Utilization of Lysiphlebia japonica (Hymen.: Braconidae)

The soybean aphid, Aphis glycines is one of the main pests of soybean. Extensive application of chemicals results in rapid increase of resistance of A. glycines against pesticides and serious damage to the soybean incurred by the high aphid population. Of the natural enemies, Lysiphlebia japonica was found to be a dominant species during investigation. This species is distributed broadly in all the soybean-planting areas. During 5 years of wasp release experiments during 1979-1983, the parasitism rates were over 56 % with the highest up to 76 % in the soybean fields, and the soybean leaf-rolling rates were under 1 % when the soybean aphids had a medium density.Originating text in Chinese.Citation: Gao, Junfeng. (1985). Utilization of Lysiphlebia japonica (Hymen.: Braconidae). Natural Enemies of Insects, 7(3), 152-154

Biological characteristics and control effect of Lysiphlebia japonica [Hym.: Braconidae] on Aphis glycines [Hom.: Aphididae]

Lysiphlebia japonica is the vital natural enemy of soybean aphid Aphis glycines in Jilin Province. Investigation of Lysiphlebia japonica was conducted during 1979-1992, and the results were shown as follows.Originating text in Chinese.Citation: Gao, Junfeng. (1994). Biological characteristics and control effect of Lysiphlebia japonica [Hym.: Braconidae] on Aphis glycines [Hom.: Aphididae]. Chinese Journal of Biological Control, 10(2), 91-92

Observations on Paragus quadrifasciatus [Het.: syrphidae] in Tonghua County

Originating text in Chinese.Citation: Gao, Junfeng. (1991). Observations on Paragus quadrifasciatus [Het.: syrphidae] in Tonghua County. Chinese Journal of Biological Control, 7(2), 95-95

The Critical Role of Substrate in Stabilizing Phosphorene Nanoflake: A Theoretical Exploration

Phosphorene, a new two-dimensional (2D) semiconductor, has received much interest due to its robust direct band gap and high charge mobility. Currently, however, phosphorene can only be produced by mechanical or liquid exfoliation, and it is still a significant challenge to directly epitaxially grow phosphorene, which greatly hinders its mass production and, thus, applications. In epitaxial growth, the stability of nanoscale cluster or flake on a substrate is crucial. Here, we perform ab initio energy optimizations and molecular dynamics simulations to explore the critical role of substrate on the stability of a representative phosphorene flake. Our calculations show that the stability of the phosphorene nanoflake is strongly dependent on the interaction strength between the nanoflake and substrate. Specifically, the strong interaction (0.75 eV/P atom) with Cu(111) substrate breaks up the phosphorene nanoflake, while the weak interaction (0.063 eV/P atom) with h-BN substrate fails to stabilize its 2D structure. Remarkably, we find that a substrate with a moderate interaction (about 0.35 eV/P atom) is able to stabilize the 2D characteristics of the nanoflake on a realistic time scale. Our findings here provide useful guidelines for searching suitable substrates for the directly epitaxial growth of phosphorene

Protection of Overwintering Aphid Parasitoid, Lysiphlebia japonica [Hym.: Aphidiidae]

Tonghua County is located in the Changbaishan mountain area where there are about 130 days yearly with average temperature below 0ºC and the lowest temperature can reach - 35ºC. To understand the natural survival of overwintering Lysiphlebia japonica, we observed the survival of overwintering parasitoids and carried out overwintering protection experiments.Originating text in Chinese.Citation: Gao, Junfeng, Yu, Kai. (1991). Protection of Overwintering Aphid Parasitoid, Lysiphlebia japonica [Hym.: Aphidiidae]. Chinese Journal of Biological Control, 7(4), 188-189

Synthesis, Properties, and Their Potential Application of Covalent Organic Frameworks (COFs)

Covalent organic frameworks (COFs) represent an emerging class of crystalline porous polymers, which are ingeniously assembled with organic building blocks through reversible covalent bonds. The well-defined crystalline porous structures, easy functional modification, high surface area, together with structural designability and diversity have offered the COFs superior potential in various applications, such as catalysis, gas adsorption and separation, and optoelectricity. Since the pioneer work of Omar Yaghi in 2005, this field has developed rapidly and attracted much attention from researchers with diverse expertise. In this chapter, we describe the basic design concepts, the recent synthetic advancements, and the frontiers of functional exploration in gas adsorption and storage. Special emphasis is placed on their potential application in heterogeneous catalysis field. Finally, the prospects of COFs and remaining issues in these fields are indicated

Self-protected nanoscale thermometry based on spin defects in silicon carbide

Quantum sensors with solid state electron spins have attracted considerable interest due to their nanoscale spatial resolution.A critical requirement is to suppress the environment noise of the solid state spin sensor.Here we demonstrate a nanoscale thermometer based on silicon carbide (SiC) electron spins.We experimentally demonstrate that the performance of the spin sensor is robust against dephasing due to a self protected machenism. The SiC thermometry may provide a promising platform for sensing in a noisy environment ,e.g. biological system sensing