Nanomaterials
·
2022
·Vol. 12
·期 4
·624
·
IF 5.719
Yanjun Zhang,Yaxin Zhao,Rui Guo,Zengxing Zhang,Dan Liu,Chenyang Xue
Currently, there are several thermoelectric materials, such as Ag2Te, Bi2Te3, and Sb2Te3, that have been investigated for thermoelectric applications. However, the toxicity and rarity of most of these materials make them unsuitable for practical applications. In contrast, silver selenide (Ag2Se) is an abundant and environment-friendly thermoelectric material. This study provides a facile synthetic approach for preparing high-performance, low-cost, and flexible Ag2Se thermoelectric films. Ag2Se nanomaterials were prepared based on the chemical template method, and the reaction solution concentration was varied to systematically investigate the effects of reaction solution concentration on the characterization and thermoelectric properties of Ag2Se nanomaterials. For convenience of testing, the flexible Ag2Se films were prepared on porous nylon membranes using vacuum-assisted filtration. The prepared thermoelectric films were tested using an X-ray diffractometer, scanning electron microscope, Seebeck coefficient tester, and Hall tester. The film prepared from the solution with the lowest concentration (18.0 mM) demonstrated the best thermoelectric performance, with a maximum power factor of 382.18 μW∙m−1∙K−2at ~400 K. Additionally, a cold-pressing treatment could effectively enhance the electrical conductivity of the film, without damaging the substrate, as the conductivity of the film remained at 90% of the original value after 1500 bending cycles.Keywords:silver selenide;vacuum-assisted filtration;flexible film;thermoelectric properties
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2022
·
IF 4.52
Junyao Li,Changhong Hao,Huiyan Jia,Jing Zhang,Huiting Wu,Jingming Ning,Rangjian Wang,Wei-Wei Deng
Jinmudan (JMD) black tea is processed from the JMD cultivar ( Camellia sinensis (L.) O. Kuntze cv. Jinmudan). Dried JMD black tea (JMD-D) received a score of 7.43 in the quantitative descriptive analysis, indicating that it had the strongest fruity flavor. Many volatile compounds (129) were identified by solvent assisted flavor evaporation and gas chromatograph mass spectrometry. In total, 26 aroma active compounds, including ( Z )-methyl epi-jasmonate (flavour dilution factor (FD): 128–1024), benzeneacetaldehyde (FD: 512–1024), linalool (FD: 256–1024), geraniol (FD: 256–512), jasmine lactone (FD: 64–1024), were identified in JMD-D and controls through an aroma extract dilution analysis and gas chromatography-mass spectrometry olfactometry. On the basis of the FD values, odor activity values, and relative quantification results, the volatiles of fruit flavor derived from lipids, such as jasmine lactone, were prominent in JMD-D compared to the controls. During the processing of the four types of black tea, the volatile fraction concentration increased mainly from the fresh leaf to the fermentation stage and decreased in the drying stage.
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 2
·210
·
IF 2.67
Xingyuan Diao,Xiaonan Chen,Shihao Deng,Hongwei Bai
Stereocomplex-type polylactide (SC-PLA) created by alternate packing of poly(L-lactide) (PLLA) and poly(D-lactide) (PDLA) chains in a crystalline state has emerged as a growingly popular engineering bioplastic that possesses excellent hydrolytic stability and thermomechanical properties. However, it is extremely difficult to acquire high-performance SC-PLA products via melt-processing of high-molecular-weight PLLA/PDLA blends because both SC crystallites and homocrystallites (HCs) are competitively formed in the melt-crystallization. Herein, a facile yet powerful way was employed to boost SC formation by introducing trace amounts of some epoxy-functionalized small-molecule modifiers into the enantiomeric blends during reactive melt-blending. The results show that the SC formation is considerably enhanced with the in situ generation of multi-arm stereo-block PLA copolymers, based on the reaction between epoxy groups of the modifiers and hydroxyl end groups of PLAs. More impressively, it is intriguing to find that the introduction of only 0.5 wt% modifiers can induce exclusive SC formation in the blends upon isothermal and non-isothermal melt-crystallizations. The outstanding SC crystallizability might be attributed to the suppressing effect of such unique copolymers on the separation of the alternately arranged PLLA/PDLA chain segments in molten state as a compatibilizer. Furthermore, the generation of these copolymers does not result in a significant increase in melt viscosity of the blends. These findings suggest new opportunities for the high-throughput processing of SC-PLA materials into useful products.Keywords:polylactide;stereocomplex;crystallization;copolymer;compatibilization
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Ruimin Wang,Lu Wang,Lin Zhang,Sitong Wan,Congfa Li,Sixin Liu
This study focused on the relationship between content levels of phytochemicals and the biological activities of noni ( Morinda Citrifolia L.) fruit extracts (NFEs) prepared with traditional solvents and deep eutectic solvents (DESs). The results indicated the total phenolic content in Bet-Gly (Betaine: Glycerol) extracts (11.89 mg GAE/g DW) and total iridoid content in 70% ethanol extracts (26.38 mg CE/g DW) were the highest. A total of 17 compounds were identified and quantified in NFEs. Traditional solvent extracts, except ethyl acetate, exhibited higher antioxidant activities than DESs. Three DES extracts showed higher activities against pancreatic lipase than traditional solvent extracts. Multivariate analysis revealed that the type of extraction solvent exerts a significant influence on the phytochemical compositions and biological activities of NFEs. This study provided valuable information on the efficient extraction of phytochemicals from noni fruits and DESs are promising green solvent for the extraction of bioactive compounds from noni fruits.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 6
·1-13
·
IF 2.8
Zou Yulong,He Qiaobai,Wang Shanrong,Zou Fang,Lu Xili,Sun Zhijie,Li Li
Poly(L-lactide-co-ε-caprolactone) (PLCL) nanocomposites reinforced with graphene oxide modified by poly (L-lactic acid) (g-GO) were prepared by solution casting, where the graft ratio of PLLA to GO is about 11.7%. The results show that the g-GO possesses improved dispersion and interface interactions with the PLCL matrix, therefore, the final mechanical properties of nanocomposites are enhanced. Comparing with neat PLCL, the tensile strength and elongation at break of (1wt%)g-GO/PLCL are increased by 86.4% and 82.4%, respectively. Moreover, the g-GO/PLCL nanocomposite containing 1 wt% g-GO exhibits excellent thermal- induced and NIR light-induced shape memory effects and the shape recovery ratio is all up to 95%. The nanocomposites also have favorable antibacterial properties. The g-GO/PLCL nanocomposites with good NIR light-induced shape memory effect, antibacterial properties, biodegradability and biocompatibility have great potential for minimally invasive surgery.
✓ 已验证
产品关联
DOI
高影响因子
Plants-Basel
·
2023
·Vol. 12
·期 22
·3810
·
IF 4.5
Qiang Wang,Xijie Zhou,Shengli He,Wenguo Wang,Danwei Ma,Yu Wang,Hong Zhang
Chenopodium ambrosioidesL. is an invasive plant native to the Neotropics that has seriously threatened the ecological security of China, and allelopathy is one of the mechanisms underlying its successful invasion. Maize (Zea maysL.) and soybean (Glycine max(L.) Merr.), as the main food crops, are usually affected byC. ambrosioidesin their planting areas. The purpose of this study was to investigate the ultrastructure, autophagy, and release-related gene expression of receptor plant root border cells (RBCs) after exposure to volatile oil fromC. ambrosioidesand its main component α-terpene, which were studied using maize and soybean as receptor plants. The volatiles inhibited root growth and promoted a brief increase in the number of RBCs. As the volatile concentration increased, the organelles in RBCs were gradually destroyed, and intracellular autophagosomes were produced and continuously increased in number. Transcriptomic analysis revealed that genes involved in the synthesis of the plasma membrane and cell wall components in receptor root cells were significantly up-regulated, particularly those related to cell wall polysaccharide synthesis. Meanwhile, polygalacturonase and pectin methylesterases (PME) exhibited up-regulated expression, and PME activity also increased. The contribution of α-terpene to this allelopathic effect ofC. ambrosioidesvolatile oil exceeded 70%. Based on these results, receptor plant root tips may increase the synthesis of cell wall substances while degrading the intercellular layer, accelerating the generation and release of RBCs. Meanwhile, their cells survived through autophagy of RBCs, indicating the key role of RBCs in alleviating allelopathic stress fromC. ambrosioidesvolatiles.Keywords:Chenopodium ambrosioidesL.;allelopathic stress;root border cells;release;autophagy
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Cijun Shuai,Xiuwen Gao,Yifeng Wang,Hongyi Qian,Wei Li,Shuling Liu,Huarui Zhou,Shuping Peng,Fangwei Qi
Bismuth sulfide (Bi2S3) could respond to near-infrared light to generate photocurrent, demonstrating tremendous potential in constructing self-powered electrical stimulation to accelerate bone regeneration. Nevertheless, the facile recombination of electron–hole pairs undermined its photoelectric performance. Herein, a sea-buckthorn-like nanostructured Bi2S3–BaTiO3 was synthesized by loading BaTiO3 nanoparticles onto Bi2S3 nanorods through a self-assembly method and then integrated into poly-L-lactic acid (PLLA) powders to fabricate PLLA/Bi2S3–BaTiO3 scaffolds. Piezoelectric BaTiO3 would deform under stress to produce instantaneous polarization, which triggered positive and negative charges presented on the relative surfaces of BaTiO3. Thus, the photogenerated electrons and holes of Bi2S3 would be, respectively, transferred to the positive and negative charged surfaces of BaTiO3, thereby achieving the electron–hole separation. Results revealed that under ultrasonic irradiation, the photoluminescence peak intensity of Bi2S3–BaTiO3 was significantly reduced compared with that of Bi2S3, confirming the improved electron–hole pair separation. Accordingly, the photocurrent of Bi2S3–BaTiO3 was increased by approximately 1.4 times in comparison with that of Bi2S3. The enhanced photocurrent effectively promoted cell proliferation and differentiation by upregulating alkaline phosphatase expression, enhancing calcium nodule deposition, and promoting cellular Ca2+ influx. Consequently, this work provided a perspective for establishing a self-powered electrical stimulated scaffold for bone repair.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Yuxia Yang,Jinxi Cui,Zhongli Jiang,Xiuhong Zhao
GC × GC-ToF-MS is increasingly used to analyze complex food flavors due to its high resolution and sensitivity, but few studies have used the method to identify aroma components of bread. For the first time, this study combines GC × GC-ToF-MS and multivariate statistical methods to explore the effects of L. paracasei fermentation on bread flavor characteristics. A total of 1534 volatile organic compounds were identified, of which 447 were obtained by metabolome normalization. Based on the variable importance for the projection and p values, 82 different compounds were screened in L. paracasei bread compared with yeast bread, and the total relative content was 1.52 times higher than that of yeast bread. 2-Furancarboxaldehyde, 5-methyl-, pentanoic acid, 2-hydroxy-4-methyl-, ethyl ester, pyrazine, 2,5-dimethyl- and γ-terpinene are aroma-presenting substances specific to L. paracasei bread that could be potential identification compounds. This study provides a new techno-theoretical approach for the characterization and discrimination of LAB bread flavors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Yongkang Ye,Wuwen Yan,Tingting Wang,Chenlu Zhang,Kaicheng Wang,Yuexi Lu,Haisong Zheng,Yunlai Tao,Xiaodong Cao,Shudong He,Yunfei Li
Simultaneous detection of multiple foodborne pathogens is of great importance for ensuring food safety. Herein, we present a sensitive dual-channel electrochemical biosensor based on copper metal organic frameworks (CuMOF) and lead metal organic framework (PbMOF) for simultaneous detection of Salmonella typhimurium ( S. typhimurium ) and Listeria monocytogenes ( L. monocytogenes ). The MOF-based nanotags were prepared by functionalizing gold nanoparticles loaded CuMOF (Au@CuMOF) and PbMOF (Au@PbMOF) with signal DNA sequences 1 (sDNA1) and sDNA2, respectively. By selecting invA of S. typhimurium and inlA gene of L. monocytogenes as targe sequences, a sandwich-typed dual-channel biosensor was developed on glassy carbon electrodes (GCE) through hybridization reactions. The sensitive detection of S. typhimurium and L. monocytogenes was achieved by the direct differential pulse voltametric (DPV) signals of Cu 2+ and Pb 2+ . Under optimal conditions, channel 1 of the biosensor showed linear range for invA gene of S. typhimurium in 1 × 10 −14 −1 × 10 −8 M with low detection limit (LOD) of 3.42 × 10 −16 M ( S/N = 3), and channel 2 of the biosensor showed linear range for inlA gene of L. monocytogenes in 1 × 10 −13 −1 × 10 −8 M with LOD of 6.11 × 10 −15 M (S/N = 3). The dual-channel biosensor showed good selectivity which were used to detect S. typhimurium with linear range of 5−1.0 × 10 4 CFU mL −1 (LOD of 2.33 CFU mL −1 ), and L. monocytogenes with linear range of 10 − 1.0 × 10 4 CFU mL −1 (LOD of 6.61 CFU mL −1 ).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2023
·
IF 6
Wangyan Qin,Ying Wang,Fall Mouhamed,Bruce Hamaker,Genyi Zhang
The impact of the solubility of phenolic compounds (PCs) from highland barley (HB) on their antioxidant property and protein binding affinity was investigated. HB-PCs from the phenolic extract (HBE) were analyzed through the UPLC-QTOF-MS, and five fractions were further divided based on their water solubility. Representative compounds of proanthocyanidins, (+)-catechins, and (−)-epicatechin from water fraction (HB–W, 197.67 ± 4.8 μmol GAE/100 g) were significantly correlated with the antioxidant activity of the HBE. In contrast, the PCs enriched in the acetone fraction (HB-A, 60.2 ± 3.1 μmol GAE/100 g) with a structure of 2-phenyl chromogen ketone group (such as rutin, kaempferol, hesperidin, and quercetin) were positively correlated with the protein binding affinity. Further analysis showed that the water-insoluble HB-A fraction significantly lowered the starch digestibility (37.5%) and postprandial glycemia (17.8%) compared to HB-W fractions. Thus, the solubility of PCs is intimately associated with their biological functions as antioxidants or protein-binding ligands, indicating PCs with strong antioxidant properties or high protein binding affinity are structurally distinct from each other, and the physical properties of phenolic compounds might be an important factor to further the understanding of their health functions and mechanisms.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Zidan Luo,Mengfei Tian,Naveed Ahmad,Yuxin Xie,Chunguo Xu,Jie Liu,Chunjian Zhao,Chunying Li
Chlorogenic acid (CGA), known as an important natural antioxidative compound in Ficus carica L, has valuable application prospects on health food, functional food, nutrition and dietary formulations. In this study, a surface multiple imprinting layers membrane (SMILM) was developed and applied to separate CGA from F. carica . Two different imprinting layers were integrated onto the membrane surface in sequence. The first imprinting layer was formed by dopamine polymerization and the second imprinting layer was fabricated by atom transfer radical polymerization (ATRP) and boronate affinity. The prepared SMILM with well-oriented multiple recognition sites exhibited high adsorption capacity (52.08 mg·g −1 in 60 min) for CGA and specific selectivity with imprinting factor ( IF ) of 3.06. Furthermore, the recognition mechanism of SMILM was clarified by molecular simulation and NMR. The SMILM was successfully applied to separate CGA from the fruits, peels and leaves of F. carica with recoveries of 90.22, 83.31 and 84.95 %, respectively.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PLANT PHYSIOLOGY
·
2023
·
IF 4.3
Qinyong Dong,Dong Li,Yangliu Wu,Chunran Zhou,Yongxi Lin,Peijuan Miao,Jiaqi Li,Canping Pan
Few studies have been conducted to investigate the impact of pesticides on the secondary metabolism of traditional Chinese medicine and strategies to mitigate the toxicity of pesticide-induced oxidative stress. The current study focuses on evaluating the potential impacts of nano selenium (NSe) and imidacloprid (IMI) on the quality, physiological biochemistry, and secondary metabolites in Perilla frutescens (L.) Britt . ( P. frutescens ). The study utilized metabolome analysis to explore the toxicity mechanism of IMI. The study noted that IMI-induced stress could emerge with detrimental effects by targeting the destruction of the phenylpropanoid biosynthesis pathway. IMI-induced phenylpropanoid metabolism disorder resulted in an 8%, 17%, 25%, 10%, 65%, and 29% reduction in phenylalanine, coniferyl aldehyde, ferulic acid, cafestol, p-coumaraldehyde, and p-coumaric acid levels, respectively. Under the treatment of exogenous NSe, the levels of these metabolites were increased by 16%, 32%, 22%, 22%, 92%, and 29%, respectively. The application of exogenous NSe increased the levels of these metabolites and improved the biochemical disorder and quality of P. frutescens leaves by optimizing the phenylpropanoid metabolic pathway and enhancing the antioxidant system. Overall, the results suggest that foliar application of NSe could alleviate the oxidative stress toxicity induced by IMI and improve the quality of P. frutescens .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）