Selectivity reactants. Medical search. Frequent questions

The order of the reactants corresponds to the reactant order in the given reaction equation. (chemaxon.com)
The order of the reactants (reactant files) corresponds to the reactant order of the relevant reaction. (chemaxon.com)

primary} Reactor follows the visual order of the reactants in the reaction scheme (left to right, top to down) to process a reaction. (chemaxon.com)

Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product, in the process of regenerating the catalyst. (wikipedia.org)
The research team designed a high-pressure flow-electrolyzer device, which enriched the reactant molecular coverage on the catalyst surface. (nsfc.gov.cn)
He is first author on a paper describing the characteristics of a particular catalyst that determine its selectivity for converting CO 2 and ethane to either syngas or ethylene. (bnl.gov)
The activity and selectivity towards nitrogen and ammonia of this reaction is strongly affected by the temperature and concentration profile inside the catalyst particles, making this chemistry ideal for probing these polymer-coated catalysts. (utwente.nl)
The catalyst is crucial in FT processes and once the catalyst is deactivated there is a strong possibility that the activity and selectivity to the FT products will be affected. (confex.com)
Only limited results have been published on the formation rate and selectivity to olefins and paraffins separately during catalyst deactivation. (confex.com)
With the aim of understanding the effect of catalyst deactivation on the formation rate and selectivity of olefin and paraffin products separately during FTS, a group of experiments have been conducted using Co/TiO 2 catalyst in a fixed bed reactor. (confex.com)
More results, such as reactant reaction rate, product selectivity, Olefin/Paraffin ratios have been analysed, calculated and compared during the catalyst deactivation. (confex.com)
The highest selectivity of 2-pentylidenecyclopentanone, 91% at 31% conversion, was obtained at 130 °C after 2 h using amorphous aluminosilicate as a catalyst. (springer.com)
Using projection micro-stereolithography and other photochemical-based 3D printing processes at LLNL, the team designed and printed new housings for the reactors and rapidly iterated to optimize the geometry of the designs, which improved overall mass transport for delivering reactants to and removing products from the catalyst surroundings. (llnl.gov)
In homogeneous reactions, the toughest challenge is separating the catalyst from the reaction medium because the catalyst and the reactant have the same phase of matter. (pnnl.gov)
Lai, a postdoctoral researcher in the department and lead author of the publication, says a strong interaction between the catalyst metal site and the reactant (guaiacol or anisole) has been shown to block the reactive site and inhibit the activity for platinum (Pt)-catalyzed HDO. (uwyo.edu)
Additionally, the overlayer catalyst resulted in BTX selectivities exceeding 80 percent at lower catalyst weight to flowrate ratio than either pure Pt or Mo. (uwyo.edu)
The increase of both reaction rate and selectivity has resulted in a significantly improved HDO catalyst. (uwyo.edu)
Červený Libor, Kuncová Marcela, Vodová Barbora, Rüžička Vlastimil: Effect of catalyst composition on the selectivity of competitive hydrogenations of mono-olefinic reactants in the liquid state. (cas.cz)

SOR10-III catalysts showed higher SCR selectivity than SOR10-IV catalysts under the same conditions, especially at temperatures lower than 500oC. (aiche.org)
Discovering the underlying principles that determine the behavior of catalysts-the chemical "deal makers" that bring reactants together-could provide the key to more selective reactions. (bnl.gov)
Cross-condensation of valeraldehyde with cyclopentanone was investigated over heterogeneous Fe-CaO, CeO-MgO, FeO-CaO and CaO catalysts at 130 °C using cyclopentanone as a solvent and reactant. (springer.com)
For more than 40 years, an ambition of catalysis science has been to persuade homogeneous catalysts to behave more like heterogeneous catalysts, while still maintaining their activity and exquisite selectivity. (pnnl.gov)
Solid phase heterogeneous catalysts, on the other hand, are easier to separate from the reactant, which may be a liquid or a gas. (pnnl.gov)
Finding the solution to the separation problem for homogeneous catalysts, while still maintaining high catalytic activity and product selectivity, is a major challenge that limits their wide-spread use in industrial applications. (pnnl.gov)
Pore size and surface area are crucial properties in catalysts because they affect the catalytic activity and selectivity. (fwo.com.my)
These tools provide valuable information on the physical properties of catalysts, which, in turn, affects their catalytic activity and selectivity. (fwo.com.my)
These phenomena were hypothesized to contribute to the superior selectivity to 1, 3-PDO over 1, 2-PDO of the supported Pt-WO x catalysts when compared with the corresponding supported Pt catalysts. (pku.edu.cn)
The realized superior 1, 3-PDO selectivity was consistent with its higher stability on the Pt-WO x catalysts, as reflected by the lower reaction rate constant of 1, 3-PDO than those of 1, 2-PDO and glycerol obtained in their hydrogenolysis reactions. (pku.edu.cn)
Scientists are learning that certain catalysts may enable greater control of reactions and perform with exceptional efficiency and potent selectivity when the reaction is carried out 'undercover', that is, in a confined molecular space. (lu.se)

The conformation change of the polymer could allow to locally adjust the molecular diffusion of reactants, thereby changing the catalytic activity autonomously. (utwente.nl)

Limiting and excess reactants. (ipt.pt)

Besides selecting reactions, Reactor users should also provide their reactant molecule(s). (chemaxon.com)
Choosing appropriate reactions and conditions to achieve the desired chemical transformations, considering factors like reaction efficiency, selectivity, and scalability. (popherald.com)

The input file(s)or string(s) provide the reactant molecules. (chemaxon.com)
Copper is the only known element that can grant electrocatalysts with the ability to produce major amount of multi-carbon molecules, but it also suffers low selectivity when it comes to targeting one from over twenty possible products. (nsfc.gov.cn)
Reactants can come from molecular files , but direct input is also available by drawing molecules . (chemaxon.com)
primary} If the number of reactant molecules matches the number of reactant molecules in the reaction equation then a single reaction is processed with the specified reactants. (chemaxon.com)
The synthesis of molecules in a liquid solution, enabling efficient mixing and reactivity between the reactants. (popherald.com)

In Membrane Reactors: Distributing Reactants to Improve Selectivity and Yield (pp. 193-233). (mpg.de)
Yield and selectivity. (ipt.pt)

Increasing temperature and pressure decreased the CO 2 /CH 4 and N 2 /CH 4 selectivities, but the H 2 /CH 4 selectivity was constant up to 470 K, and decreased to 3.4 at 520 K. The temperature dependence of the CO 2 /CH 4 and N 2 /CH 4 selectivities is consistent with separation by competitive adsorption. (mrs.org)

Catalysis may be classified as either homogeneous , whose components are dispersed in the same phase (usually gaseous or liquid) as the reactant, or heterogeneous , whose components are not in the same phase. (wikipedia.org)
Chemists have strategically designed COFs for the purpose of heterogeneous catalysis of gaseous reactants. (frontiersin.org)

Membrane Reactors: Distributing Reactants to Improve Selectivity and Y. (kennys.ie)

If the number of reactants exceeds the number of reactants required by the reaction equation then one input file is taken in place of each reactant. (chemaxon.com)

However, the excessively small copper sites need higher reactant molecular coverage to complete C-C coupling. (nsfc.gov.cn)
These idealized systems demonstrate that thermo-responsive materials can be used to control molecular transport of reactants. (utwente.nl)

At the same time, the high pressure can accelerate the material transport rate at the reaction interface, thus reduce the energy barrier in the reaction process, and achieve the purpose of improving the selectivity of acetate products and the energy efficiency of the system. (nsfc.gov.cn)
This work has realized a sustainable process, which converts carbon dioxide into acetate through carbon monoxide in two steps by using renewable electricity, and has realized zero-carbon green production of acetate, and achieved high selectivity and high energy efficiency. (nsfc.gov.cn)

Every electrochemical reaction is accompanied by the exchange of electrons between reactants and electrodes, and the conventional electrochemical methods, including SECM, detect the electrons. (phys.org)

Chemical reactants are introduced to the substrate in separate steps isolated by purges with a non-reactive gas, as depicted in the simple schematic below. (nasa.gov)
The CO2RR reaction is as a useful way of breaking down CO2 as it produces valuable products in the process, in the form of formic acid (HCOOH) and formate (HCOO-), which are useful reactants in other chemical processes. (electropages.com)
These NDIR gas sensors work without moving parts or chemical reactants. (eoc-inc.com)

Červený L., Kuncová M., Ruzicka V.: Effect of composition of the solvent on the selectivity of competitive hydrogenation of 2-methyl-3-butene-2-ol and 1-hexene. (cas.cz)

95% for PG and 84% for methanol) and selectivity of products. (osti.gov)
For each combination, they examined how the metals come together and measured how the mix of reactants and products changes during the reaction. (bnl.gov)
The tert-butyl carbocation virtually always goes on to products and never back to reactants because the barrier to the back reaction is significantly larger than the small barrier to the forward reaction which gives the products. (utexas.edu)
The trick is to detect the conversion of the reactant into reaction products associated with the exchange of electrons. (phys.org)

Preliminary test on the sensing properties of the nanocomposite thick films were carried on by measuring the temporal variation of the electrical resistance in presence of NO 2 , CO and CO 2 , at a working temperature of 200°C. Rather high sensitivity towards NO 2 detection and selectivity to CO and CO 2 in the presence of water vapors was found for samples obtained at higher laser power density. (hindawi.com)
The TS of a reaction step more closely resembles the higher energy partner (reactant or product of that step). (utexas.edu)
Unlike conventional polymeric membranes, porous silica membranes with higher permeance and selectivity are applicable at high wellhead pressures and do not suffer from CO 2 plasticization, representing an alternative for CO 2 /CH 4 separation. (mrs.org)

Reactants are processed according to either sequential or combinatorial mode. (chemaxon.com)

Oleum was used as one reactant and cyclohexanecarboxylic acid diluted by n-hexane was used as the other. (aiche.org)
High selectivity for the determination of mandelic acid was achieved compared to metal ions, amino acids, and sugars that commonly coexist with it. (bvsalud.org)

The methodcombines the spatial resolution of optical detection with the high sensitivity and selectivity of electrochemical recognition. (phys.org)
It is noteworthy that this integrated system demonstrated desirable selectivity even in the presence of similar biomolecules, showcasing its robust performance and rapid detection capability. (bvsalud.org)

The room temperature CO 2 /CH 4 composition based selectivity was 5.5 at 270 kPa feed pressure with a 138 kPa pressure drop. (mrs.org)

The approach to preparation must be examined in activity and selectivity, that both depend on the atom arrangement at a scale smaller than 0.02 nm. (researchsquare.com)
The highest reaction activity and 1, 3-PDO selectivity were achieved at a WO x density of approximately 1.5-2.0 W·nm −2 , with all three support materials. (pku.edu.cn)

With unstabilised ylides (R3 = alkyl) this results in (Z)-alkene product with moderate to high selectivity. (wikipedia.org)

The last step is strongly exothermic, so the TS more closely resembles the reactant of that step. (utexas.edu)

Addition of dopants decreases the film resistance and induces selectivity in sensor response [ 12 ]. (hindawi.com)

Optimizing the selectivity and degree to which photons are absorbed or rejected requires further surface and interface engineering. (nasa.gov)
sufficient access of reactants to the surface must be prepared. (researchsquare.com)
Pore size determines the accessibility of the reactants to the active sites, while surface area influences the number of active sites. (fwo.com.my)

The (E)/(Z) selectivity is often poor with semistabilized ylides (R3 = aryl). (wikipedia.org)

In this work, the selectivity of acetate is as high as 91%, and it can still be maintained above 80% in a wide potential window. (nsfc.gov.cn)

The rate constant, k, is the rate of a reaction at unit concentrations of all reactants. (utexas.edu)
Consequently, the change in conformation resulted in a decrease on the reaction rate, due to the partial blockage of the diffusion path of the reactants. (utwente.nl)

The IR laser-induced pyrolysis from gas-phase reactants was used as synthesis technique [ 16 ]. (hindawi.com)

Having decided to bring the selectivity of acetate to near-unity in CO reduction, the research team saught to stabilize the key intermediate of acetate formation, the monodentically bound *C=C=O group on an atomically small copper site dispersed in a non-copper host. (nsfc.gov.cn)

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Corresponds to the reactant order2

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