A new species of Walker (Hymenoptera, Eulophidae) from China, with morphological characterizations and molecular analysis.

Walker, 1844 (Hymenoptera: Eulophidae) is an economically important genus including species acting as biocontrol agents against agromyzid leafminer pests. A new species of , Liu, Hansson & Wan, , was discovered during the identification of agromyzid leafminers and their associated parasitoid wasps collected from 2016 to 2022 in China, based on morphological characteristics and molecular analyses of COI, ITS2 and 28S genes. is similar to Zhu, LaSalle & Huang, distinguished by two interconnected infuscate vertical bands on the fore wing and the color of the scape.

A One-Step Multiplex PCR Method to Rapidly Distinguish Two Strains of Diglyphus wani (Hymenoptera: Eulophidae) Against Agromyzid Leafminers.

Hymenopteran parasitoids generally show a haplo-diploid sex determination system. Haploid males are produced from unfertilized eggs, whereas diploid females develop from fertilized eggs (arrhenotokous). In some cases, diploid females develop from unfertilized eggs (thelytokous).

Multiple Data Demonstrate That Bacteria Regulating Reproduction Could Be Not the Cause for the Thelytoky of (Hymenoptera: Eulophidae).

In Hymenoptera parasitoids, the reproductive mode is arrhenotoky, while a few species reproduce by thelytoky. The thelytoky of Hymenoptera parasitoids is generally genetically determined by the parasitoids themselves or induced by bacteria, including , , and .   (Hymenoptera: Eulophidae), a recently reported thelytokous species is a main parasitoid attacking agromyzid leafminers.

The limiting factors of oncolytic virus immunotherapy and the approaches to overcome them.

Oncolytic virus (OV) immunotherapy is characterized by viruses which specifically target cancer cells and cause their cytolysis. They provide a unique and promising new tool for the eradication of cancer as they interact with and affect the tumor microenvironment (TME), vasculature, and immune system. Advancements of genetic engineering have allowed for these viruses to be armed in such a way to have enhanced targeting, strong immunomodulation properties, and an ability to modify the TME.

Antibacterial properties of poly(quaternary ammonium) modified gold and titanium dioxide nanoparticles.

We report excellent antibacterial effect induced by amine-functionalized gold and titanium dioxide nanoparticles without external excitations. The idea originates from the excellent antibacterial property of quaternary ammonium salts. The effects of poly(quaternary ammonium) and polyacrylate sodium functional groups as nanoparticle surfactants are compared to show that poly(quaternary ammonium) functional groups are the main cause of the induced antibacterial effect.

Integration of nanoparticle cell lysis and microchip PCR for one-step rapid detection of bacteria.

This paper describes an integrated microchip system as an efficient and cost-effective solution involving Nanotechnology and Lab-on-a-Chip technology for the rapid detection of bacteria. The system is based on using surface-modified gold nanoparticles for efficient cell lysis followed by microchip PCR without having to remove the nanoparticles from the PCR solution. Poly(quaternary ammonium) modified gold nanoparticles are used to provide a novel and efficient cell lysis method without the need to go through time-consuming, expensive and complicated microfabrication processes as most of current cell lysis methods for Lab-on-a-Chip applications do.

Study of a novel cell lysis method with titanium dioxide for Lab-on-a-Chip devices.

In this paper, a novel method is proposed and demonstrated to be able to lyse gram-negative (E. coli) bacteria cells for Lab-on-a-Chip applications. The proposed method incorporates using titanium dioxide particles as photocatalysts and a miniaturized UV LED array as an excitation light source to perform cell lysis on microchips.

Size-dependent PCR inhibitory effect induced by gold nanoparticles.

In this work, the effect of gold nanoparticles (AuNPs) with diameters of around 5, 10 and 20 nm on PCR efficiency is evaluated respectively using a real-time PCR machine. Gold nanoparticles show no obvious effect on PCR at low particle concentration. When the concentration is increased, PCR inhibition is observed.

The effects of gold nanoparticles with different sizes on polymerase chain reaction efficiency.

We report the effect of 5, 10 and 20 nm gold nanoparticles (AuNPs) on polymerase chain reaction (PCR) efficiency and a proposed mechanism for AuNPs affecting the PCR. It is observed that AuNPs can cause PCR inhibition, the degree of which is affected by the concentration of the AuNPs. AuNPs of larger sizes can cause complete PCR inhibition at a lower particle concentration than those of smaller sizes.

Controlling two-dimensional movement of microparticles over an electrode array surface.

This paper presents an original microchip device that manipulates planar x- and y-positions of dielectric microbeads over an electrode array with dielectrophoresis (DEP) effects. Implemented with a simple single-layer metal process, the microchip device consists of two parallel arrays of triangular-shaped electrodes. The two arrays of electrodes are arranged such that they locked into each other to form interdigitated electrodes.