于是有了BASE理论。 BASE 理论 eBay的架构师Dan Pritchett源于对大规模分布式系统的实践总结,在ACM上发表文章提出BASE理论,BASE理论是对CAP理论的延伸,核心思想是即使无法做到强一致性(StrongConsistency,CAP的一致性就是强一致性),但应用可以采用适合的方式达到最终一致性(Eventual Consitency)。 (Basically Available)基...
Acid-base equilibrium is important because almost all cellular biochemical reactions take place in the aqueous phase. The concentration of hydrogen ions (the pH) in the various fluid compartments controls, among other things, the conformation of proteins and the feasibility and speed of all the reac...
The molarity of a solution is defined as the number of moles of solute per liter of solution. Molarity facilitates easy dilution of a solution using the dilution formula, where the initial concentration multiplied by the initial volume equals the final concentration multiplied by the final volume ...
(a very lowvaluefor carboxyls). The pKa of a group is thepHvalue at which the concentration of the protonated group equals that of the unprotonated group. Thus, at physiological pH (about 7–7.4), the free amino acids exist largely as dipolarionsor “zwitterions” (German for “hybrid ...
the “3, 4, 6 Estimation Rule”. Methanol equals 3 (for every 100mg/dL of methanol, the OG increases by 30), ethanol equals 4 (for every 100mg/dL of ethanol, the OG increase by 40) and ethylene glycol and isopropyl alcohol equal 6 (for every 100mg/dL, the OG ...
(a very lowvaluefor carboxyls). The pKa of a group is thepHvalue at which the concentration of the protonated group equals that of the unprotonated group. Thus, at physiological pH (about 7–7.4), the free amino acids exist largely as dipolarionsor “zwitterions” (German for “hybrid ...
VCG defined LW as the Lifshitz-van der Waals component consisting of d, o and i contributions, thus, surface tension, , equals ab(VCG)+LW. Both Fowkes and VCG assumed that the polar interactions for a liquid on a low energy surface are negligible.doi:10.1080/00218460108029623...
if (keepaliveNode.getStatus().equals(STAT_CHALLENGE)) stateMechine = Status.HEARTBEAT; else { stateMechine = Status.CHALLENGE_MASTER; takeRest = 0; } } else if (keepaliveNode.getUniqueID().equals(uniqueID)) { // I'am restart
(a very lowvaluefor carboxyls). The pKa of a group is thepHvalue at which the concentration of the protonated group equals that of the unprotonated group. Thus, at physiological pH (about 7–7.4), the free amino acids exist largely as dipolarionsor “zwitterions” (German for “hybrid ...
At this point, the number of moles of acid equals the number of moles of base. Strong Base: an ionic compound that completely dissociates in solution to yield OH− ions in solution. Weak Acid: a chemical compound that only partially dissociates in solution to yield some ...