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As an example, threading the host molecules onto the polymer is one of the commonly used strategies for increasing the mechanical properties of the polymer. It takes time for the host molecules to de-thread from the polymer, which can be a way of energy dissipation. [33] [39] [40] Another method is to use the slow exchange host-guest ...
The choice of reservoir depends on the problem; for example, the ocean may be a single reservoir or be split into multiple reservoirs. [20] In a type of model called a box model, a reservoir is represented by a box with inputs and outputs. [1]: 81 [20] Geochemical models generally involve feedback.
Some of the key disciplines used in reservoir analysis are the fields of structural analysis, stratigraphy, sedimentology, and reservoir engineering. The seal, or cap rock, is a unit with low permeability that impedes the escape of hydrocarbons from the reservoir rock. Common seals include evaporites, chalks and shales. Analysis of seals ...
The reservoir contains the amount of material M under consideration, as defined by chemical, physical or biological properties. The source Q is the flux of material into the reservoir, and the sink S is the flux of material out of the reservoir. The budget is the check and balance of the sources and sinks affecting material turnover in a reservoir.
Weak Ligand Method. In the weak link method, a hemilabile ligand is used: a weak metal-heteroatom bond is the 'weak link.' The formation of the complexes is driven by favorable π-π interactions between the spacers and the ligands, as well as the chelation of the metal.
Static molecular recognition is likened to the interaction between a key and a keyhole; it is a 1:1 type complexation reaction between a host molecule and a guest molecule to form a host–guest complex. To achieve advanced static molecular recognition, it is necessary to make recognition sites that are specific for guest molecules.
The study also found climate change could increase exposure. Lakes and rivers shrink during drought, but the amount of wastewater humans produce does not, Ruyle said.
Reservoir sampling is a family of randomized algorithms for choosing a simple random sample, without replacement, of k items from a population of unknown size n in a single pass over the items. The size of the population n is not known to the algorithm and is typically too large for all n items to fit into main memory .