A novel catalyst of Ni–Mn complex oxides supported on cordierite for catalytic oxidation of toluene at low temperature

Qiong Huang,Zhi-Yuan Zhang,Wen-Jiao Ma,Ying-Wen Chen,She-Min Zhu,Shu-Bao Shen 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.2

The catalytic combustion of toluene over Ni–Mn mixed complex supported on industrial cordierite was investigated. The catalysts were prepared by the wet impregnation method and characterized by using the Brunauer Emmett Teller (BET), Scanning Electron Microscopy (SEM), X-ray diffraction (XRD),Transmission Electron Microscope (TEM) and X-ray fluorescence (XRF). The catalytic activity toward the complete oxidation of toluene to CO2 and H2O strongly depended on the molar ratio of Ni/Mn, loading amount of Ni–Mn oxides, and calcination temperature. All the results above indicated that the Ni–Mn complex oxide catalyst calcined at 400 8C with 0.5 mol ratio of Ni/Mn, 10 wt.% loading amounts, and showed the highest activity as complete oxidation of toluene.

Activity and stability of Pd/MMnOx (M = Co, Ni, Fe and Cu) supported on cordierite as CO oxidation catalysts

Qiong Huang,Shu-Bao Shen,Xiaokang Yan,Bing Li,Xiaoliang Xu,Ying-Wen Chen,She-Min Zhu 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.2

Several catalysts of the general formula, MMnOx (M = Co, Ni, Fe and Cu), were synthesised through the impregnation method; their activities were shown to be enhanced by the addition of a small amount of Pd (0.01–0.1 wt%). These catalysts exhibit different activities for the catalytic oxidation of CO, due to the different valence states of various transition metal oxides. The introduction of Pd prominently enhanced both the reduction and oxidation capabilities of the catalysts. These catalysts were optimised for oxidation activities by designing orthogonal experiments. Based upon the catalysts’ properties, the stability of these samples and their ability to resist steam over Pd/CoMnOx/cordierite were investigated.

Pratensein glycoside attenuates respiratory syncytial virus infection-induced oxidative and inflammatory injury via TGF-β signaling pathway

Zhang Qiong,Li Si,Huang Qiong 대한독성 유전단백체 학회 2022 Molecular & cellular toxicology Vol.18 No.3

Background Respiratory syncytial virus (RSV)-induced oxidative stress and inflammation are the leading causes of many severe diseases, especially in infants and children. Although many studies focused on the mechanism during RSV infection, an effective therapy is still urgently needed. Objectives In our study, we examined the function of pratensein glycoside (PG) in the progression of RSV-induced infection in vitro. Results PG treatment significantly inhibited RSV-induced oxidative stress and inflammation in a dose-dependent manner. We found that 40 μM of PG had no signifi cant cytotoxicity and exerted an anti-viral eff ect. RSV infection led to the activation of the TGF-β signaling pathway, which in turn promoted RSV infection. We hyperactivated the TGF-β signaling pathway by TGF-β and found that PG treatment can repress the pro-inflammation eff ect of TGF-β, suggesting that PG inhibits RSV infection through inhibiting TGF-β signaling pathway. Conclusions PG attenuated RSV infection-induced oxidative stress and inflammation through inhibiting the TGF-β signaling pathway. This study provides evidence for the application of traditional Chinese herbal medicine in the treatment of viral infection.

Preparation of Non-Planar-Ring Epoxy Thermosets Combining Ultra-Strong Shape Memory Effects and High Performance

Qiong Li,Songqi Ma,Jingjing Wei,Sheng Wang,Xiwei Xu,Kaifeng Huang,Binbo Wang,Wangchao Yuan,Jin Zhu 한국고분자학회 2020 Macromolecular Research Vol.28 No.5

Non-planar-ring epoxies together with non-planar-ring hardeners could achieve thermosets combining ultra-high shape recovery speed and excellent thermal properties. High shape recovery speed reflected high efficiency, and could decrease the energy consumption and the harmful effect of external stimuli on the materials, while it often conflicts with the thermal properties of shape memory polymers. In this paper, for the first time, epoxy resins with the super-short shape recovery time within 3 s were developed from non-planar-ring epoxies and hardeners, and their glass transition temperature (T g) were ~127 °C much higher than their benzene ring analogues. The effects of non-planar-ring structures of the epoxies and hardeners on the curing behavior, thermal properties as well as the shape memory properties of the thermosets were systematically investigated; the structure-property relationships were disclosed with the help of computational simulation of structure parameters and ESP maps. The faster shape recovery speed of the non-planar-ring epoxy thermosets is from their higher molecular mobility contributed by the conformational transition of non-planar-rings as well as their higher recovery force compared with benzene ring analogs. Their higher T gs are from the steric hindrance by the larger molecular volume of the non-planar-rings than benzene ring. This work will provide an effective method to produce shape memory polymers with excellent shape memory effects and high performance.

Optimized Assembly of Micro-/Meso-/Macroporous Carbon for Li–S Batteries

Qiong Tang,Heqin Li,Min Zuo,Jing Zhang,Yiqin Huang,Peiwen Bai,Jiaqi Xu,Kuan Zhou 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.2

In order to explore the effect of hierarchical porous carbon on the performances of Li–S batteries, we synthesized three kinds of micro-/meso-/macroporous carbon materials with different pore properties by facile hard-template method. Different from the majority of reports on porous carbon ensuing large specific surface area (SSA) and total pore volume, it was found that in the case of identically high sulfur content, the pore size distribution substantially influences the performances of Li–S batteries rather than the SSA and total pore volume. Furthermore, in the assembly of micro-/meso-/macropores, the micropore volume ratio to the total pore volume is dominant to the capabilities of batteries. Among the samples, the porous carbon carbonized with the precursor of sucrose at 950℃ presents the highest initial discharge specific capacity of 1327 mAh/g and retention of 630 mAh/g over 100 cycles at 0.2C rate along with the best rate capability. This sample possesses the largest micropore volume ratio of 47.54% but a medium SSA of 1217 m2 /g and inferior total pore volume of 0.54 cm3 /g. The abundant micropores effectively improve the conductivity of dispersed sulfur particles, inhibit the loss of sulfur series and enable the cathode to exhibit superior electrochemical performances.

A Novel Method to Suppress Mid-Frequency Vibrations with a High Speed-Loop Gain for PMSM Control

Qiong Li,Qiang Xu,Shenghua Huang 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.3

PI controllers are one of the most widely used controllers in industrial control systems due to their simple algorithms and stability. The parameters Kp and Ki determine the performance of the system response. The response is expected to improve by increasing the gain of the PI controller. However, too large a gain will accelerate the speed response and cause vibrations, which is not what is expected. This paper proposes a way to suppress vibrations by detecting the vibration frequency and extracting the vibration signal as a compensation to the speed feedback. Additionally, in order to improve its disturbance rejection ability, a low-order disturbance observer is proposed. This paper also explains the operation principle of the proposed method by analyzing the transfer function and it describes the design of the controller parameters in detail. Simulation and experimental results are provided to verify the merits of the proposed method. These results also show the good performance of the proposed method. It has a rapid response and suppresses vibrations.

Well-defined nanostructured core–shell magnetic surface imprinted polymers (Fe3O4@SiO2@MIPs) for effective extraction of trace tetrabromobisphenol A from water

Qiong Wu,Minna Li,Zheng Huang,Yanming Shao,Lei Bai,Lincheng Zhou 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.60 No.-

Magnetic molecular imprinted polymers (MIPs) with well-defined core–shell nanostructure for extracting tetrabromobisphenol A (TBBPA) have been fabricated by surface molecular imprinting method. Fe3O4@SiO2@MIPs exhibit the good adsorption capacity, high recognition ability and fast kinetics to TBBPA. The maximum adsorption capacity of Fe3O4@SiO2@MIPs towards TBBPA is 88.3 mg g−1, which is 2.3 times as high as that of Fe3O4@SiO2@NIPs. Besides, the material has the short equilibrium time (40 min), the rapid magnetic separation (15.6 emu g−1, 20 s) and the high stability (the adsorption efficiency is at least 85% after seven cycles).

Weight Gain during Neoadjuvant Chemotherapy is Associated with Worse Outcome among the Patients with Operable Breast Cancer

Qiong Fang,Jiahui Huang,Lu Gan,Kunwei Shen,Xiaosong Chen,Beiwen Wu 한국유방암학회 2019 Journal of breast cancer Vol.22 No.3

Purpose: This study was aimed at identifying the influence of initial weight and weight change during neoadjuvant chemotherapy (NAC) on pathologic complete response (pCR) and long-term survival in Chinese patients with operable breast cancer. Methods: We conducted a retrospective study using data from 409 female patients who received NAC for stage II or III breast cancer and had complete record of body mass index (BMI) before and after NAC. BMI of < 25 kg/m2 was categorized as normal weight/underweight (NW/UW); 25.0–29.9 kg/m2 was categorized as overweight (OW); ≥30 kg/m2 was categorized as obese (OB). BMI change was defined as the difference in BMI between day 1 of the first cycle of NAC and the day before surgery. A BMI gain or loss of > 2 kg/m2 following NAC was considered to be significant, else was considered stable. The study end points included pCR rates, disease-free survival (DFS), and overall survival (OS). Results: The median follow-up time was 43.2 (8.9–93.6) months. The average BMI was 23.40 ± 3.04 kg/m2 before NAC and 23.66 ± 3.02 kg/m2 after NAC (t = −3.604, p < 0.001). The pCR rate was 25.3% in the NW/UW group and 24.1% in the OW/OB group (p = 0.811), and was similar between the BMI-gain (23.3%) and the BMI-stable/loss (25.1%) groups (p = 0.787). Initial BMI was an independent prognostic factor for DFS (hazard ratio, 1.69; 95% confidence interval [CI], 1.13–2.53; p = 0.011) but not for OS, while BMI-gain was an independent prognostic factor for both DFS (hazard ratio, 2.09; 95% CI, 1.28–3.42; p = 0.003) and OS (hazard ratio, 1.97; 95% CI, 1.04–3.74; p = 0.039). Conclusion: BMI increased after NAC in Chinese breast cancer patients. Initial BMI and BMI change during NAC were not associated with pCR but were reversely associated with survival.

Recent insights into autophagy and metals/nanoparticles exposure

Li Qiong,Feng Yajing,Wang Ruike,Liu Rundong,Ba Yue,Huang Hui 한국독성학회 2023 Toxicological Research Vol.39 No.3

Some anthropogenic pollutants, such as heavy metals and nanoparticles (NPs), are widely distributed and a major threat to environmental safety and public health. In particular, lead (Pb), cadmium (Cd), chromium (Cr), arsenic (As), and mercury (Hg) have systemic toxicity even at extremely low concentrations, so they are listed as priority metals in relation to their significant public health burden. Aluminum (Al) is also toxic to multiple organs and is linked to Alzheimer’s disease. As the utilization of many metal nanoparticles (MNPs) gradually gain traction in industrial and medical applications, they are increasingly being investigated to address potential toxicity by impairing certain biological barriers. The dominant toxic mechanism of these metals and MNPs is the induction of oxidative stress, which subsequently triggers lipid peroxidation, protein modification, and DNA damage. Notably, a growing body of research has revealed the linkage between dysregulated autophagy and some diseases, including neurodegenerative diseases and cancers. Among them, some metals or metal mixtures can act as environmental stimuli and disturb basal autophagic activity, which has an underlying adverse health effect. Some studies also revealed that specific autophagy inhibitors or activators could modify the abnormal autophagic flux attributed to continuous exposure to metals. In this review, we have gathered recent data about the contribution of the autophagy/mitophagy mediated toxic effects and focused on the involvement of some key regulatory factors of autophagic signaling during exposure to selected metals, metal mixtures, as well as MNPs in the real world. Besides this, we summarized the potential significance of interactions between autophagy and excessive reactive oxygen species (ROS)-mediated oxidative damage in the regulation of cell survival response to metals/NPs. A critical view is given on the application of autophagy activators/inhibitors to modulate the systematic toxicity of various metals/MNPs.

Characteristics and Validation of a Recommended Fertilization Approach for Lychee Based on Yield Response and Agronomic Efficiency

Yi Qiong,Li Guoliang,Tang Shuanhu,Huang Xu,Pang Yuwan,Zhang Mu 한국원예학회 2022 원예과학기술지 Vol.40 No.4

Lychee is one of the most popular tropical fruits in South China. However, excess fertilizer application is reducing soil productivity and lychee production. Little information is available to develop a rational and feasible recommended fertilization approach for lychee. This study aimed to optimize fertilizer management for lychee production with a nutrient recommendation model that simplifies complex principles of fertilization into a user-friendly “nutrient expert (NE)” system. Analyses of extensive database for lychee revealed that the average yield responses (YRs) of lychee to nitrogen (N), phosphorus (P), and potassium (K) were 4.2 t ha-1, 3.0 t ha-1, and 4.3 t ha-1, respectively. The average relative yields (RYs) of lychee for N, P, and K were 0.73, 0.80, and 0.77, respectively. The mean values of soil indigenous nutrient supply for N, P, and K were 52.4 kg ha-1, 5.7 kg ha-1, and 44.2 kg ha-1, respectively. The average agronomic efficiencies (AEs) were 15.8 kg N kg-1, 62.8 kg P kg-1, and 18.2 kg K kg-1, respectively. The YR and AE of N, P and K were well fitted by quadratic equations. Significant negative exponential correlations were detected between the YR and the indigenous nutrient supply. A significant negative linear correlation was detected between YR and RY in lychee production. In validation experiments, the NE approach outperformed farmers’ practices in terms of yield, output-input ratio, the net return, and N use efficiency. The NE system is a feasible approach to making fertilization recommendations for small-scale lychee farmers without the need for testing.