JOURNAL OF CEREAL SCIENCE
·
2024
·
IF 3.9
Hui Xu,Shunqian Xu,Yang Xu,Yanjie Jiang,Ting Li,Xinxia Zhang,Jie Yang,Li Wang
This study analyzed six mutant rice samples from uniform genetic and planting backgrounds with amylose contents ranging from 4.21% to 17.52%. The physicochemical, structural and functional properties of the extracted starches were investigated and their relationships were analyzed. No significant changes were observed in the morphology, granule size, amylopectin chain-length distribution, and crystalline type of rice starches . The average hydrodynamic radius (R h ), relative crystallinity (RC), the ratio of 1045 cm −1 /1022 cm −1 (R 1045/1022 ), and lamellar peak intensity (I max ) were significantly correlated with amylose content, impacting the digestion properties. A higher degree of order in starch structure was found to impede its digestion progress by affecting its physicochemical characteristics. The decreased onset temperature and increased gelatinization temperature range indicated increased crystalline structure instability, decreasing peak time and pasting temperature. Furthermore, there were notable reductions in starch digestion rate ( k ) and rapidly digestible starch content (RDS) as amylose content increased, despite no significant change in the final digestion percentage. The k exhibited a positive correlation with R h , while there was a positive association between RC, R 1045/1022 , and I max with RDS. These findings can provide valuable guidance for rice breeders in developing rice varieties with specific functional attributes.
研究领域:
食品科学
·
植物学
·
遗传学
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DOI
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2026
·
IF 2.5
Ziyue Chen,Jie Chen,Zhaoyi Li,Shu Guo,Rukang Li
A new neodymium-niobium-tellurite compound, NdNbTe 2 O 8 , was successfully obtained through high-temperature solution method. NdNbTe 2 O 8 crystallized in the centrosymmetric space group P 2 1 / c with unit cell parameters of a = 5.6146(6) Å, b = 21.936(2) Å, c = 8.0905(6) Å, β = 136.09°, and Z = 4. Its structure is composed of two alternately arranged layers consisting of NbO 6 octahedra and NdO 8 polyhedra, with TeO 3 trigonal pyramids linked the layers to form a 3-dimensional framework. This particular structural feature has been discovered in a series of recent found new compounds with similar compositions of RMQ 2 O 8 (R = Y, La, Nd; M = V, Nb; Q=Se, Te) including the noncentrosymmetric LaNbTe 2 O 8 with favorable nonlinear optical properties. The structural evolution, crystal growth, thermal analysis and optical spectrum of the title compound are also presented.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jianghui Zheng,Cuicui Fang,Mengyu Tao,Bingyong Lin,Yueliang Wang,Yuanyuan Yao,Lifen Chen,Hong Huang,Jianguo Xu,Longhua Guo
Dual-signal cross-validation enhances the reliability of quantitative measurements. However, asynchronous dual signals generated from different incident light affect the acquisition time and reliability of quantitative detection. In this work, we proposed an immunochromatography (ICA) sensor that utilizes synchronized Surface-Enhanced Raman Scattering (SERS) and temperature dual signals generated from the same incident light for analyzing microcystin-LR (MC-LR) in aquatic products. Quantitative analysis reveals a good linear correlation between the dual signals and the logarithmic concentration of MC-LR over the range of 0.001000–80.00 ng/mL. Moreover, the proposed method demonstrated excellent recovery rates and the results were similar with enzyme-linked immunosorbent assay, but the signal acquisition time (3 s) and overall detection time (10 mins) of our approach were significantly reduced. Therefore, a synchronized dual signals ICA sensor that combines SERS and photothermal technology was constructed for direct, rapid, and reliable detection of MC-LR, providing a promising application for field-based monitoring.
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高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Yuanjiao Liu,Yi Wang,Songyao Zhang,Hengqi Zou,Xinrui Miao,Wenli Deng
The self-assembly of two kinds of C2-symmetric aromatic carboxylic acids named 4,4′,4″,4‴-(1,4-phenylenebis(azanetriyl))tetrabenzoic acid (H4PTA) and 5′,5″-bis(4-carboxyphenyl)-[1,1′:3′,1″:3″,1‴-quaterphenyl]-4,4‴-dicarboxylic acid (H4QDA) and the coadsorption with coronene (COR) molecules at different solution concentrations were investigated at the heptanoic acid (HA)/highly oriented pyrolytic graphite (HOPG) interface by scanning tunneling microscopy (STM). H4PTA molecules with nonplanar conformation self-assembled into a highly ordered rhombus structure at variational concentrations and subsequently could be regulated into a Kagomé network by the coadsorption of COR molecules. H4QDA molecules with planar conformation self-assembled into two various nanostructures (rhombus structure and Kagomé network) coexisting on the HOPG surface at different concentrations. The Kagomé architecture of H4QDA could act as a rigid host template to trap the COR molecules. Meanwhile, COR exhibited preferential adsorption in the porous template: COR only entered the hexagonal cavities at low concentrations and filled in all hexagonal and triangular cavities at high concentrations. Density functional theory (DFT) calculations and molecular dynamics (MD) simulations showed that the host–guest co-assembled structures were more thermodynamically and kinetically stable. The formation of different self-assembly and co-assembly processes of two molecules could be attributed to the dissimilar molecular conformation. Our work is of significance to further explore the formation mechanism of two-dimensional (2D) porous arrangements and provides an ideal way to regulate the adsorption of porous templates.
研究领域:
材料科学
·
表面科学
·
计算化学
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DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Wanjun Ma,Yali Shi,Gaozhong Yang,Jiang Shi,Junpeng Ji,Yue Zhang,Jiatong Wang,Qunhua Peng,Zhi Lin,Haipeng Lv
In order to investigate the hypolipidaemic and antioxidant effects of various dark teas produced from different post-fermentation using the same raw material, a hyperlipidaemia zebrafish model combined with binding bile salts assay and antioxidant assays were performed in this study. Results showed that the hypolipidaemic effect of dark tea extracts increased significantly ( p < 0.05) while the antioxidant ability decreased sharply compared with raw material. Particularly, Liupao tea (50%) and Pu-erh tea (48%) showed promising hypolipidaemic potential; however, the antioxidant capacity of Pu-erh tea decreased (31–49%) most dramatically. Besides, the levels of total polyphenols and catechins decreased sharply, but theabrownin, gallic acid, and caffeine increased significantly after post-fermentation. Moreover, the potential mechanisms of regulating hyperlipidaemia by dark tea extracts were discussed. These results suggest that microbial fermentation significantly affects the bioactivity of dark teas, and provide theoretical basis for processing and improving of dark tea products for hyperlipidaemia therapy.
研究领域:
营养学
·
生物化学
·
食品科学
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DOI
高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Jia-Hao Gao,Pei-Pei Huang,Jie Liu,Nan Zheng,Dong Wang,Si-Yu Yue,Er-Nu Liu,Quan Liu,Bo Liu,Jiu-Fu Lu
Three new metal coordination polymers with different spatial structure, namely {[Co 2 (H 2 O) 6 (4-PDCA) 2 ] 2 ·3H 2 O} n ( SNUT-12 ), {[Cd(H 2 O) 2 (4-PDCA)]·2H 2 O} n ( SNUT-13 ) and [Zn 2 (4-PDCA) 2 ] n ( SNUT-14 ), where H 2 (4-PDCA) = 1-(4-carboxyphenyl)-5-methyl-4-oxo-1,4-dihydropyridazine-3-carboxylic acid, were synthesized by changing the central ion with the same ligand under solvothermal and hydrothermal conditions, which were further characterized by single crystal X-ray diffraction, powder XRD, FT-IR and TGA . Single crystal X-ray analysis revealed that SNUT-12 exhibits a 1D infinite zigzag chains which were constructed by Cobalt(II) ion and 4-PDCA 2− ligand, SNUT-13 features a 2D ladder-like structure. Meanwhile, SNUT-14 displays 2-fold 3D → 3D parallel interpenetrating frameworks. In addition, SNUT-12 exhibited high electrocatalytic oxygen evolution reaction, and SNUT-13, SNUT-14 showed strong fluorescence at room temperature .
研究领域:
化学
·
材料科学
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DOI
高影响因子
Polymer Chemistry
·
2022
·Vol. 13
·期 11
·1520-1536
·
IF 5.364
Jian Sun,Yu-Lin Hong,Chang Wang,Zhi-Wei Tan,Cheng-Mei Liu
This paper reports the synthesis and selective polymerisations of an epoxy-rich phosphine oxide-containing styrenic monomer, namely 4-vinylbenzyl-bis((oxiran-2-ylmethoxy)methyl) phosphine oxide (VBzBOPO). The styryl and epoxy functionalities could be polymerized independently through free radical polymerisation or polycondensation without interference between the processes, and both resulted in reactive polymers with a high density of functional groups. In particular, reversible addition–fragmentation chain transfer polymerisation (RAFT) of VBzBOPO led to polyVBzBOPO with controlled molecular weights and narrow polydispersity (Đ = 1.13–1.23). Due to its high density of epoxy groups, polyVBzBOPO served as a precursor to a family of functionalized polymers, which were formed with a range of chemical reactions (post-polymerisation modifications) using various reagents (such as water, diethylamine, n-butanethiol and so on). Alternatively, the ring-opening polycondensation of VBzBOPO with difunctional monomers occurred via epoxy-thiol, epoxy-amine or epoxy-acid reactions that proceeded under mild conditions, and these furnished linear polymers with styryl and hydroxyl groups along the polymer chain. These polymers underwent self-crosslinking reactions at 60 °C under vacuum without any initiators, and this resulted from thermally initiated polymerisation of styrene. The water-uptake capacities of these cross-linked polymers were adjusted by changing the pH or adding a certain amount of H2O2. All the polymers were characterized in detail by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR) spectroscopy and size exclusion chromatography (SEC).
研究领域:
高分子化学
·
材料科学
·
有机化学
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DOI
高影响因子
TALANTA
·
2026
·
IF 6.7
Haoran Li,Shijun Xiong,Beibei Chen,Zhekuan Wu,Zhen Zhou,Yong Liang,Man He,Bin Hu
Amadori and Heyns compounds are key Maillard reaction intermediates, resulting from the reaction of a certain amino acid with glucose (Glu) or fructose (Fru), respectively. They play a dual role in augmenting cigarette aroma and attenuating sensory irritation, and their quantification in tobacco is vital for tobacco quality evaluation and Maillard reaction mechanism study. Currently, simultaneous quantification of Amadori and Heyns compounds derived from the same amino acid, which present as isomers, is encumbered by poor chromatographic separation, and reliance on unavailable specific fragment ions. Herein, a method based on high performance liquid chromatography combined with tandem mass spectrometry (HPLC-MS/MS) detection was developed for the simultaneous quantification of Amadori and Heyns compounds derived from the same three amino acid (alanine, proline, phenylalanine, abbreviated as Ala, Pro, and Phe, respectively) with an ion ratio strategy. Under the optimized conditions, the limits of detection ranging from 2.22 to 6.94 ng/mL were obtained for six target analytes (Fru-Phe/Glu-Phe, Fru-Pro/Glu-Pro, Fru-Ala/Glu-Ala). When the method was applied to tobacco leaf powder extracts, target Amadori and Heyns compounds were found in the range of 0.65-56.4 μg/g, with Heyns compounds consistently less abundant than Amadori counterparts. In the recovery test, target analytes showed recoveries of 76.8-111%. Compared with reported methods, the proposed method features universal applicability without requiring characteristic fragment ions or chromatographic separation. It provides a reliable tool for analyzing hard-to-separate sugar-derived Maillard intermediates in tobacco.
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高影响因子
ANALYST
·
2019
·Vol. 144
·期 23
·6989-7000
·
IF 4.019
Alula Yohannes,Shun Yao
The application of ionic liquids (ILs) for the separation of bioactive compounds from various sample matrices is a burgeoning area. Here, a class of porous materials called metal–organic frameworks (MOFs) were combined with tropine-based ILs having structural similarity with natural tropane alkaloids for the quantitative analysis of Huashansheng tablets. Three MOFs (MIL-101, HKUST-1 and ZIF-8) were used to form the composite with the a tropine-based IL (N-propyl-substituted tropine hexafluorophosphate, [C3tr][PF6]), using the ship-in-a-bottle (SIB) synthesis approach. The performance of the hybrid IL/MOF composite (IL@MOF) was evaluated as a potential sorbent for application in the dispersive solid-phase-extraction-based enrichment of tropane alkaloids, followed by chromatographic analysis. It was found that [C3tr][PF6]@MIL-101 exhibited excellent adsorption capacity, and the extraction results showed satisfactory recoveries in the range of 91.5–104.7% (RSD < 5%). Further, the limit of detection went down to 10–20 μg L−1 with a linear range from 100–500 μg L−1, which proved that an adsorbent with the same nucleus as the target objects would be more suitable and efficient for their later extraction.
研究领域:
分析化学
·
药物分析
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2020
·
IF 4.335
Ling Tang,Qin Yang,Jianfang Zhang,Guisheng Deng
A regioselective reverse strategy for the construction of eight-membered sulfur-containing heterocycle-fused γ-pyrones and 2-(1,4-dithianyl)-4-pyrones starting from 2-diazo-γ-pyrones and dithioacetals was achieved for the first time. The process combines C–S bond formation via sulfur ylides and C–C bond formation via electron transfer to afford the target molecules in a facile manner with 100% regioselectivity and in excellent isolated yields (up to 90%).
研究领域:
有机化学
·
合成化学
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DOI
高影响因子
Energy & Environmental Materials
·
2021
·Vol. 6
·期 2
·e12336
·
IF 15.122
Yaqing Wei,Jun He,Jie Zhang,Mingyang Ou,Yanpeng Guo,Jiajun Chen,Cheng Zeng,Jia Xu,Jiantao Han,Tianyou Zhai,Huiqiao Li
Among the alloying-type anodes, elemental Sb possesses the suitable yet safe plateau, simple lithiation pathway, small voltage polarization, high conductivity, and superior cycle stability. However, challenge is that its intrinsic capacity is rather low (660 mAh g −1 ), <1/6 of silicon. Herein, we propose a seamless integration strategy by merging the voltage and capacity of phosphorus and antimony into a solid solution alloy. Interestingly, the enlistment of P is found greatly enlarge the capacity from 660 to 993 mAh g −1 for such Sb 30 P 30 solid solution, while maintaining a single and stable discharge plateau (~0.79 V) similar to elemental Sb. Various experimental characterizations including XPS, PDF, Raman, and EDS mapping reveal that in such a material the P and Sb atoms have interacted with each other to form a homogenous solid solution alloy, rather than a simple mixing of the two substances. Thus, the Sb 30 P 30 exhibits superior rate performances (807 mAh g −1 at 5000 mA g −1 ) and cyclability (821 mAh g −1 remained after 300 cycles). Furthermore, such Sb 60-x P x alloys can even deliver 621 mAh g −1 at −30°C, which can be served as the alternative anode materials for high-energy and low-temperature batteries. This unique seamless integration strategy based on solid solution chemistry can be easily leveraged to manipulate the capacity of other electrode materials at similar voltage.
研究领域:
材料科学
·
电化学
·
电池技术
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DOI
高影响因子
Nanoscale
·
2022
·Vol. 15
·期 3
·1210-1220
·
IF 8.307
Shiang Li,Chao Feng,Yuehong Xie,Changyan Guo,Afaq Hassan,Jide Wang
The development of low-cost, long-term stability, and good oxygen reversible catalytic reaction (ORR/OER) and hydrogen evolution (HER) activity under the same electrolyte concentration of electrocatalytic materials has an important role in the construction of large-scale applications and more valuable sustainable energy systems. Among them, the representative CoMn–Nx@N–C-900-0.2 showed good ORR/OER/HER catalytic activity in 0.1 M KOH alkaline electrolyte, specifically manifested by its half-wave potential E = 0.84 V in the ORR test, which was better than that of commercial Pt/C. The total oxygen electrode activity index of OER/ORR was E = 0.79 V, and it also showed good HER performance. When the current density was 10 mA cm−2, the operating potential was E = −0.266 V. The synergistic effects of the CoMn bimetallic alloy, tubular layered porous structure, which exposed more active area and various nitrogen species such as CoMn–Nx, were the main reasons for the improvement of the trifunctional catalytic performance of electrocatalytic materials. The synthesis strategy and analysis of the electrocatalyst performance provide a new reference for the development of multifunctional materials with high catalytic performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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