MINERALS ENGINEERING
·
2022
·
IF 5.479
Lijia Zhu,Jie Liu,Yimin Zhu,Guichen Gong,Yuexin Han
As an essential raw material for the tin industry, cassiterite ore needs to be effectively separated and purified, and the removal of impurities such as fluorite becomes the key to cassiterite flotation. In this study, the flotation separation of cassiterite (SnO 2 ) and fluorite (CaF 2 ) was enhanced by using hydroxylcitric acid (HCA) as fluorite inhibitor and 2-carboxyphenyl phosphonic acid (CEPPA) as collector. With a reagent scheme of 120 mg/L CEPPA and 4.5 mg/L HCA at pH 10.0, the flotation recovery of cassiterite and fluorite was 92.80% and 13.57%, respectively. Under the same experimental conditions of artificially mixed mineral flotation, the flotation index of cassiterite concentrate grade 78.19% and recovery 90.29% was obtained. The selective adsorption mechanism of CEPPA and HCA on minerals was investigated by Zeta potential, Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The results showed that CEPPA anions had chemically adsorbed on cassiterite and fluorite, and the adsorption of HCA on fluorite surface was stronger than that on cassiterite surface. XPS analyses further confirmed that Ca sites exposed on fluorite had a stronger affinity for HCA than cassiterite. Furthermore, the addition of HCA had little effect on the adsorption of CEPPA on cassiterite, while the strong chemisorption of HCA on fluorite surface prevented the adsorption of CEPPA on fluorite. These results provide a theoretical basis and promising new strategy for the flotation separation of cassiterite and fluorite.
研究领域:
矿物加工工程
·
表面化学
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产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2022
·
IF 7.425
Yaodi Zhu,Weijia Liu,Shijie Liu,Miaoyun Li,Lijun Zhao,Lina Xu,Na Wang,Gaiming Zhao,Qiuying Yu
In this study, we developed a novel and sensitive AgNPs self-assembled solid-phase (AgNPs-SASP) SERS substrate platform using seed-mediated and liquid interface self-assembly methods and applied the platform for the detection of three bacterial spores. Multivariate statistical analysis (HCA and LDA) were employed for identification and categorization of the obtained data. The results illustrated that AgNPs-SASP exhibited high reproducibility and Raman enhancement effect (1.43 × 10 4 ). The Raman shift bands of the three bacterial spores ranged from 400 to 1800 cm −1 demonstrating the difference in reigon and intensity. And the intensities of their Ca 2+ -DPA Raman bands are significantly different. HCA results revealed that the spectra for the three bacterial spores were statistically different while LDA completely differentiated the spectra for the three bacterial spores with 100 % sensitivity and specificity. Overall, the novel SERS platform based on AgNPs-SASP provides an effective tool for food safety risk control and detection.
研究领域:
食品科学
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分析化学
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生物技术
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产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2016
·Vol. 9
·期 1
·141-148
·
IF 1.915
Li Jia-wei,Hou Chang-jun,Huo Dan-qun,Yang Mei,Zhang Su-yi,Ma Yi,Lin Yang
The components of Chinese liquor are influenced by geographical origins and raw materials. Currently, Chinese liquor identification systems are limited and have a single application that can distinguish only one nature of flavor type and production area. Four chemical reagents were successfully used to build this 3 × 1 simple colorimetric sensor array. This is the first time that a highly accurate colorimetric Chinese liquor sensor array was fabricated using only a few array points. It could distinguish four types of Chinese base liquors from Luzhou Laojiao, nine types of Chinese liquors with different flavor types, and seven types of Chinese liquors from different geographical origins. In order to ensure the accuracy, seven parallel samples were analyzed with water used as a control. PCA proved this sensor array to be effective. In LDA and HCA, every group was clearly classified. The “leave-one-out” cross-validation method was applied with 100% prediction ability in the three experiments. According to the results of the PCA, HCA, LDA, and the “leave-one-out” method, we can deduce that this colorimetric sensor array with multiple applications has great performance in discriminating Chinese liquors.
研究领域:
分析化学
·
食品科学
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产品关联
DOI
高影响因子
Food Bioscience
·
2024
·
IF 4.8
Yangyang Wang,Haolin Zhang,Lei Chen,Hui Teng,Hui Wang,Hui Cao
This study explored the inhibitory effect and mechanisms of four dihydroflavones (hesperetin, hesperidin, naringenin and naringin) addition on the production of five HCAs (IQ, DMIP, MeIQx, Norharman and PhIP) in roasted pork patties. Results indicated that the moisture holding capacity of dihydroflavones played a crucial role in their inhibition on HCA formation. The importance of moisture in the HCA formation was further confirmed by adding two water-retaining edible starches (corn and sweet potato starch). Significantly, the combination of edible starch and naringenin resulted in better inhibition of HCAs. The inhibition ratio of the mixture containing corn starch and naringenin on IQ, DMIP, MeIQx, Norharman and PhIP of pork patties were even up to 76.64%, 100%, 53.29%, 91.29% and 100%, respectively. This study offers a new idea of combination of dihydroflavone and edible starch to better control the HCA formation in roasted meat products.
研究领域:
食品科学
·
营养学
·
致癌作用
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DOI
高影响因子
Biomaterials Science
·
2017
·Vol. 6
·期 1
·179-188
·
IF 4.21
Jing Li,Cuiting Zhang,Weiming He,Hongzhi Qiao,Jiahui Chen,KaiKai Wang,David Oupický,Minjie Sun
Kidney-specific delivery is critically important for the treatment of renal fibrosis with drugs such as salvianolic acid B (Sal B). Here we report a kidney-specific nanocomplex formed by the coordination-driven assembly of catechol-modified low molecular weight chitosan (HCA-Chi), calcium ions and Sal B. The prepared HCA-Chi-Ca-Sal B (HChi-Ca-Sal B) nanocomplex reversed the TGF-β1-induced epithelial–mesenchymal transition (EMT) in HK-2 cells. In vivo imaging demonstrated a kidney-specific biodistribution of the nanocomplex. The anti-fibrosis effect of HChi-Ca-Sal B was tested in a mouse model of unilateral ureteral obstruction (UUO). Significant attenuation of the morphological lesions and the levels of extracellular matrix (ECM) proteins in the tubulointerstitium was observed in mice treated with HChi-Ca-Sal B, suggesting that the nanocomplex was able to prevent fibrosis better than the treatment with free Sal B. It was concluded that the HChi-Ca-Sal B nanocomplex showed a specific renal targeting capacity and could be utilized to enhance Sal B delivery for treating renal fibrosis.
研究领域:
药理学
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生物医学工程
·
肾脏病学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL LETTERS
·
2019
·
IF 1.248
Bocheng Yu,Zhen Li,Jinyi Wu,Jiamin Ying,Yuqing Tang,Bingchu Wu,Chunlan Tang,Jinyan Xu
A high-performance liquid chromatography with fluorescence detection (HPLC–FLD) and principal component analysis (PCA) and hierarchical cluster analysis (HCA) were developed for the quality control of Gastrodia elata. The developed protocols were successfully applied to the analysis and evaluation of 47 batches of this material from eight regions. A standard fluorescence fingerprint for G. elata was established based on 12 common peaks measured in all samples and the similarities between sample fingerprints and standard fingerprint were almost greater than 0.85. The results of PCA and HCA analysis showed that the samples from the eight regions could be classified into three groups. The correlation between the fingerprints and antioxidant activities was investigated by a stepwise regression model and Pearson correlation analysis. Gastrodigenin and parishin E were screened and validated as potential antioxidant markers of G. elata. This study provides a valuable reference for the evaluation of G. elata and other herbal medicines or their related foods.
研究领域:
中药学
·
分析化学
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产品关联
DOI
高影响因子
BIOMATERIALS
·
2014
·
IF 8.312
Hongzhi Qiao,Minjie Sun,Zhigui Su,Ying Xie,Minglei Chen,Li Zong,Yahan Gao,Huipeng Li,Jianping Qi,Qun Zhao,Xiaochen Gu,Qineng Ping
Renal fibrosis is a common progressive kidney disease, and there is a lack of efficient treatment for the condition. In this study, we designed a kidney-specific nanocomplex by forming coordination-driven assembly from catechol-derived low molecular weight chitosan (HCA-Chi), metal ions and active drug molecules. The coordination activities of various metals and ligands, cytotoxicity, immunogenicity and biodistribution of HCA-Chi were investigated. Autofluorescent doxorubicin (DOX) was selected to fabricate HCA-Chi-Cu-DOX ternary nanocomplex for investigating cellular uptake behavior, transmembrane and targeting properties. The nanodevice demonstrated satisfactory stability under normal physiological conditions and pH-responsive drug release in acidic environments. Uptake of HCA-Chi-Cu-DOX by HK-2 cells was dependent on exposure time, concentration, and temperature, and was inhibited by blockers of megalin receptor. Tissue distribution showed that HCA-Chi-Cu-DOX nanocomplex was specifically accumulated in kidney with a renal relative uptake rate ( r e ) of 25.6. When active anti-fibrosis compound emodin was installed in HCA-Chi-Zn-emodin and intravenously injected to the ureter obstructed mice, obvious attenuation of fibrotic progression was exhibited. It was concluded that HCA-Chi coordination-driven nanocomplex showed special renal targeting capacity and could be utilized to develop drug delivery systems for treating renal fibrosis.
研究领域:
药学
·
纳米技术
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Bingsong Ma,Jiacai Wang,Binxing Zhou,Zihao Wang,Youyi Huang,Cunqiang Ma,Xinghui Li
To explore the impact of harvest season in white tea, high-performance liquid chromatography (HPLC) and amino acid analyzer were developed for the determinations of 17 phenolic compounds, 3 purine alkaloids, 19 amino acids, γ-aminobutyric acid (GABA) and 4 main quality components in 18 Bai mudan sub-type of Xinyang white teas harvested in spring, summer and autumn seasons, respectively. Additionally, the in vitro antioxidant capacity was evaluated by 5 various assays. Principal component analysis (PCA), hierarchical cluster analysis (HCA) and partial least squares-discriminant analysis (PLS-DA) could completely classify these white teas by the harvest season, and indicated its profound impact on chemical composition in white tea. 14 Characteristic compounds (VIP ≥1.0), such as (−)-epigallocatechin (EGC), gallic acid, caffeine, l -theanine, conduced to identify the harvest season of white tea. Through comparison, the spring tea was observed to possess the highest amino acids, catechins contents and in vitro antioxidant capacity. (−)-Epicatechin (EC), EGC, (−)-epicatechin gallate (ECG) and (−)-epigallocatechin gallate (EGCG) were considered as the major antioxidants in white tea due to their highly significantly ( p < 0.01) positive correlations. Overall, the research results provided support for the identification of harvest season in white tea.
研究领域:
食品科学
·
化学
·
农业科学
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产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2023
·
IF 8.1
Jingna Yan,Anxia Lu,Jirui Kun,Bei Wang,Yiwen Miao,Yingjuan Chen,Chi-Tang Ho,Qing Meng,Huarong Tong
Tea infected with bird’s eye spot disease generally imparts a long-lasting bitter taste, which is unacceptable to most consumers. This study has comprehensively evaluated the taste profiles of infected and healthy teas and investigated their known bitter compounds previously reported in tea. Quantification analyses and calculation of dose-over-threshold (DoT) factors revealed that no obvious difference was visualized in catechins, caffeine, bitter amino acids, and flavonols and their glycosides between infected and healthy tea samples, which was also verified by principal component analysis (PCA) and hierarchical cluster analysis (HCA). Therefore, these known bitter compounds have been ruled out as critical contributors to the long-lasting bitterness of infected teas. Furthermore, Gel permeation chromatography, sensory analysis, and UPLC-Q-TOF-MS were employed and identified 13 substances from the target bitter fractions, including caffeine, ten triterpenoids, and two oxylipins. The higher triterpenoid levels were supposed to be the reason causing the long-lasting bitterness. This study has provided a research direction for the molecular basis of the long-lasting bitterness of infected tea leaves with bird’s eye spot disease.
研究领域:
食品科学
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化学
·
植物病理学
·
感官科学
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产品关联
DOI
PubMed
高影响因子
Bioactive Materials
·
2023
·
IF 18.9
Nan Lyu,Daihua Deng,Yuting Xiang,Zeyu Du,Xiaohui Mou,Qing Ma,Nan Huang,Jing Lu,Xin Li,Zhilu Yang,Wentai Zhang
Thrombus formation and tissue embedding significantly impair the clinical efficacy and retrievability of temporary interventional medical devices. Herein, we report an insect sclerotization-inspired antifouling armor for tailoring temporary interventional devices with durable resistance to protein adsorption and the following protein-mediated complications. By mimicking the phenol-polyamine chemistry assisted by phenol oxidases during sclerotization, we develop a facile one-step method to crosslink bovine serum albumin (BSA) with oxidized hydrocaffeic acid (HCA), resulting in a stable and universal BSA@HCA armor. Furthermore, the surface of the BSA@HCA armor, enriched with carboxyl groups, supports the secondary grafting of polyethylene glycol (PEG), further enhancing both its antifouling performance and durability. The synergy of robustly immobilized BSA and covalently grafted PEG provide potent resistance to the adhesion of proteins, platelets, and vascular cells in vitro . In ex vivo blood circulation experiment, the armored surface reduces thrombus formation by 95 %. Moreover, the antifouling armor retained over 60 % of its fouling resistance after 28 days of immersion in PBS. Overall, our armor engineering strategy presents a promising solution for enhancing the antifouling properties and clinical performance of temporary interventional medical devices.
研究领域:
生物材料
·
生物医学工程
·
材料科学
·
血液学
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产品关联
DOI
PubMed
高影响因子
Catalysts
·
2020
·Vol. 10
·期 4
·401
·
IF 3.52
Mengzhao Jiao,Jie He,Shanshan Sun,Frank Vriesekoop,Qipeng Yuan,Yanhui Liu,Hao Liang
Carbonic anhydrase (CA) has received considerable attention for its ability to capture carbon dioxide efficiently. This study reports a simple strategy for immobilizing recombinant carbonic anhydrase II from human (hCA II) on Ni-based MOFs (Ni-BTC) nanorods, which was readily achieved in a one-pot immobilization of His-tagged hCA II (His-hCA II). Consequently, His-hCA II from cell lysate could obtain an activity recovery of 99% under optimal conditions. After storing for 10 days, the immobilized His-hCA II maintained 40% activity while the free enzyme lost 91% activity. Furthermore, during the hydrolysis of p-nitrophenyl acetic acid, immobilized His-hCA II exhibited excellent reusability and still retained more than 65% of the original activity after eight cycles. In addition, we also found that Ni-BTC had no fixation effect on proteins without histidine-tag. These results show that the Ni-BTC MOFs have a great potential with high efficiency for and specific binding of immobilized enzymes.Keywords:one-pot hydrothermal;immobilizing recombinant;His-hCA II;Ni-BTC nanorods
研究领域:
生物化学
·
材料科学
·
酶工程
·
催化
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产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Yuhan Jiang,Zixuan Zhou,Weile Kong,Ying Zhang,Lei Wang,Yaguang Sun,Mingchang Zhu,Shuangyan Wu
Development of new multi-ratiometric fluorescence probes has been a popular research field. This approach provides richer and more accurate information for the recognition of different substances which have similar chemical and physical properties. In this work, a ratiometric fluorescence sensor UIO-66⊃FL/RhB is successfully constructed by incorporating fluorescein (FL) and rhodamine B (RhB) to the UIO-66. With the addition of fluoroquinolones (FQs), the prepared UIO-66⊃FL/RhB sensor can be used for the 2D emission-fingerprint map, the linear discriminant analysis (LDA) and hierarchical clustering analysis (HCA) in recognition the presence of each FQs. The fluorescence probe offers a broad linear range (0-8 µM) and a low detection limit (3.7 nM) in sensing ofloxacin. In addition, a smartphone-assisted portable sensing platform and a portable UIO-66⊃FL/RhB hydrogel test material are constructed successfully for screening before fluorescence detection. This study proposes a novel multi-ratiometric fluorescence probe, which can recognize different FQs. Besides, the UIO-66⊃FL/RhB-based hydrogel beads are construction for screening before the detection of FQs, which established a promising strategy for the simple and accurate discrimination of FQs.
研究领域:
分析化学
·
材料科学
·
环境科学
·
传感器与执行器
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）