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Full-Text Articles in Biology

A Profile Of Antibiotic Resistant Bacteria In The James River, Keith Allen Boisvert Aug 1997

A Profile Of Antibiotic Resistant Bacteria In The James River, Keith Allen Boisvert

Master's Theses

Spatial and temporal variability in the antibiotic resistance of bacterial assemblages in the lower portion of the James River was examined. The antibiotic resistance of culturable coliforms was compared to the resistance in the microbial community. Antibiotic resistance was determined via colony formation on media containing antibiotics. The antibiotics ampicillin, chloramphenicol, streptomycin and tetracycline were used at concentrations ranging from 10 to 500 ug/ml. Statistically significant differences in the mean number of antibiotic resistant isolates were observed among both sample sites and dates. The sampling site at river mile 99 just below Richmond showed both increased antibiotic resistance and bacterial …


Semipermeable Membrane Devices Are Effective Surrogates Of Fish In Concentrating Polychlorinated Biphenyls, Christopher Gardner Collins May 1997

Semipermeable Membrane Devices Are Effective Surrogates Of Fish In Concentrating Polychlorinated Biphenyls, Christopher Gardner Collins

Master's Theses

This study examined the effectiveness of Semipermeable Membrane Devices (SPMDs) as surrogates for fish in concentrating polychlorinated biphenyls. Golden shiners (Notemigonus crysolucas) and SPMDs were exposed to three different concentrations (0.5, 1.5, and 3.0ppm) of Aroclor 1254 for 1, 3, and 5 days under laboratory conditions. Concentrations of Aroclor 1254 were measured in the SPMDs and fish tissue using extraction techniques and gas chromatography. The concentrations of PCB in SPMDs and N. crysolucas were positively correlated. This relationship compared favorably with data from other studies. The relationship between the concentration of PCB in SPMDs and tissue offish and …


Analysis Of The Inheritance Repression Of A Transposable Element In Drosophila Melanogaster, Melissa Leone Jan 1997

Analysis Of The Inheritance Repression Of A Transposable Element In Drosophila Melanogaster, Melissa Leone

Master's Theses

No abstract provided.


The Soybean Retroelement, Sire-1, Encodes An Envelope-Like Protein-Sire-1 Is An Endogenous, Proretrovirus-Like Genomic Element, Arpita Majumdar Jan 1997

The Soybean Retroelement, Sire-1, Encodes An Envelope-Like Protein-Sire-1 Is An Endogenous, Proretrovirus-Like Genomic Element, Arpita Majumdar

Master's Theses

No abstract provided.


Benthic Invertebrate Community Responses To Round Goby (Neogobius Melanostomus) And Zebra Mussel (Dreissena Polymorpha) Invasion In Southern Lake Michigan, Linda A. Benning Jan 1997

Benthic Invertebrate Community Responses To Round Goby (Neogobius Melanostomus) And Zebra Mussel (Dreissena Polymorpha) Invasion In Southern Lake Michigan, Linda A. Benning

Master's Theses

No abstract provided.


Characterization Of Deletion Sites In A Human Collagen-Like Locus, Marissa A. Michaels Jan 1997

Characterization Of Deletion Sites In A Human Collagen-Like Locus, Marissa A. Michaels

Master's Theses

No abstract provided.


Regulation Of The Activities Of The Three Nitrate Reductase Isoforms In Wild-Type Soybean Glycine Max (L.) Merr. (Variety Williams) By Protein Phosphorylation, Maribel T. Joson Jan 1997

Regulation Of The Activities Of The Three Nitrate Reductase Isoforms In Wild-Type Soybean Glycine Max (L.) Merr. (Variety Williams) By Protein Phosphorylation, Maribel T. Joson

Master's Theses

No abstract provided.


Saccharomyces Cerevisiae-Produced Recombinant Pfs230: A Malaria Transmission-Blocking Vaccine Candidate, Kathryn M. Glynn Jan 1997

Saccharomyces Cerevisiae-Produced Recombinant Pfs230: A Malaria Transmission-Blocking Vaccine Candidate, Kathryn M. Glynn

Master's Theses

No abstract provided.