das Produkt der Umlagerung der prototypischen Trisaccharide Lewis x und Blutgruppe H2 zu bestimmen. Die Struktursuche ergibt, dass die Fucose, die mit einer α (1→6)-glykosidischen Bindung an die Galaktose gebunden ist, das wahrscheinlichste Produkt ist.

关键词： Dichtefunktionatheorie IR-Spektroskopie Ionen in Der Gasphase Kohlenhydrate Massenspektrometrie

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Bio-based adsorbents of cellulose nanofibrils: An experimental and theoretical investigation of methyl orange removal

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Journal of Molecular Liquids 2025年 427卷

作者： Oyarce, Estefanía Cantero-López, Plinio Roa, Karina Boulett, Andrés Yáñez, Osvaldo Pizarro, Guadalupe Sánchez, Julio Departamento de Química Orgánica Facultad de Química y de Farmacia Pontificia Universidad Católica de Chile Santiago Chile Santiago Chile Universidad Andres Bello Facultad de Ciencias Exactas Departamento de Ciencias Químicas Viña del Mar2531015 Chile Facultad de Ciencias Exactas Universidad Andres Bello Santiago8370186 Chile PhD Program in Molecular Physical Chemistry Facultad de Ciencias Exactas Universidad Andres Bello Santiago8370146 Chile Núcleo de Investigación en Data Science Facultad de Ingeniería y Negocios Universidad de Las Américas Santiago7500975 Chile Chile

The removal of dyes from water is an area of great relevance worldwide, and new technologies and materials are therefore continuously investigated. In this context, bioadsorbents based on cellulose nanofibrils (CNF) and poly(vinylbenzyl)trimethylammonium chloride (PClVBTA) were developed to study the adsorption of methyl orange (MO) dye. Radical polymerization enabled the successful creation of these adsorbents, with CNF modifying the physicochemical properties of the base material, as evidenced by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and dynamic compression tests. The adsorption capacities improved with increasing CNF content, reaching an experimental adsorption capacity of 579 mg g−1 for MO when 1.00 wt% CNF was used. The experimental data were fitted to the Elovich kinetic and Langmuir isothermal models, and the thermodynamic parameters indicated that the adsorption is favorable. The adsorption of MO was confirmed by FT-IR, BET isotherms, and energy dispersive spectroscopy (EDS) analysis. Interfering salts in the aqueous medium did not affect significantly, and the adsorbent material was reusable for up to five cycles. Theoretical studies highlighted π interactions and hydrogen bonding, demonstrating that the incorporation of CNF improves the sustainability and performance of the adsorbents in water purification. © 2025 Elsevier B.V.

关键词： Energy dispersive spectroscopy

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AIE-based fluorescent sensing of ciprofloxacin using non-fluorescent 2D silver dimolybdate nanosheets: The synergistic sensor method (SGSM) to switch on non-fluorescent 2D nanosheets into an effective fluorescent biosensor

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Materials Today chemistry 2024年 38卷

作者： Rana, Priyanka Dabur, Deepak Wu, Hui-Fen Department of Chemistry National Sun Yat-Sen University Kaohsiung 70 Lien-Hai Road Kaohsiung80424 Taiwan International PhD Program for Science National Sun Yat-Sen University Kaohsiung80424 Taiwan School of Pharmacy College of Pharmacy Kaohsiung Medical University Kaohsiung807 Taiwan Institute of Medical Science and Technology National Sun Yat-Sen University Kaohsiung80424 Taiwan School of Medicine College of Medicine National Sun Yat-Sen University Kaohsiung80424 Taiwan Institute of Precision Medicine National Sun Yat-Sen University Kaohsiung80424 Taiwan Institute of BioPharmaceutical Science National Sun Yat-Sen University Kaohsiung80424 Taiwan

The development of an efficient method for detecting ciprofloxacin (CIP) is critical due to the potential for significant harm to humans, including the danger of severe liver damage and hematuria associated with increased levels of this drug. In this study, we offer a highly sensitive and highly selective method for fluorescence sensing of the antibiotic ciprofloxacin employing the properties of Aggregation-Induced Emission (AIE) with silver dimolybdate nanosheets (Ag2Mo2O7 NSs). Outstanding structural characteristics of the Ag2Mo2O7 NSs achieved using the hydrothermal method. By carefully controlling the aggregation of the Synergistic Sensor Method (SGSM), we are able to produce a very bright fluorescence response with the ciprofloxacin concentration range from 0 to 250 nM with a low detection limit of 1.1 nM. Quick and ultrasensitive detection has been achieved by the Synergistic effect (SGE) and AIE from the current approach. The SGSM has been shown to be a novel platform for human health monitoring and pharmaceutical quality control. With broad-ranging practical implications, the combination of AIE and silver dimolybdate nanosheets offers a platform for reliable and ciprofloxacin detection. We believe the SGSM is a role model paper for future nano-biosensor detection methods due to the synergistic effect resulting in the AIE and turn-on sensor approach for many non-fluorescent 2D nanosheets. This can open many new doors for the intensive development of 2D nanosheets for future fluorescent sensors without the need to produce fluorescence by the nanosheet itself. © 2024

关键词： Fluorescence

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Graphene Nanoribbons/Manganese Oxide Nanocomposite Modified Electrode for Detection of Antimicrobial Drug Nitrofurantoin

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Journal of Nanomaterials 2023年第1期2023卷

作者： Nagarajan, Ramila D. Magesh, Vasanth Sundramoorthy, Ashok K. Murugan, Preethika Atchudan, Raji Ganapathy, Dhanraj Arya, Sandeep Mahmoud Karami, Abdulnasser Govindasamy, Mani Department of Chemistry V.V.Vanniaperumal College for Women Tamil Nadu Virudhunagar626001 India Centre for Nano-Biosensors Department of Prosthodontics Saveetha Dental College and Hospitals Saveetha Institute of Medical and Technical Sciences Poonamallee High Road Velappanchavadi Tamil Nadu Chennai600077 India Augsburg University Am Technologiezentrum 8 Augsburg86159 Germany School of Chemical Engineering Yeungnam University Gyeongsan38541 Korea Republic of Department of Physics University of Jammu Jammu and Kashmir Jammu180006 India Department of Chemistry College of Science King Saud University Riyadh11451 Saudi Arabia International PhD Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan

The design and development of a new kind of cost-effective electrode material with excellent selectivity and stability are still a great challenge in the field of electrochemical sensors. Recently, researchers have paid more attention to the electrochemical reduction of nitro compounds due to their hazardous nature. Nitro compounds play a vital role in various industrial applications. However, the direct discharge of nitro compounds to the environment as industrial wastewater is harmful. In this study, a nanocomposite made of 1D graphene nanoribbons decorated with manganese dioxide (GNR-MnO2) was prepared to fabricate an electrochemical transducer for the determination of nitrofurantoin (NFT) in biofluids. First, 1D GNR was prepared by unzipping of multiwalled carbon nanotubes. Second, the GNR was decorated with MnO2 by the hydrothermal reduction method. As-prepared GNR-MnO2 nanocomposite was comprehensively characterized by field emission scanning electron microscopy with EDX, XRD, UV-visible, electrochemical impedance spectroscopy, and cyclic voltammetry. Moreover, GNR-MnO2-coated glassy carbon electrode (GCE) exhibited good electrocatalytic activity toward NFT. The electroreduction of NFT was found at -0.40 V which was 50 mV lower than bare GCE. GNR-MnO2 nanocomposite modified GCE showed a well-defined linear reduction peak current for NFT from 10 nM to 1,000 μM. The selectivity of the sensor was also analyzed in the presence of other nitro compounds which confirmed that NFT can be selectively detected at -0.4 V. The GNR-MnO2 modified electrode was also able to separate reduction peaks of other nitro compounds. In addition, the detection of NFT was carried out in human urine samples with a good recovery of 99.60%-98.60%. © 2023 Ramila D. Nagarajan et al.

关键词： Scanning electron microscopy

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Hydrogen-Bonding-Dependent Water-Responsive Actuation of Bacillus subtilis Cell Walls

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Langmuir : the ACS journal of surfaces and colloids 2025年第25期41卷 2025 Jun 13页

作者： Seungri Kim Haozhen Wang Darjan Podbevšek Tong Wang Xi Chen Department of Chemical Engineering The City College of New York New York New York 10031 United States. Advanced Science Research Center (ASRC) The City University of New York New York New York 10031 United States. PhD Program in Physics The Graduate Center the City University of New York New York New York 10016 United States. PhD Program in Chemistry The Graduate Center the City University of New York New York New York 10016 United States.

Water-responsive (WR) materials can exert significant forces when they deform in response to changes in the relative humidity. Recent studies on biological WR materials have brought attention to the potential influence of nanoconfined water on high-energy WR actuation. Here, we investigated the effects of nanoconfined liquids on the WR actuation of cell walls by introducing chaotropic or kosmotropic solutes, known for their impact on the H-bonding network and biomolecule stabilities in aqueous solutions. We discovered that cell walls treated with low-concentration kosmotropic solutes exhibited a significant increase in the WR actuation energy density, reaching 103.3 MJ m, surpassing that of existing actuators. However, higher concentrations of kosmotropic or chaotropic solutes led to decreased WR performance. These findings could be explained by the impact of the solutes on hydration forces and intermolecular interactions, which affect the ultimate WR pressure. This, in turn, provides a pathway toward achieving superior WR actuation performance and advancing the development of high-work-density actuator materials.

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Capnesterones A and B, new steroids isolated from the soft coral Capnella imbricata

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Phytochemistry Letters 2024年 61卷 115-119页

作者： Cheng, Ting-Yu Yang, Chia-Jung Chen, Po-Jen Chen, Yu-Li Peng, Bo-Rong Kung, Te-An Wen, Zhi-Hong Lai, Kuei-Hung Chung, Hsu-Ming Department of Applied Chemistry National Pingtung University Pingtung 900393 Taiwan Clinical Immunology Laboratory Department of Medical Research E-Da Hospital I-Shou University Kaohsiung 824005 Taiwan Research Center for Chinese Herbal Medicine Graduate Institute of Healthy Industry Technology College of Human Ecology Chang Gung University of Science and Technology Taoyuan 33305 Taiwan Graduate Institute of Biomedical Sciences Graduate Institute of Natural Products College of Medicine Chang Gung University Taoyuan 33305 Taiwan Graduate Institute of Pharmacognosy College of Pharmacy Taipei Medical University Taipei 11031 Taiwan Institute of Food Safety Management National Pingtung University of Science and Technology Pingtung 91201 Taiwan Department of Marine Biotechnology and Resources National Sun Yat-sen University Kaohsiung 804201 Taiwan Institute of BioPharmaceutical Sciences National Sun Yat-sen University Kaohsiung 804201 Taiwan PhD Program in Clinical Drug Development of Herbal Medicine College of Pharmacy Taipei Medical University Taipei 11031 Taiwan Traditional Herbal Medicine Research Center Taipei Medical University Hospital Taipei 11031 Taiwan

Two new non-withanolidal steroids with a cross-conjugated dienone structural unit in ring A, capnesterones A (1) and B (2), were isolated from the soft coral Capnella imbricata in the southeast waters of Taiwan. The compounds' structures were elucidated through a comprehensive analysis of spectroscopic data, including IR, ESIMS, ¹H NMR, and ¹³C NMR, and through comparison with previous literature. At a concentration of 10 μM, steroids 1 and 2 exhibited reductions in iNOS levels (60 % and 82 %) compared to LPS-stimulated control cells, along with increased release (134 % and 110 %) against COX-2 protein expressions. © 2024 Phytochemical Society of Europe

关键词： Capnella imbricata COX-2 INOS Steroid

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Synthesis of Gadolinium-Doped Molybdenum Diselenide Nanospheres for Ultrasensitive Electrochemical Determination of Essential Amino Acid in Human Serum and Milk Samples

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Journal of the Electrochemical Society 2023年第5期170卷 057501-057501页

作者： Jeromiyas, Nithiya Govindasamy, Mani Alothman, Asma A. Ouladsmane, Mohamed Huang, Chi-Hsien National Kaohsiung University of science and Technology Kaohsiung City81157 Taiwan Department of Chemistry Korea University Seongbuk-gu Seoul Korea Republic of Faculty International PhD Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan Department of Research and Innovation Saveetha School of Engineering SIMATS Thandalam Chennai602105 India Chemistry Department College of Science King Saud University Riyadh11451 Saudi Arabia Department of Materials Engineering Ming Chi University of Technology New Taipei City243303 Taiwan Biochemical Technology R&D Center Ming Chi University of Technology New Taipei City243303 Taiwan

The electrocatalytic activity and electronic conductivity of 2D transition metal chalcogenides are usually enhanced by as follows the ideal strategy such as doping or substitution heterogeneous atoms. Here, a rare Earth metal ion of gadolinium (Gd3+) was doped with MoSe2 and synthesized through the hydrothermal method. The morphology and nanostructure of Gd3+ with MoSe2 spheres were analyzed under X-ray diffraction, Fourier-transform infrared spectroscopy, X-ray photoelectron, High-resolution transmission electron microscopy analysis, Field emission scanning electron microscopy, and energy-dispersive spectroscopy. Furthermore, the Gd3+ doped MoSe2 sphere modified glassy carbon electrode (Gd@MoSe2/GCE) was used for the sensing of tryptophan. The Gd@MoSe2 modified GCE shows remarkable sensing performance of tryptophan resulting in a linear range (20 nM-220 μM) with a low detection limit (6.7 nM). Under the optimal condition, the developed electrochemical sensor was successfully used to determine tryptophan (TRP) in blood serum and milk samples. The electrochemical biosensing results suggest that the doping of the Gd3+ doped MoSe2 sensor is a promising electrocatalyst in biological and food samples. © 2023 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.

关键词： Amino acids

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Strengthening the Link Between Fullerenes and a Subset of Diffuse Interstellar Bands

arXiv

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arXiv 2025年

作者： Majaess, Daniel Harriott, Tina A. Seuret, Halis Morera-Boado, Cercis Massa, Lou Matta, Chérif F. Department of Chemistry and Physics Mount Saint Vincent University HalifaxNSB3M2J6 Canada Department of Mathematics and Statistics Mount Saint Vincent University HalifaxNSB3M2J6 Canada Centro de Investigaciones Químicas IICBA Universidad Autónoma del Estado de Morelos Morelos Cuernavaca62209 Mexico IXM-Cátedra Conahcyt-Centro de Investigaciones Químicas IICBA Universidad Autónoma del Estado de Morelos Morelos Cuernavaca62209 Mexico Hunter College The PhD Program of the Graduate Center City University of New York New York United States Department of Chemistry Saint Mary’s University HalifaxNSB3H3C3 Canada Département de Chimie Université Laval QuébecG1V0A6 Canada Department of Chemistry Dalhousie University HalifaxNSB3H4J3 Canada

A debate persists regarding the correlation between the DIBs 9577 and 9632 Å, and whether they share a common molecular carrier (i.e., C+60). A robust high correlation determination emerges after bridging the baseline across an order of magnitude ( 50 − 700 mÅ, r = 0.93 ± 0.02), and nearly doubling the important higher equivalent width domain by adding new Mg II-corrected sightlines. Moreover, additional evidence is presented of possible DIB linkages to fullerenes, whereby attention is drawn to DIBs at 7470.38, 7558.44, and 7581.47 Å, which match the Campbell experimental results for C+70 within 1 Å, and the same is true of 6926.48 and 7030.26 Å for C2+70 . Yet their current correlation uncertainties are unsatisfactory and exacerbated by expectedly low EWs (e.g., EW = 4 mÅ for 6926.48 Å), and thus further observations are required to assess whether they represent a bona fide connection or numerical coincidence. © 2025, CC BY.

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BPS2025 - Flexible and robust labeling and tracking of non-repetitive genomic loci

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Biophysical Journal 2025年第3期124卷 353a-353a页

作者： Alex Raterink Rajarshi P. Ghosh Quanming Shi Linfeng Yang Minh Khue Nguyen Anna-Karin Gustavsson Systems Synthetic and Physical Biology PhD Program Rice University Houston TX USA Howard Hughes Medical Institute University of California Berkeley CA USA Department of Bioengineering Stanford University Stanford CA USA Department of Chemistry Rice University Houston TX USA Department of Biosciences Rice University Houston TX USA

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