FOOD CHEMISTRY
·
2014
·
IF 3.259
Yinghua Xie,Yunxia Zheng,Xiling Dai,Quanxi Wang,Jianguo Cao,Jianbo Xiao
The seasonal dynamics of the total flavonoid contents in various parts of Dryopteris erythrosora , a traditional Chinese medicinal fern, and their antioxidant activity were investigated. The total flavonoids content in various parts of D. erythrosora showed an obvious seasonal dynamic change. The total flavonoid contents in stems (from 4.3% to 12.5%) were much higher than that in leaves with an average content of 2.01%. In spring, the total flavonoid contents in stems were relatively low, but increased rapidly from summer to winter. However, the seasonal dynamics of total flavonoid contents in leaves showed different model. The total flavonoid contents in the stems showed a negative correlation with that in the leaves from January to July. The correlation coefficient of about −0.7 was obtained. The antioxidant activity of the extracts also altered in proportion to the change of total flavonoid contents. In general, the extracts from stems always showed highest antioxidant potentials and it was suggested that the stems can be used as crude medicine.
研究领域:
植物学
·
药理学
✓ 已验证
DOI
高影响因子
LETTERS IN ORGANIC CHEMISTRY
·
2023
·Vol. 20
·期 4
·370-375
·
IF 0.8
Chai Mengliang,Wu Fengtian,Wu Ling
The process of hydrogen bond donor accelerating the cycloaddition of epoxides with CO2 is green access to high economic value cyclocarbonate derivatives. However, hydrogen bond donor still has certain limitations such as poor biocompatibility and narrow substrate
scope. Our group found that folic acid could promote the coupling reaction of epoxides and CO2 through hydrogen-bonding. The reaction was used to synthesize various cyclocarbonate derivatives in good to high yields with the aid of folic acid and TBAB. In addition, benzoic
acids and 2,4-quinazoline dione were synthesized in the presence of CuCl2/folic acid and PdCl2/folic acid, respectively. The reaction mechanism was proposed based on previous reports and control experiments.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ECONOMIC ENTOMOLOGY
·
2017
·Vol. 110
·期 4
·1556-1562
·
IF 1.824
Hu Wei,Zhang Ning,Chen Hongli,Zhong Balian,Yang Aixue,Kuang Fan,Ouyang Zhigang,Chun Jiong
Sweet orange oil fractions were prepared by molecular distillation of cold-pressed orange oil from sample A (Citrus sinensis (L.) ‘Hamlin’ from America) and sample B (Citrus sinensis Osbeck ‘Newhall’ from China) respectively, and their fumigant activities against medium workers of red imported fire ants (Solenopsis invicta Buren) were investigated. The volatile composition of the orange oil fractions was identified and quantified using GC–MS. Fractions from sample A (A1, A2, and A3) contained 23, 37, and 48 chemical constituents, and fractions from sample B (B1, B2, and B3) contained 18, 29, and 26 chemical constituents, respectively. Monoterpenes were the most abundant components, accounting for 73.56% to 94.86% of total orange oil fractions, among which D-limonene (65.28–80.18%), β-pinene (1.71–5.58%), 3-carene (0.41–4.01%), β-phellandrene (0.58–2.10%), and linalool (0.31–2.20%) were major constituents. Fumigant bioassay indicated that all orange oil fractions exerted good fumigant toxicity against workers of fire ants at 3, 5, 10, and 20 mg/centrifuge tubes, and B1 had the strongest insecticidal potential, followed by A1, B2, A2, B3, and A3. The fractions composed of more high volatile molecules (A1 and B1) showed greater fumigant effects than others. Compounds linalool and D-limonene, which were the constituents of the orange oil, exhibited excellent fumigant toxicity against red imported fire ant workers. Linalool killed red imported fire ant workers completely at 5, 10, and 20 mg/tube after 8 h of treatment, and D-limonene induced >86% mortality at 8 h of exposure.
研究领域:
昆虫学
·
植物化学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Runping Wang,Zaibo Yang,Wenzhi Lv,Zhijian Tan,Hongfu Zhang
The choline tryptophan ionic liquid (IL)-based aqueous biphasic system (ABS) was designed and applied to extract and separate flavonoids and iridoids from Eucommia ulmoides leaves. This ABS possessed a unique viscous layer enriching iridoids that can be directly removed at the interface between the IL-rich and salt-rich phases. The extraction yield of total flavonoids was optimized by RSM to obtain a predicted maximum of 2.91% at the IL concentration of 36.73%, liquid to solid ratio of 38, extraction temperature of 44 °C and extraction time of 105 min. The determined extraction yield of total flavonoids is 2.78% ± 0.12% under revised optimization conditions. The distribution coefficient K and extraction rate E of total flavonoids in the IL-rich phase reach the maximum of 129% and 98.53% at the K 3 PO 4 content of 26% in the ILABS, respectively. The HPLC analysis shows a high content of rutin in the flavonoids precipitate induced by water as an anti-solvent. Aucubin content reaches 15.19% in the intermediate viscous layer enriching iridoids. Hence, the designed process has the potential to be applied to the separation and enrichment of rutin and aucubin from other industrial crops.
研究领域:
植物化学
·
天然产物分离
✓ 已验证
DOI
高影响因子
ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA
·
2013
·Vol. 146
·期 3
·357-363
·
IF 1.669
Yongjun Du,Ping Li,Zhiqun Chen,Yanru Lin,Yahong Wang,Yuanxia Qin
The sex pheromone of Phyllonorycter ringoniella (Matsumura) (Lepidoptera: Gracillariidae) has been identified to be a blend of ( Z )-10-tetradecenyl acetate ( Z 10-14:OAc) and E 4, Z 10-tetradecadienyl acetate ( E 4, Z 10-14:OAc) in Japan, Korea, and China. However, the commercial product based on previous results is not attractive enough to be used for monitoring and controlling apple leafminer populations in the field. We re-investigated the attractiveness of the two pheromone components, singly and in blends, in apple orchards in Shangdong and Shaanxi, the main apple-growing provinces in China. Our results revealed that Z 10-14:OAc alone was not attractive to P . ringoniella male moths in the field, but E 4, Z 10-14:OAc alone not only was strongly attractive but caught more males than any of the blends of Z 10-14:OAc and E 4, Z 10-14:OAc tested. The most attractive blend ratios differed slightly for the two locations. No clear dose–response relationship was obtained for the 2:8 blend of Z 10-14:OAc and E 4, Z 10-14:OAc. However, the dose–response field study of E 4, Z 10-14:OAc alone showed that 1 mg per lure achieved the highest moth catch. These findings differ from the previous report of the best pheromone blend in China. Our data showed that E 4, Z 10-14:OAc is the major component of the pheromone of P . ringoniella .
研究领域:
昆虫学
·
农业害虫防治
✓ 已验证
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2021
·Vol. 45
·期 4
·929-937
·
IF 3.645
Xiaoyan Ouyang,Yuling Hu,Gongke Li
In this work, an integrated sample-pretreatment strategy for the separation and enrichment of microplastics and primary aromatic amines from the migration of teabag was developed. The migration solution of teabag was passed through a homemade device. The microplastics were firstly captured by a silver membrane, and then the primary aromatic amines were enriched by a solid-phase extraction column. The microplastics migrated from teabag were detected by attenuated total reflection-Fourier transform infrared spectrometer and Raman spectroscopy. The data showed the character, the number of particles, area ratio, and morphology of microplastics migrated from the teabag. Subsequently, after the enrichment procedure, a sensitive analytical method for primary aromatic amines was established followed by ultra-high performance liquid chromatography-tandem mass spectrometry. The method showed wide linear ranges with R 2 greater than 0.9915, low limits of detection (2–18 ng/L), and low limits of quantification (8–50 ng/L). The developed method was adopted to analyze microplastics and primary aromatic amines migrated from nylon and polyethylene terephthalate teabag under different temperatures and times. The integrated sample-pretreatment strategy displayed promising potentials in the one-step preparation of the microplastics and hazardous molecules in the sample of environment and food security.
研究领域:
环境科学
·
食品安全
·
分析化学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Jian Luo,Yue Gao,Yukun Liu,Xueping Huang,Da-xia Zhang,Haichao Cao,Tongfang Jing,Feng Liu,Beixing Li
At present, it is highly important to develop a simple and compatible nano delivery system for pesticides for foliar application, which can improve their insecticidal efficacy and resistance to adverse climates while reducing the environmental risks. Polyethylene glycol and 4,4-methylenediphenyl diisocyanate are used as hydrophilic soft and hydrophobic hard segments, respectively, for polymer self-assembly and polyurethane gelation in a nanoreactor. The nanocarrier synthesis and the pesticide loading are realized by a one-step integration procedure and suited well for hydrophobic active compounds. Modifying the molecular structure of the soft segment can adjust the flexibility of the nanocarriers and result in viscosity and deformation characteristics. After foliar spray application, the foliar flattening state of the nanogels increases the foliar protection area by 2.21 times and improves both pesticide exposure area and target contact efficiency. Concurrently, the flexibility and viscosity of the nanogels increase the washing resistance and the retention rate of the pesticide by approximately 80 times under continuous washing. The encapsulation of the nanogels reduces the foliar ultraviolet (UV) degradation and aquatic pesticide exposure, which increase the security of λ-cyhalothrine by 9.33 times. Moreover, the degradability of nanogels is beneficial for pesticide exposure and reducing pollution. This system has simple preparation, good properties, and environmental friendliness, making the nanocarriers promising for delivering pesticides.
研究领域:
农业科学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Wu Panpan,Tang Xiaowen,Jian Rongchao,Li Jiahao,Lin Maoyu,Dai Huachao,Wang Kangpeng,Sheng Zhaojun,Chen Baizhong,Xu Xuetao,Li Chen,Lin Zhongze,Zhang Qingmin,Zheng Xi,Zhang Kun,Li Dongli,Hong Weiqian David
Two essential oils were isolated from discarded perfume lemon and leaves (Citrus limon (L.) Burm. F.) by hydro-distillation with good yield (0.044% for perfume lemon and 0.338% for leaves). Their biological activities were evaluated against five selected bacterial strains and Aedes albopictus (Ae. albopictus, Diptera: Culicidae). Chemical composition indicated that both essential oils were rich in essential phytochemicals including hydrocarbons, monoterpenes and sesquiterpene. These constituents revealed some variability among the oils displaying interesting chemotypes (R)-(+)-limonene (12.29–49.63%), citronellal (5.37–78.70%) and citronellol (2.98–7.18%). The biological assessments proved that the two essential oils had similar effect against bacterial (inhibition zones diameter ranging from 7.27 ± 0.06 to 10.37 ± 0.15 mm; MICs and MBCs ranging from 1.6 to 6.4 mg/mL); against Ae. albopictus larvae (LC50 ranging from 384.81 to 395.09 ppm) and adult mosquito (LD50 ranging from 133.059 to 218.962 μg/cm2); the activity of the two chemotypes ((R)-(+)-limonene and citronellal): larvae (LC50 ranging from 267.08 to 295.28 ppm), which were all presented in dose-dependent manners. Through this work, we have showcased that recycling and reusing of agriculture by-products, such as discarded perfume lemon and leaves can produce eco-friendly alternatives in bacterial disinfectants and mosquito control product.
研究领域:
植物化学
·
生物活性研究
·
农业废弃物利用
✓ 已验证
DOI
高影响因子
Plants-Basel
·
2024
·Vol. 13
·期 2
·315
·
IF 4
Sumei Li,Min Yin,Peng Wang,Lulu Gao,Fenni Lv,Rutong Yang,Ya Li,Qing Wang,Linfang Li,Yongdong Liu,Shuan Wang
Background: The yellow-leafgl1mutant ofLagerstroemia indicaexhibits an altered phenylpropanoid metabolism pathway compared to wild-type (WT). However, details on the metabolites associated with leaf color variation, including color-specific metabolites with bioactive constituents, are not fully understood. Methods: Chemical and metabolomics approaches were used to compare metabolite composition and antioxidant capacity between thegl1mutant and WT leaves. Results: The mutant exhibited an irregular xylem structure with a significantly lower phenolic polymer lignin content and higher soluble phenolic compounds. Untargeted metabolomics analysis identified phenolic compounds, particularly lignans, as key differential metabolites betweengl1and WT, with a significant increase in the mutant. The neolignan derivative balanophonin-4-O-D-glu was identified as a characteristic metabolite in thegl1mutant. The soluble phenolic compounds of thegl1mutant exhibited higher FRAP, ABTS, DPPH, and hydroxyl radical scavenging activity than in WT. Correlation analysis showed a positive relationship between antioxidant capacity and phenolic compounds inL. indica. Conclusions: Metabolites associated with leaf color variation in theL. indicayellow-leafgl1mutant demonstrated high antioxidant capacity, particularly in scavenging hydroxyl radicals.
研究领域:
植物学
·
代谢组学
·
遗传学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PEST MANAGEMENT SCIENCE
·
2024
·Vol. 80
·期 8
·3884-3892
·
IF 3.8
Sijia Zhang,Zhenggang Xiao
BACKGROUNDS Pesticides have been widely applied to promote plant growth due to their high insecticidal efficiency. However, most pesticides easily slip from the leaf surface due to the low foliar adhesion, leading to significant damage to the environment and human health. Increasing foliar adhesion of pesticides has been a major challenge. Nanomaterial technology, which can deliver pesticide active ingredients, offers a new opportunity to increase pesticides efficacy with higher foliar adhesion. RESULTS In this study, we prepared the pesticide loaded nanohydrogel ALP@Ge-g-P(AA-co-AM)/ATP by grafting attapulgite and gelatin onto P(AA-co-AM), and loading the pesticide alphacypermethrin synchronously via the emulsion solvent evaporation method. The size of the new nanohydrogel was 20.5 nm and the pesticide loading capacity was 21.5%. Compared to P(AA-co-AM), the water absorbency of Ge-g-P(AA-co-AM)/ATP increased by 54.3% in 120 min, while the water retention increased from 4.27% to 38.7% after 48 h. Washout experiments and contact angle results suggested that the nanohydrogel, with a contact angle of 44.8° indicating good wettability, can resist rain flush and increase foliar adhesion naturally. CONCLUSIONS Overall, the preparation of pesticide loaded nanohydrogel is simple. Experiments demonstrated the pesticide loaded nanohydrogel has high efficiency and strong foliar adhesion. This makes it a promising candidate for spraying application and reducing pollution levels. © 2024 Society of Chemical Industry.
研究领域:
农业科学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Junren Xu,Jing Lu,Shanliang Fu,Na Li,Yiqiao Zhao,Kunbo Wang,Zhonghua Liu,Taolin Chen,Jianan Huang,Mingzhi Zhu
Amino acids (AAs) and short-chain fatty acids (SCFAs) are key to tea's flavor and health benefits. This study developed a novel GC–MS and GC-FID method using rapid (3 min), high-sensitivity (0.00062 μg mL −1 < LOD < 0.04964 μg mL −1 ) pre-column derivatization with propyl chloroformate to simultaneously measure 17 AAs and 9 SCFAs. The spatial distribution analysis revealed total AAs and theanine were enriched in tender stems, buds, and tender leaves, while mature and older leaves had lower concentrations. Within the same leaf, theanine, glutamic acid, and acetic acid are primarily located near the leaf veins. Six teas from the same raw material were analyzed for processing impacts, showing green, white, yellow, and oolong teas had higher AA and theanine levels than black and dark teas. Certain dark teas exhibited elevated acetic acid levels compared to other teas. This study enhances our understanding of AA and SCFA profiles, providing valuable insights for tea research.
研究领域:
食品科学
·
植物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FITOTERAPIA
·
2025
·
IF 2.6
Li Zhang,Hui Wu,Xiaoyuan Li,Xiu Zhang,Hua Li,Huaqiao Tang,Daxuan Tang,Shijing Du,Ya’’ou Liu,Yangfan Tang,Xiaoming Bao,Guoqiang Cheng
Qianghuo (the rhizomes and radixes of Notopterygium incisum Ting ex H.T. chang) is a traditional Chinese medicine, and widely used as an anti-inflammatory, anodyne, antifebrile agent. Qianghuo volatile oil also exhibits the same properties, and the effects are probably related to the inhibition of cyclooxygenase (COX), but its bioactive components are not clear yet. To figure out the bioactive components of Qianghuo volatile oil target to cyclooxygenase-2 (COX-2), a ligand fishing method using immobilized COX-2 magnetic beads (COX-2-MB S ) and gas chromatography–mass spectrometry (GC–MS) were developed to identify the compounds that act on COX-2. Nine ligands, including 3-carene, β-caryophyllene, eucalyptol, α-terpinene, Limonene, δ-terpinene, α-pinene, β-pinene and γ-terpinene, were specifically captured by COX-2-MB S . Among them, 3-carene, β-caryophyllene, and eucalyptol in Qianghuo volatile oil were isolated and confirmed by in vitro inhibition and in vivo anti-inflammatory activity assays as selective inhibitor against COX-2. The IC 50 values were 13.5, 10.1, and 7.6 μM, respectively. Compared with the model, 3-carene, β-caryophyllene, and eucalyptol considerably reduced ear swelling and paw edema. Moreover, 3-carene and eucalyptol significantly decreased the changes of COX-2 expression in RAW264.7 cells activated by LPS. Our study validated that the developed ligand-fishing method using COX-2-MBs coupled with GC–MS can be applied to recognize COX-2 inhibitors in Qianghuo volatile oil. In vitro/vivo assay showed 3-carene and eucalyptol in Qianghuo volatile oil had strong inhibition against COX-2. This study may provide novel methods for discovering active components for volatile oil–based drug development or aromatherapy.
研究领域:
中药学
·
生物化学
·
药理学
✓ 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）