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Showing 1 to 20 of 33 for “"Sodium calcium"”.
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Spatial organization of sodium calcium exchanger and caveolin-3 in developing mammalian ventricular cardiomyocytes
… mechanism of excitation-contraction coupling is calcium-induced calcium release (CICR) mediated by L-type Ca2+ channels (Cav1.2). Briefly, membrane depolarization opens voltage-gated Cav1.2 to allow for the influx of extracellular Ca2+ into the cytosol. This small sarcolemmal (SL) Ca2+ influx is …
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The role of sodium-calcium exchanger in the electrical activity of embryonic chicken heart
… for its function. It has been shown that the sodium-calcium exchanger (NCX) is an important exchanger for calcium homeostasis. We hypothesize that the NCX may be present during development. To test this hypothesis we recorded the spontaneous electrical activity of heart from the embryonic …
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Sodium-Calcium Ratios in the Planktic Foraminifera <i>Trilobatus Sacculifer</i> as a Proxy for Sea Surface Salinity
… seawater salinity and the incorporation of sodium into foraminiferal calcite, suggesting a potential new proxy for reconstructing past changes in sea surface salinity (SSS) (Mezger et al., 2016 and Bertlich et al., 2018). In order to test the applicability of this new proxy in an open-ocean …
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Ion Filtration and Stable Oxygen Isotopic Fractionation Resulting From the Passage of Sodium-Calcium-Chloride Brine Through Compacted Smectite Layers at Elevated Temperatures and Pressures
A solution 5.00 molal in NaCl and 0.45 molal in CaCl(,2) was forced through 1.5 cm-thick clay plugs made of sedimented, randomly-oriented one-half to two micron diameter montmorillonite flakes. Two sets of experiments were carried out. In one set the confining pressure on the clay was 5000 pounds …
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Cellular Calcium Movements and Excitation-Contraction Coupling in Guinea Pig Atria
… attached to a force transducer and impaled with calcium sensitive micro-electrodes. The tissue was stimulated through 2 AgCl electrodes at 2 pulses per second (pps). When the tissue had reached a steady-state of contraction strength, rest intervals of 1 minute were introduced and the changes in …
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ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ - ΚΑΤΩ ΑΠΟ ΦΥΣΙΚΕΣ ΣΥΝΘΗΚΕΣ - ΤΗΣ ΧΗΜΙΚΗΣ ΣΥΣΤΑΣΗΣ ΚΑΙ ΤΗΣ ΡΥΠΑΝΤΙΚΗΣ ΙΣΧΥΟΣ ΤΩΝ ΑΠΟΒΛΗΤΩΝ ΜΙΚΡΗΣ ΟΙΚΟΓΕΝΕΙΑΚΗΣ ΔΟΜΗΣ ΑΓΕΛΑΔΟΤΡΟΦΙΚΗΣ ΕΠΙΧΕΙΡΗΣΗΣ
… AMMONIA, TOTAL PHOSPHORUS, POTASSIUM. METALS: SODIUM, CALCIUM, MAGNESIUM, MANGANIUM, COPPER, FERRUM AND ZINC. PH AND ELECTRIC CONDUCTIVITY WERE ALSO DETERMINED. DURING THIS PERIOD, METEOROLOGICAL PARAMETERS SUCH AS TEMPERATURE, RAINFALL AND MOISTURE WERECOLLECTED DAILY.
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Water chemistry characterization and component performance of a recirculating aquaculture system producing hybrid striped bass
… were chloride, nitrate, sulfate, phosphate, sodium, calcium, magnesium and potassium. Trace levels of TAN, nitrite, iron and copper were also observed. Sodium, calcium and chloride levels were controlled based on a preplaned water exchange and chemical management method. TAN, nitrite and …
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The characterisation of alginate systems for biomedical applications
… focused on a range of polysaccharides, including sodium alginates (with varying mannuronic (M)/guluronic (G) acid ratio), pectin and sodium carboxymethylcellulose (CMC), for wound dressing applications. The samples were prepared as mixed salts such as sodium/calcium salts as Ca2+ ions are known to …
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Calcium and growth hormone secretion in the domestic fowl (Gallus domesticus)
Extracellular calcium is a ubiquitous molecule required for secretagogue induced growth hormone release from somatotroph cells of the chicken anterior pituitary. Growth hormone release can be induced via different intracellular pathways and these in turn can act to produce a synergistic hormone …
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Limnology of Three Farm Ponds in South-Central South Dakota
… carbonates, and chlorides, while cations were sodium, calcium, magnesium, and potassium. Nitrates, phosphates, and iron were never a limitin factor in primary production. Phytoplankton population were dominated by a blue-green algae, Microcystis, which reached a maximum population of 9.3 cc/m3. …
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Evolution of Voltage-gated Ion Channels
… that facilitate the transfer of charged sodium, calcium, and potassium ions across the cell membrane (Hodgkin & Huxley 1952). The channels contain a selective ion-conducting pore along with several other structural and gating features that come together to form a functional hetero- or …
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The Development and Optimization of Raman Spectroscopy Analyses for Mobile Salinity Sensing
… consisting of the five most common salt deicers: sodium, calcium, and magnesium chloride, potassium acetate, and calcium magnesium acetate. The Raman spectra are analyzed using previously proven methods for determining chloride salt concentration that were optimized to work with both acetate and …
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Data analysis to understand coordination and topological environments in oxides
… common cations in oxides, identifying lithium, sodium, calcium, and magnesium ion's preferred coordination numbers are 4- fold/6-fold, 6-fold, 6-fold, and 6-/4-fold coordination respectively. We also develop a method to quantify the connectivity between two polyhedra and determine whether they …
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Ankyrin-B and Mtor Complex 1 In The Regulation of Electrical Activities In The Heart
… transporters that are critical for maintaining calcium ion homeostasis, which underlies normal excitation-contraction coupling. Sustained mTORC1 activity in the heart decreases the expression of ankyrin-B and alters the electrical conductance between the atria and ventricles. These effects are …
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The geohydrology and hydrogeochemistry of the proposed Garrison Lignite Mine
… dissolved solids with dominant concentrations of sodium, calcium, bicarbonate, and sulfate. By passing through silty clay into lignite, total dissolved solids decrease and there are dominant concentrations of sodium, bicarbonate, and sulfate. As the groundwater flows deeper into the Sentinel Butte …
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Functional characterization of a putative Plasmodium falciparum calcium/hydrogen antiporter pfcha
… of essential genes are needed. Although the calcium metabolism is very important in the life of P. falciparum, little is known about the genes which regulate the transport of calcium. With the release of the P. falciparum genome, a putative calcium hydrogen antiporter has been identified. To …
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