Results 71 to 80 of about 25,590 (247)

Estimation of chemical oxygen demand in different water systems by near-infrared spectroscopy

Ecotoxicology and Environmental Safety, 2022
To monitor environmental water pollution effectively and meet human water needs, it is crucial to develop a fast, simple, and accurate method for monitoring chemical oxygen demand (COD) in various water systems.
Xueqin Han, Danping Xie, Han Song, Jinfang Ma, Yongxin Zhou, Jiaze Chen, Yanyan Yang, Furong Huang   +7 more
doaj   +1 more source

Challenging handheld NIR spectrometers with moisture analysis in plant matrices: Performance of PLSR vs. GPR vs. ANN modelling.

Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, 2020
The global demand for natural products grows rapidly, intensifying the request for the development of high-throughput, fast, non-invasive tools for quality control applicable on-site.
S. Mayr, K. Beć, J. Grabska, Verena Wiedemair, Verena Pürgy, M. Popp, G. Bonn, C. Huck   +7 more
semanticscholar   +1 more source

Managing Spectral Intensity Variations With In‐Line Fiber‐Optic High‐Volume Noncontact Raman Probes: A Strategy Exploration

Journal of Raman Spectroscopy, EarlyView.
Robust quantification in noncontact Raman sensing requires dedicated correction of working distance dependent background effects, while laser power variations are readily stabilized using internal reference signals. Chemically relevant Raman intensity can be preserved for bulk composition measurements, under variable laser power and working distance ...
Tiril Aurora Lintvedt, Petter Vejle Andersen, Jens Petter Wold, Nils Kristian Afseth   +3 more
wiley   +1 more source

The response of water balance components to land cover change based on hydrologic modeling and partial least squares regression (PLSR) analysis in the Upper Awash Basin

, 2019
Study region Upper Awash basin at the headwater of Awash River. Study focus Comprehensive assessment of land cover (LC) change effect on the water balance components using integrated approaches of hydrologic modeling and partial least squares regression (
Alemayehu A. Shawul, Sumedha Chakma, A. Melesse   +2 more
semanticscholar   +1 more source

Seeing herbaria in a new light: leaf reflectance spectroscopy unlocks trait and classification modeling in plant biodiversity collections

New Phytologist, EarlyView.
Summary Reflectance spectroscopy is a rapid method for estimating traits and discriminating species. Spectral libraries from herbarium specimens represent an untapped resource for generating broad phenomic datasets across space, time, and taxa. We conducted a proof‐of‐concept study using trait data and spectra from herbarium specimens up to 179 yr old,
Dawson M. White, Jeannine Cavender‐Bares, Charles C. Davis, J. Antonio Guzmán Q., Shan Kothari, Jorge M. Robles, José Eduardo Meireles   +6 more
wiley   +1 more source

Increasing occurrence of cold and warm extremes during the recent global warming slowdown. [PDF]

, 2018
The recent levelling of global mean temperatures after the late 1990s, the so-called global warming hiatus or slowdown, ignited a surge of scientific interest into natural global mean surface temperature variability, observed temperature biases, and ...
Johnson, Nathaniel C, Kosaka, Yu, Li, Xichen, Xie, Shang-Ping   +3 more
core   +2 more sources

Comparison Study of Partial Least Squares Regression Analysis and Principal Component Analysis in Fast-Scan Cyclic Voltammetry

International Journal of Electrochemical Science, 2019
Both principal component regression (PCR) and partial least squares regression (PLSR) have been commonly used to predict neurochemical concentrations from measurements of fast-scan cyclic voltammetry (FSCV).
Jaekyung Kim, Yoonbae Oh, Cheonho Park, Yu Min Kang, Hojin Shin, In Young Kim, Dong Pyo Jang   +6 more
doaj   +1 more source

Ecological and genomic variation in ectomycorrhizal fungal exploration types

New Phytologist, EarlyView.
Summary Ectomycorrhizal fungi (EMF) produce mycelia with variable extension and complexity, which can be classified according to soil ‘exploration types’ (ETs). ETs have received attention as one of the few mycorrhizal trait frameworks, but without an empirical classification of ET functional diversity and environmental preferences, understanding and ...
Thomas M. Mansfield, Artin Zarsav, Filipa Cox, Laura M. Suz, Martin I. Bidartondo, Sietse van der Linde, Nadia Barsoum, Colin Averill, Alan Kuo, Leho Tedersoo, Pasi Rautio, Arthur Gessler, Bruno De Vos, Luc Croisé, Henning Meesenburg, Markus Wagner, Frank Jacob, Paweł Lech, Anna Kowalska, Martin Greve, Genoveva Popova, Beat Frey, Marcus Schaub, Marco Ferretti, Peter Waldner, Vicent Calatayud, Roberto Canullo, Giancarlo Papitto, Aleksander Marinšek, Lars Vesterdal, Morten Ingerslev, Helge Meissner, Volkmar Timmermann, Nadine Eickenscheidt, Andreas Schmitz, Francis M. Martin, Joseph Spatafora, Peter G. Kennedy, Annegret Kohler, Jonathan M. Plett, Ian C. Anderson, Sara Branco, Igor V. Grigoriev, Chris J. Pires, Sarah A. Unruh, Lawrence W. Zettler, Otto Miettinen, Ilya Viner, Tom W. May, Teresa Lebel, David E. A. Catcheside, Pamela S. Catcheside, Helen P. Vonow, Leigh A. Burgoyne, Julia Haska, Mark A. Anthony   +55 more
wiley   +1 more source

Two-step paretial least square regression classifiers in brain-state decoding using functional magnetic resonance imaging.

PLoS ONE, 2019
Multivariate analysis methods have been widely applied to decode brain states from functional magnetic resonance imaging (fMRI) data. Among various multivariate analysis methods, partial least squares regression (PLSR) is often used to select relevant ...
Zhiying Long, Yubao Wang, Xuanping Liu, Li Yao   +3 more
doaj   +1 more source

Climate change and crop resilience: harnessing metabolomics for predicting stress tolerance

New Phytologist, EarlyView.
Summarised methodology for metabolite biomarker discovery and genomic targets selection for those metabolites to predict high‐throughput phenotypic and agronomic traits of interest for direct uptake in breeding programmes. Summary Global warming is driving climate change to levels not experienced since the advent of agriculture, primarily due to ...
Agyeya Pratap, Arash Fazeli, Ali Bandehagh, Nicolas L. Taylor   +3 more
wiley   +1 more source