jealousy
发表于 2025-3-26 22:13:41
Preservation of Biogenic Carbon Isotopic Signals in Plio-Pleistocene Bone and Tooth Mineral,ly small differences existed between mean values for modern browsers and their fossil counterparts. The small difference increased with age; hence it was interpreted solely in terms of diagenesis. However, re-examination of the data suggests that the modern values used as references could themselves
Nostalgia
发表于 2025-3-27 02:58:28
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Canopy
发表于 2025-3-27 06:47:07
Quantifying Histological and Chemical Preservation in Archaeological Bone,ework, comprised primarily of collagen. Such a relationship may provide a criterion for sample selection prior to chemical analysis. This proposed relationship was explored using a study sample comprised of nine human femoral cross-sections from a sandy lake shore, site of the Snake Hill military ce
是剥皮
发表于 2025-3-27 12:23:11
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Nutrient
发表于 2025-3-27 16:42:10
Modeling Protein Diagenesis in Ancient Bone: Towards a Validation of Stable Isotope Data,e compared with degraded protein from archaeological human bone. Protein identification was done by gel electrophoresis and amino acid analyses, whereby non-proteinogenetic amino acids were especially monitored. We present a model for microbial collagen break-down and the resulting consequences for
忘恩负义的人
发表于 2025-3-27 18:52:50
Some Biochemical Aspects of Carbon Isotopic Paleodiet Studies,human populations. We discuss the possible roles of some biochemical phenomena in determining the partitioning of isotopically labeled nutrients in these tissues. Respiration converts all nutrient-derived carbon into . which is irreversibly fractionated with respect to bicarbonate at the time of for
阴谋小团体
发表于 2025-3-27 21:55:14
,“Consider a Spherical Cow ⋯” — on Modeling and Diet, and its diet. The main approach taken is to express this relationship as an explicit equation, or a “DIFF”, and then to show how the values of such a DIFF can be evaluated from published experimental data. These values can be expected to have a much wider meaning than a simple encapsulation of a pa
阴谋小团体
发表于 2025-3-28 05:59:53
Controlled Diet and Climate Experiments on Nitrogen Isotope Ratios of Rats,ome field studies observe a greater difference in . between trophic levels in dry, hot habitats than in wet, cool ones. Two hypotheses have been proposed to explain this variation in difference in . between trophic levels. (1) Elevated excretion of .N-depleted urea in heat/water-stressed animals; (2
VICT
发表于 2025-3-28 07:55:39
Labelled quantified modal logics,n the 19. century. Stable isotopes of carbon were analyzed in preserved bone collagen and in foods. Foods were prepared following recipes in historical documents and using traditional cookware. Raw ingredients and finished baked goods and stew were analyzed. Results indicate small differences in . b
gene-therapy
发表于 2025-3-28 11:50:54
Manfred Kerber,Michael Kohlhasesite, as well as on modern animals from the region. The average . value for Preclassic human bone collagen was . (n=28) and for tooth enamel apatite it was . (n=33); the average . in bone collagen was . (n=23). The archaeological faunal remains, in order of frequency, include white-tailed deer, fres