Now showing items 11-20 of 5686
Geochemical proxies of North American freshwater routing during the Younger Dryas cold event
The Younger Dryas cold interval represents a time when much of the Northern Hemisphere cooled from ~12.9 to 11.5 kiloyears before present. The cause of this event, which has long been viewed as the canonical example of ...
Cytochrome P450 induced differentially in endothelial cells cultured from different organs of Anguilla rostrata
Endothelial cells are a structural barrier and an active regulator of many bodily processes. CYP1A activity is induced in the endothelium of teleosts and mammals exposed to lipophilic xenobiotics, such as polycyclic ...
Dispersal delays, predator–prey stability, and the paradox of enrichment
It takes time for individuals to move from place to place. This travel time can be incorporated into metapopulation models via a delay in the interpatch migration term. Such a term has been shown to stabilize the positive ...
A revised evolutionary history of the CYP1A subfamily : gene duplication, gene conversion, and positive selection
Members of cytochrome P450 subfamily 1A (CYP1As) are involved in detoxification and bioactivation of common environmental pollutants. Understanding the functional evolution of these genes is essential to predicting and ...
Essays in philosophical biology
Philosophical biology, one might venture to assert, is an effort to delve as deeply as possible into the underpinnings of biological structure. Consequently the effort will be, first, to understand how continuity can be ...
The biology and philosophy of adaptation
A logico-linguistic analysis is presented first, in which the symbolization of being adapted, having an adaptation, and having adaptedness is explained. Next the linguistic-realistic divide is portrayed. This is explained ...
The application of set theory to ecology
Sets and membership are part of the structure of the world. Sets and membership hold nature together.
Oceanography : plankton in a warmer world
Satellite data show that phytoplankton biomass and growth generally decline as the oceans’ surface waters warm up. Is this trend, seen over the past decade, a harbinger of the future for marine ecosystems?
Natural selection, microevolution and macroevolution
The use of logical validity and empirical data will show that natural selection occurs at the micro-evolutionary level but does not occur at the macro-evolutionary level.
Evolution of the Southwest Indian Ridge from 55°45′E to 62°E : changes in plate-boundary geometry since 26 Ma
(American Geophysical Union, 2007-06-23)
From 55°45′E to 58°45′E and from 60°30′E to 62°00′E, the ultraslow-spreading Southwest Indian Ridge (SWIR) consists of magmatic spreading segments separated by oblique amagmatic spreading segments, transform faults, and ...