When a tree falls in a river…a cascade process begins

2020 ◽  
pp. 3-8
Author(s):  
Virginia Ruiz-Villanueva
Keyword(s):  
Cascade Process ◽  
Tree Falls

If a Tree Falls in the Forest: COVID-19, Media Choices, and Presidential Agenda Setting

2020 ◽  
Author(s):  
Masha Krupenkin ◽  
Kai Zhu ◽  
Dylan Walker ◽  
David M. Rothschild
Keyword(s):  
Agenda Setting ◽  
Tree Falls ◽  
Media Choices

scholarly journals Synthesis of Fused Dihydroazepine Derivatives of Fullerenes by a Rh‐Catalyzed Cascade Process

2021 ◽  
Author(s):  
Albert Artigas ◽  
Cristina Castanyer ◽  
Nil Roig ◽  
Agustí Lledó ◽  
Miquel Solà ◽  
...  
Keyword(s):  
Cascade Process ◽  
Derivatives Of

scholarly journals Access to 6-hydroxy indolizines and related imidazo[1,5-a]pyridines through the SN2 substitution/condensation/tautomerization cascade process

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25624-25627
Author(s):  
Guiyun Duan ◽  
Hao Liu ◽  
Liqing Zhang ◽  
Chunhao Yuan ◽  
Yongchao Li ◽  
...  
Keyword(s):  
Cascade Reaction ◽  
Cascade Process

A simple and efficient cascade reaction was developed for the construction of hydroxy substituted indolizines from pyrrole-2-carbaldehydes and commercially available 4-halogenated acetoacetic esters.

Enantiocomplementary decarboxylative hydroxylation combining photocatalysis and whole-cell biocatalysis in a one-pot cascade process

2019 ◽  
Vol 21 (8) ◽  
pp. 1907-1911 ◽  
Author(s):  
Jian Xu ◽  
Mamatjan Arkin ◽  
Yongzhen Peng ◽  
Weihua Xu ◽  
Huilei Yu ◽  
...  
Keyword(s):  
Cascade Process ◽  
One Pot ◽  
Whole Cell ◽  
Whole Cell Biocatalysis

The first demonstration of photochemo-enzymatic whole-cell one-pot enantiocomplementary decarboxylative hydroxylation.

Synthesis of Highly Functionalized Pyridines: A Metal-Free Cascade Process

2021 ◽  
Author(s):  
Kai Wei ◽  
Yu-Cui Sun ◽  
Rui Li ◽  
Jing-Feng Zhao ◽  
Wen Chen ◽  
...  
Keyword(s):  
Cascade Process ◽  
Metal Free

Effects of Space Charge on ESEM Gas Amplification

1997 ◽  
Vol 3 (S2) ◽  
pp. 609-610 ◽  
Author(s):  
B.L. Thiel ◽  
M.R. Hussein-Ismail ◽  
A.M. Donald
Keyword(s):  
Electric Field ◽  
Electrostatic Field ◽  
Secondary Electron ◽  
Sample Surface ◽  
Cascade Process ◽  
Secondary Electrons ◽  
Positive Ions ◽  
Space Charges ◽  
Cascade Amplification ◽  
Environmental Sem

We have performed a theoretical investigation of the effects of space charges in the Environmental SEM (ESEM). The ElectroScan ESEM uses an electrostatic field to cause gas cascade amplification of secondary electron signals. Previous theoretical descriptions of the gas cascade process in the ESEM have assumed that distortion of the electric field due to space charges can be neglected. This assumption has now been tested and shown to be valid.In the ElectroScan ESEM, a positively biased detector is located above the sample, creating an electric field on the order of 105 V/m between the detector and sample surface. Secondary electrons leaving the sample are cascaded though the gas, amplifying the signal and creating positive ions. Because the electrons move very quickly through the gas, they do not accumulate in the specimen-to-detector gap. However, the velocity of the positive ions is limited by diffusion.

scholarly journals Metal-Free Air Oxidation in a Convenient Cascade Approach for the Access to Isoquinoline-1,3,4(2H)-triones

Molecules ◽  
2019 ◽  
Vol 24 (11) ◽  
pp. 2177
Author(s):  
Antonia Di Mola ◽  
Consiglia Tedesco ◽  
Antonio Massa
Keyword(s):  
Heterocyclic Compounds ◽  
Aromatic Ketone ◽  
Primary Amines ◽  
Cascade Process ◽  
Staudinger Reaction ◽  
Caspase Inhibitor ◽  
Air Oxidation ◽  
Metal Free ◽  
Free Air

Herein we describe a very useful application of the readily available trifunctional aromatic ketone methyl-2-(2-bromoacetyl)benzoate in reactions with primary amines. An unexpected in situ air oxidation that follows a cascade process allowed the access to a series of isoquinoline-1,3,4(2H)-triones, a class of heterocyclic compounds of great interest containing an oxygen-rich heterocyclic scaffold. A modification of the original protocol, utilizing a Staudinger reaction in the presence of trimethylphosphine, was necessary for the synthesis of Caspase inhibitor trione with free NH group.

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