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Botany of the wheat plant - E.J.M. Kirby The uppermost node on which roots occur, at the base of the culm, may be above soil level, and the roots may not penetrate the soil but appear as short pegs protruding from the stem. At each node, a root arises from one of four quadrants, which may be designated X (the quadrant centred on the midrib of the leaf attached at that node) Y, A and B. In the deeper regions of the soil, the anatomy of the nodal roots is similar to that of a seminal root. www.fao.org /docrep/006/y4011e/y4011e05.htm   (7988 words)

Search Results for "node" node, in astronomy, point at which the orbit of a body crosses a reference plane. ...Inflected forms: pl. nodes of Ranvier A constriction in the myelin sheath, occurring at varying intervals along the length of a nerve fiber. ...Botany The point on a stem where a leaf is attached or has been attached; a joint. www.bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=&query=node   (272 words)

fUSION Anomaly. Nodes This nOde last updated May 7th, 2003 and is permanently morphing... In the grand network we are now assembling, the size of the nodes is collapsing while the quantity and quality of the connections are exploding. The nodes around us—the nodes that we are—are not passive switches, but grow in strength and insight through their range of materials, the nature and novelty of their connections and mutual exchanges. fusionanomaly.net /nodes.html   (595 words)

Sugarcane Botany: A Brief View The node is where the leaf attaches to the stalk and where the buds and root primordia are found. The buds, located in the root band of the node, are embryonic shoots consisting of a miniature stalk with small leaves (Figure 2). Sugarcane botany is similar to other grasses, with the major exception that the harvested economic product is sucrose stored in the stalk rather than grain or fodder. edis.ifas.ufl.edu /SC034   (2896 words)

Britain.tv Wikipedia - Node Node (networking), a device connected to a network, such as a computer or router Node (computer science), a basic unit used to build data structures, such as linked lists and tree data structures Node (circuits), a region in an electrical circuit where there is no change in potential www.britain.tv /wikipedia.php?title=Node   (199 words)

node - Definitions from Dictionary.com a protuberance in the tissue of a plant; an excrescence on a stem, branch, or root; a node or joint in a stem, esp. when of swollen form. Anatomy A small mass or lump of body tissue that either occurs naturally, as in the case of lymph nodes, or is a result of disease. Either of the two points at which the orbit of an artificial satellite intersects the equatorial plane of the planet it is orbiting. dictionary.reference.com /browse/node   (1494 words)

AZ Master Gardener Manual: Plant Parts and Functions Nodes are areas of great cellular activity and growth, where auxiliary buds develop into leaves or flowers. The eyes of a potato are actually the nodes on the stem. In addition, some plants such as the dahlia and the sweet potato produce an underground storage organ called a tuberous root, which is often confused with bulbs and tubers. ag.arizona.edu /pubs/garden/mg/botany/plantparts.html   (1677 words)

YourArt.com >> Encyclopedia >> node   (Site not responding. Last check: 2007-11-07) Node (botany), the place on a plant stem where a leaf is attached Node (physics), a spatial locus along a standing wave where the wave has minimal amplitude Orbital node, one of two points where a body's orbit crosses the ecliptic, called the ascending node and descending node www.yourart.com /research/encyclopedia.cgi?subject=/node   (182 words)

node - Definitions at Dicts.info (botany) the small swelling that is the part of a plant stem from which one or more leaves emerge The ascending and descending nodes refer respetively to the points where the planet moves from S to N and N to S. The respective symbols are ☊ and ☋. The joint of a stem, or the part where a leaf or several leaves are inserted. dicts.info /define.php?word=node   (638 words)

botany/passiflora They are inserted under a bell jar or in a propagating case in a greenhouse and are shaded from direct sunlight. A shoot that can easily be bent down to touch the soil is prepared by making an inch long cut lengthwise through a node and extending almost to the center of the stem. The cut should be made in a place where the stem is firm, usually a foot or more from the tip of the shoot. www.botany.com /passiflora.html   (1208 words)

[No title]   (Site not responding. Last check: 2007-11-07) The balance factor of a node is the height of its right subtree minus the height of its left subtree. In an AVL tree, the height of a node's right subtree minus the height of its left subtree is called the node's balance factor (see balance factor). In its worst case (that is, the AVL tree in which every node has subtrees that differ in height by one), the number of nodes in the entire tree, and within each subtree that comprises the entire tree, is close to a Fibonacci number. www.lycos.com /info/avl-tree.html   (612 words)

[No title] The Node Explorer is a portable media player with interactive presentations that include guided tours, images, maps, videos and sound clips. A node is a device that is connected as part of a computer network. Node (botany), the place on a plant stem where a leaf is attached; Node (physics), www.howstuffworks.com /search2.php?pg=&server=www.howstuffworks.com&terms=node   (512 words)

ArcNews Summer 2004 Issue -- g.net Architecture Used for National Bird Map Service Registry These highly recognized geographic agencies planned the framework for the node to facilitate rapid access to North American bird population and habitat data, which is maintained by a broad coalition of federal, state, and nongovernmental partners in conservation. Node Web site visitors access the data to study birds, access maps, and use data to create new maps, which aid in planning and evaluation of activities involving birds. The node continues to grow by linking to more and more North American bird data sets and information that are maintained and managed by the node's partners. www.esri.com /news/arcnews/summer04articles/gnet-architecture.html   (710 words)

The Citizen Scientist Random networks are networks where the number of nodes is fixed and each node connects to other nodes with a fixed probability, P. It was found that after a certain value of P the random graphs would become connected (which involves a study called percolation theory which I will not go into here). They termed these networks "scale-free," since the distribution of node degrees looks the same no matter at which scale you look at it (as is the case with power laws in general). Scale-free networks are in general stable when certain nodes and their corresponding edges "disappear." This means that if a given random node disappears, the average distance between nodes will likely not change. www.sas.org /tcs/weeklyIssues_2005/2005-07-01/feature3   (2193 words)

Botany: Species   (Site not responding. Last check: 2007-11-07) The glossary is composed of three sections: (i) a general glossary, (ii) a glossary of terms pertinent primarily to cell biology and molecular genetics, (iii) a glossary of crop scientific nomenclature. Economic Botany is the study of plants as they relate to human use. On the UCLA campus, Professor Arthur C. Gibson has since 1984 taught a course on economic botany, entitled "Plants and Civilization." You are invited to read these "fun" essays on plants, to thereby appreciate roles that plants played in the history of civilization and perform in our society today. www.nbii.gov /disciplines/botany/appliedsci.html   (2348 words)

American Journal of Botany, 1, 9, November, 1914   (Site not responding. Last check: 2007-11-07) There is an intimate connection between the type of nodal anatomy (one, three or many traces and gaps) and the occurrence of stipules and similar structures in dicotyledons. In the majority of plants with a trilacunar node stipules are present; in almost all with a unilacunar node they are absent, and in all with a multilacunar node the leaf has a sheathing base. Stipules, sheaths, ligules and similar modifications of the base of the petiole are dependent in position and character on the anatomy of the node, and seem thus to be essentially homologous. www.botany.org /ajb/00029122_di001126.php   (729 words)

NBII Invasive Species Information Node (ISIN) - Contacts She also coordinates the invasive species efforts of the NBII regional and thematic nodes or working groups. Botany and Geomorphology), came to the National Biological Information Infrastructure (NBII) in December 2003 after working as a Naturalist at the Occoquan Bay National Wildlife Refuge, Environmental Education Centerm, Fort Belvoir, Virginia. She completed her undergraduate studies in Tropical Botany and Geomorphology at James Cook University of North Queensland, Australia in 1995 and studied the invasive 'woody weed' - Zizyphus mauritiana for Honours in 1996. invasivespecies.nbii.gov /contacts.html   (459 words)

Ceramium: Morphology At each of the nodes, additional cells are created, called periaxial cells. In some species, these cortical cells extend all the way up and down to the next node, fully covering the plant with cortex. In other species, the cortex may only be located directly around each of the nodes. www.mbari.org /staff/conn/botany/reds/Ceramium/morphology.htm   (383 words)

Freid, Ethan.   (Site not responding. Last check: 2007-11-07) Department of Botany, Miami University, Oxford, OH 45056. - Stem, node, petiole, and leaf anatomy of Coccolobeae (Polygonaceae) and its systematic implications. Stem, node, petiole, and leaf anatomy of Antigonon, Brunnichia, Coccoloba, Muehlenbeckia, and Podopterus was investigated. www.ou.edu /cas/botany-micro/botany2000/section13/abstracts/113.shtml   (193 words)

Botany 307F - Families of Vascular Plants - Reproductive characters Angiosperm flowers are interpreted as modified shoots, consisting of an axis and appendages that may be sterile (perianth) or fertile (stamens, pistils). Recall that a whorled arrangement of leaves involves three or more leaves attached at the same node on a stem. Floral appendages are thought of as making up as many as four whorls of appendages, attached to a compressed axis, the receptacle. www.botany.utoronto.ca /courses/BOT307/B_How/307b1rep.html   (689 words)

[No title] Between them are representations of the nodes that are immediately descended from that node, separated by commas. In the above tree, the immediate descendants are B, another interior node, and D. The other interior node is represented by a pair of parentheses, enclosing representations of its immediate descendants, A, C, and E. In our example these happen to be tips, but in general they could... The code creates a node, inserts it into the tree model, and then, if appropriate, requests that the nodes above it be expanded and the tree scrolled so that the new node is visible. www.lycos.com /info/tree--nodes.html   (500 words)

botany/buddleia Greenhouse: Cuttings of young shoots, 3 to 4 inches long, are taken as soon as the plants are through flowering. They are cut off just below a joint or node with a sharp knife. Remove their lower leaves and place them in a propagating case filled with sand or vermiculite. www.botany.com /buddleia.html   (1060 words)

Thank you, Mr. Ducker: This lad knows nodes | csmonitor.com I have long been rather pleased that I know what a node is. Whenever the opportunity arises, I try to use the word. In fact, my own history vis-à-vis nodes only goes to illustrate that nodes are acquired rather than innate, learned rather than inherited. Walter Ducker first showed me a node, but he felt no need to label it for me. This cheerful, friendly, round-faced Yorkshireman stripped the leaves off a small plant stem, and showed me the point at which those leaves had joined the stalk. www.csmonitor.com /2004/0219/p18s02-hfes.htm   (899 words)

Botany online: Features of Flowering Plants - Leaves If two leaves spring from one node, they are without exception opposite. The leaves of the node above (and that beneath) form a right angle with those of the middle node. Rosettes are usually sitting near the soil; at the basis of the shoot follows node after node with almost complete reduction of the internodes. www.biologie.uni-hamburg.de /b-online/e02/02c.htm   (950 words)

Botany: Home Page   (Site not responding. Last check: 2007-11-07) And for the human species, plants bring aesthetic pleasure, delighting the senses with their beauty and variety. Botany is one of the oldest branches of biology. It is concerned with the scientific study of plants and other similar organisms. www.nbii.gov /disciplines/botany   (205 words)

Leaves, Botany Course, Master Gardener Training, Extension Service, Oregon State University A leaf's venation (Figure 13), blade and margin shapes (Figures 14 and 15) and apex and base shapes (Figure 16) can be important identifying characteristics. Rosulate leaves are arranged in a rosette around a stem with extremely short nodes. The leaf blade is the principal edible part of several horticultural crops, including chives, collards, dandelions, endives, kale, leaf lettuce, mustard, parsley, spinach, Swiss chard, and other greens. extension.oregonstate.edu /mg/botany/leaves3.html   (219 words)

Heart The mass of tissue is called the sino-atrial node, S-A node or pacemaker. A similar mass of neuromuscular tissue, the atrio-ventricular node, or A-V node, is situated in the wall between the left and right atria. From this node a bundle of cardiac muscle, called the bundle of His, extends into the septum between the two ventricles where it forms two branches, one leading to the wall of the right ventricle and the other continuing in the wall of the left ventricle. www.botany.uwc.ac.za /SCI_ED/grade10/manphys/heart.htm   (1710 words)

Garden Botany -- Plant Classification Each additional node (B, C, and D) represents the hypothetical ancestor for each group above (B is the hypothetical ancestor for Ginkgophyta, Pinophyta, Gnetophyta, and Magnoliophyta; C is the hypothetical ancestor of Pinophyta, Gnetophyta, and Magnoliophyta; and D is the hypothetical ancestor of Gnetophyta and Magnoliophyta). Between each node some evolutionary change has occurred represented by a synapomorphy. For example, between B and C (step 2) the means of fertilization changed; it no longer was necessary for the sperm to swim to the egg and so the sperm lost its flagella. www.bbg.org /gar2/topics/botany/class_phylogeny.html   (493 words)

AZ Master Gardener Manual: Leaves The base of the petiole is attached to the stem at the node. The small angle formed between the petiole and the stem is called the leaf axil. Rosulate arrangement is one in which the basal leaves form a rosette around the stem with extremely short nodes. ag.arizona.edu /pubs/garden/mg/botany/leaves.html   (1412 words)

Comparative anatomical analysis of the cotyledonary region in three Mediterranean Basin Quercus (Fagaceae) -- Pascual ... Transverse section close to the cotyledonary node showing two adventitious cotyledonary buds originating from the cotyledonary tissue. The anatomy of the cotyledonary node is similar for Q. Botany, August 1, 2002; 89(8): 1189 - 1196. www.amjbot.org /cgi/content/full/89/3/383   (4072 words)

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