PACKAGING TECHNOLOGY AND SCIENCE
·
2017
·Vol. 30
·期 9
·587-600
·
IF 1.32
Haili Wang,Chunxiang Yang,Jing Wang,Mo Chen,Donglei Luan,Li Li
Various studies have provided information on active packaging to prevent food putrefaction effectively . In this work, ethylene–vinyl alcohol copolymer (EVOH) films with geraniol (Ger) and α-terpilenol (Ter) were successfully prepared by extrusion. The mechanical, thermal, oxygen barrier and antimicrobial properties of the packaging films were characterized, and the application of the films in snakehead preservation was examined. Thermogravimetric analysis showed that the addition of Ger and Ter did not decrease the films properties but improved their oxygen barrier property and thermostability. Moreover, the incorporation of Ger and Ter inhibited the growth of Escherichia coli , Salmonella enterica and Listeria monocytogenes . Both of the films, EVOH/Ger (EVOH/Ger) and EVOH/Ter (EVOH/Ter), reduced Salmonella enterica by 2.36 ± 0.17 and 1.91 ± 0.06 log units, respectively. Meanwhile, the effects of EVOH/Ger and EVOH/Ter on quality assessment of snakehead slices were examined through sensory tests and analyses of biochemical indices during refrigerated storage (4°C ± 1°C) for 10 days. Sensory properties, total viable counts, total volatile basic nitrogen, thiobarbituric acid and pH values were evaluated. On eight day, compared with the control fish samples, the total viable counts and total volatile basic nitrogen values cut down 1.98 ± 0.02 log units and 11.3 ± 0.11 mgN/100 g, respectively, for fish samples packaged by EVOH/Ger. The active films containing 6% (wt) Ger and 6% (wt) Ter inhibited the growth of E. coli , S. enterica and L. monocytogenes and effectively extended shelf life by 4–5 days under cold-storage conditions compared with the control group. Copyright © 2017 John Wiley & Sons, Ltd.
研究领域:
食品科学
·
包装工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jun Lin,Yile Du,Xiaoxiao Ma,Yutong Li,Huidong Xie,Yabing Qi,Sijing Zhang
Carbon aerogel prepared using waste biomass as the carbon source can be utilized as the ideal absorption material for the remediation of oil spill accidents. However, the brittleness of the fiber and agglomeration of precursor fiber chains due to hydrogen bonding leads to poor mechanical properties and low absorption capacity of the carbon aerogel. The doping treatment used to overcome such defects still shows some deficiencies, such as high cost, cumbersome process, and part of the process involving toxicity. To overcome the agglomeration between the cellulose chains, a chemically-etched biomass-based carbon aerogel (EBCA) was prepared using pineapple cellulose nanofiber (CNF) etched by the deep eutectic solvents (DES) of choline chloride/urea under a low carbonization temperature of 400 °C. The as-prepared material, designated as EBCA-400, possesses a 3D structure with a huge BET specific surface area of 501.56 m 2 g −1 , a density of only 0.032 g cm −3 and a porosity of 97.3% with excellent elasticity performance and self-recovery performance owing to the enhancement of the surface roughness of fibers through DES etching. Also, EBCA-400 shows a superhydrophobicity with a water contact angle (WCA) of 157.6° and has a strong and fast absorption capacity for various oils in various scenarios, the absorption capacity for CCl 4 reaches 288 times its own weight, and the absorption efficiency to CCl 4 can still reach more than 97% of the maximum value even after 15 oil absorption-removal cycles. With the characteristics of very low density, huge porosity, excellent elasticity and superhydrophobicity as well as better reusability, EBCA-400 has great potential in oil spill remediation. This study provides a convenient and environment-friendly way for surface modification to improve the elasticity of carbon aerogel, which is crucial to the recovery of carbon aerogel for its reusability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ATMOSPHERIC ENVIRONMENT
·
2020
·
IF 4.039
Fenghua Li,Shanshan Tang,Narcisse T. Tsona,Lin Du
Kinetics and mechanism of α-terpineol oxidation by OH radicals were studied in the aqueous phase under acidic condition, and the optical properties of the reaction products were examined. Using the relative rate method, the rate constant of α-terpineol reaction with OH radicals was determined to be (1.3 ± 0.3) × 10 10 M −1 s −1 . The reaction products were analyzed by gas chromatography-mass spectrometry (GC-MS) and the reaction mechanism was proposed. The absorbance changes of the products were monitored by a UV–vis spectrophotometer, and α,β-unsaturated ketone compounds were observed. A certain distribution of α-terpineol in the aqueous phase has the potential to be conducive to the formation of aqueous secondary organic aerosols. At the same time, in order to investigate the persistence of α-terpineol in the atmosphere, its lifetime towards reaction with OH in atmospheric water was determined to be 6.2 h and 1.0 h in urban and remote area, respectively.
研究领域:
大气化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Yingjie Luo,Junjie Qiu,Qiwei Xu,Jing Wei,Hang Song,Beibei Guo,Xuesong Liu,Yong Chen,Tengfei Xu
α-Terpineol and 1,8-cineole are two important compounds in essential oils. This study developed an efficient method to recover α-terpineol from model oil (MO) based on association extraction by in situ formations of deep eutectic solvent (DES) between α-terpineol and some quaternary ammonium salts (QASs) by hydrogen-bond (HB) interaction. Such interaction could be broken almost completely by the introduction of water, due to the stronger HB interaction between water and QASs, which could release α-terpineol by liquid-liquid separation and save the organic solvents consumption. QASs were screened by gaussian energy calculation and experimental verification. Subsequently, the effect of physicochemical properties of the quaternary ammonium salts on the weak interaction between QASs and α-Terpineol was also screened using random forests model. Tetrabutylammonium chloride (TBAC) was proved to form DES with α-terpineol but not with 1,8-cineole, which was proved by FT-IR and 1 H nuclear magnetic resonance ( 1 H NMR) spectroscopy. After response surface methodology (RSM) and Genetic Algorithm-Back Propagation (GA-BP) neural network optimization, the distribution ratio and selectivity of α-terpineol to 1,8-cineole could reach a high value of 29.6 and 42.2. The α-terpineol could achieve a purity up to 99.6% with a recovery of 88.8% by the two-step back-extractions using n -hexane and water. Furthermore, camphor leaf essential oil was used to demonstrate the reliability of the method for further application. In this separation process, all reagents including organic salt, n -hexane and water could be recovered and reused. It provides an alternative and promising method for the economical and green treatment of essential oils.
研究领域:
化学工程
·
分析化学
·
人工智能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2024
·
IF 7
Rong Liu,Lingxuan Huang,Xuan Feng,Di Wang,Rasika Gunarathne,QingJun Kong,Jun Lu,Xueyan Ren
Aspergillus carbonarius , a common food-contaminating fungus, produces ochratoxin A (OTA) and poses a risk to human health. This study aimed to assess the inhibitory activity of tea tree essential oil and its main components, Terpene-4-ol (T4), α-terpineol (αS), and 3-carene (3C) against A. carbonarius . The study showed αS and T4 were the main antifungal components of tea tree essential oil, which primarily inhibit A. carbonarius growth through cell membrane disruption, reducing antioxidant enzyme activities (catalase, peroxidase, superoxide dismutase) and interrupting the tricarboxylic acid cycle. Furthermore, αS and T4 interacted with enzymes related to OTA biosynthesis. Molecular docking and molecular dynamics show that they bound mainly to P450 with a minimum binding energy of −7.232 kcal/mol, we infered that blocking the synthesis of OTA precursor OTβ. Our hypothesis was preliminarily verified by the detection of key substances in the OTA synthesis pathway. The results of UHPLC-QTOF-MS 2 analysis demonstrated that T4 achieved a degradation rate of 43 % for OTA, while αS reached 29.6 %, resulting in final breakdown products such as OTα and phenylalanine. These results indicated that α-terpinol and Terpene-4-ol have the potential to be used as naturally safe and efficient preservatives or active packaging to prevent OTA contamination.
研究领域:
食品科学
·
微生物学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 4
·942
·
IF 3.1
Hao Zhang,Zhaozhou Wei,Deyuan Xiong,Yao Wu,Menglong Tong,Huiping Su,Zuoyuan Zhang,Jian Liao
Using sodium lignosulfonate as feedstock, ZnCl2and NaHCO3co-activated the hierarchical porous carbons (HPCs) were prepared by one-pot pyrolysis with different NaHCO3dosages (0–4 g) and carbonization temperatures (400–600 °C). Subsequently, phosphotungstate (HPW) was supported with the resulting biochar for the α-pinene hydration reaction to produce α-terpineol. The optimum preparation conditions were determined according to the yield of α-terpineol. The formation mechanism and physicochemical properties of HPCs were analyzed through TG, SEM, XPS, XRD, FT-IR, and N2adsorption–desorption isotherms. The results demonstrated that NaHCO3underwent a two-step reaction which liberated a substantial quantity of CO2, thereby enhancing activated carbon’s macroporous and mesoporous structures. Simultaneously, NaHCO3mitigated strong acid gas (HCl) emissions during ZnCl2activation. Compared with AC450-4:8:0 prepared by ZnCl2activation alone, the total pore volume of AC450-4:8:2 prepared by co-activation is increased from 0.595 mL/g to 0.754 mL/g and the mesopore rate from 47.7% to 77.8%, which is conducive to reducing the steric hindrance of the hydration reaction and improving the selectivity. Hydration experiments show that the selectivity of α-terpineol is 55.7% under HPW/AC450-4:8:2 catalysis, higher than 31.0% for HPW and 47.4% for HPW/AC450-4:8:0.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD SCIENCE
·
2022
·Vol. 87
·期 10
·4609-4621
·
IF 3.693
Chuan Cao,Changyue Deng,Jinwei Hu,Yibin Zhou
In the present study, the formation and structure of the inclusion compound of large-ring cyclodextrin and 4-terpineol were obtained through different experiments and molecular dynamics (MD) simulation. The analysis of FTIR, 1 H-NMR, and thermodynamic results confirmed the formation of clathrates. Analysis of molecular structure (root-mean-square deviation and radius of gyration), solubility, and interaction energy (Coul, H bond) based on MD simulations further clarified the nature of the clathrate and the conformational changes caused by guest molecules as well as inclusion complexes process trends. The inclusion complex reportedly has a new crystal structure with improved thermal stability. Practical Application This is the first work to demonstrate the complex formation between 4-terpineol and large-ring cyclodextrin by molecular dynamics simulation. Molecular dynamics simulation confirmed the formation of inclusion complexes theoretically. Conformational changes of the molecules and the formation of complexes with improved thermal stability were observed. Complexing with large-ring cyclodextrin can be used as an effective means to encapsulate the aroma/flavor compounds.
研究领域:
食品科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Annals of Translational Medicine
·
2021
·
IF 3.932
Xiangrui Meng,Yuanyuan Sun,Lan Wang,Yuhao Li,Ruizhuo Ouyang,Ping Yuan,Yuqing Miao
Background Under hypoxic conditions, the brain can undergo irreversible damage. The present study aimed to explore new higher-oxygen-content carbamide peroxide (CP) compounds and the effect of their oxygen-releasing property on human brain microvascular endothelial cell (EC) proliferation under in vitro hypoxic conditions. Methods Two different additives including alpha-terpineol and sorbic acid were added to the reaction system to obtain the carbamide peroxide of CP-I and CP-II. Results We evaluated the oxygen generation capabilities of CP samples by using a portable dissolved oxygen meter. Consequently, alpha-terpineol as a stabilizer exhibited a unique effect on the oxygen generation of CP. CP-I was uniquely able to promote cell proliferation ability at 10 µg·L −1 for hypoxic conditions, with the proliferation rates being 36.2% compared with the control group. The safety of CP to cells was further verified by calcein-AM/PI staining. Under hypoxic conditions, CP-I at 10 µg·L −1 promoted the migration rate, and the migration rate being 32.37%. Conclusions These compounds have the advantages of simple synthesis, long storage time, low cost, and rich oxygen content. Used spectrophotometry, oxygen electrode test, and indicator titration for testing the oxygen production rate and oxygen production. The results indicate that alpha-terpineol is the best additive. CP-I exhibited the highest oxygen content and a superior effect on the cell phenotype than CP-II, especially under hypoxia. This study is the first to report the effects of CP on cells, and provides new therapeutic insights into cerebrovascular injury repair.
研究领域:
神经生物学
·
细胞生物学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Separations
·
2022
·Vol. 10
·期 1
·1
·
IF 3.344
Xian Zhang,Luyun Zhang,Dan Zheng,Zhenzhen Xia,Maomin Peng,Danling Sun,Xizhou Hu,Xitian Peng
In the current study, an effective and simple procedure of extraction for the four benzophenone compounds from water samples was achieved by dispersive liquid–liquid microextraction (DLLME) based on the solidification of floating organic droplets (SFO) with a natural monoterpene enol as the extractant. As a natural, high solidification point, inexpensive, and environmentally friendly hydrophobic solvent, α−terpineol was selected firstly as an extractant for DLLME and could be collected and transferred easily after extraction by solidification at a lower temperature. Several main parameters closely related to extraction efficiencies, such as volume of extractant, extraction time, pH and salt concentration of the sample solution, temperature, and time of the solidification process, were investigated in detail. The results showed that the established method had good extraction performance for benzophenone compounds with enrichment factors in the range of 29–47. Furthermore, the linearities were over the range of 2–2000 µg/L, and the limits of detection were 0.12–0.53 µg/L for four benzophenone compounds. The recoveries ranged from 80.2% to 108.4%, with RSDs (intra- and inter-assay) less than 8.5%. At last, the method applicability was investigated by the determination of the benzophenone compounds in aqueous solutions, and satisfactory recoveries (83.0–107.0%) were acquired. Taken together, α−terpineol, a natural monoterpene enol, was first used as an extractant of DLLME-SFO, which provided an alternative method with simplicity and rapidity for the determination of benzophenone compounds in aqueous samples.Keywords:α−terpineol;dispersive liquid–liquid microextraction (DLLME);solidification of floating organic droplet (SFO);benzophenone compounds
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2020
·
IF 3.795
Yumeng Chen,Hua Li,Dongxia Feng,Xiong Tong,Shunxuan Hu,Fan Yang,Guichao Wang
Salicylhydroxamic acid (SHA) has been widely used as collector in cassiterite flotation, and α-terpineol (AT) and methyl isobutyl carbinol (MIBC) are common frothers in mineral flotation. The effects of AT and MIBC on cassiterite flotation have rarely been reported, which severely limits our understandings of the role of frother in cassiterite flotation. Here, comparative studies between AT and MIBC in affecting cassiterite flotation using SHA as collector were conducted through micro-flotation tests. Micro-flotation tests showed that the averaged value of the recovery of cassiterite with AT was 10% higher than that with MIBC at the same concentration. To unveil the mechanisms of enhancement effects of AT on the flotation of fine cassiterite particles, zeta potential measurements, contact angle measurements and surface tension measurements were conducted. Zeta potential of cassiterite surface shifted to more negative value in the presence of SHA, and the nonionic reagents, AT and MIBC, could not affect the surface potential of cassiterite. Contact angle measurements showed AT could adsorb on the surfaces of cassiterite particles, and therefore the hydrophobicity of particles was increased. In addition, there was a synergistic behavior between SHA and AT on cassiterite surface due to co-adsorption, and the cassiterite surface was more hydrophobic in the SHA/AT solution. Less surface tension and smaller bubble size were obtained in the SHA/AT solution compared to SHA/MIBC solution. These two combining effects, i.e. increasing the hydrophobicity of cassiterite particles and reducing the single bubble size, are beneficial to the flotation of cassiterite, which explains higher recoveries in cassiterite flotation when AT is used as frother and SHA as collector.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Yinqiao Liu,Jialu Han,Wensheng Yan,Qiuran Jiang,Jiamei Luo,Liying Zhang,Jun Wang,Wanshuang Liu
Growing environmental concerns are driving the development of bio-based and recyclable thermosetting polymers. In this work, we synthesized a novel liquid cycloaliphatic epoxide containing silyl ether bonds from α-terpineol, a renewable monoterpene alcohol. After optimizing the accelerator content, the epoxy resin cured with methylhexahydrophthalic anhydride exhibited a high glass transition temperature (172 °C) and an acceptable tensile strength (57.2 MPa), the presence of silyl ether bonds imparts the resin with inherent degradability in fluoride and acidic organic solutions, offering a pathway for recycling. Finally, the optimized epoxy system was used to prepare a thermally conductive adhesive with boron nitride (BN) as the filler. The resulting epoxy composite 35 wt% BN, exhibited an enhanced thermal conductivity of 1.298 W/m·K. Crucially, the high-value BN fillers could be recovered non-destructively through selective chemical recycling of the epoxy matrix.
研究领域:
高分子科学
·
材料工程
·
环境化学
·
胶粘剂技术
✓ 已验证
产品关联
DOI
高影响因子
Microbiology Spectrum
·
2025
·
IF 3.8
Yuhan Yang,Panjie Hu,Yanchun Gong,Zeyong Zhong,Yichi Zhang,Fan Ye,Tieli Zhou,Jianming Cao,Zhongyong Wang
Multidrug-resistant gram-negative bacteria (GNB) have posed a serious public health hazard worldwide. Colistin (COL), the ultimate therapeutic option for treating GNB infections, has had escalating resistance rates concomitant with increased utilization. In this study, we attempted to increase the sensitivity to COL using a plant extract, α-terpineol (α-TP). Checkerboard and time-kill assays indicated that the combination of COL and α-TP exhibited pronounced synergistic antimicrobial effects against colistin-resistant (COL-R) GNB in vitro. Biofilm assessments revealed that COL combined with α-TP effectively inhibited biofilm development and eliminated established biofilms. Scanning electron microscopy indicated substantial disruption of bacterial cell membranes after 6 h of combined treatment. Additionally, cytotoxicity and erythrocyte hemolysis assays confirmed that α-TP maintained a degree of safety at synergistic concentrations. Mechanistically, the combination of COL and α-TP promoted the accumulation of reactive oxygen species and enhanced the permeability of both the inner and outer bacterial membranes. This study demonstrated that α-TP can restore the sensitivity of COL-R GNB to COL when used in combination.
研究领域:
微生物学
·
感染病学
·
抗菌药物研究
·
药理学
·
分子生物学
·
转化医学
·
耐药机制研究
✓ 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）