Results 61 to 70 of about 807,468 (201)

Enantioselective acyl-trifluoromethylation of olefins by bulky thiazolium carbene catalysis

Nature Communications
Enantioenriched α-chiral β-fluorinated ketones are valuable structural motifs with application in several fields. The recently emerged concept of NHC-catalyzed radical acyl-trifluoromethylation of olefins offers a rapid route to construct racemic β ...
Sripati Jana, Matthew D. Wodrich, Nicolai Cramer   +2 more
doaj   +1 more source

Verbal predication negation in Dawurotsuwa

Cogent Arts & Humanities
This paper presents an analysis of the verbal negation of declarative main clauses in Dawurotsuwa. This study aims to describe verbal negation in Dawurotsuwa, a language that is scarcely described.
Aklilu Abera Naba
doaj   +1 more source

Optimal Asymmetric Data Encryption Algorithm [PDF]

, 2021
Today public-key cryptosystems are particularly vulnerable to fetching cipher text and adaptively matched plaintext attacks To prevent such attacks in practice optimal asymmetric algorithms are used for example RSA-OAEP and etc In this article ...
Kuryazov D.M.
core  

Compact Low Loss Ribbed Asymmetric Multimode Interference Power Splitter

Photonics
Optical power splitters (OPSs) are utilized extensively in integrated photonic circuits, drawing significant interest in research on power splitters with adjustable splitting ratios.
Yanfeng Liang, Huanlin Lv, Baichao Liu, Haoyu Wang, Fangxu Liu, Shuo Liu, Yang Cong, Xuanchen Li, Qingxiao Guo   +8 more
doaj   +1 more source

Recent advances in copper-catalyzed asymmetric coupling reactions

Beilstein Journal of Organic Chemistry, 2015
Copper-catalyzed (or -mediated) asymmetric coupling reactions have received significant attention over the past few years. Especially the coupling reactions of aryl or alkyl halides with nucleophiles became a very powerful tool for the formation of C–C ...
Fengtao Zhou, Qian Cai
doaj   +1 more source

Strategies to Enhance the Performance of Electrochemical Capacitors Based on Carbon Materials

Frontiers in Materials, 2019
The increasing worldwide energy consumption has contributed to both the vast growth of greenhouse emissions from carbon-containing fuels-based sources (coal, petroleum, etc.) and the depletion of the aforementioned sources.
David Salinas-Torres, David Salinas-Torres, Ramiro Ruiz-Rosas, Emilia Morallón, Diego Cazorla-Amorós   +4 more
doaj   +1 more source

The human brain arterial circle variants and integrated classification of individual-typological variability

Сеченовский вестник, 2018
Objective. The variability of the design of the arterial circle of the human brain (ACHB) has been studied.Materials and methods. The systematization was carried out and the original classification of the variants of ACHB was compiled.
V. N. Nikolenko, A. V. Pavlov, V. E. Timofeev, S. R. Zherebyatyeva, S. M. Timofeeva   +4 more
doaj   +1 more source

How asymmetrical before it's asymmetrical?

Journal of biosciences, 2000
The last ten years have witnessed the shifting fortunes of the fluctuating asymmetry (FA) paradigm (called the fluctuating paradigm by Simmons et al 1998). FA is the small (often < 1%) random deviations from perfect bilateral symmetry that occur during the development of symmetrical traits.
openaire   +2 more sources

The Impact of Political Relations on China’s Outward Direct Investment

Entrepreneurial Business and Economics Review, 2018
Objective: This article relates to the growing amount of literature on the determinants of the location choice of Chinese ODI. The objective of the article is to investigate whether the improvement in political relations will encourage more investment ...
Lin Zhang, Xiaoqiong Hao
doaj   +1 more source

An Asymmetric Block Dynamic Conditional Correlation Multivariate GARCH Model [PDF]

The Block DCC model for determining dynamic correlations within and between groups of financial asset returns is extended to account for asymmetric effects.
Vargas, Gregorio A.
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