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https://www.readbyqxmd.com/read/28431083/repellent-effects-of-different-celery-varieties-in-bemisia-tabaci-hemiptera-aleyrodidae-biotype-q
#1
Hongtao Tu, Yuchuan Qin
Y-tube olfactometer and net cages experiments were used to investigate the repellent effects of different celery varieties in biotype Q of sweetpotato whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae), on cucumber, Cucumis sativus L. (Cucurbitaceae). Y-tube olfactometer tests showed that whiteflies have strong repellent behavior to different celery varieties. Intercropping different celery varieties with cucumbers had significant repellent effects and oviposition deterrent effects in whiteflies...
April 18, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28431028/hybrid-de-novo-genome-assembly-of-the-chinese-herbal-fleabane-erigeron-breviscapus
#2
Jing Yang, Guanghui Zhang, Jing Zhang, Hui Liu, Wei Chen, Xiao Wang, Yahe Li, Yang Dong, Shengchao Yang
Background: The plants in the Erigeron genus of the Compositae (Asteraceae) family are commonly called fleabanes, possibly due to the belief that certain chemicals in these plants repel fleas. In the traditional Chinese medicine, Erigeron breviscapus , which is native to China, was widely used in the treatment of cerebrovascular disease. A handful of bioactive compounds, including scutellarin, 3,5-dicaffeoylquinic acid, and 3,4-dicaffeoylquinic acid, have been isolated from the plant...
April 18, 2017: GigaScience
https://www.readbyqxmd.com/read/28429819/effects-of-dielectrophoresis-on-thrombogenesis-in-human-whole-blood
#3
Steven Kinio, James Mills
Thrombogenesis (blood clot formation) is a major barrier to the development of biomedical devices that interface with blood. Although state-of-the-art chemically and pharmacologically mediated clot mitigation strategies are effective, some limitations of such approaches include depletion of active agents, or adverse reactions in patients. Increased clotting protein adsorption and platelet adhesion, which occurs when artificial surfaces are exposed to blood, results in enhanced clot formation on artificial surfaces...
April 21, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28429416/modulation-of-heterotypic-and-homotypic-cell-cell-interactions-via-zwitterionic-lipid-masks
#4
Matthew Park, Wongu Youn, Doyeon Kim, Eun Hyea Ko, Beom Jin Kim, Sung Min Kang, Kyungtae Kang, Insung S Choi
Since the pioneering work by Whitesides, innumerable platforms that aim to spatio-selectively seed cells and control the degree of cell-cell interactions in vitro have been developed. These methods, however, have generally been technically and methodologically complex, or demanded stringent materials and conditions. In this work, we introduce zwitterionic lipids as patternable, cell-repellant masks for selectively seeding cells. The lipid masks are easily removed with a routine washing step under physiological conditions (37 °C, pH 7...
April 21, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28427437/efficacy-and-user-acceptability-of-transfluthrin-treated-sisal-and-hessian-decorations-for-protecting-against-mosquito-bites-in-outdoor-bars
#5
John P Masalu, Marceline Finda, Fredros O Okumu, Elihaika G Minja, Arnold S Mmbando, Maggy T Sikulu-Lord, Sheila B Ogoma
BACKGROUND: A number of mosquito vectors bite and rest outdoors, which contributes to sustained residual malaria transmission in endemic areas. Spatial repellents are thought to create a protective "bubble" within which mosquito bites are reduced and may be ideal for outdoor use. This study builds on previous studies that proved efficacy of transfluthrin-treated hessian strips against outdoor biting mosquitoes. The goal of this study was to modify strips into practical, attractive and acceptable transfluthrin treated sisal and hessian emanators that confer protection against potential infectious bites before people use bed nets especially in the early evening and outdoors...
April 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28426195/one-step-fabrication-of-non-fluorinated-transparent-super-repellent-surfaces-with-tunable-wettability-functioning-both-in-air-and-oil
#6
Mengying Long, Shan Peng, Xiaojun Yang, Wanshun Deng, Ni Wen, Kai Miao, Gongyun Chen, Xinrui Miao, Wenli Deng
In this paper, we have developed a one-step thermal treatment of polydimethylsiloxane (PDMS) liquid to create transparent super-repellent surface (TSS) and super-repellent powder. They are super-repellent toward water and ethylene glycol. During the one-step thermal treatment, PDMS soot generated and deposited onto glass slide (GS) surface to fabricate the TSS without fluorosilane modification. The facilely obtained TSS presented superhydrophobicity and self-cleaning property when immersed into very low-surface-tension oils such as petroleum ether, hexadecane, peanut oil, and dodecane...
April 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28425475/insecticidal-activity-of-garlic-essential-oil-and-their-constituents-against-the-mealworm-beetle-tenebrio-molitor-linnaeus-coleoptera-tenebrionidae
#7
Angelica Plata-Rueda, Luis Carlos Martínez, Marcelo Henrique Dos Santos, Flávio Lemes Fernandes, Carlos Frederico Wilcken, Marcus Alvarenga Soares, José Eduardo Serrão, José Cola Zanuncio
This study evaluated the insecticidal activity of garlic, Allium sativum Linnaeus (Amaryllidaceae) essential oil and their principal constituents on Tenebrio molitor. Garlic essential oil, diallyl disulfide, and diallyl sulfide oil were used to compare the lethal and repellent effects on larvae, pupae and adults of T. molitor. Six concentrations of garlic essential oil and their principal constituents were topically applied onto larvae, pupae and adults of this insect. Repellent effect and respiration rate of each constituent was evaluated...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28423430/bioactivity-of-novel-botanical-insecticide-from-gnidia-kaussiana-thymeleaceae-against-callosobruchus-maculatus-coleoptera-chrysomelidae-in-stored-vigna-subterranea-fabaceae-grains
#8
D Kosini, E N Nukenine
Hexane, acetone, and methanol extracts from Gnidia kaussiana Meisn (Thymeleaceae), each at two dosages (0.2 and 1 ml/50 g grains corresponding, respectively to 1 and 5g/kg), and neem seed oil (NSO), used as standard insecticide were evaluated for repellence, toxicity to Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae) adults, F1 progeny inhibition, persistence and as grain protectant during storage. Experiments were laid out at complete randomized design with five replications for repellence test and four for others...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28423421/efficacy-of-some-wearable-devices-compared-with-spray-on-insect-repellents-for-the-yellow-fever-mosquito-aedes-aegypti-l-diptera-culicidae
#9
Stacy D Rodriguez, Hae-Na Chung, Kristina K Gonzales, Julia Vulcan, Yiyi Li, Jorge A Ahumada, Hector M Romero, Mario De La Torre, Fangjun Shu, Immo A Hansen
The current Zika health crisis in the Americas has created an intense interest in mosquito control methods and products. Mosquito vectors of Zika are of the genus Aedes, mainly the yellow fever mosquito, Aedes aegypti. L. The use of repellents to alter mosquito host seeking behavior is an effective method for the prevention of mosquito-borne diseases. A large number of different spray-on repellents and wearable repellent devices are commercially available. The efficacies of many repellents are unknown. This study focuses on the efficacy of eleven different repellents in reducing the number of Ae...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28421741/uphill-water-transport-on-a-wettability-patterned-surface-experimental-and-theoretical-results
#10
Yuji Hirai, Hiroyuki Mayama, Yasutaka Matsuo, Masatsugu Shimomura
In nature, there exist a number of functional water-controlling surfaces, such as the water-repellent surface of lotus leaves, the superhydrophobic water-adhesive surface of rose petals, the water-harvesting surface of a beetle's back, and the water-transporting surface of the legs of Ligia exotica. These natural surfaces suggest that surface chemistry and hierarchical structures are essential for controlling water behavior. We have reported the preparation of superhydrophobic and anti-reflection silicon nanospike-array structures using self-organized honeycomb-patterned films as 3D dry etching masks...
April 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28419272/insecticidal-and-behavioral-avoidance-responses-of-anopheles-minimus-and-culex-quinquefasciatus-diptera-culicidae-to-three-synthetic-repellents
#11
Wasana Boonyuan, Sunaiyana Sathantriphop, Krajana Tainchum, Vithee Muenworn, Atchariya Prabaripai, Michael J Bangs, Theeraphap Chareonviriyaphap
Escape responses, knockdown (KD), and toxicity of laboratory strains of Anopheles minimus Theobald and Culex quinquefasciatus Say to three synthetic mosquito repellents, DEET (N, N-diethyl-3-methylbenzamide), IR3535, or picaridin, at 5% v/v concentrations, were evaluated using repellent-treated papers in standard WHO tube assays and an excito-repellency (ER) test chamber system. The tube assays recorded knockdown effects of each repellent immediately after 30-min exposure and the final morality following a 24-h holding period...
April 15, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28416215/stir-bar-sorptive-extraction-and-liquid-chromatography-tandem-mass-spectrometry-determination-of-polar-and-non-polar-emerging-and-priority-pollutants-in-environmental-waters
#12
Irene Aparicio, Julia Martín, Juan Luis Santos, José Luis Malvar, Esteban Alonso
An analytical method based on stir bar sorptive extraction (SBSE) was developed and validated for the determination of environmental concern pollutants in environmental waters by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Target compounds include six water and oil repellents (perfluorinated compounds), four preservatives (butylated hydroxytoluene and three parabens), two plasticizers (bisphenol A and di(2-ethylhexyl)phthalate), seven surfactants (four linear alkylbenzene sulfonates, nonylphenol and two nonylphenol ethoxylates), a flame retardant (hexabromocyclododecane), four hormones, fourteen pharmaceutical compounds, an UV-filter (2-ethylhexyl 4-methoxycinnamate) and nine pesticides...
April 7, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28415205/cross-symmetric-dipolar-matter-wave-solitons-in-double-well-chains
#13
Zhiwei Fan, Yuhan Shi, Yan Liu, Wei Pang, Yongyao Li, Boris A Malomed
We consider a dipolar Bose-Einstein condensate trapped in an array of two-well systems with an arbitrary orientation of the dipoles relative to the system's axis. The system can be built as a chain of local traps sliced into two parallel lattices by a repelling laser sheet. It is modeled by a pair of coupled discrete Gross-Pitaevskii equations, with dipole-dipole self-interactions and cross interactions. When the dipoles are not polarized perpendicular or parallel to the lattice, the cross interaction is asymmetric, replacing the familiar symmetric two-component discrete solitons by two new species of cross-symmetric ones, viz...
March 2017: Physical Review. E
https://www.readbyqxmd.com/read/28414423/robust-fluorine-free-superhydrophobic-amino-silicone-oil-sio2-modification-of-electrospun-polyacrylonitrile-membranes-for-waterproof-breathable-application
#14
Junlu Sheng, Yue Xu, Jianyong Yu, Bin Ding
Superhydrophobic waterproof-breathable membranes have attracted considerable interest owing to their multifunctional applications in self-cleaning, anti-icing, anticorrosion, outdoor tents, and protective clothing. Despite the researches pertaning to the construction of superhydrophobic functional membranes by nanoparticle finishing have increased drastically, the disconnected particle component is easy to fall off from the membranes under deformation and wear conditions, which has restricted their wide use in practice...
April 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28413237/in-space-and-time-territorial-animals-are-attracted-to-conspecific-chemical-cues
#15
Stephanie M Campos, Chloe Strauss, Emília P Martins
Territorial animals lay scent marks around their territories to broadcast their presence, but these olfactory signals can both attract and repel con-specifics. Attraction or aversion can have a profound impact in terms of space use and thereby influence an individual's access to resources and mates. Here, we test the impact of chemical signals on the long-term space use and activity of receivers, comparing the response of males and females, territory holders, and temporary visitors in Sceloporus undulatus lizards in the field...
February 2017: Ethology: Formerly Zeitschrift Für Tierpsychologie
https://www.readbyqxmd.com/read/28412413/activation-of-muscarinic-receptors-prevents-tnf-%C3%AE-mediated-intestinal-epithelial-barrier-disruption-through-p38-mapk
#16
Junsuke Uwada, Takashi Yazawa, Md Tariqul Islam, Md Rafiqul Islam Khan, Susanne M Krug, Michael Fromm, Shin-Ichiro Karaki, Yuichi Suzuki, Atsukazu Kuwahara, Hatsumi Yoshiki, Kiyonao Sada, Muramatsu, Takanobu Taniguchi
Intestinal epithelial cells form a tight barrier to act as selective physical barriers, repelling hostile substances. Tumor necrosis factor-α (TNF-α) is a well characterized pro-inflammatory cytokine which can compromise intestinal barrier function and the suppression of TNF-α function is important for treatment of inflammatory bowel disease (IBD). In this study, we investigated the contribution of G-protein-coupled receptor (GPCR)-induced signalling pathways to the maintenance of epithelial barrier function...
April 12, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28409938/molting-materials-restoring-superhydrophobicity-after-severe-damage-via-snakeskin-like-shedding
#17
Roland Hönes, Vitaliy Kondrashov, Jürgen Rühe
Superhydrophobic surfaces require extremely rough micro-/nanostructures, but these are easily damaged, especially by scratching with sharp objects. Then, water repellency will be lost depending on the degree of destruction. We introduce a novel approach to restore the original surface properties after mechanical damage: skin shedding. This is demonstrated with a three-layer stack as a proof-of-principle system: When the original, superhydrophobic surface layer is damaged, this leads to dissolution of a sacrificial layer below...
April 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28407425/antifouling-and-antimicrobial-biomaterials-an-overview
#18
REVIEW
Iolanda Francolini, Claudia Vuotto, Antonella Piozzi, Gianfranco Donelli
The use of implantable medical devices is a common and indispensable part of medical care for both diagnostic and therapeutic purposes. However, as side effect, the implant of medical devices quite often leads to the occurrence of difficult-to-treat infections, as a consequence of the colonization of their abiotic surfaces by biofilm-growing microorganisms increasingly resistant to antimicrobial therapies. A promising strategy to combat device-related infections is based on anti-infective biomaterials that either repel microbes, so they cannot attach to the device surfaces, or kill them in the surrounding areas...
April 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28407077/chemosensory-responses-to-the-repellent-nepeta-essential-oil-and-its-major-component-nepetalactone-by-aedes-aegypti-diptera-culicidae-a-vector-of-zika-virus
#19
Jackson T Sparks, Jonathan D Bohbot, Mihailo Ristic, Danijela Mišic, Marijana Skoric, Autar Mattoo, Joseph C Dickens
Nepeta essential oil (Neo; catnip) and its major component, nepetalactone, have long been known to repel insects including mosquitoes. However, the neural mechanisms through which these repellents are detected by mosquitoes, including the yellow fever mosquito Aedes aegypti (L.), an important vector of Zika virus, were poorly understood. Here we show that Neo volatiles activate olfactory receptor neurons within the basiconic sensilla on the maxillary palps of female Ae. aegypti. A gustatory receptor neuron sensitive to the feeding deterrent quinine and housed within sensilla on the labella of females was activated by both Neo and nepetalactone...
April 12, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28406996/ultrasensitivity-and-fluctuations-in-the-barkai-leibler-model-of-chemotaxis-receptors-in-escherichia-coli
#20
Ushasi Roy, Manoj Gopalakrishnan
A stochastic version of the Barkai-Leibler model of chemotaxis receptors in Escherichia coli is studied here with the goal of elucidating the effects of intrinsic network noise in their conformational dynamics. The model was originally proposed to explain the robust and near-perfect adaptation of E. coli observed across a wide range of spatially uniform attractant/repellent (ligand) concentrations. In the model, a receptor is either active or inactive and can stochastically switch between the two states. The enzyme CheR methylates inactive receptors while CheB demethylates active receptors and the probability for a receptor to be active depends on its level of methylation and ligand occupation...
2017: PloS One
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