(n.) Any tree or shrub of the genus Quercus. The oaks have alternate leaves, often variously lobed, and staminate flowers in catkins. The fruit is a smooth nut, called an acorn, which is more or less inclosed in a scaly involucre called the cup or cupule. There are now recognized about three hundred species, of which nearly fifty occur in the United States, the rest in Europe, Asia, and the other parts of North America, a very few barely reaching the northern parts of South America and Africa. Many of the oaks form forest trees of grand proportions and live many centuries. The wood is usually hard and tough, and provided with conspicuous medullary rays, forming the silver grain.
(n.) The strong wood or timber of the oak.
Example Sentences:
(1) The lesson, spelled out by Oak Creek's mayor, Steve Saffidi, was that it shouldn't have taken a tragedy for Sikhs, or anyone else, to find acceptance.
(2) Poison oak, ivy, and sumac dermatitis is a T-cell-mediated reaction against urushiol, the oil found in the leaf of the plants.
(3) By design these plants are adjacent to the AEC's Oak Ridge National Laboratory, and such a location would seem ideal for an experiment on the wedding of nuclear and fossil sources of energy.
(4) The results indicated that the induction phase as well as the maintenance phase did not induce a statistically significant hyposensitivity to urushiol, and we were thus unable to decrease sensitivity to poison ivy and poison oak in humans using orally ingested PDC-HDC diacetate.
(5) The pollen of ash (Fraxinus), oak (Quercus), beech (Fagus) and plane tree (Platanus) was regularly found in high percentages during these years.
(6) The identification of this strain, originally called the Oak Ridge strain, and the establishment of a new species for it were based on morphologic, serologic, and immunochemical studies.
(7) It even had carved oak bears as newel posts on its modest staircase.
(8) At a press conference held outside the temple on Sunday, Oak Creek police chief John Edwards said the "heroic actions" of the two officers "stopped this from being worse than it could have been", noting that many people had gathered for worship at the time of the attack.
(9) It might smell close to pot, he said, but would be “tainted” because of all the other items and plants like poison oak burning along with it.
(10) In previous experiments it was found that birch, beech, alder, hazel and oak are pollens with importance in pathogenesis of early pollinosis in our region of Central Europe.
(11) Changes in IgE to oak, elm, box elder, AgE, and rye grass group I were minimal.
(12) The oak processionary moth, a native of southern and central Europe, has become established in south-west London and parts of the home counties since being found in England in 2006.
(13) It was shown that an increase in the content of 3-OAK-A in the liver during carcinogenesis initiation and progression is accompanied by a decrease in the AA content in this organ.
(14) Leaves collected from the gizzard were identified as coast live oak (Quercus agrifolia).
(15) We contrast two theoretical approaches to social influence, one stressing interpersonal dependence, conceptualized as normative and informational influence (Deutsch & Gerard, 1955), and the other stressing group membership, conceptualized as self-categorization and referent informational influence (Turner, Hogg, Oakes, Reicher & Wetherell, 1987).
(16) Amardeep Singh, of the Sikh Coalition, thanked Oak Creek's citizens for turning out in solidarity.
(17) The ash dieback fungus found in East Anglia last week is just the latest invader to pose a serious threat to UK trees, and government ecologists say that more than 3m larch trees as well as thousands of mature oaks and chestnuts have been felled in the past three years to prevent similar fatal plant diseases from spreading out of control.
(18) Soon he, Oakes and Alan Brien were all sharing an office.
(19) A mystery disease causing Britain's oak trees to "bleed to death" has prompted a £1.1m research effort to identify its cause.
(20) The most active were oak bark, sage and St. John's wort grass WAG extracts, horse radish root and leaf AG extracts, celandine grass WA extract; bur marigold and yarrow grass WA extracts were active towards S. aureus.
Valonia
Definition:
(n.) The acorn cup of two kinds of oak (Quercus macrolepis, and Q. vallonea) found in Eastern Europe. It contains abundance of tannin, and is much used by tanners and dyers.
(n.) A genus of marine green algae, in which the whole frond consists of a single oval or cylindrical cell, often an inch in length.
Example Sentences:
(1) Internally perfused cells of the marine alga Valonia actively transport potassium from external seawater into the cell vacuole.
(2) The implications of these findings in terms of models of ion transport into Valonia are discussed.
(3) It was found that cellulose microfibrils from Valonia ventricosa could act as nuclei for inducing the crystallization of chitosan on cellulose.
(4) This value is close to that measured directly for dielectric breakdown of the membranes of Valonia utricularis (0.85 V, 20 degrees C).
(5) This inhibition of salt uptake by a small hydrostatic pressure suggests that Valonia and other walled cells may regulate their turgor pressures by adjusting their rates of salt uptake.
(6) It was concluded that mature cells of Valonia are significantly different from immature cells in that no highly negative potential cytoplasmic region was found in mature cells.
(7) The cytoplasmic electrical potential and membrane resistance of mature cells of Valonia ventricosa have been measured by inserting a microelectrode concentric with another electrode into the vacuole of the cell.
(8) We have investigated the possible defects in Valonia cellulose microfibrils, which are such that the microfibrils can be broken into elementary fibrils by deformation, but are not sufficient to allow for a small angle maximum corresponding to the elementary fibril dimension.
(9) The possible effect of the illumination-induced transcellular H+-gradient between the central vacuole and the external medium, on both the intensity and the kinetics of delayed fluorescence was studied by measuring both the membrane potentials and H+ fluxes across the plasmatic membranes, and the millisecond component of delayed fluorescence in single cells of the marine alga Valonia ventricosa.
(10) The aim of the present study is to ascertain whether transmembrane temperature gradients couple with transport of electric charge in living cells of Valonia utricularis and eventually measure the thermodynamic coupling coefficient (s).
(11) Voltage relaxation studies in the presence of anaesthetics were performed on cells of the giant marine alga Valonia utricularis using intracellular microelectrodes.
(12) The activities relative to tannic acid (congruent to 100) were as follows: methyl gallate, 195; valonia, 117; wattle, 114; allepo tannic acid, 107; eucalyptus, 105, myrobalan, 98; tara crystals, 76; mangrove, 72; quebracho, 39; gallic acid, and ellagic acid, O.
(13) The electrical properties of the membranes of Valonia utricularis were investigated using intracellular electrodes.
(14) The dielectric breakdown in the membranes of cells of Valonia utricularis was investigated using intracellular electrodes and 500 mu sec current pulses.