Browsing Science (Faculty of) by Title
Now showing items 162-181 of 3014
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Assessment of ocular aberrations at scaled pupil size and reduced Shack-Hartmann spot number
(University of Waterloo, 2019-05-07)Wavefront aberrations describe the optical imperfections of the eye by measuring the complete refractive elements of the eye. However, the reliability of ocular aberration is uncertain under some challenges and issues. ... -
An Assessment of Pyridoxine as a Biological Response Modifier During Colon Carcinogenesis
(University of Waterloo, 2007-10-05)The main objective of this proposal was to investigate the effect of vitamin B6 on colon carcinogenesis in vivo. Two in vivo studies were conducted to determine the role of vitamin B6 as a biological modifier of colon ... -
Assessment of remote Patagonian riverine fish using environmental DNA
(University of Waterloo, 2022-04-26)Freshwater systems and fish communities face many anthropogenic threats such as climate change, pollution, and invasive species, causing a rapid loss of biodiversity. To protect freshwater fish basic knowledge of their ... -
Assessment of saltwater origin in the Rub’ al-Khali basin and its relation to the formation of sabkha Matti
(University of Waterloo, 2021-01-15)The Rub’ al Khali sand sea is the largest uninterrupted sand desert on Earth that occupies an area of approximately 650,000 km2 of the Arabian Peninsula. Yet, the desert basin is underlying by one of the largest multi-level ... -
Assessment of the cell cycle proteins Cdc7 and PCNA as markers of colon carcinogenesis in obese and lean rats
(University of Waterloo, 2009-11-23)Obesity increases the risk of colon cancer as well as the expression of many cancer markers, ostensibly due to the interaction between insulin resistance and adipocyte production of hormones, mitogens and cytokines which ... -
An Assessment of the Spatial and Temporal Variability of Biological Responses to Municipal Wastewater Effluent in Rainbow Darter (Etheostoma caeruleum) Collected along an Urban Gradient
(PLOS, 2016-10-24)Municipal wastewater effluent (MWWE) and its constituents, such as chemicals of emerging concern, pose a potential threat to the sustainability of fish populations by disrupting key endocrine functions in aquatic organisms. ... -
Assessment of toxic cyanobacterial abundance at Hamilton Harbour from analysis of sediment and water
(University of Waterloo, 2014-05-09)The western embayment of Lake Ontario, Hamilton Harbour, is one of the most polluted sites in the Laurentian Great Lakes and in recent years has seen a reoccurrence of cyanobacterial blooms. This study uses a multidisciplinary ... -
The association between two quality of life measures for first time low vision device users
(University of Waterloo, 2006)Many individuals with impaired vision experience a decreased quality of life. Quality of life is defined as "the degree to which an individual enjoys the important possibilities of their life. " Vision rehabilitation ... -
The Association between Visual Attention and Body Movement-Controlled Video Games, Balance and Mobility
(University of Waterloo, 2018-09-21)Purpose: Interactive video virtual-reality body movement games such as Xbox Kinect may have potential for training visual attention and physical fitness concurrently in older adults in order to reduce the risk of falls. ... -
Association of Intersex in Wild Fish with Wastewater Effluent in the Grand River, Ontario
(University of Waterloo, 2012-02-10)The Grand River watershed is the largest watershed in southern Ontario, and is expected to see major development and urban densification over the next 20 years. An expected 57% increase in population over the next two ... -
The associations between insulin, hypoglycemia, and dementia: Combating threats to internal validity in a series of population-based cohort studies
(University of Waterloo, 2023-05-01)Although the association between type 2 diabetes and dementia is recognized, findings from the epidemiology literature on the effect of insulin and one of its side effects, hypoglycemia, are less clear. The currently ... -
Associations between Oil Additives in Base Oils Probed by Pyrene Excimer Fluorescence
(University of Waterloo, 2017-10-23)A recently developed method based on pyrene excimer fluorescence was used to probe the interactions of important polymeric oil additives. First, three ethylene-propylene (EP) copolymers representative of viscosity index ... -
Asymmetric Alkenylation of Enones and Other α,β-Unsaturated Carbonyl Derivatives Using Chiral 3,3′-Disubstituted Binaphthols and Boronates
(University of Waterloo, 2009-05-22)Various α,β-unsaturated carbonyl compounds and derivatives were explored in order to expand the range of substrates for the 1,4-addition of alkenylboronates using 3,3′-disubstituted binaphthols. Enones 2.60 were examined ... -
Asymmetric Conjugate Addition of Arylboronates to α,β-unsaturated Enones Catalyzed by Substituted Binaphthols
(University of Waterloo, 2009-10-01)Conjugate addition reactions are one of the most widely used carbon-carbon bond forming reactions in organic synthesis. This reaction can form a chiral center and can be used for the synthesis of structurally complex ... -
Asymmetric Conjugate Addition of Boronates to N-Acylimines and β-Silyl-α,β-unsaturated Ketones Catalyzed by 3,3'-Disubstituted Binaphthols
(University of Waterloo, 2009-01-23)In order to extend the scope of asymmetric conjugate alkenylation catalyzed by 3,3′-disubstituted binaphthols, two classes of compounds were examined. Asymmetric 1,4-addition of alkenylboronates onto N-acylimines was ... -
Asymmetric Conjugate Additions of Boronates to α,β-Unsaturated Trifluoromethyl Ketones and Strategies Towards Asymmetric Conjugate Additions of N-Boc-Pyrrole Boronic Acid
(University of Waterloo, 2016-08-24)An important class of organic molecules are those that contain fluorine. Fluorinated molecules have found widespread use in medicinal chemistry, as well as in agrochemicals. This is due to the ability of fluorine to act ... -
Asymmetric soft-hard colloidal mixtures: osmotic effects, glassy states and rheology
(American Institute of Physics, 2017-09-06)Whereas mixtures of colloids and non-adsorbing polymers have been studied in great detail in the last two decades, binary colloidal mixtures have not received much attention. Yet, fragmental evidence from asymmetric mixtures ... -
Asymmetric Synthesis using 3,3'-Disubstituted Binaphthol-modified Boronates
(University of Waterloo, 2006)A number of 3,3'-disubstituted binaphthol-modified allylboronates (<strong>2. 42a-m</strong>) were prepared from the reaction between triallylborane and the corresponding 3,3'-disubstituted binaphthols. These chiral ... -
At the Corner of Space and Time
(University of Waterloo, 2019-12-09)We perform a rigorous piecewise-flat discretization of classical general relativity in the first-order formulation, in both 2+1 and 3+1 dimensions, carefully keeping track of curvature and torsion via holonomies. We show ... -
Atmospheric acidification of mineral aerosols: a source of bioavailable phosphorus for the oceans
(European Geosciences Union, 2011-07-01)Primary productivity of continental and marine ecosystems is often limited or co-limited by phosphorus. Deposition of atmospheric aerosols provides the major external source of phosphorus to marine surface waters. However, ...