FOOD CHEMISTRY
·
2019
·
IF 5.399
Lin Yue,Dan Sun,Imran Mahmood Khan,Xiaoli Liu,Qixing Jiang,Wenshui Xia
The present study aims at synthesizing and in vitro antibacterial activity evaluation of chitosan oligosaccharide (COS) modified by Cinnamyl alcohol (Cin) onto the OH position of COS . Three different degrees of substitution (DS) COS-O-Cin1-3 were synthesized by changing different molar ratios of COS to Cin. UV–visible spectroscopy (UV–vis), Fourier transform infrared (FT-IR), 1 H nuclear magnetic resonance ( 1 H NMR), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and elemental analysis were conducted to characterize the successful synthesis of COS-O-Cin1-3. The results showed that they exhibited higher thermal stability, weaker crystallinity and better antibacterial properties than that of COS . These results aided in obtaining the important supports for exploring new functional antibacterial agents, which expand the scope of COS’s application in the food industry.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2018
·
IF 5.089
Jiawei Wan,Ying Hu,Tingyang Ai,Shuxin Ye,Qing Huang,Qile Yang,Jing Li,Bin Li
The spoilage and weight loss of meat products during storage always results in numerous problems for their commercialization and economic value. An edible thermo-reversible emulgel was prepared in this study, and its application in the preservation of meat products was investigated. The microstructure of the emulgel in liquid and solid forms was characterized. The decreased gel strength of the emulgel compared to the gelatin gel was likely due to the presence of the surfactant. The interaction between eugenol (Eu) and gelatin was mainly due to hydrophobic interactions and was weakened at 4 °C. The results of the physicochemical and antibacterial experiments for the meat products showed that the emulgel effectively controlled the release of Eu on the meat surface; thus, it could significantly inhibit the growth of microorganisms and weight loss in meat, which prolonged the shelf-life of meat for more than 3 days. The transparent emulgel can be easily removed from meat by soaking in warm water (∼40 °C), and it is a promising application for improving the safety and quality of meat products.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Qianqian Zhang,Yifan Sun,Wei Li,Jinli Zhang,Yan Fu
Selective hydrogenation of α, β-unsaturated aldehydes has always been a hot research topic owing to favorable thermodynamics in C C hydrogenation. In this work, a series of Pd/SnO 2 nanocatalysts were facilely synthesized under mild conditions, via the reduction of Na 2 PdCl 4 by dimethylaminoborane. Under galvanostatic electrolysis at 3.33 mA cm −2 for 8 h, the selective conversion of cinnamaldehyde (CAL) was achieved over Pd/SnO 2 -coated carbon fiber in neutral phosphate buffer, giving the cinnamyl alcohol (COL) selectivity of 78.85% at the conversion of 84.88%. The Pd/SnO 2 nanocatalysts outperform commercial Pd/C catalysts, showing high COL selectivity and faradaic efficiency. The cathodic reduction potential of CAL over Pd 4·3 /SnO 2 occurs at −0.92 V. The SnO 2 support is beneficial to promote the C O adsorption of CAL and lower the HER activity of Pd nanocatalysts, thereby contributing to superior activity of Pd 4·3 /SnO 2 for selective hydrogenation of CAL.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2019
·
IF 4.63
Yihu Dai,Xiaofang Chu,Jingjing Gu,Xing Gao,Min Xu,Di Lu,Xiaoyue Wan,Wei Qi,Bingsen Zhang,Yanhui Yang
The CeO 2 -supported ternary RuSnB catalysts were synthesized by incipient wetness impregnation procedures and applied in hydrogenation of cinnamaldehyde in pure water as the solvent. A synergy effect between Ru-based catalysts and water molecules has afforded the efficiently selective transformation of cinnamaldehyde to cinnamyl alcohol with the satisfactory conversion and selectivity. Structural characterization results suggested the incorporation of Ru sites into the SnO x matrix and the electronic interaction between Ru and B additives in RuSnB/CeO 2 catalyst. The isotopic exchange studies have demonstrated that both dissociative activation of H 2 and H 2 O (deuterated D 2 and D 2 O) were apparently affected by the status of Ru sites. Furthermore, the kinetics tests in D 2 O solvent have also revealed the co-existence of water-involved hydrogen-exchange route with the direct hydrogenation route using dissociative H 2 during the hydrogenation reaction. The optimal Ru 2 Sn 1 B 1 /CeO 2 catalyst could afford the best H 2 O-activation capability and thus accelerate the reaction rate in the H 2 O-involved hydrogenation.
研究领域:
催化化学
·
绿色化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Si Li,Lingyu Wang,Minghe Zhu,Dandan Han,Ya Liu,Mingyang Chen,Jie Hou,Junbo Gong
The solubility of cinnamyl alcohol in 11 pure solvents (methanol, ethanol, n-propanol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, sec-butyl alcohol, acetone, methyl acetate, ethyl acetate and n-hexane) and two binary solvents of n-hexane + (n-propanol, n-butyl alcohol) was measured by a gravimetric method over temperatures from 253.15 K to 293.15 K at atmosphere pressure. From the experimental results, it was found that the solubility increased with the increasing temperature in all these solvents. The Apelblat model, the λh model, and the nonrandom two-liquid (NRTL) model were used to correlate the solubility data of cinnamyl alcohol in pure and mixed solvents. The thermodynamic properties of the mixing process in binary solvents were calculated by the NRTL model. The result indicates that the mixing process of cinnamyl alcohol is endothermic and spontaneous. The experimental solubility provides good guidance for the subsequent study of crystallization design and crystal morphology of cinnamyl alcohol.
研究领域:
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Ruyi Geng,Huanhuan Jia,Youwei Xie,Dahai Pan,Feng Yu,Binbin Fan
UiO-66 supported metal catalysts have shown high catalytic activity and selectivity to cinnamyl alcohol (COL) in the selective hydrogenation (SHYD) of cinnamaldehyde (CAL), but the roles of missing-linker defects (MLDs) in UiO-66 on the catalytic performance of the UiO-66 supported metal catalysts have less been reported. Here, UiO-66 supports with the different amount of MLDs were used as the supports, and three series of UiO-66 supported Pt (Pt/U) catalysts were prepared by sol-impregnation, wet-impregnation as well as in-situ encapsulation methods, respectively. The influences of the MLDs in UiO-66 on the catalytic properties of the prepared Pt/U catalysts in the SHYD of CAL were investigated. The series of Pt/U-720 catalysts with the more MLDs showed higher CAL conversion and selectivity to COL than the corresponding Pt/U-F catalysts with fewer MLDs. The different preparing methods affect the location and dispersion of Pt species on UiO-66 supports and the metal-support interaction, but the location of the supported Pt species on UiO-66 is the critical factor affecting the catalytic properties of Pt/U catalysts. The presence of the MLDs in UiO-66 is the key to preparing UiO-66 supported Pt catalysts with high SHYD performance.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2018
·
IF 6.759
Yihu Dai,Xing Gao,Xiaofang Chu,Chunyang Jiang,Yao Yao,Zhen Guo,Chunmei Zhou,Chuan Wang,Hongming Wang,Yanhui Yang
A series of carbon nanotube (CNT)-supported bimetallic PtFe nanoparticles were synthesized and employed as catalysts for hydrogenation of cinnamaldehyde in pure water. A synergy between water and bimetallic PtFe catalysts has allowed the efficiently selective production of cinnamyl alcohol. With the aid of water, an initial reaction rate of >1200 h −1 and a high selectivity of >97%, as well as a good cycling stability, were achieved with a Pt 3 Fe/CNT catalyst under mild reaction conditions. Isotopic labeling studies and theoretic calculation results demonstrated that the water-involved hydrogen-exchange pathway occurred with a lower energy barrier, which coexisted with the pathway of direct H 2 dissociation–hydrogenation. This work also suggested that water participated in the catalytic hydrogenation reaction by serving as a hydrogen-exchange bridge.
研究领域:
催化化学
·
绿色化学
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2025
·
IF 1.7
Wang Yunqian,Shi Haixiang,Chen Liuyun,Su Tongming,Luo Xuan,Xie Xinling,Ji Hongbing,Qin Zuzeng
NiIn intermetallic compounds are constructed over V 2 CT x MXene for the selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL). Ni 4 In/V 2 CT x demonstrated a conversion rate of 93.6% for CAL, with a high selectivity of 77.4% for COL. The COL yield of Ni 4 In/V 2 CT x is much greater than that of Ni 4 In, Ni/V 2 CT x , and Ni 4 In/Al 2 O 3 . Moreover, the V 2 CT x support is the key to the formation of NiIn intermetallic compounds, which effectively inhibit the oxidation of metallic Ni. NiIn metal particles are uniformly distributed on the surface of V 2 CT x , increasing the metal‒support interaction. Electron-deficient metallic Ni and In inhibit the hydrogenation of the C=C bond. Furthermore, the introduction of In provides more abundant and stronger Lewis acid sites, facilitating the adsorption of C=O bonds and thereby enhancing the selectivity for COL.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 8
·3336
·
IF 4.6
Mengting Chen,Yun Wang,Limin Jiang,Yuran Cheng,Yingxin Liu,Zuojun Wei
Allylic alcohols typically produced through selective hydrogenation ofα,β-unsaturated aldehydes are important intermediates in fine chemical industry, but it is still a challenge to achieve its high selectivity transformation. Herein, we report a series of TiO2-supported CoRe bimetallic catalysts for the selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) using formic acid (FA) as a hydrogen donor. The resultant catalyst with the optimized Co/Re ratio of 1:1 can achieve an exceptional COL selectivity of 89% with a CAL conversion of 99% under mild conditions of 140 °C for 4 h, and the catalyst can be reused four times without loss of activity. Meanwhile, the Co1Re1/TiO2/FA system was efficient for the selective hydrogenation of variousα,β-unsaturated aldehydes to the correspondingα,β-unsaturated alcohols. The presence of ReOxon the Co1Re1/TiO2catalyst surface was advantageous to the adsorption of C=O, and the ultrafine Co nanoparticles provided abundant hydrogenation active sites for the selective hydrogenation. Moreover, FA as a hydrogen donor improved the selectivity toα,β-unsaturated alcohols.Keywords:cinnamaldehyde;cinnamyl alcohol;CoRe bimetallic catalyst;selective hydrogenation;formic acid
研究领域:
化学工程
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2016
·Vol. 147
·期 1
·102-109
·
IF 2.294
Zhang Yifei,Zhang Shaohua,Pan Xiaoli,Bao Ming,Huang Jiahui,Shen Wenjie
Abstract Uniform Au particles with a mean size of 1.9 nm were initially synthesized with polyvinyl alcohol (PVA) as protecting agent, and then deposited on MgO, Al 2 O 3 , TiO 2 , Fe 2 O 3 , Co 3 O 4 , ZnO and In 2 O 3 . After calcinations at 300 °C in air to remove PVA, Au particles were highly dispersed and immobilized on all the supports, displaying narrow diameter distributions and almost identical mean sizes of 2.5–3.2 nm. The Au-oxides catalysts were further used to catalyze selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL). It was found that the selectivity of COL was tightly related to the acidity/basicity of the Au/oxides catalysts. The catalyst with only acidic sites such as the Au/Al 2 O 3 catalyst gave very low selectivity of COL of 15%. The catalysts with only basic sites such as Au/MgO catalyst displayed medium selectivity of COL of 52%. Interesting, the Au catalysts with both acidic and basic sites such as the Au/In 2 O 3 and Au/ZnO catalyts exhibited the highest selectivity of COL of around 86%. The synergistic cooperation of acidic sites and basic sites should be responsible for preferential adsorption and activation of the C=O group than C=C group in CAL, and then preferential hydrogenation of C=O to COL. Graphical Abstract
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2024
·
IF 2.8
Xin-Yu Liu,Wen-Zhu Wang,Song-Po Yao,Xue-Ying Li,Rui-Min Han,Dangquan Zhang,Zhijun Zhao,Yapei Wang,Jian-Ping Zhang
Rosemary is one of the most promising, versatile, and studied natural preservatives. Carnosic acid (CA) and carnosol (CARN), as the primary active ingredients of rosemary extracts, have little difference in structure, but their antioxidant activities vary significantly, depending on the system studied. The underlying molecular mechanisms remain unclear. By means of optical spectroscopies, stopped-flow, laser photolysis, and density functional theory (DFT) calculations, we have compared CA and CARN between their reaction dynamics of radical scavenging, metal ion chelation, and oxidation inhibition in lipid emulsion and beef, as well as between their interactions with β-carotene (β-Car). For reference, 3-isopropyl catechol (IC), which is structurally similar to the active groups of CA and CARN, was studied in parallel. It is found for CA that the intramolecular hydrogen bond can boost the acidity of its phenol hydroxyl and that the synergistic effect with β-Car can substantially enhance its antioxidation activity in the model systems of lipid and meat via the CA-to-β-Car electron transfer reaction. The substitution of A and B rings on the catechol group in both CA and CARN limits browning caused by their formation of oxidative products as antioxidants.
研究领域:
食品科学
·
分子生物学
·
植物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yonghui Wu,Lu Yang,Guangyou Shi,Ling Zou,Jian He,Jinbao Li,Anwei Zhang,Xinxing Wang,Zhiwei Liu,Keyong Tang,Xiaochao Yang
Delayed healing due to the persistent microenvironment disorder caused by the hyperglycemia and persistent inflammatory reaction is a core pathological characteristic of diabetic wound. Topical microenvironment modulation represents an important avenue to address delayed healing issue. Microneedles are powerful tools for topical microenvironment modulation as they can effectively deliver therapeutic ingredients into the shallow surface layer of the wound based on their depth-limited tissue penetration capability. Herein, a hybrid microneedle composed of carvacrol (CV), cyclodextrin (CD), mesoporous ceria nanoparticles (MCNs) and hyaluronate (HA) is constructed with objective to modulate the microenvironment within the diabetic wound. The hybrid microneedle is constructed via a two-stage process comprising three stepwise embedding procedures in the first stage and four microneedle casting procedures in the second stage. The physical, chemical and antibacterial performances, as well as the in vitro and in vivo therapeutic potentials, of the hybrid microneedle are evaluated. The therapeutic ingredients, mainly CV and MCNs, incorporated in the microneedle can be readily released into the diabetic wound, and effective microenvironment modulation is realized through the designed antibacterial, antioxidant and anti-inflammatory functions. Consequently, the tissue reconstruction processes including cell proliferation and migration, angiogenesis, and collagen deposition are accelerated due to the improved microenvironment.
研究领域:
生物医学工程
·
材料科学
·
药剂学
✓ 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）