Henan Normal University

About: Henan Normal University is a education organization based out in Xinxiang, China. It is known for research contribution in the topics: Catalysis & Ionic liquid. The organization has 10863 authors who have published 11077 publications receiving 166773 citations.

A C-type lectin with an immunoglobulin-like domain promotes phagocytosis of hemocytes in crayfish Procambarus clarkii.

Abstract: C-type lectins are important immune molecules that participate in host defense response. The present work reports a novel C-type lectin (PcLec3) from the red swamp crayfish Procambarus clarkii. Sequence analysis found that PcLec3 encodes a polypeptide with252 amino acid residues, which contains an immunoglobulin-like domain (IG) and a C-type lectin domain (CTLD) arranged in tandem. Tissue distribution analysis indicated that PcLec3 is enriched expressed in hemocytes and hepatopancreas cells, in which PcLec3 was up-regulated following bacterial challenge by Vibrio anguillarum. Function analysis using recombinant full-length PcLec3, IG, and CTLD proteins revealed that these recombinant proteins had the capacity to bind carbohydrates and bacteria, while IG determined the cell binding activity. However, only full-length PcLec3 promotes the phagocytic activity of hemocytes and subsequent clearance of invasive bacteria. Taken together, these results manifest that PcLec3 acts as a hemocyte adhesion molecule to promote hemocyte phagocytosis against invasive V. anguillarum.

Optomechanical second-order sidebands and group delays in a Kerr resonator

Abstract: We theoretically study high-order optomechanically induced transparency (OMIT) process in a nonlinear Kerr resonator. A frequency shift induced by the Kerr effect, is identified for the optical cavity mode, which results in asymmetric OMIT windows of the signal and its higher-order sidebands. We also find that both the sideband amplitude and its associated group delay sensitively depend on the strength of the Kerr nonlinearity. This indicates the possibility to enhance or steer the performance of OMIT devices with various nonlinear optical cavities.

Copper-Catalyzed Cross-Dehydrogenative C–N Bond Formation of Azines with Azoles: Overcoming the Limitation of Oxidizing N–O Activation Strategy

Abstract: Here, we report the copper-catalyzed C2 selective cross-dehydrogenative C–N bond formation of azines with azoles. This straightforward method enables us to address the key limitation of prior N–O activation strategy in C2 amination of azines. The wide substrate scope, high functional group tolerance, and ease of operation of the present method are expected to promote its potential application in synthetic chemistry.

Template-free synthesis of oxygen-containing ultrathin porous carbon quantum dots/g-C3N4 with superior photocatalytic activity for PPCPs remediation

Abstract: The development of facile and environmentally compatible synthetic strategies for broad-spectrum response photocatalysts is a primary goal for researchers in this area. For this study, we report on a template-free thermal treatment strategy for the synthesis of an oxygen-containing ultrathin porous carbon quantum dots/polymeric carbon nitride metal-free composites (CQD/OUPCN). Morphology characterization revealed that the thermal treatment induced bulk CQD/g-C3N4 (CQD/BCN) to transform to porous ultrathin 2D nanosheets with a high specific surface area. Chemical structure characterization revealed that O atoms were involved in the chemical composition of C3N4 following the introduction of CQD and subsequent thermal treatment. Optical and electrical characterization, as well as density functional theory (DFT) calculations, confirmed that the introduction of O atoms and CQD enabled the tuning of the intrinsic electronic state, and improved the charge transfer capacity of C3N4. Together with the up-converted fluorescence properties of CQD, the CQD/OUPCN exhibited remarkable broad-spectrum activity toward the degradation of PPCPs. Under visible light irradiation, the CQD/OUPCN-0.5% showed an 18.5 fold higher indomethacin (IDM) degradation rate than did g-C3N4. Further kinetics studies, including reactive species (RS) and degradation intermediate detection, indicated that RS, particularly O2˙−, was generated during the photocatalytic process, which could lead to the decomposition, and finally mineralization of IDM.