Journal of Functional Foods
·
2017
·
IF 3.144
Jin Feng,Chunfang Lin,Hua Wang,Songbai Liu
In this work, gemini dodecyl O -glucoside-based vesicles were successfully developed employing (+)-catechin (C) and (−)-epigallocatechin (EGC) laurate as model compounds. Results revealed that vesicles displayed high loading capacity for both C and EGC laurate and the incorporation of C or EGC laurate were confirmed by dynamic light scattering, transmission electron microscope, Fourier-transform infrared spectra, and differential scanning calorimetry analyses. C and EGC laurate stiffened the vesicle bilayer at low concentrations but created a remarkable increase in the membrane fluidity afterward. Vesicles readily underwent aggregation under thermal treatment and osmotic stress. The thermal stability of C and EGC laurate were significantly improved by vesicle encapsulation. Compared with C and EGC, encapsulated C and EGC laurate exhibited lower 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical-scavenging activity due to the shielding effect of vesicles but higher lipid-oxidation inhibitory ability because they preferentially concentrated in the liposome membrane.
研究领域:
药剂学
·
纳米技术
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Tingting Dai,Xuesong Li,Liying Wang,Xijia Yang,Yang Gao,Qixian Zhang,Wei Lü
Ni-Co-O material is the most representative polymetallic compound and has exhibited excellent energy storage properties. However, the high cost of composite restricts the practical application of Ni-Co-O material. In this paper, a simple and low-cost method is used to grow Ni-Co-O/C nanoarrays directly on a conductive matrix. The results show that the three-dimensional nanoflower-like Ni-Co-O/C composite has better electrochemical performance than that of the nanosheet Co-O/C binary composite. This microstructure provides a shorter path for electron transport, making the material high electron transport efficiency. The specific capacitance of Ni-Co-O/C/AC asymmetric supercapacitor can reach 128.75 mF cm −2 at 2 mA cm −2 . Under the condition of 20 mA cm −2 , after 4000 cycles of charge and discharge, the capacitance retention rate is maintained at 99.8 %. This 3D flower-like structure not only helps provide an open framework and rapid ion diffusion, but also exposes more active sites and enhances charge storage performance. Ni-Co-O/C calcined in nitrogen shows more abundant defect structure and larger specific surface area, which is further conducive to Ni-Co-O/C electrodes to expose more active sites and enhance the rapid diffusion and reaction of electrolyte ions .
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Changxiao Cao,Shaohua Gu,Zhaojie Song,Zehui Xie,Xuya Chang,Pingping Shen
Formation of water-in-oil (W/O) emulsion seriously limits heavy oil production, and the interfacial adsorption of heavy components of oil is the key to clarify the emulsification of crude oil and formation water. In this study, the viscosifying behavior of W/O emulsion was correlated with the interfacial adsorption of heavy components using two typical heavy oil samples, i.e., high-resins oil and high-asphaltenes oil. Results showed that the resins, instead of the asphaltenes , contributed to the pseudoplastic behavior of W/O emulsion. The interfacial adsorption of resins presented the lower interfacial tension (IFT), the higher interfacial viscosity and the stronger film stability. However, when more asphaltenes was adsorbed on the interface, the film of oil-water interface changed from viscous to brittle and breakable. According to the composition analysis, the interfacial activity of resins was much stronger than asphaltenes. Besides, the W/O emulsion formed using model oil with resins performed the better stability compared with that formed using model oil with asphaltenes. This study provided that the interfacial adsorption of resins enhanced the emulsifying ability of crude oil and the film stability of W/O emulsion, which heavily aggravated the viscosifying behavior.
研究领域:
石油工程
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Wenhui Wang,Zhen-quan Yang,Lixia Xiao,Jie Han,Tianzhu Guan,Xiaojuan Gong,Qin Hu
A paper-based assay for visualization of auramine O (AO) was for the first time established by using CFMs as a ratiometric fluorescent probe (RFP). The CFMs were melamine formaldehyde microspheres (MFMs) incorporated with carbon dots (CDs), where the CDs species as sensing units and MFMs as a signal amplification carrier. The proposed RFP can quantitatively measure AO content from 0.0 to 10.0 μM and exhibited an ultralow limit of detection (LOD, 15.7 nM). In particular, obvious luminescence color change of CFMs from blue to green was perceived with naked-eyes and therefore, a solution-based and a paper-based visualization platform were respectively proposed for on-site visual detection of AO with LODs of 1.15 μM and 0.83 μM, separately. Finally, those fluorescence methods were adopted in sensitively quantitative measurement of AO within various food and drug samples, providing new prospects for analysts and technical support in food quality monitoring.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 20
·9066-9072
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IF 3.591
Shaoguang Li,Huilin Liu,Xiaoying Zhang,Jiasong Cai,Kunlong Huang,Bing Chen,Liying Huang,Zhen Lin,Xinhua Lin,Hong Yao
A label-free, rapid, and highly sensitive colorimetric assay for the detection of glutathione (GSH) was developed. o-Phenylenediamine (OPD) can be selectively oxidized by Au3+ in phosphate buffer to produce light yellow 2,3-diaminophenazine. After the addition of GSH, the autocatalytic redox reaction between OPD and Au3+ can be effectively inhibited, resulting in a significant decrease in chroma and absorbance intensity. Reduced absorbance intensity can be used for the quantification of GSH. In addition, this method can achieve the discriminative detection of biothiols, such as cysteine and homocysteine. Based on these findings, a simple colorimetric assay was developed for the detection of GSH in the range of 1 nM to 1 mM with a low detection limit of 0.08 nM. More importantly, this procedure is simple, and the whole assay can be accomplished quickly within 15 min. Additionally, the proposed method was successfully used for the determination of GSH in biological fluids, such as serum samples.
研究领域:
分析化学
·
生物医学
✓ 已验证
DOI
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2024
·
IF 2.6
Cheng Li,Qinghui Chen,Jinqiao Rong,Houde He,Yu Lu,Yuxia Liu,Zhongfu Wang
As the main active glycoprotein of egg white, the biological functions of chicken ovomucin α- and β-subunit are closely related to the structure of glycans. However, the exact composition and structure of the subunit glycans are still unknown. We obtained highly pure chicken ovomucin α-subunit and β-subunit protein bands by the strategy combined with two-step isoelectric precipitation and SDS-PAGE gel electrophoresis. The ammonia-catalyzed one-pot procedure was then used to release and capture α-and β-subunit protein glycans with 1-phenyl- 3-Methyl-5-pyrazolone (PMP). The N / O -glycans of bis-PMP derivatives were purified and analyzed by LC-MS. More importantly, an effective dual modification was performed to accurately quantify neutral and sialylated O -glycans through methylamidation of sialic acid residues and simultaneously through carbonyl condensation reactions of reducing ends with PMP. We first showed that the α-subunit protein has only N -glycosylation modification, and the β-subunit only O -glycosylation, a total of 22 N -glycans and 20 O -glycans were identified in the α- and β-subunit, respectively. In addition, the complex N -glycan (47 %) and the sialylated O -glycan (77 %) are each major types of the above subunits. Such findings in this study provide a basis for studying the functional and biological activities of chicken ovomucin glycans.
研究领域:
生物化学
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糖生物学
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蛋白质组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yawei Shi,Yumei Xing,Keyan Liu,Yan Wang,Ya Sun,Zonglin Pan,Guanghui Ding
Dyes and oil substances are two common pollutants in wastewater, and it is highly expected to remove them simultaneously. In this study, MgFe 2 O 4 was synthesized by co-precipitation and then loaded onto polyvinylidene fluoride (PVDF) membrane to fabricate a MgFe 2 O 4 -PVDF composite membrane, which was successfully employed for concurrent dye degradation through peroxymonosulfate activation and separation of oil-in-water emulsions through one-step single-pass filtration. Under optimum conditions, both Rhodamine B (RhB) and hexane could be efficiently removed by 99.21 % and 99.89 % respectively. The effects of pH, inorganic ions and humic acid were studied, and the system showed wide applicability and good reusability. The reaction mechanism for RhB degradation was proposed based on quenching tests, open circuit potential test, galvanic oxidation process and X-ray photoelectron spectroscopy. The degradation pathway of RhB was proposed according to density function theory calculations for both RhB and its deprotonated counterpart deH-RhB as well as LC-MS analysis, and toxicity evaluation was also performed. The MgFe 2 O 4 -PVDF/PMS system may offer a possible solution for the efficient remediation of complex wastewaters.
研究领域:
环境工程
·
材料科学
·
化学工程
·
催化
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Xiao Zhou,Xian-Yong Wei,Yu-Miao Ma,Zhi-Min Zong
An active bifunctional nickel-based catalyst was prepared by decomposing Ni(CO) 4 to dispersive metallic Ni on Hβ zeolite and successfully applied in the catalytic hydroconversion (CHC) of an alkali lignin (AL). Detailed elemental composition, functional groups, and molecular compositions of the soluble portions (SPs) from non-catalytic hydroconversion (SP NCHC ) and CHC (SP CHC ) were characterized with an elemental analyzer, a Fourier transform infrared spectrometer, and a gas chromatograph/mass spectrometer (GC/MS). As a result, alkoxalkanes, phenol, cresol, veratrols, alkyl-substituted 1,4-dimethoxyphenols, 2,5-dimethylfuran, 3-hydroxyneopentanal, 4-methylpent-3-en-2-one, 4-methoxy-4-methylpentan-2-one, 1-(2,4-dihydroxy-3-tolyl)propan-1-one, and 2,5-dimethylhex-4-enoic acid only appear in SP CHC , and yields of multiple alkyl-substituted phenols, p -alkylanisoles, diols, non-substituted and alkyl-substituted methoxyphenols, and substituted phenylethanones in SP CHC are significantly higher than those in SP NCHC . The mechanism for catalytically hydrocracking >CH-O- bridged bonds over Ni/Hβ is proposed using benzyloxybenzene (BOB) and phenethoxybenzene as AL-related model compounds. Ni/Hβ proved to be stable after 3 cycles with relatively small loss in catalytic activity for catalyzing the hydrocracking of >CH-O- bonds in BOB.
研究领域:
化学工程
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材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Mengyang Xu,Bingqing Chang,Jinze Li,Huiqin Wang,Pengwei Huo
The assembly of different Metal organic framework (MOFs) into hybrid heterostructures has proven to be a promising strategy that can effectively break through the limited regulatory capacity of single metal sites. Here, an S-scheme heterostructure (Fe 3 Ni-MOF) based on homologous ligands (1,4-phthalic acid) of ultra-thin Ni-MOF and Fe-MOF nanoparticles with directional electron transport channels, was developed and used it for photoreduction of CO 2 . Under the S-scheme electric field mechanism, the photogenerated carrier can achieve efficient directional separation through Fe–O–Ni atomic bond, which significantly reduces the energy barrier of the rate-determining step. Results show that the performance of Fe 3 Ni-MOF (63.5 μmol g –1 ) was 20 and 3.2 times higher than that of Ni-MOF and Fe-MOF, respectively, and exhibits excellent CO selectivity (96.4%) and stability. Transmission electron microscopy and atomic force microscopy revealed the two-molecular-layers structure of Ni-MOF and the micro-assembly structure of Fe 3 Ni-MOF, which can shorten the electron transport distance and increase the molecular mass transfer rate. X-ray photoelectron spectroscopy, electron spin resonance and electron density difference calculations reveal that interfacial electric fields and atomic bonds work together to promote directional carrier separation, resulting in the accumulation of holes on Ni-MOF and electrons on Fe-MOF. The Gibbs free energy calculation and in-situ Fourier transformed infrared spectroscopy validate that the micro-assembled S-scheme heterostructures with directional electron transport channels can significantly reduce the activation energy barrier of the reaction. This study not only proves the feasibility of constructing MOFs S-scheme heterostructures using homologous ligands, but also provides a new way to overcome the limitations of monometallic MOFs. This strategy is expected to open up a new avenue to design efficient photocatalysts.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shuaiqi Zhao,Peng Wu,Jiajin Lin,Yifei Li,Anqi Li,Xiaojing Jin,Yu Chen,Bote Zhao,Yun Zhao,Guangxu Chen,Yongcai Qiu,Daiqi Ye,Shihe Yang
The development of low-temperature and water-resistant heterogeneous catalysts without noble metals is vital in the effective treatment of atmospheric pollutants in practical application. Herein, we report that Cu(I)-O-Co interfaces of ultrafine CuO x on Co 3 O 4 prepared by co-precipitation exhibit promising low-temperature activity and good water resistance. Experiment results together with density functional theory (DFT) calculations not only verify that Cu + species are stabilized over Cu(I)-O-Co interfaces because of the strong interaction between Cu 2 O 1 and Co 3 O 4 , but also demonstrate that the Cu(I)-O-Co interface facilitates oxygen species activation for promoting catalytic oxidation and reduces the accumulation of hydroxyl and bicarbonate species on the surface of CuO x /Co 3 O 4 . DFT calculations also reveal that the CO oxidation rate-limiting step via the dissociation pathway under dry conditions is the Co-OO-Cu species dissociation while the CO coupling with the adsorbed O 2 becomes the rate determining step for CO oxidation through the direct pathway over Cu(I)-O-Co interface under humid conditions. Further, the CuO x /Co 3 O 4 catalyst also exhibits superior and stable catalytic activity for toluene oxidation, comparable with partial supported noble metal catalysts (T 90 = 190 °C). The present work gives a useful strategy for the rational design of low-temperature and water-resistant non-precious-based catalysts to be applicable in CO and toluene removal in practical applications.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2023
·
IF 3.6
Benqiang Cui,Ye Tian,Yongchao Gao,Shaoyi Hua,Yanhui Shi,Changsheng Cao
Direct introduction of silyl radicals to forge C–Si bonds is of central importance in organic synthesis, owing to the formidable potential of silyl groups as coupling partners for further derivatization reactions to achieve more valuable compounds. Cleavage of heteroaromatic endocyclic carbon–heteroatom bonds to assemble C–Si bonds is scarce. Here, we demonstrate a dearomatization silylation of benzofurans and furopyridines via silyl radical addition and C(2)–O bond scission under metal-catalyst-free and mild conditions. Preliminary mechanistic experiments suggest that these transformations involve radical/single-electron transfer and [1,5]-Brook rearrangement processes. This protocol for the total synthesis of Doxepin and oxyresveratrol derivatives is carried out. The silylated products in several transformation reactions have proven to be useful as synthetic intermediates.
研究领域:
有机化学
·
药物化学
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Genetics
·
2025
·
IF 2.8
Minglu Zhang,Jianbo He,Rao Fu,Guojian Bao,Yijun Lu,Zechuan Zhang,Jiawu Yan,Jialu Ding,Fei Yang,Beicheng Sun
Introduction: Small nucleolar RNA (snoRNA) mediates RNA modifications, including 2′-O-methylation (Nm) and pseudouridine (Ψ), which has been proven to impact tumor progression. However, the role of snoRNA in the epigenetics of tumors remains poorly understood due to the lack of sufficiently effective experimental methods to identify snoRNA targets. Here, we identified SNORD13H, a C/D box snoRNA, as being downregulated in hepatocellular carcinoma (HCC), and its low expression was associated with HCC development.Methods: To elucidate specific roles of SNORD13H in HCC, we used a comprehensive array of methodologies, including flow cytometry, xenograft mouse model, reverse transcription at low dNTP concentration followed by PCR (RTL-P) assay, and surface sensing of translation (SUnSET) assay.Results: In this study, we first demonstrated that reduced SNORD13H serves as a biomarker for HCC, facilitating cellular proliferation. SNORD13H mediates 2′-O-methylations of 18S rRNA and RAS mRNA, thereby enhancing translation efficiency and regulating RAS protein levels in HCC. The diminution of SNORD13H activates the RAS pathway, contributing to the progression of HCC.Discussion: Our study establishes SNORD13H as a dual-function regulator in HCC progression. Furthermore, our findings indicate that SNORD13H is detectable in plasma, highlighting its potential utility in tumor screening.
研究领域:
分子生物学
·
癌症研究
·
遗传学
·
表观遗传学
·
RNA修饰
✓ 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）