CHEMICAL ENGINEERING JOURNAL
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2016
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IF 5.31
Luhua Jiang,Yunguo Liu,Shaobo Liu,Xinjiang Hu,Guangming Zeng,Xi Hu,Simian Liu,Shaoheng Liu,Binyan Huang,Meifang Li
A novel adsorbent, namely, β-cyclodextrin/poly ( l -glutamic acid) supported magnetic graphene oxide (CGMG), was synthesized through a facile chemical route and its application as excellent adsorbent for 17β-estradiol (E2) removal from aqueous solution was also demonstrated. The characteristics of CGMG were investigated via using Fourier transform infrared spectrometer, X-ray photoelectron spectroscopy, Raman spectra, X-ray diffraction, vibrating sample magnetometer and Brunauer-Emmett-Teller surface area, respectively. Results indicated that CGMG was successfully prepared and the saturated magnetization could reach up to 0.09043 emu/mg. Meanwhile, investigation of adsorption behavior illustrated that the adsorption process could be better fitted by the pseudo-second-order and Langmuir models. Analysis of intraparticle diffusion model demonstrated that intraparticle diffusion was not the only rate-limiting step; however, both film diffusion and intraparticle diffusion were involved in the diffusion process. Thermodynamic study indicated that adsorption of E2 onto CGMG was spontaneous and endothermic. The E2 uptake by CGMG decreased in high pH values. However, it was insensitive to ionic strength variation (0.0–0.1 M). Moreover, the regeneration experiments illustrated that CGMG could be recovered, and it showed good recycling ability with ca. 88.7% of the initial sorption capacity after being used for sixth cycles.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2017
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IF 2.714
Yun-Xia Wang,Kiran Gupta,Jian-Rong Li,Baoling Yuan,Jia-Cheng E. Yang,Ming-Lai Fu
A novel easily separated magnetic chalcogenide composite, KMS-1/L-Cystein/Fe 3 O 4 (KCF), was successfully synthesized using bifunctional linker (L-Cystein) to connect KMS-1 and Fe 3 O 4 nanoparticles, and was examined to remove ciprofloxacin (CIP) from aqueous solution. The composite was thoroughly characterized by XRD, SEM, EDX, FTIR and magnetization measurements techniques. The adsorption experiments were carried out and investigated under different conditions, such as contact time and pH of solution. The CIP removal reaction was found to better follow a pseudo-second-order kinetic model than the pseudo-first-order. The Langmuir adsorption isotherm was employed to understand the removal process. The pH of solution is critical for the adsorption of CIP on KCF, and the maximum adsorption (181.32 mg/g) of CIP could be reached under pH 6. In addition, the KCF adsorbent showed magnetization and operational stability, and it could be readily separated from solution by applying an external magnetic field. The high stability, performance, inexpensive, and easily recyclable KCF composite may serve as a promising adsorbent for water treatment.
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Energy Technology
·
2017
·Vol. 5
·期 8
·1195-1199
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IF 2.789
Yuanhao Cai,Yulong Chen,Qijie Li,Liang Li,Haoxin Huang,Suying Wang,Weixing Wang
We demonstrate that l -methionine, a natural amino acid, can be used to dramatically enhance CO 2 uptake kinetics in the formation of CO 2 hydrate without the use of energy-intensive mixing technologies or environmentally harmful chemicals. To the best of our knowledge, l -methionine is the most effective promoter to enhance CO 2 hydrate formation (at a concentration of 0.2 wt %, the gravimetric capacity reached up to 356 mg g −1 in 1000 min, and t 90 (the time to achieve 90 % of this capacity) was only 15 min). We also present a tentative explanation for the promotion mechanism of l -methionine in the formation of CO 2 hydrate from the point of view of structure–property relationship that will help search for more effective promoters. Our results may offer the possibility of practical application of hydrate-based CO 2 capture and storage technology.
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JOURNAL OF NANOPARTICLE RESEARCH
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2016
·Vol. 18
·期 7
·1-9
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IF 2.101
Wan Xuejuan,Li Shifeng,Zhuang Lulu,Tang Jiaoning
l -Tryptophan-capped carbon quantum dots ( l -CQDs) were facilely synthesized through “green” methodology, and the obtained material was utilized as a sensitive and selective fluorescence sensor for mercury ion (Hg 2+ ) in pure aqueous solutions. Carboxyl-functionalized CQDs were first green synthesized by a one-step hydrothermal route, and l -tryptophan was then attached to CQDs via direct surface condensation reaction in aqueous solution at room temperature. The as-synthesized l -CQDs had an average size of ca. 5 nm with a good dispersity in water, and exhibited a favorable selectivity for Hg 2+ ions over a range of other common metal cations in aqueous solution (10 mM PBS buffer, pH 6.0). Upon the addition of Hg 2+ , a complete fluorescence quenching (ON–OFF switching) of l -CQDs was evident from the fluorescence titration experiment, and the fluorescence detection limit of Hg 2+ was calculated to be 11 nM, which indicated that the obtained environmentally friendly l -CQDs had sensitive detection capacity for Hg 2+ in aqueous solution.
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POLYMER ENGINEERING AND SCIENCE
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2024
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IF 3.2
Honglin Li,Wanjun Liu,Zhize Chen
An efficient and scalable method to prepare oligolactic acid stereocomplex microplates (SC-OLA-MPs) is developed. Oligolactic acid was firstly synthesized via the melt polycondensation of lactic acid. Then, the oligo ( L -lactic acid) and oligo ( D -lactic acid) were crystallized with a mixture of dichloromethane and acetone, and consequently the stereocomplex microparticles were obtained in the form of circular microplates with a diameter of approximately 2 μm. As an eco-friendly nucleating agent, SC-OLA-MPs were introduced into poly ( L -lactic acid) (PLLA) via melt blending. The nonisothermal and isothermal crystallization of the SC-OLA-MPs/PLLA composites were investigated, and the crystal morphology and heterogeneous nucleation phenomena during the isothermal crystallization process were photographed with POM. SC-OLA-MPs show excellent nucleating effects on PLLA crystallization. With the incorporation of 10% SC-OLA-MPs, the crystallization half-time of the SC-OLA-MPs/PLLA composite decreased from 7.18 to 0.45 min at 100°C, compared to the neat PLLA. Through a short-time molding procedure, the thermal deformation temperature of PLLA is improved by the addition of SC-OLA-MPs. Highlights Polylactic acid stereocomplex microplates were fabricated by solution crystallization. This method is easy and scalable. This microplate is an effective nucleating agent for PLLA.
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JOURNAL OF ETHNOPHARMACOLOGY
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2024
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IF 4.8
Guoying Zhang,Wenjing Jia,Liying Liu,Luya Wang,Jiyu Xu,Jihong Tao,Mingting Xu,Min Yue,Huiqin Luo,Ping Hai,Huilan Yue,Dejun Zhang,Xiaohui Zhao
Ethnopharmacological relevance The incidence of cholestatic liver disease (CLD), which is primarily marked by abnormal bile acids (BAs) metabolism and can result in significant hepatic injury, is rising. Nevertheless, there remains a lack of effective treatments and drugs in clinical practice. Silphium perfoliatum L. (SP) is rich in various structural types of caffeoylquinic acid (CQA) compounds, and it is a traditional herb of North American Indians with hepatobiliary therapy effects. However, its therapeutic effect and mechanism of action on CLD have never been studied. Aim of the study To determine if SP-8, an extract rich in CQAs from SP, protects against cholestatic liver injury induced by alpha-naphthylisothiocyanate (ANIT) and to clarify its mechanism based on the farnesoid x receptor (FXR) signaling pathway and enterohepatic circulation of BAs. Materials and methods The therapeutic efficacy of SP-8 was evaluated by assessing the serum biochemical indices, inflammatory factors, and liver histopathology. Targeted metabolomics of the BAs was studied in the feces, liver, serum, and bile using UPLC-MS/MS. Additionally, a Western blot analysis was used to examine the expression levels of the peroxisome proliferator-activated receptor γ (PPARγ), the FXR, and proteins related to the synthesis and transport of BAs. 16S rRNA gene sequencing was performed to evaluate the gut microbiota (GM). Finally, molecular docking simulations were conducted to assess the interaction between seven types of CQAs from SP-8 with FXR and PPARγ. Results SP-8 significantly enhanced the health status of cholestatic mice induced by ANIT as evidenced by a notable reduction in the liver function indices and pro-inflammatory factors, restoration of liver pathological damage, and acceleration of BAs excretion through the feces. In addition, the levels of harmful secondary BAs in the liver and blood were significantly reduced by SP-8. Furthermore, the results of the study on the mechanism of action confirmed that SP-8 not only regulated FXR and PPARγ but also significantly ameliorated the GM structure, thereby promoting the enterohepatic circulation of BAs and achieving the homeostasis of the BAs in the blood and liver. In addition, SP-8 successfully reduced the inflammatory response by strongly suppressing the nuclear translocation of NF-κBp65. According to the molecular docking results, the extract's primary active ingredients could be the seven CQAs in SP-8, as they exhibited a strong affinity for both FXR and PPARγ. Finally, the Mantel test analysis revealed a significant correlation among cholestatic-associated parameters, the GM, and BAs. Conclusion It was confirmed for the first time that the SP-8 extract of Silphium perfoliatum L. that is rich in seven CQAs had a strong therapeutic effect on ANIT-induced CLD. Its mechanism may involve the regulation of the FXR signaling pathway and the amelioration of the GM structure to promote the homeostasis of BAs enterohepatic circulation. This study provides a potential candidate medicinal herb and its components for the development of CLD therapeutic drugs.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Zhijiang Sun,Dahui Wang,Nailing Sun,Fen Ran
In recent years, a range of high-performance ultrafiltration membranes have been developed, but maintaining high retention without sacrificing high throughput remains a serious challenge. In this paper, functionalized halloysite nanotubes is constructed by copolymerization and by a one-step reaction of L -arginine and dopamine hydrochloride using halloysite nanotubes as carriers. Subsequently, modified polyethersulfone membranes are prepared by blending them as additives through non-solvent-induced phase transition separation. As the synthesized nanofillers is rich in functional groups, negative electronegativity, and unique structures, the study focuses on adding nanofillers’ effect on the membrane structure and physicochemical properties. The addition of appropriate nanofillers enhances the membrane surface wettability and negative electronegativity, and the enlarged internal pores and the dense layer that remains flat and homogeneous effectively promote the flux of small molecules, the retention of large molecules, and the cyclic stability of the membrane. The prepared polyethersulfone membranes demonstrate exceptional cycle stability, high separation efficiency (almost 100 % for Congo red), and significantly improved permeation performance (initial permeate flux up to 316.5 L m -2 h −1 ). The results demonstrate the high potential of the modified prepared polyethersulfone membranes for pertinent environmental separation processes.
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Atmosphere
·
2024
·Vol. 15
·期 7
·825
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IF 2.5
Chuang Li,Yue Li,Yingsheng Liu,Shanshan Zhong,Huanshi Zhang,Zhelun Xu,Zhongyi Xu,Daolin Du,Congyan Wang
One of the key reasons for the success of invasive plants is the functional differences between invasive plants and native plants. However, atmospheric nitrogen deposition may disrupt the level of available nitrogen in soil and the functional differences between invasive plants and native plants, which may alter the colonization of invasive plants. Thus, there is a pressing necessity to examine the effects of atmospheric nitrogen deposition containing different nitrogen components on the functional differences between invasive plants and native plants. However, the progress made thus far in this field is not sufficiently detailed. This study aimed to elucidate the effects of artificially simulated nitrogen deposition containing different nitrogen components (i.e., nitrate, ammonium, urea, and mixed nitrogen) on the functional differences between the Asteraceae invasive plantBidens pilosaL. and the Asteraceae native plantPterocypsela laciniata(Houtt.) Shih. The study was conducted over a four-month period using a pot-competitive co-culture experiment. The growth performance ofP. laciniata, in particular with regard to the sunlight capture capacity (55.12% lower), plant supporting capacity (45.92% lower), leaf photosynthetic area (51.24% lower), and plant growth competitiveness (79.92% lower), may be significantly inhibited under co-cultivation condition in comparison to monoculture condition.Bidens pilosaexhibited a more pronounced competitive advantage overP. laciniata, particularly in terms of the sunlight capture capacity (129.43% higher), leaf photosynthetic capacity (40.06% higher), and enzymatic defense capacity under stress to oxidative stress (956.44% higher). The application of artificially simulated nitrogen deposition was found to facilitate the growth performance of monoculturalP. laciniata, particularly in terms of the sunlight capture capacity and leaf photosynthetic area.Bidens pilosaexhibited a more pronounced competitive advantage (the average value of the relative dominance index ofB. pilosais ≈ 0.8995) thanP. laciniataunder artificially simulated nitrogen deposition containing different nitrogen components, especially when treated with ammonium (the relative dominance index ofB. pilosais ≈ 0.9363) and mixed nitrogen (the relative dominance index ofB. pilosais ≈ 0.9328). Consequently, atmospheric nitrogen deposition, especially the increased relative proportion of ammonium in atmospheric nitrogen deposition, may facilitate the colonization ofB. pilosavia a stronger competitive advantage.
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LWT-FOOD SCIENCE AND TECHNOLOGY
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2024
·
IF 6
Huijuan Liu,Dong Xiang,Zhifei Cheng,Lin Ma,Shuyu Yang,Jiao Xie
Fresh D . rubrovolvata and P . impudicus are perishable due to their high water content and strong postharvest respiration, which seriously affect their edible value and economic benefits. Drying performs the crucial role in maintaining the quality of edible fungi and extending their shelf life, while the extraction method after drying is also important to the material composition and functional properties of edible fungi. According to the color difference and texture indicators, 45 °C was found to be the optimal temperature choice for both hot-air and vacuum drying. In addition, polysaccharide content in the extract of dried D . rubrovolvata was higher than that of P . impudicus, while the polyphenol abundance in the extract of dried P . impudicus was better than that of D . rubrovolvata. Hot water extraction or thermal ultrasonic treatment was beneficial for the antioxidant activity in D . rubrovolvata and P . impudicus extracts. Based on the correlation analysis, it was showed that polyphenols contributed significantly more to the antioxidant capacity of D . rubrovolvata and P . impudicus, especially P . impudicus, than that of polysaccharides. The related results provided new insights into the improvement of product quality and the development of functional products for D . rubrovolvata and P . impudicus.
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JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2024
·
IF 3.1
Wenchan Deng,Rongrong Huang,Yuanjiang Pan,Cuirong Sun
The metabolism process of amino acids is closely related to the growth of normal and cancer cells. It is still not clear how L/D-configuration amino acids participate in the metabolism of colorectal cell. Herein, intra- and extra-cellular metabolic distribution of L/D-amino acids in colorectal cell (HCT116) and human normal intestinal epithelial cell (NCM460) were profiled utilizing HPLC-MS/MS coupled with a chiral probe. The results displayed the differential metabolic portrayal for the two cell lines. Compared with NCM460 cell, 13 kinds of significant differential amino acids were founded in a lower concentration within HCT116 cell, and L-Gln was even not detected for intra-cell; as for extra-cell culture medium, the HCT116 cell consumed more L-Gln, D-Phe and D-Leu, while L-Met was low ingested in HCT116 cell. L-Ala and Gly were excretion in both two cell lines, excepted L-Cit which was uptake in HCT116 and excretion in NCM460 cell. Furthermore, the dynamic changes of chiral amino acids displayed that phenylalanine, tyrosine and tryptophan biosynthesis and arginine biosynthesis is the major pathway for intra-cellular metabolites and extra-cellular metabolites, respectively. Moreover, with additional D-amino acids in culture medium, the results exhibited that high concentration of D-amino acids have no significant effect on the proliferation of NCM460 cell, but could influence the profiling of amino acids metabolites, and further affect the proliferation of HCT116 cell. This present work enhances the understanding of these differential amino acids metabolic network and depicts a dynamic process of metabolic dysregulation of HCT116 and NCM460 cell.
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PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
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2024
·
IF 4.2
Yonghua Zhang,Okwong Oketch Reymick,Bin Duan,Shenghua Ding,Rongrong Wang,Nengguo Tao
The essential oil and β -cyclodextrin inclusion complex was able to inhibit the growth of Penicillium digitatum , a damaging pathogen that causes green mold in citrus fruit. In this study, cinnamaldehyde- β -cyclodextrin inclusion complex ( β -CDCA) for controlling citrus green mold was synthesized by the co-precipitation method. Characterization of β -CDCA revealed that the aromatic ring skeleton of cinnamaldehyde (CA) was successfully embedded into the cavity of β -CD to form the inclusion complex. β -CDCA inhibited P. digitatum at a minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) of 4.0 g/L. FT-IR spectroscopy analysis, calcofluor white staining, extracellular alkaline phosphatase (AKP) activity and propidium iodide (PI) staining of hyphae morphology showed that β -CDCA may damage the cell ultrastructure and membrane permeability of P. digitatum . The study further demonstrated that hydrogen peroxide (H 2 O 2 ), malondialdehyde (MDA), and reactive oxygen species (ROS) markedly accumulated in 1/2 MIC β -CDCA treated hyphae. This implied that β -CDCA inhibited growth of P. digitatum by the triggering oxidative stress, which may have caused cell death by altering cell membrane permeability. In addition, in vivo results showed that β -CDCA alone or combined with L -phenylalanine (L-PHe) displayed a comparable level to that of prochloraz. Therefore, β -CDCA combined with L-PHe can thus be used as an eco-friendly preservative for the control green mold in postharvest citrus fruit.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2017
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IF 3.154
Sihua Cheng,Xiumin Fu,Xiaoqin Wang,Yinyin Liao,Lanting Zeng,Fang Dong,Ziyin Yang
Tea (Camellia sinensis) is the most widely consumed beverage aside from water. The flavor of tea is conferred by certain metabolites, especially l-theanine, in C. sinensis. To determine why more l-theanine accumulates in C. sinensis than in other plants, we compare l-theanine contents between C. sinensis and other plant species (Camellia nitidissima, Camellia japonica, Zea mays, Arabidopsis thaliana, and Solanum lycopersicum) and use a stable isotope labeling approach to elucidate its biosynthetic route. We quantify relevant intermediates and metabolites by mass spectrometry. l-Glutamic acid, a precursor of l-theanine, is present in most plants, while ethylamine, another precursor of l-theanine, specifically accumulates in Camellia species, especially C. sinensis. Most plants contain the enzyme/gene catalyzing the conversion of ethylamine and l-glutamic acid to l-theanine. After supplementation with [2H5]ethylamine, all the plants produce [2H5]l-theanine, which suggests that ethylamine availability is the reason for the difference in l-theanine accumulation between C. sinensis and other plants.
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