China Three Gorges University

About: China Three Gorges University is a education organization based out in Yichang, China. It is known for research contribution in the topics: Catalysis & Landslide. The organization has 11161 authors who have published 8011 publications receiving 82224 citations. The organization is also known as: Sanxia Daxue.

Effect of pure microcystin-LR on activity and transcript level of immune-related enzymes in the white shrimp (Litopenaeus vannamei).

Abstract: Microcystins (MCs) in freshwater and marine waters released by toxin-producing cyanobacteria have negative impacts to the aquatic environment. This study aimed to investigate the effect of pure microcystin-LR on activity and transcript level of immune-related enzymes in the white shrimp Litopenaeus vannamei. After exposed to varying concentrations of pure microcystin-LR (MC-LR) for 30 days, the activity of superoxide dismutase (SOD), lysozyme (LZM), glutathione peroxidase (GPx), peroxidase (POD), acid phosphatase (ACP), alkaline phosphatase (AKP) and transcript level of cMn-sod, lzm, gpx were investigated in the hepatopancreas of white shrimp (L. vannamei). Immune-related enzyme activities responded differently to MC-LR exposure. SOD, GPx, and POD activity in the hepatopancreas were activated in a concentration-dependent manner while LZM activity was significantly inhibited in the treatment groups. ACP and AKP activity showed an increase, followed by a decrease. The transcript levels of cMn-sod, lzm, and gpx were consistent with changes in their encoding enzyme activity. These results demonstrated that sub-chronical exposure to MC-LR induced the alteration of immune-related enzymes and corresponding genes in the hepatopancreas, which may help explain the presence of detoxification mechanisms in crustaceans and how they were protected from MC-LR stress for a long period of time.

A Terbium-Organic Framework Material for Highly Sensitive Sensing of Fe3+ in Aqueous and Biological Systems: Experimental Studies and Theoretical Analysis

Abstract: Owing to the paramount importance of iron in biological and environmental systems, advanced agents towards the detection of iron ions with high sensitivity and selectivity have been targeted for decades.Here a new super water-stable agent, namely terbium metal-organic framework (Tb-MOF), [H2N(CH3)2][Tb(cppa)2(H2- O)2],(CTGU-1, CTGU=China Three Gorges University, H2cppa=5-(4-carboxyphenyl)picolinic acid),has been successfully synthesized and demonstrated as a fluorescent turn-off sensor for highly sensitive detection of Fe3+ with the detection limit of 10−9 M in dimethylformamide (DMF), 10−7 M in water and 10−7 M in biological environment,respectively. Such detecting capacity, to our knowledge, is the best compared to those of reported lanthanide-baed MOF fluorescent probes so far. With the combination of first principle calculations, the detecting capacity has been analysed from the interaction between metal ions and organic ligands, particularly the effect of metal ions on the frontier molecular orbitals. This work offers a new Ln–MOF probe towards the detection of metal irons with high sensitivity and selectivity.

Icariin improves brain function decline in aging rats by enhancing neuronal autophagy through the AMPK/mTOR/ULK1 pathway.

Abstract: Icariin (ICA) is the main active ingredient of Epimedium brevicornu Maxim (Berberidaceae), which is used in the immune, reproductive, neuroendocrine systems, and anti-aging To evaluate the effect

Improved conductivity of a new Co(II)-MOF by assembled acetylene black for efficient hydrogen evolution reaction

Abstract: Metal–organic frameworks (MOFs) incorporating different metal nanoparticles or conductive additives are expected to possess desirable catalytic performance. Herein, we report a novel 3D microporous Co(II)-MOF, [Co1.5(TTAB)0.5(4,4′-bipy)(H2O)] (denoted CTGU-9), based on 3,4,5-tricarboxylic-(3′,4′,5′-tricarboxylazophenyl)benzene (H6TTAB) and 4,4′-bipyridine (4,4′-bipy) ligands. To improve electrical conductivity, a series of composites was integrated by the assembly of CTGU-9 and acetylene black (AB), and shows distinct electrocatalytic activity for the hydrogen evolution reaction (HER). Strikingly, the AB&CTGU-9 (3 : 4) composite exhibits superior HER performance with a very favorable onset potential of 98 mV, an overpotential of 128 mV at 10 mA cm−2, a small Tafel slope of 87 mV dec−1 and long-term stability of at least 21 h. These results indicate that the integration of MOFs with conductive cocatalysts could produce an effective candidate electrocatalyst for HER. Additionally, the gas sorption behavior for N2, CO2, and CH4 is also investigated.