Briefly, to prepare the bacterial lysates for ELISA the overnight colonies were scraped off from the surface of agar media and resuspended in 0.5 ml of cold carbonate-bicarbonate buffer (pH 9.6).
In cold fluid-generated carbonate bodies from Morocco and Italy, belonging to different geological ages and environmental settings, we describe complex structures that we have attributed to microbial activity.
A tentative, possibly not exhaustive list of these systems includes (a) open slope systems, (b) submarine canyons, (c) deep basins, (d) seamounts, (e) deep-water coral systems, (f) cold seeps and carbonate mounds, (g) hydrothermal vents, and (h) permanent anoxic systems.
Our finding of unambiguous, microbial-derived structures in cold fluid-generated carbonates improves the astrobiological potential of these types of rocks.
In the southeastern Mediterranean, communities of polychaetes and bivalves were also found associated with cold seeps and carbonates near Egypt and the Gaza Strip at depths of 500 800 m, but no living fauna was collected [199].
After incubation at 80 °C for 5 min, the reaction was stopped by adding 1 mL of cold 200 mM sodium carbonate.
Incubation was performed at 37 °C, and p- and o-nitrophenol were quantified at 400 and 420 nm, respectively, after the addition of 2.5 mL of cold 0.25 M sodium carbonate.
Adding an accelerator, like calcium carbonate, in cold weather may decrease the waiting time for finishing your concrete, but follow the concrete suppliers suggestions if you do use it.
The cells were disrupted by sonication and unbroken cells removed by centrifugation at 2500×g for 10 min. The supernatant was diluted to a final volume of 50 mL with ice-cold 0.1 M sodium carbonate, pH 11 and the solution was gently stirred at 4°C for 1 h.
High latitude regions are predicted to be particularly affected due to cold waters and naturally low carbonate saturation levels.
