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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 ...
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 ...
Identification of a novel metastasis enhancer, CDCP1, and analysis of its functions during melanoma metastasis
(Massachusetts Institute of Technology, 2009)
Nearly 90% of cancer mortality from solid tumors is due to metastasis of malignant cells to the distant vital organs. It is now well established that a plethora of stromal cells are present within the tumor, and contribute ...
Structure determination of bacteriophage [phi]21 N-peptide and boxB RNA complex by NMR spectrocsopy
(Massachusetts Institute of Technology, 2001)
The antitermination protein N from [delta] and related E. coli bacteriophage interacts with the nut RNA site and host factors to transform RNA polymerase (RNAP) into a termination resistant transcription complex. The ...