FOOD CHEMISTRY
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2022
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IF 9.231
Yangyang Xiao,Haibo Tan,Haitao Huang,Jizhong Yu,Lanting Zeng,Yinyin Liao,Ping Wu,Ziyin Yang
Linalool , which is one of the most representative aroma substances in tea, is transformed into other aroma-related compounds, including linalool 3,6-oxides and linalool 3,7-oxides. The objective of this study was to elucidate the linalool oxide synthesis pathway and its response to stress in tea. By feeding experiment, chemical synthesis, and compound analysis, it was found that linalool can be transformed to linalool oxides via 6,7-epoxylinalool. The conversion rate from 6,7-epoxylinalool to linalool oxides was relatively high under acidic conditions. Four linalool oxide glucosides obtained from tea were structurally characterized. Additionally, tea green leafhopper infestation was observed to activate the whole metabolic flow from linalool into linalool oxides and their glucosides ( p < 0.01). Moreover, light treatments further increased the accumulation of linalool oxides and their glucosides ( p < 0.05). These results will be useful for elucidating the mechanism mediating linalool oxides content changes in response to stress in tea.
研究领域:
植物科学
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农业化学
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生物化学
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DOI
PubMed
高影响因子
Foods
·
2022
·Vol. 11
·期 9
·1273
·
IF 5.561
Jie-Qiong Wang,Ying Gao,Dan Long,Jun-Feng Yin,Liang Zeng,Yan-Qun Xu,Yong-Quan Xu
Hydrogen peroxide has a significant effect on the flavor of tea beverages. In this study, the yield of hydrogen peroxide in (–)-epigallocatechin gallate (EGCG) solution was first investigated and found to be significantly enhanced under specific conditions, and the above phenomenon was amplified by the addition of linalool. Then, an aqueous hydrogen peroxide solution was added to a linalool solution and it was found that the concentration of linalool was significantly reduced in the above-reconstituted system. These findings were verified by extending the study system to the whole green tea infusions. The results suggested that the production of hydrogen peroxide in tea beverages may be dominated by catechins, with multiple factors acting synergistically, thereby leading to aroma deterioration and affecting the quality of tea beverages. The above results provided a feasible explanation for the deterioration of flavor quality of green tea beverages with shelf life.Keywords:green tea beverages;EGCG;hydrogen peroxide;linalool;flavor
研究领域:
食品科学
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化学
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饮料技术
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Han Yan,Wei-Xuan Li,Ying-Lin Zhu,Zhi-Yuan Lin,Dan Chen,Yue Zhang,Hai-Peng Lv,Wei-Dong Dai,De-Jiang Ni,Zhi Lin,Yin Zhu
The Fujian and Yunnan provinces in China are the most representative origins of white tea. However, the key differences in the chemical constituents of the two white teas have rarely been revealed. In this study, a comprehensive comparison of the aroma profiles, chiral volatiles, and glycosidically bound volatiles (GBVs) in Fujian and Yunnan white teas was performed, and 174 volatiles and 28 enantiomers, including 22 volatiles and six GBVs, were identified. Linalool, linalyl-β-primeveroside (LinPrim), and α-terpineol presented the opposite dominant configurations in Fujian and Yunnan white teas, and the chiral GBVs were firstly quantified with significant differences in the contents of R -LinPrim and β- d -glucopyranosides of (2 R , 5 R )-linalool oxide A and (2 R , 5 S )-linalool oxide B. Moreover, discrimination functions for Fujian and Yunnan white teas were created using nine key variables with excellent reliability and efficiency. These results provide a new method for objectively distinguishing authentic white teas according to geographical origin.
研究领域:
食品科学
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分析化学
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农业化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Kexin Zhu,Xun Wang,Hao Shi,Fei Wang,Xun Li
Bergamot essential oil has rich biological activity and is commonly applied in fragrance, cosmetics and daily chemical products. However, the entire production process of bergamot fruit from cultivation to extraction of essential oil is inefficient and unstable, cannot meet the growing market demand. To overcome this limitation, we first established a highly efficient biosynthetic platform for production of the major components ((+)-limonene and (-)-linalool) of bergamot essential oil. By increasing the supply of monoterpene precursors and screening for the direct precursors NPP and GPP, a biosynthetic pathway capable of producing both (+)-limonene and (-)-linalool was constructed in Escherichia coli . Then, by screening and mutating the linalool synthase and modifying the limonene synthase by fusion proteins , the obtained strain BW4M42 can produce 277.8 mg/L (+)-limonene and 54.2 mg/L (-)-linalool in shake flasks after optimizing the fermentation culture conditions. In a 1.3-L reactor, the total concentration reached 2688.2 mg/L, including 2010.2 mg/L (+)-limonene and 678 mg/L (-)-linalool. The (-)-linalool/(+)-limonene ratio produced by the strain BW4M42 meets the ISO 3520:2022 standard for bergamot essential oil. This study provides the possibility to construct a biosynthetic platform for producing the major components of plant essential oils through metabolic engineering .
研究领域:
生物化学
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合成生物学
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微生物学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Rongrong He,Weijun Chen,Qiuping Zhong,Ming Zhang,Jianfei Pei,Wenxue Chen,Haiming Chen
This study aimed to prepare sodium alginate-linalool emulsion (SA-LE) to overcome the low solubility of linalool and explore its inhibitory activity against Shigella sonnei . The results indicated that linalool significantly reduced the interfacial tension between SA and oil phase ( p < 0.05). Droplet sizes of fresh emulsions were uniform with sizes from 2.54 to 2.58 μm. The ζ-potential was between −23.94 and -25.03 mV, and the viscosity distribution was 973.62 to 981.03 mPa·s at pH 5–8 (near neutral pH) without significant difference. In addition, linalool could be effectively released from SA-LE in accordance with the Peppas-Sahlin model, mainly described by Fickian diffusion. In particular, SA-LE can inhibit S. sonnei with a minimum inhibitory concentration of 3 mL/L, which was lower than free linalool. The mechanism can be described as damaging the membrane structure and inhibiting respiratory metabolism accompanied by oxidative stress based on FESEM, SDH activity, ATP and ROS content. These results suggest that SA is an effective encapsulation strategy to enhance the stability of linalool and its inhibitory effect on S. sonnei at near neutral pH. Moreover, the prepared SA-LE has the potential to be developed as a natural antibacterial agent to address the growing food safety challenges.
研究领域:
食品科学
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微生物学
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药剂学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
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IF 2
Jian Hong,Qiang Wang,Biao Liu,Tao Li,Dingkai Hu,Furqan Muhammad
Isothermal vapor–liquid equilibrium (VLE) data for valuable and thermally sensitive lavender essential oil systems, linalool + linalyl acetate, linalool + α-terpineol, and α-terpineol + linalyl acetate, were determined at 363.15, 378.15, and 393.15 K, respectively, by utilizing headspace gas chromatography (HSGC). The Wilson, NRTL, and UNIQUAC models were used to regressively fit experimental VLE data, demonstrating satisfactory agreement between the models and data. The vapor compositions were analyzed at different temperatures using the Wilson, NRTL, and UNIQUAC models, and the maximum absolute average deviation (AAD) values were 0.72, 0.78, and 0.80%, respectively, and the highest mean relative deviation (MRD) among these three models was 1.62, 1.57, and 1.65%, respectively. Furthermore, AMS software acquired the optimum intermolecular spatial arrangement and binding energy.
研究领域:
化学工程
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分析化学
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精油
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DOI
高影响因子
FISH PHYSIOLOGY AND BIOCHEMISTRY
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2025
·Vol. 51
·期 3
·1-20
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IF 2.5
Cao Jie,Guo Meijie,Wang Jinfeng,Mei Jun,Xie Jing
Plant-based essential oils have been considered to be used as fish anesthetics and as suitable alternatives to synthetic anesthetics. In this study, we evaluated the effect of Cinnamomum camphora var. linaloofera Fujita essential oil (CFEO), MS-222 and linalool on anesthetic induction and recovery of spotted seabass, Lateolabrax maculatus , and verified their sedative effects during simulated transportation. A total of 198 live spotted seabass samples were subjected to various concentrations of MS-222, CFEO, and linalool: 10, 20, 30, 50, 100, 150, and 200 mg L −1 , individually, to evaluate the anesthetic induction time. MS-222, CFEO, and linalool all showed a deep sedation in spotted seabass at 20 mg L −1 . The minimum concentration required to achieve profound anesthesia in spotted seabass was found to be 50 mg L −1 MS-222, 100 mg L −1 CFEO, and 50 mg L −1 linalool, respectively. In addition, 120 healthy spotted seabass (400 g ± 3.5 g) were randomly divided into four groups, which were tranquilized by 20 mg L −1 CFEO, linalool, and MS-222, and the control fish were kept in clean seawater without anesthetics and essential oils. Then, the spotted seabass was simulated to be transported in a vibrating conveyor under 100 rpm at 12 °C for 24 h. The results showed that the fish transported with MS-222 and CFEO showed lower expressions in cytokine (tumor necrosis factor-α, interleukin-6, and interleukin-1 beta) compared to fish transported with linalool. Sedation with linalool reduced oxidative stress (higher superoxide dismutase, catalase, and glutathione peroxidase activities) in transport compared to the control but did not prevent changes in the activities of heat shock protein. In general, the efficacy of CFEO in anesthetizing and sedating spotted seabass and mitigating transport stress was as good as or better than that of MS-222, demonstrating it has the potential to be used as a new and natural sedation for spotted seabass during transport.
研究领域:
水产养殖学
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药理学
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环境生物学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
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IF 5.162
Shuifang Mao,Xiaoli Liu,Wenshui Xia
In this study, chitosan oligosaccharide (COS) was modified by grafting Linalool (Lin) on its backbone to improve its anti-inflammatory activity. By changing the molar ratios of COS to Lin, three different degrees of substitution COS-g-Lin1-3 were prepared. The degrees of substitution of derivatives were 0.65, 0.80 and 1.14 respectively. The structure of COS-g-Lin1-3 were characterized by UV–vis, FT-IR, 1 H NMR and elemental analysis in order to show the COS-g-Lin1-3 successfully synthesized. Besides, the thermal stability , solubility, pH stability as well as crystallinity were also investigated. The results revealed that the derivatives exhibited higher thermal stability and more remarkable anti-inflammatory property against hyaluronidase and collagenase than that of COS. The good biocompatibility made this novel material a promising and effective compound for anti-inflammatory applications.
研究领域:
药学
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材料科学
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生物技术
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2016
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IF 2.196
Li Wan,Hengde Li,Cheng Huang,Yuqing Feng,Guoqiang Chu,Yuying Zheng,Wei Tan,Yanlin Qin,Dalei Sun,Yanxiong Fang
Linalool and geraniol are the primary components of rose oil, palmarosa oil, and citronella oil and many other essential oils, and two important compounds used in the flavour and fragrance, cosmetic or pharmaceutical industries. Phase equilibria (LLE, VLE, solubility, etc. ) and related thermodynamic properties of a mixture are essential in the processes design and control of mass transfer process. In this work, experimental (liquid + liquid) equilibria data of the systems (water + 1-propanl + linalool) and (water + 1-propanl + geraniol) are presented. The (liquid + liquid) equilibria of both systems were determined with a tie-line method at T = (283.15, 298.15 and 313.15) K under atmospheric pressure. The well-known Hand, Bachman and Othmer–Tobias equations were used to test the reliability of the experimental values. The influence of the temperature on the (liquid + liquid) phase equilibria of the mixtures, the binodal curves and distribution ratios of 1-propanl are shown and discussed. Moreover, the NRTL and UNIQUAC models were applied to fit the data for both ternary systems. The interaction parameters obtained from both models successfully correlated the equilibrium compositions. Furthermore, the ternary systems could be represented using the binary parameters of the thermodynamic model with a function of temperature.
研究领域:
化学工程
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热力学
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DOI
高影响因子
Plants-Basel
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2024
·Vol. 13
·期 20
·2946
·
IF 4
Jiuying Li,Yinghui Zhu,Lanlan Sun,Hongle Xu,Wangcang Su,Fei Xue,Chuantao Lu,Wenwei Tang,Renhai Wu
Fenoxaprop-P-ethyl (FE) can effectively control weeds in rice fields, but it has been found to cause phytotoxicity in rice. In this study, the phytotoxicity of FE was mitigated by perilla leaf essential oil (PEO) in rice seedlings. The injury recovery rates (IRRs) for shoot length and fresh weight treated with 800 mg/L of PEO were 101.51% and 99.05%, respectively. Moreover, the damage ofs-metolachlor and pretilachlor was also alleviated when co-applied with 800 mg/L PEO; the IRR ofs-metolachlor phytotoxicity was 26.07% and 27.34%, respectively, and the IRR of pretilachlor phytotoxicity was 127.27% and 124.39%, respectively. However, PEO had no significant effect on the phytotoxicity of pinoxaden, mesotrione, penoxsulam, mesosulfuron-methyl, and nicosulfuron. The results of GC–MS analysis showed that a total of 23 components were detected in PEO, among which linalool (36.49%), linalyl formate (26.96%), α-terpineol (10.63%), 2-hexanoylfuran (5.81%), geranyl acetate (4.13%), and neryl acetate (2.30%) were the primary components. Among them, 2-hexanoylfuran was the most effective component to alleviate FE damage, for which the IRR of shoot length and fresh weight was 73.17% and 73.02%, respectively, followed by the geranyl acetate, for which the IRR was 72.32% and 60.56%, respectively, and neryl acetate, for which the IRR was 65.28% and 58.11%, respectively. Furthermore, the application of 50 mg/L of 2-hexanofuran significantly improved the tolerance of shoot length and fresh weight to FE stress by factors of 5.32 and 5.35, respectively. This research demonstrates that PEO and 2-hexanoylfuran have the potential to serve as natural safeners to reduce phytotoxicity.
研究领域:
农业科学
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植物生理学
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植物化学
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产品关联
DOI
PubMed
高影响因子
Insects
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2025
·Vol. 16
·期 9
·961
·
IF 2.9
Huiman Zhang,Lele Sun,Peng Wang,Jiaoxin Xie,Yuan Guo
Simple SummaryAs a native species in China; the survival and reproduction ofApis cerana ceranaare heavily dependent on chemical signals. In the process of chemical communication, the antennae of bees serve as the primary sensing organs, and the legs also play an important role in the reception and transmission of chemical signals. In our study, scanning electron microscopy (SEM) was used to observe its legs, revealing two types of sensilla, and the ultrastructure of the tibial spur and the antennal brush was observed. The electrophysiological responses of the legs (ELG), along with Y-tube behavioral assays, were employed to validate the involvement of the bee’s legs in olfactory perception. The legs of bees at different ages showed varying degrees of significant response to nonanal and ocimene. Notably, 10-day-old bees exhibited a clear preference for nonanal and ocimene. These findings contribute to a deeper understanding of the mechanistic role of the honeybee leg in chemical signal detection, elucidating their functional characteristics in chemical communication, and providing experimental evidence for the study of bee behavioral responses and environmental adaptation.Apis cerana ceranais a key social insect, and its ability to recognize chemical signals is crucial for maintaining colony homeostasis and coordinating collective behaviors, such as foraging, nursing, and defense. The legs of insects play a significant role in gustatory perception and proximity olfactory perception. In this study, the leg sensilla ofA. c. ceranawere observed by scanning electron microscopy (SEM). Two types of sensilla were observed, including sensilla trichodea (Str I, Str II, Str III, Str IV, Str V, and Str VI) and sensilla chaetica (Sch I, Sch II, and Sch III). The two unique structures of the tibial spur (Tsp I, Tsp II) and antennal brush (Abr) are carefully observed. The electrophysiological responses of workers at different ages to diverse chemical compounds were measured via electrolegogram (ELG) recordings on their legs. The results showed that 1-day-oldA. c. ceranawas more sensitive to nonanal; 10-day-old and 25-day-oldA. c. ceranawere more sensitive to ocimene. The results of behavioral responses showed that nonanal and ocimene can significantly attract 10-day-old workers ofA. c. cerana. This study establishes a foundation for further exploration of the mechanisms by which the legs ofA. c. ceranafacilitate colony-level communication through chemical signals. It also provides an important theoretical basis for understanding their social organization and information transmission.
研究领域:
昆虫学
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神经行为学
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化学生态学
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感觉生物学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Xuerong Luo,Wenting Shi,Imran Mahmood Khan,Lin Yue,Zhouping Wang
As an essential oil component, farnesol (Far) possesses biological activity. Nevertheless, its high hydrophobicity and volatility pose significant limitations to its practical application. Hydroxypropyl chitosan (HPCS) is a modified chitosan characterized by excellent solubility and a wealth of reactive groups. In this study, we used HPCS as the primary matrix to improve the stability and solubility of Far through chemical modification and physical loading. Subsequently, we comparatively analyzed the thermal stability, antioxidant activity and antibacterial activity of the two products. The derivatives (HPCS-Far-1–3) and nanoparticles (HPCS NPs, HPCS-Far NPs) were fabricated by bromide-mediated nucleophilic substitution and ionic gelation methods, respectively. The comparative analysis of these two derivatives presented potent antibacterial and antioxidant properties along with better solubility and thermal stability. This study is the first to compare the complex properties between chemical modification and physical loading, which offers valuable insight for the application of Far in different scenarios.
研究领域:
生物化学
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材料科学
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药学
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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）