However, the soda makes the glass water soluble, which is usually undesirable, so lime ( calcium oxide, generally obtained from limestone ), some magnesium oxide ( MgO ) and aluminium oxide ( Al < sub > 2 </ sub > O < sub > 3 </ sub >) are added to provide for a better chemical durability.

However, a more detailed analysis based on the Archimedean principle and the densities of magnesium and its combustion product shows that just being lighter than air cannot account for the increase in mass.

However, this can be a dangerous method, as the iron sparks, like the magnesium strips, burn at thousands of degrees and can ignite the thermite even though the sparkler itself is not in contact with it.

However, in 1947, magnesium production was no longer necessary for defense, and most of the 14, 000 BMI employees moved away.

However, the relative abundance of calcite-and aragonite-using lineages does not reflect subsequent seawater chemistry – the magnesium / calcium ratio of the oceans appears to have a negligible impact on organisms ' success, which is instead controlled mainly by how well they recover from mass extinctions.

However, following uterine inversion in the third stage of pregnancy, Terbutaline ( or either Halothane or magnesium sulfate ) can be utilized to relax the uterus if necessary prior to uterine replacement.

However, the unusual nature of ionic magnesium has also led to a major challenge in the use of the ion in biological systems.

However, not all osmolites have this effect on AVP release, so with magnesium chloride, the increase in osmolarity may not cause such a hypertensive response.

However, as noted, symptoms of low magnesium from pure dietary deficiency are thought to be rarely encountered.

However, with the construction of roads and subsequent developments came mining projects for limestone, magnesium, and potassium.

However, since the Mg < sup > 2 +</ sup > is charged and is bound within the membrane's electric field, depolarization of the membrane potential above threshold can dislodge the magnesium, allowing current flow through the NMDAR channel.

However, hypermagnesemia is not a prominent feature of renal insufficiency unless magnesium intake is increased.

However, this proved unacceptable for welding aluminum and magnesium because it reduced weld quality, and as a result, it is rarely used with GTAW today.

However, too much magnesium may cause diarrhea, resulting in dehydration and nutrient loss ( including magnesium itself, leading to a net loss, rather than a gain ).

However, it should not be used on steel, aluminum or magnesium because it can cause porosity and hydrogen embrittlement.

However, current does not flow through the NMDAR ion channel because it is instantaneously blocked by a magnesium ion ( Mg < sup > 2 +</ sup >) that binds to a site " inside " the open pore of the NMDAR channel.

However, when the cell is more hyperpolarized, the bound state of magnesium is stabilized and it leaves the channel less often and for a shorter period of time ( on average ).

However, soybean curds are formed from the chemical destabilization of the micelles ( using calcium sulfate, magnesium sulfate, etc.

However, the hydrogen-1 atom has no neutrons and a positive hydrogen ion has no electrons.

However, the element was not isolated in relatively pure form until after the development of ion exchange techniques by Frank Spedding at Iowa State University in the early 1950s.

However, this value is only approximate, as reaction quotient is defined in terms of ion activities which can be approximated with the concentrations as calculated here.

However, chelated Gd ( III ) compounds are far less toxic because they carry Gd ( III ) through the kidneys and out of the body before the free ion can be released into tissue.

However, there are seasonal changes in the molecular-to-atomic ratio of the neutral atmosphere that cause the summer ion loss rate to be even higher.

However, the archetypal channel pore is just one or two atoms wide at its narrowest point and is selective for specific species of ion, such as sodium or potassium.

However, his use of careful controls in his experiments revealed that the lithium ion had a calming effect by itself.

However, it is possible to measure the concentration of hydrogen ions directly, if the electrode is calibrated in terms of hydrogen ion concentrations.

However, the + 1 state, which is far more prominent in thallium than the elements above it, recalls the chemistry of alkali metals, and thallium ( I ) ions are found geologically mostly in potassium-based ores, and ( when ingested ) are handled in many ways like potassium ions ( K < sup >+</ sup >) by ion pumps in living cells.

However, the Hall thruster was only developed into an efficient propulsion device in the former Soviet Union, whereas in the US, scientists focused instead on developing gridded ion thrusters.

However, ion thrusters carry a fundamental price: the power imparted to the exhaust increases with the square of its velocity while the thrust increases only linearly.

However, the mechanism of the secretion of intra-vesicular contents out of the cell is very different from the incorporation of ion channels, signaling molecules, or receptors at the cell membrane.

However, in physiology, due to active ion pumps, the inside and outside of a cell are not in equilibrium.

However, one also sees alpha particles in the ring current, a type of ion that is plentiful in the solar wind.

However, ion engines often use heavier elements like Xenon as the reaction mass, accelerated to much higher speeds using electric fields.

However, membrane pumps and ion channels also contain numerous charged and polar residues within the generally non-polar transmembrane segments.

However, their model considers only two types of voltage-sensitive ion channels, and makes several assumptions about them, e. g., that their internal gates open and close independently of one another.

However, x-ray crystallographic studies of both types of enzymes reveal that, other than containing a critical Mg2 + ion at the catalytic site, they are virtually unrelated to each other ; indeed template-dependent nucleotide polymerizing enzymes seem to have arisen independently twice during the early evolution of cells.

However, because the proton and the deuteron would be more than 200 times farther apart in the case of the electronic HDO molecule than in the case of the muonic ( p-μ-d )< sup >+</ sup > molecular ion, Jackson estimates that the rate of p-d " electron "- catalyzed fusion ( eCF ) is about 38 orders of magnitude ( 10 < sup > 38 </ sup >) slower than the rate of p-d muon-catalyzed fusion ( μCF ), which Jackson estimates to be about 10 < sup > 6 </ sup > per second, so p-d " electron "- catalyzed fusions ( eCF ) would be expected to occur at a rate of about 10 < sup >- 32 </ sup > per second, meaning that one p-d " electron "- catalyzed fusion ( eCF ) might occur once every 10 < sup > 24 </ sup > years or so .</ ref >

However, the myosin head can hydrolyze ATP into adenosine diphosphate ( ADP ) and an inorganic phosphate ion.

However, in his paper he was wary of identifying the enzyme with the active ion movement, so he left out the term “ sodium-potassium pump ” from the title of his paper.

However, the first release candidate of Ion3 included a license change to a custom license based on the LGPL ( specifically modified versions must not use the name ion ).

However, depending on ion energy, sputtering of the reactor walls or the substrate may still occur.