A5065765706- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Icing and De-icing Technologies
- Arctic and Antarctic ice dynamics
- nanoparticles nucleation surface interactions
- Freezing and Crystallization Processes
- Smart Materials for Construction
- Genetics, Aging, and Longevity in Model Organisms
- Chemical Thermodynamics and Molecular Structure
- Biochemical and biochemical processes
- Olfactory and Sensory Function Studies
- Climate change and permafrost
- Air Quality and Health Impacts
- Circadian rhythm and melatonin
- Insect Utilization and Effects
University of British Columbia
2021-2024
STMicroelectronics (India)
2021
Pomona College
2018
Food choice is critical for survival because organisms must choose food that edible and nutritious avoid pathogenic food. Many organisms, including the nematode C. elegans, use olfaction to detect distinguish among sources. elegans exhibits innate preferences odors of different bacterial species. However, little known about strains isolated from their natural environment as well attractive volatile compounds released by preferred bacteria isolates. We tested odor non-pathogenic found in...
Atmospheric ice nucleating substances (INSs) play a crucial role in cloud formation above -35°C, impacting radiative properties, lifetime, and the hydrological cycle. Characterizing inorganic (e.g., mineral dusts, volcanic ash, metals) organic bacterial cells, fungal spores, pollen, various biomacromolecules) INSs has typically involved: 1) single-particle analyses, which offer high resolution but require specialized equipment, 2) bulk sample treatment heat, H2O2,...
Abstract. A wide range of materials including mineral dust, soil and bioaerosols have been shown to act as ice nuclei in the atmosphere. During atmospheric transport, these can become coated with inorganic organic solutes which may impact their ability nucleate ice. While a number studies investigated at low concentrations on nucleation by dusts, very few examined non-mineral dust nuclei. We studied effect dilute (NH4)2SO4 solutions (0.05 M) immersion freezing variety ice-nucleating...
Animals have evolved specialized pathways to detect appropriate food sources and avoid harmful ones. Caenorhabditis elegans can distinguish among the odors of various species bacteria, its major source, but little is known about what specific chemical cue or combination cues C. uses recognize different microbes. Here, we examine strong innate attraction for odor pathogenic bacterium, Serratia marcescens. This initial likely facilitates ingestion infection host. Using solid-phase...
Our results suggest that a significant source of ice nucleating particles at Alert, Nunavut, during October and November, was likely ice-free snow-free land latitudes >50 °N.
Ice nucleating substances (INSs) influence the properties and frequencies of ice mixed-phase clouds in atmosphere, hence, climate hydrological cycle. INSs can be classified as inorganic (e.g., mineral dust, volcanic ash) or organic bacterial cells, cell-free proteins). While both INS classes have been studied laboratory, amounts atmosphere are still poorly constrained. Here, we demonstrate a new method for separating quantifying INSs. First, suspensions were separated into high-density...
Ice nucleating substances (INSs) influence the properties and frequencies of ice mixed-phase clouds in atmosphere, hence, climate hydrological cycle. INSs can be classified as inorganic (e.g., mineral dust, volcanic ash) or organic bacterial cells, cell-free proteins). While both INS classes have been studied laboratory, amounts atmosphere are still poorly constrained. Here, we demonstrate a new method for separating quantifying INSs. First, suspensions were separated into high-density...
Ice nucleating substances (INSs) influence the properties and frequencies of ice mixed-phase clouds in atmosphere and, hence, climate hydrological cycle. INSs can be classified as inorganic (e.g., mineral dust, volcanic ash) or organic bacterial cells, cell-free proteins). While both INS classes have been studied laboratory, amounts are still poorly constrained. Here, we demonstrate a new method for separating quantifying INSs. First, suspensions were separated into high-density isolate...
Abstract Mineral dust is one of the most abundant types ice nucleating particles in atmosphere. During atmospheric transport, mineral can become coated with inorganic and organic solutes, which impact their nucleation activity. Aminium cations formed from amines are type solute that coat atmosphere, but effects on activity have not been studied. We investigated primary, secondary, tertiary aminium methyl ethyl groups, as well ammonium cations, K‐feldspar, an important dust, immersion...
<p>EGU Abstract</p><p> </p><p>A wide range of materials including mineral dust, soil and bioaerosols have been shown to act as ice nuclei in the atmosphere. During atmospheric transport, these can become coated with inorganic organic solutes which may impact their ability nucleate ice. While a number studies investigated at low concentrations on nucleation by dusts, very few examined non-mineral dust...
<p>Ice nucleating particles (INPs) can initiate ice formation in clouds, which has a large impact on the hydrological cycle and radiative budget of Earth. Constraints concentration composition INPs are needed to predict clouds hence climate. Despite previous INP measurements Arctic, our understanding concentrations, composition, sources Arctic is insufficient. Here we report daily concentrations at Alert, ground site Canadian High during October November 2018. The contributions...
Abstract. A wide range of materials including mineral dust, soil and bioaerosols have been shown to act as ice nuclei in the atmosphere. During atmospheric transport, these can become coated with inorganic organic solutes which may impact their ability nucleate ice. While a number studies investigated at low concentrations on nucleation by dusts, very few examined non-mineral dust nuclei. We studied effect dilute (NH4)2SO4 solutions immersion freezing variety nucleating substances bacteria,...