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https://www.readbyqxmd.com/read/29346533/density-of-emerald-ash-borer-coleoptera-buprestidae-adults-and-larvae-at-three-stages-of-the-invasion-wave
#1
Stephen J Burr, Deborah G McCullough, Therese M Poland
Emerald ash borer (EAB) (Agrilus planipennis Fairmaire) (Coleoptera: Buprestidae), an invasive phloem-feeding buprestid, has killed hundreds of millions of ash (Fraxinus spp.) trees in the United States and two Canadian provinces. We evaluated EAB persistence in post-invasion sites and compared EAB adult captures and larval densities in 24 forested sites across an east-west gradient in southern Michigan representing the Core (post-invasion), Crest (high EAB populations), and Cusp (recently infested areas) of the EAB invasion wave...
January 16, 2018: Environmental Entomology
https://www.readbyqxmd.com/read/29316463/electrochemical-and-microbial-community-responses-of-electrochemically-active-biofilms-to-copper-ions-in-bioelectrochemical-systems
#2
Yaping Zhang, Guanqun Li, Jing Wen, Yangao Xu, Jian Sun, Xun-An Ning, Xingwen Lu, Yujie Wang, Zuoyi Yang, Yong Yuan
Heavy metals play an important role in the conductivity of solution, power generation and activity of microorganisms in bioelectrochemical systems (BESs). However, effect of heavy metal on the process of exoelectrogenesis metabolism and extracellular electron transfer of electrochemically active biofilms (EABs) was poorly understood. Herein, we investigated the impact of Cu2+ at gradually increasing concentration on the morphological and electrochemical performance and bacterial communities of anodic biofilms in mixed-culture BESs...
January 5, 2018: Chemosphere
https://www.readbyqxmd.com/read/29315952/liquid-chromatography-mass-spectrometry-for-the-detection-of-ash-tree-metabolites-following-emerald-ash-borer-infestation
#3
Naomi L Stock, Michael C Doran, Ron F Bonner, Raymond E March
RATIONALE: The Emerald Ash Borer (EAB), Agrilus planipennis, an invasive insect detected in the U.S.A. and Canada in 2002, is a threat to ash trees with both ecological and economic implications. Early detection of EAB-infestation is difficult due to lack of visible signs and symptoms in the early stages of attack, but is essential to prevent ash mortality. An efficient and reliable tool for the early detection of EAB-infestation would be advantageous. METHODS: A mass spectrometry-based metabolomics approach, using liquid chromatography-mass spectrometry (LC-MS), has been used to investigate the leaf metabolites of both healthy and EAB-infested trees...
January 5, 2018: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/29306785/structure-function-insights-into-chikungunya-virus-capsid-protein-small-molecules-targeting-capsid-hydrophobic-pocket
#4
Rajesh Sharma, Pooja Kesari, Pravindra Kumar, Shailly Tomar
The crystal structure of chikungunya (CHIKV) virus capsid protease domain has been determined at 2.2Å. Structure reveals a chymotrypsin-like protease fold with a conserved hydrophobic pocket in CHIKV capsid protein (CP) for interaction with the cytoplasmic tail of E2 (cdE2) similar to the capsid protein of other alphaviruses. Molecular contacts between CP-cdE2 were determined by fitting structures of CHIKV CP and cdE2 into the cryo-EM map of Venezuelan equine encephalitis virus (VEEV). Binding of (S)-(+)-Mandelic acid (MDA) and Ethyl 3-aminobenzoate (EAB) to the hydrophobic pocket of CP was evaluated by molecular docking...
January 4, 2018: Virology
https://www.readbyqxmd.com/read/29197053/film-forming-ability-of-collagen-hydrolysate-extracted-from-leather-solid-wastes-with-chitosan
#5
Buğra Ocak
Discharges of huge quantities of leather solid wastes by leather industries and the increased use of synthetic packaging films have raised serious concerns on account of their environmental impacts. The paper focuses on the development and characterization of potential environmentally friendly composite films using collagen hydrolysate (CH) extracted from leather solid wastes and chitosan (C) to assess the feasibility of producing polymeric materials suitable for applications in packaging and wrapping purposes...
December 1, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29175523/improved-mechanical-properties-and-thermal-stability-of-collagen-fiber-based-film-bycrosslinking-with-casein-keratin-or-spi-effect-of-crosslinking-process-and-concentrations-of-proteins
#6
Xiaomeng Wu, Anjun Liu, Wenhang Wang, Ran Ye
This study utilized three different thermo-stable proteins of casein, keratin and soy protein isolate (SPI) to improve the thermal stabilities and mechanical properties of collagen fiber films using transglutaminase (TGase) crosslinking. The crosslinking greatly enhanced the thermal- stability of collagen fiber films, especially that of the collagen fiber crosslinking with 50% casein composite films, judged from thermogravimetric analysis (TGA). Furthermore, the TGase treatment improved the mechanical properties of the collagen fiber films interms of tensile strength (TS) and elongation at break (EAB)...
November 23, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29139298/sic-nanofiber-mat-a-broadband-microwave-absorber-and-the-alignment-effect
#7
Yi Hou, Laifei Cheng, Yani Zhang, Yong Yang, Chaoran Deng, Zhihong Yang, Qi Chen, Xiaoqing Du, Lianxi Zheng
Fiber alignment is a key factor that determines the physical properties of nanofiber mats. In this work, SiC nanofiber mats with or without fiber alignment are fabricated via electrospinning and the microwave electromagnetic (EM) properties of their silicone resin composites (5wt.%) are investigated in 2-18 GHz. By comparing with the composite containing smashed nanofiber, it is found that the nanofiber mats show superior dielectric loss and a minimal reflection loss (RL) of around -49 dB at 8.6 GHz and 4.3 mm thickness, associated with a broad effective absorption (<-10 dB) bandwidth (EAB) of about 7...
November 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29137776/effect-of-ultrasound-treatment-on-the-properties-of-nano-emulsion-films-obtained-from-hazelnut-meal-protein-and-clove-essential-oil
#8
Osman Gul, Furkan Turker Saricaoglu, Aysegul Besir, Ilyas Atalar, Fehmi Yazici
Hazelnut meal protein (4% (w/v)) and clove essential oil (CEO) (3% (v/v)) were homogenized with ultrasound (US) at different times (2, 4 and 6 min) and amplitudes (50, 75 and 100%) to obtain nano-emulsion films. Film forming nano-emulsions (FFNs) were analyzed for average particle size (Dz) and zeta potential, and edible film characterization were evaluated depending on US treatment, as well as antibacterial and antioxidant activities. Dz values and zeta potential of FFNs decreased with increasing acoustic energy delivered to nano-emulsion system...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29113886/physico-mechanical-properties-of-gelatin-films-modified-with-lysine-arginine-and-histidine
#9
Junjie Lin, Ying Wang, Daodong Pan, Yangying Sun, Changrong Ou, Jinxuan Cao
The aim of this work was to evaluate the plasticizing effect of Lysine (Lys), Arginine (Arg) and Histidine (His) on gelatin films. Gelatin films incorporated with Lys, Arg and His at different levels (0, 0.5 and 1.0%) were prepared. The films without amino acids were prepared as controls. The addition of Lys increased the elongation at break (EAB) but decreased the tensile strength (TS) compared to the control, especially at 1.0% incorporated level. Arg had cross-linking effect on gelatin films through hydrogen bonds demonstrated by FTIR Analysis, which increased TS of the films...
November 4, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29111045/physical-properties-and-antioxidant-capacity-of-chitosan-epigallocatechin-3-gallate-films-reinforced-with-nano-bacterial-cellulose
#10
Xuejiao Wang, Yumei Xie, Hanjing Ge, Lin Chen, Jiali Wang, Shuang Zhang, Yan Guo, Zhixi Li, Xianchao Feng
Films with antioxidant activity were prepared by combining chitosan (CH) and epigallocatechin-3-gallate (EGCG) with nano-bacterial cellulose (BC) as a reinforcement agent. Results showed that BC addition improved the qualities of films jeopardized by EGCG. Fourier Transform Infrared (FTIR) spectroscopy analysis confirmed that there were intermolecular interactions among BC, CH and EGCG though hydrogen bonding. Consequently, BC addition increased the crystallinity and thermal stability of CH-BC5/10-EGCG15/30 films analyzed by X-ray diffraction (XRD) and thermogravimetric (TGA) analysis...
January 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29075473/climate-variation-alters-the-synchrony-of-host-parasitoid-interactions
#11
Miles T Wetherington, David E Jennings, Paula M Shrewsbury, Jian J Duan
Observed changes in mean temperature and increased frequency of extreme climate events have already impacted the distributions and phenologies of various organisms, including insects. Although some research has examined how parasitoids will respond to colder temperatures or experimental warming, we know relatively little about how increased variation in temperature and humidity could affect interactions between parasitoids and their hosts. Using a study system consisting of emerald ash borer (EAB), Agrilus planipennis, and its egg parasitoid Oobius agrili, we conducted environmentally controlled laboratory experiments to investigate how increased seasonal climate variation affected the synchrony of host-parasitoid interactions...
October 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29053677/building-double-decker-traps-for-early-detection-of-emerald-ash-borer
#12
Deborah G McCullough, Therese M Poland
Emerald ash borer (EAB) (Agrilus planipennis Fairmaire), the most destructive forest insect to have invaded North America, has killed hundreds of millions of forest and landscape ash (Fraxinus spp.) trees. Several artificial trap designs to attract and capture EAB beetles have been developed to detect, delineate, and monitor infestations. Double-decker (DD) traps consist of two corrugated plastic prisms, one green and one purple, attached to a 3 m tall polyvinyl chloride (PVC) pipe supported by a t-post. The green prism at the top of the PVC pipe is baited with cis-3-hexenol, a compound produced by ash foliage...
October 4, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29017395/electrical-support-during-outdoor-cycling-in-patients-with-coronary-artery-disease-impact-on-exercise-intensity-volume-and-perception-of-effort
#13
Dominique Hansen, An Soors, Valerie Deluyker, Ines Frederix, Paul Dendale
BACKGROUND: Electrical assisted bicycles (EAB's) could be used to overcome barriers and difficulties to outdoor cycling and thus assist in achieving a sufficient physical activity level in coronary artery disease (CAD) patients, but it is unknown whether sufficient exercise intensities and volumes could be elicited during cycling on EAB's. In this study we examined, for the first time, the acute physiological impact of electrical support during outdoor cycling in CAD patients (ISRCTN32238279)...
October 10, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28980312/neural-stem-progenitor-cells-are-activated-during-tail-regeneration-in-the-leopard-gecko-eublepharis-macularius
#14
Eab Gilbert, M K Vickaryous
As for many lizards, the leopard gecko (Eublepharis macularius) can self-detach its tail to avoid predation and then regenerate a replacement. The replacement tail includes a regenerated spinal cord with a simple morphology: an ependymal layer surrounded by nerve tracts. We hypothesized that cells within the ependymal layer of the original spinal cord include populations of neural stem/progenitor cells (NSPCs) that contribute to the regenerated spinal cord. Prior to tail loss, we performed a bromodeoxyuridine pulse-chase experiment and found that a subset of ependymal layer cells (ELCs) were label-retaining after a 140-day chase period...
October 4, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28903607/candida-endocarditis-systematic-literature-review-from-1997-to-2014-and-analysis-of-29-cases-from-the-italian-study-of-endocarditis
#15
Simone Giuliano, Maurizio Guastalegname, Alessandro Russo, Marco Falcone, Veronica Ravasio, Marco Rizzi, Matteo Bassetti, Pierluigi Viale, Maria Bruna Pasticci, Emanuele Durante-Mangoni, Mario Venditti
Candida Endocarditis (CE) is a deadly disease. It is of paramount importance to assess risk factors for acquisition of both Candida native (NVE) and prosthetic (PVE) valve endocarditis and relate clinical features and treatment strategies with the outcome of the disease. Areas covered: We searched the literature using the Pubmed database. Cases of CE from the Italian Study on Endocarditis (SEI) were also included. Overall, 140 cases of CE were analyzed. Patients with a history of abdominal surgery and antibiotic exposure had higher probability of developing NVE than PVE...
September 14, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/28866443/subminimal-inhibitory-concentration-sub-mic-of-antibiotic-induces-electroactive-biofilm-formation-in-bioelectrochemical-systems
#16
Lean Zhou, Tian Li, Jingkun An, Chengmei Liao, Nan Li, Xin Wang
Electroactive biofilms (EABs) generated from mixed inocula are attractive due to their unique direct extracellular electron transfer abilities and potential use in water pollution control. In this study, for the first time, we identified a chemical that can be used for EAB regulation (both inhibition and promotion). We confirmed that tobramycin, an antibiotic previously demonstrated to inhibit the activity of EABs, is an agonist of EAB formation at subminimal inhibitory concentrations (sub-MICs). Compared to the control, at tobramycin concentrations of 0...
November 15, 2017: Water Research
https://www.readbyqxmd.com/read/28799331/flexible-sic-si3n4-composite-nanofibers-with-in-situ-embedded-graphite-for-highly-efficient-electromagnetic-wave-absorption
#17
Peng Wang, Laifei Cheng, Yani Zhang, Litong Zhang
SiC/Si3N4 composite nanofibers with in situ embedded graphite, which show highly efficient electromagnetic (EM) wave absorption performance in gigahertz frequency, were prepared by electrospinning with subsequent polymer pyrolysis and annealing. By means of incorporating graphite and Si3N4 into SiC, the EM wave absorption properties of the nanofibers were improved. The relationship among processing, fiber microstructure, and their superior EM wave absorption performance was systematically investigated. The EM wave absorption capability and effective absorption bandwidth (EAB) of nanofibers can be simply controlled by adjusting annealing atmosphere and temperature...
August 30, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28752407/variation-in-the-volatile-profiles-of-black-and-manchurian-ash-in-relation-to-emerald-ash-borer-oviposition-preferences
#18
Chad M Rigsby, Nathaniel B McCartney, Daniel A Herms, James H Tumlinson, Don Cipollini
Emerald ash borer (EAB; Agrilus planipennis) is a devastating pest of ash (Fraxinus spp.) in its invaded range in North America. Its coevolved Asian hosts are more resistant and less preferred for oviposition than susceptible North American species. We compared EAB oviposition preferences and bark and canopy volatile organic compound (VOC) emissions of resistant Manchurian ash and susceptible black ash, and examined relationships between VOC profiles and oviposition. In the field, black ash was highly preferred for oviposition while no eggs were laid on Manchurian ash, and we found clear differences in the VOC profiles of Manchurian and black ash...
August 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28745865/electroactive-biofilms-for-sensing-reflections-and-perspectives
#19
Antonin Prévoteau, Korneel Rabaey
Microbial electrochemistry has from the onset been recognized for its sensing potential due to the microbial ability to enhance signals through metabolic cascades, its relative selectivity toward substrates, and the higher stability conferred by the microbial ability to self-replicate. The greatest challenge has been to achieve stable and efficient transduction between a microorganism and an electrode surface. Over the past decades, a new kind of microbial architecture has been observed to spontaneously develop on polarized electrodes: the electroactive biofilm (EAB)...
August 25, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28671824/exclusive-extracellular-bioreduction-of-methyl-orange-by-azo-reductase-free-geobacter-sulfurreducens
#20
Yi-Nan Liu, Feng Zhang, Jie Li, Dao-Bo Li, Dong-Feng Liu, Wen-Wei Li, Han-Qing Yu
Azo dyes are a class of recalcitrant organic pollutants causing severe environmental pollution. For their biodecolorization, the azo reductase system was considered as the major molecular basis in bacteria. However, the intracellular localization of azo reductase limits their function for efficient azo dye decolorization. This limitation may be circumvented by electrochemically active bacteria (EAB) which is capable of extracellular respiration. To verify the essential role of extracellular respiration in azo dye decolorization, Geobacter sulfurreducens PCA, a model EAB, was used for the bioreduction of methyl orange (MO), a typical azo dye...
July 14, 2017: Environmental Science & Technology
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