Microorganisms
·
2025
·Vol. 13
·期 9
·2088
·
IF 4.2
Yingchao Sun,Yuxin Chai,Shuangming Li,Yongcheng Chen,Chunhui Ma,Rongzheng Huang,Fanfan Zhang
Background: Nettle is a potential non-conventional feed resource due to its high level of crude protein content, and ensiling is better for utilization in the animal industry. Previous integrated analysis (microbiome and metabolome) suggested that 4-pentenoic acid and malic acid in ensiled nettle may inhibit harmful microorganisms within the system. The present study investigated the effects of these two acids on nettle silage quality through the addition of 1% fresh weight of these acids, then analyzed the characteristics and bacterial communities during 60 days of nettle ensiling. Results: The addition of 4-pentenoic acid increased the content of crude protein (CP) and acetic acid (AA) compared with both control and malic acid-treated groups during 30 to 60 days of ensiling (p< 0.05). Lactic acid (LA) content was highest in the malic acid-treated group (4.21%, dry matter, DM based) compared to the control and 4-pentenoic acid-treated groups after 7 days of nettle ensiling (p< 0.05), but lower compared with the 4-pentenoic acid-treated group after 30 days of nettle ensiling (p< 0.05), and it was not detected in all groups after 60 days of silage. The contents of butyric acid (BA) and ammonia (AN) were the lowest (2.92–4.39% of DM and 9.94–24.28% of total nitrogen, respectively) in the 4-pentenoic-treated group compared with both control and malic acid-treated groups during 30 to 60 days of ensiling (p< 0.05). Both acids increased the relative abundance ofWeissellaafter 30 days of nettle ensiling, with 4-pentenoic acid showing a higher inhibitory capacity. Both acids showed a trend to inhibit the relative abundance ofClostridium sensu stricto 15after 30 days of nettle ensiling.Clostridium sensu stricto 15showed significant positive correlation with BA and AN (p< 0.05). Conclusions: The results of the present study suggested that the addition of 4-pentenoic could improve the quality of silage by reducing levels of protein degradation, probably resulting from its inhibited activity againstClostridiumspp. However, malic acid was less effective than 4-pentenoic acid in suppressingClostridiumspp. activity and the associated production of BA and AN, resulting in inferior preservation of CP.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Tianying Peng,Wenyong Mei,Jin Zhang,Saiwen Liu
4-Aminophenol (4-AP), a crucial organic intermediate in the synthesis of acetaminophen, poses significant toxicity and potential environmental and health risks. Titanium dioxide@ titanium-based metal–organic frameworks (TiO2@Ti-MOFs) form a three-dimensional heterogeneous composite structure by covalently binding to the surface of 2D transition metal carbides and nitrides (MXenes). The synergistic effect between the porosity of titanium-based metal–organic frameworks (Ti-MOFs) and the layered structure of MXenes provides abundant adsorption sites, effectively enriching the target molecule 4-AP and enhancing the sensor's selectivity. The high conductivity of MXenes, combined with the semiconductor properties of TiO2@Ti-MOFs, accelerates electron transfer on the electrode surface, resulting in an increased response current and improved sensitivity and detection range. The detection range of the TiO2@Ti-MOF/MXene electrochemical sensor spans from 0.5 to 50 μM, with a detection limit of 0.16 μM. This sensor is effectively applicable for detecting 4-AP in real water samples, such as tap water and Qingshan Lake water, demonstrating satisfactory recovery.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Lijun Wang,Aiying Hou,Min Wang,Armando A. Paneque Quevedo,Qiaoli Yue
In this study, blue-fluorescent black phosphorus quantum dots (BPQDs) were synthesized through a combination of liquid-phase ultrasonication and solvothermal techniques. Black phosphorus (BP) crystal powder, isopropyl alcohol (IPA) and NaOH were employed as precursor, solvent, and to adjust the reaction environment, respectively. BPQDs exhibited optimal fluorescence characteristics, with excitation and emission wavelengths measured at 322 and 392 nm, respectively. Notably, 4-nitrophenol (4-NP) induced static fluorescence quenching of BPQDs, causing a reduction in their quantum yield from 7.8% to 4.4%. A linear correlation was observed between the fluorescence quenching intensity and 4-NP concentration, spanning a range from 0.1 µM to 120 µM, with a limit of detection as low as 43 nM. Furthermore, a portable test strip was developed, which undergoes a color change to yellow upon exposure to 4-NP, enabling selective detection. By analyzing the color of the strip through smartphone photography to obtain red, green and blue (RGB) values, a linear relationship was established between R/B ratio and 4-NP concentration within the range of 10-150 µM, facilitating quantitative analysis. This study demonstrates the effectiveness of BPQDs-based fluorescent probes and portable test strips for the detection of 4-NP in various water samples, including lake water, tap water and laboratory waste effluent.
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高影响因子
Inorganic Chemistry Frontiers
·
2017
·Vol. 4
·期 7
·1100-1107
·
IF 4.036
Yanna Chen,Donghai An,Min Zhang,Cong Hu,Miriding Mutailipu,Zhihua Yang,Xiaoquan Lu,Shilie Pan
A new lithium zincoborate Li6Zn3(BO3)4 has been successfully prepared via a high-temperature solution method. Li6Zn3(BO3)4 is composed of LiO4 and ZnO4 tetrahedra, and nearly coplanar BO3 units. A face-sharing LiO4 configuration was found in the title compound, and a comparison of Li–O configurations was systemically investigated for all Li-containing borates. Interestingly, Li6Zn3(BO3)4 has two reversible phase transitions at about 341 and 706 °C, which implies that Li6Zn3(BO3)4 is a potential candidate as a phase change material. In situ high-temperature X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analysis were used to verify the two reversible phase transitions. The linear optical properties were researched in detail using ab initio density functional theory (DFT).
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高影响因子
INTEGRATED FERROELECTRICS
·
2014
·
IF 0.371
Mi Ouyang,Pingjing Wang,Zhiyan Fu,Cheng Zhang
A novel copolymer based on bis(4-(1H-pyrrol-1-yl)phenyl)methane (BPM) and 3,4-ethylenedioxythiophene (EDOT) is successfully synthesized and characterized through electrochemical methods. The polymer film exhibits three distinct colors (khaki, yellow green, midnight blue) under different potentials, reasonable optical contrast (10% at 422 nm, 5% at 1100 nm) and fast swiching time (2.6 s at 422 nm, 2.2 s at 1100 nm). Beside, SEM images illustrates that the copolymer film presents a much smoother surface than that of the respective homopolymers, which means that the copolymer film have great potential in electrochromic device fabrication.
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高影响因子
Materials
·
2016
·Vol. 9
·期 9
·792
·
IF 2.728
Jianfeng Ban,Linjiang Zhu,Shaojun Chen,Yiping Wang
To better understand shape memory materials and self-healing materials, a new series of liquid-crystalline shape memory polyurethane (LC-SMPU) composites, named SMPU-OOBAm, were successfully prepared by incorporating 4-octyldecyloxybenzoic acid (OOBA) into the PEG-based SMPU. The effect of OOBA on the structure, morphology, and properties of the material has been carefully investigated. The results demonstrate that SMPU-OOBAm has liquid crystalline properties, triple-shape memory properties, and self-healing properties. The incorporated OOBA promotes the crystallizability of both soft and hard segments of SMPU, and the crystallization rate of the hard segment of SMPU decreases when the OOBA-content increases. Additionally, the SMPU-OOBAm forms a two-phase separated structure (SMPU phase and OOBA phase), and it shows two-step modulus changes upon heating. Therefore, the SMPU-OOBAm exhibits triple-shape memory behavior, and the shape recovery ratio decreases with an increase in the OOBA content. Finally, SMPU-OOBAm exhibits self-healing properties. The new mechanism can be ascribed to the heating-induced “bleeding” of OOBA in the liquid crystalline state and the subsequent re-crystallization upon cooling. This successful combination of liquid crystalline properties, triple-shape memory properties, and self-healing properties make the SMPU-OOBAm composites ideal for many promising applications in smart optical devices, smart electronic devices, and smart sensors.
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高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Qingqing Sun,Yanchao Lü,Lingling Liu,Kaiqiang Liu,Rong Miao,Yu Fang
The supramolecular approach plays a pivotal role in the construction of smart and functional materials due to the reversible nature of noncovalent interactions. In the present work, two compounds, cholesterol-functionalized calix[4]pyrrole (CCP) and perylene bisimide diacid (PDA), were synthesized. Little fluorescence is observed in the ethanol solution of the mixture of CCP and PDA, while the solution turns fluorescent upon introduction of ammonia, which is attributed to the formation of a supramolecular ensemble, PDA/(CCP)2/NH3. The fluorescence emission of the as-formed ensemble is sensitive to the presence of phenol, an electron-rich analyte. Interestingly, the sensing can also be observed in the film state, and the relevant detection limit (DL) is lower than 1 ppb. Moreover, the sensing could also be performed in a visualized manner. Upon the basis of the findings, a sensor device with instant response and good reversibility was developed. Further studies revealed that the as-developed fluorescent ensemble is also sensitive to the presence of TNT, an electron-poor compound. The DL for this sensing is ∼80 nM. To our knowledge, this is the first report that a fluorescent sensor could be used for phenol sensing in the vapor state, and for sensing of both electron-rich and electron-poor analytes in solution state. It is believed that the present study presents a distinctive example that demonstrates how smart sensing is realized via combination of the host–guest chemistry of calix[4]pyrrole and the aggregation and disaggregation property of PBI derivatives.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Zhaolei Zhang,Fengyan Fang,Pingping Zhang,Xiaokang Zhang,Hongchao Ma,Yanhui Wei
Efficient detection of 4- nitrophenol (4-NP) organic pollutant is always a very important issue due to the rapid development of chemical industry and the abuse of pesticides and so on. Here, we designed and synthesized a novel supramolecular fluorescent probe , 4-[4-(acetylamino)styryl]-1-cyclodextrin pyridinium p-toluenesulfonate (ASPT-β-CD), for the selective and sensitive detection of 4-NP. The introduction of β-CD not only improves the water solubility of probe and can also be used as a host to encapsulate 4-NP. In alkaline aqueous solution, the absorption spectrum of 4-NP overlaps the excitation spectrum of ASPT-β-CD and suggests that an internal filtration effect occurs between them. We explored the possible response mechanism and speculated that the high selectivity and high sensitivity were derived from the synergistic effect of inner filtering effect and host-guest interaction. Benefiting from the synergistic effect, the proposed sensor ASPT-β-CD displayed significant "turn-off" after adding 4-NP, while showing a fast response to 4-NP within 2 min and low LOD about 0.01 μM. In addition, this method has been successfully applied to the determination of 4-NP in lake water samples, indicating that the obtained ASPT-β-CD has great practical application potential in the environmental field.
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高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Yan Huihui,Xiao Xu-Qiong,Hider Robert C.,Ma Yongmin
A new series of 3-substituted 4-methylene-quinazolinthiones and 4-methylene-quinazolinones were synthesized in moderate to excellent yield through a simple reaction of 2-aminoacetophenones with isocyanates or isothiocyanates. The reaction shows good tolerance of many important functional groups in the presence of air and water under metal-free conditions. Only water is produced as a coproduct, rendering this “green” methodology a highly versatile and eco-friendly alternative to the existing methods for the construction of the quinazolinone/quinazolinthione framework. We have interpreted the reaction mechanism by use of quantum chemical calculations on the basis of state-of-the-art computational methods SMD-B3LYP-D3(BJ)/BS1//B3LYP/BS1.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Tiandong Zhang,Haixin Ma,Tianyuan Yin,Zining Pu,Xue Zhang,Lin Li,Chao Yin,Changhai Zhang,Qingguo Chi
Biaxially oriented polypropylene (BOPP) are the most popular dielectric materials that used in the film capacitors products, however, the maximum operating temperature of BOPP films is only 105 °C, which limits its application in the extreme high-temperature and high-field conditions. Thus, it is urgent to develop the new-typed dielectric films with excellent energy storage performance at elevated temperature for meeting the requirements of new energy vehicles and high-voltage-direct transmission engineering. Recently, non-polar polyolefin poly (4-methyl-1-pentene) (PMP) dielectrics with superior high-temperature endurance and exhibit great potential to replace BOPP. In this work, PMP films have been successfully fabricated by melt casting technique and achieved mass-production. To further improve the high-temperature energy storage performance of PMP dielectric films, we propose a cooperative modulation of the multiscale structures including molecular chains and surfaces. In detail, UV-irradiation grafting of trifluoroethyl methacrylate (TFEMA) onto PMP molecular chains creates “bulk-traps” through polar group effects, which can effectively trap electric charges and reduce conduction loss at high-temperature. Meanwhile, the AlN/PZT heterostructured inorganic barrier layers are deposited onto the surfaces of TFEMA-grafted-PMP films via magnetron sputtering technique. The energy band structure differences between AlN/metal electrodes and AlN/PZT interfaces were utilized to construct interface barriers, thereby suppressing charge injection from metal electrodes and reducing high-temperature conduction losses. The results demonstrate that the high-temperature energy storage performances of the films have been significantly improved by optimizing UV irradiation duration and inorganic barrier layer thickness. At 150 °C, a discharged energy density of 4.23 J/cm 3 with η maintained above 91 % has been achieved, while the films exhibit excellent cycling stability of charge-discharge performances.
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高影响因子
FUEL
·
2026
·
IF 7.8
Bingshuo Li,Xinhang Lv,Tianhua Yang,Haijun Zhang,Xingping Kai,Rundong Li
Catalytic hydrodeoxygenation (HDO) is a promising strategy for upgrading phenolic bio-oil into cycloalkanes. Conventional catalysts often rely on strongly acidic supports, which tend to suffer from rapid deactivation. In this study, 4-ethylphenol was selected as a model compound derived from lignin bio-oil to investigate the effects of active sites on an inert support during the hydrogenation and deoxygenation of the phenolic group. Acid-site–support decoupling catalysts, denoted as Ni-HSiW/h-BN, were successfully prepared and were applied in the HDO of 4-ethylphenol to produce ethylcyclohexane. Using 0.5 g of 4-ethylphenol as the substrate and n-dodecane (30 mL) as solvent, the optimal reaction conditions were identified as a temperature of 300 °C, a reaction time of 3 h and the use of 15% Ni-HSiW 0.25 /h-BN catalyst. Under these conditions, complete conversion of 4-ethylphenol was achieved with 100% selectivity toward ethylcyclohexane. When the temperature was lowered to 180 °C and the reaction time reduced to 1 h using 15% Ni/h-BN, the main product shifted to ethylcyclohexanol with a selectivity of 94.4%. A reaction mechanism was proposed, indicating that the combination of Ni and HSiW synergistically enhances HDO efficiency.
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高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Zhirong Ren,Shaozhen Liu,Jiaxin Wang,Haihan Zhou
Flexible supercapacitors (SCs) with a sandwich structure constructed using traditional current collectors usually exhibit poor utilization of electroactive materials and unsatisfactory mechanical deformation stability. In this work, a novel polyvinyl alcohol-4-carboxyphenylboronic acid hydrogel-coated graphite paper (PVA-CPBA/GP) current collector is developed. The CPBA dopants covalently immobilized on PVA chains act as anchoring sites, promoting the dispersed growth of polypyrrole (PPy) within the 3D hydrogel network. The resulting PPy@PVA-CPBA electrode with an interpenetrating network structure shows evidently enhanced electrochemical performance compared to PPy/PVA and PPy electrodes. Using the PVA-CPBA/GP current collector, a separator-free back-to-back flexible SC is also constructed successfully. The device exhibits an areal capacitance of 110.2 mF cm⁻ 2 at 0.5 mA cm⁻ 2 , retains 82.6 % of its initial capacitance after 10,000 cycles, and maintains 83.8 % of its initial capacitance after 1000 bending cycles. These performance metrics are significantly higher than those of the PPy/PVA SC as a control. This work demonstrates that the developed PVA-CPBA/GP current collector not only promotes the highly efficient utilization of PPy, enhancing the capacitive performance and cycling stability of the SC, but also enables the construction of a separator-free back-to-back flexible SC, thereby improving its mechanical deformation stability. The hydrogel-based current collector we propose presents a new perspective for developing high-performance flexible SCs.
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