A single-electron tunneling model: a theoretical analysis of a metal nanoparticle-doped epoxy resin to suppress surface charge accumulation on insulators subjected to DC voltages.

In high-voltage direct current transmission systems, charges accumulate at the gas-solid interface, distorting the local field strength, causing a reduction in the flashover voltage, and threatening the safe and reliable operation of the power system. The latest research has found that doping metal nanoparticles into an epoxy resin effectively suppresses the surface charge accumulation on insulators and improves their flashover voltage. This paper further analyzes the microscopic mechanism of this phenomenon, establishes a single-electron tunneling mode, and draws two conclusions: when there is no agglomeration of the doped nanoparticles, a higher doping concentration can be achieved, which provides a better insulative performance.

Metal nanoparticle-doped epoxy resin to suppress surface charge accumulation on insulators under DC voltage.

In high-voltage direct current (HVDC) transmission systems, electric charge accumulates on insulator surfaces, causing surface electric field distortion and flashover voltage reduction. Therefore, studying a material that can improve the insulator surface insulation strength is of great engineering value. In this work, several types of metal nanoparticles with different particle sizes and concentrations are doped into epoxy resin.

Anti-malarial activity of new N-acetyl-L-leucyl-L-leucyl-L-norleucinal (ALLN) derivatives against Plasmodium falciparum.

Malaria is the most common of the parasitic diseases in tropical and subtropical regions. Adverse side effects of anti-malarial drugs have precluded them as a potential clinical drug. In this study, novel derivatives of N-acetyl-L-leucyl-L-leucyl-L-norleucinal (ALLN) based on a variety of dipeptidyl α,β-unsaturated amides containing lysine as a part were synthesized and evaluated.

Synthesis and evaluation of peptidyl α,β-unsaturated carbonyl derivatives as anti-malarial calpain inhibitors.

Malarial calpain is a cysteine protease believed to be a central mediator essential for parasitic activities. N-Acetyl-L-leucyl-L-leucyl-L-norleucinal (ALLN), a calpain inhibitor, showed an excellent inhibitory effect on the erythrocytic stages of Plasmodium falciparum. However the aldehyde group of ALLN makes it susceptible to metabolism.

[Genetic potential analysis of six tilapia populations by microsatellite DNA markers].

Twenty five microsatellite loci were used to analyze two blue tilapia populations ["Xia'ao 1" (ZA), Guangxi population] and four nile tilapia populations [Egypt strain (ZN), 88 strain (XN), Guangxi population (GN), American strain (MN)]. A total of 7775 fragments ranging from 100 bp to 400 bp in length were obtained. Three to eight alleles were amplified in 25 loci and 143 alleles in all the six populations.

Development of 10 tri- and tetranucleotide microsatellite loci for population studies in the common carp (Cyprinus carpio L.).

Ten tri- and tetranucleotide microsatellite DNA markers were isolated and characterized from common carp (Cyprinus carpio L.) to estimate genetic potential. These markers were tested in the samples from two closely related carp populations (Cyprinus carpio var.

[Genetic potential analysis of Germany mirror carp (Cyprinus carpio L.) using microsatellite markers].

Using 30 microsatellite markers and combining quantity characters such as body weight, body size and body width, we evaluated the genetic potential of 3 Germany mirror carp populations. Number of effective alleles (Ae), observed (Ho) and expected (He) heterozygosity values and polymorphic information contents (PIC) were all calculated. 287 alleles and 559 genotypes were detected.

[Population genetic variation and structure analysis on five populations of mirror carp Cyprinus carpio L. using microsatellites].

In this paper, population genetic variability and genetic structure of five populations of an important cultivation species, mirror carp (Cyprinus carpio L.) were analyzed using 30 microsatellite loci. The observed (Ho) and expected (He) heterozygosity values, polymorphic information content (PIC) and number of effective alleles (Ae) were all determined.