INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Zhong Shi,Zhuangzhuang Shi,Mengmeng Wu,Yaqi Shen,Guoqiang Li,Ting Ma
Food-grade emulsion gels have attracted increasing attention in food and drug manufacturing, owing to their potential as novel delivery systems for lipophilic bioactive ingredients. Emulsion gels are structurally either a polymeric gel matrix with incorporated emulsion droplets (emulsion-filled gels), or a network of aggregated emulsion droplets (emulsion particulate gels). In this study, a novel emulsion gel was prepared by formulating an oil-in-water (O/W) emulsion stabilized by sanxan alone, followed by heating and cooling treatment, resulting in a structured solid system. Stable O/W type sanxan emulsion gels (SEGs) were obtained at sanxan concentration >0.5% ( w /w). Fluorescence microscopy results confirmed the adsorption of sanxan on oil droplet surfaces. The effect of temperature and sanxan/oil concentrations on the rheological and textural properties of the SEGs was evaluated: the SEG containing 1% (w/w) sanxan and 20% (w/w) sunflower oil exhibited excellent rheological and textural properties. Further, the addition of 10 mM Na + or 5 mM Ca 2+ greatly enhanced the thermostability of the SEG. The potential of SEGs as sustained-release delivery systems for β-carotene was also explored. The findings are of great interest for the development of novel delivery systems based on emulsion gels stabilized by sanxan for the sustained release of lipophilic components.
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DOI
高影响因子
LUMINESCENCE
·
2019
·Vol. 35
·期 2
·222-230
·
IF 1.691
Bo Kong,Tong Yang,Peng Hou,Chun Hong Li,Hong Yan Zou,Cheng Zhi Huang
Energy transfer engineering based on fluorescent probes for directly sensing enzyme activities are in great demand as enzyme-mediated transformations, which are central to all biological processes. Here, a fluorescence carbon dot (CD)-based assay exhibiting selective responses to the quantitation of β-glucosidase and the effect of its inhibitor was developed. The most common substrate, para-nitrophenyl-β- d -glucopyranoside (pNPG) was hydrolyzed by β-glucosidase to release p -nitrophenol (pNP), which can efficiently quench fluorescence of CDs via an inner filter effect and electron transfer. However, in the presence of inhibitors of β-glucosidase, the fluorescence intensity gradually recovered as the concentration of inhibitors increased. Therefore, the enzyme-triggered fluorescence turn-off/turn-on of specific CDs successfully achieved sensitive detection of β-glucosidase and monitored the effect of its inhibitors. This new strategy was applied to detect β-glucosidase and monitor β-glucosidase inhibitor in hepatoma cells using cell imaging. All results suggest that the new method is sensitive and promising for use in cancer diagnosis and treatment.
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 103
·84410-84422
·
IF 3.84
Hai-Min Shen,Gong-Yuan Zhu,Wu-Bin Yu,Hong-Ke Wu,Hong-Bing Ji,Hong-Xin Shi,Yi-Fan Zheng,Yuan-Bin She
Renewable β-cyclodextrin (β-CD) was immobilized onto the surface of hybrid silica using ethylenediamine as linking groups to construct an adsorbent in water treatment (CD@Si), and the obtained CD@Si was characterized through FT-IR, XPS, EDX, contact angle measurement, TGA, solid-state 13C NMR, SEM, and XRD analyses. The effect of initial pH, contact time on the adsorption performance of CD@Si for p-nitrophenol, and the adsorption kinetics, adsorption isotherms, adsorption thermodynamics, reusability and adsorption mechanism were investigated systematically, which indicate that the adsorption of p-nitrophenol onto CD@Si is a very fast process. The adsorption equilibrium can be reached in 15 s with an acceptable equilibrium adsorption capacity of 69.6 mg g−1 at pH 7.0, which is much faster than many reported adsorbents based on β-CD. The adsorption of p-nitrophenol onto CD@Si follows the pseudo-second-order model, obeys the Freundlich model, and is a feasible, spontaneous, and exothermic process which is more favorable at lower temperatures. And the formation of an inclusion complex and a hydrogen bond interaction are two origins of p-nitrophenol being adsorbed onto CD@Si. Additionally, CD@Si can be recycled and reused for at least five runs with an acceptable adsorption capacity, and is a very promising adsorbent for the fast adsorption of p-nitrophenol or its analogues from the aqueous phase. Additionally, this work also provides a strategy to increase the adsorption rate of adsorbents based on β-CD.
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高影响因子
Nanoscale
·
2024
·Vol. 16
·期 17
·8661-8671
·
IF 5.8
Mingxing Li,Xiaoge Wang,Xiaofan Cao,Zhiqun He,Chunjun Liang,Jing Ju,Fangtian You
NaYF4 systems have been widely studied as up-conversion host matrices, and their phase transitions are flexible and worth investigating in great detail. Herein, the evolution of morphology and crystal structure of a Eu3+-doped β-NaYF4 single nanoparticle heated in an air atmosphere was investigated using in situ transmission electron microscopy (TEM). The annealing process revealed that the hexagonal β-NaYF4 phase undergoes sequential transformations into high-temperature cubic phases at both 350 °C and 500 °C. The emission characteristics of Eu3+ in the single nanoparticle after heating treatment were also analyzed using Correlative Cathodoluminescence Electron Microscopy (CCLEM). The results of CCLEM suggest a gradual decrease followed by a subsequent increase in structural symmetry. A comprehensive spectroscopic and structural analysis encapsulates the entire transformation process as NaYF4 → YOF → Y2O3. In situ energy dispersive spectroscopy analyses (EDS) support this reaction process. The aforementioned technique yields correlative lattice-resolved TEM images and nanoscale spectroscopic information, which can be employed to assess the structure–function relationships on the nanoscale.
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高影响因子
MICROCHEMICAL JOURNAL
·
2017
·
IF 3.034
Agustín G. Crevillén,Mercedes de Frutos,José Carlos Diez-Masa
Isotachophoresis (ITP) coupled to zone electrophoresis (ZE), either free zone electrophoresis (FZE) or gel electrophoresis (GE), carried out mainly in capillaries and, although less frequently, also in microchips, is a powerful preconcentration and separation technique which has been successfully used for the study of many low molecular-weight analytes. However, this analytical technique has been scarcely applied for proteins separation. In this work, an on-chip transient ITP coupled to free zone electrophoresis (t-ITP-MFZE) mode with LIF detection is developed for the preconcentration and separation of the proteins α-lactalbumin and β-lactoglobulin. Firstly, for LIF detection, the proteins were off-chip fluorescently labeled with the fluorogenic reagent Chromeo P503. Then, several separation parameters in t-ITP-MFZE mode such as leading electrolyte, terminating electrolyte, separation voltage, and injection time were optimized to achieve the maximum sensitivity while maintaining an adequate resolution between α-lactalbumin and β-lactoglobulin in a single column configuration t-ITP. Using the optimized electrolytes (50 mM imidazole/HCl pH = 8 as leading electrolyte and 100 mM imidazole/12 mM HEPES pH = 8 as terminating electrolyte) separation of both proteins was achieved in less than 4 min with peak resolution of 1.5. The LODs were 55 nM and 380 nM, for α-lactalbumin and β-lactoglobulin, respectively, which are adequate for some food allergenicity studies. Finally, comparison of the optimized t-ITP-MFZE method to the equivalent MFZE method, carried out also in microchips but without the isotachophoretic preconcentration step, provided preconcentration indexes for both proteins around 10.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Yakun Li,Pinhua Rao,Jincheng Wang,Shiqiang Song,Runkai Wang,Shihui Liu,Lei Che
All kinds of soil conditioners have been used to improve soil quality. The application of many traditional soil conditioners was limited by single performance. In this study, a novel multifunctional microspheric soil conditioner was prepared based on Arabic gum , gelatin, chitosan and β-cyclodextrin. Arabic gum and gelatin (AG-GL) microspheric carriers, which could load ferrous sulfate (FS), were synthesized via complex coagulation method. The AG-GL(FS) microspheres were covered by chitosan quaternary ammonium salt (CQAS) through single coagulation method. And β-cyclodextrin (β-CD) was used as the outermost shell to improve chemical stability of the soil conditioner by saturated solution method. Finally, the novel multifunctional microspheric soil conditioner AG-GL/CQAS/β-CD-FS was obtained and characterized by Fourier transform infrared spectroscopy , thermogravimetric analyzer, polarizing microscope, scanning electron microscope and particle size analyzer. The novel soil conditioner shows good nutrient slowly-releasing, water retention, heavy metal ions adsorption and antibacterial performances with the particle size of 14–17 μm and high thermal decomposition temperature, which has the potential application in improving soil quality.
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高影响因子
Laser & Photonics Reviews
·
2021
·Vol. 15
·期 11
·2100317
·
IF 13.138
Xiangming Yue,Ju Xu,Hang Lin,Shisheng Lin,Renfu Li,Bo Wang,Qiugui Huang,Pengfei Wang,Ping Sui,Yao Cheng,Yuansheng Wang
The green-emissive laser phosphor is urgently demanded for projection displays to compensate the “Green Gap.” Herein, the well-known β-SiAlON:Eu 2+ with admirable luminescent feature is incorporated into robust silicate glass matrix, cosintered on sapphire plate, and then constructed into “phosphor wheel,” succeeding in retaining excellent green-emissive performance and meanwhile relieving the luminescence droop at high pumping density of blue laser. Probing the local effect of laser–matter interaction reveals that the luminescence saturation is majorly determined by thermal quenching, but the influence of intensity quenching cannot be ignored. Systematical works are performed to optimize glass composition, cosintering procedure, sample parameters, and optical path, turning out the maximal quantum efficiency of 60%, thermal conductivity of 9.5 W m −1 K −1 , and high saturation threshold far beyond 22 W mm −2 . In a proof-of-concept experiment, accompanied with red laser diode, the constructed light engine yields a high brightness with luminous flux of 1310 lm (luminance of 880 Mcd m −2 ), a low étendue of ≈1.5 mm 2 , and a wide color gamut of 112.5% National Television System Committee (NTSC), demonstrating the composite material as an efficient laser-driven color converter for projection displays.
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高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2019
·Vol. 37
·期 7
·664-673
·
IF 2.804
Liu Ya-Di,Zhang Qiang,Yu Xin-Hong,Liu Jian-Gang,Han Yan-Chun
For poly(9,9-dioctylfuorene) (PFO), β phase (coplanar conformation with the intra-chain torsion angle of 165°) has a greater conjugation length and higher degree of order compared to those of α phase, which favors charge carrier transport. However, the highest content of β phase obtained so far is 45%. We propose to increase the content of β phase by promoting the solution aggregation of PFO molecules and extending film-forming time. For this purpose, 1,8-diiodooctane (DIO) is added to PFO o -xylene solution, which enhances the interaction of PFO chains and improves the planarity of PFO backbone, resulting in the formation of ordered aggregation. The aggregates act as nucleation centers to promote the formation of β phase. The content of β phase increases with increasing DIO concentration and reaches a platform of 39% as DIO is more than 4 vol%. Furthermore, the film is kept in a sealed environment with o -xylene atmosphere for 3 h, thus the PFO molecules have enough time to diffuse to the crystallization front and achieve disorder-order transition. As a result, the crystallinity of PFO is improved significantly and the content of β phase increases to 52%, reaching the highest value reported so far.
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高影响因子
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2025
·
IF 2.9
Liu Zaizhi,Liao Haibin,Li Hualan,Zou Zhengrong
Cinnamomum camphora chvar. Borneol essential oil (CBEO), a potential antibacterial ingredient, faces challenges in widespread use for food preservation due to its high volatility and low stability. This study aimed to enhance the stability and release properties of CBEO by preparing CBEO/β-cyclodextrin microcapsules. The ultrasound-assisted complexation (UACP) method has been developed to fabricate microcapsules containing CBEO , with β -cyclodextrin used as the wall material. The UACP process was optimized using the Box–Behnken response surface methodology. Under optimal conditions—a wall–core ratio of 4.09, ultrasound time of 52 min, ultrasound power of 617 W, and embedding temperature of 32 °C—the maximum microcapsule yield (84.93 ± 2.21%) and encapsulation efficiency (60.20 ± 1.56%) were achieved. Analysis through scanning electron microscopy, Fourier transform infrared spectroscopy, particle size distribution analysis, thermogravimetric analysis, and X-ray diffraction revealed the effective encapsulation of CBEO by UACP method. Furthermore, CBEO microcapsules exhibited favorable thermal stability and a slow-release effect. This study presents a promising approach to microencapsulation technology for the preparation of plant essential oil microcapsules.
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高影响因子
Bioactive Carbohydrates and Dietary Fibre
·
2025
·
IF 3.6
Lan Zhao,Xinran Yang,Peijie Ye,Zhihai Lan,Jiale Cheng,Li Li,Jia Wu,Wei Xu,Huibin Chen
Qingke β-glucan (QBG), a gastrointestinal indigestible grain polysaccharide, is used as prebiotic and delivery carrier to mediate gut microbiota, while the mechanism of QBG of different MWs degraded by the gut microbiota remain uncertain. In this study, we investigated the impacts of QBG with different MWs on gut microbiota, SCFAs, and the degrading degree of polysaccharides in vitro fermentation. QBG groups significantly increased the total SCFAs, which is consistent with the results predicted by PICRUSt2 based on the KEGG pathway. The 27 functional genes associated with SCFAs metabolism were identified. Acetate and propionate synthesis was primarily mediated by the pta, ackA , and ACSS genes, whereas butyrate production mediated by the ptb, buk , and atoA genes. The low-MW QBG produced more SCFAs than the high-MW QBG after fermentation, suggesting that polysaccharide MW influences its biological functionality. These findings support polysaccharide-based gut microbiota-targeting drug and food development.
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高影响因子
FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Weiwei Hu,Junchao Gu,Kai Yang,Zhiguo Zhang,Daqun Liu,Weicheng Wu
Thermal processing is inevitable during highland barley (HB) production, but few studies pay attention to the component changes and their impact on HB properties. This study explored the different thermal effects of HB on the molecular, structural and physicochemical properties of β-glucan, as well as the related ultrastructural properties of kernels and the nutritional properties of HB flour (HBF). Microstructure images illustrated that thermal treatment dramatically disrupted endosperm cell walls, roughening their surfaces and almost gelatinised the starch granules of the HB kernel. The molecular weight and polydispersity index of β-glucan decreased from 253.10 ± 0.05 × 10 4 g/mol to 9.68 ± 0.03 × 10 4 g/mol and 13.64 ± 0.08 to 1.66 ± 0.04, respectively. X-ray diffraction and infrared spectroscopy demonstrated that thermal processing resulted in the breaking of polymer chains in β-glucan, but its main functional groups remained unchanged. Structural modifications in β-glucan led to reduced thermal stability and lower G′ and G″ values, indicating weaker gel structures. Heat treatment increased the peak viscosity of 100-5-HBF and 150-5-HBF, while reducing it in 150-50-HBF and 200-5-HBF due to the effects of starch gelatinisation and depolymerisation. Meanwhile, higher pasting viscosity and much slower starch digestion were apparent in the HBF than in the HBF-non β-glucan system. The results indicated the structural disruption of endosperm cell walls enhanced component interactions, which was also evidenced by varying β-glucan release rates during initial digestion (20 min). Thus, controlled thermal processing that minimally disrupts cellular structures or forms starch-encapsulating complexes may produce β-glucan-rich products with reduced starch digestibility.
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产品关联
DOI
高影响因子
PROCEEDINGS OF THE COMBUSTION INSTITUTE
·
2024
·
IF 5.3
Wen-luan Xie,Bin Hu,Xiao Yang,Ji Liu,Zhi-mo Fang,Kai Li,Yang-wen Wu,Bing Zhang,Qiang Lu
Phosphoric acid is an effective and widely used catalyst for biomass pyrolysis, with significant catalytic impact on the pyrolytic reactions and product distribution. However, its fundamental catalytic mechanism in lignin pyrolysis remains unclear. In this work, we proposed and investigated three possible H 3 PO 4 -assisted pyrolysis mechanisms, i.e., hydrogen-bond-induced decomposition, phosphoric-acid-assisted hydrogen transfer (H 3 PO 4 -AHT), and phosphorolysis, and carefully discussed them through theoretical calculations, electronic structure analyses, catalytic pyrolysis experiments using the β -O-4 linked lignin model. The results indicated that the H 3 PO 4 -AHT mechanism played a dominant role in lignin catalytic pyrolysis, superior to the other two mechanisms. The phosphoric acid molecule could take advantage of its unsaturated P = O and saturated P −OH groups for hydrogen donation and acceptance in concerted H 3 PO 4 -AHT reactions. Alternatively, it could also participate in concerted intermolecular hydrogen transfer with the active hydroxyl group as a mediator. The C β −O bond cleavage could be significantly enhanced by effectively reducing the tension of the transition state ring, leading to the generation of more phenol and styrene in pyrolysis experiments. Due to the inhibition of hydrogen abstraction, C α −C β breakage of β -O-4 linkage, side chain removal of primary products, etc., the formation of other products in phosphoric acid catalytic pyrolysis of β -O-4 linked lignin was restrained. This H 3 PO 4 -AHT catalytic mechanism was also confirmed to be conductive to tautomerism, elimination, dehydration, α -O-4 linkage fracture, β -1 linkage fracture, and other important decomposition reactions in lignin pyrolysis. The understanding of these mechanisms provides valuable insights into the role of phosphoric acid in lignin pyrolysis and may guide the development of effective biomass catalytic conversion methods.
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高影响因子
危险品化学品经营许可证（带存储）