Results 221 to 230 of about 419,145 (267)

Developmental plasticity of the hypoxic ventilatory response

Respiration Physiology, 1997
This paper will describe recent studies concerning the existence of developmental plasticity in the hypoxic ventilatory control system and the locus of the functional impairment following perinatal sensory suppression. Suppression of peripheral arterial chemoreceptor activity was achieved by exposing rats to hyperoxia (60% O2) for the first month of ...
L, Ling, E B, Olson, E H, Vidruk, G S, Mitchell   +3 more
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A quinidine-responsive plastic membrane electrode

Journal of Pharmaceutical and Biomedical Analysis, 1985
A membrane electrode based on quinidine tetraphenylborate in a PVC matrix is described. The electrode exhibits a rapid and near-Nernstian response in the range 3.5 x 10(-5)-1 x 10(-2) M quinidine sulphate at pH 6-8. In an acidic medium the electrode responds to diprotonated quinidine. In sodium tetraphenylboron (Na TPB) solutions the response is linear
V V, Cosofret, R P, Buck
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Social Responsibility and Plastic

2023
Abstract Plastic seems to be getting a universally bad press at the moment with the current opinion being that plastic is incompatible with sustainability. In this chapter the nature of plastic or sustainability and of social responsibility are examined and redefined. The conclusion is that it is not plastic which is irresponsible but
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Plasticity in ploidy: a generalized response to stress

Trends in Plant Science, 2015
Endoreduplication, the replication of the genome without mitosis, leads to an increase in the cellular ploidy of an organism over its lifetime, a condition termed 'endopolyploidy'. Endopolyploidy is thought to play significant roles in physiology and development through cellular, metabolic, and genetic effects.
Daniel R, Scholes, Ken N, Paige
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Plastics and Social Responsibility

2020
Plastics are now the most widely used materials group in the world. Global production of plastics has increased twentyfold since the 1960s, reaching 360 million tonnes in 2018. By 2050, these figures are expected to quadruple. This chapter specifies the scale of production and its environmental consequences, as in increasing ocean litter. The extent to
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Nonlinear Dielectric Response of Plastic Crystals

2018
This article summarizes ongoing experimental efforts on nonlinear dielectric spectroscopy on plastic crystals. In plastic crystals, the relevant dipolar orientational degrees of freedom are fixed on a crystalline lattice with perfect translational symmetry.
Lunkenheimer, Peter, Michl, Marion, Loidl, Alois   +2 more
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Glial responses to synaptic damage and plasticity

Journal of Neuroscience Research, 1999
We review three principally different forms of injury-induced synaptic alterations. (1) Displacement of presynaptic terminals from perikarya and dendrites of axotomized neurons, (2) central changes in primary afferent terminals of peripherally axotomized sensory ganglion cells, and (3) anterograde Wallerian-type degeneration following interruption of ...
H, Aldskogius, L, Liu, M, Svensson
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Plastic Surgery Response in Natural Disasters

Journal of Craniofacial Surgery, 2015
Disasters cause untold damage and are often unpredictable; however, with proper preparation, these events can be better managed. The initial response has the greatest impact on the overall success of the relief effort. A well-trained multidisciplinary network of providers is necessary to ensure coordinated care for the victims of these mass casualty ...
Susan, Chung, Amanda, Zimmerman, Andres, Gaviria, Deniz, Dayicioglu   +3 more
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Plastic responses to spinal cord injury

Behavioural Brain Research, 2008
The commonly accepted view of a highly rigid, hardwired central nervous system has evolved considerably over the past few decades. The adult central nervous system is now known to be capable of significant functional reorganization, frequently referred to as plasticity, in order to adapt to a changing environment or to a change in the CNS hardware ...
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Plasticity and overcompensation in grass responses to herbivory

Oecologia, 1993
Several hypotheses predict defoliation-induced increases in individual plant fitness. In this paper we examine three such hypotheses: the Herbivore Optimization Hypothesis (HOH); the Continuum of Responses Hypothesis (CRH); and the Growth Rate Model (GRM).
Richard D, Alward, Anthony, Joern
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