APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zihan Zhu,Jing Qi,Xiong Tong,Zhenlei Cai
Improving the flotation recovery of scheelite is an ongoing problem. In this study, N -(3-(octylamino)) hydroxamic acid (NOHA) was designed as a strong collector to strengthen the enrichment of scheelite without the pre-activation of lead nitrate. Micro-flotation results indicated that NOHA exhibited excellent collecting capability in scheelite flotation, achieving more than 95.0% scheelite recovery at pH 8.0 under 2.0×10 −4 mol/L. Zeta potential investigations found that NOHA effectively adsorbed on scheelite surface. The enhanced adsorption was attributed to the protonated amino group (-NH 2 + -), which promoted the chelation of hydroxamate on the negatively-charged scheelite surface. Comprehensive characterization through Fourier transform infrared spectroscopy (FTIR), contact angle, and adsorption capacity verified that the treatment of NOHA strengthened the hydrophobicity of scheelite. X-ray photoelectron spectroscopy (XPS) analyses further indicated that the hydroxamate group in NOHA mainly anchored on the scheelite surface through the interaction with calcium sites. Therefore, NOHA offered an excellent collector in scheelite flotation.
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Xuejiao Wang,Zhi Su,Lan Zheng,Kaifa Zhao,Qiyang Cai,Xiangyu Wei,Yaqing Zhao,Yan Ke,Yuelu Fan,Hu Zhu
Inspired by nature's sophisticated use of light energy, we report a bioinspired antibacterial trap switch operating without exogenous competitors. This work engineers a light-gated supramolecular system where host-guest conformational reorganization between cucurbit[8]uril (CB[8]) and dicationic symmetric azobenzene derivative (Azo- E ) enables precise control over antimicrobial agent release. Upon ultraviolet (UV) irradiation triggers E - Z isomerization, enhancing its binding affinity to CB[8] and resulting in steric displacement of the encapsulated antibacterial agent through conformational reorganization. This system achieves >99.9% bacterial eradication, supports reversible switching across four conventional antibacterial agents, and reduces mammalian cell cytotoxicity. Spray-coatable on different biomaterial surfaces, it demonstrates spatial precision for localized disinfection. This molecular engineering establishes a general platform for spatiotemporally precise regulation of bioactive cargoes, enabling adaptive supramolecular systems with infection control.
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产品关联
DOI
PubMed
高影响因子
ACS Applied Optical Materials
·
2022
·
IF 0
Yixuan Guo,Damien Boyer,François Reveret,Federico Cisnetti,Geneviève Chadeyron,Fabrice Leroux,Yongjun Feng
Subject to the aggregation-caused quenching mechanism in the solid state, perylene and its derivatives turn out to be fascinating organic fluorophores when separated from each other by their cointercalation within a layered double hydroxide host structure. Such accommodation with surfactant spacers limits their stacking usually caused by π–π interaction between neighboring cores. For each series of fluorophores having substitution in bay or diimide positions, an optimized composition is selected based on optical performances and in particular on the absolute photoluminescence quantum yield. The optimal relative quantity of phosphor is very low from 0.001 to 0.1% of the total anionic capacity. When dispersed into a silicone matrix, the loaded films cover from green (510 nm) to red (625 nm) emission depending on the perylene derivative molecules. With loaded films overlaid on a blue chip, a warm white light (color-correlated temperature = 3890 K) with a color-rendering index as high as 91.1 is reached. In such a light-emitting diode configuration, the superposition of films for each fluorophore is preferred to the powder mixture or to the cointercalation of organic phosphors within the same structure in order to avoid too strong and nonpredictable reabsorption phenomena between emitting centers.
研究领域:
材料科学
·
有机光电子学
·
纳米化学
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DOI
PROCESS BIOCHEMISTRY
·
2012
·
IF 2.627
Chao-Jun Pei,Jinhyuk Lee,Yue-Xiu Si,Sangho Oh,Wei-An Xu,Shang-Jun Yin,Guo-Ying Qian,Hong-Yan Han
We studied the inhibitory effect of gastrodin on tyrosinase using inhibition kinetics and computational simulation. Gastrodin reversibly inhibited tyrosinase in a mixed-type manner with K i = 123.8 ± 20.2 mM. Time-interval kinetics revealed the inhibition to be a first-order process with mono- and bi-phasic components. Using AutoDock Vina, we calculated a binding energy of −6.3 kcal/mol for gastrodin and tyrosinase, and we performed a molecular dynamics simulation of the tyrosinase–gastrodin interaction. The simulation results suggested that gastrodin interacts primarily with histidine residues in the active site. A 10-ns molecular dynamics simulation showed that one copper ion in the tyrosinase active site was responsible for the interaction with gastrodin. Our study provides insight into the inhibition of tyrosinase by the hydroxyl groups of gastrodin. A combination of inhibition kinetics and computational calculations may help to confirm the inhibitory action of gastrodin on tyrosinase and define the mechanisms of inhibition.
研究领域:
生物化学
·
药物化学
·
计算生物学
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DOI
高影响因子
PHYTOPATHOLOGY
·
2014
·Vol. 104
·期 10
·
IF 2.746
Amara R. Dunn,Stephen R. Bruening,Niklaus J. Grünwald,Christine D. Smart
Populations of the vegetable pathogen Phytophthora capsici are often highly diverse, with limited gene flow between fields. To investigate the structure of a newly established, experimental population, an uninfested research field was inoculated with two single-zoospore isolates of P. capsici in September 2008. From 2009 through 2012, ≈50 isolates of P. capsici were collected from the field each year and genotyped using five microsatellite loci. The same two isolates were also crossed in the lab. High levels of diversity were detected in the research field, with 26 to 37 unique multilocus genotypes detected each year. Through 2012, genotypic diversity did not decline and no evidence of genetic drift was observed. However, during the 2011 and 2012 growing seasons, four new alleles not present in either parental isolate were observed in the field. Selfing (but not apomixis) was observed at low frequency among in vitro progeny. In addition, evidence for loss of heterozygosity was observed in half of the in vitro progeny. These results suggest that recombination, mutation, and loss of heterozygosity can affect the genetic structure observed in P. capsici populations.
研究领域:
植物病理学
·
遗传学
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DOI
高影响因子
Sustainability
·
2019
·Vol. 11
·期 19
·5149
·
IF 2.592
Weiping Jiang,Lirong Luo,Zezhou Wu,Jianbo Fei,Maxwell Fordjour Antwi-Afari,Tao Yu
Prefabrication is a technology that can reduce the material consumption during the construction process. Thus, it is regarded as a technology that be of assistance in the pursuit of sustainable development in the construction industry. In China, a series of policies has been formulated to promote the implementation of prefabrication; however, the effectiveness of these policies has not been investigated. The aim of this paper is to evaluate the effectiveness of the current prefabrication incentive policies in China. To achieve this research aim, a policy framework was first developed in order to understand the existing policies. Then, four indicators—namely, the number of prefabricated component production enterprises, the prefabricated floor area, the prefabricated building market size, and the expected prefabricated building area ratio—were selected to evaluate each policy’s effectiveness. It was found that the growth rates of these four indicators had increased slowly, and had even shown declining trends before 2015; however, with the incentive policies promulgated after 2015, the growth rates have increased. This study is of value not only in helping readers to understand the existing framework of incentive policies in China, but also in revealing the effectiveness of the identified prefabrication incentive policies. These research findings can also provide insights useful for policy formulation in other jurisdictions for the promotion of prefabrication.
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 13
·7377-7383
·
IF 3.119
Qingqing Liu,You Liu,Bingxin Lu,Yuting Wang,Yanglei Xu,Jin Zhai,Xia Fan
Inspired by functionalized biological ion channels, artificial channels were prepared to mimic the natural ones. The key concept behind the rectifying phenomena in nanochannels is the construction of asymmetric restrictive nanochannels. Here, we prepared nanoporous oxidized polyvinyl alcohol (PVA) and WO3 composite coatings on hourglass-shaped anodic aluminum oxide (AAO) nanochannel surfaces. Accordingly, a special “ion pool” is formed between the homogeneous junction in the middle of the AAO and the nanoporous PVA/WO3 film-covered AAO surface and its two ends are greatly nano-confined. Ion enrichment and ion depletion occur in the “ion pool” and are dependant on the applied voltage polarity. A rectification ratio of 458, which is in accordance with the highest value found in previous reports, was obtained from the cooperative effects of the two small open ends of the “ion pool”. Furthermore, this value is enhanced to about 2000 under constant voltage. An excellent pH-sensitive rectification property, with a single rectification direction from acidic to basic conditions, has also been demonstrated.
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DOI
高影响因子
DALTON TRANSACTIONS
·
2010
·Vol. 40
·期 17
·4397-4401
·
IF 4.081
Haowei Lin,Huibiao Liu,Xuemin Qian,Canbin Ouyang,Yuliang Li
Controlling the fabrication of the nanowire–nanotube junctions of a dichloro-bridged dimeric iridium complex of 2-phenylpyridine (IPPC) has been achieved by a facile template method. IPPC nanowire–nanotube junctions were prepared at 15 °C, and IPPC nanotubes could be formed by increasing the temperature. It is interesting that IPPC solid nanowires were produced when the temperature decreased to 0 °C. The results show that temperature is a key factor for controlling the process of growth. The emission of the IPPC nanostructures showed a blue shift and a stronger intensity in comparison to IPPC bulk materials.
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DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Dongyue Jiang,Fei Guo,Minyi Xu,Jingcheng Cai,Shuo Cong,Ming Jia,Guijun Chen,Yongchen Song
Utilizing the kinetic energy of a flowing river for irrigation could be tracked back to Hellenistic and Roman periods. In modern days, hydroelectric plants are built for harvesting the kinetic energy of the flowing river. However, a large investment is required in the hydroelectric plants for maximizing the power output . Here we present a low-cost and scalable TENG (triboelectric nanogenerators) based energy harvesting water wheel (ww-TENG). The water wheel works in a sliding freestanding TENG mode which generates power from the charges flow induced by contact electrification and electrostatic induction. A conformal fluorine coated carbon paper (f-CP) was employed to form the alternate electrodes. The deposited fluorine layer provides the benefits of high affinity to attract electrons as well as hydrophobicity for water repelling. The carbon paper offers a high electrical conductivity and rough structure to form a superhydrophobic property. These features enables a large charge induction and fast water/TENG separation for maximizing the power output of the energy harvesting water wheel. A lab-scale water wheel (diameter 10 cm and width 2.5 cm) is fabricated and a maximum 5.3 μW output power was measured under 50 MΩ resistance at a linear flow velocity of 2.6 m/s. The ww-TENG was employed for charging a 10 μF capacitor to 16 V and lighting up a commercial LED light bulb . As a comparison, an electromagnetic generator (EMG) could only charge the capacitor to 2.7 V with the same period of time. The EMG obtains a high power output at low load resistance case (< 100 kΩ) while the ww-TENG generates high power when the load resistance is large (> 10 MΩ). The present ww-TENG shows great potential for harvesting the kinetic energy from flowing river and targets for the applications with large load resistance like electrostatic systems.
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 11
·期 1
·498-505
·
IF 1.5
Jian Lu,Jianling Li,Zhixun Zhu,Yuguang Zhao,Cheng Chen,Feiyu Kang
Porous Co 3 Mo 3 N nanorods were prepared by hydrothermal process combined with ammonia annealing and applied as catalyst in Li-O 2 battery cell. The battery with the porous Co 3 Mo 3 N nanorods showed a higher initial discharge capacity of 7902.8 mAh/g c at current density of 100 mAh/g c than that with the pure Ketjen black. Moreover, the Co 3 Mo 3 N-based electrode displayed lower overpotential and better cycling performance than that of the carbon-only cathode. Such performance can be associated with the synergistic effects of high electrocatalytic activity and porous structure of the Co 3 Mo 3 N nanorods.
研究领域:
材料科学
·
电化学
·
储能
·
纳米材料
·
催化
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DOI
高影响因子
Acta Biomaterialia
·
2017
·
IF 6.319
Fuli Zhao,Di Wu,Dan Yao,Ruiwei Guo,Weiwei Wang,Anjie Dong,Deling Kong,Jianhua Zhang
Long-term and daily subcutaneous injections of insulin for the treatment of insulin-dependent diabetic patients often lead to poor patient compliance and undesired complications. Phenylboronic acid (PBA)-based polymeric hydrogels have been widely considered as one of the most promising insulin delivery system to replace the frequent insulin injections. However, their applications are limited by clinically irrelevant glucose-responsive range, slow response rate, low tissue-adhesiveness and poor biodegradability, undesirable leakage at normoglycemic state. Herein, we report a novel implantable insulin hydrogel for glucose-regulated delivery of insulin based on a unique particle-hydrogel hybrid platform featuring fast glucose responsiveness at physiological pH, shear-thinning behavior for injection, tissue-adhesive function for long-lasting adherence, and full biodegradability for safe use. The system was thoroughly characterized both in vitro and in vivo and was demonstrated to hold these unique functions. Using streptozotocin-induced diabetic mice as a model, it was shown that a single subcutaneous injection of the insulin-loaded particle-hydrogel formulation led to quasi-steady-state blood glucose levels within the normal range for about two weeks. In addition, the preparation of the formulation only involved simple mixing and self-assembling processes, and thus it had great scalability and reproducibility for practical use. The highly feasible preparation, excellent performance, inherent biocompatibility and biodegradability make this novel composite hydrogel promising platform for diabetes therapy. Statement of Significance Phenylboronic acid (PBA)-based polymeric hydrogels have been widely considered as one of the most promising insulin delivery system to replace the frequent insulin injections. However, these hydrogels, mostly based on a variety of PBA-containing acrylamide monomers , are still far from clinical reality. Building upon a unique particle-hydrogel hybrid platform, herein we report a novel implantable insulin storage and delivery system with multifunctionalities including fast glucose-sensitiveness at physiological pH, shear-thinning behavior for injection, tissue-adhesive function for long-lasting adherence, biodegradable materials for safe use and well-controlled insulin release. These unique functions were demonstrated through research both in vitro and in vivo . In addition, the preparation of the formulation was simple, and thus it had great scalability and reproducibility for practical use.
研究领域:
生物医学工程
·
药物递送
·
生物材料
·
糖尿病研究
·
高分子科学
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DOI
高影响因子
ORGANIC LETTERS
·
2019
·
IF 6.555
Qian Xiong,Gonglin Li,Shunxi Dong,Xiaohua Liu,Xiaoming Feng
Catalytic asymmetric synthesis of hydrothiazole derivatives was developed via a well-organized formal [2 + 1 + 2] cycloaddition reaction triggered by asymmetric addition of isocyanide to alkylidene malonate. Various chiral hydrothiazole derivatives were readily provided in good yield with high enantioselectivity (up to 98% yield, 98.5:1.5 er) utilizing a chiral Mg(OTf)2/N,N′-dioxide complex as the catalyst under mild conditions. Based on the experimental studies and the structure of the catalyst, a possible catalytic cycle was proposed to elucidate the reaction process and activation mode.
研究领域:
有机化学
·
不对称合成
·
杂环化学
·
催化
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DOI
高影响因子
危险品化学品经营许可证（带存储）