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· The solid-state structures of unsolvated potassium, rubidium, and cesium carbazolates were determined using laboratory X-ray powder diffraction data. ... Photoinduced, Copper-Catalyzed Alkylation of Amines: A Mechanistic Study of the Cross-Coupling of Carbazole with Alkyl Bromides. Journal of the American Chemical Society 2017, 139 (36), 12716 ...
· The concentrations of sodium and potassium (K) can range up to several percentage points in soils while those of Li, rubidium, and Cs rarely exceed several hundred micrograms per gram. Methods to determine total K and the other alkali elements in soils use acids or a high temperature fusion to decompose the soil.
· No, rubidium is more reactive than potassium. The explanation for this is that rubidium has its single electron farther from the nucleus, where it is more easily removed. However, rubidium is also ...
potassium; rubidium; silver ores; South America; veins; volcanic rocks; Julcani District; Latitude & Longitude S13°00'00" - S12°55'00", W74°55'00" - W74°45'00" View Full GeoRef Record. POWERED BY . Citing articles via. Web of Science (9) …
@article{osti_5775600, title = {Potassium and rubidium adsorption and diffusion in soil}, author = {Baligar, V C and Barber, S A}, abstractNote = {Uptake of cations by plant roots growing in soil is believed to be influenced by the relative adsorption strengths of cations by soil exchange sites. The adsorption of K and Rb by four soils was investigated to determine the differences in ...
· Under similar conditions, rubidium and cesium show the similar adsorption amount. The adsorbent has a fast adsorption rate and an adsorption capacity of about 1.55 mmol g −1 for rubidium and 1.47 mmol g −1 for cesium when the initial metal ion concentration is 0.10 mol L −1. The composite adsorbent is effective for the adsorption of ...
· Potassium, rubidium and cesium hydrides as dehydrogenation catalysts for the lithium amide/magnesium hydride system. Full Record; Other Related Research; Authors: Durojaiye, Tolulope; Hayes, Jalaal; Goudy, Andrew Publication Date: Sun Feb 01 00:00:00 EST 2015 Sponsoring Org.: USDOE OSTI Identifier:
· Potassium, rubidium and cesium hydrides as dehydrogenation catalysts for the lithium amide/magnesium hydride system. ... RbH > KH > CsH > Un-catalyzed. Modeling studies …
· ATP-dependent net rubidium efflux (normal influx) occurs when the pH is reduced from approximately 7.0 to 6.2 or less. This efflux is inhibited by strophanthidin and vanadate. …
The period of the circadian rhythm of wheel-running was shortened when golden hamsters were given supplemental dietary potassium or rubidium for two weeks. Treatment with 4-aminopyridine, a potassium channel blocker, significantly increased circadian period. These period changes (0.17 h for potassium treatment, 0.14 h for rubidium, and 0.07 h ...
In a cancerous cell, the charge (called cell voltage) drops. When the cell voltage gets too low, only 5 substances can pass in or out of the cell: water, sugar, potassium, cesium and rubidium. In …
· After four-stage countercurrent scrubbing, the scrubbing rates of rubidium and potassium were 99.83% and respectively, as well as 5.73% of cesium was lost. ... The …
A rhodium-catalyzed asymmetric addition of readily available potassium organotrifluoroborates to both N-tosyl and N-nosyl ketimines has been developed. High enantioselectivity has been achieved by using a chiral diene ligand, and the nosyl group of the addition products can be easily removed while retaining the enantiomeric purity.
In a cancerous cell, the charge (called cell voltage) drops. When the cell voltage gets too low, only 5 substances can pass in or out of the cell: water, sugar, potassium, cesium and rubidium. In studies with mice, rubidium has also helped decrease tumor growth, possibly by replacing potassium in cell transport mechanisms or by rubidium ions ...
· Alkali metalPeriod 5 element. Rubidium/Chemical series. Rubidium is the chemical element with the symbol Rb and atomic number 37. Rubidium is a very soft, silvery-white metal in the alkali metal group. Rubidium metal shares similarities to potassium metal and caesium metal in physical appearance, softness and conductivity.
The element : Rubidium was discovered by R. Bunsen and G. R. Kirchhoff in year 1861 in Germany. Rubidium derived its name from the Latin rubidus, meaning 'deep red'.The element : Potassium was discovered by H. Davy in year 1807 in United Kingdom. Potassium derived its name from New Latin potassa, 'potash' (kalium in Latin).Discovery
· A new MOFs-based adsorbent [email protected] was prepared by hybridization of 25,27-bis(iso-propoxyl)-calix[4]arene-26,28-crown-5 (iPCC5) into the pores of UiO-66, one of the Zr-MOFs. The adsorption of K and Rb onto [email protected] from 0.4 to 6.0 M HNO3 was studied. [email protected] showed strong adsorption ability and selectivity for K and Rb over others. The …
· Temperatures approaching 700 °C risk formation of the alkali oxide (decomposition is catalyzed by certain elements/compounds) ... The alkali metals, lithium (Li), sodium (Na), potassium (K), rubidium (Rb) and cesium (Cs), are all extremely light in weight, compressible, and relatively, very soft.
· No, rubidium is more reactive than potassium. The explanation for this is that rubidium has its single electron farther from the nucleus, where it is more easily removed. However, rubidium is also ...
The reactions KRb + KRb → K 2 Rb + Rb and KRb + KRb → KRb 2 + K could also be exothermic. All of these reactions require breaking and making molecular bonds. If the KRb molecules are prepared in an excited hyperfine state, spin relaxation to a lower hyperfine state provides an additional inelastic scattering mechanism.
· Albite samples from the Rutherford pegmatite show a linear covariance of potassium and rubidium. The equation for this line is log Rb (ppm)= 2.929 + 2.433log K (%). The …
Mass spectrographic and isotope studies have shown that potassium, rubidium, and especially cesium are most efficiently taken up by cancer cells. Glucose can still enter the cell, but oxygen cannot. The cell thus becomes anaerobic. In the absence of oxygen, the glucose undergoes fermentation to lactic acid. The cell pH then drops to 7 and…
ATP-dependent net rubidium efflux (normal influx) occurs when the pH is reduced from approximately 7.0 to 6.2 or less. This efflux is inhibited by strophanthidin and vanadate. These experiments support the notion that the sodium pump can operate as an ATP-dependent proton-activated rubidium (potassium) pump without obligatory countertransport ...
· Porous carbon nanotubes catalyzed by potassium chloride have specificity. As shown in the Fig. 3a-c, the CC-700 without potassium chloride is a porous carbon skeleton with the …
The element : Potassium was discovered by H. Davy in year 1807 in United Kingdom. Potassium derived its name from New Latin potassa, 'potash' (kalium in Latin).The element : Rubidium was discovered by R. Bunsen and G. R. Kirchhoff in year 1861 in Germany. Rubidium derived its name from the Latin rubidus, meaning 'deep red'.Discovery: H. Davy (1807)
· Although the sodium pump normally exchanges three sodium for two potassium ions, experiments with inside-out red cell membrane vesicles show that the …
· Potassium, rubidium and cesium hydrides as dehydrogenation catalysts for the lithium amide/magnesium hydride system. Full Record; Other Related Research; Authors: Durojaiye, …
· Potassium, rubidium and cesium hydrides as dehydrogenation catalysts for the lithium amide/magnesium hydride system. Author links open overlay panel Tolulope Durojaiye. ...
· Whereas potassium complexes with bromide from the perovskite precursor solution to form thin surface passivation layers, rubidium additives favor the formation of phase …
The results show that the notion that the sodium pump can operate as an ATP-dependent proton-activated rubidium (potassium) pump without obligatory countertransport of sodium ions is supported. Although the sodium pump normally exchanges three sodium for two potassium ions, experiments with inside-out red cell membrane vesicles show that the stoichiometry is reduced …
· Whereas potassium complexes with bromide from the perovskite precursor solution to form thin surface passivation layers, rubidium additives favor the formation of phase-segregated micron-sized rubidium halide crystals. This tolerance to higher loadings of potassium allows us to achieve superior luminescent properties with potassium passivation.
