JOURNAL OF BIOMATERIALS APPLICATIONS
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2019
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IF 2.442
Yu Gao,Tao Liu,Xuan Liu,Chao Wu
Folic acid functionalized gelatin-coated mesoporous hollow carbon nanospheres (FGMCN) were synthesized and applied to enhance the antitumor curative effect of paclitaxel (PTX) for human liver cancer cell lines (SMMC-7721). PTX was loaded in FGMCN by the adsorption method and the PTX-loaded samples (PTX-FGMCN) had a drug content of 29.8 ± 1.06%. The PTX-FGMCN with a sustained release effect was characterized by X-ray diffraction and differential scanning calorimeter in order to analyze the PTX state in FGMCN. In vitro cell experiments showed that FMHSN improves the uptake of PTX and promotes apoptosis due to the nano-targeting effect of FMHSN. An in vivo tumor bearing experiment in mice indicated that the PTX-FGMCN significantly inhibited the growth of tumors. All of these results suggested that the PTX-FGMCN may be an effective anti-hepatoma drug in the future.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2019
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IF 2.931
Xiaoyan Du,Guangming Wen,Zhongping Li,Hung-Wing Li
Paper Sensor detection methods are attractive in wide analytical applications. Presented herein is a paper sensor and fluorescence methods that was firstly developed to detect curcumin (Cur) based on fluorescence resonance energy transfer (FRET) between nitrogen-doped carbon quantum dots (NCQDs) and Cur. The facile fluorescent method was demonstrated to detect Cur in the range of 0–2600 μM with a detection limit of 0.13 μM. And facile paper sensor of Cur was fabricated and displayed at concentration of 0 μM, 100 μM, 200 μM, 300 μM, 400 μM, 500 μM and 600 μM, respectively. In additions, it was realized for determination of Cur in real samples including orange juice and curry solution. Compared with the reported methods, the present method is simple, rapid and sensitive for detecting Cur.
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ACS Omega
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2019
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IF 2.584
Pengfei Guo,Shengyun Liao,Xinli Tong
Hydrolysis of the biomass platform compound furfural can produce a bulk of fine chemicals because of its multiple functional groups. Developing an efficient catalytic system to regulate the process toward some desirable products has always been a hot research area. Herein, the novel Ni-based catalysts (Ni-MFC-X, X = 300, 400...800) synthesized by pyrolysis of the 2D Ni-based metal–organic framework (MOF) in the temperature range 300–800 °C show good performance for selective hydrogenation of furfural (FUR). Interestingly, the calcination temperature of the MOF precursor plays an important role in hydrogenation of furfural with controllable selectivity toward furfuryl alcohol (FOL) and tetrahydro FOL (THFOL). Ni-MFC-500 affords us 92.5% conversion of furfural and 59.5% selectivity of FOL. Ni-MFC-700 can promote hydrogenation of furfural with 91.8% conversion and 51.0% selectivity of THFOL. Furthermore, the stability of as-obtained Ni-MFC-500 and Ni-MFC-700 was also very impressive in this reaction system.
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Journal of Materials Chemistry B
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2019
·Vol. 7
·期 44
·7006-7013
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IF 5.047
Li Zhang,Xiaoni Ma,Hongbo Liang,Huihui Lin,Guangyu Zhao
Non-enzymatic glucose sensors are attracting significant attention owing to their low cost, storage convenience and reusability; however, their poor anti-interference caused by their weak selectivity towards glucose limits their practicability. In the present study, a MIL-53(NiFe) metal–organic framework (MOF) was prepared on Ni foam to serve as a self-supported electrode for non-enzymatic glucose detection. Due to the abundant active sites in the MIL-53(NiFe) MOF and its good stability in an alkaline solution, the sensors exhibited a high sensitivity (41.95 mA mM−1 cm−2) and a low detection limit (0.67 μM). Moreover, the molecular sieve effect of the MIL-53(NiFe) MOF led to a remarkable anti-interference ability, even at the interference concentrations of up to 20% glucose, a higher value than that in human serum. In addition, a heat treatment was carried out to remove the residual terephthalic acid in the MOF tunnels, and this promoted the detection linear range to 2–1600 μM. The reusability, reproducibility and long-term stability of the sensors were also studied, and the results implied good practicability of the MIL-53(NiFe) MOF-based sensors. Furthermore, the good practicability of the sensors was verified by testing human serum samples. The results showed the relative standard deviation of 2.73% from the hospital results, and the standard recovery was nearly 100%.
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FOOD CHEMISTRY
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2019
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IF 5.399
Shi-Qi Zhang,Jing Li,Lin Li,Xiaoting Yuan,Li Xu,Zhi-guo Shi
In the present study, submicrometer flow-through silica microspheres (Sub-FTSiO 2 ) was for the first time obtained via a suspension polymerization method coupled with sol-gel transition and phase separation. The Sub-FTSiO 2 was characteristic of rich mesopores, penetrable macropores and small particle size, which would be beneficial to fast mass transfer, low column backpressure and high column efficiency. It was directly used as the hydrophilic interaction liquid chromatographic (HILIC) stationary phase, and the fast separation of seven water-soluble vitamins in 2.2 min was realized. The proposed method was successfully applied to the determination of water-soluble vitamins in two functional beverages on the market. The prepared Sub-FTSiO 2 was well demonstrated for fast HILIC, and would be potential as the stationary phase matrix for fast liquid chromatography in diverse separation modes.
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BIOSENSORS & BIOELECTRONICS
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2019
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IF 9.518
Hui He,Pir Muhammad,Zhanchen Guo,Qiling Peng,Haifeng Lu,Zhen Liu
Plasmon-enhanced fluorescence (PEF) is an emerging technology for sensitive detection . It relies on the plasmonic effect of a noble metal nanostructure to dramatically enhance the fluorescence of target fluorophores around the metal surface. Because there is a compromise between plasmonic enhancement and fluorescence quenching , it is critical to control the distance between the fluorophore and the metal surface to an appropriate range. This makes the fabrication of plasmonic nanostructures for PEF assays a challenging task. Herein, we report a controllably prepared core-shell plasmonic nanostructure coated with molecularly imprinted polymer (MIP) for sensitive and specific PEF assay. Riboflavin (RF) was used as a test compound in this study. RF-imprinted Ag@SiO 2 nanoparticles were prepared in a controllable manner, providing an optimal distance between the metal surface and RF molecules. The obtained hybrid nanostructure allowed for sensitive detection and specific recognition towards the target. Based on the plasmonic hybrid nanostructure, a sensitive and specific PEF assay of RF was developed and successfully applied to the determination of RF in human urine. Thus, the study paved the way for controllable preparation of molecularly imprinted plasmonic nanostructures for sensitive and specific PEF assays.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2019
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IF 3.571
Cun-Duo Tang,Peng-Ju Ding,Hong-Ling Shi,Yuan-yuan Jia,Mao-zhi Zhou,Hui-lei Yu,Jian-He Xu,Lun-Guang Yao,Yun-Chao Kan
Phenylglyoxylic acid (PGA) are key building blocks and widely used to synthesize pharmaceutical intermediates or food additives. However, the existing synthetic methods for PGA generally involve toxic cyanide and complex processes. To explore an alternative method for PGA biosynthesis, we envisaged cascade biocatalysis for the one-pot synthesis of PGA from racemic mandelic acid. A novel mandelate racemase named ArMR showing higher expression level (216.9 U·mL–1 fermentation liquor) was cloned from Agrobacterium radiobacter and identified, and six recombinant Escherichia coli strains were engineered to coexpress three enzymes of mandelate racemase, d-mandelate dehydrogenase and l-lactate dehydrogenase, and transform racemic mandelic acid to PGA. Among them, the recombinant E. coli TCD 04, engineered to coexpress three enzymes of ArMR, LhDMDH, and LhLDH, can transform racemic mandelic acid (100 mM) to PGA with 98% conversion. Taken together, we provide a green approach for one-pot biosynthesis of PGA from racemic mandelic acid.
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NEW JOURNAL OF CHEMISTRY
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2019
·Vol. 43
·期 6
·2694-2701
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IF 3.069
Yuan Zhang,Yang Xing,Ming Xian,Shaomin Shuang,Chuan Dong
Herein, distinctive nanomaterial-based mesoporous silica nanoparticles (MSNs) successively coupled with bovine serum albumin (BSA) and folic acid (FA) were engineered for targeting the release of epirubicin (EPI). The BSA molecule as a “gatekeeper” prevents untimely drug leakage until the BSA coating layer is biodegraded in response to GSH. FA promotes the specific intracellular delivery of the drug to high folate receptor (FR)-expressing cancer cells to improve the efficacy of chemotherapy. In vitro drug release profiles show that this drug carrier can avoid premature release of the drug under physiological conditions, and redox-responsive EPI release from EPI/MSN-FA with easy biodegradability is significantly accelerated in the presence of GSH due to the cleavage of the intramolecular disulfide bond; thus, a “redox-triggered release” of the drug in the simulated targeted tissue microenvironment is achieved. The folate-mediated cellular uptake measured by confocal laser scanning microscopy (CLSM) shows that the hybrid nanoparticles more likely enter the FR-positive (FR+) HepG2 cells than the FR-negative (FR−) PC-12 cells. Toxicity experiment also demonstrates the negligible toxicity of MSN-FA and an increase in the antitumor suppression of EPI/MSN-FA with an increase in the dosage. The results show that the strategy of combining mesoporous silica with protein molecules having stimuli-responsive biodegradability will offer new potential directions towards the “on-demand” drug release for pinpoint chemotherapy in cancer treatment.
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ANALYTICAL CHEMISTRY
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2019
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IF 6.35
Jian-Yu Yang,Ting Yang,Xiao-Yan Wang,Yi-Ting Wang,Meng-Xian Liu,Ming-Li Chen,Yong-Liang Yu,Jian-Hua Wang
The discrimination of various sulfur -containing species helps us to deeply understand how sulfur affects cellular signaling and other physiological events. Herein, we present a three-dimensional sensor array based on simultaneous variation of the optical properties (fluorescence, light scattering, and UV–vis absorption) of gold–silver alloy nanocluster (AuAgNCs)–gold nanoparticle (AuNPs) composite for the rapid identification of 13 sulfur-containing species and sulfur-oxidizing bacteria. The sensor array is fabricated based on the strong coordination interactions between sulfur-containing compounds and AuAgNCs on the surface of AuNPs. The sulfur species of interest exhibit different affinities toward AuAgNCs and generate unique optical properties. These response patterns could divide the analytes into three categories including organic sulfide, inorganic sulfide, and thiols. Thirteen types of sulfur species including cystine, methionine, GSSG, S2–, SO32–, S2O32–, S2O72–, S2O82–, S4O62–, GSH, N-acetyl-l-cysteine, homocysteine, and cysteine can be well distinguished by the sensor array with principal component analysis at 0.5 μM. Moreover, sulfur-oxidizing bacteria and nonsulfur bacteria can also be well discriminated at a level of OD600 = 0.005.
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TALANTA
·
2019
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IF 4.916
Shengnan Wang,Shuai Liu,Jianyu Zhang,Yan Cao
As indispensable and strategic elements, Rare Earth Elements (REEs) have been found wide high-tech applications in many modern industries. Their mining, extraction and purification address on economic and environmental significances. This study was the first to report the successful determination and differentiation of rare earth metals using the Nitrogen-doped Carbon Dots (NCDs). NCDs were synthesized via the one-step hydrothermal treatment method starting from folic acid . The as-received NCDs can emit bright blue fluorescence at 440 nm in a high quantum yield of 85% due to the fluorescence enhancement effect of N dopant atoms on NCDs’ surface. This as-received NCDs can not only determine REE ions based on the fluorescence quenching effect of the newly-formed REE-NCDs complexes, also distinguish two groups of REEs with significantly different electronic structures. It was found REE ions (Group II REEs: Pr 3+ , Nd 3+ , Sm 3+ , Eu 3+ , Gd 3+ , Tb 3+ , Dy 3+ , Ho 3+ , Er 3+ , Tm 3+ , Yb 3+ ) can only quench fluorescence of the initial NCDs solution, but not change its fluorescence wavelengths. This was contrasted to the similar quenching effect of REE ions (Group I REEs: La 3+ , Y 3+ , Lu 3+ ) on NCDs, but further 20 nm red-shift of the fluorescence wavelength (from 439 nm to 458 nm). Taking examples of the selected La 3+ and Sm 3+ , their detection limit were found to be 0.045 μM (the linear range of 0–6 μM, R 2 =0.998) and 0.29 μM (the linear range of 0–10 μM, R 2 =0.993), respectively. The characterizations of NCDs, based on the ultraviolet and visible spectrophotometry (UV–VIS), X-ray photoelectron spectrometer (XPS) and Fourier Transform infrared spectroscopy (FTIR), helped in revealing the coordination status of rare earth ions on the carboxyl group of the NCDs surface and also mechanisms of their electron and energy transfers.
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ACS Applied Materials & Interfaces
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2019
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IF 8.456
Lile Dong,Peng Zhang,Xiangjian Liu,Ruiping Deng,Kaimin Du,Jing Feng,Hongjie Zhang
Recent development of precise nanomedicine has aroused an overwhelming interest in integration of diagnosis and treatment for cancers. Designing renal-clearable and targeting nanoparticles (NPs) has specific cancer theranostic implications and remains a challenging task. In this work, the ultrasmall folic acid (FA) and bovine serum albumin-modified Bi–Bi2S3 heterostructure nanoparticles NPs (Bi–Bi2S3/BSA&FA NPs) with excellent computed tomography (CT) and photoacoustic imaging abilities and outstanding photothermal performances were synthesized in an aqueous phase route via a simple method. Bi–Bi2S3/BSA&FA NPs have the following criteria: (i) Bi–Bi2S3/BSA&FA NPs with heterostructure possess better stability than Bi NPs and higher Bi content than Bi2S3 NPs, which are conducive to the enhancement of CT imaging effect; (ii) Bi–Bi2S3/BSA&FA NPs with FA molecules on the surface could target the tumor site effectively; (iii) Bi–Bi2S3/BSA&FA NPs could inhibit tumor growth effectively under 808 nm laser irradiation; (iv) ultrasmall Bi–Bi2S3/BSA&FA NPs could be cleared through kidney and liver within a reasonable time, avoiding a long-term retention/toxicity. Therefore, the renal clearable Bi–Bi2S3/BSA&FA NPs are a promising agent for targeting cancer theranostics.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2019
·
IF 2.931
Zhao,Jianhao,Yaling
The application of fluorescent carbon dots in bio-imaging has huge positive significance in the field of biomedicine. By taking this advantage, herein we prepared nitrogen, sulfur and iodine doped carbon dots (N,S,I-CDs) by a facile hydrothermal reaction using C 3 N 3 S 3 , potassium iodate (KIO 3 ) and ethylenediamine (EDA), and the obtained N,S,I-CDs show bright blue fluorescence with a high fluorescence quantum yield of about 32.4%. The prepared N, S, I-CDs could interact with the folic acid (FA) with high selectivity, lead to development of a high sensitive method for the FA detection from 0.1 to 175 μM wide linear range with a detection limit of 84 nM (S/N = 3) and also applied them in U-2 OS cells imaging. Moreover, this sensor possessed a good sensitivity, linearity and reversibility in the temperature range of 10–80 °C, and successfully applied for the temperature sensing in cell HT-29 samples. This investigation illustrates that as-prepared N, S, I-CDs probe may have great potential as a high-performance platform for the accurate recognition of temperature in cells and could provide a new tool for the detection of FA in cells.
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