Theoretical study on the base-controlled selective linear or branched ortho-alkylation of azines catalyzed by rhodium: Mechanisms and the role of base

2019 ◽  
Vol 462 ◽  
pp. 77-84 ◽  
Author(s):  
Kang Lv ◽  
Yuanye Jiang ◽  
Lingli Han ◽  
Tao Liu ◽  
Siwei Bi
Keyword(s):  
Theoretical Study

Role of Man in Production and Social Systems Based on Digital Technologies

2020 ◽  
pp. 6-13
Author(s):  
V. K. Potemkin
Keyword(s):  
Theoretical Study ◽  
Social Systems ◽  
Digital Technologies ◽  
Changing Role ◽  
Consistent Approach ◽  
Social Improvement

The article presents the results of a theoretical study of the influence processes of the developed digital technologies and the activities of enterprises and organizations on the changing role of man in labor and their social improvement. The necessity of a balanced and consistent approach to create conditions for the use of digital technologies in practical activities and determining the con- sequences not only in enterprises and organizations, but also in the conscious behavior and social realities of all workers, without exception, is substantiated. The main directions of the development of digital technologies are determined, involving the wide participation of workers in their use in enterprises and organizations.

scholarly journals The Role of La2O3 in Enhancement the Radiation Shielding Efficiency of the Tellurite Glasses: Monte-Carlo Simulation and Theoretical Study

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3913
Author(s):  
Aljawhara H. Almuqrin ◽  
Mohamed Hanfi ◽  
K. G. Mahmoud ◽  
M. I. Sayyed ◽  
Hanan Al-Ghamdi ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Theoretical Study ◽  
Radiation Shielding ◽  
Photon Flux ◽  
Transmission Factor ◽  
Tellurite Glasses ◽  
Attenuation Coefficients ◽  
Binary Glass ◽  
Buildup Factors

The radiation shielding competence was examined for a binary glass system xLa2O3 + (1 − x) TeO2 where x = 5, 7, 10, 15, and 20 mol% using MCNP-5 code. The linear attenuation coefficients (LACs) of the glasses were evaluated, and it was found that LT20 glass has the greatest LAC, while LT5 had the least LAC. The transmission factor (TF) of the glasses was evaluated against thicknesses at various selected energies and was observed to greatly decrease with increasing thickness; for example, at 1.332 MeV, the TF of the LT5 glass decreased from 0.76 to 0.25 as the thickness increased from 1 to 5 cm. The equivalent atomic number (Zeq) of the glasses gradually increased with increasing photon energy above 0.1 MeV, with the maximum values observed at around 1 MeV. The buildup factors were determined to evaluate the accumulation of photon flux, and it was found that the maximum values for both can be seen at around 0.8 MeV. This research concluded that LT20 has the greatest potential in radiation shielding applications out of the investigated glasses due to the glass having the most desirable parameters.

Role of (H2O)n (n = 2–3) Clusters on the HO2 + O3 Reaction: A Theoretical Study

2015 ◽  
Vol 120 (8) ◽  
pp. 1560-1568 ◽  
Author(s):  
Luís P. Viegas ◽  
António J. C. Varandas
Keyword(s):  
Theoretical Study

Theoretical study on the role of cooperative solvent molecules in the neutral hydrolysis of ketene

2010 ◽  
Vol 127 (5-6) ◽  
pp. 493-506 ◽  
Author(s):  
Xiao-Peng Wu ◽  
Xi-Guang Wei ◽  
Xiao-Ming Sun ◽  
Yi Ren ◽  
Ning-Bew Wong ◽  
...  
Keyword(s):  
Theoretical Study ◽  
Solvent Molecules ◽  
Hydrolysis Of

General promoting effect of polydopamine on supported noble metal catalysts

2017 ◽  
Vol 5 (39) ◽  
pp. 20789-20796 ◽  
Author(s):  
Mingwei Zhang ◽  
Guozhu Li ◽  
Xiaoqing Sun ◽  
Yujiao Jiang ◽  
Xiangwen Zhang
Keyword(s):  
Noble Metal ◽  
Theoretical Study ◽  
Metal Catalysts ◽  
Promoting Effect ◽  
Noble Metal Catalysts

A joint experimental–theoretical study has been conducted to investigate the role of polydopamine as an interface facilitator for supported noble metal catalysts.

Proton-induced collision dynamics on potential prebiotic sulfur species

2018 ◽  
Vol 20 (14) ◽  
pp. 9084-9089 ◽  
Author(s):  
Marie-Christine Bacchus-Montabonel
Keyword(s):  
Charge Transfer ◽  
Ab Initio ◽  
Theoretical Study ◽  
Collision Dynamics ◽  
Sulfur Species ◽  
Hcn Oligomers ◽  
Induced Charge

The role of sulfur in proton-induced charge transfer is analyzed through an ab initio theoretical study of mercaptoacetonitrile HSCH2CN with related HCN oligomers.

scholarly journals Digital Economy and Communication Technologies: Methods and Mechanisms of Promotion through E-Commerce and E-Marketing

2021 ◽  
pp. 10-22
Author(s):  
Foued Sabbagh ◽  
Keyword(s):  
Information And Communication Technology ◽  
Communication Technology ◽  
Theoretical Study ◽  
Technological Development ◽  
Communication Technologies ◽  
Digital Economy ◽  
Daily Lives ◽  
Internet Users ◽  
Information And Communication

This paper focuses on the methods and the mechanisms of E-commerce and E-marketing, and the important role of international electronic companies in this vital and digital field. The spreaders of the digital economy and the techniques of information and communication technology are deployed with applications of E-commerce and E-marketing. Thus, the digital globalization opens the horizon of technological development and accelerates the growth of the use of modern techniques through the innovation of the digital economy in our daily lives. In addition, the modernization of companies in the field of E-marketing and E-commerce has a direct impact on the strategic relationship between internet users, information, technology and business. In this sense, my theoretical study determines methods and mechanisms of promotion through E-commerce and E-marketing during the revolution of the digital economy and the technologies of modern and social communication.

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