Results 281 to 290 of about 1,060,632 (346)

Radical‐Mediated, Substrate‐Independent Fabrication of Hybrid Solid–Hydrogel Materials With Tunable Crosslinking: An Initiator‐ and Crosslinker‐Free Approach

Advanced Science, EarlyView.
This work introduces a substrate‐independent, reagent‐free plasma strategy that forms radical‐rich interlayers for covalent hydrogel attachment without initiators or crosslinkers. The long‐lived radicals drive in situ gelation, creating robust, cytocompatible hybrid solid–hydrogel constructs across diverse substrates.
Ghazal Shineh, Azin Khodaei, Pardis Keikhosravani, Masoud Zhianmanesh, Yiyun Xia, Aaron Gilmour, Sina Naficy, Andrea Guzina, Daniella Bianchi, Khoon S. Lim, Fariba Dehghani, Saber Amin Yavari, Marcela Bilek, Giselle C. Yeo, Behnam Akhavan   +14 more
wiley   +1 more source

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Assessment of red-edge vegetation indices for crop leaf area index estimation

Remote Sensing of Environment, 2019
This study explores the potential of vegetation indices (VIs) for crop leaf area index (LAI) estimation, with a focus on comparing red-edge reflectance based (RE-based) and the visible reflectance based (VIS-based) VIs.
T. Dong, Jiangui Liu, J. Shang, B. Qian, B. Ma, J. Kovacs, D. Walters, X. Jiao, X. Geng, Yichao Shi   +9 more
semanticscholar   +3 more sources

Red-Edge Band Vegetation Indices for Leaf Area Index Estimation From Sentinel-2/MSI Imagery

IEEE Transactions on Geoscience and Remote Sensing, 2020
The estimation of leaf area index (LAI) from optical remotely sensed data based on vegetation indices (VIs) is a quick and practical approach to acquire LAI over vast areas.
Yuanheng Sun, Q. Qin, H. Ren, Tianyuan Zhang, Shanshan Chen   +4 more
semanticscholar   +1 more source

Leaf Area Index and Specific Leaf Area Determinations

Journal of Agronomic Education, 1972
ABSTRACTLeaf area is measured by several methods and area per unit leaf weight (specific leaf area) is calculated. Leaf area index is then calculated as the product of leaf yield and specific leaf area. Procedures and equipment needed are described.
D. D. Wolf, E. W. Carson, R. H. Brown
openaire   +1 more source

An assessment study of three indirect methods for estimating leaf area density and leaf area index of individual trees

, 2020
Field measurements of leaf area density (LAD) and leaf area index (LAI) for individual trees have increased in importance and relevance with the advent of high spatial resolution remote sensing for the urban landscape.
Shanshan Wei, T. Yin, M. Dissegna, A. Whittle, G. Ow, Mohamed Lokman Mohd Yusof, N. Lauret, J. Gastellu‐Etchegorry   +7 more
semanticscholar   +1 more source

Radiometric leaf area index

International Journal of Remote Sensing, 1988
Abstract The geometrical structure of a vegetation canopy determines the amount of foliage presented to a sensor and the form of the relationship between reflectance and vegetation amount. The aim of this study was to develop a practical measure of vegetation amount that was sensitive to canopy geometry.
P. J. CURRAN, N. W. WARDLEY
openaire   +1 more source

Estimating crop biomass using leaf area index derived from Landsat 8 and Sentinel-2 data

, 2020
The availability of Landsat 8 and Sentinel-2 has led to a steady increase in both temporal and spatial resolution of satellite data, offering new opportunities for large-scale crop condition monitoring and crop yield mapping.
T. Dong, Jiangui Liu, B. Qian, Liming He, Jane Liu, Rong Wang, Qi Jing, C. Champagne, H. Mcnairn, J. Powers, Yichao Shi, Jing M. Chen, J. Shang   +12 more
semanticscholar   +1 more source

Leaf Area Index

2013
This chapter briefly introduces the inversion algorithms used, discusses the product characteristics and validation results, and presents preliminary analyses and applications. The inversion algorithm was developed to estimate LAI from time-series remote sensing data using general regression neural networks (GRNNs).
Shunlin Liang, Xiaotong Zhang, Zhiqiang Xiao, Jie Cheng, Qiang Liu, Xiang Zhao   +5 more
openaire   +1 more source

Critical Leaf Area Index in Pigeonpea

Journal of Agronomy and Crop Science, 1987
AbstractExperiment conducted with six pigeonpea cultivars over three seasons revealed that the critical leaf area index was 5.3 which coincided with the maximum crop growth rate and optimum net assimilation rate. It was also evident that the crop growth rate was influenced more by NAR rather than LAI. This study also suggests that by maintaining higher
K. Balakrishnan, N. Natarajaratnam, C. Rajendran   +2 more
openaire   +1 more source

Relationship between tillering and leaf area index: quantifying critical leaf area index for tillering in rice

The Journal of Agricultural Science, 2002
A field study was conducted at the International Rice Research Institute (IRRI), Philippines during the dry seasons of 1997 and 1998 under irrigated conditions. The objectives of this study were to quantify the critical leaf area index (LAIc) at which tillering stops based on the relationship between tillering rate and LAI, and to determine the effect ...
X. ZHONG, S. PENG, J. E. SHEEHY, R. M. VISPERAS, H. LIU   +4 more
openaire   +1 more source