ANALYTICAL BIOCHEMISTRY
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2024
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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
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DOI
PubMed
高影响因子
ACS Omega
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2022
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IF 4.132
Prince Kumar Singh,Jagreeti Singh,Tapas Medhi,Aditya Kumar
Diabetes is a group of metabolic disorders characterized by elevated blood sugar levels, leading to many undesirable health consequences. There are many herbal formulations, traditionally used by the Northeast Indian population for disease management. These formulations require scientific validations to optimize their efficacy and increase their popularity. In this study, we attempt to scientifically validate a polyherbal formulation traditionally used for the management of diabetes through preliminary phytochemicals investigation, characterization of potential phytochemicals using Fourier transform infrared (FT-IR) spectroscopy, high-resolution liquid chromatography mass spectrometry (HR-LC/MS) analysis, and in silico characterization of physiochemical, drug-likeness, and pharmacokinetic properties of identified phytochemical compounds. Qualitative phytochemical screening of various extracts of the formulation confirmed the presence of alkaloids, phenols and tannins, flavonoids, fats, and oils. Phytochemical quantification of the various extracts showed that the highest total phenolic content is present in the ethanolic extract (35.61 ± 0.15 mg GAE/g), while the highest total flavonoid content is present in the chloroform extract (76.33 ± 2.96 mg QE/g) of the formulation. FT-IR spectroscopic analysis revealed various characteristic band values with various functional groups in the formulation extract such as amines, alcohol, fluoro compounds, phenol, alkane, alkene, and conjugated acid groups. HR-LC/MS analyses identified nearly 51 compounds including 9 small peptides and 42 potential phytochemical compounds. In silico SwissADME analysis of identified compounds revealed 25 potential compounds following Lipinski’s rule and showing drug-like characteristics, and out of them, 16 compounds exhibited good oral bioavailability, as revealed in the bioavailability radar. The overall study showed that the presented polyherbal formulation is enriched with bio-active phytochemical compounds with good pharmaceutical values.
研究领域:
药理学
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植物化学
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生物信息学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Renchan Han,Xiangyu Wang,Min Jiang,Iseult Lynch,Jun Ma,Ping Ning
The sintering aggregation of carbon material (ZIF-N-C-600), as well as the tendency towards agglomeration and oxidation of zero-valent iron nanoparticles (Fe 0 ) limit their applications in advanced oxidation processes. Hence, a flower-like Fe 0 @ZIF-N-C-600 was rationally constructed by facile one-step self-assembly to ameliorate peroxydisulfate (PDS) activation. The polyhedral ZIF-N-C-600 aggregates were exfoliated into thinner porous nanosheets and Fe 0 nanoparticles were effectively dispersed and anchored onto ZIF-N-C-600. 96.7 % of metronidazole (MNZ) was eliminated by the Fe 0 @ZIF-N-C-600/PDS system, and the removal reaction rate constant k values were 2 and 2.55 times as high as Fe 0 @ZIF/PDS and Fe 0 /PDS, respectively. Fe 0 , defective sites, C=O and pyridinic N were identified as the active sites promoting PDS activation to produce ·OH, SO 4 · - , ·O 2 – and 1 O 2 for synergistic oxidative elimination of MNZ. The formation rate of ·OH was calculated to be 4.62 times higher than that of the SO 4 · - by multivariate nonlinear fitting, and the ·OH contributes up to 63.5 %. Fe 0 @ZIF-N-C-600/PDS system possesses excellent tolerance and selectivity to complicated water bodies, and the effective continuous degradation was achieved in a self-made catalytic reactor. Moreover, DFT calculations and LC-MS analysis were applied to deduce possible pathways for MNZ degradation. This work offers an effective strategy to regulate the morphology of sintered carbon materials and improve the application of metal nanoparticles in advanced oxidation processes.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2025
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IF 5.7
Ying Li,Huaping Xiong,Wei Shi,Zheming Ni,Shengjie Xia
Defect engineering and heterostructure construction are important strategies to enhance the photocatalytic performance of single-phase materials. In this study, an O- and Cd-dual-defect-modified LaOCl@CdS heterojunction (Ov-L@Cdv-C) was successfully constructed. Under visible light irradiation, using the typical fluoroquinolone antibiotic ciprofloxacin (CIP) as the target pollutant, Ov-L@Cdv-C exhibited superior photocatalytic degradation performance compared to Ov-LaOCl and Ov-L@CdS. Under optimal conditions (0.5 g/L catalyst, 0.010 g/L initial CIP concentration, pH = 5), the degradation efficiency of CIP reached 84.79 % within 150 min, significantly higher than that of Ov-LaOCl (48.73 %) and Ov-L@CdS (71.96 %). XPS and EPR characterizations confirmed the presence of abundant O and Cd dual defects in the Ov-L@Cdv-C heterojunction. ESR and free radical quenching experiments revealed that the main reactive species during the degradation process were ·O 2 − and h⁺. Based on work function calculations and built-in electric field analysis, a Z-scheme photocatalytic mechanism for the Ov-L@Cdv-C dual-defect heterojunction was proposed. Furthermore, LC-MS analysis identified the degradation intermediates and proposed three possible degradation pathways. In addition, T.E.S.T. predictions indicated that the toxicity of CIP gradually decreased during the photocatalytic degradation process.
研究领域:
环境科学
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催化
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材料科学
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化学工程
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光化学
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分析化学
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毒理学
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2023
·Vol. 49
·期 10
·4257-4274
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IF 3.3
Cao Wenbo,Ren Haitao,Cai Chaochen,Li Dashuai,Li Tingting,Lou Chingwen,Lin Jiahorng
Photocatalysis is a promising technology for wastewater treatment. It is a key problem to develop photocatalytic materials that can efficiently remove tetracycline (TC) under weak light intensity. This article synthesized the UiO-66-NH 2 /Bi 2.15 WO 6 heterojunction using a solvothermal method, and its specific surface area increases by 2.1 times relative to Bi 2.15 WO 6 , endowing good adsorption capacity for TC. Compared with Bi 2.15 WO 6 , the heterojunction effectively improves the separation of electrons and holes and enhances the photocatalytic performance. Under weak light intensity (4 mW cm −2 ), the removal percentage of 50 mg L −1 TC can reach 78.0%, attributing to a synergistic effect between adsorption and photocatalysis. The free radical capture experiment showed that TC was photodegradation mainly under the action of hole (h + ) and superoxide radical (·O 2 − ). Finally, through LC/MS analysis, it is inferred that TC is degraded into H 2 O and CO 2 after a series of reactions such as deamination, dehydroxylation, amide bond breaking and ring opening. This study provides insights for the synthesis of more powerful photocatalysts for TC removal.
研究领域:
环境科学
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材料科学
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化学工程
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水处理
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DOI
高影响因子
危险品化学品经营许可证（带存储）