Journal: ACS Es&t Water

Article Title: Microbial Growth Curve Framework Provides Insights for Controlling Opportunistic Pathogens in Building Plumbing

doi: 10.1021/acsestwater.5c01431

Figure Lengend Snippet: Legionella pneumophila abundance in (a) cold water and (b) hot water plumbing samples at a rig age of 4–6 years. Water retention time (WRT) of 0 days: blend of unfiltered and granular activated carbon (GAC) filtered cold water entering the cold pipes and water heater tank to achieve target influent disinfectant concentration. WRT of 3.87 days: the WRT of the water heater tank (40 °C set point) that supplied the hot pipes was included in the WRT calculation of each hot water tap. Boxplots represent the 25th, 50th, and 75th percentile; whiskers represent 1.5 times the interquartile range. Total sample numbers varied by the tap corresponding to each WRT, and individual data points overlay the box plots. Horizontal dashed lines represent the NASEM Legionella action level of 50 CFU/mL. Note the difference in y -axis scale between panel a and b, to aid in visualizing the microbial growth curve for the cold and hot water, respectively.

Article Snippet: As summarized in Busch et al., before reaching the rig, town water is plumbed to flow through, or bypass, a set of granular activated carbon (GAC) filters (Pentair, Golden Valley, MN) capable of reducing total chlorine from >2.5 mg/L to 0.05 mg/L as Cl 2 .

Techniques: Concentration Assay

Journal: Nature Communications

Article Title: Genome-centric metagenomics reveals electroactive syntrophs in a conductive particle-dependent consortium from coastal sediments

doi: 10.1038/s41467-026-70468-2

Figure Lengend Snippet: Methane production (●) and acetate consumption (▲) over 42 days in anaerobic cultures incubated a with granular activated carbon (GAC) or b without GAC; values are means ± SD of biological replicates ( n = 3 for control without GAC and n = 6 for cultures with GAC). c – e Representative colorized helium-ion microscopy (HIM) micrographs of GAC particles collected at day 42 from three independent biological replicates. 5–9 images were collected per replicate. The images show Methanosarcina cells (red, round cells) and associated bacterial partners (blue, long and short rods). Scale bars: 2 μm ( c , e ) and 1 μm ( d ). Created in BioRender. Rotaru, A. (2026) https://BioRender.com/jpxdj2c . Additional HIM micrographs are included in Supplementary Figs. , .

Article Snippet: Control incubations were prepared without conductive particles, while incubations with conductive particles received 10 g/L Granular Activated Carbon (GAC, Merck; <5 mm).

Techniques: Incubation, Control, Microscopy