Magnetic Susceptibility of the Surface Tills of Southern Ontario

1974 ◽  
Vol 11 (5) ◽  
pp. 658-663 ◽  
Author(s):  
C. P. Gravenor ◽  
M. Stupavsky
Keyword(s):  
Magnetic Susceptibility ◽  
Metamorphic Rock ◽  
Mineral Content ◽  
Source Area ◽  
Lake Ontario ◽  
Lake Huron ◽  
East Side ◽  
Southern Ontario ◽  
The Mean ◽  
Area North

The tills of southwestern Ontario derived their igneous and metamorphic rock and mineral content from areas of the Canadian Shield north of Lake Ontario and north and northeast of Lake Huron. The magnetic susceptibility (MS) of samples of till taken from the area north of Lake Ontario is significantly higher than that for samples taken from the area north and northeast of Lake Huron.The MS of samples of surface till deposited from the Ontario and Erie ice lobes reflects the higher values of MS from that area of the Shield north of Lake Ontario and these samples are significantly higher in magnetic material than samples taken from the Huron lobe on the east side of Lake Huron. Thus the MS of till may be used to differentiate tills in southwestern Ontario on the basis of source area.Measurements of MS from two tills of differing age in the Toronto area show that the two have significantly different MS values and consequently the mean MS values may be used to trace these tills in the subsurface and in areas remote from the sampled sections.The results indicate that the MS of tills provides a rapid and accurate technique for the glacial geologist to identify the source area of tills and to differentiate tills found south of the Precambrian–Paleozoic boundary.

Influence of the sex and type of tissue on the basic chemical composition and the content of minerals in the sirloin and offal of fattener pigs

2019 ◽  
Vol 99 (2) ◽  
pp. 343-348 ◽  
Author(s):  
Marek Babicz ◽  
Anna Kasprzyk ◽  
Kinga Kropiwiec-Domańska
Keyword(s):  
Chemical Composition ◽  
Mineral Content ◽  
Cadmium Concentration ◽  
Pork Meat ◽  
Threshold Values ◽  
Large White ◽  
Sodium Calcium ◽  
Mineral Components ◽  
Longissimus Lumborum ◽  
The Mean

The aim of the study was to determine the basic chemical composition and mineral content in the sirloin and offal of fattener pigs, taking their sex into consideration. In addition, comparative analysis of the content of chemical and mineral components in the sirloin and offal was performed. The experimental material included 24 crossbred (Polish Landrace × Polish Large White) fatteners, from which samples of sirloin (musculus longissimus lumborum), liver, heart, and kidneys were collected for the analysis. A significant effect of the sex on the fat content in the sirloin and liver and on the level of magnesium (Mg), zinc, and iron (Fe) in the sirloin was demonstrated. Significant differences were found in the basic chemical composition and mineral content between the sirloin and the offal. In comparison with the liver, the sirloin contained lower amounts of protein and fat and higher potassium and Mg contents. In turn, the offal was shown to be a rich source of sodium, calcium, and trace elements (Fe, manganese, and copper). The mean cadmium concentration in the sirloin and offal was significantly lower than the threshold values for these elements, i.e., it accounted for 26% and 6.2% (liver)–19.5% (heart) of the allowable content of this element in pork meat and offal.

Watershed derived nutrients for Lake Ontario inflows: Model calibration considering typical land operations in Southern Ontario

2015 ◽  
Vol 41 (4) ◽  
pp. 1037-1051 ◽  
Author(s):  
Masoud Asadzadeh ◽  
Luis Leon ◽  
Craig McCrimmon ◽  
Wanhong Yang ◽  
Yongbo Liu ◽  
...  
Keyword(s):  
Model Calibration ◽  
Lake Ontario ◽  
Southern Ontario

THE STATUS OF PARASITES OF THE APPLE MAGGOT, RHAGOLETIS POMONELLA (DIPTERA: TEPHRITIDAE), IN ONTARIO

1971 ◽  
Vol 103 (4) ◽  
pp. 507-512 ◽  
Author(s):  
L. G. Monteith
Keyword(s):  
Lake Ontario ◽  
Rhagoletis Pomonella ◽  
Southern Ontario ◽  
Niagara Escarpment ◽  
The Status

AbstractOpius melleus Gah. and O. lectus Gah. were the only parasites of Rhagoletis pomonella (Walsh) found in southern Ontario during a 4-year survey. The parasites were found only in the Niagara Region on the slope of the Niagara Escarpment and between it and Lake Ontario. The population of parasites was low though they appeared to be well adapted to attack R. pomonella. They were found in, or adjoining, unsprayed sites where there was shrubby growth under the trees infested by R. pomonella.

A Comparison of Urbanization Effects on Stream Benthic Macroinvertebrates and Water Chemistry in an Urban and an Urbanizing Basin in Southern Ontario, Canada

2010 ◽  
Vol 45 (3) ◽  
pp. 327-341 ◽  
Author(s):  
Normand L. Bazinet ◽  
Beth M. Gilbert ◽  
Angela M. Wallace
Keyword(s):  
Land Cover ◽  
Urban Development ◽  
Correspondence Analysis ◽  
Lake Ontario ◽  
Urban Land ◽  
Biotic Index ◽  
Southern Ontario ◽  
Urban Land Cover ◽  
Linear Relationships ◽  
Lake Simcoe

Abstract Benthic invertebrate communities were compared in several watersheds within an urban basin and an urbanizing basin in southern Ontario, Canada. The urban watersheds of the Lake Ontario basin and the urbanizing watersheds within the Lake Simcoe basin share similar geologies, soils, and climates, but differ in the stage of urban development within these two basins. Correspondence analysis showed that invertebrate populations formed distinct groups split between these two basins owing to intense urban development in the Lake Ontario watersheds versus the agricultural nature of the Lake Simcoe basin. Canonical correspondence analysis ordinations indicated that the major environmental gradients were related to urban land cover (imperviousness), chloride, nitrates and stream order factors. Urban land cover and chloride were most strongly associated with the first axis. The typical logarithmic relationship between urban land cover and benthos found in other studies was not evident in this study. Rather, 9 of the 12 metrics tested had significant linear relationships with urban land cover. The Hilsenhoff Family Biotic Index and percent Oligochaeta metrics showed the strongest positive linear relationships with urban land cover. Pollution sensitive groups (Ephemeroptera, Plecoptera, and Trichoptera) along with richness and diversity measures decreased with increasing urbanization.

Invertebrate Fossils (Insecta: Trichoptera, Diptera, Coleoptera) from the Pleistocene Scarborough Formation at Toronto, Ontario, and their paleoenvironmental Significance

1981 ◽  
Vol 16 (2) ◽  
pp. 146-166 ◽  
Author(s):  
Nancy E. Williams ◽  
John A. Westgate ◽  
D. Dudley Williams ◽  
Anne Morgan ◽  
Alan V. Morgan
Keyword(s):  
Feeding Habits ◽  
Climatic Conditions ◽  
Deciduous Species ◽  
Forest Environment ◽  
Southern Ontario ◽  
Plant Remains ◽  
The Mean ◽  
Terrestrial Insects ◽  
Invertebrate Fossils ◽  
July Temperature

AbstractLarval caddisfly, chironomid, and beetle remains have been recovered from the Pleistocene Scarborough Formation in the Toronto region of southern Ontario. Three stratigraphic levels were sampled at the northeastern end of the Scarborough Bluffs; the youngest horizon yielded 16 chironomid taxa, 33 caddisfly taxa, and 28 beetle taxa, whereas the two older levels yielded somewhat less diverse assemblages. Only one taxon in each of the caddisfly and chironomid groups was identified from the presumed correlative beds at Woodbridge, Ontario, but numerous beetle fragments were recovered, several of which have been specifically identified and match species found previously in the upper part of the Scarborough Formation. The youngest sampled assemblage in the Scarborough Formation at the northeastern end of the Scarborough Bluffs is interpreted as indicating cool climatic conditions in a boreal forest environment, given the present-day distributions and feeding habits of these river, lake, and terrestrial taxa. The mean July temperature at this time was probably about 15°C, as compared to the present-day value of 20.5°C. The forest was poorer in deciduous species during deposition of the older part of the formation as preserved here. These results agree well with previous interpretations based on plant remains. We suggest that both aquatic and terrestrial insects are good indicators of macroclimate.

EFFECTIVE P, T RESTORATION IN CHERN–SIMONS SUPERCONDUCTIVITY

1994 ◽  
Vol 08 (08n09) ◽  
pp. 561-570 ◽  
Author(s):  
S. S. MANDAL ◽  
S. RAMASWAMY ◽  
V. RAVISHANKAR
Keyword(s):  
Dielectric Constant ◽  
Magnetic Susceptibility ◽  
Normal State ◽  
Time Reversal ◽  
Finite Temperature ◽  
Narrow Range ◽  
Mean Field ◽  
Smooth Transition ◽  
The Mean ◽  
Chern Simons

We present an analysis of the finite temperature Chern–Simons superconductivity model within the mean field framework. Using analytical and numerical means we compute the changes in the magnetic susceptibility, conductivity, the dielectric constant, and the specific heat as the temperature is increased. Over a narrow range of temperatures the properties of the system show a smooth transition to the normal state. Accompanying this is the near vanishing of the off-diagonal conductivity, signifying the effective restoration of parity and time reversal symmetries.

THE MINERAL CONTENT OF TIMOTHY GROWN IN PRINCE EDWARD ISLAND

1983 ◽  
Vol 63 (1) ◽  
pp. 133-139 ◽  
Author(s):  
KARL A. WINTER ◽  
UMESH C. GUPTA
Keyword(s):  
Prince Edward Island ◽  
Mineral Content ◽  
Phleum Pratense ◽  
High K ◽  
The Mean ◽  
Tissue Contents ◽  
Mg Content ◽  
Phleum Pratense L ◽  
Heading Stage ◽  
Cattle And Sheep

Timothy (Phleum pratense L.) samples from 107 sites throughout Prince Edward Island were obtained at the early heading stage and analyzed for Ca, P, K, Mg, Cu, Mo, S, Mn, Zn and Fe. The mean tissue contents of these minerals were: Ca, 0.25%; P, 0.24%; K, 2.12%; Mg, 0.10%; Cu, 4.5 ppm; Mo, 0.37 ppm; S, 0.12%; Mn, 31.1 ppm; Zn, 26.8 ppm and Fe, 30.5 ppm. When compared with the requirements of cattle and sheep Ca would be deficient for most age and production categories and the mean timothy Ca content was lower than published values. The Ca: P ratio was low at approximately 1:1. Mean Mg content of timothy was low relative to animals' requirements, which, combined with the low Ca and high K content of a number of samples, indicated there was a risk of grass tetany in grazing animals. Most trace elements were barely adequate or deficient relative to the needs of cattle and sheep. Copper, for example, at 4.5 ppm is deficient for cattle but lack of deficiency problems was attributed to correspondingly low Mo and S levels. The need for adequate Ca and P supplementation and the use of a suitable trace-mineralized salt is recommended in formulating diets for dairy cattle, beef cattle, and sheep. Key words: Timothy, forage, minerals, deficiency, cattle, sheep

The Seismicity of the Western Lake Ontario Area: Results from the Southern Ontario Seismic Network (SOSN), 1992-2001

2002 ◽  
Vol 73 (4) ◽  
pp. 534-551 ◽  
Author(s):  
R. F. Mereu ◽  
H. W. Asmis ◽  
B. Dunn ◽  
J. Brunet ◽  
D. Eaton ◽  
...  
Keyword(s):  
Lake Ontario ◽  
Seismic Network ◽  
Southern Ontario ◽  
Western Lake
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