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Page "Amino acid" ¶ 15
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At and pH
At pH values greater than the pKa of the carboxylic acid group ( mean for the 20 common amino acids is about 2. 2, see the table of amino acid structures above ), the negative carboxylate ion predominates.
At pH values lower than the pKa of the α-ammonium group ( mean for the 20 common α-amino acids is about 9. 4 ), the nitrogen is predominantly protonated as a positively charged α-ammonium group.
At a pH below their pI, proteins carry a net positive charge ; above their pI they carry a net negative charge.
At pH 4. 8, the interior of the lysosomes is acidic compared to the slightly alkaline cytosol ( pH 7. 2 ).
At high pH, sarin decomposes rapidly to nontoxic phosphonic acid derivatives.
At 25 ° C, considered the standard temperature, the pH value of a neutral solution is 7. 0.
At the same time, the separating part of the gel also has a pH value in which the buffer ions on average carry a greater charge, causing them to " outrun " the SDS-covered proteins and eliminate the ion gradient and thereby the stacking effect.
At the mean pH of the laryngopharynx ( pH
At high temperatures, the rate of collagen loss will be accelerated and extreme pH can cause collagen swelling and accelerated hydrolysis.
At a pH equal to the protonated base's pKa, the protonated ( ionized ) and unprotonated ( unionized ) forms of the molecule exist in equimolar amounts but only the unprotonated base diffuses readily across cell membranes.
At a lower pH, further chlorination occurs.
At a pH of 7, the enzymes that were present from the stomach are no longer active.
At all pH values other than their isoelectric point, proteins will be charged.
At pH < 5. 89 ( pH < pK < sub > 1 </ sub >) the hydrogen chromate ion is predominant in dilute solution but the dichromate ion is predominant in more concentrated solutions.
At pH 12-13, any ammonium ion in the sample is converted to ammonia gas and is ultimately detected by the electrode.
At this pH, most toxic metals become insoluble and precipitate, aided by the presence of recycled sludge.
At neutral pH, the dye absorbs red light most strongly and transmits blue light.
At low pH, the dye absorbs ultraviolet and blue light most strongly and appears yellow in solution.
At pH 7, glucose exists in solution in cyclic hemiacetal form as 63. 6 % β-D-glucopyranose and 36. 4 % α-D-glucopyranose, the proportion of linear and furanose form being negligible.
At the neutral pH outside of the cell the E2 envelope protein covers the E1 protein.
At high temperatures, above 24-27 ° C, the solvent melts and the salt dissociates, reversibly reacts with the weak acid and increases the pH.

At and values
At the top of Figure 5, for example, the Onset range and Completion range lines for the chosen growth center have been drawn for girls according to their mean and standard deviation values in Table 1.
At the exact midpoint between the two pKa values, the trace amount of net negative and trace of net positive ions exactly balance, so that average net charge of all forms present is zero.
At this apparent slight, R. Ḥiyya manifested chagrin, and R. Abbahu hastened to comfort him by comparing himself to the pedler of glittering fineries that always attracted the eyes of the masses, while his rival was a trader in precious stones, the virtues and values of which were appreciated only by the connoisseur.
At the other extreme of the spectrum one finds attempts to use coercion altruistically, as a pedagogical device to improve – in some supposedly objective sense – the way other people think, with particular regard to their basic attitudes and values.
At the 1860 Karlsruhe Congress on atomic weights, Cannizzaro resurrected Avogadro's ideas and used them to produce a consistent table of atomic weights, which mostly agree with modern values.
At the same time, the sector gears are returned to their original position, which causes them to increment the even column wheels back to their original values.
At the same time, Renaissance humanism, with its universal values and emphasis on scholarship ( as exemplified by Erasmus, the " prince of humanism "), had taken root in the country.
At the 1993 Conservative Party Conference, Major began the " Back to Basics " campaign, which he intended to be about the economy, education, policing, and other such issues, but it was interpreted by many ( including Conservative cabinet ministers ) as an attempt to revert to the moral and family values that the Conservative Party were often associated with.
At most, half the population have values strictly less than the median, and, at most, half have values strictly greater than the median.
At certain values of plate voltage and current, the tetrode characteristic curves are kinked due to secondary emission.
At intermediate values of power factor, the torques provided by the two coils add and the pointer takes up intermediate positions.
At the same time, Raeder worked to promote National Socialist ideology as opposed to the NSDAP in the Navy, ordering in September 1936 that all officers read a tract by Kriegsmarine Commander Siegfried Sorge called Der Marineoffizier about what it took to be a good officer., Sorge had claimed that one could not be a good naval officer without believing in National Socialist values.
At any rate, it would seem that the world has come far enough so that it is only by starting from relativism and its tolerations that we may hope to work out a new set of absolute values and standards, if such are attainable at all or prove to be desirable.
At one point, he reads aloud a long roster of the school's fallen alumni, and, defying the modern world he sees as soulless and lacking transcendent values of honour and friendship, dares to include the name of a German former master who has died fighting on the opposite side.
At the same time, corruption undermines the legitimacy of government and such democratic values as trust and tolerance.
At first the values of the Pharisees developed through their sectarian debates with the Sadducees ; then they developed through internal, non-sectarian debates over the law as an adaptation to life without the Temple, and life in exile, and eventually, to a more limited degree, life in conflict with Christianity.
At first the entire figure was painted in greyish-brown tones, with very little flesh colour, the whole blending perfectly with the greyish-brown of the prepared canvas ; then the entire background would be intensified a little ; then the figure made a little stronger ; then the background, and so on from day to day and week to week, and often from month to month .... And so the portrait would really grow, really develop as an entirety, very much as a negative under the action of the chemicals comes out gradually — light, shadows, and all from the very first faint indications to their full values.
At sufficiently high values of the applied field, ions are extracted from the cone tip by field evaporation or similar mechanisms, which then are accelerated to high velocities ( typically 100 km / s or more ).
At each step of the algorithm, the node with the lowest value is removed from the queue, the and values of its neighbors are updated accordingly, and these neighbors are added to the queue.
At certain values of plate voltage and current, the tetrode characteristic curves are kinked due to secondary emission

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