Asymmetric Dearomatization of Indole by Palladium/PC‐Phos‐Catalyzed Dynamic Kinetic Transformation

2020 ◽  
Vol 59 (49) ◽  
pp. 21991-21996
Author(s):  
Haoke Chu ◽  
Jie Cheng ◽  
Junfeng Yang ◽  
Yin‐Long Guo ◽  
Junliang Zhang
Keyword(s):  
Kinetic Transformation

scholarly journals Testing Compound Nucleus Hypothesis Across the 17O Nucleus Excitation

2019 ◽  
Vol 211 ◽  
pp. 02001 ◽  
Author(s):  
Aloys Nizigama ◽  
Pierre Tamagno ◽  
Olivier Bouland
Keyword(s):  
Cross Section ◽  
Compound Nucleus ◽  
Cross Sections ◽  
Center Of Mass ◽  
Ground States ◽  
Mass System ◽  
Resonance Parameters ◽  
Second Stage ◽  
Reference Framework ◽  
Kinetic Transformation

The excited compound nucleus 17O* has been studied over (n,α) and (α,n) cross sections modelling, respectively for 16O and 13C targets in their ground states. The modelling is fulfilled within the Reich-Moore formalism. We were able to calculate the (α,n) cross section by two separate ways: the direct kinematic standard route and by inversion of the (n,α) cross section using the compound nucleus hypothesis. Resonance parameters of the resolved resonance range (0 to 6 MeV) were borrowed from the CIELO project. In a first stage, the modelling is carried out in the referential of the incident particle (either way neutron or α) requesting conversion of the CIELO neutron-type resonance parameters to the α-type. In a second stage, the implementation is uniquely designed in the center of mass system of the excited compound nucleus. The resonance parameters are thus converted in that unique reference framework. The present investigation shows the consistency of the kinetic transformation that relies on the compound nucleus hypothesis.

Designing Architectural Morphing Skins with Elastic Modular Systems

2011 ◽  
Vol 9 (4) ◽  
pp. 397-419 ◽  
Author(s):  
Chin Koi Khoo ◽  
Flora Salim ◽  
Jane Burry
Keyword(s):  
Climatic Conditions ◽  
Existing Buildings ◽  
Physical Computation ◽  
Modular Systems ◽  
Mechanical Joints ◽  
Kinetic Transformation ◽  
Elastic Form ◽  
Shading Devices ◽  
Design Experiments

This paper discusses the issues of designing architectural skins that can be physically morphed to adapt to changing needs. To achieve this architectural vision, designers have focused on developing mechanical joints, components, and systems for actuation and kinetic transformation. However, the unexplored approach of using lightweight elastic form-changing materials provides an opportunity for designing responsive architectural skins and skeletons with fewer mechanical operations. This research aims to develop elastic modular systems that can be applied as a second skin or brise-soleil to existing buildings. The use of the second skin has the potential to allow existing buildings to perform better in various climatic conditions and to provide a visually compelling skin. This approach is evaluated through three design experiments with prototypes, namely Tent, Curtain and Blind, to serve two fundamental purposes: Comfort and Communication. These experimental prototypes explore the use of digital and physical computation embedded in form-changing materials to design architectural morphing skins that manipulate sunlight and act as responsive shading devices.

Theoretical Investigation on Mechanistic and Kinetic Transformation of 2,2′,4,4′,5-Pentabromodiphenyl Ether

2015 ◽  
Vol 119 (24) ◽  
pp. 6404-6411 ◽  
Author(s):  
Haijie Cao ◽  
Dandan Han ◽  
Mingyue Li ◽  
Xin Li ◽  
Maoxia He ◽  
...  
Keyword(s):  
Theoretical Investigation ◽  
Kinetic Transformation

Cu-catalyzed asymmetric addition of sp2-hybridized zirconium nucleophiles to racemic allyl bromides

2015 ◽  
Vol 51 (24) ◽  
pp. 5044-5047 ◽  
Author(s):  
Mireia Sidera ◽  
Stephen P. Fletcher
Keyword(s):  
Allylic Alkylation ◽  
Asymmetric Allylic Alkylation ◽  
Asymmetric Addition ◽  
Kinetic Transformation

Asymmetric allylic alkylation with sp2 hybridized zirconium nucleophiles via a dynamic kinetic transformation is reported.

Dynamic Kinetic Transformation of Sulfinyl Chlorides:  Synthesis of Enantiomerically PureC2-Symmetric Bis-Sulfoxides

2002 ◽  
Vol 67 (2) ◽  
pp. 345-356 ◽  
Author(s):  
Noureddine Khiar ◽  
Cristina S. Araújo ◽  
Felipe Alcudia ◽  
Inmaculada Fernández
Keyword(s):  
Kinetic Transformation

scholarly journals Effect of pH on the Hydrolytic Kinetics of Gamma-Glutamyl Transferase fromBacillus subtilis

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Sharath Balakrishna ◽  
Asmita Prabhune
Keyword(s):  
Conformational Changes ◽  
Quaternary Structure ◽  
Gamma Glutamyl Transferase ◽  
Effect Of Ph ◽  
Gamma Glutamyl ◽  
Steady State Kinetics ◽  
Kinetic Transformation ◽  
Ph Range ◽  
Glutamyl Transferase ◽  
Kinetics Of

The effect of pH on the steady state kinetics of gamma-glutamyl transferase (GGT) fromBacillus subtiliswas examined using glutamyl-(3-carboxyl)-4-nitroanilide as the chromogenic reporter substrate. The enzyme was active in the pH range 7.0–11.0 with the optimum activity at pH 11.0. We noticed a pH dependent transformation in the nature of substrate consumption kinetics. The substrate saturation curves were hyperbolic in the pH range 7.0–9.0 but changed into sigmoid form at pH 10.0 and 11.0. Hill’s coefficients were >1. We also analysed the effect of pH on the structure of the enzyme. The circular dichroism spectra of the enzyme sample at pH 9.0 and 11.0 were coincidental in both far and near UV regions indicating conservation of the secondary and tertiary structures, respectively. The molecular weight of the enzyme sample was the same in both pH 7.0 and 11.0 indicating conservation of the quaternary structure. These results show that the kinetic transformation does not involve significant conformational changes. Cooperative binding of multiple substrate molecules may not be the basis for the sigmoid kinetics as only one substrate binding site has been noticed in the reported crystal structures ofB. subtilisGGT.

scholarly journals Palladium-Catalyzed Asymmetric Hydrophosphination of Internal Alkynes: Highly Regio- and Stereoselective Construction of Axially Chiral Phosphines

2021 ◽  
Author(s):  
Danqing Ji ◽  
Jierui Jing ◽  
Yi Wang ◽  
Zisong Qi ◽  
Fen Wang ◽  
...  
Keyword(s):  
Axial Chirality ◽  
Axially Chiral ◽  
Internal Alkynes ◽  
Trisubstituted Olefins ◽  
Palladium Catalyzed ◽  
Chiral Phosphines ◽  
Kinetic Transformation ◽  
Secondary Phosphines

Palladium-catalyzed unprecedented atroposelective hydrophosphination of internal alkynes has been realized using diarylphosphines, affording C-N axially chiral trisubstituted olefins (vinylphosphines) in excellent regioselectiviry, (E)-selectivity, and enantioselectivity. The axial chirality was established via integration of hydrophosphination and dynamic kinetic transformation of the alkynes, with both symmetrical and nonsymmetrical secondary phosphines being applicable. In the latter case, additional P-central chirality has been constructed in good diastereoselectivity.

Morphological and Kinetic Transformation of Calcite Crystal Growth by Prismatic-Associated Asprich Sequences

2008 ◽  
Vol 8 (4) ◽  
pp. 1154-1160 ◽  
Author(s):  
Il Won Kim ◽  
Jennifer L. Giocondi ◽  
Christine Orme ◽  
Sebastiano Collino ◽  
John Spencer Evans
Keyword(s):  
Crystal Growth ◽  
Calcite Crystal ◽  
Kinetic Transformation

scholarly journals Bainite kinetic transformation of austempered AISI 6150 steel

2020 ◽  
Vol 9 (2) ◽  
pp. 1357-1364
Author(s):  
Xue Han ◽  
Zhenpu Zhang ◽  
Yanhao Rong ◽  
Steven J. Thrush ◽  
Gary C. Barber ◽  
...  
Keyword(s):  
Kinetic Transformation
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