JOURNAL OF MOLECULAR LIQUIDS
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2017
·
IF 3.648
Ruirui Xie,Hongjun Zang,Hongying Ding,Bing Yan,Bowen Cheng
Efficient molybdenum- and tungsten-based catalysts have been reported for the oxidation of furoin and 5,5′-dihydroxymethyl furoin (DHMF) to furil and 5,5′-bihydroxymethyl furil (BHMF), respectively. The catalytic oxidation reactions were performed using oxygen in air as the accelerator in acetic acid solvent. Under the optimized reaction conditions and by using tetra-hexadecyltrimethyl ammonium octamolybdate ([CTAB] 4 Mo 8 O 26 ) as a catalyst, excellent conversions to furil (~ 100%) and BHMF (~ 94%) were observed in a shorter reaction time compared to the other catalysts. This oxidation reaction has been performed by using acetic acid as a solvent under air for the first time, and the catalysts can be readily recycled with no noticeable loss in their catalytic activity over five consecutive catalytic cycles. In this manner, the catalytic system developed in this work is a greener and more environmentally benign process for the oxidation of furoin and DHMF.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 33
·28023-28033
·
IF 3.289
Jinsong He,Jiangdong Dai,Tao Zhang,Jun Sun,Atian Xie,Sujun Tian,Yongsheng Yan,Pengwei Huo
Hierarchical carbon materials with ultrahigh specific surface area and high porosity were synthesized by KOH activation from sustainable α-cellulose and employed as adsorbents to study adsorption performance of tetracycline (TC) and sulfamethazine (SMZ) from aqueous solutions. The physical and chemical properties of the as-prepared materials were characterized by SEM, TEM, FT-IR, XPS, Raman and a surface area analyzer. The obtained porous carbon exhibited a hierarchical pore structure, large BET specific surface area (3187.91 m2 g−1) and pore volume (1.781 cm3 g−1) when the activation temperature reached 850 °C. The maximum adsorption capacities were 1072.86 and 786.18 mg g−1 for TC and SMZ removal at 298 K, respectively. Moreover, TC and SMZ showed similar adsorption features, kinetic results could fit well using a pseudo-second-order model, intraparticle diffusion was not the rate-controlling step and adsorption isotherm results fit well with the Langmuir model. The adsorption capacities increased with contact time and adsorption temperature and, moreover, pH and external ionic species have a significant effect on adsorption efficiency. Thermodynamic studies implied that physisorption might dominate adsorption and the adsorption process is spontaneous and thermodynamically favorable. The results are of importance to indicate that the as-prepared porous carbon could be used as a low-cost and effective adsorbent in pharmaceutical wastewater treatment.
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DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 32
·12745-12755
·
IF 4.177
Jun Liu,Wei Wu,Qingyong Tian,Zhigao Dai,Zhaohui Wu,Xiangheng Xiao,Changzhong Jiang
Coupling two different semiconductors to form composite photocatalysts is the most significant method for environmental remediation. In this regard, tube-like α-Fe2O3/Ag6Si2O7 heterostructures are synthesized via anchoring p-type Ag6Si2O7 nanoparticles (NPs) on the surface of n-type α-Fe2O3 short nanotubes (SNTs) by conventional wet-chemical routes. α-Fe2O3 SNTs are firstly fabricated by a hydrothermal method with the assistance of dihydrogen phosphate and sulphate. Then, Ag6Si2O7 NPs are anchored on α-Fe2O3 SNTs by an in situ deposition method, and the α-Fe2O3/Ag6Si2O7 p–n heterostructures are finally obtained. The morphologies, crystal structure, photocatalytic performance and photocurrent properties of as-synthesized α-Fe2O3/Ag6Si2O7 heterostructures are investigated. Six organic dyes are used for determining the high-efficiency Z-scheme photocatalytic activities of the as-obtained photocatalysts under ultraviolet and visible light (mercury lamp, 300 W). Compared with pure α-Fe2O3 SNTs, the photocurrent intensity of the α-Fe2O3/Ag6Si2O7 heterostructures is improved 62 times. The enhanced significant photocatalytic performance of α-Fe2O3/Ag6Si2O7 heterostructures could be attributed to charge transfer between Ag6Si2O7 NPs and the charge separation between Ag6Si2O7 NPs and α-Fe2O3 SNTs. These composite heterostructures are proposed to be an example for the preparation of other composite silicate photocatalysts for practical application in environmental remediation issues.
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PubMed
高影响因子
Drug Delivery and Translational Research
·
2017
·Vol. 8
·期 1
·83-96
·
IF 3.094
Pan Linmei,Zhou Jing,Ju Feng,Zhu Huaxu
Alpha-asarone is a bioactive component of Acorus tatarincuii Schott with low bioavailability, which is often used for treatments of various brain diseases in clinical setting. This study was to formulate biodegradable methoxy polyethylene glycol-polylactic acid (mPEG-PLA) nanoparticles (NPs) surface-modified by lactoferrin (Lf), for delivering α-asarone into the brain following intranasal administration. Alpha-asarone NPs were prepared by premix membrane emulsification. The relative parameters were optimized by a Box-Behnken experimental design. The particle size, zeta potential, and dispersibility index of NPs and Lf-NPs were characterized. Their ex vivo permeation, pharmacokinetics, distribution in the brain and other tissue, brain targeting, and toxicity were investigated. Following intranasal administration, Lf-NPs had a better permeability and no significant poor bioavailability compared to NPs; the area under curve from 0 to 12 h of α-asarone in Lf-NPs of the olfactory bulb, hippocampus, olfactory bundles, and thalamus were 2.14-, 4.17-, 3.62-, and 1.96-fold of those in NP group, respectively. Lactoferrin could enhance the efficacy of brain targeting with NPs and reduce its liver accumulation. Toxicity of NPs on nasal mucosal cilia and epithelial cells was also decreased by Lf. To summarize, these results demonstrate that Lf-NPs of α-asarone have potential as a carrier for nose-to-brain delivery of α-asarone for brain diseases.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2017
·
IF 3.671
Tao Feng,Ke Wang,Fangfang Liu,Ran Ye,Xiao Zhu,Haining Zhuang,Zhimin Xu
Naringin is a bioflavonoid that is rich in citrus plants and possesses enormous health benefits. However, the use of naringin as a nutraceutical is significantly limited by its low bioavailability. In this study, a novel water-soluble ternary nanoparticle material consisting of amylose , α-linoleic acid and β-lactoglobulin was developed to encapsulate naringin to improve its bioavailability. The physicochemical characteristics of the ternary nanoparticle-naringin inclusion complex were analysed by ultraviolet-visible spectroscopy (UV), Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), high-resolution transmission electron microscopy (TEM), X-ray diffractometry (XRD) and particle size distribution. The results confirmed the formation of the ternary nanoparticle-naringin inclusion complex. The encapsulation efficiency (EE) and loading content (LC) of the ternary nanoparticle-naringin inclusion complex were 78.73 ± 4.17% and 14.51 ± 3.43%, respectively. In addition, the results of the ternary nanoparticle-naringin inclusion complex in simulated gastric fluid (SGF) and simulated intestinal fluid (SIF) demonstrated that naringin can be gradually released from the complex. In conclusion, ternary nanoparticles are considered promising carriers to effectively improve the bioavailability of naringin.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2017
·
IF 3.671
Wei Liu,Cheng Hu,Yameng Liu,Shijie Dai,Weisheng Lu,Xing lv,Wenbing Yao,Xiangdong Gao
A carboxymethylated polysaccharide (CMSERP) was prepared from the residue of Sarcandra glabra (Thunb.) Nakai. CMSERP was mainly composed of galacturonic acid (GalA), glucose (Glc), galactose (Gal), glucuronic acid (GlcA), arabinose (Ara), rhamnose (Rha), xylose (Xyl), ribose (Rib), and fucose (Fuc) at the ratio of 29.79:19.30:11.92:6.32:4.68:3.95:3.39:2.31:1.00. The primary structure features of CMSERP were determined to be a pectin like polysaccharide according to FT-IR, NMR, and HPAEC-PAD. The results of HPSEC-MALLS-RID and DLS indicated the Mw, Mn, Mz, and S 2 Z 1/2 of CMSERP were 5.515 × 10 4 g/mol, 1.566 × 10 4 g/mol, 1.510 × 10 6 g/mol, and 62.8 (±1.2%) nm, respectively. TEM and AFM revealed CMSERP was dispersed in 0.05 M sodium sulfate but aggregated in water. Moreover, a high α-glucosidase inhibition activity (83.38% ± 2.30% at 1000 μg/mL) of CMSERP which is higher than that of acarbose was observed. The results proved the effects of carboxymethylation on poor water-soluble polysaccharides and explore a potential α-glucosidase inhibitor which from abandoned extracted residue for the functional foods and pharmaceutical industries.
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2016
·
IF 0.62
Jian Sun,Tao Liu,Jianhua Xu
Alfa-hederin (Hed) is regarded as a promising drug in cancer therapy especially in drug-resistant cancers. However, its reduced anticancer activity caused by protein absorption limits its wide clinical applications. The purpose of this study was to develop diblock copolymer-based micelles as an integrated platform for targeted delivery of Hed to overcome its intrinsic drawbacks. Amphiphilic diblock copolymers, poly(epsilon-caprolactone)- b -poly(oligo(ethylene glycol) monomethyl ether methacrylate- co -RGD) (PCL- b -P(OEGMA- co -RGD)) consisting of hydrophobic PCL, hydrophilic POEGMA and targeting peptide (RGD) were fabricated via the combination of ring-opening polymerization (ROP), atom transfer radical polymerization (ATRP), and polymer post-functionalization. Hed-containing targeting micellar nanoparticles , Hed-NP-RGD, were obtained via the co-micellization of PCL- b -P(OEGMA- co -RGD) and Hed, showing hydrodynamic diameter 108 ± 1 nm and zeta potential −4.10 ± 0.15 mV. In vitro experiments demonstrated that Hed-NP-RGD possessed superior anti-proliferative and cellular apoptosis in comparison with that of free Hed possibly due to the assumption that the presence of polymeric micelles protected Hed molecules from absorption by proteins and tumor-targeting effect.
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JOURNAL OF FOOD BIOCHEMISTRY
·
2017
·Vol. 41
·期 6
·e12402
·
IF 1
Xing Xie,Zong-Cai Tu,Lu Zhang,Yi Zhao,Hui Wang,Zhen-Xing Wang,Nan-Hai Zhang,Bi-Zhen Zhong
This study assessed the phytochemical composition, antioxidant activities, and α-glucosidase inhibition of Anoectochilus roxburghii formula tea (ARFT) residue by comparing with that of ARFT infusion and ARFT extract. ARFT residue extract showed the maximum total phenolics, total flavonoids, and total condensed tannins content, with the values of 146.70 GAE mg/g E, 58.50 QE mg/g E, and 312.08 mg CE/g E, respectively, while ARFT infusion exhibited the lowest values. The strongest ABTS + · scavenging ability and α - glucosidase inhibition were also found in ARFT residue extract, but the best DPPH· scavenging ability was observed on the 95% ethanol extract of ARFT. Totally, 29 compounds were tentatively identified from the ARFT residue extract by using HPLC-QTOF-MS/MS, including 2 organic acids, 17 flavonoids, 4 fatty acids, 5 saponins, and 1 sugar. The results indicated that ARFT residue can be a promising source of natural antioxidants and α - glucosidase inhibitors. Practical applications Anoectochilus roxburghii formula tea (ARFT) is a popular health-promoting tea in China, but research on the bio-activities and functional constitution of ARFT and its residues is not available. This study suggested promising antioxidant and α - glucosidase inhibition of ARFT residue and revealed the presence of 29 major phytochemical compounds, which indicated that ARFT residue can be a potential resource of natural antioxidants and α - glucosidase inhibitors in food, cosmetic, and pharmaceutical industry.
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INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 2.6
Hongye Li,Yi Yue,Yiming Jiang,Yi Wu,Mengqing Zhang,Xinan Zeng,Wei Zhao
Summary This study focuses on encapsulation of sugarcane polyphenols (SPs) to assess its impact on their bioaccessibility and efficacy in inhibiting starch digestion, thereby contributing to glycaemic control strategies. The hypothesis posits that encapsulation enhances both the bioaccessibility and functional effectiveness of SPs. Carboxymethyl cellulose (CMC) and carrageenan (CAR) were employed as encapsulating agents. The methodology included an evaluation of α-amylase inhibitory activity and the bioaccessibility of SPs across various encapsulation formulations in vitro digestion, highlighting a specific formulation that combines 0.5% CMC and 0.5% CAR to encapsulate 0.4% SPs. Findings reveal that this formulation significantly increases SPs' bioaccessibility and exhibits the highest α-amylase inhibitory activity, suggesting its potential to support a low glycaemic index (GI) diet (GI = 54.7). It was observed that the GI is significantly inversely correlated with the bioaccessibility of total polyphenols and proanthocyanidins in SPs, while the bioaccessibility of total flavonoids in SPs showed no significant effect on pGI. Interestingly, SPs encapsulated with CMC were less effective in inhibiting starch digestibility than unencapsulated SPs, attributed to the tight binding of CMC with polyphenols, which limits their interaction with starch and α-amylase. The study highlights the crucial influence of encapsulation materials on polyphenol functionality and emphasises the need for strategic encapsulation in modulating glycaemic responses. These findings advance the understanding of how processing technologies can optimise the health benefits of dietary bioactives, guiding future research towards functional applications and dietary interventions for glycaemic control.
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Foods
·
2024
·Vol. 13
·期 7
·1070
·
IF 4.7
Jin Liu,Li Ma,Senwen Deng,Xinzhi Chen,Qi Li,Aiqing Xu,Ting Tong,Shuhua Tan,Mingkang Wang,Jiangtao Cai,Haihua Wang
During the production process of refined betel nuts in China, a large amount of processing by-product, betel nut waste seeds, is generated. Betel nut waste seeds are rich in bioactive elements, but they have not been effectively utilized yet. In this study, an ultrasonic-assisted deep eutectic solvent method (DES) was used to selectively extract α-glucosidase inhibitors from waste seeds. Compared with traditional extraction solvents such as water and ethanol, the extraction efficiency of specific DESs is higher, and the content of alkaloids in the extracts is lower. However, it should be noted that some pure DESs exhibit inhibitory activity towards α-glucosidase. DESs, based on choline chloride/urea, were selected due to the high extraction efficiency of α-glucosidase inhibitors and their low alkaloid content as well as low inhibitory activity. The optimal extraction conditions were determined using single-factor experiments as follows: 30% (v/v) water content, a choline chloride/urea ratio of 5:3, a solid–liquid ratio of 1:10, extraction temperature of 40 °C, and a duration of 30 min. Through recovery experiments, it was found that the DES can be reused four times under these conditions, maintaining an inhibition rate comparable to alcohol extraction methods. The IC50value of the extract was measured at 0.0066 mg/mL, superior to acarbose. In summary, this research has successfully developed an efficient and selective method for extracting α-glucosidase inhibitors from betel nut waste seeds, thereby presenting a promising avenue for future applications.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xuemei Wei,Xiankui Cheng,Xinyu Zhang,Guodong Sheng,Huiting Xu
The utilization of biocompatible and inexpensive adsorbents for the effective scavenging of U(VI) and Eu(III) from wastewater is still an open challenge in nuclear waste management. Herein, three kinds of α-Fe 2 O 3 nanocrystals with different morphologies, i.e., α-Fe 2 O 3 nanospheres (HNSs), nanoplates (HNPs) and nanorods (HNRs), which were exposed (1 0 2), (0 0 1), and (1 1 0) facet, respectively, was used to scavenge U(VI) and Eu(III) from aqueous solutions via an adsorption procedure. Various techniques of N 2 adsorption–desorption, FT-IR, XRD, XPS, TEM, SEM and EDS were applied to characterize these adsorbents before or after adsorption. The results indicated that the adsorption capacity of U(VI) and Eu(III) was in the order of HNPs (0 0 1) > HNRs (1 1 0) > HNSs (1 0 2), namely, α-Fe 2 O 3 nanoplates was proved to be a good adsorbents, with removal capacity of 221 mg/g and 131 mg/g for U(VI) and Eu(III) scavenged on HNPs, respectively. The kinetics of U(VI) and Eu(III) scavenging agreed with the pseudo second order kinetic model, suggesting that chemical interaction is mainly responsible for U(VI) and Eu(III) scavenging on these materials. Furthermore, the Freundlich model fit the best for adsorption isotherms of U(VI) and Eu(III). The present study demonstrated that these α-Fe 2 O 3 nanocrystals are promising materials in nuclear waste management.
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Nanoscale
·
2025
·
IF 5.1
Jiasheng Wang,Tianyu Zhang,Jiliang Song,Fengxin Zhang,Hong Liu,Wan-Hui Wang,Ming Bao
Unsaturated alcohols (UOLs) are important fine chemical intermediates. Thus, it is of great significance to design and prepare catalysts for highly selective hydrogenation of CO of α,β-unsaturated aldehydes (UALs). In this paper, a fluffy mesoporous Al2O3-supported Ag–In2O3 catalyst (Ag-In2O3/f-m-Al2O3) was synthesized by employing a two-solvent method, in which Ag and In2O3 form a Mott–Schottky junction and lead to electron transfer from In2O3 to Ag. Electron-rich Ag repels the CC bond owing to “four-electron repulsion”, and electron-deficient In2O3 acts as the electrophilic site to adsorb the O atom of the CO bond, thus improving the selectivity towards UOLs. In addition to a larger specific surface area and smaller mass transfer resistance, the fluffy mesopore Al2O3 exhibits a large number of Lewis acid sites, which can further improve UOL selectivity. With the help of Ag–In2O3/f-m-Al2O3, high UOL selectivity can be obtained from UALs containing aliphatic, aromatic and heterocyclic groups. This elaborate design of the catalyst could contribute to the highly selective hydrogenation of UALs to UOLs.
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危险品化学品经营许可证（带存储）