JOURNAL OF SOLUTION CHEMISTRY
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2020
·Vol. 49
·期 7
·1068-1081
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IF 1.273
Zhang Bei,Wu Di,Zhu Huaxiang,Fang Jing,Zhou Lina,Hou Baohong,Chen Wei
The solubility data of sorbic acid in binary systems of (ethanol + water), (1-propanol + water) and (2-propanol + water) were measured from 283.15 to 323.15 K using the static equilibrium method under atmospheric pressure. It was found that the solubility of sorbic acid in the three binary solvent systems increased with increasing temperature as well as increasing initial mole fraction of organic solvent in these systems. The van’t Hoff–Jouyban–Acree model, the modified Apelblat–Jouyban–Acree model and the CNIBS/R-K model were proposed for correlating the experimental solubility values in various solution systems. Furthermore, the dissolution thermodynamic properties of Gibbs energy change (Δ sol G o ), molar enthalpy change (Δ sol H o ) and molar entropy change (Δ sol S o ) were calculated from the experimental solubility data, using the van’t Hoff equation. The positive values of Δ sol G o , Δ sol H o and Δ sol S o indicate that these dissolution processes of sorbic acid in the solvents studied were all endothermic and entropically favorable. In addition, the change of dissolution enthalpy was the main contributor to the positive value of the molar Gibbs energy of the dissolution process. The experimental solubility and the models used in this work would be conducive to purifying sorbic acid from its crude mixtures.
研究领域:
化学
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物理化学
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DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2015
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IF 2.679
Jing Fang,Meijing Zhang,Peipei Zhu,Jinbo Ouyang,Junbo Gong,Wei Chen,Fengxia Xu
By the gravimetric method, the solubility of sorbic acid in eight solvents including ethanol, 2-propanol, methanol, 1-butanol, ethyl acetate, methyl tert-butyl ether, acetone and acetonitrile was determined over a temperature range from 285.15 to K at atmospheric pressure. For the temperature range investigated, the solubility of sorbic acid in the solvents increased with increasing temperature. The experimental values were correlated with the linear solvation energy relationship, modified Apelblat equation, λh equation, non-random two-liquid (NRTL) model, and Wilson model. On the other hand, the enthalpy, entropy and Gibbs free energy of dissolution were obtained from these solubility values by using the van’t Hoff and Gibbs equations. The excess enthalpy of solution was estimated on the basis of λh equation. Furthermore, the a priori predictive model COSMO-RS was employed to predict the solubility of sorbic acid in selected solvents and reasonable agreement with experimental values is achieved.
研究领域:
化学工程
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物理化学
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DOI
高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Hang Shen,Xiaojie Chen,Botuo Zheng,Huagui Zhang
Biopolymers as abundant, sustainable, and environment-friendly renewable material have been regarded as the best alternative to nondegradable fossil products. However, these biopolymers are often confronted with problems such as high prices, poor mechanical properties, and susceptibility to bacterial erosion. In the current study, inverse vulcanization was adopted to synthesize polymers with multisulfur segments cross-linked by plant-based sorbic acid and non-edible tung oil. The synthesized copolymer exhibited tailorable glass transition temperatures (0.3–24.8 °C) and rheological behaviors with modulus alterable within an order of magnitude. The addition of transesterification catalyst Zn(acac)2 lowered the activation energy of stress relaxation by ∼20 kJ/mol. Thanks to the dynamic reversible S–S bonds, this networked polymer also exhibited regulatable thermal self-healing behaviors. Moreover, in the blending with polylactide (PLA), the reversible dissociation of S–S bonds at high temperature facilitates the dispersion of polysulfides in the PLA matrix, which can be further improved by adding catalyst, adjusting monomer ratios, etc. As a result, the polysulfides not only toughen the PLA but also endow the blends with excellent antibacterial activities attributed to the intrinsic bacteriostatic sorbic acid and sulfur. Used as a modifer for bioplastics to adjust their mechanical properties and functions, polysulfides are expected to have potential applications in medical materials or food packaging fields.
研究领域:
材料科学
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生物医学工程
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高分子化学
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DOI
高影响因子
CRYSTENGCOMM
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2023
·Vol. 25
·期 34
·4889-4901
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IF 3.1
Chang Li,Di Wu,Zhenguo Gao,Wei Chen
The cocrystals and salts of sorbic acid (SA), nicotinamide (NIA), piperazine (PIP) and 2,6-diaminopyridine (2,6-DAP) were synthesized for the first time and characterized by XRD, FT-IR, DSC and TG. The solubility of SA and its multicomponent crystals in aqueous solution at 37 °C was measured. The results showed that the formation of the multicomponent crystals of SA increased its equilibrium solubility in water. Ternary phase diagrams (TPDs) of SA–NIA in ethanol were constructed at 20 °C and 30 °C. The results show that as the temperature increases, the preparation region of the pure SA–NIA cocrystal becomes larger, and the shape of the TPD remains unchanged. To further reveal the causes of salt or cocrystal formation, intermolecular interactions were evaluated using the Hirshfeld surface (HS), molecular atomic quantum theory (AIM) and independent gradient model (IGM). The chemical reactivity of molecules was discussed differently using molecular electrostatic potential (MEP) analysis, frontier orbital analysis and global electron reactivity descriptors.
研究领域:
化学
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药学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2018
·Vol. 135
·期 48
·46885
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IF 1.901
Yu Cao,Jiayu Li,Jun Liu,Yuying Tang,Huan Liu,Yan Jiang,Hongwen Zhang
Four inclusion complexes were synthesized from β-cyclodextrin (β-CD) copolymers and potassium sorbate (PSA) using the self-assembly principle. Reactive β-CD monomers carrying unsaturated ester functional groups [β-CD-acryloyl chloride (AC)] were synthesized from β-CD and AC and copolymerized with styrene to obtain β-CD copolymers of the general formula poly(β-CD-AC- co -St). These β-CD copolymers having cavity structures were complexed with PSA to obtain the corresponding inclusion complexes of the general formula poly(β-CD-AC- co -St)/PSA. These complexes were added to the polystyrene (PS) sheets, as an antibacterial additive, to inhibit the adhesion and growth of bacteria on its surface. The chemical and physical structures of copolymers were characterized by Fourier transform infrared, nuclear magnetic resonance, and the slow release performance was investigated using ultraviolet spectroscopy. The results showed that the composition of the copolymers and their molecular weight could be controlled by changing the rate of charge while the rate and the amount of slow release could be controlled by altering the content of β-CD in the copolymer. The PS sheets containing the inclusion complexes exhibited excellent antibacterial activity that significantly reduced the adhesion of yeast and Staphylococcus aureus to its surface. With the increase of the β-CD content in the copolymers, they contained more of PSA and their bacteriostatic property became more pronounced. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46885.
研究领域:
材料科学
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微生物学
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DOI
高影响因子
JOURNAL OF APPLIED MICROBIOLOGY
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2021
·Vol. 130
·期 5
·1456-1465
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IF 3.772
Zhao J.,Tao X.,Wang S.,Li J.,Shao T.
AimsThis study aimed to evaluate the feasibility of sorbic acid (SA) as a silage additive and its effects on fermentation quality and aerobic stability of high dry matter (DM) silage.Methods and ResultsHigh DM rice straw was ensiled with distilled water (C), 1 × 106 CFU per gram fresh weight (FW) Lactobacillus plantarum and 1 × 106 CFU per gram FW Lactobacillus buchneri (LP+LB) or SA for 45 days with a subsequent aerobic stability test. After ensiling, LP+LB silage had the highest lactic acid (LA) content and the lowest pH value, whereas SA silage had the highest DM and water‐soluble carbohydrate (WSC) contents, and the lowest ethanol and ammonia nitrogen (NH3‐N) contents among all silages (P < 0·001). Compared to C silage, SA significantly (P < 0·01) reduced the counts of yeasts but not lactic acid bacteria (LAB). During 6‐day aerobic exposure, the continuous pH increase and LA decrease were observed in C and LP+LB silages, and there was no significant change in pH, DM, NH3‐N and WSC contents of SA silage over the whole aerobic exposure. The SA addition slowed the decline of LA and acetic acid (AA) contents as well as the growth of yeasts and aerobic bacteria under aerobic exposure.ConclusionIn this study, L. buchneri could not function in high DM rice straw silage while SA effectively improved both the fermentation quality and aerobic stability.Significance and Impact of the StudyThe SA was more effective than dual‐purpose inoculants to improve the aerobic stability of high DM rice straw silage. Thus, SA can be served as a potential antifungal additive for silage with high DM.
研究领域:
动物科学
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微生物学
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DOI
高影响因子
MACROMOLECULES
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2022
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IF 6.057
Yujian Liu,Yongyao Lei,Yougen Chen
The current contribution presents the synthesis of poly[oligo(ethylene glycol) sorbate]s (PREGmSs) by the t-Bu-P4-catalyzed group transfer polymerization (GTP) method, their postpolymerization modification at the backbone double bond, and thermoresponsive properties in aqueous solution. Four oligo(ethylene glycol) sorbate monomers (REGmSs), including 2-(2-methoxyethoxy)ethyl sorbate (MeEG2S), 2-(2-(2-methoxyethoxy)ethoxy)ethyl sorbate (MeEG3S), 2-(2-(2-ethoxyethoxy)ethoxy)ethyl sorbate (EtEG3S), and 2-(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)ethyl sorbate (MeEG4S), are newly designed to study the thermoresponsive properties of their related polymers. The t-Bu-P4-catalyzed GTP of REGmS only proceeds in a 1,4-regioselective addition manner to quantitatively produce the backbone trans-rich (ca. 80%) PREGmS. The complete hydrogenation and epoxidation of the backbone double bonds result in hydrogenated and epoxidized polymers (PREGmS-H2 and PREGmS-epoxy, respectively), which have different main-chain structures and rigidity from their parent PREGmS. Given the 1,4-substituted structure of a sorbate monomer, the chemical structure determination of PREGmS-H2 by 13C NMR spectra demonstrates that the above polymers have an erythro-rich (ca. 60%) structure in diastereochemistry and a diisotactic/disyndiotactic ratio around 1:1 in stereoregularity. The thermoresponsive properties of PREGmS, PREGmS-H2, and PREGmS-epoxy in aqueous solutions are studied in detail from various aspects in terms of polymer mass concentration, molecular weight, length and end group of the oligo(ethylene glycol) side chain, and main-chain structure by turbidity, 1H NMR spectroscopy, and dynamic light scattering (DLS) methods, which are discussed below.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
FOOD CHEMISTRY
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2021
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IF 7.514
Wei Jia,Xixuan Wu,Ruiting Li,Shuxing Liu,Lin Shi
Nisin and potassium sorbate as preservatives are used in a broad range of meat. A lipidomic evaluation was performed on Tan sheep meat treated by two types of preservatives. The addition of potassium sorbate resulted in higher lipid losses compared with nisin treatment. Furthermore, 106 significant lipids of 12 lipid classes (PC, PS, LPS, LPC, PE, PI, LPE, TG, Cer, DG, SM, Sph) with variable importance in projection scores greater than 1.0 were detected and qualified to distinguish different preservatives added meat using UHPLC-Q-Orbitrap MS/MS. LOD and LOQ were 0.12–0.32 μg kg −1 and 0.35–0.89 μg kg −1 , indicating high sensitivity and excellent analytical characteristics in the study. Nisin was confirmed to be the better preservative for prolonging the shelf life of Tan sheep meat while reducing the loss of nutrients. These results could provide a strong cornerstone for future research on preservatives in meat products.
研究领域:
食品科学
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动物学
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营养学
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DOI
PubMed
高影响因子
FOOD CONTROL
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2016
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IF 3.388
Changbao Wang,Jie Yang,Xiaoyu Zhu,Yingjian Lu,Yingying Xue,Zhaoxin Lu
Salmonella is an important foodborne pathogen and a serious threat to human health worldwide. This study was to reduce Salmonella and the spoilage bacteria on fresh chilled pork using bacteriophage, nisin, and potassium sorbate (PS) along with their combinations. Microbial, chemical, and sensory qualities of the fresh chilled pork (artificially contaminated with Salmonella 3 log CFU/g) treated with bacteriophage (9 log PFU/g), nisin (5000 IU/g), PS (2 mg/g) and their combinations were evaluated. The result showed that all the samples treated with phage could significantly ( P < 0.05) reduce Salmonella population on fresh chilled pork. The combination treatment of nisin, PS and phage (N-PS-P) could significantly lower total viable counts (TVC), TVB-N and TBARS of the chilled pork during the storage period. The TVC of sample treated by N-PS-P was reduced by 2.3 log CFU/g at 7th day. It was also found through the electronic nose detection that the N-PS-P treatment was able to significantly reduce odour and maintain good sensory of the chilled pork. Hence, the N-PS-P treatment extended the shelf life of fresh chilled pork up to 14 days. No adverse effect of the phage on the chilled pork was observed. In conclusion, this study suggests that the phage and its combination with nisin and PS have great potential to be used as a good preservative for fresh chilled pork.
研究领域:
食品安全
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微生物学
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DOI
高影响因子
FOOD CHEMISTRY
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2018
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IF 4.946
Hossein Mohammadzadeh-Aghdash,Yousef Sohrabi,Ali Mohammadi,Dariush Shanehbandi,Parvin Dehghan,Jafar Ezzati Nazhad Dolatabadi
Cytotoxicity and genotoxicity of sodium acetate (SA), sodium diacetate (SDA), and potassium sorbate (PS) was tested on Human Umbilical Vein Endothelial Cells (HUVEC). Cytotoxicity was investigated by MTT assay and flow cytometry analysis, while genotoxicity was evaluated using DNA fragmentation and DAPI staining assays. The growth of treated HUVECs with various concentrations of SA , SDA and PS decreased in a dose-and time-dependent manner. The IC50 of 487.71, 485.82 and 659.96 µM after 24 h and IC50 of 232.05, 190.19 and 123.95 µM after 48 h of treatment were attained for SA, SDA and PS, respectively. Flow cytometry analysis showed that early and late apoptosis percentage in treated cells was not considerable. Also neither considerable DNA fragmentation nor DNA smear was observed using DAPI staining and DNA ladder assays. Overall, it can be concluded that the aforementioned food additives can be used as safe additives at low concentration in food industry.
研究领域:
毒理学
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食品科学
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细胞生物学
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DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2019
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IF 6.309
Jinyuan Wang,Jian Wu,Yuqing Luo,Yong Zhang,Sharon Guo,Sanshui Pan
Peroxide curing can provide rubber products with good thermal aging resistance, low compression set and light color. But butyl rubber (IIR) and bromobutyl rubber (BIIR) will incur severe main chain degradation when using a peroxide as a curing agent . The presence of 2,2,6,6-tetramethylpiperidinyl- N -oxyl (TEMPO) and in situ formed zinc disorbate (ZDS) in dicumyl peroxide cured BIIR system can inhibit the degradation of BIIR without compromising the curing extent of BIIR vulcanizates. ZDS is grafted on BIIR, while TEMPO functions as a free radical scavenger and nitroxide mediator for the grafting reaction. The in situ formation and grafting reaction of ZDS in BIIR are characterized by FTIR, XRD and NMR spectroscopy. In the presence of TEMPO and ZDS, BIIR does not suffer degradation but exhibits a continuous increase in torque and crosslink density with time during the post-cure period. The presence of TEMPO could effectively improve the thermal stability and aging resistance of BIIR vulcanizates. The study provides an effective route to avoid the degradation and promote the crosslinking of BIIR that can easily incur β -scission when reacting with peroxides.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
FOOD CONTROL
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2021
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IF 5.548
Weibin Ma,Eric T. Johnson
Strategies for preventing the growth of mycotoxigenic fungi in agricultural commodities need to be identified. In this study, sorbaldehyde and ( E , E )-2,4-heptadienal, two natural aldehydes as derivatives of the common food preservative sorbic acid, were investigated for their antifungal efficacy as fumigants against Aspergillus flavus in stored peanut seeds. In vitro assays demonstrated that both sorbaldehyde and ( E , E )-2,4-heptadienal exhibited stronger inhibitory effects on A. flavus than sorbic acid. Moreover, the vapor phase of these two aldehydes were much more effective than direct contact on A. flavus growth. ( E , E )-2,4-Heptadienal showed higher fumigant activity than sorbaldehyde, with 50% effective concentration (EC 50 ) values of 1.5 and 2.6 mg/l air, and minimum inhibitory concentration (MIC) values of 16 and 8 mg/l air, respectively. Furthermore, fumigation with sorbaldehyde or ( E , E )-2,4-heptadienal could significantly reduce and delay A. flavus growth in stored peanut seeds, and the infection was completely inhibited by 100 mg/l air sorbaldehyde or 75 mg/l air ( E , E )-2,4-heptadienal. These results revealed that ( E , E )-2,4-heptadienal, a natural food flavour with better safety than sorbaldehyde, has high potential as an antifungal fumigant for protecting peanut seeds from contamination of A. flavus during storage.
研究领域:
食品科学
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植物保护
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微生物学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）