WATER RESEARCH
·
2023
·
IF 12.8
Wei-Ran Han,Wen-Long Wang,Tie-Jun Qiao,Wei Wang,Hang Su,Chen-Xin Xu,Qian-Yuan Wu
Micro-bubble aeration is an efficient way to promote ozonation performance, but the technology is challenged by extensive energy cost. Here, a ceramic ultrafiltration membrane was used to achieve ozone micro-bubble (0–80 µm) aeration in a simple way at gaseous pressures of 0.14–0.19 MPa. Compared with milli-bubble aeration, micro-bubble aeration increased the equilibrium aquatic O 3 concentrations by 1.53–3.25 times and apparent O 3 transfer rates by 3.12–3.35 times at pH 5.0–8.0. Consequently, the • OH yield was 2.67–3.54 times via faster O 3 transfer to the aquatic solution followed by decomposition rather than interfacial reaction. Ozone micro-bubble aeration outperformed milli-bubble aeration, with the degradation kinetics of 2,4-D being 3.08–4.36 times higher. Both O 3 -oxidation and • OH oxidation were important to the promotion with the contributions being 35.8%-45.9% and 54.1%-64.2%, respectively. The operational and water matric conditions influenced the oxidation performance via both O 3 oxidation and • OH oxidation, which is reported for the first time. In general, the ceramic membrane offered a low-energy approach of ozone micro-bubble aeration for efficient pollutant degradation. The O 3 oxidation and • OH oxidation were proportionally promoted by ozone micro-bubble due to O 3 transfer enhancement. Thus, the promotive mechanism can be interpreted as the synchronous enchantment on ozone exposure and • OH exposure for the first time.
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Food & Function
·
2023
·Vol. 14
·期 9
·4228-4241
·
IF 6.1
Tingting Li,Like Lin,Cong Li,Jingyi Zheng,Bang Chen,Yehua Shen,Difeng Ren
In this work, RLWPF (Arg-Leu-Trp-Pro-Phe) and VLRLF (Val-Leu-Arg-Leu-Phe) were investigated for the effects against D-galactose (D-gal) induced cognitive impairment by modulating the gut microbiota composition. The effects on serum metabolite production were further investigated. The two novel peptides derived from walnut protein alkaline protease hydrolysates were predicted by docking to acetylcholinesterase (AChE) with the highest binding affinities, −10.3 and −9.9 kcal mol−1, considered as the potential neuroprotective peptides. In behavioral experiments, RLWPF and VLRLF treatment significantly restored spatial learning and memory impairment induced by D-gal. The results showed that RLWPF and VLRLF could alleviate cholinergic dysfunction, oxidative stress, and inflammation to varying degrees caused by D-gal-induced aging. Furthermore, 16S rRNA analysis revealed that RLWPF and VLRLF treatment improved cognitive impairment by regulating the composition of the gut microbiota and the abundance of harmful bacteria, including the ratio of Firmicutes to Bacteroidetes, Helicobacter, Allobaculum, Alistipes, Mucispirillum, and Odoribacter. In addition to the same regulation, RLWPF and VLRLF had their marker and regulatory flora. Studies based on the gut microbiota would allow a better understanding of the neuroprotective effects of walnut-derived peptides, supporting that walnut-derived peptides could be potential functional ingredients in foods and nutraceuticals or drug candidates in the treatment of cognitive dysfunction.
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Small
·
2023
·Vol. 19
·期 25
·2300621
·
IF 13.3
Wei Wu,Runzhe chen,Suhao Chen,Zichen Wang,Niancai Cheng
Tuning the d-orbital electronic configuration of active sites to achieve well-optimized adsorption strength of oxygen-containing intermediates toward reversible oxygen electrocatalysis is desirable for efficient rechargeable Zn-Air batteries but extremely challenging. Herein, this work proposes to construct a Co@Co 3 O 4 core–shell structure to regulate the d-orbital electronic configuration of Co 3 O 4 for the enhanced bifunctional oxygen electrocatalysis. Theoretical calculations first evidence that electron donation from Co core to Co 3 O 4 shell could downshift the d-band center and simultaneously weak spin state of Co 3 O 4 , result in the well-optimized adsorption strength of oxygen-containing intermediates on Co 3 O 4 , thus contributing a favor way for oxygen reduction/evolution reaction (ORR/OER) bifunctional catalysis. As a proof-of-concept, the Co@Co 3 O 4 embedded in Co, N co-doped porous carbon derived from thickness controlled 2D metal-organic-framework is designed to realize the structure of computational prediction and further improve the performance. The optimized 15Co@Co 3 O 4 /PNC catalyst exhibits the superior bifunctional oxygen electrocatalytic activity with a small potential gap of 0.69 V and a peak power density of 158.5 mW cm −2 in ZABs. Moreover, DFT calculations shows that the more oxygen vacancies on Co 3 O 4 contribute too strong adsorption of oxygen intermediates which limit the bifunctional electrocatalysis, while electron donation in the core–shell structure can alleviate the negative effect and maintain superior bifunctional overpotential.
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ORGANIC ELECTRONICS
·
2023
·
IF 3.2
Di Zhao,Qiuhong Cui,Xingyu Zhang,Hongyu Ji,Xin Liu,Liang Qin,Yuanyuan Hu,Yanbing Hou,Yufeng Hu,Zhidong Lou,Feng Teng
Organic salt doping is an effective method to control the electrical properties of organic semiconductor materials, while its underlying mechanism remains to be studied. In this work, we report the improvement of organic field-effect transistor (OFET) performance by doping the D-A polymer semiconductor PTB7-Th with organic salts. The underlying mechanism of PTB7-Th's organic salt doping in OFETs has been explored to fill the existing research gap. The doping of organic salts can improve the hole mobility of the device and change the threshold voltage . In addition, at low doping ratios, the on-off ratio of the device is not sacrificed but remains unchanged. Finally, we have made a series of characterizations of the properties of doped polymers through absorption, EPR , and UPS , which provide specific guidelines for modifying D-A polymer devices.
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ChemistrySelect
·
2022
·Vol. 7
·期 45
·e202203721
·
IF 2.307
Weihua Yu,Jianhua Kuang,Qingqing Hu,Zhonghua Wang,Yunwen Liao,Zhengjun Cheng
Graphical A new ratio fluorescent probe (RF-probe) based on the mixing of red-emitting D-penicillamine (DPA) stabilized copper nanoclusters (DPA-CuNCs) with pyridoxal 5’-phosphate (PLP) was designed for sensitive and selective determination of Al 3+ . The excess accumulation of nonessential Al 3+ in the human body can cause serious health problems, thus there is significant interest in the detection of Al 3+ . A new ratio fluorescent probe (RF-probe) based on the mixing of red-emitting D-penicillamine (DPA) stabilized copper nanoclusters (DPA-CuNCs) with pyridoxal 5’-phosphate (PLP) was designed for sensitive and selective determination of Al 3+ . The −CHO group of PLP is expected to form an imine linkage with the free −NH 2 group available of the DPA on the surface of DPA-CuNCs. The content of Al 3+ could be mensurated by the as-prepared RF-probe with a linear response in the range of 1.33–46.67 μmol ⋅ L −1 , and corresponding limit of detection (LOD) was calculated to be 0.33 μmol ⋅ L −1 . Moreover, the RF-probe was successfully extended to the assay of Al 3+ in aluminum carbonate chewing tablets, baking powder, pond water and drink water with satisfactory results compared to the standard atomic absorption spectroscopy (AAS).
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CARBOHYDRATE RESEARCH
·
2023
·
IF 3.1
Kai Wang,Yunfei Xiao,Changchun Wu,Yimo Feng,Zhipeng Liu,Xi Zhu,Hongjun Zang
3-Acetylamino-5-acetylfuran (3A5AF) is an important nitrogen-containing fine chemical with broad application prospects and high research value. Herein, we report a novel method for the conversion of N-acetyl- d -glucosamine (NAG) to 3A5AF in the choline chloride-based deep eutectic solvents (DESs). The catalytic activities of various DESs have been smoothly screened, and DES 2 (choline chloride/PEG-200/boronic acid = 1/1/0.5) displayed the best catalytic performance. In the absence of any additional solvent, catalyst and additive, product 3A5AF was obtained in 18.3% yield after reacting at 180 °C for 15 min under atmospheric condition. In addition, DES 2 showed a good reusability. The possible reaction pathway was elucidated on the basis of the results of LC-MS and 13 C NMR spectra. This study provided a new perspective for the application of DES in the conversion of chitin biomass.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Yimei Zheng,Chengang Zhao,Boyu Chen,Hui Teng,Chao Ai,Lei Chen
In the present study, D-α-Tocopherol polyethylene glycol 1000 succinate-based self-microemulsifying drug delivery systems (TPGS-SMEDDS) were introduced to enhance the solubility and stability of luteolin. The ternary phase diagrams were constructed to obtain the maximum area of microemulsion and suitable formulations of TPGS-SMEDDS. The particle size distribution and polydispersity index of selected TPGS-SMEDDS were analyzed to be less than 100 nm and 0.4, respectively. The thermodynamic stability results suggested that the TPGS-SMEDDS was stable during the heat-cool and freeze–thaw cycle. Moreover, the TPGS-SMEDDS exhibited excellent encapsulation capacity (51.21 ± 4.39 to 85.71 ± 2.40%) and loading efficiency (61.46 ± 5.27 to 102.86 ± 2.88 mg/g) to luteolin. In addition, the TPGS-SMEDDS showed an admirable vitro release ability with a ratio of more than 88.40 ± 1.14% for luteolin in 24 h. Therefore, TPGS-based SMEDDS might provide an effective role for the oral administration of luteolin and holds promise as a potential delivery for poorly soluble bioactive compounds.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Haijun Sun,Baohao Zhang,Lu Lu,Ziyan Chen,Yaqing Huo,Wenqing Li,Bao Zhang,Jian Song
Eutectogel-based soft materials demonstrate great potential for application in the field of wearable devices. However, the development of multifunctional eutectogel materials as versatile sensors for wearable devices with excellent stretchability, self-healing, stability over a wide temperature range, and adhesion remains a challenge. In this study, we construct a novel dual-network (DN) eutectogel comprising a d -gluconic acetal-based supramolecular network and a polymer network in a deep eutectic solvent. The DN eutectogel exhibited excellent comprehensive properties, such as remarkable stretchability (elongation at break over 4300 %, tensile fracture strain of 0.21 MPa), self-recovery and fatigue resistance, rapid self-healing, outstanding stability over a wide range of temperatures (−20–100 ℃), robust adhesion, and good conductivity. Based on these comprehensive properties and thermosensitive capacity, a temperature sensor based on the DN eutectogel was developed with a high sensitivity of 8.1–65.0 % °C −1 . In addition, wearable strain and pressure sensors based on this eutectogel with high sensitivity, wide monitoring range, and excellent stability were fabricated for precise real-time monitoring of human activities. This study paves the way for the design of multifunctional wearable devices in the future.
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CHEMISTRY & BIODIVERSITY
·
2022
·Vol. 19
·期 10
·e202200648
·
IF 2.745
Xiao-San Li,Mao-Xun Yang,Yu-Hao Luo,He-Hui Zhan,Mei-Fang Chen,Yong-Mei Huang,Li Liu,Xue-Mei Yang
A series of novel D-ring fused or substituted steroidal N-heterocycles were synthesized, and their chemical structures were characterized by spectroscopic analysis. The anticancer activity of these compounds against four human cancer cell lines (MCF-7, H1299, HeLa and HepG2) were evaluated and the structure-activity relationship (SAR) was also investigated. Compound 3c displayed significant inhibitory activity on the four cancer cells with IC 50 values ranging from 3.88 to 10.05 μM. Overall, these studies indicated that construction of N-heterocyclic system with D-ring substituted containing a double bond at C-16 and C-17 or D-ring fused with [17,16-d]azolo[1,5-a]pyrimidine could be a promising strategy to improve antitumor activity for steroids deserved further investigation. Graphical
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Polymer-Plastics Technology and Materials
·
2022
·
IF 2.439
Wenqiang Wang,Yiming Gong,Qingxia Huang,Liuzemu Li,Airong Xu,Rukuan Liu
Green polyvinyl alcohol/poly(D,L-lactide-co-glycolide) (PVA/PLGA) composite materials were developed by dissolving PVA and PLGA in hexafluoroisopropanol (HFIP), followed by the subsequent layout of PVA/PLGA/HFIP liquid film and the removal of HFIP. Interestingly, the PVA/PLGA composite materials display remarkedly enhanced tensile strength, elongation at break, biodegradability and biocompatibility. Systematic investigations have been completed to reveal the effects of PVA/PLGA mass ratio on the tensile strength, elongation at break, biodegradability and biocompatibility. Meanwhile, the morphology, crystallinity and chemical structure of the PVA/PLGA material and possible interaction between PVA and PLGA are also investigated using scanning electron micrograph, infrared spectra and X-ray diffraction techniques.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Dongbo Wang,Ying Wang,Yuan Li,Ting Shi,Dandan Han,Junbo Gong
Impurity sugars produced in upstream process of functional sugars are significantly impacting the product quality. In this work, the effect of congeners ( d -maltose ( d -MAL), d -fructose ( d -FRU), d -glucose ( d -GLU)) on primary and secondary nucleation of d -tagatose ( d -TAG) crystals was investigated. The impurity sugars showed an inhibition on primary nucleation of d -TAG crystals, while a promotion on the secondary nucleation of d -TAG. Interestingly, the impact of impurity sugars on d -TAG crystal growth was similar to that on primary nucleation. The diffusion ability, hydrogen bonding forming ability, interaction energy of d -TAG crystal surfaces and impurity sugars were evaluated by molecular dynamics (MD) simulations to reveal the nucleation and growth behavior. Based on the above findings, we designed the d -TAG crystallization experiments, and obtained d -TAG crystals with uniform particle size distribution and regular morphology. This study helps to understand the influence of impurity sugars on crystallization, guiding the industrial manufacturing of functional sugars.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 21
·10062-10066
·
IF 3.925
Yongrui He,Bing Zheng,Meiling Qi,Lijun Huo
This work reports the separation performance of a new π-conjugated copolymer (PBDB-T) with alternating electron-donor and electron-acceptor units as the stationary phase for capillary gas chromatography (GC). To date, they have not been explored in the field of chromatography. The PBDB-T column exhibited a column efficiency of 3850 plates m−1 determined by n-dodecane at 120 °C and high-resolution performance toward a wide range of aromatic isomers, particularly halobenzenes, phenols, anthracene and phenanthrene. Moreover, it showed excellent separation repeatability and reproducibility in terms of run-to-run, day-to-day and column-to-column and good thermal stability. This work demonstrates the good potential of the indicated D–A copolymer as a new class of stationary phase for chromatographic analyses.
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