Month: September 2022

SUPERSATURATION. "The most striking feature of calcification in the oceans is that it occurs almost exclusively by biogenic processes. Ca2 and CO2 inputs into the oceans occur through weathering of rocks, geothermal activity and hydrothermal seepage. The ocean is in fact supersaturated with Ca2 and CO2. However, spontaneous chemical precipitation is largely absent owing to the high concentrations of inhibitory ions in seawater and the presence of crystal poisons produced by the biota." https://lnkd.in/eXTtntg View in LinkedIn

SUPERSATURATION. "The most striking feature of calcification in the oceans is that it occurs almost exclusively by biogenic processes. Ca2 and CO2 inputs into the oceans occur through weathering of rocks, geothermal activity and hydrothermal seepage. The ocean is in fact supersaturated with Ca2 and CO2. However, spontaneous chemical precipitation is largely absent owing to the high concentrations of inhibitory ions in seawater and the presence of crystal poisons produced by the biota." https://lnkd.in/eXTtntg View in LinkedIn

SUPERSATURATION. "The most striking feature of calcification in the oceans is that it occurs almost exclusively by biogenic processes. Ca2 and CO2 inputs into the oceans occur through weathering of rocks, geothermal activity and hydrothermal seepage. The ocean is in fact supersaturated with Ca2 and CO2. However, spontaneous chemical precipitation is largely absent owing to the high concentrations of inhibitory ions in seawater and the presence of crystal poisons produced by the biota." https://lnkd.in/eXTtntg View in LinkedIn

CO2 AND RUBISCO. "In the marine environment, CO2 is present in micromolar concentrations, which may be lower than the dissociation constant (Km) for the photosynthetic carbon-fixing enzyme ribulose bisphosphate carboxylase oxygenase (Rubisco). Phytoplankton species that rely on CO2 diffusion to supply photosynthesis may be rate-limited by the CO2 concentration and diffusion to the site of Rubisco in the chloroplast." https://lnkd.in/eXTtntg View in LinkedIn

GENETICS. "Recent progress has been made in the cloning and functional expression of cDNAs coding diatom silicic acid transporters." https://lnkd.in/eXTtntg View in LinkedIn

SO ENDS this section on biomineralization by tiny marine creatures. Impressive scholarship has gone a long way to understanding the rule-breaking geometry and strange biomineralization chemistry; and to understanding the minimal surface energetics and bioenergetics in terms of ATP costs. Much more remains to be discovered. No aspect of nature is too insignificant to deserve the durable intellectual attentions of curious people. Be it butterfly wing scales, feather coloration, or the beauties of microscopic shells. View in LinkedIn

NOTHING TOO SMALL. No aspect of nature is too insignificant to deserve the durable intellectual attentions of curious people. Be it butterfly wing scales, chirality, feather coloration, or the beauties of microscopic marine shells. Centuries of careful scholarship of natural systems deepen our appreciation and connection to the natural world. View in LinkedIn

SO ENDS this section on biomineralization by tiny marine creatures. Impressive scholarship has gone a long way to understanding the rule-breaking geometry and strange biomineralization chemistry; and to understanding the minimal surface energetics and bioenergetics in terms of ATP costs. Much more remains to be discovered. View in LinkedIn

NON-CODING DNA REPEATS. "Repetitive genomic sequences indicate descent from retroviral infection events." https://lnkd.in/euyhznh View in LinkedIn

REGULATORY ELEMENTS. "If we imagine that humans and one of the simplest animals, Caenorhabditis elegans, share a nearly equal number of genes (ca. 20,000) it becomes obvious that the elements that create the enormous diversity are not the protein-coding genes but their higher order regulatory network that is processed by the mobile genetic elements, such as transposons and retroposons and the noncoding RNAs" (or viral derived elements). https://lnkd.in/euyhznh View in LinkedIn