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1,294 results for “reactions”
Catalytic reactors with enhanced chemical conversion behavior for conducting simultaneous endothermic and exothermic reactions
<p><strong>Catalytic reactors with enhanced chemical conversion behavior for conducting simultaneous endothermic and exothermic reactions</strong></p> <p>Junjie Chen</p> <p>Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com</p> <p> </p> <p>It has been taught methods which may be used to transform a monolithic structure into a co-current or countercurrent flow heat exchanger. The monolith is transformed by cutting or grinding the uppermost section of diving walls from rows of channels contained in the honeycomb. The top end of the newly formed groove is then sealed with suitable cement. The depth of the sealant is such that an opening still exists in the side wall of the structure. A manifold is attached to this inlet. A similar exercise is performed at the opposing end to produce an outlet section. Hot gas is passed through the inlet whilst cold coolant is passed through the open end. Efficient heat transfer occurs between the two streams. However, the possibility of using such an arrangement for coupling endothermic and exothermic catalytic processes on opposing sides of each dividing wall is not taught. It has been taught a method to efficiently transfer energy through a divider by contacting a catalyst to the wall and performing an exothermic reaction there. The energy is conducted through the wall and used to heat a gas stream on the opposing side of the wall. An apparatus is described where multiple layers are formed with alternating hot and cold channels to produce a gas heater. However, the method does not discuss the possibility of utilizing this concept for thermally coupling endothermic and exothermic reactions within a monolith reactor.</p> <p>Streamwise distance (meter), Heterogeneous reaction rate along the length of the reactor (mole per square meter per second)</p> <p>0 1.88478</p> <p>0.00025 1.92635</p> <p>0.0005 2.0243</p> <p>0.00075 2.14121</p> <p>0.001 2.26285</p> <p>0.00125 2.38391</p> <p>0.0015 2.5016</p> <p>0.00175 2.61386</p> <p>0.002 2.71933</p> <p>0.00225 2.81695</p> <p>0.0025 2.9061</p> <p>0.00275 2.98659</p> <p>0.003 3.05831</p> <p>0.00325 3.12146</p> <p>0.0035 3.17647</p> <p>0.00375 3.22385</p> <p>0.004 3.26403</p> <p>0.00425 3.29778</p> <p>0.0045 3.32579</p> <p>0.00475 3.34828</p> <p>0.005 3.36585</p> <p>0.00525 3.37923</p> <p>0.0055 3.38901</p> <p>0.00575 3.39569</p> <p>0.006 3.39964</p> <p>0.00625 3.40142</p> <p>0.0065 3.40139</p> <p>0.00675 3.39974</p> <p>0.007 3.39685</p> <p>0.00725 3.39304</p> <p>0.0075 3.38846</p> <p>0.00775 3.38332</p> <p>0.008 3.37786</p> <p>0.00825 3.37216</p> <p>0.0085 3.36657</p> <p>0.00875 3.36135</p> <p>0.009 3.35646</p> <p>0.00925 3.35185</p> <p>0.0095 3.34767</p> <p>0.00975 3.34403</p> <p>0.01 3.3408</p> <p>0.01025 3.33803</p> <p>0.0105 3.33572</p> <p>0.01075 3.33405</p> <p>0.011 3.33301</p> <p>0.01125 3.33242</p> <p>0.0115 3.33227</p> <p>0.01175 3.33256</p> <p>0.012 3.33329</p> <p>0.01225 3.33451</p> <p>0.0125 3.33619</p> <p>0.01275 3.33825</p> <p>0.013 3.34069</p> <p>0.01325 3.34347</p> <p>0.0135 3.34647</p> <p>0.01375 3.34978</p> <p>0.014 3.35347</p> <p>0.01425 3.35729</p> <p>0.0145 3.36123</p> <p>0.01475 3.36531</p> <p>0.015 3.36946</p> <p>0.01525 3.37365</p> <p>0.0155 3.37777</p> <p>0.01575 3.38195</p> <p>0.016 3.38636</p> <p>0.01625 3.39101</p> <p>0.0165 3.3956</p> <p>0.01675 3.40005</p> <p>0.017 3.40456</p> <p>0.01725 3.40915</p> <p>0.0175 3.41362</p> <p>0.01775 3.41806</p> <p>0.018 3.42267</p> <p>0.01825 3.42714</p> <p>0.0185 3.43145</p> <p>0.01875 3.43582</p> <p>0.019 3.44022</p> <p>0.01925 3.44451</p> <p>0.0195 3.44872</p> <p>0.01975 3.45302</p> <p>0.02 3.45739</p> <p>0.02025 3.46153</p> <p>0.0205 3.46548</p> <p>0.02075 3.4695</p> <p>0.021 3.47355</p> <p>0.02125 3.47744</p> <p>0.0215 3.4811</p> <p>0.02175 3.48467</p> <p>0.022 3.48808</p> <p>0.02225 3.49137</p> <p>0.0225 3.49463</p> <p>0.02275 3.49784</p> <p>0.023 3.50085</p> <p>0.02325 3.50358</p> <p>0.0235 3.50617</p> <p>0.02375 3.50872</p> <p>0.024 3.51116</p> <p>0.02425 3.51353</p> <p>0.0245 3.51592</p> <p>0.02475 3.51817</p> <p>0.025 3.52004</p> <p>0.02525 3.52161</p> <p>0.0255 3.52305</p> <p>0.02575 3.52439</p> <p>0.026 3.52547</p> <p>0.02625 3.52614</p> <p>0.0265 3.52658</p> <p>0.02675 3.5265</p> <p>0.027 3.52593</p> <p>0.02725 3.5252</p> <p>0.0275 3.52428</p> <p>0.02775 3.52285</p> <p>0.028 3.52091</p> <p>0.02825 3.51866</p> <p>0.0285 3.51596</p> <p>0.02875 3.51277</p> <p>0.029 3.50899</p> <p>0.02925 3.5048</p> <p>0.0295 3.4992</p> <p>0.02975 3.4806</p> <p>0.03 3.46548</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p>
Microchannel steam reforming reactors with enhanced heat transfer for conducting simultaneous endothermic and exothermic reactions
<p><strong>Microchannel steam reforming reactors with enhanced heat transfer for conducting simultaneous endothermic and exothermic reactions</strong></p> <p>Junjie Chen</p> <p>Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com</p> <p> </p> <p>It has been described a compact multiple tube steam reformer. The design consists of multiple packed tubes, of small diameter, being placed in intimate contact with a heat generating flame. The arrangement leads to improved heat transfer and therefore chemical conversion. However, the packed tube results in a significant pressure drop and the author states the process is still heat transfer limited. Therefore, a reactor design which minimizes the process side pressure drop and does not suffer from heat transfer limitation is required. It has been described a method to modify a monolithic structure into a combined heat exchanger reactor. The method describes the mechanical process to transform the structure into a structure consisting of two discrete volumes. It is proposed that the arrangement can either be used as a heat exchanger, where energy is transferred from one stream to another via conduction through the wall or it is suitable as a chemical reactor where the second set of channels allow the introduction of a heat transfer fluid. In the second case, the energy required or generated through the reaction is removed via a heat transfer fluid in the second channel. It is noted that the reaction can be a catalytic process and the catalytically active material can be coated onto the monolith passage walls to minimize pressure drop. In this arrangement, the heat transfer from the process catalyst to the dividing wall will be highly efficient, however, the uptake of the energy by the heat transfer fluid will suffer from all of the limitations of traditional heat transfer operations. In this case, the boundary layer will provide a significant resistance to heat transfer and will severely limit the rate of the process. Also, for this arrangement to successfully supply or remove heat and maintain a near isothermal longitudinal profile considerable heat transfer fluid velocities must be utilized. The high velocities will reduce the characteristic thickness of the boundary layer and ensure that a sufficient mass of heat transfer fluid is available to absorb the heat of reaction without significantly changing temperature. These requirements will lead to excessive pressure drop through the coolant channels. Therefore, a reactor design which minimizes the heat transfer fluid side pressure drop is required. The method does not teach about combining endothermic and exothermic reactions on opposing sides of dividing walls of adjacent channels as an efficient method of heat transfer.</p> <p>Streamwise distance (meters), Heat flux (watts per square meter)</p> <p>0 28082.8</p> <p>0.00025 139648</p> <p>0.0005 111616</p> <p>0.00075 93312</p> <p>0.001 81920</p> <p>0.00125 74112</p> <p>0.0015 68096</p> <p>0.00175 62976</p> <p>0.002 58752</p> <p>0.00225 55168</p> <p>0.0025 52096</p> <p>0.00275 49152</p> <p>0.003 46336</p> <p>0.00325 44032</p> <p>0.0035 41984</p> <p>0.00375 40064</p> <p>0.004 38400</p> <p>0.00425 36864</p> <p>0.0045 35328</p> <p>0.00475 33920</p> <p>0.005 32512</p> <p>0.00525 31360</p> <p>0.0055 30336</p> <p>0.00575 29184</p> <p>0.006 28288</p> <p>0.00625 27392</p> <p>0.0065 26496</p> <p>0.00675 25728</p> <p>0.007 24832</p> <p>0.00725 24192</p> <p>0.0075 23680</p> <p>0.00775 23040</p> <p>0.008 22400</p> <p>0.00825 21760</p> <p>0.0085 21376</p> <p>0.00875 21120</p> <p>0.009 20608</p> <p>0.00925 20224</p> <p>0.0095 19968</p> <p>0.00975 19456</p> <p>0.01 19072</p> <p>0.01025 18688</p> <p>0.0105 18432</p> <p>0.01075 18176</p> <p>0.011 17920</p> <p>0.01125 17792</p> <p>0.0115 17536</p> <p>0.01175 17280</p> <p>0.012 17024</p> <p>0.01225 16768</p> <p>0.0125 16640</p> <p>0.01275 16512</p> <p>0.013 16384</p> <p>0.01325 16256</p> <p>0.0135 16128</p> <p>0.01375 16000</p> <p>0.014 15872</p> <p>0.01425 15744</p> <p>0.0145 15488</p> <p>0.01475 15488</p> <p>0.015 15360</p> <p>0.01525 15104</p> <p>0.0155 15104</p> <p>0.01575 14976</p> <p>0.016 14848</p> <p>0.01625 14720</p> <p>0.0165 14720</p> <p>0.01675 14720</p> <p>0.017 14592</p> <p>0.01725 14336</p> <p>0.0175 14336</p> <p>0.01775 14464</p> <p>0.018 14336</p> <p>0.01825 14336</p> <p>0.0185 14336</p> <p>0.01875 14208</p> <p>0.019 14080</p> <p>0.01925 14080</p> <p>0.0195 14080</p> <p>0.01975 14080</p> <p>0.02 13952</p> <p>0.02025 13824</p> <p>0.0205 13824</p> <p>0.02075 13952</p> <p>0.021 13952</p> <p>0.02125 13824</p> <p>0.0215 13696</p> <p>0.02175 13568</p> <p>0.022 13568</p> <p>0.02225 13696</p> <p>0.0225 13696</p> <p>0.02275 13440</p> <p>0.023 13312</p> <p>0.02325 13440</p> <p>0.0235 13440</p> <p>0.02375 13312</p> <p>0.024 13312</p> <p>0.02425 13312</p> <p>0.0245 13312</p> <p>0.02475 13184</p> <p>0.025 13056</p> <p>0.02525 13056</p> <p>0.0255 13056</p> <p>0.02575 12800</p> <p>0.026 12672</p> <p>0.02625 12800</p> <p>0.0265 12672</p> <p>0.02675 12544</p> <p>0.027 12544</p> <p>0.02725 12288</p> <p>0.0275 12160</p> <p>0.02775 12160</p> <p>0.028 12032</p> <p>0.02825 12032</p> <p>0.0285 11904</p> <p>0.02875 11776</p> <p>0.029 11648</p> <p>0.02925 11520</p> <p>0.0295 11392</p> <p>0.02975 11008</p> <p>0.03 10624</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p>
Reaction Optimizer Spreadsheet tool
<p>Synergistic data analysis tool for green chemistry. Includes visual kinetic analysis (variable time normalization analysis), a linear solvation energy relationship calculator to determine solvent effects, and green chemistry metrics.</p>
Simulation data associated to the manuscript "Controlling the Hydrophilicity of the Electrochemical Interface to Modulate the Oxygen-Atom Transfer in Electrocatalytic Epoxidation Reactions"
<p>Contains input files used to perform the simulations of the article:</p> <p>Controlling the Hydrophilicity of the Electrochemical Interface to Modulate the Oxygen-Atom Transfer in Electrocatalytic Epoxidation Reactions</p> <p>Florian Dorchies, Alessandra Serva, Dorian Crevel, Jérémy de Freitas, Nikolaos Kostopoulos, Marc Robert, Ozlem Sel, Mathieu Salanne and Alexis Grimaud<br> *ChemRxiv*, 2022</p> <p>https://doi.org/ 10.26434/chemrxiv-2022-wjsbs-v2</p> <p>Each folder contains 2 input files for MetalWalls, which is available [here](https://gitlab.com/ampere2/metalwalls). The corresponding systems are the following:</p> <ul> <li>Bulk liquids: <ul> <li>Acetonitrile - water - LiClO4</li> <li>Acetonitrile - water - LiClO4 with cyclooctene</li> <li>Acetonitrile - water - TBAClO4</li> <li>Acetonitrile - water - TBAClO4 with cyclooctene</li> </ul> </li> <li>Liquids in contact with gold electrodes: <ul> <li>Acetonitrile - water - LiClO4</li> <li>Acetonitrile - water - LiClO4 with cyclooctene</li> <li>Acetonitrile - water - TBAClO4</li> <li>Acetonitrile - water - TBAClO4 with cyclooctene</li> </ul> </li> </ul>
Data for figures in "Observation of resonances in the transition state region of the F + NH3 reaction using anion photoelectron spectroscopy"
<p>Data for all figures in "Observation of resonances in the transition state region of the F + NH3 reaction using anion photoelectron spectroscopy" and the accompanying supporting information, a manuscript accepted by Nature Chemistry.</p>
Fibroblasts reaction to 1 and 3 µM ML-7
<p>Healthy (HF), scar (SF) and Dupuytren (DF) fibroblasts videos showing how cells reacted to 1 and 3 µM ML-7 addition.</p>
Uncovering bacterial hosts of class 1 integrons in an urban coastal aquatic environment with a single-cell fusion-polymerase chain reaction technology
<p>Horizontal gene transfer (HGT) is a key driver of bacterial evolution via transmission of genetic materials across taxa. Class 1 integrons are genetic elements that correlate strongly with anthropogenic pollution and contribute to the spread of antimicrobial resistance (AMR) genes via HGT. Despite their significance to human health, there is a shortage of robust, culture-free surveillance technologies for identifying uncultivated environmental taxa that harbour class 1 integrons. We developed a modified version of epicPCR (emulsion, paired isolation and concatenation PCR) that links class 1 integrons amplified from single bacterial cells to taxonomic markers from the same cells in emulsified aqueous droplets. Using this single-cell genomic approach and Nanopore sequencing, we successfully assigned class 1 integron gene cassette arrays containing mostly AMR genes to their hosts in coastal water samples that were affected by pollution. Our work presents the first application of epicPCR for targeting variable, multi-gene loci of interest. We also identified the <em>Rhizobacter</em> genus as novel hosts of class 1 integrons. These findings establish epicPCR as a powerful tool for linking taxa to class 1 integrons in environmental bacterial communities and offer the potential to direct mitigation efforts towards hotspots of class 1 integron-mediated dissemination of AMR.</p>
An approach for modelling simultaneous fluid-phase and chemical reaction equilibria in multicomponent systems via Lagrangian duality: The reactive HELD algorithm.
<p>This is a data set associated with the paper <em>An approach for modeling simultaneous fluid-phase and chemical reaction equilibria in multicomponent systems via Lagrangian duality: The reactive HELD algorithm. </em>by Felipe A. Perdomo, George Jackson, Amparo Galindo, Claire S. Adjiman. The manuscript is presented as a proceeding of the 33<sup>rd</sup> European Symposium on Computer-Aided Process Engineering (ESCAPE33), June 18-21, 2023, in Athens, Greece.</p>
Normative behavioral data from the novel One Trail Trace escape reaction task (OTTER)
<p><span>We designed a behavioral task where rats learn to associate two temporally distinct but close-in-time events by means of incidental one-trial learning. </span><span>The task takes advantage of two competing motivations - to avoid light places and to avoid painful stimuli (foot shock) predicted by an acoustic signal. Motivation to avoid a bright light is constant throughout the experiment and is manifested by rats preferring a dark compartment in a light/dark shuttle box. Motivation to stay in the dark is overridden (1) during the training session: when foot-shock (US) (preceded by the acoustic stimulus (CS)) is presented; and (2) during the testing session: when CS, that predicts US, is presented. The latter case occurs when rats successfully form an association between CS and US in the training session and the rat escapes into the light compartment ('responders'). The rats that do not escape ('non-responders' appear to lack this memory as even non-specific fear response (freezing) was absent.</span></p> <p><span>Generally, >50% of rats escape into the lit compartments following CS on the testing day. Importantly, rats do not show a contextual association measured by freezing behavior and preference for a light compartment on the testing day. Moreover, we observed that several putative details in the setup affect the probability of the successful formation of a one-trial trace association. </span><span>Compared to similar tasks, the OTTER task tests incidental learning with no requirement for pre-training. Moreover, the memory formed in the OTTER task consists of two events that do not overlap in time: a characteristic of many episodic memories. The OTTER task presents high-throughput means to study neuronal substrates of incidental temporal binding.</span></p> <p><span></span></p>
Dataset of biocatalyzed reactions
<p>Data and results related to the paper Language models can identify enzymatic active sites in protein<br> sequences.</p>
Reaction-diffusion systems simulations
<p>Simulations of different reaction-diffusion systems. 2D models are 100x100 nodes grid. 1D model 100 nodes chain.</p> <p> </p> <p>biomass_{BIFPARAM} = biomass model</p> <p>fn_{BIFTYPE}_{BIFPARAM} = fitzhugh-nagumo model</p> <p>gl_{BIFTYPE}_{BIFPARAM} = ginzburg-landau model</p> <p>nonlinear_1d_{BIFPARAM} = nonlinear dynamical model, 1D chain of reactive systems</p> <p> </p> <p>Note that fn_turing is not really a turing bifurcation, but rather a travelling wave emission.</p>
Emergence of chaos in a compartmentalized catalytic reaction nanosystem - Database
<p><strong>Supplementary Data to the associated "Nature Communications" article (doi: 10.1038/s41467-023-36434-y) containing the FEM measurements and timeseries simulated by the microkinetic modelling.</strong></p> <p>FEM measurements of the oscillating hydrogen oxidation reaction on Rh at T = 453 K at pressures of p<sub>H2</sub> = 7.0 x 10<sup>-6</sup>, p<sub>H2</sub> = 8.5 x 10<sup>-6</sup> and p<sub>H2</sub> = 11.5 x 10<sup>-6</sup> mbar and constant p<sub>O2</sub> = 4.4 x 10<sup>-6</sup> mbar and data of the calculated surface coverages from the microkinetic simulations.</p>
Reaction Data - Replication Package
<p><strong>Reaction Data - Replication Package:</strong> Contains four .py files to collect for each of the six studied projects :</p> <ul> <li>The reactions on the pull requests</li> <li>The reactions on the pull requests' comments</li> <li>The reactions on the comments of the pull requests' reviews</li> <li>The reactions on the comments of the pull requests' commits Additionally, this package contains all the data used in the quantitative and qualitative analyses.</li> </ul>
Supporting information for "Kinetics of CN(v=1) reactions with butadiene isomers at low temperature by cw-Cavity Ringdown in a pulsed Laval flow with theoretical modelling of rates and entrance channel branching
<p>This file contains the master equation inputs for all the reactions studied, as well as all the details on stationary points and VRC-TST fluxes necessary to reproduce the simulations. </p>
Mechanisms of the reaction of elemental sulfur and polysulfides with cyanide and phosphines
<p>Gaussian 16 output files for all computed structures for "<strong>Mechanisms of the reaction of elemental sulfur and polysulfides with cyanide and phosphines</strong>".</p> <p><em>Chemistry - A European Journal, <strong>2023</strong>, </em>e202203906. DOI: 10.1002/chem.202203906</p>
Acceleration of Diels-Alder reactions by mechanical distortion
<p>Challenges in quantifying how force affects bond formation have hindered the widespread adoption of mechanochemistry. Here, parallel tip-based methods are used to determine reaction rates, activation energies, and activation volumes of force-accelerated [4+2] Diels-Alder cycloadditions between surface-immobilized anthracene and four dienophiles that differ in electronic and steric demand. The rate dependences on pressure are unexpectedly strong, and significant differences are observed between the dienophiles. Multiscale modeling demonstrates that, in proximity to a surface, mechanochemical trajectories ensue that are distinct from those observed solvothermally or under hydrostatic pressure. These results provide a framework for anticipating how experimental geometry, molecular confinement, and directed force contribute to mechanochemical kinetics.</p>
Dataset from Nature Materials paper: Amorphous nickel hydroxide shell tailors local chemical environment on platinum surface for alkaline hydrogen evolution reaction
<p>Dataset of the paper "Amorphous nickel hydroxide shell tailors local chemical environment on platinum surface for alkaline hydrogen evolution reaction" accepted in Nature Materials.</p> <p>- GCGA_inputs.zip: A zip file containing all needed input files to run a grand canonical genetic algorithm (GCGA) global optimization structure search. Note that the script would need modifications to be compatible with later version of the GOCIA package, please following the most updated instructions at https://github.com/zishengz/gocia</p> <p>- GCGA_Ni12OxHy_all_samples.db: An ASE database file containing all unique structures from the GCGA search of Ni12OxHy on a Pt(111) surface. </p> <p>- GM_Ni12O25H13.vasp: The structure of the global minimum structure from GCGA search, which is also the surface structure we focused on in this study, in VASP structure format.</p> <p>- rxn_structures.zip: A zip file containing the structures of reaction intermediates investigated in this work, in VASP structure format</p> <p> </p>
The role of chloroplast movement in C4 photosynthesis: A theoretical analysis using a 3-D reaction-diffusion model for maize
<p>Chloroplast movement within mesophyll (M) cells in C<sub>4</sub> plants is hypothesized to enhance the CO<sub>2</sub> concentrating mechanism (CCM), but this is difficult to verify experimentally. A three-dimensional (3-D) leaf model can help analyze how chloroplast movement influences the operation of CCM. The first volumetric reaction-diffusion model of C<sub>4</sub> photosynthesis that incorporates: detailed 3-D leaf anatomy, light propagation, ATP and NADPH production and CO<sub>2</sub>, O<sub>2</sub> and bicarbonate concentration driven by diffusional and assimilation/emission processes, was developed and implemented for maize leaves to simulate various chloroplast movement scenarios within M cells: the movement of all M chloroplasts towards bundle-sheath (BS) cells (aggregative movement) and movement of only those of interveinal M cells towards BS cells (avoidance movement). Light absorbed by bundle-sheath (BS) chloroplasts relative to M chloroplasts increased in both cases. Avoidance movement decreased light absorption by M chloroplasts considerably. Consequently, total ATP and NADPH production and net photosynthesis rate increased for aggregative movement and decreased for avoidance movement case compared to the default case of no chloroplast movement at high light intensities. Leakiness increased in both chloroplast movement scenarios due to the imbalance in energy production and demand in M and BS cells. These results suggest the need to design strategies for coordinated increases in electron transport and Rubisco activities for an efficient CCM at very high light intensities.</p>
Monitoring the evolution of relative product populations at early times during a photochemical reaction
<p class="MsoNormal"><span>Identifying multiple rival reaction products and transient species formed during ultrafast photochemical reactions and determining their time-evolving relative populations are key steps towards understanding and predicting photochemical outcomes. Yet, most contemporary ultrafast studies struggle with clearly identifying and quantifying competing molecular structures/species amongst the emerging reaction products. Here, we show that mega-electronvolt ultrafast electron diffraction in combination with <em>ab initio</em> molecular dynamics calculations offers a unique route to determine <em>time-resolved </em>populations of the various isomeric products formed after UV (266 nm) excitation of the five-membered heterocyclic molecule thiophenone. This strategy reveals an unexpectedly high (~50%) yield of an episulfide isomer containing a strained 3-membered ring within ~1 ps at early times and rapid interconversions between the rival photoproducts. </span></p>
An orally angiotensin - (1 – 7) inclusion compound reduce time to reaction in 2 stroop task and modify heart rate variability after continuous test in mountain 3 bike cyclists
<p>data for An orally angiotensin - (1 – 7) inclusion compound reduce time to reaction in 2 stroop task and modify heart rate variability after continuous test in mountain 3 bike cyclists,<br> </p> <p>Recently our group showed that hydroxypropyl β-cyclodextrin (HPβ-CD)-Angiotensin-(1-7) (HPβ-CD-Ang-[1-7]) oral formulation affects performance and decreases the perceived effort of mountain bike (MTB) athletes.</p> <p>Twenty-one male MTB practitioners were divided into a continuous protocol time trial and repeated sprint groups. Three hours before a 20-km cycling time trial or 4×30-s repeated all-out sprints on a leg cycle ergometer, the athletes received HPβ-CD-Ang-(1-7) (0.8 mg) or HPβ-CD-placebo (only HPβ-CD) oral capsules over a 7-day interval randomized crossover design. At rest and immediately after the exercise protocol, the ratings of perceived recovery and the visual analog scale were assessed, and the volunteers completed the Stroop task (ST). Heart rate variability was measured at rest and peak effort. There were no differences in the perceived variables. The ST showed that HPβ-CD-Ang-(1-7) supplementation reduced the reaction time (rest 1032±331 ms vs. after protocol 902±286 ms, p=0.05) after the continuous time trial. The withdrawal of the parasympathetic components in the peak effort to the continuous protocol was not different from that of rest in the HPβ-CD-Ang-(1-7) condition. The results are pioneering, especially in humans, but indicate that Angiotensin-(1-7) potentially affects reaction time and the parasympathetic withdrawal after continuous protocol time trial.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.