In Situ Methods for Identifying Reactive Surface Intermediates during Hydrogenolysis Reactions: C–O Bond Cleavage on Nanoparticles of Nickel and Nickel Phosphides

2019 ◽  
Vol 141 (42) ◽  
pp. 16671-16684 ◽  
Author(s):  
Megan E. Witzke ◽  
Abdulrahman Almithn ◽  
Christian L. Coonrod ◽  
Mark D. Triezenberg ◽  
David D. Hibbitts ◽  
...  
Keyword(s):  
Bond Cleavage ◽  
Reactive Surface ◽  
Nickel Phosphides ◽  
Surface Intermediates ◽  
In Situ Methods

LIGHTER-THAN-AIR (LTA) UNMANNED AERIAL SYSTEM (UAS) CARRIER CONCEPT FOR SURVAILLANCE AND DISASTER MANAGEMENT

2019 ◽  
Vol 3 ◽  
pp. 1255
Author(s):  
Ahmad Salahuddin Mohd Harithuddin ◽  
Mohd Fazri Sedan ◽  
Syaril Azrad Md Ali ◽  
Shattri Mansor ◽  
Hamid Reza Jifroudi ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Disaster Management ◽  
Unmanned Aerial Systems ◽  
Unmanned Aerial System ◽  
Border Control ◽  
Aerial Vehicles ◽  
Operational Safety ◽  
In Situ Methods ◽  
Aerial Systems

Unmanned aerial systems (UAS) has many advantages in the fields of SURVAILLANCE and disaster management compared to space-borne observation, manned missions and in situ methods. The reasons include cost effectiveness, operational safety, and mission efficiency. This has in turn underlined the importance of UAS technology and highlighted a growing need in a more robust and efficient unmanned aerial vehicles to serve specific needs in SURVAILLANCE and disaster management. This paper first gives an overview on the framework for SURVAILLANCE particularly in applications of border control and disaster management and lists several phases of SURVAILLANCE and service descriptions. Based on this overview and SURVAILLANCE phases descriptions, we show the areas and services in which UAS can have significant advantage over traditional methods.

Recent Developments in the Asymmetric Detrifluoroacetylative Reactions of in situ Generated Mono-Fluorinated Enolates

2020 ◽  
Vol 24 (18) ◽  
pp. 2181-2191
Author(s):  
Li Wang ◽  
Ziyi Li ◽  
Jiang Liu ◽  
Jianlin Han ◽  
Hiroki Moriwaki ◽  
...  
Keyword(s):  
Organic Chemistry ◽  
Bond Cleavage ◽  
Synthetic Methodology ◽  
Research Topics ◽  
Synthetic Organic Chemistry ◽  
Nucleophilic Reactions ◽  
F Center ◽  
Recent Developments

The development of an efficient and mild synthetic methodology for the construction of bioactive fluorine-containing molecules represents one of the hot research topics in general synthetic organic chemistry. In this review, some recent progresses achieved in the development of detrifluoroacetylatively generated mono-fluorinated enolates via CC bond cleavage and their asymmetric nucleophilic reactions for assembly of chiral quaternary C-F center containing compounds.

Material Reliability of Low-Temperature Boron Deposition for PureB Silicon Photodiode Fabrication

MRS Advances ◽  
2018 ◽  
Vol 3 (57-58) ◽  
pp. 3397-3402 ◽  
Author(s):  
L.K. Nanver ◽  
K. Lyon ◽  
X. Liu ◽  
J. Italiano ◽  
J. Huffman
Keyword(s):  
High Temperature ◽  
Layer Thickness ◽  
Vapor Deposition ◽  
Dark Current ◽  
Deposition Temperature ◽  
Chemical Vapor ◽  
Silicon Photodiode ◽  
In Situ Methods ◽  
Deposition Conditions

ABSTRACTThe chemical-vapor deposition conditions for the growth of pure boron (PureB) layers on silicon at temperatures as low as 400°C were investigated with the purpose of optimizing photodiodes fabricated with PureB anodes for minimal B-layer thickness, low dark current and chemical robustness. The B-deposition is performed in a commercially-available Si epitaxial reactor from a diborane precursor. In-situ methods commonly used to improve the cleanliness of the Si surface before deposition are tested for a deposition temperature of 450°C and PureB layer thickness of 3 nm. Specifically, high-temperature baking in hydrogen, and exposure to HCl are tested. Both material analysis and electrical diode characterization indicate that these extra cleaning steps degrade the properties of the PureB layer and the fabricated diodes.

In Situ Methods for Identifying the Stem Cell of the Normal and Cancerous Breast

2014 ◽  
pp. 151-182 ◽  
Author(s):  
Yanrong Su ◽  
Pedro J. Gutiérrez Diez ◽  
Julia Santucci-Pereira ◽  
Irma H. Russo ◽  
Jose Russo
Keyword(s):  
Stem Cell ◽  
In Situ Methods

scholarly journals DETERMINATION OF MECHANICAL PROPERTIES OF REPAIR MORTARS USING IN SITU METHODS UNDER DIFFERENT CURINGS

2020 ◽  
Vol 2 ◽  
pp. 3-18
Author(s):  
Ali Saberi Varzaneh ◽  
Mahmoud Naderi
Keyword(s):  
Mechanical Properties ◽  
Concrete Structures ◽  
High Impact ◽  
Physical Factors ◽  
High Confidence ◽  
In Situ Methods ◽  
Repair Mortars ◽  
Friction Transfer

Considering the differences between environmental conditions of concrete structures and laboratory conditions, it is important to determine the parameters of the materials at the site of the structure. One of these materials is cement-based repair mortars due to the damage of concrete structures that may arise due to chemical or physical factors, these structures are required to be repaired. For this reason, in this paper, to determine the strength of repair mortars of different ages and under different Curing, Situ methods "Friction-Transfer" and "Pull-off" were used and the relationships between the Flexural Compressive, Tensile and readings obtained from the above methods on cementations mortars are presented. Experiments were performed on mortars at ages 3, 7, 28, 42 and 90 days under the conditions of "waterlogging", "Curing Agent" and "releasing in the outdoor". The results show the high impact of the process on the Flexural Compressive, Tensile of the repair mortars and the results of the "Friction-Transfer" and "Pull-off" methods. Also, a high correlation coefficient was obtained between the mechanical properties of the mortars and the results of the above tests; it is possible to measure the mechanical properties of repair mortars in situ with high confidence and in situ

Evidence for Degradation of the Chrome Yellows in Van Gogh’sSunflowers: A Study Using Noninvasive In Situ Methods and Synchrotron-Radiation-Based X-ray Techniques

2015 ◽  
Vol 127 (47) ◽  
pp. 14129-14133 ◽  
Author(s):  
Letizia Monico ◽  
Koen Janssens ◽  
Ella Hendriks ◽  
Frederik Vanmeert ◽  
Geert Van der Snickt ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
X Ray ◽  
In Situ Methods

Complementary DNA Synthesis in Situ: Methods and Applications

1995 ◽  
pp. 3-23
Author(s):  
JAMES EBERWINE ◽  
CORINNE SPENCER ◽  
KEVIN MIYASHIRO ◽  
SCOTT MACKLER ◽  
RICHARD FINNELL
Keyword(s):  
Dna Synthesis ◽  
Complementary Dna ◽  
In Situ Methods
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