Filter structure

Data Query using simple query structures (filters) can be built on field values or on coded and decoded information. 

It is clear that the multiplicities derived from DEPT90 and DEPT135 spectra play a key part in sub-structure filtering, particularly where they allow general constraints to become local constraints (i.e., assigned to a particular carbon). 

Spinodal decomposition usually results in two continuous phases. If one of these is etched away, the result is a porous structure. Filters of glass are produced this way. 

Structured catalysts are also essential in diesel exhaust gas purification. State-of-the-art solutions are marketed by PSA and by Johnson Matthey. The truck market is dominated by diesel engines. In that application, space requirement is a major issue, and intensification is badly needed. Space velocities exceeding 100,000 h 1 arc demanded. Reactive structured filters are the way to go. 

Jonikas, M. A., Radmer, R. J., et al. (2009). Coarse-grained modehng of large RNA molecules with knowledge-based potentials and structural filters. RNA 15(2), 189—199. 

Therefore, we again introduced appropriate structural filters and penalties to reduce the number of fragments employed in the generation of virtual library of cyclic ureas. 

When How What How Much The answers to all these questions are identical to those given above for primary libraries and will not be commented upon further. It is worth saying that any generic information that can be transformed into a structural filter to select valuable library components should be applied whenever possible. The cost of the library synthesis in terms of time and effort will not vary significantly when compared to a primary library. 

For the virtual screening, the Asinex, IBScreen and Maybridge vendor subsets were obtained from the ZINC site. In total, these databases contain 876 930 structures. After the normalization and structural pre-filtering steps, a focused screening subset of only 58 structures was obtained. We used somewhat relaxed structural filtering criteria in the hope of identifying possible distantly... 

Examples of structural filters implemented in the program REOS are listed in Table PIO... 

Morgan et al. Cationic Polymer Structure FILTER TIME (SEC.) VISCOSITY (CPS)... 

Number of rotatable bonds Structural filters <8 Reactive groups Warhead-containing agents Frequent hitters Promiscuous inhibitors <10... 

Any expected metabolites that have significantly lower nominal masses than the parent drugs can be used as core structure filter templates for searching for these metabolites and their derivatives from metabolic cleavage reactions. 

Adaptive FIR filter A finite impulse response structure filter with adjustable coefficients. The adjustment is controlled by an adaptation algorithm such as the least mean square (1ms) algorithm. They are used extensively in adaptive echo cancellers and equalizers in communication sytems. 

Nonfixed-pore structure filters depend principally on the filtration mechanisms of inertial impaction and/or diffusional interception to trap particles within the spaces of their internal structure. 

Most nonfixed-pore structure filters are subject to media migration. This means that parts of the filter medium become detached and continue to pass downstream, contaminating the effluent (fluid that has passed through the filter). Media migration is also sometimes incorrectly taken to include release of "built-in" contamination—for example, dust and fibers picked up by the filter during its manufacture. 

Fixed-pore structure filters are superior for most purposes when compared with the screen type. They combine high dirt capacity per unit area with both absolute removal of particles larger than a given size and minimum release of collected particles smaller than this rated size under impulse conditions. 

Nonfixed-pore structure filters do not have absolute ratings, are subject to media migration, and unload particles very badly on impulse. A comparison of dirt capacity between fixed-pore and nonfixed-pore depth filters is meaningless because the nominal removal ratings of nonfixed-pore structure filters bear little relationship to their behavior in service. 

The life of most screen and fixed-pore structure filters is greatly increased as their surface areas are increased. To understand why this is so, let us look at two filters of identical medium (thus subject to the same pressure drop limit) that pass the same fluid at the same flow rate. 

The filter selected must be able to retain particles removed from the subject fluid. Depth-type filters of the type whose pores can increase in size as pressure is increased are subject to unloading. With surface filters or fixed structure filters, one selects a medium that will not change its structure imder system-produced stress. 

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