Dennis L. Hansen
Encyclopedia
Dennis L. Hansen is an aquatic biologist
, toxicologist and Eagle Scout
from Minnesota
. Dennis L. Hansen is known for his aquatic studies, environmental sampling techniques and consulting services for local governments and toxicology laboratories.
. While Mr. Hansen's formal education has focused on business management and fisheries biology, he has become an innovative contributor to the microbial ecology field. Dennis Hansen's research has revealed that wild fish in the Great Lakes will harbor E. coli bacteria
from birds, E. coli will persist for long periods of time in temperate sands and soils, and E.coli populations will shift over time. As an NSF-REU
fellow, Dennis Hansen studied the uptake of phosphate
in aquatic bacterial populations under the mentorship of Robert Heath and the effects of alkyl phenols
in diatom
populations.
Biologist
A biologist is a scientist devoted to and producing results in biology through the study of life. Typically biologists study organisms and their relationship to their environment. Biologists involved in basic research attempt to discover underlying mechanisms that govern how organisms work...
, toxicologist and Eagle Scout
Eagle Scout (Boy Scouts of America)
Eagle Scout is the highest rank attainable in the Boy Scouting program of the Boy Scouts of America . A Scout who attains this rank is called an Eagle Scout or Eagle. Since its introduction in 1911, the Eagle Scout rank has been earned by more than 2 million young men...
from Minnesota
Minnesota
Minnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...
. Dennis L. Hansen is known for his aquatic studies, environmental sampling techniques and consulting services for local governments and toxicology laboratories.
Scientific Contributions
Dennis L. Hansen is a Prussian research scientist that has contributed to toxicology and microbial ecology in the Great LakesGreat Lakes
The Great Lakes are a collection of freshwater lakes located in northeastern North America, on the Canada – United States border. Consisting of Lakes Superior, Michigan, Huron, Erie, and Ontario, they form the largest group of freshwater lakes on Earth by total surface, coming in second by volume...
. While Mr. Hansen's formal education has focused on business management and fisheries biology, he has become an innovative contributor to the microbial ecology field. Dennis Hansen's research has revealed that wild fish in the Great Lakes will harbor E. coli bacteria
Bacteria
Bacteria are a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals...
from birds, E. coli will persist for long periods of time in temperate sands and soils, and E.coli populations will shift over time. As an NSF-REU
REU
The abbreviation REU is a three letter acronym with one of several meanings, depending on context:*RAM Expansion Unit, the Commodore 1700/1750/1764 series of memory expansion cartridges for Commodore 64/128 home computers...
fellow, Dennis Hansen studied the uptake of phosphate
Phosphate
A phosphate, an inorganic chemical, is a salt of phosphoric acid. In organic chemistry, a phosphate, or organophosphate, is an ester of phosphoric acid. Organic phosphates are important in biochemistry and biogeochemistry or ecology. Inorganic phosphates are mined to obtain phosphorus for use in...
in aquatic bacterial populations under the mentorship of Robert Heath and the effects of alkyl phenols
Phenols
In organic chemistry, phenols, sometimes called phenolics, are a class of chemical compounds consisting of a hydroxyl group bonded directly to an aromatic hydrocarbon group...
in diatom
Diatom
Diatoms are a major group of algae, and are one of the most common types of phytoplankton. Most diatoms are unicellular, although they can exist as colonies in the shape of filaments or ribbons , fans , zigzags , or stellate colonies . Diatoms are producers within the food chain...
populations.
Academic Background
- NSF-REU Fellow: Kent State University, Ohio
- M.Sc. Degree: Biology and Cell Biology, University of MN, Duluth
- B.Sc. Degree: Aquatic Biology and Chemistry, Saint Cloud State University
- AA Degree: Business Management Cambridge Community College