Faculty of Science
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Department of Mathematics and Statistics
Mathematics faculty pre-prints and post-prints
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Composition of size-resolved aged boreal fire aerosols: Brown carbon, biomass burning tracers, and reduced nitrogen
(ACS Publications, 2018-02-06)Aerosols that were size-resolved into 13 fractions between 10 nm and 18 μm were collected from an aged boreal forest wildfire plume in July 2013. Samples were extracted into water and analyzed for molecular-size-resolved ... -
Understanding sources of atmospheric hydrogen chloride in coastal spring and continental winter
(ACS Publications, 2021-08-18)Ambient 0.5 Hz hydrogen chloride (HCl) measurements were made in Canadian cities to 17 investigate chlorine activation and constrain the tropospheric chlorine budget. Springtime HCl mixing ratios in a coastal city (St. ... -
Lewis acids and bases as molecular dopants for organic semiconductors
(Wiley, 2020-05-05)Controlling the concentration of charge carriers (mobile electrons and holes) in organic semiconductors is vital to precisely controlling their electronic properties. Significant efforts have gone into understanding how ... -
A boron dipyrromethene (BODIPY) based probe for selective passive sampling of atmospheric nitrous acid (HONO) indoors
(Royal Society of Chemistry, 2021-08-23)People spend up to 90 % of their time indoors, and yet our understanding of indoor air quality and the chemical processes driving it are poorly understood, despite levels of key pollutants typically being higher indoors ... -
Poly(5-vinylbenzothiadiazole) for High-Performance Lithium-Ion Batteries
(American Chemical Society, 2019-09-18)Redox-active polymers have recently become promising candidates for next- generation electrode materials in lithium ion batteries. Materials made from small molecules with one or multiple reversible redox states are required ... -
Phosphaviologen-based Pyrene-Carbon Nanotube Composites for Stable Battery Electrodes
(2020-03-04)The adoption of intermittent renewable power sources has placed battery technologies into the limelight, initiating a push to develop sustainable materials for energy storage that do not rely on rare or toxic elements. ... -
Cost and social distancing dynamics in a mathematical model of COVID-19 with application to Ontario, Canada
(The Royal Society Publishing, 2021-02-24)A mathematical model of COVID-19 is presented where the decision to increase or decrease social distancing is modelled dynamically as a function of the measured active and total cases as well as the perceived cost of ... -
An improved approximation for hydraulic conductivity for pipes of triangular cross-section by asymptotic means
(Springer, 2021-01-28)In this paper, we explore single-phase flow in pores with triangular cross-sections at the pore-scale level. We use analytic and asymptotic methods to calculate the hydraulic conductivity in triangular pores, a typical ... -
Elastic ‘tethers’ connect separating anaphase chromosomes in a broad range of animal cells.
(Elsevier, 2017-09)We describe the general occurrence in animal cells of elastic components (“tethers”) that connect individual chromosomes moving to opposite poles during anaphase. Tethers, originally described in crane-fly spermatocytes, ... -
The role of myosin phosphorylation in anaphase chromosome movement
(Elsevier, 2013-04)This work deals with the role of myosin phosphorylation in anaphase chromosome movement. Y27632 and ML7 block two different pathways for phosphorylation of the myosin regulatory light chain (MRLC). Both stopped or slowed ... -
Precocious cleavage furrows simultaneously move and ingress when kinetochore microtubules are depolymerized in Mesostoma ehrenbergii spermatocytes.
(Springer Link, 2018-03)A “precocious” cleavage furrow develops and ingresses during early prometaphase in Mesostoma ehrenbergii spermatocytes (Forer and Pickett-Heaps, 2010). In response to chromosome movements which regularly occur during ... -
Chromosomes selectively detach at one pole and quickly move towards the opposite pole when kinetochore microtubules are depolymerized in Mesostoma ehrenbergii spermatocytes.
(Springer Link, 2018-02)In a typical cell division chromosomes align at the metaphase plate before anaphase commences. This is not the case in Mesostoma spermatocytes. Throughout prometaphase the three bivalents persistently oscillate ... -
Tethers: elastic connections between separating partner chromosomes in anaphase
(Springer Link, 2018-05)Recent work has demonstrated the existence of elastic connections, or tethers, between the telomeres of separating partner chromosomes in anaphase. These tethers oppose the poleward spindle forces ... -
Movement of chromosomes with severed kinetochore microtubules
(Springer Link, 2015-01)Experiments from as early as 1966 and thereafter showed that anaphase chromosomes continued to move poleward after their kinetochore microtubules were severed by ultraviolet microbeam irradiation; these conclusions were ... -
Polyploidy and reduction divisions in cancer and mosquito gut cells
(Wiley, 2013-01)Several articles in a recent issue of this journal have called attention to a possible way by which cancer cells can evade death and become resistant to treatments (discussed in Erenpreisa et al., 2008; Wheatley, 2008). ... -
Do nuclear envelope and intranuclear proteins reorganize during mitosis to form an elastic, hydrogel-like spindle matrix?
(Springer Link, 2011-01)The idea of a spindle matrix has long been proposed in order to account for poorly understood features of mitosis. However, its molecular nature and structural composition have remained elusive. Here we ... -
Distance segregation of sex chromosomes in crane-fly spermatocytes studied using laser microbeam irradiations.
(Springer Link, 2013-10)Univalent sex chromosomes in crane-fly spermatocytes have kinetochore spindle fibres to each spindle pole (amphitelic orientation) from metaphase throughout anaphase. The univalents segregate in anaphase only after the ... -
Mitosis: spindle evolution and the matrix model
(Springer Link, 2009-03)Current spindle models explain “anaphase A” (movement of chromosomes to the poles) in terms of a motility system based solely on microtubules (MTs) and that functions in a manner unique to mitosis. We find both these ... -
What generates flux of tubulin in kinetochore microtubules?
(Springer Link, 2008-04)We discuss models for production of tubulin flux in kinetochore microtubules. Current models concentrate solely on microtubules and their associated motors and enzymes. For example, in some models the driving force for ...
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