INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Shufen Wang,Jinrou Wei,Hongzhao Xie,Xiaopeng Chen,Jie zhen Liang,Xiaojie Wei,Jie Huang,Linlin Wang
The phase equilibrium relationships of resin systems are indispensable for resin tapping, distillation, and investigating the release of terpenes in biogenic volatile organic compounds (BVOCs). Herein, we obtained the vapor–liquid equilibrium (VLE) data of monoterpene-sesquiterpene systems that contain resin acid by a headspace gas chromatography (HS-GC). There is no azeotropic behavior between terpenes, and abietic acid was found to inhibit the volatilization and separation of terpenes. Furthermore, the saturated vapor pressure of the systems almost triples when the experimental temperature increases from 313.15 to 333.15 K, which may exacerbate terpene emissions in ecosystems. Additionally, the thermodynamic consistency of the VLE values was confirmed by van Ness test, and the experimental data were correlated using NRTL, UNIQUAC, and Wilson activity coefficient models, while the Conductor-like Screening Model for Real Solvents (COSMO-RS) model was utilized for predictions. All of the data satisfy thermodynamic consistency, and the correlation results and prediction results demonstrate good adherence of the activity coefficient models to experimental values and the positive capacity of COSMO-RS in predicting the VLE relationship for the pine resin systems, respectively.
研究领域:
生态学
·
化学工程
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
Forests
·
2022
·Vol. 13
·期 2
·283
·
IF 3.282
Yini Zhang,Xianyin Ding,Qifu Luan,Jingmin Jiang,Shu Diao
Diterpene resin acids (DRAs) are major components of pine oleoresin that can effectively resist the invasion of insects and pathogenic microorganisms. The subfamily of cytochrome P450s, CYP720B, catalyzes diterpene products into DRAs. Identifying CYP720B subfamily members and revealing the characteristics of tissue-specific expression would help understand diterpene-rich structures and diverse types. Slash pine and loblolly pine are important pines that provide oleoresin products. In this study, we identifiedCYP720Bcandidate genes based on thePinus taedaV2.0 genome and full-length transcriptome of slash pine by PacBio. A total of 17 genes in slash pine and 19 in loblolly pine were identified and classified into four main clades by phylogenetic analysis. An analysis ofcis-acting elements showed thatCYP720Bgenes were closely related to adversity resistance. The gene expression of these candidates in different tissues was quantified by real-time quantitative PCR (RT–qPCR) analysis. Most of the genes showed relatively higher expression levels in roots and stems than in the other tissues, corresponding with the results of DRA component detection by gas chromatography–mass spectrometry (GC–MS), which indicated that stems and roots might be important tissues in oleoresin biosynthesis. These results provide a valuable resource for a better understanding of the biological role of individual CYP720Bs in slash pine and loblolly pine.Keywords:diterpene resin acids;CYP720B;expression patterns;biotic and abiotic stress
研究领域:
植物学
·
分子生物学
✓ 已验证
DOI
高影响因子
Food Bioscience
·
2025
·
IF 5.9
Zhuo Xu,Bin Wu,Chunhua Wu,Qian Chen,Kaimeng Xu,Zhengjun Shi,Xiaoping Rao,Yanfei Niu
In order to obtain natural bio-antimicrobial agents with better antifungal activity, the present study compared the antifungal properties of different structural natural resin acid derivatives (dehydroabietic acid (DHA), acrylpimaric acid (APA), and maleopimaric anhydride (MPA)) grafted with chitosan C 2 -OH and investigated the relationship between structure and activity. The structures of the derivatives were determined by FTIR and 1 H NMR. The antifungal properties were determined by mycelial growth rate method. The results demonstrated that CS-DHA (CSDA) exhibited the capacity to inhibit the majority of the tested fungi with notable efficacy, with an optimal antifungal effect observed at 97.53% against Alternaria solani . CS-APA (CSAA) demonstrated a comparatively weaker antifungal effect in comparison to CSDA, yet it exhibited a stronger effect when compared to CS-MPA (CSMA). SEM, TEM and relative permeability of cell membranes proved that the derivatives inhibited fungal growth by destroying the cell wall structure. The in vivo experiments proved that the derivatives all have the effect of protecting chili peppers, which has some application prospects. The best curative effect of CSAA on chili was observed at 1.5 mg/mL concentration (21.04%). At 3 mg/mL concentration, CSDA showed the best protective effect (29.48%) against chili peppers, which was closest to the effect of Imazalil at the same concentration. Meanwhile, the three derivatives had good preservation effect on cherry tomatoes, and the longest one could extend the shelf life by 6 days.
研究领域:
食品科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Jiaojiao Zhang,Feng Nan,Hongchao Yu,Shaomeng Zhang,XiaoQi Xia,Qigu Huang,Jianjun Yi,Hongming Li,Zhong Zhao
This study reported novel eco-friendly Ziegler–Natta catalysts containing bioderived maleic rosinate tri-n-butyl and maleic rosinate tri-n-octyl as internal electron donors for propylene polymerization to obtain transparent isotactic polypropylene. Surprisingly, on the one hand, rosin acid esters can function as internal electron donors to improve the stereoselectivity of the catalyst where the isotacticity of polypropylene obtained reaches 97.85%. On the other hand, they act as nucleating agents to greatly improve the transparency of polypropylene, with a light transmittance of 93.8% and haze of 4.4%, due to internal electron donors evenly dispersed on the surface of the catalyst particles. Furthermore, the catalysts were used to carry out propylene polymerization and showed the highest catalytic activity value of 31.9 kgPP·gCat–1·h–1.
研究领域:
高分子科学
·
催化
·
材料科学
·
环境化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Shufen Wang,Xiaopeng Chen,Jiezhen Liang,Xiaojie Wei,Hairong Mo,Kaixi Deng,Linlin Wang
Investigating phase equilibrium on the terpenoid of the pine oleoresin system is of great importance for the usage relevant to the oleoresin. Herein, the binary and ternary isothermal vapor–liquid equilibrium (VLE) of α-pinene, longifolene, and abietic acid (three main components of oleoresin) at 313.15, 323.15, and 333.15 K were measured by headspace gas chromatography (HS-GC). There was no azeotropic behavior observed of α-pinene and longifolene. Abietic acid’s influence on separating α-pinene and longifolene was discussed. The relative volatilities of α-pinene and longifolene decrease in the presence of abietic acid, indicating a negative impact of abietic acid on their separation. The experimental data were correlated well with the nonrandom two-liquid, universal quasichemical, and Wilson models. The binary interaction parameters for each equation were also obtained, and the largest mean relative deviation of vapor-phase mole fraction and the largest absolute average deviation of pressure are 0.1975% and 0.0856 kPa, respectively.
研究领域:
化工工程
·
分析化学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）