Results 31 to 40 of about 4,176,998 (193)
Paleoceanography and Paleoclimatology, 2022 Upwelling deep waters in the Southern Ocean release biologically sequestered carbon into the atmosphere, contributing to the relatively high atmospheric CO2 levels during interglacial climate periods.
T. Vollmer, T. Ito, J. Lynch‐Stieglitz
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Biological Proton Pumping in an Oscillating Electric Field [PDF]
Physical Review Letters, 2009 Time-dependent external perturbations provide powerful probes of the function of molecular machines. Here we study biological proton pumping in an oscillating electric field. The protein cytochrome c oxidase is the main energy transducer in aerobic life, converting chemical energy into an electric potential by pumping protons across a membrane.
Kim, Y. +2 more
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Geophysical Research Letters, 2022 Radium isotopes are powerful proxies in oceanography and hydrology. Radium mass balance models, including assessments of submarine groundwater discharge (SGD), often overlook particle scavenging (PS) as a pathway for dissolved radium removal from the ...
Bochao Xu +8 more
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A New Radiotracer for Particulate Carbon Dynamics: Examination of 210Bi‐210Pb in Seawater
Geochemistry, Geophysics, Geosystems, 2022 210Bi (t1/2 = 5.01 d) is theoretically a radionuclide for tracing the particle cycle over a timescale of hours to days. However, it has been rarely investigated in marine environments due to its very short half‐life and low activity.
Weifeng Yang +4 more
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The deformation of marine snow enables its disaggregation in simulated oceanic shear
Frontiers in Marine Science, 2023 Understanding the effect of hydrodynamics on aggregate size and structure is key to predicting mass transport in the aquatic environment. Aggregation theory of particles is well established but our knowledge of deformation processes, biological bonding ...
Yixuan Song +2 more
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Nature, 1967 THE recent exchange between Woolhouse1 and Popper2 presents the enigma of the low entropy content of living systems. The means whereby their rapid decay into the inert state of “equilibrium” is avoided are serious problems to the theoretical biologist. It is, of course, to Schrodinger3 that we owe the classic analysis of biological entropy.
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The Ocean's Biological Pump: In Situ Oxygen Measurements in the Subtropical Oceans
Geophysical Research Letters, 2022 The magnitude and distribution of the ocean's biological pump (the downward flux of organic carbon (OC) from the ocean surface) influences the pCO2 of the atmosphere and the O2 content of the deep sea, but has not been well quantified.
S. Emerson, Bo Yang
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Chloride Pumps in Biological Membranes
Zoological Science, 1992 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Gerencser, George A., Zelezna, Blanka
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An autologous biologic pump motor
The Journal of Thoracic and Cardiovascular Surgery, 1986 Latissimus dorsi skeletal muscle ventricles were constructed in six beagles. They first underwent a period of vascular delay and of electrical preconditioning over several weeks. The skeletal muscle ventricles were then connected to a totally implantable mock circulation that allowed for the chronic measurement of pressures and flows produced by the ...
M A, Acker +4 more
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Summer net community production in the northern Chukchi Sea: Comparison between 2017 and 2020
Frontiers in Marine Science, 2022 The Arctic Ocean environment is drastically changing because of global warming. Although warming-induced processes, such as the decrease in sea-ice extent and freshening of the surface layer, have the potential to alter primary production, the changes ...
Soyeon Kwon +12 more
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