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https://www.readbyqxmd.com/read/28094903/evaluation-of-the-efficacy-of-insecticidal-coatings-based-on-teflutrin-and-chlorpyrifos-against-rhynchophorus-ferrugineus
#1
Massimo Pugliese, Alberto Rettori Andrea, Roberto Martinis, Khalid Al-Rohily, Velate Suresh, Moideen Mohamed Ashraf, Ali Al-Maashi
BACKGROUND: The date palm (Phoenix dactylifera L.) is an important economic resource for many nations worldwide, recently threatened by the presence of different insect pests, like the red palm weevil (RPW) Rhynchophorus ferrugineus. RESULTS: Two products, a glue (polyvinyl acetate) and an oil (raw linseed oil), have been used as coatings and applied together with a repellent and two insecticides (teflutrin and chlorpyrifos) at different dosages on 2 species of palm (Phoenix dactylifera and Phoenix canariensis)...
January 17, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28094471/cleanable-air-filter-transferring-moisture-and-effectively-capturing-pm2-5
#2
Xinglei Zhao, Yuyao Li, Ting Hua, Pan Jiang, Xia Yin, Jianyong Yu, Bin Ding
The lethal danger of particulate matter (PM) pollution on health leads to the development of challenging individual protection materials that should ideally exhibit a high PM2.5 purification efficiency, low air resistance, an important moisture-vapor transmission rate (MVTR), and an easy-to-clean property. Herein, a cleanable air filter able to rapidly transfer moisture and efficiently capture PM2.5 is designed by electrospinning superhydrophilic polyacrylonitrile/silicon-dioxide fibers as the adsorption-desorption vector for moisture-vapor, and hydrophobic polyvinylidene fluoride fibers as the repellent components to avoid the formation of capillary water under high humidity...
January 17, 2017: Small
https://www.readbyqxmd.com/read/28094274/folivory-elicits-a-strong-defense-reaction-in-catharanthus-roseus-metabolomic-and-transcriptomic-analyses-reveal-distinct-local-and-systemic-responses
#3
Thomas Dugé de Bernonville, Inês Carqueijeiro, Arnaud Lanoue, Florent Lafontaine, Paloma Sánchez Bel, Franziska Liesecke, Karine Musset, Audrey Oudin, Gaëlle Glévarec, Olivier Pichon, Sébastien Besseau, Marc Clastre, Benoit St-Pierre, Victor Flors, Stéphane Maury, Elisabeth Huguet, Sarah E O'Connor, Vincent Courdavault
Plants deploy distinct secondary metabolisms to cope with environment pressure and to face bio-aggressors notably through the production of biologically active alkaloids. This metabolism-type is particularly elaborated in Catharanthus roseus that synthesizes more than a hundred different monoterpene indole alkaloids (MIAs). While the characterization of their biosynthetic pathway now reaches completion, still little is known about the role of MIAs during biotic attacks. As a consequence, we developed a new plant/herbivore interaction system by challenging C...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28092626/the-impact-of-surface-geometry-cavitation-and-condensation-on-wetting-transitions-posts-and-reentrant-structures
#4
J R Panter, H Kusumaatmaja
The fundamental impacts of surface geometry on the stability of wetting states, and the transitions between them are elucidated for square posts and reentrant structures in three dimensions. We identify three principal outcomes of particular importance for future surface design of liquid-repellent surfaces. Firstly, we demonstrate and quantify how capillary condensation and vapour cavitation affect wetting state stabilities. At high contact angles, cavitation is enhanced about wide, closely-spaced square posts, leading to the existence of suspended states without an associated collapsed state...
January 16, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28091660/universal-wetting-transition-of-an-evaporating-water-droplet-on-hydrophobic-micro-and-nano-structures
#5
Adrien Bussonnière, Masoud B Bigdeli, Di-Yen Chueh, Qingxia Liu, Peilin Chen, Peichun Amy Tsai
Water-repellent, rough surfaces have a remarkable and beneficial wetting property: when a water droplet comes in contact with a small fraction of the solid, both liquid-solid adhesion and hydrodynamic drag are reduced. As a prominent example from nature, the lotus leaf-comprised of a wax-like material with micro- and nano-scaled roughness-has recently inspired numerous syntheses of superhydrophobic substrates. Due to the diverse applications of superhydrophobicity, much research has been devoted to the fabrication and investigations of hydrophobic micro-structures using established micro-fabrication techniques...
January 16, 2017: Soft Matter
https://www.readbyqxmd.com/read/28080213/campylobacter-jejuni-transducer-like-proteins-chemotaxis-and-beyond
#6
Kshipra Chandrashekhar, Issmat I Kassem, Gireesh Rajashekara
Chemotaxis, a process that mediates directional motility towards or away from chemical stimuli (chemoeffectors/ ligands that can be attractants or repellents) in the environment, plays an important role in the adaptation of Campylobacter jejuni to disparate niches. The chemotaxis system consists of core signal transduction proteins and methyl-accepting-domain-containing Transducer like proteins (Tlps). Ligands binding to Tlps relay a signal to chemotaxis proteins in the cytoplasm which initiate a signal transduction cascade, culminating into a directional flagellar movement...
January 12, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28079287/triarylmethane-dyes-for-artificial-repellent-cotton-fibers
#7
Adelina Vallribera, Ana Maria Montagut, Erik Gálvez, Rosa María Sebastián, Alexandr Shafir
Families of new hydrophobic and/or oleophobic triarylmethane dyes possessing long hydrocarbon or polyfluorinated chains have been prepared. When covalently grafted upon cotton fabric, these dyes give rise to a new type of colored superhydrophobic fibers.
January 12, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28078624/millipede-defensive-compounds-are-a-double-edged-sword-natural-history-of-the-millipede-parasitic-genus-myriophora-brown-diptera-phoridae
#8
John M Hash, Jocelyn G Millar, John M Heraty, James F Harwood, Brian V Brown
Toxic defensive secretions produced by millipedes in the orders Julida, Spirobolida, Spirostreptida, and Polydesmida are highly repellent to most vertebrate and invertebrate natural enemies, but a few insects have evolved mechanisms to overcome these defenses. We demonstrate that highly specialized parasitic phorid flies in the species-rich genus Myriophora use volatile millipede defensive compounds as kairomones for host location. Of the two predominant quinone components in the defensive blend of juliform millipedes, 2-methoxy-3-methyl-1,4-benzoquinone alone was sufficient to attract adult flies of both sexes; however, a combination of 2-methoxy-3-methyl-1,4-benzoquinone and 2-methyl-1,4-benzoquinone increased attractiveness nearly threefold...
January 11, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28073732/insecticide-resistance-in-anopheles-mosquitoes%C3%A2-additional-obstacles-in-the-battle-against-malaria
#9
A Rubert, L Guillon-Grammatico, J Chandenier, I Dimier-Poisson, G Desoubeaux
Mosquitoes of the genus Anopheles are malaria vectors in tropical areas and were of course designated as primary targets by programs for malaria control. Repellent sprays, indoor use of insecticides, and massive delivery of mosquito nets are standard examples of the means widely used to combat malaria. This synthetic review supplies an overview of all of the modes of resistance developed by Anopheles mosquitoes against these human actions. The misuse of each available tool has gradually led to a decrease in its global effectiveness...
November 1, 2016: Médecine et Santé Tropicales
https://www.readbyqxmd.com/read/28071885/transparent-superhydrophobic-surface-with-varied-surface-tension-responsiveness-in-wettability-based-on-tunable-porous-silica-structure-for-gauging-liquid-surface-tension
#10
Yan Wang, Yingjie Zhu, Chunyang Zhang, Jun Li, Zisheng Guan
Any solid surface can spontaneously exhibit variational wettability toward liquids with varied surface tension (γ). However, this correspondence has seldom been proposed or used on an artificial superhydrophobic surface, which should be more remarkable and peculiar. Herein, we fabricated robust, transparent superhydrophobic surfaces, utilizing acid-catalyzed/base-catalyzed silica (AC-silica and BC-silica) particles combined with candle soot template for structural construction and CVD process for chemical modifi-cation...
January 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28071872/mutant-botrocetin-2-inhibits-von-willebrand-factor-induced-platelet-agglutination
#11
T Matsui, A Hori, J Hamako, F Matsushita, Y Ozeki, Y Sakurai, M Hayakawa, M Matsumoto, Y Fujimura
BACKGROUND: Botrocetin-2 (Bot2) is a botrocetin-like protein composed of α and β subunits that have been cloned from the snake Bothrops jararaca. Bot2 binds specifically to von Willebrand factor (VWF), and the complex induces glycoprotein (GP) Ib-dependent platelet agglutination. OBJECTIVES: We exploited Bot2's VWF-binding capacity to try and create a mutant Bot2 that binds to VWF but inhibits platelet agglutination. METHODS AND RESULTS: Several point mutations were introduced into Bot2 cDNA, and the recombinant protein (rBot2) was purified on an anti-botrocetin column...
January 10, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28071048/solvent-free-strategy-yields-size-and-shape-uniform-capsules
#12
Ana M S Costa, João F Mano
Capsules with a liquefied core were fabricated via the assembly of polymeric droplets induced by superamphiphobic surfaces. These highly repellent substrates exhibit distinct features such as (i) an easy and precise control over the particle size and shape, (ii) a high encapsulation efficiency, (iii) mild processing conditions, and (iv) the possibility to include any object in either a water or oil-based liquid core, which are not found on the current available strategies. As proof of concept, a photo-cross-linkable derivative of chitosan was used to produce the polymeric shell while a wealth variety of template cores were tested using a reversible cross-linking mechanism, interfacial gelation process or ice...
January 13, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28069223/sustained-release-formulations-of-citronella-oil-nanoemulsion-using-cavitational-techniques
#13
Naveen Agrawal, Ganesh L Maddikeri, Aniruddha B Pandit
Nanoemulsion synthesis has proven to be an effective way for transportation of immobile, insoluble bioactive compounds. Citronella Oil (lemongrass oil), a natural plant extract, can be used as a mosquito repellent and has less harmful effects compared to its available market counterpart DEET (N, N-Diethyl-meta-toluamide). Nanoemulsion of citronella oil in water was prepared using cavitation-assisted techniques while investigating the effect of system parameters like HLB (Hydrophilic Lipophilic Balance), surfactant concentration, input energy density and mode of power input on emulsion quality...
May 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28068542/cost-effective-surface-modification-for-galinstan%C3%A2-lyophobicity
#14
Shantanu Shrikant Kadlaskar, Jun Hyeon Yoo, Abhijeet, Jeong Bong Lee, Wonjae Choi
In this paper we investigate the feasibility of using a cost-effective fabrication method based on sandblasting, chemical etching and spray coating processes, to render common surfaces to be non-wettable by Galinstan®. Although Galinstan® is a non-toxic liquid metal alternative to mercury, the viscoelastic and extremely wetting characteristics of Galinstan® have been the major bottleneck limiting the wide applicability of the gallium-based liquid metal. This paper tries to accomplish non-wettability to Galinstan® by combining surface texture and chemistry with the unique property of Galinstan®, that is, its high surface tension and yield strength that prevent the penetration of the liquid metal into surface asperities...
December 28, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28066972/efficacy-of-a-long-lasting-bifenthrin-treated-net-against-horticultural-pests-and-its-compatibility-with-the-predatory-mite-amblyseius-swirskii-and-the-parasitic-wasp-eretmocerus-mundus
#15
Mª Del Mar Fernández, Ignacio Colomer, Pilar Medina, Alberto Fereres, Pedro Del Estal, Elisa Viñuela
BACKGROUND: The insecticide-treated nets (ITNs) are being investigated lately for their use in agriculture. Depending on the insecticide, the hole size and the way they are produced, these nets can target different pests and therefore they could be interesting options to be used in Integrated Pest Management (IPM). As the information on their compatibility with beneficial fauna is practically negligible, in this work we have tested the compatibility of an experimental bifenthrin long lasting insecticide-treated net (LLITN) with Amblyseius swirskii and Eretmocerus mundus, important natural enemies of whiteflies and thrips, under laboratory, semi-field and commercial greenhouses...
January 9, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28064188/upset-the-drosophila-homologue-of-set3-is-required-for-viability-and-the-proper-balance-of-active-and-repressive-chromatin-marks
#16
Kyle A McElroy, Youngsook Lucy Jung, Barry M Zee, Charlotte I Wang, Peter J Park, Mitzi I Kuroda
Chromatin plays a critical role in faithful implementation of gene expression programs. Different post-translational modifications of histone proteins reflect the underlying state of gene activity, and many chromatin proteins write, erase, bind, or are repelled by these histone marks. One such protein is UpSET, the Drosophila homolog of yeast Set3 and mammalian KMT2E (MLL5). Here we show that UpSET is necessary for the proper balance between active and repressed states. Using CRISPR/Cas-9 editing, we generated S2 cells which are mutant for upset We found that loss of UpSET is tolerated in S2 cells, but that heterochromatin is misregulated, as evidenced by a strong decrease in H3K9me2 levels assessed by bulk histone post-translational modification quantification...
January 6, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28054589/large-scale-thick-self-assembled-nacre-mimetic-brick-walls-as-fire-barrier-coatings-on-textiles
#17
Paramita Das, Helga Thomas, Martin Moeller, Andreas Walther
Highly loaded polymer/clay nanocomposites with layered structures are emerging as robust fire retardant surface coatings. However, time-intensive sequential deposition processes, e.g. layer-by-layer strategies, hinders obtaining large coating thicknesses and complicates an implementation into existing technologies. Here, we demonstrate a single-step, water-borne approach to prepare thick, self-assembling, hybrid fire barrier coatings of sodium carboxymethyl cellulose (CMC)/montmorillonite (MTM) with well-defined, bioinspired brick-wall nanostructure, and showcase their application on textile...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28052361/the-properties-and-activity-of-tio2-beta-sic-nanocomposites-in-organic-dyes-photodegradation
#18
Katarzyna Pstrowska, Bartłomiej Maciej Szyja, Hanna Czapor-Irzabek, Adam Kiersnowski, Jerzy Walendziewski
The TiO2 /beta-SiC nanocomposites containing 0-25 wt. % of beta-SiC were synthesized by the sol-gel method and tested in the photodegradation of methylene blue and methyl orange water solutions. With the increase of SiC content, only a slight decrease in energy band gap was observed (3.19-3.12 eV), together with significant increase of the surface area of the catalysts (42.7-80.4 m(2) /g). In the synthesized material the anatase phase of TiO2 was present in the form of small agglomerates resulting from the mechanical mixing process...
January 4, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28045252/inorganic-adhesives-for-robust-superwetting-surfaces
#19
Mingming Liu, Jing Li, Yuanyuan Hou, Zhiguang Guo
Superwetting surfaces require micro-/nanohierarchical structures but are mechanically weak. Moreover, such surfaces are easily polluted by amphiphiles. In this work, inorganic adhesives are presented as a building block for construction of superwetting surfaces and to promote robustness. Nanomaterials can be selected as fillers to endow the functions. We adopted a simple procedure to fabricate underwater superoleophobic surfaces by spraying a titanium dioxide suspension combined with aluminum phosphate binder on stainless steel meshes...
January 5, 2017: ACS Nano
https://www.readbyqxmd.com/read/28045216/zika-virus-and-pregnancy-an-overview
#20
Newton Sérgio de Carvalho, Beatriz Freitas de Carvalho, Bruna Dóris, Evellyn Silverio Biscaia, Cyllian Arias Fugaça, Lúcia de Noronha
In May 2015, the first episodes of Zika virus infection of the Latin America were confirmed in Brazil, where currently 196 976 cases were reported. The main route of transmission occurs by Aedes mosquitoes, and the most common symptoms are maculopapular rash, fever, conjunctivitis, polyarthralgia, and periarticular edema. However, the infection is asymptomatic in 80% of the cases. The congenital infection is characterized when the transmission to the fetus occurs during pregnancy, but the mechanisms of how the virus infects the placenta remain unclear...
January 3, 2017: American Journal of Reproductive Immunology: AJRI
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