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Detailed Reconstruction (detailed + reconstruction)

Distribution by Scientific Domains

Humanities and Social Sciences	50%

Selected Abstracts

Reconstructing impairment of secretory ameloblast function in porcine teeth by analysis of morphological alterations in dental enamel

JOURNAL OF ANATOMY, Issue 1 2006
Carsten Witzel
Abstract We studied the relationship between the macroscopic appearance of hypoplastic defects in the dental enamel of wild boar and domestic pigs, and microstructural enamel changes, at both the light and the scanning electron microscopic levels. Deviations from normal enamel microstructure were used to reconstruct the functional and related morphological changes of the secretory ameloblasts caused by the action of stress factors during amelogenesis. The deduced reaction pattern of the secretory ameloblasts can be grouped in a sequence of increasingly severe impairments of cell function. The reactions ranged from a slight enhancement of the periodicity of enamel matrix secretion, over a temporary reduction in the amount of secreted enamel matrix, with reduction of the distal portion of the Tomes' process, to either a temporary or a definite cessation of matrix formation. The results demonstrate that analysis of structural changes in dental enamel allows a detailed reconstruction of the reaction of secretory ameloblasts to stress events, enabling an assessment of duration and intensity of these events. Analysing the deviations from normal enamel microstructure provides a deeper insight into the cellular changes underlying the formation of hypoplastic enamel defects than can be achieved by mere inspection of tooth surface characteristics alone. [source]

From the Good Will to the Formula of Universal Law,

PHILOSOPHY AND PHENOMENOLOGICAL RESEARCH, Issue 3 2004
SAMUEL C. RICKLESS
In the First Section of the Groundwork, Kant argues that a good-willed person "under subjective limitations and hindrances" is required "never to act except in such a way that [she] could also will that [her] maxim should become a universal law." Call this argument "K". Although recent commentators (including Barbara Herman, Christine Korsgaard, Nelson Potter, and Allen Wood) have done much to clarify and defend many of the important claims Kant makes in the First Section, they have accurately identified neither K's premises nor the reasoning by means of which K's conclusion is derived. The result of this is that K's strengths are underappreciated. My aim is to rectify this state of affairs, by providing a detailed reconstruction of K, and thereby bring out the various ways in which the argument deserves our recognition and praise. [source]

Radbruch and Hart on the Grudge Informer: A Reconsideration

RATIO JURIS, Issue 2 2002
Thomas Mertens
Hart's defense of the separation of law and morality is partly based on his refusal to accept Radbruch's solution of the well-known grudge informer case, in his famous article "Statutory Injustice and Suprastatutory Law." In this paper, I present a detailed reconstruction of the "debate" between Radbruch and Hart on this case. I reach the conclusion that Hart fails to address the issue that was Radbruch's primary concern, namely the legal position of the judiciary when dealing with criminal statutes. I suggest that Hart's separation thesis cannot be upheld in the face of this concern. In my argument, Hart's mistaken understanding of the verdict of the Oberlandesgericht Bamberg that he refers to plays a crucial role. [source]

Multi-component stable isotope records from Late Weichselian and early Holocene lake sediments at Imio,ki, Poland: palaeoclimatic and methodological implications,

JOURNAL OF QUATERNARY SCIENCE, Issue 8 2009
Karina Apolinarska
Abstract Late Weichselian and early Holocene climatic and environmental changes are inferred from stable carbon and oxygen isotope records obtained on bulk and biogenic carbonates from the sediment sequence of Lake Lednica, western Poland. Along with sediment and pollen stratigraphic data, a wide range of carbonate components occurring in the sediments was analysed for ,13C and ,18O, including shells of several gastropod species and the bivalve genus Pisidium, carapaces of the ostracod subfamily Candoninae and oogonia of the aquatic macrophyte genus Chara. The development of catchment soils and the onset of authigenic carbonate production in response to the climatic amelioration during the Late Weichselian are clearly reflected by rising carbonate content, distinct isotopic shifts in bulk carbonates and decreasing ,13C values of bulk organic matter in the sediments. The GI-1/GS-1 (the Bølling,Allerød Interstadial complex/Younger Dryas Stadial) and the GS-1/Preboreal transitions are marked by significant shifts in ,18O values of 2,3,, as well as by distinct changes in carbonate content, indicative of a decrease and a subsequent increase in mean annual temperature. Corresponding ,13C records reflect primarily changes in aquatic productivity, with favourable conditions for phytoplankton and macrophytes during GI-1 and the Preboreal resulting in persistent 13C enrichment. The Younger Dryas Stadial is characterised by depletions in 13C and 18O, with indications of a climatic tripartition. Consistent offsets in ,13C and ,18O between records obtained on specific carbonate components reflect vital effects in combination with seasonal characteristics and habitat preferences of the respective carbonate-precipitating biota. Largely parallel first-order variations in ,13C and ,18O of the different carbonate components demonstrate that individual isotope records may provide important palaeoclimatic information, although more detailed reconstructions can be obtained from multi-component analysis. Copyright © 2009 John Wiley & Sons, Ltd. [source]