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https://www.readbyqxmd.com/read/29786423/electrochemical-determination-of-tnt-dnt-rdx-and-hmx-with-gold-nanoparticles-poly-carbazole-aniline-film-modified-glassy-carbon-sensor-electrodes-imprinted-for-molecular-recognition-of-nitroaromatics-and-nitramines
#1
Şener Sağlam, Ayşem Üzer, Erol Erçağ, Reşat Apak
Since nitroaromatic and nitramine type energetic materials, mostly arising from military activities, are persistent pollutants in soil and groundwater, on-site sensing of these hazardous chemicals has gained importance. A novel electrochemical sensor was designed for detecting nitroaromatic and nitramine type energetic materials, relying on gold nanoparticles (Aunano ) -modified glassy carbon (GC) electrode coated with nitro-energetic memory poly(carbazole-aniline) copolymer (Cz- co-ANI) film (e.g., TNT memory-GC/P(Cz- co-ANI)-Aunano modified electrode)...
May 22, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29786100/a-multifunctional-eu-cp-as-a-recyclable-luminescent-probe-for-the-highly-sensitive-detection-of-fe-3-fe-2-cr-2-o-7-2-and-nitroaromatic-explosives
#2
Yang Yang, Fangzhou Qiu, Cong Xu, Yan Feng, Guolin Zhang, Weisheng Liu
A novel 2D lanthanide coordination polymer {Eu-CP (1)} based on a 3-bis(3-carboxyphenyl)imidazolium (L) ligand was successfully assembled through a solvothermal method. Luminescence tests indicate that 1 has excellent selectivity and sensitivity to detect Fe3+/Fe2+, Cr2O72-, and a series of nitroaromatic explosives. Interestingly, 1 can effectively distinguish CrVI anions (CrO42-/Cr2O72-), which is difficult for most of the reported CPs. Furthermore, in the detection process, 1 can be simply and quickly regenerated and reused at least five times...
May 22, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29784780/early-fossil-record-of-euarthropoda-and-the-cambrian-explosion
#3
Allison C Daley, Jonathan B Antcliffe, Harriet B Drage, Stephen Pates
Euarthropoda is one of the best-preserved fossil animal groups and has been the most diverse animal phylum for over 500 million years. Fossil Konservat-Lagerstätten, such as Burgess Shale-type deposits (BSTs), show the evolution of the euarthropod stem lineage during the Cambrian from 518 million years ago (Ma). The stem lineage includes nonbiomineralized groups, such as Radiodonta (e.g., Anomalocaris ) that provide insight into the step-by-step construction of euarthropod morphology, including the exoskeleton, biramous limbs, segmentation, and cephalic structures...
May 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29782620/genomic-big-data-hitting-the-storage-bottleneck
#4
Louis Papageorgiou, Picasi Eleni, Sofia Raftopoulou, Meropi Mantaiou, Vasileios Megalooikonomou, Dimitrios Vlachakis
During the last decades, there is a vast data explosion in bioinformatics. Big data centres are trying to face this data crisis, reaching high storage capacity levels. Although several scientific giants examine how to handle the enormous pile of information in their cupboards, the problem remains unsolved. On a daily basis, there is a massive quantity of permanent loss of extensive information due to infrastructure and storage space problems. The motivation for sequencing has fallen behind. Sometimes, the time that is spent to solve storage space problems is longer than the one dedicated to collect and analyse data...
2018: EMBnet.journal
https://www.readbyqxmd.com/read/29780850/canada-wide-epidemic-of-emm74-group-a-streptococcus-invasive-disease
#5
Sarah Teatero, Allison McGeer, Gregory J Tyrrell, Linda Hoang, Hanan Smadi, Marc-Christian Domingo, Paul N Levett, Michael Finkelstein, Ken Dewar, Agron Plevneshi, Taryn B T Athey, Jonathan B Gubbay, Michael R Mulvey, Irene Martin, Walter Demczuk, Nahuel Fittipaldi
Background: The number of invasive group A Streptococcus (iGAS) infections due to hitherto extremely rare type emm74 strains has increased in several Canadian provinces since late 2015. We hypothesized that the cases recorded in the different provinces are linked and caused by strains of an emm74 clone that recently emerged and expanded explosively. Methods: We analyzed both active and passive surveillance data for iGAS infections and used whole-genome sequencing to investigate the phylogenetic relationships of the emm74 strains responsible for these invasive infections country-wide...
May 2018: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/29780495/examining-the-chemical-and-structural-properties-that-influence-the-sensitivity-of-energetic-nitrate-esters
#6
Virginia W Manner, Marc J Cawkwell, Edward M Kober, Thomas W Myers, Geoff W Brown, Hongzhao Tian, Christopher J Snyder, Romain Perriot, Daniel N Preston
The sensitivity of explosives is controlled by factors that span from intrinsic chemical reactivity and chemical intramolecular effects to mesoscale structure and defects, and has been a topic of extensive study for over 50 years. Due to these complex competing chemical and physical elements, a unifying relationship between molecular framework, crystal structure, and sensitivity has yet to be developed. In order to move towards this goal, ideally experimental studies should be performed on systems with small, systematic structural modifications, with modeling utilized to interpret experimental results...
April 21, 2018: Chemical Science
https://www.readbyqxmd.com/read/29779985/systems-biology-based-investigation-of-host-plasmodium-interactions
#7
REVIEW
Maren L Smith, Mark P Styczynski
Malaria is a serious, complex disease caused by parasites of the genus Plasmodium. Plasmodium parasites affect multiple tissues as they evade immune responses, replicate, sexually reproduce, and transmit between vertebrate and invertebrate hosts. The explosion of omics technologies has enabled large-scale collection of Plasmodium infection data, revealing systems-scale patterns, mechanisms of pathogenesis, and the ways that host and pathogen affect each other. Here, we provide an overview of recent efforts using systems biology approaches to study host-Plasmodium interactions and the biological themes that have emerged from these efforts...
May 18, 2018: Trends in Parasitology
https://www.readbyqxmd.com/read/29779454/vaccinia-based-vaccines-to-biothreat-and-emerging-viruses
#8
Les P Nagata, Chad R Irwin, Wei-Gang Hu, David H Evans
The past few years have seen a rash of emerging viral diseases, including the Ebola crisis in West Africa, the pandemic spread of chikungunya, and the recent explosion of Zika in South America. Vaccination is the most reliable and cost-effective method of control of infectious diseases, however, there is often a long delay in production and approval in getting new vaccines to market. Vaccinia was the first vaccine developed for the successful eradication of smallpox and has properties that make it attractive as a universal vaccine vector...
May 21, 2018: Biotechnology & Genetic Engineering Reviews
https://www.readbyqxmd.com/read/29777475/effects-of-resistance-training-detraining-and-retraining-on-strength-and-functional-capacity-in-elderly
#9
Raphael Luiz Sakugawa, Bruno Monteiro Moura, Lucas Bet da Rosa Orssatto, Ewertton de Souza Bezerra, Eduardo Lusa Cadore, Fernando Diefenthaeler
BACKGROUND: The interruption of training (detraining) results in loss of the gains acquired. Partial retention could occur after detraining, and variation in training stimuli may optimize retraining adaptations. AIM: To evaluate the effect of a resistance-retraining program on strength and functional capacity performance after a detraining period. METHODS: Ten elderly men and women (63-68 years) completed 12 weeks of training, 16 weeks of detraining, and 8 weeks of retraining...
May 17, 2018: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/29776136/individual-heterogeneity-generating-explosive-system-network-dynamics
#10
Pedro D Manrique, Neil F Johnson
Individual heterogeneity is a key characteristic of many real-world systems, from organisms to humans. However, its role in determining the system's collective dynamics is not well understood. Here we study how individual heterogeneity impacts the system network dynamics by comparing linking mechanisms that favor similar or dissimilar individuals. We find that this heterogeneity-based evolution drives an unconventional form of explosive network behavior, and it dictates how a polarized population moves toward consensus...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776028/modeling-thermal-inkjet-and-cell-printing-process-using-modified-pseudopotential-and-thermal-lattice-boltzmann-methods
#11
Salman Sohrabi, Yaling Liu
Pseudopotential lattice Boltzmann methods (LBMs) can simulate a phase transition in high-density ratio multiphase flow systems. If coupled with thermal LBMs through equation of state, they can be used to study instantaneous phase transition phenomena with a high-temperature gradient where only one set of formulations in an LBM system can handle liquid, vapor, phase transition, and heat transport. However, at lower temperatures an unrealistic spurious current at the interface introduces instability and limits its application in real flow system...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29775709/use-of-green-chemistry-methods-in-the-extraction-of-dietary-fibers-from-cactus-rackets-opuntia-ficus-indica-structural-and-microstructural-studies
#12
Marwa Cheikh Rouhou, Souhir Abdelmoumen, Sabu Thomas, Hamadi Attia, Dorra Ghorbel
This work aims to compare the development of three green chemistry methods in the extraction of cactus (Opuntia ficus indica) dietary fibers. The influence of extraction conditions (solvent nature: water, lemon juice and ethanol; extraction process: maceration and steam explosion; extraction time: 30 min, 1 h, 3 h, 5 h) on the chemical and structural composition was studied. Fourier Transform Infrared (FTIR) spectroscopy proved that all treatments do not affect the cellulose structure and could induce the reduction of hemicelluloses and lignin content...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29772020/so-many-genes-so-little-time-a-practical-approach-to-divergence-time-estimation-in-the-genomic-era
#13
Stephen A Smith, Joseph W Brown, Joseph F Walker
Phylogenomic datasets have been successfully used to address questions involving evolutionary relationships, patterns of genome structure, signatures of selection, and gene and genome duplications. However, despite the recent explosion in genomic and transcriptomic data, the utility of these data sources for efficient divergence-time inference remains unexamined. Phylogenomic datasets pose two distinct problems for divergence-time estimation: (i) the volume of data makes inference of the entire dataset intractable, and (ii) the extent of underlying topological and rate heterogeneity across genes makes model mis-specification a real concern...
2018: PloS One
https://www.readbyqxmd.com/read/29770330/the-prediction-of-drug-disease-correlation-based-on-gene-expression-data
#14
Hui Cui, Menghuan Zhang, Qingmin Yang, Xiangyi Li, Michael Liebman, Ying Yu, Lu Xie
The explosive growth of high-throughput experimental methods and resulting data yields both opportunity and challenge for selecting the correct drug to treat both a specific patient and their individual disease. Ideally, it would be useful and efficient if computational approaches could be applied to help achieve optimal drug-patient-disease matching but current efforts have met with limited success. Current approaches have primarily utilized the measureable effect of a specific drug on target tissue or cell lines to identify the potential biological effect of such treatment...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29769371/how-are-we-currently-training-and-maintaining-clinical-readiness-of-us-and-uk-military-surgeons-responsible-for-managing-head-face-and-neck-wounds-on-deployment
#15
John Breeze, J G Combes, J DuBose, D B Powers
INTRODUCTION: The conflicts in Iraq and Afghanistan provided military surgeons from the USA and the UK with extensive experience into the management of injuries to the head, face and neck (HFN) from high energy bullets and explosive weaponry. The challenge is now to maintain the expertise in managing such injuries for future military deployments. METHODS: The manner in which each country approaches four parameters required for a surgeon to competently treat HFN wounds in deployed military environments was compared...
May 16, 2018: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/29767535/express-classical-least-squares-assisted-mir-laser-spectroscopy-detection-of-high-explosives-on-fabrics
#16
Leonardo C Pacheco-Londoño, Joaquin A Aparicio-Bolaño, Nataly J Galán-Freyle, Andrés D Román-Ospino, José L Ruiz-Caballero, Samuel P Hernandez
No abstract text is available yet for this article.
January 1, 2018: Applied Spectroscopy
https://www.readbyqxmd.com/read/29767278/the-hypothalamus-and-neuropsychiatric-disorders-psychiatry-meets-microscopy
#17
REVIEW
Hans-Gert Bernstein, Henrik Dobrowolny, Bernhard Bogerts, Gerburg Keilhoff, Johann Steiner
The past decades have witnessed an explosion of knowledge on brain structural abnormalities in schizophrenia and depression. Focusing on the hypothalamus, we try to show how postmortem brain microscopy has contributed to our understanding of mental disease-related pathologic alterations of this brain region. Gross anatomical abnormalities (volume changes of the third ventricle, the hypothalamus, and its nuclei) and alterations at the cellular level (loss of neurons, increased or decreased expression of hypothalamic peptides such as oxytocin, vasopressin, corticotropin-releasing hormone, and other regulatory factors as well as of enzymes involved in neurotransmitter and neuropeptide metabolism) have been reported in schizophrenia and/or depression...
May 16, 2018: Cell and Tissue Research
https://www.readbyqxmd.com/read/29765646/towards-the-fluorogenic-detection-of-peroxide-explosives-through-host-guest-chemistry
#18
Estefanía Almenar, Ana M Costero, Pablo Gaviña, Salvador Gil, Margarita Parra
Two dansyl-modified β-cyclodextrin derivatives ( 1 and 2 ) have been synthesized as host-guest sensory systems for the direct fluorescent detection of the peroxide explosives diacetone diperoxide (DADP) and triacetone triperoxide (TATP) in aqueous media. The sensing is based on the displacement of the dansyl moiety from the cavity of the cyclodextrin by the peroxide guest resulting in a decrease of the intensity of the fluorescence of the dye. Both systems showed similar fluorescent responses and were more sensitive towards TATP than DADP...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29765354/pituitary-directed-therapies-for-cushing-s-disease
#19
REVIEW
Fabienne Langlois, Jennifer Chu, Maria Fleseriu
Cushing's disease (CD) is caused by a pituitary corticotroph neuroendocrine tumor inducing uncontrolled hypercortisolism. Transsphenoidal surgery is the first-line treatment in most cases. Nonetheless, some patients will not achieve cure even in expert hands, others may not be surgical candidates and a significant percentage will experience recurrence. Many patients will thus require medical therapy to achieve disease control. Pharmacologic options to treat CD have increased in recent years, with an explosion in knowledge related to pathophysiology at the molecular level...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29765030/early-cambrian-origin-of-the-shelf-sediment-mixed-layer
#20
Romain C Gougeon, M Gabriela Mángano, Luis A Buatois, Guy M Narbonne, Brittany A Laing
The mixed layer of modern oceans is a zone of fully homogenized sediment resulting from bioturbation. The mixed layer is host to complex biogeochemical cycles that directly impact ecosystem functioning, affecting ocean productivity and marine biodiversity. The timing of origin of the mixed layer has been controversial, with estimates ranging from Cambrian to Silurian, hindering our understanding of biogeochemical cycling and ecosystem dynamics in deep time. Here we report evidence from the Global Stratotype Section and Point (GSSP) of the basal Cambrian in the Burin Peninsula of Newfoundland, Canada, showing that a well-developed mixed layer of similar structure to that of modern marine sediments was established in shallow marine settings by the early Cambrian (approximately 529 million years ago)...
May 15, 2018: Nature Communications
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