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Leaf mines: their effect on leaf longevity
Oecologia, 1984The effects of a number of factors, notably leaf mining insects, on the longevity of beech and holm oak leaves have been studied. The regular monitoring of individually labelled leaves was complemented by analysis of leaf fall data. Both methods confirm that these mining insects have only a slight impact on their host trees.
I M, Pritchard, R, James
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Leaf‐Critical and Leaf‐Stable Graphs
Journal of Graph Theory, 2016AbstractThe minimum leaf number ml(G) of a connected graph G is defined as the minimum number of leaves of the spanning trees of G if G is not hamiltonian and 1 if G is hamiltonian. We study nonhamiltonian graphs with the property for each or for each . These graphs will be called ‐leaf‐critical and l‐leaf‐stable, respectively.
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Annual Review of Plant Biology, 2006
Leaves are extraordinarily variable in form, longevity, venation architecture, and capacity for photosynthetic gas exchange. Much of this diversity is linked with water transport capacity. The pathways through the leaf constitute a substantial (≥30%) part of the resistance to water flow through plants, and thus influence rates of ...
Lawren, Sack, N Michele, Holbrook
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Leaves are extraordinarily variable in form, longevity, venation architecture, and capacity for photosynthetic gas exchange. Much of this diversity is linked with water transport capacity. The pathways through the leaf constitute a substantial (≥30%) part of the resistance to water flow through plants, and thus influence rates of ...
Lawren, Sack, N Michele, Holbrook
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Annual Review of Plant Biology, 2007
Leaf senescence constitutes the final stage of leaf development and is critical for plants’ fitness as nutrient relocation from leaves to reproducing seeds is achieved through this process. Leaf senescence involves a coordinated action at the cellular, tissue, organ, and organism levels under the control of a highly regulated genetic program.
Lim, PO, Kim, HJ, Nam, HG
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Leaf senescence constitutes the final stage of leaf development and is critical for plants’ fitness as nutrient relocation from leaves to reproducing seeds is achieved through this process. Leaf senescence involves a coordinated action at the cellular, tissue, organ, and organism levels under the control of a highly regulated genetic program.
Lim, PO, Kim, HJ, Nam, HG
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Accounts of Chemical Research, 2012
To convert the energy of sunlight into chemical energy, the leaf splits water via the photosynthetic process to produce molecular oxygen and hydrogen, which is in a form of separated protons and electrons. The primary steps of natural photosynthesis involve the absorption of sunlight and its conversion into spatially separated electron-hole pairs.
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To convert the energy of sunlight into chemical energy, the leaf splits water via the photosynthetic process to produce molecular oxygen and hydrogen, which is in a form of separated protons and electrons. The primary steps of natural photosynthesis involve the absorption of sunlight and its conversion into spatially separated electron-hole pairs.
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Leaf fall as a source of leaf miner mortality
Oecologia, 1984Leaf miner deaths resulting from the death of their leaves were assessd by collecting falling leaves of holm oak and beech. The Phyllonorycter mines thus captured were examined to ascertain the cause of death. For both mining species the mortality from leaf shedding accounted for less than 2.8% of the mining cohorts.
I M, Pritchard, R, James
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Scientific American, 2010
The article discusses research investigating the development of artificial leaves that act like natural leaves. Plants produce their own natural energy through photosynthesis, which is a process that converts sunlight, air, and water into fuel, without producing harmful emissions. An overview of artificial leaves that can similarly convert sunlight and
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The article discusses research investigating the development of artificial leaves that act like natural leaves. Plants produce their own natural energy through photosynthesis, which is a process that converts sunlight, air, and water into fuel, without producing harmful emissions. An overview of artificial leaves that can similarly convert sunlight and
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Continuous leaf optimization for IMRT leaf sequencing
Medical Physics, 2016PurposeConventional step‐and‐shoot intensity modulated radiation therapy leaf sequencing methods, where a nonhomogeneous fluence map is converted to a set of apertures and associated intensities, assume that target fluence is stratified into a fixed number of discrete levels and/or aperture leaf positions are restricted to a discrete set of locations ...
Troy, Long +3 more
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