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https://www.readbyqxmd.com/read/29150804/using-citrus-aurantifolia-essential-oil-for-the-potential-biocontrol-of-colocasia-esculenta-taro-leaf-blight-caused-by-phytophthora-colocasiae
#1
Séverin Nguemezi Tchameni, Staelle Njamou Mbiakeu, Modeste Lambert Sameza, Pierre Michel Dongmo Jazet, François Tchoumbougnang
The aim of this work was to evaluate the antimicrobial activities of leaves and epicarp of Citrus aurantifolia essential oil against Phytophthora colocasiae, the causative agent of taro leaf blight. Oils were extracted by hydrodistillation, and their chemical composition was determined by gas chromatography and gas chromatography coupled with mass spectrometry. Antimicrobial activities of oils were tested in vitro against mycelium growth and sporangium production. In situ tests were done on healthy taro leaves, and the necrosis symptoms were evaluated...
November 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29150612/health-impact-of-e-cigarettes-a-prospective-3-5-year-study-of-regular-daily-users-who-have-never-smoked
#2
Riccardo Polosa, Fabio Cibella, Pasquale Caponnetto, Marilena Maglia, Umberto Prosperini, Cristina Russo, Donald Tashkin
Although electronic cigarettes (ECs) are a much less harmful alternative to tobacco cigarettes, there is concern as to whether long-term ECs use may cause risks to human health. We report health outcomes (blood pressure, heart rate, body weight, lung function, respiratory symptoms, exhaled breath nitric oxide [eNO], exhaled carbon monoxide [eCO], and high-resolution computed tomography [HRCT] of the lungs) from a prospective 3.5-year observational study of a cohort of nine daily EC users (mean age 29.7 (±6...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150378/enhanced-antibacterial-effects-of-green-synthesized-zno-nps-using-aristolochia-indica-against-multi-drug-resistant-bacterial-pathogens-from-diabetic-foot-ulcer
#3
Katherin Steffy, G Shanthi, Anson S Maroky, S Selvakumar
BACKGROUND: Increased incidence of Multi-drug resistance in microorganisms has become the greatest challenge in the treatment of Diabetic Foot Ulcer (DFU) and urges the need of a new antimicrobial agent. In this study, we determined the bactericidal effects of ZnO nanoparticles (ZnO NPs) green synthesized from Aristolochia indica against Multi-drug Resistant Organisms (MDROs) isolated from pus samples of DFU patients attending in a tertiary care hospital in South India. METHODS: ZnO NPs were characterized by UV-vis-DRS spectroscopy, Atomic Force Microscopy (AFM), Transmission Electron Microscopy (TEM) and for its zeta potential value...
November 14, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/29150174/a-new-species-of-discocyrtanus-from-mato-grosso-brazil-opiliones-gonyleptidae-with-a-key-to-the-species-of-the-genus
#4
Rafael N Carvalho, Adriano B Kury
Discocyrtanus canjinjim sp. n., belonging to the family Gonyleptidae Sundevall, 1833 is described based on nineteen specimens, eleven adult males and eight adult females, collected in the Vila Bela da Santíssima Trindade, in the State of Mato Grosso, Brazil. This new species represents an endemic component for the harvestmen fauna of Chiquitano Dry Forests terrestrial eco-region, being the most occidental point of distribution of the genus, notably found in the Cerrado and the Atlantic Forest. The new species is characterized by femur IV swollen with the same length of dorsal scutum, trochanter IV with prodorsal distal apophysis as a stout hook not bifurcated, and a unique form of genitalia in the genus...
November 14, 2017: Comptes Rendus Biologies
https://www.readbyqxmd.com/read/29149738/associations-of-urinary-polycyclic-aromatic-hydrocarbon-metabolites-with-fractional-exhaled-nitric-oxide-and-exhaled-carbon-monoxide-a-cross-sectional-study
#5
Yun Zhou, Yuewei Liu, Huizhen Sun, Jixuan Ma, Lili Xiao, Limin Cao, Wei Li, Bin Wang, Jing Yuan, Weihong Chen
Exposure to Polycyclic aromatic hydrocarbons (PAHs) has been associated with inflammatory responses. Fractional exhaled nitric oxide (FeNO) and exhaled carbon monoxide (eCO) are both important inflammatory mediators especially in airways. However, few studies have investigated associations of PAH exposures with FeNO or eCO. Therefore, we aimed to quantify the associations of urinary PAH metabolites with FeNO and eCO levels, and investigate their potential effect modifiers by linear mixed models among 4133 participants from the Wuhan-Zhuhai cohort in China...
November 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29146498/synthesis-and-characterization-of-silver-nanoparticles-using-gelidium-amansii-and-its-antimicrobial-property-against-various-pathogenic-bacteria
#6
Arivalagan Pugazhendhi, Desika Prabakar, Jaya Mary Jacob, Indira Karuppusamy, Rijuta Ganesh Saratale
Microfouling is evolving at a fast rate causing augmented mortality rates and damage worldwide. Until now, several remedial measures have been exploited to overcome microfouling, amongst them nanoparticles play a superior role. Currently, green synthesized nanoparticles have been centered owing to its eco-friendly, cost effectively and non-toxic nature which has also increased its industrial applications (biomedicine, food and textile). In the present research Silver Nanoparticles (Ag NPs) synthesized using marine red algae Gelidium amansii...
November 13, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29145100/environmental-assessment-of-microwaves-and-the-effect-of-european-energy-efficiency-and-waste-management-legislation
#7
Alejandro Gallego-Schmid, Joan Manuel F Mendoza, Adisa Azapagic
More than 130 million microwaves are affected by European Union (EU) legislation which is aimed at reducing the consumption of electricity in the standby mode ('Standby Regulation') and at more sustainable management of end-of-life electrical and electronic waste ('WEEE Directive'). While legislation focuses on these two life cycle stages, there is little information on the environmental impacts of the entire life cycle of microwaves. To address this gap, this paper presents a comprehensive life cycle assessment of microwaves and assesses the environmental implications of the Standby Regulation and the WEEE Directive at the EU level...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29142241/diverse-marinimicrobia-bacteria-may-mediate-coupled-biogeochemical-cycles-along-eco-thermodynamic-gradients
#8
Alyse K Hawley, Masaru K Nobu, Jody J Wright, W Evan Durno, Connor Morgan-Lang, Brent Sage, Patrick Schwientek, Brandon K Swan, Christian Rinke, Monica Torres-Beltrán, Keith Mewis, Wen-Tso Liu, Ramunas Stepanauskas, Tanja Woyke, Steven J Hallam
Microbial communities drive biogeochemical cycles through networks of metabolite exchange that are structured along energetic gradients. As energy yields become limiting, these networks favor co-metabolic interactions to maximize energy disequilibria. Here we apply single-cell genomics, metagenomics, and metatranscriptomics to study bacterial populations of the abundant "microbial dark matter" phylum Marinimicrobia along defined energy gradients. We show that evolutionary diversification of major Marinimicrobia clades appears to be closely related to energy yields, with increased co-metabolic interactions in more deeply branching clades...
November 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29141577/extracellular-synthesis-of-selenium-nanoparticles-from-an-actinomycetes-streptomyces-griseoruber-and-evaluation-of-its-cytotoxicity-on-ht-29-cell-line
#9
V R Ranjitha, Ravishankar Rai Vittal
In the present study, the extracellular synthesis of Selenium nanoparticles (SeNPs) was carried out by using culture supernatant of Streptomyces griseoruber, an Actinomycetes member isolated from the soil. Bioreduction of SeNPs was confirmed by UV-Visible spectrophotometer that showed the peak at 575 nm. XRD pattern confirmed the non-crystalline or amorphous nature of the synthesised SeNPs. FTIR spectra revealed the possible functional group that is responsible for mediating the SeNPs formation. Size and distribution of the biosynthesised SeNPs were analysed by HR-TEM that showed the formation of particle size in the range of 100-250nm...
November 13, 2017: Pharmaceutical Nanotechnology
https://www.readbyqxmd.com/read/29141144/engineering-interface-with-one-dimensional-co3o4-nanostructure-in-catalytic-membrane-electrode-towards-an-advanced-electrocatalyst-for-alcohol-oxidation
#10
Zhen Yin, Yumei Zheng, Hong Wang, Jianxin Li, Qingjun Zhu, Ye Wang, Na Ma, Gang Hu, Benqiao He, Axel Knop-Gericke, Robert Schloegl, Ding Ma
Electrochemical oxidation has attracted vast interests as a promising alternative to traditional chemical processes in fine chemical synthesis owing to its fast and sustainable features. An electrocatalytic membrane reactor (ECMR) with a three-dimensional (3D) electrode has been successfully designed for the selective oxidation of alcohols with high current efficiency to the corresponding acids or ketones. The anode electrode was fabricated by the in-situ loading of one-dimensional (1D) Co3O4 nanowires (NWs) on the conductive porous Ti membrane (Co3O4 NWs/Ti) via the combination of a facile hydrothermal synthesis and subsequent thermal treatment...
November 15, 2017: ACS Nano
https://www.readbyqxmd.com/read/29139077/spatiotemporal-patterns-and-source-attribution-of-nitrogen-pollution-in-a-typical-headwater-agricultural-watershed-in-southeastern-china
#11
Wenjun Chen, Bin He, Daniel Nover, Weili Duan, Chuan Luo, Kaiyan Zhao, Wen Chen
Excessive nitrogen (N) discharge from agriculture causes widespread problems in aquatic ecosystems. Knowledge of spatiotemporal patterns and source attribution of N pollution is critical for nutrient management programs but is poorly studied in headwaters with various small water bodies and mini-point pollution sources. Taking a typical small watershed in the low mountains of Southeastern China as an example, N pollution and source attribution were studied for a multipond system around a village using the Hydrological Simulation Program-Fortran (HSPF) model...
November 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29138088/comparing-multilayer-brain-networks-between-groups-introducing-graph-metrics-and-recommendations
#12
Kanad Mandke, Jil Meier, Matthew J Brookes, Reuben D O'Dea, Piet Van Mieghem, Cornelis J Stam, Arjan Hillebrand, Prejaas Tewarie
There is an increasing awareness of the advantages of multi-modal neuroimaging. Networks obtained from different modalities are usually treated in isolation, which is however contradictory to accumulating evidence that these networks show non-trivial interdependencies. Even networks obtained from a single modality, such as frequency-band specific functional networks measured from magnetoencephalography (MEG) are often treated independently. Here, we discuss how a multilayer network framework allows for integration of multiple networks into a single network description and how graph metrics can be applied to quantify multilayer network organisation for group comparison...
November 11, 2017: NeuroImage
https://www.readbyqxmd.com/read/29137788/ultrasonic-assisted-manufacturing-of-new-hydrogel-nanocomposite-biosorbent-containing-calcium-carbonate-nanoparticles-and-tragacanth-gum-for-removal-of-heavy-metal
#13
Shadpour Mallakpour, Amir Abdolmaleki, Farbod Tabesh
This article reports the first incorporation of calcium carbonate nanoparticles (CC NPs) into tragacanth gum (TG) to prepare a new hydrogel nanocomposite (HNC) system using a green, safe, and eco-friendly method, ultrasound irradiation as an efficient biosorbent of heavy metal ions from wastewater. Morphological studies revealed that the surface of obtained HNCs is rough, homogeneous, and porous-like due to the embedding of CC NPs as well as sonication in comparison to the neat TG which has a smooth surface...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29137784/surface-modified-sio2-nanoparticles-by-thiamine-and-ultrasonication-synthesis-of-pcl-sio2-vb1-ncs-morphology-thermal-mechanical-and-bioactivity-investigations
#14
Shadpour Mallakpour, Zahra Khani
The influence of silica (SiO2) nanoparticles (NPs) on the properties of polycaprolactone (PCL) was investigated. Due to the intense tendency of SiO2 NPs to aggregation and their high surface energy, the surface of SiO2 NPs was treatment via Vitamin B1 (VB1) as a biosafe coupling agent. Novel PCL/SiO2-VB1 nanocomposites (NC) films by variety of percentage of SiO2-VB1 NPs were prepared under ultrasonic irradiation as an eco-friendly and fast procedure following by casting method. Fourier transform infrared spectroscopy and energy dispersive X-ray analysis exposed the presence of SiO2 NPs into the polymer matrix...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29137732/ultrasound-assisted-biosynthesis-of-cuo-nps-using-brown-alga-cystoseira-trinodis-characterization-photocatalytic-aop-dpph-scavenging-and-antibacterial-investigations
#15
Haidong Gu, Xiao Chen, Feng Chen, Xing Zhou, Zohreh Parsaee
This contribution reports the biosynthesis of CuO NPs via ultrasound method using the Cystoseira trinodis extracts as an eco friendly and time saving process. The characterization of cupric oxide NPs was performed using XRD, FE-SEM, EDX, TEM, AFM, photoluminescence, UV-Vis, Raman and FT-IR spectroscopy investigations. SEM images show the spherical structure with the average crystallite size 6nm to 7.8nm of CuO. XRD analysis approved the formation of pure monoclinic crystallite structures of CuO NPs. These observations were confirmed by TEM analysis...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29135816/dopaminergic-genetic-variants-and-voluntary-externally-paced-exercise-behavior
#16
Denise J van der Mee, Iryna O Fedko, Jouke-Jan Hottenga, Erik A Ehli, Matthijs D van der Zee, Lannie Ligthart, Toos C E M van Beijsterveldt, Gareth E Davies, Meike Bartels, Joseph G Landers, Eco J C de Geus
PURPOSE: Most candidate gene studies on the neurobiology of voluntary exercise behavior have focused on the dopaminergic signaling pathway and its role in the mesolimbic reward system. We hypothesized that dopaminergic candidate genes may influence exercise behavior through additional effects on executive functioning and that these effects are only detected when the types of exercise activity are taken into account. METHODS: Data on voluntary exercise behavior and at least one SNP/VNTR were available for 12,929 participants of the Netherlands Twin Registry...
November 9, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29132776/predicting-predator-recognition-in-a-changing-world
#17
REVIEW
Alexandra J R Carthey, Daniel T Blumstein
Through natural as well as anthropogenic processes, prey can lose historically important predators and gain novel ones. Both predator gain and loss frequently have deleterious consequences. While numerous hypotheses explain the response of individuals to novel and familiar predators, we lack a unifying conceptual model that predicts the fate of prey following the introduction of a novel or a familiar (reintroduced) predator. Using the concept of eco-evolutionary experience, we create a new framework that allows us to predict whether prey will recognize and be able to discriminate predator cues from non-predator cues and, moreover, the likely persistence outcomes for 11 different predator-prey interaction scenarios...
November 10, 2017: Trends in Ecology & Evolution
https://www.readbyqxmd.com/read/29132421/durability-monitoring-of-long-lasting-insecticidal-mosquito-nets-llins-in-madagascar-physical-integrity-and-insecticidal-activity
#18
Sanjiarizaha Randriamaherijaona, Jacky Raharinjatovo, Sébastien Boyer
BACKGROUND: Long-lasting insecticidal mosquito nets (LLINs) are highly effective for malaria prevention. However, it is also clear that durability monitoring is essential to predict when, post-distribution, a net population, no longer meets minimum WHO standards and needs to be replaced. Following a national distribution campaign in 2013, we tracked two durability indicators, physical integrity and bio-efficacy at six and 12 months post-distribution. While the loss of net integrity during this period was in line with expectations for a one-year net life, bio-efficacy results suggested that nets were losing insecticidal effect faster than expected...
November 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29132003/treatment-impacts-on-temporal-microbial-community-dynamics-during-phytostabilization-of-acid-generating-mine-tailings-in-semiarid-regions
#19
Alexis Valentín-Vargas, Julia W Neilson, Robert A Root, Jon Chorover, Raina M Maier
Direct revegetation, or phytostabilization, is a containment strategy for contaminant metals associated with mine tailings in semiarid regions. The weathering of sulfide ore-derived tailings frequently drives acidification that inhibits plant establishment resulting in materials prone to wind and water dispersal. The specific objective of this study was to associate pyritic mine waste acidification, characterized through pore-water chemistry analysis, with dynamic changes in microbial community diversity and phylogenetic composition, and to evaluate the influence of different treatment strategies on the control of acidification dynamics...
November 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29131937/an-innovative-in-situ-ball-mill-for-x-ray-diffraction
#20
Voraksmy Ban, Yolanda Sadikin, Michael Lange, Nikolay A Tumanov, Yaroslav Filinchuk, Radovan Černý, Nicola P M Casati
The renewed interest of mechanochemistry as an eco-friendly synthetic route has inspired original methodologies to probe reactions, with the aim to rationalize unknown mechanisms. Recently, Friščić et al. [Nat Chem 2013, 5, 66-73] monitored the progress of milling reactions by synchrotron X-ray Powder Diffraction (XRPD). For the first time, it was possible to acquire directly information during a mechanochemical process. This new methodology is still in its early stages and its development will definitively transform the fundamental understanding of mechanochemistry...
November 13, 2017: Analytical Chemistry
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