CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2018
·
IF 2.795
Chen Lu,Jiaming Hu,Yuning Meng,Aidong Zhou,Feng Zhang,Zhibing Zhang
To resolve the defects of acetic acid solvents for the liquid-phase oxidation of toluene to benzaldehyde with oxygen, a low-corrosive and green method was developed by introducing benzyl benzoate into the reaction. It was found that compared with the case of acetic acid, benzyl benzoate showed gratifying effect on the oxidation of toluene to benzaldehyde. The reaction was more active in the initial stage of oxidation, and the generated benzaldehyde was protected from further oxidation due to the synergistic effect of benzyl benzoate along with toluene-derived products benzyl alcohol and benzyl bromide. Benzyl benzoate inhibited the esterification of benzyl alcohol, while benzyl bromide promoted the formation of benzyl alcohol. Therefore, considerable benzyl alcohol concentration could be maintained and high benzaldehyde selectivity could be achieved under high toluene conversion.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PEST MANAGEMENT SCIENCE
·
2023
·
IF 4.1
Jingsheng Zhang,Yanwei Xia,Jiayong Liang,Changlu Wang,Hualong Qiu,Yurong He,Tao Ma,Lei Wang,Desen Wang
BACKGROUND The bites and blood sucking of bed bugs ( Cimex spp.) (Hemiptera: Cimicidae) pose a serious threat to human physical and mental health. Application of an effective repellent can prevent or reduce bed bug bites. Previous studies on repellent screening mainly focused on Cimex lectularius L. In this study, we investigated the repellent effect of two safe food additives, ethyl anthranilate (EA) and butyl anthranilate (BA), against Cimex hemipterus (F.), and also explored the role of antennae and mouthparts on C. hemipterus perception of repellents. RESULTS Both EA and BA had a strong repellent effect against tropical bed bugs and their repellency was similar or lower than that of N , N -diethyl-3-methyl benzoyl amide, depending on whether or not a CO 2 source was present. EA had higher repellency than BA and exhibited repellency to C. hemipterus for 3 days when a CO 2 source was present. C. hemipterus avoided resting on 20% EA- and BA-treated harborages. Applying 20% EA and BA on rabbit skin significantly reduced the blood intake of C. hemipterus within 2 h. C. hemipterus could perceive EA and BA after their antennae or mouthparts or both antennae and mouthparts were removed. CONCLUSION Both EA and BA had strong repellency against C. hemipterus , with EA being more repellent. Ablation of antennae and mouthparts did not affect the perception of EA and BA by C. hemipterus . © 2023 Society of Chemical Industry.
研究领域:
昆虫学
·
害虫控制
·
化学生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PLANT AND CELL PHYSIOLOGY
·
2018
·Vol. 59
·期 9
·1889-1904
·
IF 4.059
Zhang Wei,Lu Li-Ying,Hu Li-Yan,Cao Wei,Sun Kai,Sun Qi-Biao,Siddikee Ashaduzzaman,Shi Run-Han,Dai Chuan-Chao
Allelopathy is mediated by plant-derived secondary metabolites (allelochemicals) which are released by donor plants and affect the growth and development of receptor plants. The plant root is the first organ which senses soil allelochemicals this results in the production of a shorter primary root. However, the mechanisms underlying this process remain elusive. Here, we report that a model allelochemical benzoic acid (BA) inhibited primary root elongation of Arabidopsis seedlings by reducing the sizes of both the meristem and elongation zones, and that auxin signaling affected this process. An increase in auxin level in the root tips was associated with increased expression of auxin biosynthesis genes and auxin polar transporter AUX1 and PIN2 genes under BA stress. Mutant analyses demonstrated that AUX1 and PIN2 rather than PIN1 were required for the inhibition of primary root elongation during BA exposure. Furthermore, BA stimulated ethylene evolution, whereas blocking BA-induced ethylene signaling with an ethylene biosynthesis inhibitor (Co2+), an ethylene perception antagonist (1-methylcyclopropene) or ethylene signaling mutant lines etr1-3 and ein3eil1 compromised BA-mediated inhibition of root elongation and up-regulation of auxin biosynthesis-related genes together with AUX1 and PIN2, indicating that ethylene signal was involved in auxin-mediated inhibition of primary root elongation during BA stress. Further analysis revealed that the BA-induced reactive oxygen species (ROS) burst contributed to BA-mediated root growth inhibition without affecting auxin and ethylene signals. Taken together, our results reveal that the allelochemical BA inhibits root elongation by increasing auxin accumulation via stimulation of auxin biosynthesis and AUX1/PIN2-mediated auxin transport via stimulation of ethylene production and an auxin/ethylene-independent ROS burst.
研究领域:
植物学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
TALANTA
·
2020
·
IF 5.339
Qi Zhou,Xuelin Dong,Binbin Zhang,Shan Lu,Xinwei Zhang,Qin Wang,Yonggui Liao,Yajiang Yang,Hong Wang
The luminescent terbium (Tb 3+ )-loaded supramolecular gels were facilely prepared through the self-assembly of Fmoc-diphenylalanine (FmocPhePhe) at room temperature . Hydroxybenzoic acid (HA, the isomers are denoted as 2-HA, 3-HA, and 4-HA depending upon the positions of hydroxyl groups) was used as a sensitizer to Tb 3+ . The luminescence sensitization of Tb 3+ in the gels was realized by the coordination with hydroxybenzoic acids. The spectra of luminescence, UV–vis, FT-IR, and 1 H NMR verified that this sensitization was attributed to the energy transfer from hydroxybenzoic acids to Tb 3+ . The results of XRD, SEM, and phase transfer temperature further indicated that the initial molecule arrangement of the gels was significantly changed by 2-HA, resulting in more ordered and more compact morphology of the gels. 2-HA exhibited more effective sensitization to Tb 3+ in the gels than 3-HA and 4-HA. It was also found that 2-HA did not affect the self-assembly of FmocPhePhe. Due to the effective fluorescence sensitization by 2-HA, the as-prepared gels can be used for salicylic acid sensing with 6.8 μM of the detection limit. This strategy has been successfully used for the detection of salicylates in pharmaceuticals and cosmetics.
研究领域:
化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIODEGRADATION
·
2017
·Vol. 29
·期 1
·1-10
·
IF 2.018
Wang Hui,Hu Jinxing,Xu Kai,Tang Xianjin,Xu Xinhua,Shen Chaofeng
Two biphenyl-degrading bacterial strains, SS1 and SS2, were isolated from polychlorinated biphenyl (PCB)-contaminated soil. They were identified as Rhodococcus ruber and Rhodococcus pyridinivorans based on the 16S rRNA gene sequence, as well as morphological, physiological and biochemical characteristics. SS1 and SS2 exhibited tolerance to 2000 and 3000 mg/L of biphenyl. And they could degrade 83.2 and 71.5% of 1300 mg/L biphenyl within 84 h, respectively. In the case of low-chlorinated PCB congeners, benzoate and 3-chlorobenzoate, the degradation activities of SS1 and SS2 were also significant. In addition, these two strains exhibited chemotactic response toward TCA-cycle intermediates, benzoate, biphenyl and 2-chlorobenzoate. This study indicated that, like the flagellated bacteria, non-flagellated Rhodococcus spp. might actively seek substrates through the process of chemotaxis once the substrates are depleted in their surroundings. Together, these data provide supporting evidence that SS1 and SS2 might be good candidates for restoring biphenyl/PCB-polluted environments.
研究领域:
环境微生物学
·
生物修复
·
微生物生态学
·
趋化性
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 86
·70178-70185
·
IF 3.84
Mingfang Ma,Jinge Gu,Minmin Yang,Zhaolou Li,Zhuoqun Lu,Yimeng Zhang,Pengyao Xing,Shangyang Li,Xiaoxiao Chu,Yajie Wang,Qi Li,Minyan Lin,Aiyou Hao
Sodium benzoate is an important and widely used food additive, however, its self-assembly properties in diverse solvents have been rarely studied. Here, we report different self-assembled aggregates, including sodium benzoate vesicles and sodium benzoate gel, in different solvent environments. Sodium benzoate vesicles and gel were identified by Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM) and Dynamic Light Scattering (DLS). Ultraviolet-visible (UV-vis) spectroscopy, Fourier Transform Infrared (FT-IR) spectroscopy, Thermal Gravity Analysis (TGA), Differential Scanning Calorimetry (DSC) and Small-Angle X-ray Scattering (SAXS) were further employed to study the formation mechanism of the sodium benzoate gel. A possible gel formation mechanism was proposed. Furthermore, sodium benzoate gel has multiple stimulus responsiveness, the addition of hydrochloric acid and metal ions can all cause disaggregation of sodium benzoate gel. Finally, sodium benzoate aggregates were found in calf serum.
研究领域:
材料科学
·
食品科学
·
化学
✓ 已验证
DOI
高影响因子
e-Journal of Surface Science and Nanotechnology
·
2023
·Vol. 21
·期 1
·1-8
·
IF 0.7
J. F. Huang,F. H. Tao,F. Y. Li,Z. Y. Cai,L. Z. Pei
Polypyrrole (PPy)/CuBi2O4 nanosheets (NSs) were prepared by an in situ polymerization process and the NS-modified glassy carbon electrode (GCE) for electrochemical determination of benzoic acid was studied. The structure, morphology, and functional groups of the PPy/CuBi2O4-NSs were analyzed by X-ray diffraction, transmission electron microscopy (TEM), high-resolution TEM, and Fourier transform infrared spectroscopy. The obtained NSs contain a tetragonal CuBi2O4 phase, and nanoscale PPy particles attach to the surface of the NSs. The electrochemical responses of the PPy/CuBi2O4-NS-modified GCE in 0.1 M KCl solution with benzoic acid were investigated by the cyclic voltammetry (CV) and electrochemical impedance spectroscopy. An irreversible CV peak is located at −0.84 V on the PPy/CuBi2O4-NS-modified GCE in 2 mM benzoic acid and 0.1 M KCl solution. The intensities of the CV peaks show linear variation with increasing the scan rate and concentration of benzoic acid. The linear range is 0.001−2 mM with a detection limit of 0.52 μM. The PPy/CuBi2O4-NS-modified GCE shows high stability and reproducibility. The prepared PPy/CuBi2O4-NSs have great promise in the electrochemical detection of benzoic acid.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
·
2020
·Vol. 34
·期 21
·e8893
·
IF 2.2
Yunfeng Chai,Hongping Chen,Chengyin Lu
Rationale Loss of carbon dioxide is an important characteristic fragmentation reaction of deprotonated benzoic acid and its derivatives in electrospray ionization mass spectrometry. However, researchers have rarely noticed or believed that the loss of carbon dioxide in multistage mass spectrometry is a “reversible reaction,” that is, the fragment anion generated by carbon dioxide loss can capture another carbon dioxide to regenerate its precursor ion. Methods The fragmentation of the [M − H] − ions of dicamba (3,6-dichloro-2-methoxybenzoic acid) and benzoic acid was performed with an electrospray ionization hybrid quadrupole-orbitrap mass spectrometer. The structural confirmation of the precursor ions and their product ions was supported by accurate mass (elemental composition) analysis. Pseudo-MS 3 experiments (in-source collision-induced dissociation as MS 2 ) and isotope labelling experiments were used to confirm the addition of carbon dioxide to the product ions in MS 2 . Results In the fragmentation of deprotonated dicamba ( m / z 219), the relative abundance of the precursor ion does not decrease significantly or even increases as the collision energy increases. When the m / z 145 and 175 product ions were isolated in the mass analyzer, the ions 44 m / z units larger ( m / z 189 and 219) were generated spontaneously, indicating the formation of carbon dioxide adduct ions. In the fragmentation of deprotonated [ carboxyl - 13 C]-benzoic acid ( m / z 122), a deprotonated [ carboxyl - 12 C]-benzoic acid ion ( m / z 121) was generated which was derived from 13 CO 2 loss and 12 CO 2 addition. The isotope labelling experiment further supports the formation of CO 2 -attached ions in the fragmentation of deprotonated benzoic acids. Conclusions Under collisional activation, deprotonated dicamba and benzoic acids easily undergo carbon dioxide loss, but the decarboxylated product anions have an appropriate nucleophilicity to carbon dioxide and they can capture a background carbon dioxide molecule remaining in the vacuum system to regenerate the precursor ions. This study provides a new and deeper understanding of the gas-phase chemistry of deprotonated benzoic acid derivatives in mass spectrometry.
研究领域:
分析化学
·
质谱学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Jiasheng Zhou,Zimo Lou,Jiang Xu,Xiaoxin Zhou,Kunlun Yang,Xiaoyu Gao,Yilin Zhang,Xinhua Xu
In this study, a novel approach was developed for the dechlorination of 2,4-dichlorobenzoic acid (2,4-DCBA) via the combination of the moveable activated carbon (AC) supported palladium (Pd) nanoparticles and nickel (Ni) foam electrode. The morphology and chemical structure of Pd/AC catalyst was investigated by various characterization techniques, including SEM, TEM, EXS-mapping, XRD, and XPS. Pd nanoparticles was successfully loaded and dispersed on the AC, accompanied with the significantly enhanced reactivity. The removal rate of 2,4-DCBA by Ni electrode with moveable Pd/AC catalyst was 222, 25, and 5 folds higher than dispersed AC and Ni electrode system, chemical deposited Pd/Ni electrode, and electrodeposited Pd/Ni electrode, respectively. Compared with the conventional electrocatalytic reductive approach which deposited Pd on the Ni foam electrode, moveable Pd/AC catalyst possesses higher surface area, more atomic H ∗ production and more active sites, favored mass transfer, and enhanced reactivity, without the consideration of catalyst loss and deactivation. The effects of Pd:AC mass ratio, constant current, initial solution pH, and electrolyte concentration on the dechlorination of 2,4-DCBA were studied. Generally, high Pd loading, constant current, and acidity favored the dechlorination of 2,4-DCBA, while excessive electrolyte would inhibit the dechlorination of 2,4-DCBA. Good longevity and recyclability of moveable Pd/AC catalyst was confirmed via consecutive experiments. The findings of the present study show that making the catalyst moveable is a promising strategy for electrocatalytic remediation technology.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Shun-Ping Zhao,Xin-Yue Zuo,Yu Guo,Jie Wang,Rong-Yi Huang,Qiao Qiao
The synthesis of new clay-organic nanocomposites with potential application value is one of the research hotspots in the field of functional materials . Herein, benzoic acid intercalated kaolinite compound (K-BzCOOH, calculated as Al 2 Si 2 O 5 (OH) 4 ·(BzCOOH) 0.556 , d (001) of 1.419 nm, and 51.5% intercalation rate) was synthesized, and its preparation methods, intercalation mechanisms and dielectric properties were investigated thoroughly. The results show that K-BzCOOH must be obtained under high pressure with K-DMSO as the precursor and methanol as the solvent. The benzoic acid molecules are arranged in an inclined monolayer between kaolinite layers, and benzene ring and the center of gravity of benzoic acid molecules are close to the surface of alumina layer. Hydrogen bonds are mainly present between H(Al-sheet) and O(c=o), and between H(coo-h) and O(Si-sheet). The interfacial interaction between inorganic and organic components is − 47.11 kJ/mol. Dielectric measurements show that K-BzCOOH exhibits relaxation behavior in the range of 1–10 7 Hz and 10–100 °C, attributed to the limited dipole motion of benzoic acid molecules under the action of external electric field. Also, the compound has a low dielectric constant at frequencies greater than 10 6 Hz (6.9 and 8.8 at 10 °C and 100 °C, respectively), which can be considered as a low- k material for semiconductor industry.
研究领域:
功能材料
·
无机化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2023
·Vol. 25
·期 17
·6717-6727
·
IF 9.8
Xi Luo,Jiahui Zhan,Qingqing Mei,Shicheng Zhang
Polystyrene plastic is a widely used artificial material, but there is still no efficient, economic or environmentally friendly recycling method for waste polystyrene plastic, which has caused serious environmental pollution and a waste of resources. Herein, the method of nitric acid oxidative upgrade is used to convert polystyrene plastic into a high-value chemical raw material, benzoic acid. The yield can reach nearly 90% at 180 °C within 3 h, and the purity of the product is more than 95%. In this process, nitric acid is decomposed by heat to generate nitrogen dioxide and oxygen, which react with the carbon-centered radicals formed at weak sites on the long chain of polystyrene and further generate peroxy radicals and hydroxyl radicals. The formation of oxygen-containing functional groups promoted the fracture of the C–C bond and eventually formed benzoic acid. In addition, this method also has good treatment effects on real-life polystyrene plastic products. This research provides a new method for the recycling and high-value utilization of waste polystyrene plastics. The intrinsic material value of polymers can be maintained by recycling functional chemicals through oxidative upgrade.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2017
·Vol. 72
·期 1
·51-56
·
IF 1.258
Wei Mengyi,Qian Chao,Chen Xinzhi
Based on the recycling of NO
x
, the Cu(I)- and HNO 3 -catalyzed oxidation of 2-chloro-4-(methylsulfonyl)toluene to 2-chloro-4-(methylsulfonyl)benzoic acid has been developed with an excellent yield of 84.2% and a purity of 99.7%. The optimized reaction conditions (160 °C, oxygen pressure 1.5 MPa, HNO 3 concentration 25 wt%, HNO 3 : substrate 0.5:1) use 1.0 mol% CuI as catalyst. The dosage of HNO 3 in the new process is only 25% of the stoichiometric amount and 12.5% of the amount of the traditional process. The NO
x
emission is 5% amount of the traditional process. The oxidation of several additional toluene derivatives with comparable yields demonstrates the generality to these reaction conditions.
研究领域:
化学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）