Results 241 to 250 of about 596,386 (281)

Computing roots of matrix products

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2001
AbstractThe problem of computing a kth root of a matrix product W = Πki=1 Ai is considered. The explicit computation of W may produce a highly inaccurate result due to rounding errors, such that the computed root W1/k is far from the actual root W1/k. An algorithm for computing the square root of W is presented which avoids the explicit computation of ...
Benner, P. ; https://orcid.org/0000-0003-3362-4103, Faßbender, H.   +1 more
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Fine root production of astringent phenolics

Oecologia, 1989
Chemical quality of fine roots (
Muller, Robert N., Kalisz, Paul J., Luken, James O.   +2 more
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The Root of Platelet Production

Science, 2007
Megakaryocytes are caught in the act of shedding platelets into blood vessels, settling a debate on how this process occurs.
Amy E. Geddis, Kenneth Kaushansky
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Roots and Wreath Products

Mathematical Proceedings of the Cambridge Philosophical Society, 1960
B. H. Neumann (5) has shown, by using free products with an amalgamated subgroup, that every group can be embedded in a divisible group. This theorem can also be proved, in an entirely different way, by making use of the wreath product (Baumslag(1)). In view of this connexion between roots in groups and the wreath product, a study is made here of the ...
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Ethylene Controls Root Meristem Production

Science's STKE, 2007
In plants, undifferentiated meristem tissue provides stem cells to produce roots and shoots. The root meristem contains a few of these stem cells in a region called the quiescent center. Ortega-Martínez et al .
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Grass roots productivity: productivity managed by the productive.

Radiology management, 1986
Can there be a radiology productivity system that enlists the eager support of technologists and is endorsed by management? Can there be a productivity system that involves 10-15 minutes of time per day to manage and produces meaningful results? Can there be a productivity system that is run by employees?
S, Suskin, N, Gagnon
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Fine Root Production and Demography

1999
Abstract Attributes of root systems appear to have resulted from pressures on plants to maximize the efficiency of soil resource acquisition and to cminimize the risk of injury or death at environmental or competitive extremes (Yanai et al. 1994).
Timothy J Fahey, Caroline S Bledsoe, Frank P Day, Roger W Ruess, Alvin J M Smucker   +4 more
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Large-Scale Production of Hairy Root

2004
Many products of interest are synthesized in organized tissues, but not formed in suspension or callus culture. Therefore, most attention has been focused on root cultures. The transgenic plant,"hairy root", has brought us to dramatic improvements in growth rate and high content of desirable products.
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Acid protease production in fungal root endophytes

Mycologia, 2015
Fungal endophytes are ubiquitous in healthy root tissue, but little is known about their ecosystem functions, including their ability to utilize organic nutrient sources such as proteins. Root-associated fungi may secrete proteases to access the carbon and mineral nutrients within proteins in the soil or in the cells of their plant host.
Michael S, Mayerhofer, Erica, Fraser, Gavin, Kernaghan   +2 more
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Hyperforin production in Hypericum perforatum root cultures

Journal of Biotechnology, 2016
Extracts of the medicinal plant Hypericum perforatum are used to treat depression and skin irritation. A major API is hyperforin, characterized by sensitivity to light, oxygen and temperature. Total synthesis of hyperforin is challenging and its content in field-grown plants is variable.
Mariam, Gaid, Paul, Haas, Till, Beuerle, Stephan, Scholl, Ludger, Beerhues   +4 more
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