COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Haifeng Wang,Zhengsong Hu,Jie Xu,Chaoyang Li,Aokun Lin,Kunkun Zhu,Li Yu,Guanxiang Ma,Yuwen Liu,Haifeng Bao
Capturing gas bubbles in liquid is vital for the gas-liquid-solid (GLS) three-phase reactions due to the limited gas solubility. Constructing the special porous skeleton for bubble accommodation opens an opportunity to drag bubbles in liquid. Herein, mm-sized Pd-anchored cellulose/agarose (PCA) spheres with a highly porous architecture have been fabricated using a liquid nitrogen-freezing method. PCA particles could act as gas carrier to accommodate a variety of gas bubbles in liquid, including H 2 , O 2 , air, and CO 2 via an in-situ nucleation route. Moreover, these PCA beads enabled efficient multiphase catalysis as demonstrated by cascade reduction of a series of substances, such as aldehydes, nitroarenes, and alkenes. Their catalytic activities remarkably surpassed Pd-deposited solid glass spheres (PG) and sole Pd nanoparticles, manifesting the important role of their porous texture in gas harvesting and storage. A gas (H 2 ) utilization of 98.0 % was attained for multiphase reaction over PCA beads. During multiphase reaction process, a controllable motion of PCA spheres was achieved via gas reservation or consumption. This work provides a profound inspiration for bubble arresting and stabilization toward regulable movement and multiphase processes.
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产品关联
DOI
高影响因子
Food Additives & Contaminants Part B-Surveillance
·
2024
·
IF 2.5
Ping Wang,Gexiang Zhang
This study conducted a dietary exposure assessment of chloropropanols and aluminium, after quantifying their content in food. The mean dietary exposure to Al from total grain products was found to be 6.4E–04 mg/kg bw/week, not exceeding the provisional tolerable weekly intake (PTWI). The results showed that the mean dietary exposure of 3-monochloro-1,2-propanediol (3-MCPD) from grain products was higher than the tolerable daily intake (TDI). Deterministic evaluations showed that the mean HQ of 1.5 to Al from fried dough twist was higher than 1. However, the HI values to Al were lower than 1 and the Monte Carlo simulation (MCS) showed that the HQ was greater than 1 at the 99% exposure level. Deterministic and probabilistic methods indicated that HQ values of 3-MCPD from grain products were above 1, whereas the mean HI value was 0.62.
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DOI
高影响因子
BIOCONJUGATE CHEMISTRY
·
2024
·
IF 4
Hai-Yan Wen,Yusi Hu,You-Yang Duo,Liang Zhao,Zhi-Gang Wang,Shu-Lin Liu
Membrane tension is an important physical parameter of describing cellular homeostasis, and it is widely used in the study of cellular processes involving membrane deformation and reorganization, such as cell migration, cell spreading, and cell division. Despite the importance of membrane tension, direct measurement remains difficult. In this work, we developed a ratiometric fluorescent probe sensitive to membrane tension by adjusting the carbon chain structure based on polarity-sensitive fluorophores. The probe is sensitive to changes in membrane tension after cells were subjected to physical or chemical stimuli, such as osmotic shock, lipid peroxidation, and mechanical stress. When the polarity of the plasma membrane increases (the green/red ratio decreases) and the membrane tension increases, the relative magnitude of the membrane tension can be quantitatively calculated by fluorescence ratio imaging. Thus, the probe proved to be an efficient and sensitive membrane tension probe.
研究领域:
细胞生物学
·
生物物理学
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Xu Tang,Boxin Zhou,Zhen Su,Rongrong Wu,Xuchun Qiu,Lei Liu
Hypochlorite (ClO − ) is recognized as a bioactive substance that plays a crucial role in various physiological and pathological processes. The increase of ClO − content in cells is a key factor in the early atherosclerosis lesions, which are closely linked to cardiovascular and cerebrovascular diseases. Therefore, the development of an efficient and sensitive method for detecting hypochlorite in tap water, serum, and living cells, including animal model in vivo is of paramount importance. In this study, a novel fluorescent probe (Cy-F) based on the cyanine group was designed for the specific detection of ClO − , demonstrating exceptional selectivity, high sensitivity, and rapid response. The probe successfully detected ClO − in tap water and serum with a limit of detection (LOD) of 2.93 × 10 −7 M, showcasing excellent anti-interference capabilities. Notably, the probe exhibited good biocompatibility, low biological toxicity, and proved effective for detecting and analyzing ClO − in live cells and zebrafish. This newly developed probe offers a promising approach and valuable tool for detecting ClO − with biosafety considerations, paving the way for the design of functional probes tailored for future biomedical applications.
研究领域:
生物化学
·
医学
·
分析化学
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DOI
PubMed
高影响因子
Communications Chemistry
·
2021
·Vol. 4
·期 1
·1-12
·
IF 6.581
Ge Xuan,Hu Qiaodan,Yang Fan,Xu Jun,Han Yanfeng,Lai Pingsheng,Qin Jingyu,Li Jianguo
The crystallization processes of titanates are central to the fabrication of optical and electrical crystals and glasses, but their rich polymorphism is not fully understood. Here, we show when and how polymorphic selection occurs during the crystallization of barium titanate (BaTiO 3 , BT) using in situ high energy synchrotron X-ray diffraction and ab initio molecular dynamic simulation. An anomalous structure transition is found in molten BT during cooling across the cubic-hexagonal transition temperature, which enables nucleation selection of BT by manipulating the undercooling: a cubic phase is preferred if nucleation is triggered at large undercooling, whereas a hexagonal phase is promoted at small undercooling. We further reveal that the nucleation selection between the cubic and the hexagonal phase is regulated by the intrinsic structure property of the melt, in particular, the degree of polymerization between Ti-O polyhedra. These findings provide an innovative perspective to link the polymorphic crystallization to the non-isomorphic structure transition of the melt beyond the conventional cognition of structural heredity.
研究领域:
材料科学
·
凝聚态物理
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DOI
高影响因子
ARCHAEOMETRY
·
2016
·
IF 1.364
Y. Zheng,H. Zhang,B.-J. Zhang,L.-H. Yue
Tabia was a very popular construction material with high mechanical strength, great tenacity and good impermeability, which was widely used in ancient China. It is one of the greatest inventions of ancient China. Organic additives, such as sticky rice, egg white and sugar, were believed to be added to some tabia, according to many ancient documents. However, the detection of these organic additives is not easy, because the soil and pigments in tabia can interfere with the analytical observations. In this paper, a simple and economical method to detect sticky rice composition in tabia is presented. Starch, the main component of sticky rice, can be extracted by acetic acid aqueous solution, using a microporous membrane filter and an ultrafiltration method to get rid of the interference of soil particles and pigment, and finally it can be detected by an iodine–starch chromogenic reaction. A number of ancient Chinese tabia samples were analysed using this method and starch was found, which proved that sticky rice was added during the preparation process of tabia.
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DOI
高影响因子
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
·
2020
·Vol. 10
·期 10
·1562-1567
·
IF 2.831
Yuan Hui,Guo Jixi,Jia Dianzeng,Guo Mingxi,Liu Lang,Wu Dongling,Li Feng
A novel photochromic compound, 1,3-diphenyl-4-(3-chloro-4-fluorobenzal)-5-hydoxypyrazole 4-phenylsemicarbazide ( 1a ), has been synthesized by introducing a phenylsemicarbazide unit. The material exhibits good fatigue resistance and reversible fluorescent switching properties with distinct fluorescence on/off ratio under alternating UV irradiation and heating at 120 °C. For the fabrication of actual application materials, 1a /hydroxypropylmethylcellulose (HPMC) composite film has been successfully fabricated using hydrogel casting method. The 1a /HPMC composite film obtained can also show reversible photochromic reaction under UV irradiation and rapid thermal bleaching properties by heating. The HPMC composite film shows similar good photochromic properties as those of 1 in the crystalline state.
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DOI
高影响因子
ACS Catalysis
·
2019
·
IF 12.221
Tian-yuan Chen,Chenxi Cao,Tian-bao Chen,Xiaoxu Ding,Hai Huang,Liang Shen,Xinyu Cao,Minghui Zhu,Jing Xu,Jian Gao,Yi-Fan Han
We present a comprehensive mechanistic study on the highly tunable selectivity over Inx/ZrO2 catalysts in CO2 hydrogenation. By variation of the indium loading between 0.1 and 5 wt %, either an admirable selectivity to methanol of 70–80% or up to 80% selectivity to CO could be obtained in the temperature range of 250–280 °C. It is shown that the shift in the product spectrum is related to the synergy between indium species and the zirconia substrate through variable interfacial structures. Zirconia-modulated crystalline In2O3, which prevails for indium loadings between 2.5 and 5 wt %, could enhance stepwise hydrogenation of *HCOO, leading to *H3CO and finally methanol due to the suitable bonding strengths of *HCOO and *H3CO. Regarding CO, evidence has been provided that the synergistic effect between adjacent indium and zirconia sites is indispensable for the entire catalytic cycle. *HCOO is formed at the indium–zirconia interfaces and decomposes to CO subsequently. Highly dispersed InOx dominating for loadings below 0.5 wt % features an enormous indium–zirconia interface and suppresses hydrogenation ability for *HCOO, thus favoring the generation of CO. The study provides fundamental insights into the mechanism of CO2 conversion and reaction pathway tuning over oxide catalytic systems.
研究领域:
催化化学
·
材料化学
·
可持续能源
·
化学反应工程
·
表面科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xinqi Huang,Yaru Gong,Yuqi Liu,Wei Dou,Song Li,Qinxuan Xia,Deshang Xiang,Di Li,Pan Ying,Guodong Tang
Here, we combined Cd and In codoping with a simple hydrothermal synthesis method to prepare SnSe powders composed of nanorod-like flowers. After spark plasma sintering, its internal grains inherited well the morphological features of the precursor, and the multiscale microstructure included nanorod-shaped grains, high-density dislocations, and stacking faults, as well as abundant nanoprecipitates, resulting in an ultralow thermal conductivity of 0.15 W m–1 K–1 for the synthesized material. At the same time, Cd and In synergistically regulated the electrical conductivity and Seebeck coefficient of SnSe, leading to an enhanced power factor. Among them, Sn0.94Cd0.03In0.03Se achieved a peak ZT of 1.50 parallel to the pressing direction, representing an 87.5% improvement compared with pure SnSe. Notably, the material possesses isotropic ZT values parallel and perpendicular to the pressing direction, overcoming the characteristic anisotropy in thermal performance observed in previous polycrystalline SnSe-based materials. Our results provide a new strategy for optimizing the performance of thermoelectric materials through structural engineering.
研究领域:
材料科学
·
热电学
·
纳米材料
·
固体物理
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DOI
高影响因子
JSFA Reports
·
2024
·
IF 0
Rui-Yan Peng,Meng-Yao Hu,Hai-Xia Xu,Wen-Jun Wang,Zhong-Ping Yin,Ji-Guang Chen,Qing-Feng Zhang
Background Obesity is increasing seriously worldwide. Inhibiting pancreatic lipase (PL) is an important way to prevent obesity. Baicalein, a dietary flavone, shows various physiological activities and has anti-obesity potential. Therefore, the inhibitory activity of baicalein on PL was investigated in present study. Results Baicalein exhibited a significant inhibitory effect on PL with IC 50 value of 68 μg/mL. Inhibition kinetics indicated that baicalein was a mixed-type inhibitor of PL. Fluorescence titration showed that baicalein could induce fluorescence quenching of PL. The binding constant (logK a ) and number of binding sites were calculated as 5.40 and 1.11, respectively. In addition, synchronous fluorescence analysis revealed that the quenching ratio of baicalein to tryptophan was greater than that of tyrosine. Circular dichroism (CD) spectrum showed that the binding of baicalein affected the secondary structure of the enzyme protein. Through molecular docking analysis, it confirmed that baicalein could interact with amino acid residues in lipase, thus reducing the enzyme catalytic activity. In vivo studies showed that oral administration of baicalein with a does of 50 mg/kg bwt significantly reduced fat absorption and increased its fecal excretion in rats. Conclusion Baicalein showed inhibitory activity on PL in both in vitro and in vivo studies. It may be a safe and effective dietary supplement for obesity prevention.
研究领域:
生物化学
·
药理学
·
营养学
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DOI
Smart Medicine
·
2024
·Vol. 3
·期 1
·e20230047
·
IF 0
Chen Zheng,Xuan Wu,Ming Liu,Yulong Lan,Qian Liu,Erya Cai,Zhiyong Liao,Jianliang Shen
Bacterial infection can impede the healing of chronic wounds, particularly diabetic wounds. The high-sugar environment of diabetic wounds creates a favorable condition for bacterial growth, posing a challenge to wound healing. In clinical treatment, the irregular shape of the wound and the poor mechanical properties of traditional gel adjuvants make them susceptible to mechanical shear and compression, leading to morphological changes and fractures, and difficult to adapt to irregular wounds. Traditional gel adjuvants are prepared in advance, while in situ gel is formed at the site of administration after drug delivery in a liquid state, which can better fit the shape of the wound. Therefore, this study developed an in situ HA/GCA/Fe 2+ -GOx gel using a photothermal-enhanced Fenton reaction to promote the generation of hydroxyl radicals (·OH). The generation of ·OH has an antibacterial effect while promoting the formation of the gel, achieving a dual effect. The addition of double-bonded adamantane (Ada) interacts with the host-guest effect of graphene oxide and the double-bond polymerization of HAMA gel, making the entire gel system more complete. At the same time, the storage modulus (G′) of the gel increased from 130 to 330 Pa, enhancing the mechanical properties of the gel. This enables the gel to have better injectability and self-healing effects. The addition of GOx can consume glucose at the wound site, providing a good microenvironment for the repair of diabetic wounds. The gel has good biocompatibility and in a diabetic rat wound model infected with S . aureus , it can effectively kill bacteria at the wound site and promote wound repair. Meanwhile, the inflammation of wounds treated with HA/GCA/Fe 2+ -GOx + NIR was lighter compared to untreated wounds. Therefore, this study provides a promising strategy for treating bacterial-infected diabetic wounds.
研究领域:
生物材料
·
伤口修复
·
抗菌治疗
·
糖尿病并发症
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DOI
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2013
·
IF 2.596
Guoting Cui,Wuxia Zhang,Amin Zhang,Haibo Mu,Hongjin Bai,Jinyou Duan,Cuiyun Wu
The Fructus Jujubae has been widely used as favorable food and folk medicine in China and Russia. In this study, we compared the carbohydrate constituents and antioxidative effects of Fructus Jujubae polysaccharides from five different production areas in South Xinjiang. Results demonstrated that the average annual temperature ( r = 0.590) and frost-free period ( r = 0.779) were well correlated to the uronic acid content, while the neutral carbohydrate content showed negative correlation with precipitation amount ( r = −0.567). Antioxidative tests indicated that Fructus Jujubae polysaccharides could scavenge chemicals-induced reactive oxygen species in a dose-dependent manner. In addition, these polysaccharides could rescue H 2 O 2 -induced HUVEC death. The antioxidative activity of polysaccharides from the Fructus Jujubae might contribute to their diverse medicinal and nutritional values.
研究领域:
食品科学
·
植物化学
·
药理学
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DOI
高影响因子
危险品化学品经营许可证（带存储）