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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 ...
Co-targeting among microRNAs is widespread and enriched in the brain
(Massachusetts Institute of Technology, 2019)
MicroRNAs (miRNAs) play roles in diverse developmental processes and cellular differentiation. Distinct miRNAs have hundreds to thousands of conserved binding sites in mRNAs, but typically exert only modest repression on ...
Development of natural and engineered bacteriophages as antimicrobials
(Massachusetts Institute of Technology, 2018)
One of the major public health concerns of the modern day is the emergence and spread of extensively antibiotic-resistant pathogens. We have already seen the arrival of infections caused by bacteria resistant to all available ...
Rapid nutrient fluctuations and their implications for bacterial growth
(Massachusetts Institute of Technology, 2020)
Bacteria, like all lifeforms, rely on resource acquisition for growth, and the tight coupling between bacterial growth physiology and nutrient availability has long been observed. When nutrient environments shift on ...
Bioenergetics and metabolism of eukaryotic cell proliferation
(Massachusetts Institute of Technology, 2021)
Cellular growth and proliferation necessitates the transformation of cell-external nutrients into biomass. Strategies of biomass accumulation across the kingdoms of life are diverse and range from carbon fixation by ...
Identification and characterization of Toxoplasma gondii effectors that modulate innate immune pathways
(Massachusetts Institute of Technology, 2015)