Sentences with phrase «migration model»

«Determining the specific impact of intrinsic colloid formation by radioactive elements can aid in the development of migration models predicting radionuclide transport on a field - scale,» says Prof. Weisbrod.
Other researchers say that this new genome is important because «it is the first paper to document some degree of continuity among the first people to get to Europe and the people living there today,» says population geneticist David Reich of Harvard University, one of the authors on the triple migration model.
In challenging the multiple migration model, the new genome data, published online today in Science, suggest that Europeans today are the descendants of a very old, interconnected population of hunter - gatherers that had already spread throughout Europe and much of central and western Asia by 36,000 years ago.
By examining daily rainfall and weekly vegetation data from satellite images and entering the data into migration models, the researchers were amazed at how well they could predict when zebras started migrating and how fast they migrated.
To date, chemotaxis in mammalian cells has been primarily studied using 2D migration models.
These microsatellite characteristics may thus be representative of the early colonizing cats according to best supported migration model (Fig. 2).
Old school fieldwork is also part of the process: Goebel, for example, is looking forward to excavating sites in Alaska that might challenge or augment the migration models created with genetic data.
Initial research of the acoustic data and development of the migration model was conducted at Princeton with K. Allison Smith (published as K.A.S. Mislan), a postdoctoral research associate in the Program in Atmospheric and Oceanic Sciences, and Charles Stock, a researcher with the Geophysical Fluid Dynamics Laboratory operated by the National Oceanic and Atmospheric Administration.
An alternative model for Toddler signaling, the «migration model», postulates that the primary role of Toddler signaling is to regulate mesendodermal cell migration.
Our results support a modified version of the migration model in which Toddler signaling acts downstream of Nodal signaling to regulate mesodermal cell migration while indirectly regulating endodermal cell migration via Cxcr4a signaling.
Norris and coworkers then tested the «migration model» by loss of the GPCR / chemokine receptor, cxcr4a and suggest that Toddler indirectly affects endoderm migration via Cxcr4 signaling.
The «specification model» postulates that Toddler signaling enhances Nodal signaling to properly specify endoderm, whereas the «migration model» posits that Toddler signaling regulates mesendodermal cell migration downstream of Nodal signaling.
The migration model is based on electronic circuit theory and anticipated patterns of connectivity across various terrains to show how animals will need to travel greater distances to arrive at their ideal climates over the next century.
Caribou energetics, population, and migration modeling.
a b c d e f g h i j k l m n o p q r s t u v w x y z