GREEN CHEMISTRY
·
2023
·Vol. 25
·期 23
·10091-10100
·
IF 9.8
Mo Zhang,Zheng Li,Yeqin Feng,Xing Xin,Guo-Yu Yang,Hongjin Lv
Selective hydrogenolysis of abundant C–O bonds of β-O-4 linkages in natural lignin or lignin models has been considered as a key strategy for the generation of value-added organic chemicals. Herein, we report a mild, efficient, and selective photocatalytic strategy for hydrogenolytic cleavage of lignin β-O-4 models by using Ni-containing polyoxometalate (POM) catalysts and CdS quantum dots. Upon blue LED light irradiation, the present photocatalytic system can effectively transform various lignin β-O-4 models to the corresponding hydrogenolysis products (phenols and ketones) with >95% conversion and >93% product selectivity. A tentative photocatalytic mechanism is proposed based on various experimental and spectroscopic analyses. The facile strategy presented in our work could be extended to the photocatalytic preparation of various value-added chemicals from natural biomass or other biomass derivatives in the near future.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2023
·
IF 3.9
Huimin Bi,Jianqiu Yang,Houwei Jiang,Fangyu Fan
Rosa roxburghii Tratt seed oil (RSO) and β-carotene (βC) were chosen to prepare proliposomes by the thin-film dispersion method. The characteristics of unloaded proliposome, RSO proliposome (L-R), βC proliposome (L-β), and RSO/βC proliposome (L-R-β) were analyzed, and their antioxidant activity, storage stability, and release properties were investigated. The proliposomes had an encapsulation efficiency (RSO, βC) higher than 83.10%, nanometer size, smooth surface, and irregular structure. L-R-β showed better dispersibility, stability, and antioxidant activity than L-R and L-β. Simultaneous encapsulation of RSO and βC reduced the phospholipid oxidation of proliposomes and improved the retention rate of RSO in storage environments of 4, 25, and 40°C. Moreover, the RSO and βC release kinetics of proliposomes in the simulated saliva fluid and gastric fluid phases can be described by the first-order model, and the Korsmeyr–Peppas method was applied to describe their release mechanism in the simulated intestinal fluid phase.
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Xiaoxi Yang,Dongxue Zhao,Shaohui Ge,Pengsha Bian,Hongmei Xue,Yumiao Lang
A sodium alginate (SA) edible coating containing oregano essential oil (OEO)/β-cyclodextrin (β-CD) inclusion complexes (SA/OEO-MP coating) was developed to extend the shelf life of fresh chicken breast during refrigeration storage. First, OEO was inserted into the hydrophobic interior of β-CD to form an inclusion complex (OEO-MP) that maintained its excellent antioxidant and antibacterial activities . The formed OEO-MP was characterized using fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). In addition, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) results demonstrated that β-CD could improve the thermal stability of OEO. The encapsulation efficiency reached 71.6 %, and OEO was released continuously from the OEO-MP. The lipid oxidation , total viable count (TVC) and sensory properties of chicken breasts were regularly monitored when OEO-MP was incorporated into the SA coating for chicken breast preservation. Compared with the uncoated group, the SA/OEO-MP-coated groups showed significantly reduced increases in pH, thiobarbituric acid reactive substances (TBARS), total volatile base nitrogen (TVB-N), and TVC, especially in the SA/OEO-MP1 group. In summary, the SA/OEO-MP coating could preserve the chicken breast by reducing lipid oxidation and inhibiting the proliferation of microorganisms. It would be developed as a prospective edible packaging for chicken preservation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Mingyao Xu,Yin Chen,Yunjie Fei,Fenglan Lv,Xiaohui Xiong,Yuanjian Liu
A bipolar electrode electrochemiluminescence (BPE-ECL) with β-cyclodextrin (β-CD) host–guest recognition was constructed for the rapid detection of Salmonella typhimurium ( S. typhimurium). Firstly, the sulfhydryl β-CD (SH-β-CD, with inner diameter size: 6.0–6.5 Å) was assembled on the gold-plated cathode of BPE. Ferrocene (Fc, length: 3.5 Å; width: 4.4 Å) labelled signal probe and parts Fc-aptamer complement each other to form a double-stranded DNA (dsDNA). Due to its large size, the dsDNA with a double Fc (width > 8.8 Å) could not be embedded into the cavities of β-CD. In the presence of S. typhimurium, Fc-aptamer bond specifically to S. typhimurium, and the signal probe was shed from the dsDNA. Then, the signal probe (guest) was captured by the SH-β-CD (host) on the surface of the BPE. Due to the principle of spatial matching between Fc and SH-β-CD, a stable inclusion complex could be formed, which made Fc close to the cathode surface of the BPE. When a certain driving voltage was applied, Fc was oxidized to Fc + . The cathode surface of Fc + would promote electron transfer, causing the [Ru(bpy) 3 ] 2+ at the anode emit light, and effectively convert the electrochemical signal into an ECL signal. 10 1 -10 5 CFU mL −1 S. typhimurium was positively correlated with Fc + and ECL intensity, with a detection limit of 10 1 CFU mL −1 . Therefore, S. typhimurium can be quantitatively detected by the electron transfer rate of the BPE.
✓ 已验证
产品关联
DOI
高影响因子
Food Quality and Safety
·
2023
·
IF 5.6
Li Yang,Wu Minyu,Zhai Liang,Zhang Hui,Shen Lirong
Camellia oil and olive oil with superior economic value are easily adulterated with other, cheaper oils. It is difficult to identify both oils by traditional methods because of their similar fatty acid profiles. In the present study, a novel method for qualitative and quantitative analysis of β-sitosterol using GC/MS and GC/FID was developed to identify camellia oil and olive oil. The method validation of β-sitosterol analysis showed good linearity and satisfactory values for recovery, accuracy, precision, and repeatability. The linear regression coefficient (R2) of the calibration curve was 0.9985. An acceptable limit of detection (0.36 mg/100 g) and limit of quantification (1.20 mg/100 g) were achieved. The spiked recoveries were 95.0% to 100.3%. The relative standard deviation (RSD) of within-day precision was less than 3.26%, and the RSD of retention times and peak areas for repeatability were within 0.03% and 1.08%, respectively. The contents of β-sitosterol in virgin camellia oil and virgin olive oil were in the range of 14.1–30.2 mg/100 g and 94.3–173.2 mg/100 g, respectively, indicating that the β-sitosterol content in the former is seven times that in the latter, and β-sitosterol could be a potential marker for the authentication and adulteration detection of both oils.
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Ye Li,Hongrui Liu,Chunyu Mu,Jiali Gu,Chun Li
Ethoxyquin (EQ) is a synthetic antioxidant that is derived from quinolines and found in many meat products. EQ is strictly regulated in feed due to its potential health implications. An investigation of the interaction mechanism between EQ and transporter protein before and after β-cyclodextrin (β-CD) encapsulation was conducted with the use of multi-spectroscopy, cyclic voltammetry, and molecular docking. EQ formed complexes with bovine serum albumin (BSA), and affected secondary structure and microenvironment polarity of BSA. However, at 298K, EQ's fluorescence quenching constants decreased from (9.81±0.05)×10 3 L mol -1 to (4.94±0.09)×10 3 L mol -1 , binding constants decreased from (10.28±0.02)×10 3 L mol -1 to (2.08±0.07)×10 3 L mol -1 , after encapsulation in β-CD as well as the binding distance increased. β-CD contains part of EQ in its hydrophobic cavity, inhibiting its binding to BSA. β-CD inclusion complex prevented adverse effects of EQ on BSA conformation. However, β-CD encapsulation had no effect on EQ's antioxidant activity.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Yuxi Qin,Adeel Ahmed,Shahid Iqbal,Muhammad Usman
In the current research study, β-cyclodextrin modified Fe 3 O 4 (β-CD@Fe 3 O 4 ) superparamagnetic composite materials were synthesized using co-precipitation and ultrasonication methods, with β-CD acting as a coating material. The as-prepared material was employed as a heterogeneous catalyst for the activation of peroxymonosulfate (PMS) for the removal of norfloxacin (NOR). The catalytic activities of bare Fe 3 O 4 , β-CD@Fe 3 O 4 composites, and the β-CD@Fe 3 O 4 /PMS system were compared under various parameters. Results revealed that the β-CD@Fe 3 O 4 /PMS exhibited higher catalytic activities, and a removal efficiency of 99.12% with a rate constant of 0.1576 min −1 was achieved in 30 min under optimum conditions ([catalyst] = 0.4 g/L, [PMS] = 4.0 mM, [NOR] = 30 mg/L, pH = 7.0). In particular, the larger surface area of β-CD@Fe 3 O 4 (120 m 2 g −1 ) and the presence of additional reactive sites accelerated the activation of PMS in comparison to bare Fe 3 O 4 (70 m 2 g −1 ) and thereby promoted the mineralization of NOR. The impact of various pivotal factors on NOR abatement was also studied. Scavenging results and the EPR technique revealed that the SO 4 •− , • OH, and O 2 •− radicals participated in the removal of NOR in the β-CD@Fe 3 O 4 /PMS system. The Fe 3+ /Fe 2+ /Fe 3+ redox cycle in β-CD@Fe 3 O 4 is used for the activation of PMS and generates radicles. The reusability results show excellent stability of the catalyst material, and a loss of 4.35% was observed after four cycles. The results revealed that the β-CD@Fe 3 O 4 composites can activate PMS and have potential for the degradation of various pollutants from the environment.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Binbin Tan,Jing Wang,Yao Deng,Huidi Zhang,Jiang Wang,Zhihao Zhang,Wenlei Wang
The key to enhancing the activation efficiency of peroxydisulfate (PDS) lies in facilitating the adsorption of PDS and accelerating the rate of electron transfer at the interface. In this work, the oxygen vacancy (Ovs) concentration of ultrathin Bi 4 Ti 3 O 12 (BTO) was controlled in situ by high-energy electron beam bombardment. BTO V -300 exhibited a significant activation effect on PDS. The degradation rate constant ( k obs ) for the removal of ciprofloxacin (CIP) was measured to be 0.2080 min −1 under visible light irradiation, which was 3.71 times greater than that of the original BTO. Density functional theory calculations uncovered the principal role of oxygen vacancies as active sites for PDS activation. Introducing OVs significantly boosted the adsorption energy of PDS on BTO and lengthened the O O bond of PDS. This study represents the potential mechanism behind the activation of PDS by BTO V and provides valuable insights for enhancing the photoactivation efficiency of PDS.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zelai Li,Maohong Fan,Ge Gao,Wufeng Jiang,Xiaoshan Li,Cong Luo,Liqi Zhang,Fan Wu
Electrochemically mediated amine regeneration (EMAR) for CO 2 capture is a promising substitute for traditional organic amine–based CO 2 capture by replacing the thermal process with electricity. To avoid problems such as oxidative degradation, toxicity, volatilization, and precipitation of organic amine absorbent, potassium β–alanine was suggested as an absorbent using EMAR process for the first time in this study. The CO 2 absorption performance under different copper loading and chemical reactions were studied, and cyclic voltammetry, electrochemical impedance spectroscopy, chronocoulometry and the Taffel extrapolation method were used to study the electrochemical characterization. Compared to the benchmark monoethanolamine (MEA) system, a smaller potential difference between oxidation and reduction peak was acquired in the potassium β–alanine system, of which the energy consumption was only 44.1% of the MEA system at the current of 100 A/m 2 . The cathode Faraday efficiency in the potassium β–alanine system was 101.9% higher than that in the MEA system at the current density of 25 A/m 2 . Furthermore, the result of scanning electron microscope of the electrode surface after desorption showed that potassium β–alanine absorbent improved the inhomogeneity of the electrode surface and was in favor of uniform current distribution. Overall, potassium β–alanine can be used as a more environmentally friendly absorbent in the EMAR system and has great potential to further reduce the actual energy consumption and improve the Faraday efficiency and cycling performance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 107
·期 5
·3209-3218
·
IF 3.9
Hongcheng Yang,Qian Liu,Zhan Wang,Yuandan Dong,Enzhu Li
Designing and fabricating antennas that exhibit low losses and are compact, lightweight, and highly radiation efficient are challenging in the wireless-communication field. In this study, we simulated and fabricated microstrip patch antennas using β-CaSiO 3 low-temperature co-fired ceramic (LTCC) as dielectric resonator substrate. Compact ceramics that show good microwave dielectric properties (a relative dielectric constant [ ε r ] of 6.57, high-quality factor [ Q × f ] of 35 086 GHz [@14.85 GHz], and temperature coefficient of frequency [ τ f ] of −33.56 ppm °C −1 for the optimal composition) were obtained when Li 2 O–CaO–B 2 O 3 –CuO glass was added to β-CaSiO 3 and sintered at 950°C. The high-frequency properties of these composite ceramics reveal that the dielectric constant and dielectric loss are stable in the 38−58 and 70−90 GHz ranges, respectively. Furthermore, a circularly polarized antenna fabricated using a CaSiO 3 -based ceramic shows a high radiation efficiency (92.04%) and gain (3.35 dBi) at a center frequency of 2.5 GHz. These β-CaSiO 3 composite ceramics offer promising prospects for high-frequency use as well as in mobile communication applications. This study provides insight for the development of innovative antennas with new LTCC materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Jiali Gu,Yanxuan Ma,Zimu Li,Hongrui Liu,Qionghua Zhang
Tert-butylhydroquinone (TBHQ) is a synthetic antioxidant found widely in foods such as cooking oil, fried baked goods and meat products, however, if consumed in excessive quantities, it may cause nutritional problems and chronic diseases. The binding of TBHQ to transport protein before and after β-cyclodextrin (β-CD) encapsulation was investigated by multiple spectroscopies and molecular docking technology. At 298 K, the binding constant, enthalpy, and entropy of bovine serum albumin (BSA) with TBHQ were (1.18 ± 1.50) × 10 4 M −1 , (−110.11 ± 15.29) kJ mol −1 and (−293.36 ± 50.87) J mol −1 K −1 at 298 K, respectively. By forming a stable complex with BSA through van der Waals forces and hydrogen bonds, TBHQ altered BSA's secondary structure and microenvironmental polarity. However, the binding affinity of TBHQ with BSA decreased after encapsulation by β-CD, but the binding distance increased. Because of the encapsulation of β-CD, the interference of TBHQ with the BSA conformation was also inhibited. Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscope study confirmed the formation of an inclusion complex between CD and TBHQ. According to UV spectroscopy, TBHQ and β-CD have a binding constant of (1.21 ± 0.03) × 10 3 M −1 . The formation of TBHQ–β-CD inclusion complex inhibited the binding of TBHQ and BSA, possibly because the inclusion of β-CD prevented TBHQ from entering the hydrophobic cavity of BSA, which prevented TBHQ from binding to BSA, alleviating the negative effects of TBHQ on BSA conformation. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging results showed that the antioxidant activity of TBHQ was not affected by β-CD encapsulation.
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Ningyue Liu,Siwei Zou,Conghua Xie,Yan Meng,Xiaojuan Xu
Colorectal cancer is the third most common cancer in the world, and therapies with safety are in great need. In this study, the β-glucan isolated from Lentinus edodes was successfully fractionated into three fractions with different weight-average molecular weight ( M w ) by ultrasonic degradation and used for the treatment of colorectal cancer. In our findings, the β-glucan was successfully degraded with the M w decreased from 2.56 × 10 6 Da to 1.41 × 10 6 Da, exhibiting the triple helix structure without conformation disruption. The in vitro results indicate that β-glucan fractions inhibited colon cancer cell proliferation , induced colon cancer cell apoptosis, and reduced inflammation. The in vivo results based on Azoxymethane (AOM)/dextran sulfate sodium (DSS) mouse model demonstrate that the lower-molecular weight β-glucan fraction showed stronger anti-inflammatory and anti-colon cancer activities by reconstructing intestinal mucosal barrier, increasing short chain fatty acids (SCFAs) content, regulating metabolism of gut microbiota , and rebuilding the gut microbiota structure with the increased Bacteroides and the decreased Proteobacteria at the phylum level, as well as with the decreased Helicobacter and the increased Muribaculum at the genus level. These findings provide scientific basis for using the β-glucan to regulate gut microbiota as an alternative strategy in the clinical treatment of colon cancer.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）