Results 261 to 270 of about 1,111,405 (308)

Rhythmic Leaf and Cotyledon Movement Analysis

2022
The first descriptions of circadian rhythms were of the rhythmic leaf movements of plants. Rhythmic leaf movements offer a sensitive, noninvasive, nondestructive, and non-transgenic assay of plant circadian rhythms that can be readily automated, greatly facilitating genetic studies.
Ping, Lou, Kathleen, Greenham, C Robertson, McClung   +2 more
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Leaf wetness sensors - a comparative analysis

2015 9th International Conference on Sensing Technology (ICST), 2015
Leaf wetness duration (LWD) is an important variable in plant disease prediction, which can promote the germination of fungal pathogen spores on leaf surfaces. There are different types of leaf wetness sensors (LWS) to measure LWD with no broadly accepted measurement standard.
A. Ghobakhlou, F. Amir, P. Sallis
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Analysis of Circadian Leaf Movements

2016
The circadian clock is a molecular timekeeper that controls a wide variety of biological processes. In plants, clock outputs range from the molecular level, with rhythmic gene expression and metabolite content, to physiological processes such as stomatal conductance or leaf movements.
Müller, Niels A, Jimenez-Gomez, José
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Automated analysis of leaf venation patterns

2011 IEEE Workshop on Computational Intelligence for Visual Intelligence (CIVI), 2011
Visual imaging methods have been lately extensively used in applications that are targeted to understand and analyze botanical patterns. There is a rich literature on imaging applications in the above field and various techniques have been developed. In this paper, we introduce a fully automated imaging approach for extracting spatial vein pattern data
Jinane Mounsef, Lina J. Karam
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Spectrochemical Analysis of Leaf and Biological Material

Analytical Chemistry, 1953
The role of hydrogen, carbon, nitrogen, oxygen, phosphorus, potassium, calcium, and magnesium as major nutrients, with iron as a secondary element of importance to plant life, has long been recognized. Recent studies have shown that the micro-nutrients, manganese, copper, boron, zinc, and in specific instances molybdenum, vanadium, and aluminum, play a
J. T. Rozsa, J. D. Golland
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Leaf Contamination by Atmospheric Pollutants as Assessed by Elemental Analysis of Leaf Tissue, Leaf Surface Deposit and Soil

Journal of Plant Physiology, 1996
In order to evaluate the influence of air pollutants influx on leaf elemental composition, the concentration of N, S, Cu, Fe and Pb were analyzed in the surface deposit and tissue of Quercus ilex L. leaves from 8 sites of the urban area of Naples. The soil from the trunk base area of Q.
ALFANI A., MAISTO G., IOVIENO P., RUTIGLIANO, Flora Angela, BARTOLI G.   +4 more
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Fractal analysis of leaf shapes

Canadian Journal of Forest Research, 1986
An application of fractal mathematics to the analysis of leaf shapes is presented. Six leaves randomly selected from nine tree species were used in the study. A video imaging method together with microcomputer-based image processing was used to generate leaf outlines.
J. Vlcek, E. Cheung
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The molecular genetic analysis of leaf senescence

Current Opinion in Biotechnology, 1997
The cloning of genes induced during leaf senescence and the study of their modes of regulation conducted in the past two years have revealed some of the molecular mechanisms underlying leaf senescence. The identification of genetic mutants that control leaf senescence in Arabidopsis thaliana opened up new possibilities for genetically analyzing leaf ...
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Extraction of Leaf Parts by Image Analysis

2012
Leaf morphological characters are a useful visual guide for constructing relationships between different plants and between plants and their environment. However, extracting and analysing these characters are carried out manually by botanists, which is a painstaking and time-consuming task.
Olfa Mzoughi, Itheri Yahiaoui, Nozha Boujemaa   +2 more
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Venation Pattern Analysis of Leaf Images

2006
The work investigates pattern recognition methods to detect venation patterns on leaves. An automated technique that involves scale space analysis and an automated technique that includes a combination of edge detectors are compared with a manual technique.
James Clarke, Sarah Barman, Paolo Remagnino, Ken Bailey, Don Kirkup, Simon Mayo, Paul Wilkin   +6 more
openaire   +1 more source