The catalyst may increase reaction rate or selectivity, or enable the reaction at lower temperatures.

The inhibitor may modify selectivity in addition to rate.

These techniques may also be utilized for space diversity ( improved robustness to fading ) or beamforming ( improved selectivity ) rather than multiplexing.

A dual-conversion receiver may have two intermediate frequencies, one higher one to improve image rejection and a second, lower one, for desired selectivity.

Therefore greater GPCR selectivity may be obtained by targeting allosteric sites.

An allosteric modulator may display neutral co-operativity with an orthosteric ligand at all subtypes of a given receptor except the subtype of interest, which is termed " absolute subtype selectivity ".

Therefore other methods may be used to increase selectivity, such as Q multiplier circuits and regenerative receivers.

The ar / R ( aromatic / arginine ) selectivity filter is a cluster of amino acids that help bind to water molecules and exclude other molecules that may try to enter the pore.

For the above example, kinetic control may be established with LDA at − 78 ° C, giving 99: 1 selectivity of kinetic: thermodynamic enolate, while thermodynamic control may be established with triphenylmethyllithium at room temperature, giving 10: 90 selectivity.

This allows the dragline operator to have much greater selectivity in when to pick up the bucket, and in how the bucket may be dumped.

Using the structure of the biological target, candidate drugs that are predicted to bind with high affinity and selectivity to the target may be designed using interactive graphics and the intuition of a medicinal chemist.

The discovery of functional selectivity and that ligand-specific receptor conformations occur and can affect interaction of receptors with different second messenger systems may mean that drugs can be designed to activate some of the downstream functions of a receptor but not others.

The various connexins have been observed to combine into both homomeric and heteromeric gap junctions, each of which may exhibit different functional properties including pore conductance, size selectivity, charge selectivity, voltage gating, and chemical gating.

The problem may be as simple as masking the taste or odor of the core, or as complex as increasing the selectivity of an adsorption or extraction process.

Functional selectivity posits that a ligand may inherently produce a mix of the classic characteristics through a single receptor isoform depending on the effector pathway coupled to that receptor.

The Thorpe-Ingold effect may also be exploited to improve both reaction rates and product selectivity.

In another case, the selectivity may be more important, and a reduced rate of extraction will be preferable if it provides greater discrimination.

In addition to their selectivity for different gases, zeolites and some types of activated carbon called carbon molecular sieves may utilize their molecular sieve characteristics to exclude some gas molecules from their structure based on the size of the molecules, thereby restricting the ability of the larger molecules to be adsorbed.

In addition, synthetic SPRMs may have some binding selectivity between the two isoforms, although this is unlikely as the ligand binding domains of the two isoforms are identical.

This allows the index to remain small, even though the table may be rather large, and have extreme selectivity.

Undergraduate admission selectivity also increased, with the acceptance rate dropping from 13 % for the class of 2004 to 6 % for the class of 2016.

As such, this is one of the most highly sought and rigorous programs with very high selectivity ( low acceptance rate ).

NYU Abu Dhabi recruited an outstandingly strong first freshman class, which was notable for its selectivity ( 189 students were accepted out of 9, 048 applicants worldwide ( an acceptance rate of 2. 1 percent ), with a 79. 4 percent yield ), its geographic diversity ( the class of 150 students will include students from 39 countries on six continents ), and the academic qualifications of its students ( at the classes ’ 75th percentile, the SAT critical reading score was 770 ( ranking it fifth among US universities ) and the math score was 780 ( ranking it sixth ); the median SAT score ( on the 1600 scale ) was 1470 ).

Mission schools set up by various Christian denominations paralleled the selective state school albeit not with the same degree of selectivity.

Christians explain that such selectivity is based on rulings made by early Jewish Christians in the Book of Acts, at the Council of Jerusalem, that, while believing gentiles did not need to fully convert to Judaism, they should follow some aspects of Torah like avoiding idolatry and fornication and blood, including, according to some interpretations, homosexuality.

This has an important impact on the selectivity of the distillation and allows a chemist to optimize a process such that fewer extremes of pressure and temperature are required and less energy is consumed.

The IF amplifier ( or IF strip ) can be made highly selective around its center frequency f < small >< sub > IF </ sub ></ small >, whereas achieving such a selectivity at a much higher RF frequency would be much more difficult.

Biblical scholar Thomas L. Thompson notes that the methods of " biblical archaeology " have also become outmoded: " and Albright's historical interpretation can make no claim to be objective, proceeding as it does from a methodology which distorts its data by selectivity which is hardly representative, which ignores the enormous lack of data for the history of the early second millennium, and which wilfully establishes hypotheses on the basis of unexamined biblical texts, to be proven by such ( for this period ) meaningless mathematical criteria as the ' balance of probability ' ..."

There are a number of " fixes ", such as tying a rope around the " cod-end " to prevent the mesh from opening fully, which have been developed to work around technical regulation of size selectivity.

# Allows for chemical communication between cells, through the transmission of small second messengers, such as inositol triphosphate ( IP < sub > 3 </ sub >) and calcium ( Ca < sup > 2 +</ sup >), although different connexin subunits can impart different selectivity for particular small molecules.

Its difficulty and selectivity could vary between disciplines: there are about 300 such positions open each year in mathematics, but a few dozen in philosophy, and perhaps one in some rarely taught foreign languages such as Japanese.

This ion selectivity is seen in other macrocyclic ligands such as the cyclic ionophore valinomycin, which is also an antibiotic, and crown ethers.

Chalcogenide glass also has selectivity for double-charged metal ions, such as Pb < sup > 2 +</ sup >, and Cd < sup > 2 +</ sup >.

Human Rights Watch called on the Council to avoid the selectivity that discredited its predecessor and urged it to hold special sessions on other urgent situations, such as that in Darfur.

This gives a selectivity ogive that is skewed towards medium sized fishes, unlike active gears such as trawling, in which the proportion of fish entering the net that are retained increases with length.

The selectivity to iso-aldehyde is high and by-products such as alcohols, esters and higher boiling fractions are hardly formed.

Mixed micelle systems, such as the one formed by combining SDS with the neutral surfactant Brij-35, can also be used to alter the selectivity of MEKC.

At Cambridge-based KLH, Kloss continued to build speakers such as the classic KLH Model Five and Six, and produced one of the first small FM radios with high selectivity, the Model Eight.

One such challenge is selectivity of complexes in vivo.

Most current oncolytic viruses are engineered for tumour selectivity, though there are a few naturally occurring ones such as the Seneca Valley virus.

While this has solved certain problems, membranes have their own particular limitations, such as with true selectivity, clogging and, more undetectably, they provide secondary sites for other chemical reactions, which are prone to display “ false negatives ,” a condition far more severe than “ false positives ” in critical applications.

Use of glutamate antagonists presents a huge obstacle in that the treatment much overcome selectivity such that binding is only inhibited when excitotoxicity is present.