scholarly journals Distribution of aliphatic amines in CO, CV, and CK carbonaceous chondrites and relation to mineralogy and processing history

2017 ◽  
Vol 52 (12) ◽  
pp. 2632-2646 ◽  
Author(s):  
José C. Aponte ◽  
Neyda M. Abreu ◽  
Daniel P. Glavin ◽  
Jason P. Dworkin ◽  
Jamie E. Elsila
Keyword(s):  
Aliphatic Amines ◽  
Carbonaceous Chondrites ◽  
Processing History

scholarly journals Aliphatic amines in Antarctic CR2, CM2, and CM1/2 carbonaceous chondrites

2016 ◽  
Vol 189 ◽  
pp. 296-311 ◽  
Author(s):  
José C. Aponte ◽  
Hannah L. McLain ◽  
Jason P. Dworkin ◽  
Jamie E. Elsila
Keyword(s):  
Aliphatic Amines ◽  
Carbonaceous Chondrites

Exogenous Directing Group Free, Ligand-Enabled gamma-C(sp3)–H Arylation of Free Primary Aliphatic Amines and α-Amino Esters

2019 ◽  
Author(s):  
Yongzheng Ding ◽  
Shuai Fan ◽  
Xiaoxi Chen ◽  
yuzhen gao ◽  
Gang Li
Keyword(s):  
Amino Acids ◽  
Large Scale ◽  
Free Ligand ◽  
Aliphatic Amines ◽  
Rapid Synthesis ◽  
Amino Esters ◽  
Directing Group ◽  
Large Scale Synthesis ◽  
Primary Aliphatic Amines

A Pdᴵᴵ-catalyzed, ligand-enabled gamma-C(sp3)–H arylation of free primary aliphatic amines and amino esters without using an exogenous directing group is reported. This reaction is compatible with unhindered free aliphatic amines, and it is also be applicable to the rapid synthesis of biologically and synthetically valuable unnatural α-amino acids. Large scale synthesis is also feasible using this method.<br>

METAMORPHISM OF CK CARBONACEOUS CHONDRITES: SO, WHAT’S YOUR PETROLOGIC TYPE?

2016 ◽  
Author(s):  
Tasha Dunn ◽  
◽  
Juliane Gross ◽  
Marina Ivanova
Keyword(s):  
Carbonaceous Chondrites

PREPARING FOR SAMPLE RETURN: COORDINATED ANALYSIS OF EXPERIMENTALLY SPACE WEATHERED CARBONACEOUS CHONDRITES

2018 ◽  
Author(s):  
Michelle S. Thompson ◽  
◽  
Lindsay P. Keller ◽  
Mark J. Loeffler ◽  
Richard V. Morris ◽  
...  
Keyword(s):  
Carbonaceous Chondrites ◽  
Sample Return

A Comparative Study of Adsorption of Aliphatic Amines at a Gold Electrode

2005 ◽  
Vol 70 (12) ◽  
pp. 2027-2037 ◽  
Author(s):  
Teresa Łuczak
Keyword(s):  
Gibbs Energy ◽  
Comparative Study ◽  
Gold Electrode ◽  
Surface Coverage ◽  
Standard Gibbs Energy ◽  
Gold Surface ◽  
Experimental Dependence ◽  
Aliphatic Amines ◽  
Solvent Interactions ◽  
Amine Concentration

Adsorption of aliphatic amines (C1-C4) at the gold electrode was studied by tensammetry. It has been established that the experimental dependence between the gold surface coverage (Θ) and the bulk amine concentration (cA) fits satisfactorily both by the Frumkin and Flory-Huggins isotherms. The standard Gibbs energy of adsorption, ∆G°ad at Emax for Θ < 0.8 has been found to increase in the order methylamine < ethylamine < propylamine < butylamine. This is rationalised in terms of surface-adsorbate, adsorbate-adsorbate and adsorbate-solvent interactions.

Factors Influencing the Fatigue Behavior of Ferrous Laminates

1987 ◽  
Vol 109 (3) ◽  
pp. 244-251 ◽  
Author(s):  
J. Wittenauer ◽  
O. D. Sherby
Keyword(s):  
Fatigue Crack ◽  
Fatigue Life ◽  
Carbon Steel ◽  
Fatigue Behavior ◽  
Layered Material ◽  
Factors Influencing ◽  
Ultrahigh Carbon Steel ◽  
Processing History ◽  
Crack Blunting ◽  
Similar Processing

Laminates based on ultrahigh carbon steel were prepared and found to exhibit enhanced fatigue life as compared to a monolithic reference material. This result was achieved through the insertion of weak interlaminar regions of copper into the layered material during preparation of the laminates. The presence of these regions allowed for the operation of a delamination mechanism in advance of the propagating fatigue crack. The result was interlaminar separation and associated crack blunting. Stress-life curves show that an increase in life by as much as a factor of four is achieved for these materials when compared to monolithic specimens of similar processing history.

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