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Scale closure in upper ocean optical properties : from single particles to ocean color
(Massachusetts Institute of Technology, 2002)
Predictions of chlorophyll concentration from satellite ocean color are an indicator of phytoplankton primary productivity, with implications for foodweb structure, fisheries, and the global carbon cycle. Current models ...
Geobiology of marine magnetotactic bacteria
(Massachusetts Institute of Technology, 2006)
Magnetotactic bacteria (MTB) biomineralize intracellular membrane-bound crystals of magnetite (Fe3O4) or greigite (Fe3S4), and are abundant in the suboxic to anoxic zones of stratified marine environments worldwide. Their ...
Relating behavioral context to acoustic parameters of bottlenose dolphin (Tursiops truncatus) vocalizations
(Massachusetts Institute of Technology, 2001)
This thesis presents methods to analyze the function of vocalizations of the bottlenose dolphin, Tursiops truncatus. The thesis uses the social interaction as the basic unit of analysis, and maintains a deliberate focus ...
The role of denitrification in the nitrogen cycle of New England salt marshes
(Massachusetts Institute of Technology, 2002)
I used direct measurements of nitrogen gas (N₂ fluxes and a ¹⁵N stable isotope tracer to determine the contribution of denitrification to salt marsh sediment N cycling. Denitrification in salt marsh tidal creekbottoms is ...
The aggregation of clay minerals and marine microalgal cells : physicochemical theory and implications for controlling harmful algal blooms
(Massachusetts Institute of Technology, 2001)
In recent years, the use of clay minerals has emerged as one of the most promising strategies for directly controlling harmful algal blooms (HABs). Its principle is based on the mutual aggregation of algal cells and mineral ...
Repulsive axonal pathfinding requires the Ena/VASP family of actin regulatory proteins in vertebrates
(Massachusetts Institute of Technology, 2012)
Vertebrate nervous system development requires the careful interpretation of many attractive and repulsive guidance molecules. For the incredibly complicated wiring diagram comprising the vertebrate nervous system to ...
Mapping the core regulatory circuitry of embryonic stem cells
(Massachusetts Institute of Technology, 2008)
Embryonic stem (ES) cells are of tremendous biological interest because they have the capacity, termed pluripotency, to generate any cell type of the adult organism. Our lab is interested in understanding the genetic ...
Dissecting the transcriptional regulatory network of embryonic stem cells
(Massachusetts Institute of Technology, 2008)
The process by which a single fertilized egg develops into a human being with over 200 cell types, each with a distinct gene expression pattern controlling its cellular state, is poorly understood. An understanding of the ...
Functional characterization and expression of molluscan detoxification enzymes and transporters involved in dietary allelochemical resistance
(Massachusetts Institute of Technology, 2008)
Understanding how organisms deal with potentially toxic or fitness-reducing allelochemicals is important for understanding patterns of predation and herbivory in the marine environment. The ability of marine consumers to ...
Cell cycle regulation during gametogenesis in budding yeast
(Massachusetts Institute of Technology, 2013)
Sexual reproduction depends on meiosis, the specialized cell division that gives rise to gametes. During meiosis, two consecutive rounds of chromosome segregation follow one round of DNA replication to yield four haploid ...