Results 171 to 180 of about 1,282,075 (189)

Optical characterization of plant leaves

International Summer Session: Lasers and Their Applications, 2011
Non invasive measurements avoid physical-chemical interference with, entrance to, or reaction with the analyte, intervening with its normal behavior. Optical remote monitoring of biological tissues, as plant leaves, allows a non invasive measurement because there is no physical contact between the sensor and the leaf, resulting in no interference with ...
Carlos Villaseñor-Mora, Irineo Torres-Pacheco, Rene de Jesus Romero-Troncoso, Martin Olmos-Lopez, Ramón G. Guevara-González, Jose A. Padilla-Medina, Roque Alfredo Osornio-Rios, Alejandro Espinosa-Calderon   +7 more
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Real-time rendering of plant leaves

ACM SIGGRAPH 2006 Courses on - SIGGRAPH '06, 2005
This paper presents a framework for the real-time rendering of plant leaves with global illumination effects. Realistic rendering of leaves requires a sophisticated appearance model and accurate lighting computation. For leaf appearance we introduce a parametric model that describes leaves in terms of spatially-variant BRDFs and BTDFs.
Julie Dorsey, Xu Yang, Baining Guo, Heung-Yeung Shum, Wenle Wang, Lifeng Wang   +5 more
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Radiative transfer in plant leaves

Optics and Spectroscopy, 2001
A two-layer model of light scattering and absorption in plant phytoelements is considered, which takes into account absorption of light by pigments and water and light scattering by particles of two types: chloroplasts and air cavities. An elementary light scattering event is described using the Mie theory.
R. D. Mukhamedyarov, V. V. Berdnik
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INSECT ANTIFEEDING SUBSTANCES IN PLANT LEAVES [PDF]

Pure and Applied Chemistry, 1975
Abstract
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Effects of Gravity on Transpiration of Plant Leaves

Annals of the New York Academy of Sciences, 2009
To clarify effects of gravity on the water vapor exchange between plants and the ambient air, we evaluated the transpiration rate of plant leaves at 0.01, 1.0, and 2.0 g for 20 s each during parabolic airplane flights. The transpiration rates of a strawberry leaf and a replica leaf made of wet cloth were determined using a chamber method with humidity ...
Hiroaki Hirai, Yoshiaki Kitaya
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Atmospheric Ammonia: Absorption by Plant Leaves

Science, 1972
By monitoring the disappearance of ammonia from an airstream flowing through a small growth chamber containing a single plant seedling, it was discovered that plant leaves absorb significant quantities of ammonia from the air, even at naturally occurring low atmospheric concentrations.
R. J. Millington, G. L. Hutchinson, D. B. Peters   +2 more
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Fluorescence emission spectra of plant leaves and plant constituents

Radiation and Environmental Biophysics, 1991
The UV-B radiation (e.g. 337 nm) induced blue fluorescence (BF) and red chlorophyll fluorescence spectra (RF) of green leaves from plants with different leaf structure were determined and the possible nature and candidates of the blue fluorescence emission investigated.
Lang, Michael, Stober, Fred, Lichtenthaler, Hartmut K.   +2 more
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Superexpression of tuberculosis antigens in plant leaves

Tuberculosis, 2007
Recent developments in genetic engineering allow the employment of plants as factories for 1/foreign protein production. Thus, tuberculosis (TB) ESAT6 antigen was expressed in different plant systems, but the level of vaccine protein accumulation was extremely low. We describe the technology for superexpression of TB vaccine proteins (Ag85B, ESAT6, and
Olga Y. Frolova, Yuri L. Dorokhov, Peter Ivanov, Anna Sheveleva, Joseph Atabekov, Tatjana V. Komarova, Anna S. Zvereva   +6 more
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Organogenesis in plants: initiation and elaboration of leaves

Trends in Genetics, 2015
Plant organs initiate from meristems and grow into diverse forms. After initiation, organs enter a morphological phase where they develop their shape, followed by differentiation into mature tissue. Investigations into these processes have revealed numerous factors necessary for proper development, including transcription factors such as the KNOTTED ...
Aaron Sluis, Sarah Hake
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Metabolism of sedoheptulose-C14 in plant leaves

Archives of Biochemistry and Biophysics, 1954
Abstract 1. 1. Sedoheptulose-C14 in leaves in the light and in air is rapidly converted to sucrose. In similar experiments in the dark the sedoheptulose is metabolized to respiratory products such as glutamic, aspartic, and succinic acids. 2. 2.
L.P. Zill, N. E. Tolbert
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