GLYCOCONJUGATE JOURNAL
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2022
·Vol. 39
·期 1
·131-141
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IF 3.009
Pan Hao-Yu,Zhang Chun-Qian,Zhang Xiu-Qi,Zeng Hui,Dong Chun-hong,Chen Xia,Ding Kan
Abstract Antibiotic-associated diarrhea (AAD) is a common side-effect of antibiotic treatment resulting from an imbalance in the colonic bacteria. The hypothesis of this study is to ask whether polysaccharide from the rhizome of Dioscorea opposita which is recorded as conventional herbs and food for diarrhea treatment in Southeast Asia, may be an active compound against diarrhea induced by antibiotics. To address, firstly, a homogenous polysaccharide, DOP0.2-S-3 was characterized as a homogalacturonan containing linear repeating units of → 4)-α- D -GalA p (1 → 4)-α- D -GalA p (1 → with the average molecular weight of 14 kDa. DOP0.2-S-3 significantly reduced the water content and defecation times caused by AAD in mice, while it also remarkably attenuated the cytokines of IL-1β and IL-6 expression in mice colon tissues. DOP0.2-S-3 decreased potential pathogen and increased Bacteroidetes in the mice gut. These results suggested DOP0.2-S-3 might be a new leading compound for the functional foods or drug candidate development against AAD partially through regulating gut flora. Graphical abstract
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Nature Communications
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2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Liu Yuncong,Chen Tao,Jin Zhekai,Li Mengxue,Zhang Dongdong,Duan Lian,Zhao Zhiguo,Wang Chao
Gelatinous underwater invertebrates such as jellyfish have organs that are transparent, luminescent and self-healing, which allow the creatures to navigate, camouflage themselves and, indeed, survive in aquatic environments. Artificial luminescent materials that can mimic such functionality can be used to develop aquatic wearable/stretchable displays and water-resistant devices. Here, a luminescent composite that is simultaneously transparent, tough and can autonomously self-heal in both dry and wet conditions is reported. A tough, self-healable fluorine elastomer with dipole–dipole interactions is synthesized as the polymer matrix. It exhibits excellent compatibility with metal halide perovskite quantum dots. The composite possesses a toughness of 19 MJ m −3 , maximum strain of 1300% and capability to autonomously self-heal underwater. Notably, the material can withstand extremely harsh aqueous conditions, such as highly salty, acidic (pH = 1) and basic (pH = 13) environment for more than several months with almost no decay in mechanical performance or optical properties.
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JOM
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2022
·Vol. 74
·期 5
·1958-1968
·
IF 2.597
Luo Yinbo,He Dongfeng
Indirect carbonation as an efficient CO 2 sequestration strategy has received extensive attention in recent years. This study proposes a two-step leaching indirect carbonation process using NH 4 Cl and CH 3 COOH in order to combine the advantages of the two leaching agents to obtain a better experimental outcome. The experimental results show that NH 4 Cl has a high pH buffering capacity, which can increase the pH of the mixed leachate to an alkaline level. Among the 21 groups of mixed leachate, 17 were alkaline (pH > 7). The mixed leachate has a high Ca 2+ ions carbonation rate under low CH 3 COOH concentration conditions, and the carbonation rate of steel slag with a particle size of < 38 μm can reach 60% when the CH 3 COOH concentration is 0.1 M. SEM imaging showed that the CaCO 3 formed by the reaction exists in a hexagonal calcite crystal form.
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2022
·Vol. 101
·期 3
·519-528
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IF 2.606
Li Xiaohua,Yang Zichun,Shao Huilong,Li Kunfeng,Fei Zhifang
In this paper, PI-reinforced polymethylsiloxane aerogels composites were prepared by using methyltriethoxysilane (MTES) as precursor and polyimide fibers as reinforcement phase in the aqueous solvent system through acid-base two-step method and CO 2 supercritical drying method. The effects of changes in the length and content of PI fibers on the thermal, mechanical, and sound insulation properties of the aerogel composites were systematically studied. The PI fiber is tightly bonded with the flexible aerogel substrate, showing good thermal properties. The density of the prepared samples is between 0.05 and 0.20 g/cm 3 , and the thermal conductivity is between 0.021 and 0.026 W/(m K). The thermal conductivity of samples decreases with the increase of fiber length and increases with the increase of PI fiber content, and the initial thermal decomposition temperature reaches 522.1 °C. During the compression test, PI-reinforced polymethylsiloxane aerogels did not crack in the 20% deformation compression process, and the rebound rate was between 44 and 46%, which was little affected by the reinforcing phase. The maximum compressive strength was 0.023 MPa, which was 1.4 times that of the polymethylsiloxane aerogel without adding reinforcing phase. The sound insulation property of PI simple with density around 52 mg/cm 3 is mainly affected by fiber content and length change in low-frequency region, and the sound transmission loss of the sample with 3 mm and 2 wt% PI fibers reaches 18 dB at 500 Hz.
Graphical abstract
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-8
·
IF 17.694
Ding Baofu,Zeng Pengyuan,Huang Ziyang,Dai Lixin,Lan Tianshu,Xu Hao,Pan Yikun,Luo Yuting,Yu Qiangmin,Cheng Hui-Ming,Liu Bilu
Transparent hydrogels are key materials for many applications, such as contact lens, imperceptible soft robotics and invisible wearable devices. Introducing large and engineerable optical anisotropy offers great prospect for endowing them with extra birefringence-based functions and exploiting their applications in see-through flexible polarization optics. However, existing transparent hydrogels suffer from limitation of low and/or non-fine engineerable birefringence. Here, we invent a transparent magneto-birefringence hydrogel with large and finely engineerable optical anisotropy. The large optical anisotropy factor of the embedded magnetic two-dimensional material gives rise to the large magneto-birefringence of the hydrogel in the transparent condition of ultra-low concentration, which is several orders of magnitude larger than usual transparent magnetic hydrogels. High transparency, large and tunable optical anisotropy cooperatively permit the magnetic patterning of interference colours in the hydrogel. The hydrogel also shows mechanochromic and thermochromic property. Our finding provides an entry point for applying hydrogel in optical anisotropy and colour centred fields, with several proof-of-concept applications been demonstrated.
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APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
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2022
·Vol. 106
·期 5
·2007-2015
·
IF 5.56
Dong Shuang,Fan Donglin,Liu Qian,Meng Yinyin,Liu Xinyu,Yang Sen,Lin Hui,Li Na,Chen Hongge
Abstract Styrene monooxygenases (SMOs) are powerful enzymes for the synthesis of enantiopure epoxides, but these SMOs have narrow substrate spectra, and the residues in controlling enantioselectivity of SMOs remains unclear. A monooxygenase from Herbaspirillum huttiense ( Hh MO) was found to have excellent enantioselectivities and diastereoselectivities in the epoxidation of unconjugated terminal alkenes. Here we found that Hh MO could also transfer styrene into styrene epoxide with 75% ee, and it could also catalyze the epoxidation of styrene derivatives into the corresponding epoxides with enantioselectivities up to 99% ee. Meanwhile, site 199 in the substrate access channel of Hh MO was found to play an important role in the controlling enantioselectivity of the epoxidation. The E199L variant catalyzed the epoxidation of styrene with > 99% ee. The identification of critical residue that affects the enantioselectivity of SMOs would thus be valuable for creating efficient monooxygenases for the preparation of essential enantiopure epoxides. Key points
Bioexpoxidation of both conjugated and unconjugated alkenes by HhMO with excellent enantioselectivities.
Gating residue 199 played an essential role in controlling the enantioselectivity of SMO.
HhMO E199L catalyzed the epoxidation of styrenes with up to > 99% ee.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 3
·1-8
·
IF 6.408
Jin Yuting,Yan Rongfang,Wang Shuo,Wang Xianghong,Zhang Xuemei,Tang Yiwei
A novel fluorescence platform was fabricated for enrofloxacin determination by using cDNA-modified dipeptide fluorescence nanoparticles (FDNP-cDNA) and aptamer-modified magnetic Fe 3 O 4 nanoparticles (Fe 3 O 4 -Apt). The FDNP were prepared via tryptophan-phenylalanine self-assembling. When magnetic Fe 3 O 4 -Apt incubated with standard solution or sample extracts, the target enrofloxacin was selectively captured by the aptamer on the surface of the Fe 3 O 4 nanoparticles. After removing interference by washing with phosphate-buffered saline, the FDNP-cDNA was added, which can bind to the aptamer on the surface of the Fe 3 O 4 nanoparticles not occupied by the analyte. The higher the concentration of the target enrofloxacin in the standard or sample solution is, the less the FDNP-cDNA can be bound with the Fe 3 O 4 nanoparticles, and the more the FDNP-cDNA can be observed in the supernatant. Fluorescence intensity (E x /E m = 310/380 nm) increased linearly in the enrofloxacin concentration range 0.70 to 10.0 ng/mL with a detection limit of 0.26 ng/mL (S/N = 3). Good recoveries (88.17–99.30%) were obtained in spiked lake water, chicken, and eel samples with relative standard deviation of 2.7–6.2% ( n = 3). Graphical abstract
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 3
·1-9
·
IF 6.408
Gao Huanli,Xu Tingting,Zhou Jiahuan,Rojas Orlando J.,He Ming,Ji Xingxiang,Dai Hongqi
A system for the rapid and ultra-sensitive detection of Staphylococcus aureus ( S. aureus ), a prevalent foodborne pathogen is introduced. Limitations of typical electrochemical sensing, often subjected to interference from non-specific protein adsorption are addressed. A dual-aptamer-based sandwich immunobiosensor is shown for its benefits regarding specificity and anti-fouling capacity, endowed by a sulfonated polyaniline layer combined with signal amplification via highly conductive gold nanoparticles. EIS spectra (Nyquist plots) were recorded at pH 7.4 PBS containing 5 mM Fe(CN) 6 3− /Fe(CN) 6 4− , in order to verify the possibility of the electrochemical sensing for detection of S. aureus. Results demonstrated that the constructed immunobiosensor presents an extended detection range (1 × 10 1 to 1 × 10 5 CFU/mL) and detection limit as low as 2 CFU/mL. The resistance values of the immunobiosensor developed maintain at a stable value during 2 weeks. Besides, the specificity of the system is highlighted by testing raw milk, and the results of which demonstrate the excellent prospects of the system for monitoring foodborne pathogens. Graphical abstract
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Journal of Coatings Technology and Research
·
2022
·Vol. 19
·期 3
·947-957
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IF 2.339
Liu Xueting,Fan Ying,Li Yuan,Liu Wenkui,Wu Jingjing,Liu Changming,Yang Bin,Pang Zhicheng
This paper mainly studies an inorganic coating based on geopolymer technology. Metakaolin is used as raw material, and water glass solution is used as alkali activator to prepare geopolymer. The surface properties including crack resistance and scrub resistance of the obtained coating were improved by adding certain amount of resin and fillers such as silicone acrylic emulsion, mica powder, and MgO powder. The results show that when the contents of silicone acrylic emulsion, mica powder, and MgO powder are 19.00%, 3.20%, and 2.16–2.86%, respectively, the surface properties of the coating are optimal. Especially noteworthy is that adding MgO can enhance the surface properties of the prepared coating, the mechanism of which can be rationalized by the inhibited shrinkage of the coating via microcrack deformation, the enhanced compactness and the filled pores of the coating upon adding MgO. In addition, the flame retardancy of the samples was explored through thermal analysis and cone calorimeter.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 20
·30337-30347
·
IF 5.19
Yang Shuyi,Zou Hongtao,Cheng Ying,Tao E.
Owing to containing high fraction of organic matter, the tannery sludge seemed to be fit for composting. Actually, it was intensively harmful to the environment, due to containing chromium (Cr). So it might undergo a long time of storage until finding a proper way to dispose it. In the storage period, it would expose the surrounding environment a risk via releasing Cr. In this study, an approach was proposed to minimize the amount of released Cr, and reveal the mechanism on immobilizing Cr. Collagen protein waste (CPW) was adopted to immobilize Cr, and it was evaluated via leaching experiment. The lowest leaching concentration of Cr was 12 mg/L, meeting the limits of related standard in China (GB 5085.3–2007, Tcr < 15 mg/L). Moreover, the compositions and functional groups of the optimum sample (12 mg/L) were also characterized, confirming that the dominant functional groups cross-linking with Cr were hydroxyl (-OH), carboxyl (-COOH), and epoxy (-COC). Importantly, density functional theory (DFT) calculation was also employed, suggesting that Cr was restrained by accepting electrons from O atoms donating by functional groups.
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CELLULOSE
·
2022
·Vol. 29
·期 2
·1003-1015
·
IF 6.123
Xiao Yuanxiang,Shen Guokang,Zheng Weishi,Fu Jiajia,Fu Feiya,Hu Xinyue,Jin Ziyi,Liu Xiangdong
We report here a simple and effective method applying a combination of chitosan (Cs) and Cu(II) ion to fabricate antibacterial cotton fabric with a remarkable durability against laundering. The antibacterial fabric was prepared by grafting Cs onto cotton fibers through a succinic acid linkage, following with loading Cu(II) ions by the coordination effect. The modified fabric achieved 100% bacterial reduction (BR) rates against both S. aureus and E. coli , and remarkable laundering durability was confirmed even after 100 washing cycles. Moreover, longer Cs chains grafted on fibers shown enhanced chelating capability with Cu(II) ions. When compared to copper nanoparticles, our strategy has advantages in terms of low dosage of Cu(II), reasonable cost, simple process, reduced environmental hazards, and improved antibacterial durability. This work is believed to be a practical strategy for developing environment-friendly and cost-effective long-acting antibacterial cotton textiles.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 6
·2251-2263
·
IF 4.478
Liu Rong,Gao Wenqing,Yang Jiaqian,Zhang Shun,Wang Chenlu,Lin Jing,Zhang Sijia,Yu Jiancheng,Tang Keqi
A novel hydrophilic porous biocomposite was fabricated by incorporating graphene oxide (GO) @chitosan (CS) foam substrate (GO@CS@ZIF-8 foam) with ZIF-8 crystals in situ via a facile stirring method for simultaneous enrichment of glycopeptides and phosphopeptides from complex biological samples. The experimental results demonstrated that GO@CS@ZIF-8 foam exhibited favorable specificity for simultaneous enrichment of N-glycopeptides and phosphopeptides under the same condition for HRP and β-casein tryptic digest mixtures. The novel material was further applied to enriching both glycopeptides and phosphopeptides simultaneously from 4 μL complex human serum, and 423 N-glycopeptides and 40 phosphopeptides corresponding to 133 glycoproteins and 29 phosphoproteins were identified, respectively. Graphical abstract
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危险品化学品经营许可证（带存储）