Showing 3,981 - 4,000 results of 4,095 for search '"spectroscopy"', query time: 0.06s Refine Results
  1. 3981

    Adsorbate-driven dynamic active sites in stannosilicate zeolites by Xianfeng Yi, Yao Xiao, Changjiu Xia, Fengqing Liu, Yujia Liu, Yu Hui, Xin Yu, Yucai Qin, Wei Chen, Zhiqiang Liu, Lijuan Song, Anmin Zheng

    Published 2025-01-01
    “…In this study, a dynamic transformation of framework Sn−O−Si sites to Sn−OH/Si−OH pairs and subsequently a pseudo-Brønsted acid in stannosilicate zeolites upon molecular adsorption, which is analogous to various adsorbates/reactants under working conditions, was identified by solid-state nuclear magnetic resonance (NMR) spectroscopy for the first time, which challenges the widespread assumption that the active center structures remain rigid/stable during the catalytic process. …”
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  2. 3982

    Unveiling the charge density wave mechanism in vanadium-based Bi-layered kagome metals by Yi-Chen Yang, Soohyun Cho, Tong-Rui Li, Xiang-Qi Liu, Zheng-Tai Liu, Zhi-Cheng Jiang, Jian-Yang Ding, Wei Xia, Zi-Cheng Tao, Jia-Yu Liu, Wen-Chuan Jing, Yu Huang, Yu-Ming Shi, Soonsang Huh, Takeshi Kondo, Zhe Sun, Ji-Shan Liu, Mao Ye, Yi-Lin Wang, Yan-Feng Guo, Da-Wei Shen

    Published 2024-09-01
    “…Here, employing micro-focusing angle-resolved photoemission spectroscopy (μ-ARPES) and first-principles calculations, we systematically studied the unique CDW order in vanadium-based bi-layered kagome metals by comparing ScV6Sn6 with its isostructural counterpart YV6Sn6, which lacks a CDW ground state. …”
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  3. 3983

    A dextrorotatory residues-incorporated bioactive dodecapeptide against enterohemorrhagic Escherichia coli by Ping Zeng, Xuemei Yang, Kwok-Yin Wong, Sheng Chen, Kin-Fai Chan, Sharon Shui Yee Leung, Lanhua Yi

    Published 2023-06-01
    “…Methods: Spatial conformation of synthetic peptide zp39 (GIIAGIIiKIKk-NH2, lowercase letters indicate dextrorotatory amino acids) was predicted by PEPstrMOD and its secondary structure was further determined by circular dichroism (CD) spectroscopy. Then, standard E. coli O157:H7 strain ATCC 43888 was used to evaluate the bioactivity of zp39. …”
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  4. 3984

    Productive performance in Italian Mediterranean buffaloes after partially replacing dietary starch with simple sugars by Roberta Matera, Gabriele di Vuolo, Giuseppina Pedota, Luca de Luise, Mariateresa Marra, Luca Borzacchiello, Ludovica Capoluongo, Gianluca Neglia

    Published 2023-11-01
    “…Individual milk yield was recorded daily, and 15 days apart, an individual milk sample was collected for milk quality analysis (fat, protein, casein, lactose, urea, β- hydroxybutyrate [BHB] and fatty acids profile) through mid-infrared spectroscopy (Milkoscan FT6000®, Foss Electric). Data were analyzed through a mixed ANOVA. …”
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  5. 3985

    Influence of particle size on NIR spectroscopic characterization of sorghum biomass for the biofuel industry by Md Wadud Ahmed, Carlos A. Esquerre, Kristen Eilts, Dylan P. Allen, Scott M. McCoy, Sebastian Varela, Vijay Singh, Andrew D.B. Leakey, Mohammed Kamruzzaman

    Published 2025-01-01
    “…NIR spectroscopy is a rapid and accurate green technology for high-throughput biomass characterization, including sorghum (Sorghum bicolor), a promising energy crop for the biofuel industry. …”
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    Article
  6. 3986

    The Identification and synthesis of metabolites of 4-(5-methyl-1,3,4-oxadiazole-2-yl)-benzenesulfonamide by Alexander L. Khokhlov, Ilya I. Yaichkov, Anton A. Shetnev, Valeria A. Panova, Julia A. Efimova, Sergey A. Ivanovskiy, Mikhail K. Korsakov, Nikita N. Volkhin, Sergey S. Petukhov

    Published 2024-11-01
    “…The structure of the obtained substances was confirmed by NMR spectroscopy and high-resolution mass spectrometry. At the final stage, animal biological fluids and model samples with the addition of the synthesized compounds were analyzed using HPLC-MS/MS to establish the structure of metabolites.Results and Discussion: N-hydroxy-4-(5-methyl-1,3,4-oxadiazole-2-yl)-benzenesulfonamide, 4-(5-(hydroxymethyl)-1,3,4-oxadiazole-2-yl)-benzenesulfonamide and 4-(5-methyl-1,3,4-oxadiazole-2-yl)-benzenesulfonic acid were identified and synthesized. …”
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  7. 3987

    Bacteria-specific modified nucleoside is released and elevated in urine of patients with bacterial infections by Ryosuke Yamamura, Yu Nagayoshi, Kayo Nishiguchi, Hitomi Kaneko, Keiichi Yamamoto, Koki Matsushita, Miho Shimamura, Akihiro Kunisawa, Korin Sakakida, Takeshi Chujo, Masataka Adachi, Yutaka Kakizoe, Yuichiro Izumi, Takashige Kuwabara, Masashi Mukoyama, Kazuhito Tomizawa

    Published 2025-01-01
    “…In this study, we performed liquid chromatography-mass spectroscopy (LC-MS) analysis of modified nucleosides from the RNA of 23 pathogenic bacteria, revealing 2-methyladenosine (m2A) as a common bacteria-specific modified nucleoside detected in all bacterial RNAs. …”
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  8. 3988

    New Dihydro OO'Bis(Salicylidene) 2,2' Aminobenzothiazolyl Borate Complexes: Kinetic and Voltammetric Studies of Dimethyltin Copper Complex with Guanine, Adenine, and Calf Thymus DN...

    Published 2006-01-01
    “…All complexes have been thoroughly characterized by elemental analysis, and IR, NMR, EPR, and UV-Vis spectroscopy and conductance measurements. The spectroscopic data support square planar environment around the <mml:math alttext="chem{Cu^{II}}"> <mml:msup> <mml:mtext>Cu</mml:mtext> <mml:mrow> <mml:mtext>II</mml:mtext> </mml:mrow> </mml:msup> </mml:math> atom, while the <mml:math alttext="chem{Sn^{IV}}"> <mml:msup> <mml:mtext>Sn</mml:mtext> <mml:mrow> <mml:mtext>IV</mml:mtext> </mml:mrow> </mml:msup> </mml:math> atom acquires pentacoordinate geometry. …”
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  9. 3989

    A Novel Therapeutic Calcium Peroxide Loaded Injectable Bio-adhesive Hydrogel Against Periodontitis by Shaojie Dong, Yukun Mei, Yuwei Zhang, Wenqing Bu, Yifei Zhang, Changjie Sun, Rui Zou, Lin Niu

    Published 2025-02-01
    “…Materials and Methods: Gelatin-oxidized dextran hydrogel loaded with calcium peroxide and penicillin (CP-P hydrogel) was synthesized and characterized using Universal mechanical testing machine, Fourier transform infrared spectroscopy, swelling test, and dissolved oxygen meter. …”
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  10. 3990

    Influence of substrate bias on the properties of CrAlN wear-resistant coating prepared by arc/magnetron composite technology by Xiaoyan NIU, Mingze LIU, Guoqiang DONG, Yujiang WANG, Haoliang TIAN

    Published 2025-02-01
    “…The research comprehensively analyzes how varying substrate bias voltage influences the microstructural morphology, mechanical properties, and frictional behavior of the coatings using scanning electron microscopy, energy-dispersive spectroscopy, X-ray diffraction, nanoindentation, scratch test, and friction and wear tests. …”
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    Article
  11. 3991

    Enhanced Antitumor Efficacy and Reduced Toxicity in Colorectal Cancer Using a Novel Multifunctional Rg3- Targeting Nanosystem Encapsulated with Oxaliplatin and Calcium Peroxide by Xie Y, Zhu M, Bao H, Chen K, Wang S, Dai J, Chen H, Li H, Song Q, Wang X, Yu L, Pei J

    Published 2025-01-01
    “…A multifunctional nanosystem (Rg3-Lip-OXA/CaO2) was established using Ginsenoside Rg3 liposomes targeting glucose transporter 1 overexpressed on the surface of CRC cells to co-deliver OXA and calcium peroxide (CaO2).Methods: The CaO2 nanoparticles were synthesized via the CaCl2-H2O2 reaction under alkaline conditions and characterized using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Rg3-Lip-OXA/CaO2 was prepared through a thin-film hydration approach and characterized; additionally, its stability and release behavior were studied. …”
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  12. 3992

    Diagnostic Accuracy of Non-Invasive Diagnostic Tests for Nonalcoholic Fatty Liver Disease: A Systematic Review and Network Meta-Analysis by Sun Y, Hu D, Yu M, Liang SB, Zheng Y, Wang X, Tong G

    Published 2025-01-01
    “…For diagnosing steatosis stage 1, Hydrogen Magnetic Resonance Spectroscopy (H-MRS, DOR 15,745,657.6, 95% CI 17.2– 1,014,063.59) proved to be the most accurate. …”
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    Article
  13. 3993

    Toxicological Characterization of Six Plants of the Beninese Pharmacopoeia Used in the Treatment of Salmonellosis by Boris Legba, Victorien Dougnon, Esther Deguenon, Jerrold Agbankpe, Maximin Senou, Alidah Aniambossou, Carène Gbaguidi, Kevin Sintondji, Lamine Baba-Moussa, Jacques Dougnon

    Published 2019-01-01
    “…The content of aluminum, chromium, cadmium, copper, iron, lead, zinc, arsenic, selenium, and manganese was measured in 10 mg of each extract by the inductively coupled plasma optical emission spectroscopy (ICPOES) method. The results of our study generally show the absence of significant effect of the extracts on the hematological and biochemical parameters of the rats. …”
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  14. 3994

    Characterization of microplastics in human follicular fluid and assessment of their potential impact on mouse oocyte maturation in vitro by Danyu Ni, Kaidi Yu, Nan Yan, Xiaojiao Chen, Qijun Xie, Yuqin Yang, Wei Jiang, Ye Yang, Junqiang Zhang, Xiufeng Ling

    Published 2025-02-01
    “…Laser direct infrared spectroscopy of 19 hFF samples identified 7956 particles, including 1739 microplastics (21.9 %) from 30 types. …”
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  15. 3995

    Oxygen vacancy-driven spin-transfer torque across MgO magnetic tunnel junctions by L. M. Kandpal, B. Taudul, E. Monteblanco, A. Kumar, K. Katcko, F. Schleicher, P. Gupta, S. Boukari, W. Weber, V. Da Costa, J. D. Costa, T. Bӧhnert, R. Ferreira, P. Freitas, M. Hehn, M. Alouani, P. K. Muduli, D. Lacour, M. Bowen

    Published 2025-01-01
    “…As MTJs are now downscaled to 2 nm, basic experimental data challenge the accepted understanding of their operation. From transport spectroscopy, ferromagnetic resonance experiments and ab-initio calculations it is revealed that the high conductivity of STT-ready MTJs, and the STT effect therein, is mediated by oxygen vacancy complexes within the MgO barrier. …”
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    Article
  16. 3996

    Evaluating oxide nanoparticle exsolution on A-site deficient PrBaCo2O6-δ electrodes by Alfonso J Carrillo, María Balaguer, Cecilia Solís, Andrés López-García, Sylvio Haas, María Fabuel, Blanca Delgado-Galicia, Isabelle Rodriguez, Einar Vøllestad, Sebastian Wachowski, Ragnar Strandbakke, Truls Norby, Jose M Serra

    Published 2025-01-01
    “…Unlike metal-nanoparticle exsolution, increasing the A-site deficiency did not enhance the extent of oxide-nanoparticle exsolution, whereas larger nanoparticles were obtained by increasing the exsolution temperature. Combined Raman spectroscopy and electron microscopy analysis revealed that BaCoO _3 , Co _3 O _4 , and amorphous BaCO _3 nanoparticles were formed on the surface of the double perovskites after the reductive treatments. …”
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  17. 3997

    Dual-sided centripetal microgrooved poly (D,L-lactide-co-caprolactone) disk encased in immune-regulating hydrogels for enhanced bone regeneration by You Wu, Xiaokun Yue, Ying Zhang, Ning Yu, Chengyan Ge, Rui Liu, Zhongying Duan, Lilong Gao, Xinlong Zang, Xin Sun, Deteng Zhang

    Published 2025-02-01
    “…Functional group analysis, surface morphology and hydrophilicity were evaluated using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and an optical contact angle measuring instrument, respectively. …”
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    Article
  18. 3998
  19. 3999

    Pressure‐Enhanced Superconductivity and Structural Phase Transition in Layered Sn4P3 by Hao Ding, Jingyu Hou, Kun Zhai, Xin Gao, Junquan Huang, Feng Ke, Bingchao Yang, Congpu Mu, Fusheng Wen, Jianyong Xiang, Bochong Wang, Tianyu Xue, Anmin Nie, Xiaobing Liu, Lin Wang, Xiang‐Feng Zhou, Zhongyuan Liu

    Published 2025-02-01
    “…Comprehensive measurements using in situ synchrotron X‐Ray diffraction and Raman spectroscopy reveal a structural phase transition with mild distortion of SnP3 building blocks and interlayer shrinkage under high pressure. …”
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    Article
  20. 4000

    Technological dental sealants: in vitro evaluation of material properties and antibiofilm potential by Witalo Pereira de Jesus, Luiza de Almeida Queiroz Ferreira, Washington Henrique Themoteo da Silva, Fernanda Vieira Belém, Ana Paula Turrioni, Cláudia Silami de Magalhães, Mila Fernandes Moreira Madeira, Ivana Márcia Alves Diniz, Marco Aurelio Benini Paschoal

    Published 2025-02-01
    “…Abstract Background Due to the launch of new self-etching and self-adhesive sealing materials combined with the release of bioactive ions in the dental market, this in vitro study aimed to compare physical values of surface roughness (RS), vickers microhardness (VM), compositional energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), microbiological tests (inhibition halo-HI and surface microbial adhesion-MAS) and mechanical microshear bond strength (MBS). …”
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