JOURNAL OF INSECT SCIENCE
·
2024
·Vol. 24
·期 3
·
IF 2.1
Liu Yan-Mei,Huang Yuan-Yuan,Wang Fei-Feng,Hu Yu-Wei,Zhang Zhi-Lin,Cuthbertson Andrew G S,Qiu Bao-Li,Sang Wen
Huanglongbing (HLB), a devastating citrus disease caused by Candidatus Liberibacter asiaticus, is efficiently vectored by the Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae). Tamarixia radiata (Waterston) plays a crucial role as an ectoparasitoid, preying on D. citri nymphs. By collecting and identifying headspace volatiles from fifth instar nymphs of D. citri using a gas chromatograph–mass spectrometer (GC–MS), we obtained a collection of 9 volatile compounds. These compounds were subsequently chosen to investigate the electrophysiological and behavioral responses of female T. radiata. At a concentration of 10 μg/μl, 9 compounds were compared with cis-3-hexen-1-ol (control), resulting in trans-2-nonenal inducing the highest relative electroantennogram (EAG) value, followed by hexanal, heptanal, n-heptadecane, tetradecanal, n-tetradecane, n-pentadecane, 1-tetradecanol, and 1-dodecanol. The top 5 EAG responses of female T. radiata to these compounds were further investigated through EAG dose–response experiments. The results showed positive dose–responses as concentrations increased from 0.01 to 10 μg/μl. In Y-tube olfactometer bioassays, female T. radiata exhibited a preference for specific compounds. They were significantly attracted to tetradecanal at a concentration of 10 µg/µl and trans-2-nonenal at 0.01 µg/µl, while no significant attraction was observed toward hexanal, heptanal, or n-heptadecane. Our report is the first to demonstrate that volatiles produced by D. citri nymphs attract T. radiata, which suggests that this parasitoid may utilize nymph volatiles to locate its host.
研究领域:
昆虫学
·
植物保护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Horticulturae
·
2025
·Vol. 11
·期 5
·490
·
IF 3
Jiawei Ma,Ye Tian,Xuli Liu,Shengyou Fang,Chong Sun,Junliang Yin,Yongxing Zhu,Yiqing Liu
Aphis gossypii Glover (Homoptera: Aphidinae), a major pest of Chinese pepper (Zanthoxylum bungeanum Maxim), causes significant agricultural damage. Ginger (Zingiber officinale Roscoe) has shown potential as a source for developing botanical pesticides due to its strong bacteriostatic and insecticidal properties; however, the underlying mechanisms remain poorly understood. This study evaluated the repellent activity of ginger shoot extract (GSE) across four solvent phases—petroleum ether, trichloromethane, ethyl acetate, and methanol—against A. gossypii. The results demonstrated that GSE exhibited significant repellent effects, with the methanol phase showing the most pronounced activity. Twelve fractions were chromatographically separated from the methanol phase, and electroantennography (EAG) analysis revealed that fraction 4 induced strong EAG responses in both winged and wingless aphids. Further identification of active compounds in fraction 4 by gas chromatography–mass spectrometry (GC–MS) indicated the presence of terpenes, aromatics, alkanes, esters, and phenols as major constituents. Subsequent EAG analysis identified several key compounds—octahydro-pentalene (C1), (Z)-cyclooctene (C2), dimethylstyrene (C3), tetramethyl-heptadecane (C5), tetrahydro-naphthalene (C6), and heptacosane (C9)—as responsible for eliciting EAG responses in both aphid forms. Additionally, results from Y-tube olfactometer assays showed that (Z)-cyclooctene and heptacosane were significantly attractive, while octahydro-pentalene acted as a strong repellent to both winged and wingless aphids. These findings offer valuable insights for the development of synthetic attractants and repellents for A. gossypii and provide a theoretical foundation for utilizing ginger in the creation of botanical pesticides targeting this pest.
研究领域:
昆虫学
·
植物化学
·
农业害虫防治
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ASIA-PACIFIC ENTOMOLOGY
·
2023
·
IF 1.5
Chengfei Song,Xinyao Ma,Jiao Liu,Li Ma,Xingtao Qie,Xizhong Yan,Chi Hao
The diamondback moth (DBM), Plutella xylostella (L.), is a cosmopolitan obligate pest of cruciferous crops. Currently, DBMs management is largely dependent on broad-spectrum synthetic pesticides, which has led to the adverse effects on the environment, human health, and nontargeted organisms. Thus, alternative control methods are needed. The essential oils (EOs) derived from bioactive species may be developed as effective alternatives for the management of DBMs that is safe and eco-sustainable than conventional pesticides. In this study, we investigated electrophysiological (EAG) and behavioral responses of DBM adults to the thirteen non-host EOs of Acorus calamus , Ageratum conyzoides , Artemisia argyi , Chenopodium ambrosioides , Cymbopogon citratus , Foeniculum vulgare , Ocimum basilicum , Pelargonium hortorum , Perilla frutescens , Pogostemon cablin , Polygonum hydropiper , Rosmarinus officinalis , and Ruta graveolens in order to contribute to the development of low environmental impact management alternatives. EAG recordings revealed all the tested EOs significantly elicited EAG responses of DBM females, and the males were sensitive to the eleven EOs except A. conyzoides and O. basilicum . Meanwhile, EAG recordings of DBMs exhibited dose-dependent responses to these tested EOs in most cases. In Y-tube olfactometer bioassays, the EOs of A. calamus , C. citratus , P. hortorum , P. hydropiper , and R. graveolen demonstrated prominent repellent effects on DBM females at concentrations of 10 μg/μL or higher. The results of oviposition bioassays found the number of eggs on the two plants with the five tested EOs were less than that on the two plants with paraffin oil. And the oviposition indexes of the plants that fixed with the EOs of P. hortorum , R. graveolen , A. calamus , P. hydropiper , C. citratus , and paraffin oil were –71.81%, –59.43%, –57.46%, –51.11%, –35.41%, and 0.09%, respectively. These findings indicate that the five EOs, especially P. hydropiper EO, provide active and safe tools for natural repellents to prevent and control DBMs infestations of cruciferous vegetables.
研究领域:
昆虫学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Jiale Zhang,Zhuangzhuang Ma,Maojian Li,Minghao Lou,Hongqiang Wang,Lichao Jia
Ionogel has gained attention as a promising material for flexible electronic skin (e-skin), due to its exceptional conductivity, compositional stability, and biocompatibility. Nevertheless, establishing a seamless interface between ionogel and human skin remains a significant challenge. This study presents the design and fabrication of a nanonet-supported ionogel with a thickness of ≈16 µm, marking it the thinnest ionogel reported to date. This ultrathin ionogel exhibits remarkable toughness (5.51 MJ m − 3 ), a broad strain range (0–375%), and impressive fatigue resistance, enduring over 3000 cycles. Additionally, it offers excellent water resistance and a high water vapor transmission rate (WVTR), supporting perspiration and enhancing skin breathability. Moreover, the ultrathin ionogel has potential as a carrier in transdermal drug delivery systems (TDDS), highlighting its suitability for biomedical applications. Wearable devices incorporating this ultrathin ionogel facilitate continuous, sensitive, and highly accurate monitoring of physiological signals, positioning it as a promising material for future flexible e-skin material.
研究领域:
材料科学
·
生物医学工程
·
柔性电子皮肤
✓ 已验证
产品关联
DOI
高影响因子
Acta Ecologica Sinica
·
2011
·
IF 0
Defu Chi,Xiaocan Li,Jia Yu,Xing Xie,Guangli Wang
In order to investigate the effect of organic volatiles from poplar species on the host plants orientation of Saperda populnea , the essential oil in the 2–3 years old branches from the sapling or mature trees of Populus simonii Carr. and P. simonii Carr. × P. nigra L. were extracted using the steam distillation method. The chemical composition and relative content in essential oil from those branches was analyzed by GC–MS. The main components contained in those volatiles from the four kinds of branches are mainly aromatic compounds such as 1,2 - cyclohexanedione, 2 - cyclohexene - 1 - one, p - xylene and 1,2,3 - trimethylbenzene and so on. The relative content of aromatic compounds contained in branches from saplings was higher than that contained in branches from old tress. EAG response and behavioral reaction of S. populnea L. to those four kinds of distillated essential oil were tested. The results shown that male and female adults of S. populnea L. shown significant choice behavior and strong olfactory response to those essential oil distillated from branches of P. simonii Carr. and P. simonii Carr. × P. nigra L.. The EAG bioassay of S. populnea L. to 10 kinds of monomers compounds which had relative higher contents was tested. The results shown that the EAG response of female adults of S. populnea L. to 1 mol L −1 p-xylene was intensest and reached 1.027 mV, the strength of their EAG response to 0.1 mol L −1 phenol took the second place. The EAG response of male adult of S. populnea L. to 1 mol L −1 p-xylene was strongest and reached to 0.824 mV, the strength of their EAG response to 1 mol L −1 salicylaldehyde took the second place. In the choice behavior test of S. populnea L. adult to monomeric compound carried out in ‘Y’ type olfactometer have found that female and male adult of S. populnea L. all appeared obvious positive taxis to 0.1 mol L −1 p-xylene. The selection rate of female and male adults ware (76.7 ± 4.1)% and (71.7 ± 2.6)%, respectively. The selective reaction to 0.1 mol L −1 1,2-cyclohexanedione and 2-cyclohexene-1-one were not obviously than that to 0.1 mol L −1 p-xylene. The male and female adult of S. populnea L. appeared repelling behavior to 0.1 mol L −1 salicylaldehyde.
研究领域:
昆虫学
·
植物化学
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Meiqiong Zheng,Leqi Li,Xinyuan Ye,Zichong Ji,Yuli Wang,Zonglei Wang,Shihong Lin,Mingzhe Wang,Wenqing Yan,Jiawei Yang,Pengcheng Zhou,Yujie Zhang,Runzi Niu,Hossam Haick,Yan Wang
The rapid advancement of wearable electrophysiological monitoring has driven a growing demand for soft, conductive materials, particularly hydrogels, due to their exceptional mechanical properties, high conductivity, and biocompatibility. However, hydrogel materials are prone to freezing at subzero temperatures, which leads to material failure. Additionally, prefabricated hydrogel electrodes often lack sufficient conformability and long-term stability, thereby limiting their practical applications. We report a skin-printable hydrogel-based epidermal bioelectrode designed for continuous, high-precision wireless electrophysiological monitoring. The hydrogel, synthesized via an effective one-pot process, comprises gelatin, glycerol, ammonium chloride, and water. Its reversible thermal phase transition enables precise printing onto glabrous and hairy human skin. The in-situ formed hydrogel electrode exhibits excellent adhesion at both the hydrogel/skin and hydrogel/electrode interfaces, with adhesion force reaching 0.9 N/cm and 2.6 N/cm, respectively. The incorporation of glycerol and ammonium chloride imparts remarkable anti-freezing properties, allowing the hydrogel to maintain outstanding mechanical flexibility across a broad temperature range, from ultra-low temperatures of −80 °C to the phase transition temperature of 43.9 °C. Remarkably, the hydrogel retains its optical transparency even when immersed in liquid nitrogen. Additionally, the hydrogel demonstrates superior self-healing, high water retention, and recyclable properties. We successfully validated the hydrogel’s potential for personalized healthcare through high-fidelity electrocardiogram recordings over 80 min during various daily activities, demonstrating its practical applicability. This work highlights the versatility and functionality of skin-printable hydrogel as a promising material for next-generation epidermal electronics.
研究领域:
生物医学工程
·
材料科学
·
电子皮肤
✓ 已验证
产品关联
DOI
高影响因子
Micromachines
·
2022
·Vol. 13
·期 3
·488
·
IF 3.523
Yun Wang,Mixia Wang,Yuchuan Dai,Yilin Song,Yiding Wang,Botao Lu,Yinghui Li,Xinxia Cai
Research on the intracerebral mechanism of insomnia induced by serotonin (5-HT) deficiency is indispensable. In order to explore the effect of 5-HT deficiency-induced insomnia on brain regions related to memory in rats, we designed and fabricated a microelectrode array that simultaneously detects the electrical activity of the dorsal raphe nucleus (DRN) and hippocampus in normal, insomnia and recovery rats in vivo. In the DRN and hippocampus of insomnia rats, our results showed that the spike amplitudes decreased by 40.16 and 57.92%, the spike repolarization slope decreased by 44.64 and 48.59%, and the spiking rate increased by 66.81 and 63.40%. On a mesoscopic scale, the increased firing rates of individual neurons led to an increased δ wave power. In the DRN and hippocampus of insomnia rats, the δ wave power increased by 57.57 and 67.75%. Furthermore, two segments’ δ wave slopes were also increased in two brain regions of the insomnia rats. Our findings suggest that 5-HT deficiency causes the hyperactivity of neurons in the hippocampus and DRN; the DRN’s firing rate and the hippocampal neuronal amplitude reflect insomnia in rats more effectively. Further studies on alleviating neurons affected by 5-HT deficiency and on achieving a highly effective treatment for insomnia by the microelectrode array are needed.Keywords:microelectrode array;insomnia;electrophysiology;dorsal raphe nucleus;serotonin
研究领域:
神经科学
·
电生理学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA
·
2017
·Vol. 163
·期 2
·140-149
·
IF 1.162
Yan-Chen Wang,Peng Li,De-Fu Chi
The leaf beetle Ambrostoma quadriimpressum Motschulsky (Coleoptera: Chrysomelidae) is distributed in China, Siberia, and elsewhere in northeastern Asia. This pest feeds only on buds and leaves of elm trees (Ulmaceae) and inhibits elm trees sprouting, increasing the risk of damage and destruction by other pests. We investigated selected plant compounds that could be used for the development of semiochemical-based push-pull methods for the control of this elm pest. Electroantennogram (EAG), Y-tube olfactometer, and wind tunnel bioassays were conducted to test the electrophysiological and behavioral response of A. quadriimpressum to nine individual volatiles and five essential oils. Individual volatiles and essential oils were selected based on their activity against insects in previous studies. The individual volatiles and essential oils were dissolved in dichloromethane and adsorbed by filter paper. Using a pipette, odor stimuli were delivered as 0.5-s puffs of air into a continuously humidified air stream in the odor delivery tube at 400 ml per min. Ambrostoma quadriimpressum adults display strong EAG responses to l mol l −1 isoeugenol, (1 R )-(+)-α-pinene, 1% pepper oil (derived from the pericarp of Piper chinense Miq.), and peppermint oil [derived from the aerial parts of Mentha haplocalyx (Briq.)] compared to the control. In behavioral assays conducted using a Y-tube olfactometer and a wind tunnel, adult beetles were attracted by (1 R )-(+)-α-pinene but repelled by 0.1% pepper oil. The results provide a basis for the development of a ‘push-pull’ strategy to manage A. quadriimpressum .
研究领域:
昆虫学
·
植物化学
·
害虫管理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 4
·992-1001
·
IF 6.331
Zihang Shen,Kaiyue Liu,Zheng Zhou,Qifang Li
This study proposes a simple method to prepare a pH-responsive and shape memory hydrogel based on cooperative hydrophobic interaction and hydrogen bonding. Acryloyl 11-aminoundecanoic acid (A11AUA) and acrylamide were selected as hydrophobic monomers and hydrophilic monomers, respectively. The mechanical properties of the prepared hydrogel strongly depend on the pH. Under acidic conditions, the maximum tensile strength of the hydrogel can reach 7.8 MPa, and the tensile modulus of the hydrogel can be increased by more than 10 000 times. The mechanical properties of acidic gels are affected by temperature and exhibit a temperature-controlled shape memory function. The acidic gel is immersed in NaOH and HCl solutions in sequence to achieve the function of reprogramming. Hydrogels under alkaline and neutral conditions exhibit conductivity and adhesion properties controlled by pH. Using the hydrogel as an adhesive electrode, the performance of the hydrogel in monitoring human electrophysiological signals was discussed.
研究领域:
材料科学
·
生物医学工程
·
生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Shitao Shi,Yuanyuan Wang,Qingyu Meng,Zhuyue Lan,Chencong Liu,Zhu Zhou,Qingfeng Sun,Xiaoping Shen
Here, a strategy to overcome the stiff and brittle nature of cellulose-derived carbon nanofibrils (CCNFs) is proposed through a facile, low-cost, and scalable approach. Flexible and conformal CCNFs with a low bending rigidity below 55.4 mN and tunable conductivities of 0.14–45.5 S m–1 are developed by introducing silanol as a multieffect additive in the electrospun hybrid nanofibrous network and subsequent carbonization at a relatively high temperature (900 °C) and chemical vapor deposition of polypyrrole (PPy) on the hybrid carbon nanofibril surface. Silica acts as a lubricant in each rigid carbon fiber to improve flexibility of the CCNF structure as well as a template during cellulose carbonization to prevent the melting of carbon nanofibrils. Meanwhile, the uniform coating of PPy leads to an improvement in electrical conductivity while conserving the porous structure and compressibility of the CCNF nets. These conductive hybrid CCNF films are evaluated as mechanoreceptors and physiological sensors, which are demonstrated to be applied in intelligent electronics including electronic skin, human–machine interfaces, and epidermic electrodes. The design or working principles of the hybrid CCNFs for achieving optimum applicable effects when applied in different scenarios are revealed.
研究领域:
材料科学
·
生物医学工程
·
电子皮肤技术
✓ 已验证
DOI
高影响因子
Interdisciplinary Materials
·
2024
·Vol. 3
·期 5
·775-790
·
IF 24.5
Xiaoxue Lin,Zeping Ou,Xuewei Wang,Can Wang,Yunfei Ouyang,Ibrahim M. Mwakitawa,Feng Li,Rui Chen,Yaru Yue,Jihe Tang,Wei Fang,Shanshan Chen,Bing Guo,Jianyong Ouyang,Tatyana Shumilova,Yongli Zhou,Liang Wang,Chengwu Zhang,Kuan Sun
Long-term biopotential monitoring requires high-performance biocompatible wearable dry electrodes. But currently, it is challenging to establish a form-preserving fit with the skin, resulting in high interface impedance and motion artifacts. This research aims to present an innovative solution using an all-green organic dry electrode that eliminates the aforementioned challenges. The dry electrode is prepared by introducing biocompatible maltitol into the chosen conductive polymer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate). Thanks to the secondary doping and plasticizer effect of maltitol, the dry electrode exhibits good stretchability (62%), strong self-adhesion (0.46 N/cm), high conductivity (102 S/cm), and low Young's modulus (7 MPa). It can always form a conformal contact with the skin even during body movements. Together with good electrical properties, the electrode enables a lower skin contact impedance compared to the current standard Ag/AgCl gel electrode. Consequently, the application of this dry electrode in bioelectrical signal measurement (electromyography, electrocardiography, electroencephalography) and long-term biopotential monitoring was successfully demonstrated.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Gongwei Tian,Yan Liu,Mei Yu,Cuiyuan Liang,Dan Yang,Jianping Huang,Qinyi Zhao,Wei Zhang,Jianhui Chen,Yu Wang,Ping Xu,Zhiyuan Liu,Dianpeng Qi
The drift or fall of stretchable neural microelectrodes from the surface of wet and dynamic tissues severely hampers the adoption of microelectrodes for electrophysiological signal monitoring. Endowing the stretchable electrodes with adhesive ability is an effective way to overcome these problems. Current adhesives form tough adhesion to tissues by covalent interaction, which decreases the biocompatibility of the adhesives. Here, we fabricate a strong electrostatic adhesive (noncovalent interaction), highly conformal, stretchable microelectrode arrays (MEAs) for the electrophysiological interface. This MEA was composed of polypyrrole (PPy) as the electrode material and hydrogel as the stretchable substrate [the cross-linked and copolymerized hydrogel of 2-acrylamido-2-methylpropane sulfonic acid (AMPS), gelatin, chitosan, 2-methoxyethyl acrylate, and acrylic acid is named PAGMA]. Strong and stable electrostatic adhesion (85 kPa) and high stretchability (100%) allow for the integration of PPy MEAs based on the PAGMA hydrogel substrate (PPy–PAGMA MEAs) on diverse wet dynamic tissues. Additionally, by adjusting the concentration of AMPS in PAGMA, the hydrogel (PAGMA-1) can produce tough adhesion to many inorganic and elastomer materials. Finally, the PPy–PAGMA MEAs were toughly and conformally adhered on the rat’s subcutaneous muscle and beating heart, and the rat’s electrophysiological signals were successfully recorded. The development of these adhesive MEAs offers a promising strategy to establish stable and compliant electrode–tissue interfaces.
研究领域:
生物医学工程
·
神经科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）