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Showing 361 - 380 results of 431 for search 'spectral composition (method OR methods)', query time: 0.15s Refine Results
  1. 361

    SERS-based technique for accessible and rapid diagnosis of multiple myeloma in blood serum analysis by Lyudmila A. Bratchenko, Yulia A. Khristoforova, Irina A. Pimenova, Elena N. Tupikova, Maria A. Skuratova, Georgy A. Dvoynikov-Sechnoy, Shuang Wang, Petr A. Lebedev, Ivan A. Bratchenko

    Published 2025-08-01
    “…Surface-enhanced Raman spectroscopy (SERS) is a promising analytical method for studying the structure and composition of multi-component media in clinical practice. …”
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    Article
  2. 362

    Comprehensive characterization of volatile compounds in Iranian black teas using chemometric analysis of GC-MS fingerprints by Adineh Aminianfar, Mohammad Hossein Fatemi, Fatemeh Azimi

    Published 2024-12-01
    “…Subsequently, employing a robust investigative strategy, we utilized for the first time the well-known multivariate curve resolution-alternating least square (MCR-ALS) method as a deconvolution technique to analyze the complex GC–MS peak clusters of tea samples. …”
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    Article
  3. 363

    Magnetic Induction Spectroscopy-Based Non-Contact Assessment of Avocado Fruit Condition by Tianyang Lu, Adam D. Fletcher, Richard John Colgan, Michael D. O’Toole

    Published 2025-07-01
    “…This study demonstrates that the ripeness of avocado fruits can be analyzed using frequency-dependent electrical conductivity and permittivity through a non-invasive Magnetic Induction Spectroscopy (MIS) method. Utilizing an MIS system for conductivity and permittivity measurements of a large sample set (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>N</mi><mo>=</mo><mn>60</mn></mrow></semantics></math></inline-formula>) of avocado fruits across multiple frequencies from 100 kHz to 3 MHz enables clear observation of their dispersion behavior and the evolution of their spectra over ripening time in a completely non-contact manner. …”
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  4. 364
  5. 365

    Advances in Surface-Enhanced Raman Spectroscopy for Urinary Metabolite Analysis: Exploiting Noble Metal Nanohybrids by Ningbin Zhao, Peizheng Shi, Zengxian Wang, Zhuang Sun, Kaiqiang Sun, Chen Ye, Li Fu, Cheng-Te Lin

    Published 2024-11-01
    “…We analyze various fabrication methods that enable precise control over nanostructure morphology, composition, and surface chemistry. …”
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    Article
  6. 366

    Comparing Grid Model Fitting Methodologies for Low-temperature Atmospheres: Markov Chain Monte Carlo versus Random Forest Retrieval by Anna Lueber, Adam J. Burgasser

    Published 2025-01-01
    “…Self-consistent atmosphere models are commonly used for spectral fitting, but computational limits restrict the production of finely sampled multidimensional parameter grids, necessitating interpolation methods to infer precise parameters and uncertainties. …”
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    Article
  7. 367

    Influence of low-intensity artificial light on the fatty acid profile of the biotechnologically important culinary mushroom Pleurotus eryngii in vitro by Oksana Mykchaylova, Aleksander Besarab, Anatoliy Negriyko, Margarita Lomberg, Natalia Poyedinok

    Published 2025-03-01
    “…Conclusions The selected mycelial photoactivation modes using low-intensity laser and LED light of different spectral composition and coherence may have potential in the biotechnology of submerged cultivation of P. eryngii to obtain mycelial mass with an improved fatty acid profile, which can be considered as a useful source of lipids.…”
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    Article
  8. 368

    Fluorescence Spectroscopy and a Convolutional Neural Network for High-Accuracy Japanese Green Tea Origin Identification by Rikuto Akiyama, Kana Suzuki, Yvan Llave, Takashi Matsumoto

    Published 2025-04-01
    “…These similarities are presumed to reflect the comparable growing conditions and processing methods characteristic of the two regions. This study shows the potential of this system in food origin identification, suggesting applications in preventing origin fraud and quality control. …”
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    Article
  9. 369

    Color stability of clear aligners exposed to various beverages: an in vitro study by Chanakarn Kobkiatkawin, Woraphong Panyayong, Suphachai Suphangul, Sasipa Thiradilok

    Published 2025-07-01
    “…The aim of the present study was to evaluate the color stability of clear aligners when exposed to several types of beverages. Methods A total of 704 (seven hundred four, 176 per brand) clear aligner samples from four brands (Beforedent®, Käse Aligner®, Invisalign® and ClearCorrect®) were immersed in three types of beverages (tea, coffee and cola) and a control solution (artificial saliva) for 6 and 12 hours. …”
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    Article
  10. 370

    Frequency characteristic of the acoustic emission signal in concrete under compressive loading by K. POGAN

    Published 2014-05-01
    “…Acoustic Emission measurements are very useful in the investigation of changes taking place in a composite during compressive tests. Among the AE intensity measurements (i.e. counts rate, root mean square, etc.) also the frequency analysis of the AE signal seems to be the useful method. …”
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    Article
  11. 371

    Sequencing Silicates in the Spitzer Infrared Spectrograph Debris Disk Catalog. I. Methodology for Unsupervised Clustering by Cicero X. Lu, Tushar Mittal, Christine H. Chen, Alexis Y. Li, Kadin Worthen, B. A. Sargent, Carey M. Lisse, G. C. Sloan, Dean C. Hines, Dan M. Watson, Isabel Rebollido, Bin B. Ren, Joel D. Green

    Published 2025-01-01
    “…CLUES combines multiple unsupervised clustering methods with multiscale distance measures to discern new groupings and trends, offering insights into compositional diversity and geophysical processes within these disks. …”
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    Article
  12. 372

    Linear Stability Analysis of the Cahn–Hilliard Equation in Spinodal Region by Seokjun Ham, Darae Jeong, Hyundong Kim, Chaeyoung Lee, Soobin Kwak, Youngjin Hwang, Junseok Kim

    Published 2022-01-01
    “…We study a linear stability analysis for the Cahn–Hilliard (CH) equation at critical and off-critical compositions. The CH equation is solved by the linearly stabilized splitting scheme and the Fourier-spectral method. …”
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  13. 373
  14. 374

    Medium wavelength infrared HgCdTe discrete photodetectors by Z. F. Tsybrii, K. V. Andreeva, M. V. Apatska, S. G. Bunchuk, M. V. Vuichyk, O. G. Golenkov, N. V. Dmytruk, V. V. Zabudsky, I. O. Lysiuk, K. V. Svezhentsova, M. I. Smolii, F. F. Sizov

    Published 2017-12-01
    “…FTIR transmission spectra were measured to evaluate samples quality and find the composition of x of Hg1–xCdxTe epitaxial layers grown by liquid phase epitaxy method. …”
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    Article
  15. 375

    Enabling Robust Exoplanet Atmospheric Retrievals with Gaussian Processes by Yoav Rotman, Luis Welbanks, Michael R. Line, Peter McGill, Michael Radica, Matthew C. Nixon

    Published 2025-01-01
    “…Atmospheric retrievals are essential tools for interpreting exoplanet transmission and eclipse spectra, enabling quantitative constraints on the chemical composition, aerosol properties, and thermal structure of planetary atmospheres. …”
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    Article
  16. 376

    Brake rigging dynamic simulation under braking on a track section with irregularities (the case of a passenger car) by I. A. Yaitskov, V. V. Kosarevskii

    Published 2020-03-01
    “…It was determined that the presence of track irregularities affects the spectral composition of the accelerations. In addition, under the superposition of the bogie-frame pitching and bouncing oscillations, when moving along an uneven track, the rigging block can move up and down the wheel-working surface within a range of up to 50 mm. …”
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    Article
  17. 377

    Growth Stages Discrimination of Multi-Cultivar Navel Oranges Using the Fusion of Near-Infrared Hyperspectral Imaging and Machine Vision with Deep Learning by Chunyan Zhao, Zhong Ren, Yue Li, Jia Zhang, Weinan Shi

    Published 2025-07-01
    “…Based on preprocessed spectra, optimally selected hyperspectral images, and registered RGB images, a dual-branch multi-modal feature fusion convolutional neural network (CNN) model is established. In this model, a spectral branch is designed to extract spectral features reflecting internal compositional variations, while the image branch is utilized to extract external color and texture features from the integration of hyperspectral and RGB images. …”
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  18. 378

    Experimental study on the properties of millimeter-sized NaCl-KCl/MgO ceramic particles for high-temperature solar-thermal phase change applications by Zhu Jingwen, Xu Qiao, Yao Haichen

    Published 2025-01-01
    “…To address these issues, this study proposes a novel method that combines extrusion-spheronization with mixed sintering to produce composite phase change particles with high fluidity, excellent leakage resistance, and high energy storage density. …”
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  19. 379

    Profile of biologically active substances of <i>Aronia mitschurinii</i> leaves growing in the conditions of the Central Black Earth region by O. V. Trineeva, O. V. Pugacheva

    Published 2024-06-01
    “…Quantitative determination of the main groups of biologically active substances was carried out according to known methods using modern physicochemical methods of spectrophotometry and capillary electrophoresis.Results and discussion. …”
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    Article
  20. 380

    Structural, magnetic, and optical characteristics of undoped and chromium, iron, cobalt, copper, and zinc doped nickel oxide nanopowders by Farzaneh Asaldoust, Khosro Mabhouti, Akbar Jafari, Maryam Taleb-Abbasi

    Published 2025-01-01
    “…In this regard, the preparation of pristine NiO and Ni0.95 × 0.05O (X = Cr, Fe, Co, Cu, and Zn) powders was successfully achieved through the co-precipitation method. The X-ray powder diffraction was employed to examine the prepared powders’ phase formation and crystal structure characteristics. …”
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    Article