PHYTOCHEMISTRY
·
2018
·
IF 3.186
Yangyang Xiao,Ling Lv,Ping Gou,Haihui Xie
Eight previously undescribed acyl atractyligenin and carboxyatractyligenin glycosides were isolated from whole Antennaria rosea subsp. confinis (Greene) R. J. Bayer (Compositae) [syn. Leontopodium leontopodioides (Willd.) Beauv. (Asteraceae)] plants and their structures were determined by spectroscopic and chemical methods. The compounds were trivially named leontopodiosides F–M. Seven of the compounds showed potent in vitro inhibitory activity toward pancreatic lipase with IC 50 values ranging from 3.4 to 52.5 μM, suggesting that they participate in the previously observed effect this plant has in reducing triglyceride absorption in rats.
研究领域:
植物化学
·
药理学
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产品关联
DOI
PubMed
高影响因子
Insects
·
2023
·Vol. 14
·期 7
·591
·
IF 3
Pingfan Jia,Xiaoyu Zhang,Bo Wang,Qinge Ji
Simple SummaryThe Solanaceae crops are the main hosts ofZeugodacus tau, a pest insect that causes serious damage to economically important crops of Solanaceae. In the winter–spring period, female adults ofZ. tauhave been found to oviposit on the pepino melonSolanum muricatum. However, the differences in the ability of the fruits ofS. muricatumand other Solanaceae crops to attract gravidZ. taufemales have not been clarified. In this study, oviposition and trapping bioassays were performed to clarify whether such differences existed. GC-MS was used to identify the compounds and relative contents of the volatile odors ofS. muricatum. The Y-tube olfactometer system was used to determine the compounds that induced behavioral responses in gravidZ. taufemales. The results show thatSolanum muricatumodor was attractive forZ. taufemales. The nine compounds from the volatiles ofS. muricatuminduce behavioral responses in gravidZ. taufemales. These results are beneficial for preventingZ. taufemales from harmingS. muricatum, developing attractants and repellents forZ. taufemales, and establishing a system of ecological control forZ. taufemales.AbstractZeugodacus tau(Walker) (Diptera: Tephritidae) is a pest seriously harmful to Solanaceae crops and was found to oviposit on the pepino melonSolanum muricatum(Aiton). To date, the differences in the ability of the fruits ofS. muricatumand other Solanaceae crops to attract gravidZ. taufemales have seldom been reported. Oviposition and trapping bioassays were performed to clarify whether such differences existed. A combination of GC-MS and the Y-tube olfactometer system was used to identify and determine the compounds inducing behavioral responses in gravidZ. taufemales to the volatile odors ofS. muricatum. The results show thatS. muricatumodors play a role in attracting gravidZ. taufemales. The odors of Solanaceae crops influence their ability to attract these organisms. The nine compounds from the volatiles ofS. muricatuminduce tendency or repellency responses in gravidZ. taufemales. Hexyl acetate, butyl acetate, amyl actate, and isoamyl acetate caused tendency behavior in gravidZ. taufemales, while hexyl hexanoate, butyl isovalerate, butyl valerate, and isoamyl hexanoate caused repellency behavior. Heptyl acetate caused repellency behavior in gravidZ. taufemales at higher concentrations (5 mg/mL) but caused tendency behavior at a low concentration (0.5 mg/mL). These results suggest that vigilance against the harm caused byZ. tauis required during the cultivation ofS. muricatum. The nine compounds of the volatile odors ofS. muricatumcould help to develop attractants and repellents for gravidZ. taufemales. These results are beneficial for preventingZ. taufemales from harmingS. muricatum, developing attractants and repellents forZ. taufemales, and establishing a system of ecological control forZ. taufemales.Keywords:Zeugodacus tau;Solanum muricatum;induced oviposition;attraction rate;volatile
研究领域:
昆虫学
·
植物保护
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DOI
PubMed
高影响因子
ACS Omega
·
2023
·
IF 4.1
Lei Wang,Zeen Yv,Licheng Ma,Qi Zheng,Tong Wang,Xiaokui Che,Xinglan Cui,Hongxia Li,Shenyv Wei,Xinyue Shi
Calcium carbonate is a common natural mineral with a wide range of applications. In this study, hollow calcite microspheres were successfully synthesized by using calcium chloride and sodium carbonate as raw materials in an SDS–PEG system. The results suggested that the appropriate concentration of SDS is necessary during the spherical crystallization of calcium carbonate. It was found that the crystals started to aggregate under the effect of SDS, and aggregation was enhanced with an increase in SDS concentration, leading to the transformation from hollow to solid microspheres. However, high temperatures will lead to the transformation from calcite to aragonite, resulting in the collapse of the formed spherical structure. Infrared spectroscopy and conductivity analysis suggested that when the concentration of SDS reached 0.3 g/L in the PEG–SDS system, SDS and PEG formed a spherical supramolecular structure. This structure could act as a template, leading to the aggregation of calcite through electrostatic attraction and finally to the formation of a hollow spherical structure.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2016
·Vol. 227
·期 12
·1-12
·
IF 1.551
Zhang Zhan-hang,Zhang Jing-li,Liu Jian-ming,Xiong Zhen-hu,Chen Xu
Zeolitic imidazole frameworks (ZIFs), a new adsorbent with a high chemical and thermal stability and a high adsorption capacity, are used for adsorptive removal of azo dyes. The synthesized ZIF-67 was characterized with Fourier transform infrared spectroscopy (FTIR), thermogravimetric–differential thermal analysis (TG–DTA) and zeta potential instrument. The adsorption of some azo dyes on ZIF-67 in the single dye systems showed that the removal efficiencies are congo red > methyl orange > methyl red > methyl blue. The highest adsorption capacity of congo red and methyl orange were 3900 and 1340 mg/g, respectively. In a binary dye system the adsorption capacity of congo red decreased, while the removal efficiency of methyl orange increased in comparison with the single systems, indicating that a competitive adsorption of congo red and methyl orange over the ZIF-67 occurred. The experimental data indicate that the electrostatic attraction between ZIF-67 and congo red is the major driving force and the π – π stacking is also responsible for dye adsorption. After 5 cycles of ZIF-67 adsorption and desorption, the congo red removal efficiency maintained more than 95%.
The adsorption of Congo red and Methyl orange on the ZIF-67
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-13
·
IF 3.9
Mobarak Syed Husne,Basit Abdul,Wu Lei,Khurshid Aroosa,Gui Shun-Hua,Hu Chao-Xing,Liu Tong-Xian
Bactrocera dorsalis is a major pest causing economic losses in fruit and vegetable production. Current control methods, such as synthetic pesticides and male annihilation techniques, have drawbacks, including health risks, resistance development, and ineffectiveness against females. This study investigates the attractions and oviposition stimulant activities of five common volatiles—[isobutyl acetate (A), isoamyl acetate (B), isobutyl butyrate (C), isoamyl isovalerate (D), and isoamyl butyrate (E)]—from the most preferred hosts: mango, guava, orange, and banana. These volatiles were tested at three different concentrations, both individually and in complex blends. Choice tests were performed using a Y-tube olfactometer and Petri plate with agarose assays, and antennal responses were determined using electroantennogram (EAG) recordings. Among them, a blend comprising 1.25% isoamyl acerate (10.95 µg/µl), 1.25% isoamyl isovalerate (10.75 µg/µl), and 20% isoamyl butyrate (172.40 µg/µl) (B1D1E3) emerged as the most potent attractant for both sexes and oviposition stimulant for females. Moreover, combining B1D1E3 with mango, banana, or orange juice significantly enhanced egg-laying behavior. Electrophysiological recordings supported these findings, with B1D1E3 eliciting the strongest antennal responses. Results suggest B1D1E3 could be used to elicit strong oviposition responses in mass rearing of B. dorsalis for the Sterile Insect Technique.
研究领域:
昆虫学
·
农业科学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Yanwen Guo,Zhenzhen Cai,Fei Yan,Da Lei,Yanan Guo,Shuhai Zhang,Xincun Dou
The precise regulation of the electron-withdrawing/electron-donating strength in a probe is of great significance for the design of reaction-based fluorescent probes with specific functionalities. Here, a family of excited-state intramolecular proton transfer (ESIPT)-based probes with fluorescence turn-on sensing properties toward KMnO4 was designed by precisely modulating the electron-withdrawing strength of the substituents located at the para-position of the recognition group. It is found that −F, −CHO, and −H as the electron-withdrawing groups bound at the probe can specifically recognize KMnO4, which ensures a blue emission displayed by the reaction products. Especially with −CHO as the electron-withdrawing group, the reaction product shows the most stable fluorescence. The probe 2-(benzo[d]oxazol-2-yl)-4-formylphenyl acrylate (BOPA-CHO) demonstrated a more superior sensing performance toward KMnO4, including a low limit of detection (LOD, 0.96 nM), a rapid response (<3 s), and a rather good selectivity even in the presence of 21 interferents. Moreover, the practicality of the probe was further verified by a test pen comprising a BOPA-CHO-embedded sponge, which is capable of detecting KMnO4 solid with a naked-eye LOD of 11.62 ng. The present probe design and modulation strategy would open up a new path for the design of high-performance fluorescent probes.
研究领域:
分析化学
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荧光传感
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材料科学
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产品关联
DOI
PubMed
高影响因子
Small
·
2023
·Vol. 19
·期 49
·2304084
·
IF 13.3
Xiaolei Wang,Wenqian Wang,Bowen Liu,Zichen Song,Zhiyu Ren,Honggang Fu
Although the electron-withdrawing effect of gold (Au) is highlighted in catalytic reactions, its enhancement mechanism for electron transport, especially in the electrochemical process, is still unclear. Herein, Au-decorated Bi 2 O 3 (Au-Bi 2 O 3 ) is proposed as a proof-of-concept to investigate the electron-withdrawing effect in the electrocatalytic CO 2 reduction reaction (eCO 2 RR) process. Evidence from in situ Raman spectra and in situ XRD tests reveals that, compared to Bi 2 O 3 , Bi species in Au-Bi 2 O 3 can be reduced to metallic Bi more rapidly and more easily driven by the electron-withdrawing effect of Au. The XPS tests after eCO 2 RR further validates the transformation from Bi 3+ to Bi 0 in Au-Bi 2 O 3 is more complete. Meanwhile, in the in situ Fourier transform infrared (FTIR) spectra, the key intermediates (CO 2 * − and OCHO* − ) appear at the more positive potential, indicating that metallic Bi is favorable for eCO 2 RR due to the lower energy barrier as corroborated by density function theory (DFT) calculations. Au don't directly participate in the conversion from CO 2 to formate as the reaction sites, but utilize the electron-withdrawing effect to motivate Bi-sites to deliver higher catalytic activity and higher selectivity to formate at a lower applied potential. This study not only has an insight into the electron-withdrawing effect of Au on the eCO 2 RR process, but also develops a new perspective for engineering electron-withdrawing effect in electrocatalysts for high-efficient CO 2 -to-formate conversion.
研究领域:
电催化
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材料科学
·
理论计算
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yifan Song,Shumin Hu,Lingyu Zhu,Jiayuan Wang
The successful preparation of starch-based Pickering emulsions typically relies on the use of high-viscosity or high-boiling-point oil solvents. However, these solvents present challenges in removal and limit the applicability of the emulsions. This study aims to investigate the feasibility and effectiveness of employing small-molecule solvents as alternatives for the oil phase. Specifically, quinoa starch granules are used as the emulsifying agent, with a systematic exploration of various small molecules from different solvent categories. This research contributes by identifying the impact of solvent-particle interactions on the feasibility of emulsion formation—an aspect critical but often overlooked in previous discussions on solvent influence on emulsion quality, essential for guiding solvent selection. Furthermore, to address potential challenges associated with maintaining emulsion stability when using low-viscosity oils, a strategy based on exploiting depletion attraction is proposed and demonstrated, leveraging bovine serum albumin as depletants.
研究领域:
食品科学
·
胶体化学
·
界面科学
✓ 已验证
产品关联
DOI
高影响因子
Parasites & Vectors
·
2015
·Vol. 8
·期 1
·1-8
·
IF 3.43
Yu Bao-Ting,Ding Yan-Mei,Mo Jian-Chu
Background Most mosquito species need to obtain sugar from host plants. Little is known about the chemical cues that Culex pipiens pallens use during their orientation to nectar host plants. In this study, we investigated the behavioural responses of female Cx. pipiens pallens to common floral scent compounds and their blends.Methods Behavioural responses of female Cx. pipiens pallens to 18 individual compounds at different concentrations were determined in the olfactometer bioassays. A synthetic blend composed of behaviourally active compounds was formulated, and its attractiveness to mosquitoes was tested. Several most attractive compounds constituted a reduced blend, and its attractiveness was tested against the solvent and the full blend, respectively. Mosquito response in the olfactometer was analyzed by comparing the percentages of mosquitoes caught in the two arms by χ2 test (observed versus expected).Results Fifteen of the 18 compounds were attractive to female Cx. pipiens pallens in the dose-dependent bioassays, with the exception of β-pinene, acetophenone and nonanal. (68.00 ± 2.49) % mosquitoes responded to the full blend composed of these 15 compounds on their optimal doses when tested against the solvent, with the preference index at 46.11 ± 3.57. Six individual compounds whose preference indices were over 40 constituted the reduced blend, and it attracted (68.00 ± 1.33) % mosquitoes when tested against the solvent while its preference index was 42.00 ± 3.54. When tested against the full blend simultaneously in the olfactometer, the reduced blend could attract (45.00 ± 2.69) % of released mosquitoes, which was as attractive as the full blend.Conclusion sOur results demonstrate that female Cx. pipiens pallens is differentially attracted by a variety of compounds at different concentrations. Alteration of the concentration strongly affects the attractiveness of the synthetic blend. Several floral scent volatiles might be the universal olfactory cues for various mosquito species to locate their nectar host plants, which could be potentially used in trapping devices for surveillance and control of them.
研究领域:
昆虫学
·
化学生态学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Jian Tang,Yue-Fei Zhang,Yun Liu,Yan Li,Hui Hu
Polyacrolein (PA) was prepared by photoinduced free radical polymerization for adsorption of congo red (CR). The structural and physicochemical properties of PA were characterized using BET, zeta potential measurements, SEM, FT-IR and XPS. The adsorption process of CR accorded with the pseudo -second-order kinetics, while the adsorption isotherm conformed to be the Langmuir model and the adsorption was proved to be the spontaneous and endothermic process (Δ G 0 < 0, Δ H 0 > 0). Electrostatic attraction, hydrogen bond and chemical reaction (formation of imine) were the critical driving forces of adsorption. The good removal efficiency obtained during the five executed cycles suggested a good reusability of PA. It was noteworthy that salts in CR solution could promote the adsorption capacity of PA, in which Ca (II) could obviously improve the adsorption capacity and shorten the time to reach adsorption equilibrium. These results have provided very useful information for removing CR and enhanced our understanding of the adsorption mechanism of PA on CR.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Guangxin Feng,Gaoshang Wang,Qing Li,Chuanwu Han,Dong Wei,Jian Guo,Zhili Wan,Jinmei Wang,Xiaoquan Yang
3D printing has been applied to create nutritious foods with tailored textures for the elderly. However, the edible materials that possess the elastoplastic properties and shear-thinning behavior required for direct-write 3D printing are limited. In this study, we developed a simple approach to fabricate Spirulina emulsion gels as edible 3D printable material by exploiting depletion attraction between emulsion droplets. By controlling the volume ratio of continuous and oil phases, mixing highly viscous Spirulina slurry and vegetable oil could form self-standing oil-in-water emulsion gels with elastoplastic rheological properties. Also, adding food polysaccharides into the continuous phase could act as depletants to drive the formation of emulsion gels. Auto-fluorescence spectroscopy and microscopy were employed to characterize the interfacial protein compositions of the emulsion, showing that phycobilisome (PBS) particles might play a dominant role in the formation of Spirulina emulsions. The depletion attraction could drive the adsorption of PBS particles onto the droplet interface, and the particle-armored droplets in the dispersed phase connected into a percolating droplet cluster, resulting in arrested dynamics and gelation . Overall, this novel approach can be applied by exploiting depletion attraction and opens up possibilities for using high-solids viscous food slurries to produce personalized 3D-printed foods.
研究领域:
食品科学
·
生物物理学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Insects
·
2022
·Vol. 13
·期 11
·1056
·
IF 3.139
Nanxia Fu,Fida Hussain Magsi,Yingjie Zhao,Xiaoming Cai,Zhaoqun Li,Lei Bian,Chunli Xiu,Zongmao Chen,Zongxiu Luo
Simple SummaryThe tea tortrixArchips strojnyis a major pest of spring tea in China. Using sex pheromone-based mass trapping or mating disruption techniques to control this pest can minimize excessive pesticide usage, thereby maintaining pesticide residues within the safety standard for spring tea products. However, the sex pheromone components of this species remain elusive. In this study, we identified these components: laboratory assays showed that two bioactive compounds in female sex pheromone gland extracts, namely, (Z)-11-tetradecenyl acetate (Z11-14:Ac) and (Z)-11-tetradecenyl alcohol (Z11-14:OH), could elicit male moth antennal responses. A field trapping assay demonstrated that Z11-14:Ac was the attractant in the sex pheromone, while Z11-14:OH seemed to be an antagonist. Overall, our results indicated that lures baited with 1 mg of Z11-14:Ac could be used as a monitoring or mass trapping tool forA. strojnymanagement in Chinese tea plantations. Furthermore, Z11-14:Ac was found to be a common attractant in the sex pheromones of nine leafroller species in the genusArchips. Thus, Z11-14:Ac may be used to develop a mating disruption technique targeting multiple leafroller species.AbstractPesticide application is the only known control method for the tea tortrixArchips strojny(Lepidoptera: Tortricidae), which is a major pest of spring tea in China. To develop sex pheromone-based, environmentally safe control strategies, here we identified the sex pheromone components of this species. The male moths’ antennae responded electrophysiologically to two compounds in female pheromone gland extracts. Gas chromatography–mass spectrometry analysis indicated that the two bioactive compounds were (Z)-11-tetradecenyl acetate (Z11-14:Ac) and (Z)-11-tetradecenyl alcohol (Z11-14:OH). Field trapping assays showed that lures baited with only the major component Z11-14:Ac were the most attractive to male moths, and the attractiveness decreased significantly when the lure was impregnated with increased relative ratios of the minor component Z11-14:OH. Our study demonstrated that Z11-14:Ac was the major attractant in theA. strojnysex pheromone, and the minor component Z11-14:OH seemed to serve as an antagonist. The results indicate that lures baited with 1 mg of Z11-14:Ac could be used as a monitoring or mass trapping tool forA. strojnymanagement in Chinese tea plantations. Furthermore, Z11-14:Ac was identified as a common sex pheromone attractant of nineArchipsspecies; these results lay the foundation for developing mating disruption techniques that target multiple leafroller pests.Keywords:female sex pheromone;Archips strojny;(Z)-11-tetradecenyl acetate;male attraction;tea pest
研究领域:
昆虫学
·
农业科学
·
化学生态学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）