Author: P. G. Righetti
Publisher: Elsevier Publishing Company
Keywords: methodology, theory, gradients, immobilized
Number of Pages: 398
Published: 1990-02-01
List price: $48.00
ISBN-10: 0444813152
ISBN-13: 9780444813152

Immobilized pH gradients (IPG) represent the most advanced development of isoelectric focusing (IEF). Originally developed to overcome all the problems of IEF in soluble amphoteric buffers (CA) (such as pH gradient instability, complexation with CA chemicals, unreproducibility of pH gradients, protein precipitation at the pI), it turned out to be an entirely new technique, quite different in principle and operation from conventional IEF. The book is thus meant to bring the reader up to date with this fast developing field. The book is divided into six chapters containing information on: de

Author: J.W. Neuberger
Publisher: Springer
Keywords: notes, mathematics, lecture, equations, gradients, differential, sobolev
Number of Pages: 289
Published: 2009-12-01
List price: $59.95
ISBN-10: 3642040403
ISBN-13: 9783642040405

A Sobolev gradient of a real-valued functional on a Hilbert space is a gradient of that functional taken relative to an underlying Sobolev norm. This book shows how descent methods using such gradients allow a unified treatment of a wide variety of problems in differential equations. For discrete versions of partial differential equations, corresponding Sobolev gradients are seen to be vastly more efficient than ordinary gradients. In fact, descent methods with these gradients generally scale linearly with the number of grid points, in sharp contrast with the use of ordinary gradients. Aside f

Authors:George Mulamoottil, Barry G. Warner, Edward A. McBea
Publisher: CRC-Press
Keywords: buffers, boundaries, gradients, environmental, wetlands
Number of Pages: 320
Published: 1996-06-30
List price: $84.95
ISBN-10: 1566701473
ISBN-13: 9781566701471

An understanding of environmental gradients (physical, chemical, hydrological, and biological) is a prerequisite to the accurate delineation of wetland boundaries. Presenting the wide-ranging views of academicians, environmentalists, policy makers, consultants, planners, engineers, hydrologists, biologists, geochemists, ecologists, and conservationists, Wetlands: Environmental Gradients, Boundaries, and Buffers focuses on current topics and research related to wetland delineation; summarizes the main issues of concern; and provides recommendations on research needs.In addition to integrating t

Author: CIBA Foundation Symposium
Publisher: Wiley
Keywords: symposium, oscillations, gradients, waves, calcium
Number of Pages: 302
Published: 1995-06-28
List price: $175.00
ISBN-10: 0471952346
ISBN-13: 9780471952343

Calcium Waves, Gradients and Oscillations Chairman: Michael J. Berridge 1995 Standing free gradients are widespread in living systems and changes in intracellular free Ca2+ concentration, [Ca2+]i, are involved in controlling the responses of cells to many stimuli. Imaging techniques have revealed complex patterns of Ca2+ distribution arising spontaneously or after stimulation of cells by hormones or neurotransmitters. In many cells, Ca2+- mobilizing agonists stimulate oscillations in [Ca2+]i, with the frequency of the concentration rises (‘spikes’) depending on the agonist concentration an