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Hypothesis: Naturally extracted polysaccharides, such as guar gum, are promising candidates for environmentally friendly flotation reagents. It is hypothesized that the kinetics of collision of sub- to millimeter gas bubbles with a hydrophobic graphite surface, and the stability of thin liquid film formed between the bubble and surface is affected by an adsorbed layer of guar gum. Experiments: A combination of gravimetric (quartz crystal microbalance with dissipation) and imaging (atomic force microscopy) techniques was used to investigate the adsorption of guar gum on graphite surface, while high-speed camera imaging allowed for direct observation of the bubble collision process with guar gum-modified graphite surfaces with millisecond resolution. Findings: Atomic force microscope topography images revealed a guar gum concentration-dependent interconnected network of guar gum molecules adsorbed at graphite surface. These adsorbed molecules at low surface coverage, changed the wettabil ....
Shares of grocery store chain Sprouts Farmers Market (NASDAQ:SFM) jumped 15.2% in the afternoon session after the company reported first-quarter results with same-store sales above expectations, leading to a revenue and, ultimately, an EPS beat. Sprouts's optimistic earnings forecast for the next quarter and the full year were impressive, which beat analysts' expectations. Zooming out, we think this was a great quarter that shareholders will appreciate. ....
Grocery store chain Sprouts Farmers Market (NASDAQ:SFM) reported Q1 CY2024 results beating Wall Street analysts' expectations, with revenue up 8.7% year on year to $1.88 billion. It made a non-GAAP profit of $1.12 per share, improving from its profit of $0.98 per share in the same quarter last year. ....