منابع مشابه
Morphological aspects of self-repair of lesions caused by internal growth stresses in stems of Aristolochia macrophylla and Aristolochia ringens.
This study reveals in detail the mechanism of self-repair during secondary growth in the vines Aristolochia macrophylla and Aristolochia ringens based on morphological data. For a comprehensive understanding of the underlying mechanisms during the self-repair of lesions in the sclerenchymatous cylinder of the stem, which are caused by internal growth stresses, a classification of morphological ...
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To determine effects of stem nitrogen concentration ([N]) on the seasonal course of respiration, rates of stem respiration of ten control and ten irrigated-fertilized (IL), 30-year-old Norway spruce trees (Picea abies (L.) Karst.), growing in northern Sweden, were measured on seven occasions from June 1993 to April 1994. To explore sources of seasonal variation and mechanisms of fertilization e...
متن کاملClosure for Spanning Trees with k-Ended Stems
Let T be a tree. The set of leaves of T is denoted by ( ) Leaf T . The subtree ( ) Leaf T T − of T is called the stem of T . A stem is called a k-ended stem if it has at most k-leaves in it. In this paper, we prove the following theorem. Let G be a connected graph and 2 k ≥ be an integer. Let u and v be a pair of nonadjacent vertices in G . Suppose that ( ) ( ) 1 G G N u N v G k ≥ − − . Then ...
متن کاملSpanning trees whose stems have at most k leaves
Let T be a tree. A vertex of T with degree one is called a leaf, and the set of leaves of T is denoted by Leaf(T ). The subtree T − Leaf(T ) of T is called the stem of T and denoted by Stem(T ). A spanning tree with specified stem was first considered in [3]. A tree whose maximum degree at most k is called a k-tree. Similarly, a stem whose maximum degree at most k in it is called a k-stem, and ...
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1 Vincent Center for Reproductive Biology, MGH Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, Massachusetts, United States of America, 2 Department of Obstetrics, Gynecology and Reproductive Biology, Harvard Medical School, Boston, Massachusetts, United States of America, 3 Institute of Cell Biology and Centre for Integrative Physiology, University of E...
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ژورنال
عنوان ژورنال: Journal of the Society of Materials Science, Japan
سال: 1963
ISSN: 1880-7488,0514-5163
DOI: 10.2472/jsms.12.709