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Physical Sciences and Mathematics Commons™

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Life Sciences

University of Windsor

2016

Articles 61 - 77 of 77

Full-Text Articles in Physical Sciences and Mathematics

Great Lakes Focus On Water Quality: Vol.2 Iss.4, Uwindsor Administrator Apr 2016

Great Lakes Focus On Water Quality: Vol.2 Iss.4, Uwindsor Administrator

Focus on International Joint Commission Activities

If you live near either Lake Superior or Lake Huron, chances are there is a copy of the Up- per Lakes Reference Group’s Final Report within a few miles of your home. Copies of Volume l, the summary document, have been sent to all the libraries listed at the end of this article. When they are printed, early in the spring, copies of the 1200-page Volumes ii and ill, containing details about Lake Superior and Lake Huron, will be sent to many of the same libraries.

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Great Lakes Focus On Water Quality: Vol.2 Iss.3, Uwindsor Administrator Apr 2016

Great Lakes Focus On Water Quality: Vol.2 Iss.3, Uwindsor Administrator

Focus on International Joint Commission Activities

On July 21, in Windsor, the Great Lakes Water Quality Board presented its Fourth Annual Report to the International Joint Commission. Recommendations to the HO include the adoption of specific water quality objectives for a number of pesticides, persistent toxic sub- stances, metals and some physical characteristics.

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Great Lakes Focus On Water Quality: Vol.2 Iss.2, Uwindsor Administrator Apr 2016

Great Lakes Focus On Water Quality: Vol.2 Iss.2, Uwindsor Administrator

Focus on International Joint Commission Activities

The I.J.C. will hear the presentations of the four major institutions reporting to it under the Water Quality Agreement from July 19-22 in Windsor, Ontario. This four-day event marks the first time that the Commission has opened such a meeting to the media and general public. The meetings will be held at the Cleary Auditorium and Convention Centre.

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Great Lakes Focus On Water Quality: Vol.2 Iss.1, Uwindsor Administrator Apr 2016

Great Lakes Focus On Water Quality: Vol.2 Iss.1, Uwindsor Administrator

Focus on International Joint Commission Activities

In Chicago, Illinois, November 19-21, the Environmental Protection Agency, in cooperation with the United States Department of Agriculture, Council on Environmental Quality, Department of Health, Education and Welfare and the Department of the interior, sponsored a symposium on polychlorinated biphenyls (PCB’s). Over 600 scientists, politicians, industrialists and environmentalists attended. What led the agencies to sponsor the conference and why so many people attended should become clear to you as you read through this article.

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Great Lakes Focus On Water Quality: Vol.1 Iss.4, Uwindsor Administrator Apr 2016

Great Lakes Focus On Water Quality: Vol.1 Iss.4, Uwindsor Administrator

Focus on International Joint Commission Activities

The Great Lakes Water Quality Board presented its Third Annual Report to the Com- mission July 30, 1975. Members provided the Commission with an assessment of water quality of the lakes and connecting channels and a review of the municipal, industrial and other remedial programs being implemented to achieve the objectives of the 1972 United States/Canada Great Lakes Water Quality Agreement. In addition, the Board presented new and revised specific water quality objectives and a basin-wide surveillance pro- gram for the Commission‘s consideration.

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Great Lakes Focus On Water Quality: Vol.1 Iss.3, Uwindsor Administrator Apr 2016

Great Lakes Focus On Water Quality: Vol.1 Iss.3, Uwindsor Administrator

Focus on International Joint Commission Activities

The Upper Lakes Reference Group represents a unique approach in water quality studies -— the characterization of two large bodies of fresh water which are for the most part not degraded. The studies are directed more toward protection than rehabilitation; toward action, not reaction.

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Great Lakes Focus On Water Quality: Vol.1 Iss.2, Uwindsor Administrator Apr 2016

Great Lakes Focus On Water Quality: Vol.1 Iss.2, Uwindsor Administrator

Focus on International Joint Commission Activities

The International Joint Commission, through the Great Lakes Water Quality Board, established the International Reference Group on Great Lakes Pollution from Land Use Activities (PLUARG) to study and report the effects of land uses on water quality. Task C of PLUARG’s study includes intense investigations of six major watersheds in Canada and the United States which are representative of the full range of urban and rural land uses found in the Great Lakes Basin

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Great Lakes Focus On Water Quality: Vol.1 Iss.1, Uwindsor Administrator Apr 2016

Great Lakes Focus On Water Quality: Vol.1 Iss.1, Uwindsor Administrator

Focus on International Joint Commission Activities

It was inevitable that out of the environmental movement there would emerge one case above all others — one classic situation which would contain all of the constituents which any environmental case could have within itself — complex problems of pollution, economics, politics, and law. This is the case of Reserve Mining Company and its discharge of 67,000 tons a day of taconite tailings into Lake Superior

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Focus On Great Lakes Water Quality: (Issn 0711-0855) Vol. 10 Iss. 2, Uwindsor Administrator Apr 2016

Focus On Great Lakes Water Quality: (Issn 0711-0855) Vol. 10 Iss. 2, Uwindsor Administrator

Focus on International Joint Commission Activities

The work of this Commission is important. They have a charge and responsibility and their work is not in vain," affirmed Madame Jeanne Sauvé, the Governor General of Canada, as she spoke to the audience gathered at the International Joint Commission (lJC) Great Lakes Water Quality meeting held at Queen’s University, Kingston, Ontario, June 24-27, 1985.

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Focus On Great Lakes Water Quality: (Issn 0711-0855) : Vol. 10 Iss. 1, Uwindsor Administrator Apr 2016

Focus On Great Lakes Water Quality: (Issn 0711-0855) : Vol. 10 Iss. 1, Uwindsor Administrator

Focus on International Joint Commission Activities

The International Joint Commission will hold its 1985 Great Lakes Water Quality Meeting June 24-27, 1985 on the campus of Queen‘s University in Kingston, Ontario. Located on the northeast shore of Lake Ontario, it is renowned for its history, freshwater sailing and other recreational facilities.

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Assessment Of Hazard Metrics For Predicting Field Benthic Invertebrate Toxicity In The Detroit River, Ontario, Canada, Kerry N. Mcphedren, Alice Grigicak-Mannnion, Gord Paterson, Briggs Tedd, Jan J.H. Ciborowski, G. Douglass Haffner, Ken G. Drouillard Mar 2016

Assessment Of Hazard Metrics For Predicting Field Benthic Invertebrate Toxicity In The Detroit River, Ontario, Canada, Kerry N. Mcphedren, Alice Grigicak-Mannnion, Gord Paterson, Briggs Tedd, Jan J.H. Ciborowski, G. Douglass Haffner, Ken G. Drouillard

Great Lakes Institute for Environmental Research Publications

Numerical sediment quality guidelines (SQGs) are frequently used to interpret site specific sediment chemistry and predict potential toxicity to benthic communities. These SQGs are useful for a screening line of evidence (LOE) that can be combined with other LOEs in a full weight of evidence (WOE) assessment of impacted sites. Three common multi-chemical hazard quotient methods (PEC-Qavg, PEC-Qmet and PEC-Qsum) and a novel (Hazard Score; HZD) approach were used in conjunction with a consensus based set of SQGs to evaluate the ability of different scoring metrics to predict the biological effects of sediment contamination under …

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Is It Appropriate To Composite Fish Samples For Mercury Trend Monitoring And Consumption Advisories?, Ken G. Drouillard, Nilima Gandhi, Satyendra P. Bhavsar, Sarah B. Gewurtz, George B. Arhonditsis, Steve Petro Jan 2016

Is It Appropriate To Composite Fish Samples For Mercury Trend Monitoring And Consumption Advisories?, Ken G. Drouillard, Nilima Gandhi, Satyendra P. Bhavsar, Sarah B. Gewurtz, George B. Arhonditsis, Steve Petro

Great Lakes Institute for Environmental Research Publications

Monitoring mercury levels in fish can be costly because variation by space, time, and fish type/size needs to be captured. Here, we explored if compositing fish samples to decrease analytical costs would reduce the effectiveness of the monitoring objectives. Six compositing methods were evaluated by applying them to an existing extensive dataset and examining their performance in reproducing the fish consumption advisories and temporal trends. The methods resulted in varying amount (average 34-72%) of reductions in samples, but all (except one) reproduced advisories very well (96-97% of the advisories did not change or were one category more restrictive compared to …

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A Chemoenzymatic Route To Chiral Siloxanes, Ravi Naoum, Jacqueline P. Séguin, John F. Trant, Mark B. Frampton, Tomáš Hudlický, Paul M. Zelisko Jan 2016

A Chemoenzymatic Route To Chiral Siloxanes, Ravi Naoum, Jacqueline P. Séguin, John F. Trant, Mark B. Frampton, Tomáš Hudlický, Paul M. Zelisko

Chemistry and Biochemistry Publications

An approach employing two enzymes—toluene dioxygenase and immobilized lipase B from Candida antarctica (N435)—was explored as a potential biocatalytic method for the coupling of chiral diols with siloxane species. Analysis of reaction mixtures using1H NMR spectroscopy suggested that up to 66% consumption of the siloxane starting materials had occurred. Oligomeric species were observed and chiral products from the coupling of a cyclic diol with a siloxane molecule were isolated and characterized by MALDI-ToF MS and GPC. Immobilized lipases from Rhizomucor miehei and Thermomyces lanuginosus were also explored as potential catalysts for the coupling reactions, however, their use only returned starting …

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Lipid Bilayer Thickness Determines Cholesterols Location In Model Membranes, Drew Marquardt, Frederick A. Heberle, Denise V. Greathouse, Roger E. Koeppe, Robert F. Standaert, Brad J. Van Oosten, Thad A. Harroun, Jacob J. Kinnun, Justin A. Williams, Stephen R. Wassall, John Katsaras Jan 2016

Lipid Bilayer Thickness Determines Cholesterols Location In Model Membranes, Drew Marquardt, Frederick A. Heberle, Denise V. Greathouse, Roger E. Koeppe, Robert F. Standaert, Brad J. Van Oosten, Thad A. Harroun, Jacob J. Kinnun, Justin A. Williams, Stephen R. Wassall, John Katsaras

Chemistry and Biochemistry Publications

Cholesterol is an essential biomolecule of animal cell membranes, and an important precursor for the biosynthesis of certain hormones and vitamins. It is also thought to play a key role in cell signaling processes associated with functional plasma membrane microdomains (domains enriched in cholesterol), commonly referred to as rafts. In all of these diverse biological phenomena, the transverse location of cholesterol in the membrane is almost certainly an important structural feature. Using a combination of neutron scattering and solid-state2H NMR, we have determined the location and orientation of cholesterol in phosphatidylcholine (PC) model membranes having fatty acids of different lengths …

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Fullfact: An R Package For The Analysis Of Genetic And Maternal Variance Components From Full Factorial Mating Designs, Aimee Lee S. Houde, Trevor E. Pitcher Jan 2016

Fullfact: An R Package For The Analysis Of Genetic And Maternal Variance Components From Full Factorial Mating Designs, Aimee Lee S. Houde, Trevor E. Pitcher

Great Lakes Institute for Environmental Research Publications

Full factorial breeding designs are useful for quantifying the amount of additive genetic, nonadditive genetic, and maternal variance that explain phenotypic traits. Such variance estimates are important for examining evolutionary potential. Traditionally, full factorial mating designs have been analyzed using a two-way analysis of variance, which may produce negative variance values and is not suited for unbalanced designs. Mixed-effects models do not produce negative variance values and are suited for unbalanced designs. However, extracting the variance components, calculating significance values, and estimating confidence intervals and/or power values for the components are not straightforward using traditional analytic methods. We introduce fullfact …

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Quantitative Biomonitoring In The Detroit River Using Elliptio Complanata: Verification Of Steady State Correction Factors And Temporal Trends Of Pcbs In Water Between 1998-2015, Ken G. Drouillard, Mark Cook, Todd A. Leadley, Paul Drca, Ted Briggs, G Douglas Haffner Jan 2016

Quantitative Biomonitoring In The Detroit River Using Elliptio Complanata: Verification Of Steady State Correction Factors And Temporal Trends Of Pcbs In Water Between 1998-2015, Ken G. Drouillard, Mark Cook, Todd A. Leadley, Paul Drca, Ted Briggs, G Douglas Haffner

Great Lakes Institute for Environmental Research Publications

Quantitative biomonitoring methods were applied to determine PCB concentrations in water from the Detroit River over a 17 year period. During 2014, mussels were deployed for and extended duration (21-364 d) and time dependent PCB concentrations were fit to a bioaccumulation model to estimate elimination coefficients (ktot) and provide site specific calibration of mussel toxicokinetics. The site specific calibration and different ktot versus KOW relationships from the literature were used to correct for steady state. ∑PCB concentrations in water were not significantly dependent on the ktot values used indicating that individual variation exceeds error contributed …

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Determination Of Pcb Elimination Coefficients In Round Goby And Tubenose Goby, Xin Sun, Tim B. Johnson, Ken G. Drouillard Jan 2016

Determination Of Pcb Elimination Coefficients In Round Goby And Tubenose Goby, Xin Sun, Tim B. Johnson, Ken G. Drouillard

Great Lakes Institute for Environmental Research Publications

Whole-body elimination coefficients of polychlorinated biphenyls (PCBs) were determined in two Great Lakes invasive fish species, round goby (Neogobius melanostomus) and tubenose goby (Proterorhinus semilunaris). Elimination rates were determined for a set of model PCB congeners (n=12 congeners) dosed to fish by intraperitoneal injection and allowed to depurate at a temperature of 21.4oC for 90 d. Eight PCBs (PCB 6, 13, 21, 57, 62, 68, 89, 112 and 125) exhibited significant elimination by round goby and had corresponding half lives ranging from 13 to 39.8 d. For tubenose goby, four congeners (PCBs 21, 58, …

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