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https://www.readbyqxmd.com/read/28941360/the-study-on-six-green-insensitive-high-energetic-coordination-polymers-based-on-alkali-alkali-earth-metals-and-4-5-bis-tetrazol-5-yl-2h-1-2-3-triazole
#1
Dong Chen, Dong Jing, Qi Zhang, Xianggui Xue, Shaohua Gou, Hongzhen Li, Fude Nie
Constructing insensitive high-performance ECPs with alkali/alkali-earth metal ions and nitrogen-rich organic backbone has been proved a feasible strategy in this work. Six diverse dimensional novel ECPs (Compounds 1-6) were successfully synthesized from Na(I), Cs(I), Ca(II), Sr(II), Ba(II) ions and a nitrogen-rich triheterocyclic 4,5-Bis(tetrazol-5-yl)-2H-1,2,3-triazole (H3BTT). All compounds show outstanding stability and low sensitivity, the thermal stability of these ECPs are significantly improved as the structural reinforcement increased from 1D to 3D, in which the decomposition temperature of 3D Ba(II) based compound 6 is as high as 397 oC...
September 23, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28937829/nonlinearity-coherence-and-complexity-biophysical-aspects-related-to-health-and-disease
#2
Alberto Foletti, Larissa Brizhik
Biological organisms are complex open dissipative systems whose dynamical stability is sustained due to the exchange of matter, energy and information. Dynamical stability occurs through a number of mechanisms that sustain efficient adaptive dynamics. Such properties of living matter can be the consequence of a self-consistent state of matter and electromagnetic field (EMF). Based on the soliton model of charge transport in redox processes, we describe a possible mechanism of the origin of endogenous EMF and coherence...
September 22, 2017: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/28924261/a-chip-integrated-coherent-photonic-phononic-memory
#3
Moritz Merklein, Birgit Stiller, Khu Vu, Stephen J Madden, Benjamin J Eggleton
Controlling and manipulating quanta of coherent acoustic vibrations-phonons-in integrated circuits has recently drawn a lot of attention, since phonons can function as unique links between radiofrequency and optical signals, allow access to quantum regimes and offer advanced signal processing capabilities. Recent approaches based on optomechanical resonators have achieved impressive quality factors allowing for storage of optical signals. However, so far these techniques have been limited in bandwidth and are incompatible with multi-wavelength operation...
September 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28917180/learning-from-the-operation-pathology-and-maintenance-of-a-bioretention-system-to-optimize-urban-drainage-practices
#4
Marina Batalini de Macedo, Altair Rosa, César Ambrogi Ferreira do Lago, Eduardo Mario Mendiondo, Vladimir Caramori Borges de Souza
LID practices for runoff control are increasingly being used as an integrated solution in urban drainage, helping to achieve hydrological balance close to the pre-urbanized period and decrease the diffuse pollution transported to urban rivers. Regarding bioretention, there is already broad knowledge about the detention of peak flows and their treatment capacity for many pollutants. However, there are still few field studies in microdrainage scale, which analyze the actual operation of these devices and raise common problems found, especially in subtropical climate...
September 13, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28888187/effect-of-tank-diameter-on-thermal-behavior-of-gasoline-and-diesel-storage-tanks-fires
#5
Ricardo Machado Leite, Felipe Roman Centeno
Studies on fire behavior are extremely important as they contribute in a firefighting situation or even to avoid such hazard. Experimental studies of fire in real scale are unfeasible, implying that reduced-scale experiments must be performed, and results extrapolated to the range of interest. This research aims to experimentally study the fire behavior in tanks of 0.04m, 0.20m, 0.40m, 0.80m and 4.28m diameter, burning regular gasoline or diesel oil S-500. The following parameters were here obtained: burning rates, burning velocities, heat release rates, flame heights, and temperature distributions adjacent to the tank...
August 24, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28861030/coding-of-velocity-storage-in-the-vestibular-nuclei
#6
Sergei B Yakushin, Theodore Raphan, Bernard Cohen
Semicircular canal afferents sense angular acceleration and output angular velocity with a short time constant of ≈4.5 s. This output is prolonged by a central integrative network, velocity storage that lengthens the time constants of eye velocity. This mechanism utilizes canal, otolith, and visual (optokinetic) information to align the axis of eye velocity toward the spatial vertical when head orientation is off-vertical axis. Previous studies indicated that vestibular-only (VO) and vestibular-pause-saccade (VPS) neurons located in the medial and superior vestibular nucleus could code all aspects of velocity storage...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28846382/rates-of-co2-mineralization-in-geological-carbon-storage
#7
Shuo Zhang, Donald J DePaolo
Geologic carbon storage (GCS) involves capture and purification of CO2 at industrial emission sources, compression into a supercritical state, and subsequent injection into geologic formations. This process reverses the flow of carbon to the atmosphere with the intention of returning the carbon to long-term geologic storage. Models suggest that most of the injected CO2 will be "trapped" in the subsurface by physical means, but the most risk-free and permanent form of carbon storage is as carbonate minerals (Ca,Mg,Fe)CO3...
August 28, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28837611/rooibos-aspalathus-linearis-extract-enhances-boar-sperm-velocity-up-to-96-hours-of-semen-storage
#8
José Luis Ros-Santaella, Eliana Pintus
Rooibos (Aspalathus linearis) is a native shrub from South African fynbos and has become very popular in the last decades for its antioxidant and medicinal attributes. Several studies have shown its beneficial properties in numerous cell lines, but to date, the in vitro effects of rooibos extract on sperm cells are still unknown. In this study, boar semen was supplemented with four concentrations both of fermented and unfermented rooibos extracts during 96 h of liquid storage at 17°C. The effects of rooibos extracts on sperm velocity, membrane integrity, and acrosomal status were evaluated at 2 h, 48 h, and 96 h of semen storage...
2017: PloS One
https://www.readbyqxmd.com/read/28836427/embedded-triboelectric-active-sensors-for-real-time-pneumatic-monitoring
#9
Xian Peng Fu, Tian Zhao Bu, Feng Ben Xi, Ting Hai Cheng, Chi Zhang, Zhong Lin Wang
Pneumatic monitoring sensors have great demands for power supply in cylinder systems. Here, we present an embedded sliding triboelectric nanogenerator (TENG) in air cylinder as active sensors for position and velocity monitoring. The embedded TENG is composed of a circular poly(tetrafluoroethylene) polymer and a triangular copper electrode. The working mechanism as triboelectric active sensors and electric output performance are systematically investigated. By integrating into the pneumatic system, the embedded triboelectric active sensors have been used for real-time air pressure/flow monitoring and energy storage...
September 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28827457/take-off-mechanisms-in-parasitoid-wasps
#10
M Burrows, M Dorosenko
High speed video analyses of the natural behaviour of parasitoid wasps revealed three strategies used to launch themselves into the air. Which strategy is the most energy efficient? In Pteromalus puparum, 92% of take-offs by were propelled entirely by movements of the middle and hind legs which were depressed at their coxo-trochanteral and extended at their femoro-tibial joints. The front legs left the ground first, followed by the hind legs, so that the middle legs provided the final propulsion. Second, in other species of a similar mass, Cotesia glomerata and Leptopilina boulardi, all take-offs were propelled by a mean of 2...
August 21, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28825820/fate-of-a-stressed-therapeutic-antibody-tracked-by-fluorescence-correlation-spectroscopy-folded-monomers-survive-aggregation
#11
Hiroshi Imamura, Akira Sasaki, Shinya Honda
Antibodies are therapeutic proteins that are becoming indispensable for the treatment of serious diseases. Their efficacies depend on their folded structures, the loss of which, through unfolding or aggregation, should be closely monitored during their manufacture, storage, and dosing for safe usage. In downstream processes, exposure of the crude antibody solution to acid, followed by neutralization, is an established standard protocol for antibody purification and inactivation of viruses in antibody preparations...
August 21, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28772646/high-temperature-hot-air-silane-coupling-modification-of-wood-fiber-and-its-effect-on-properties-of-wood-fiber-hdpe-composites
#12
Feng Chen, Guangping Han, Qingde Li, Xun Gao, Wanli Cheng
The surfaces of poplar wood fibers were modified using high-temperature hot air (HTHA) treatment and silane coupling agent. The single factor test was then used to investigate the performances (e.g., the change of functional groups, polarity, cellulose crystallinity, and thermal stability) of modified poplar wood fibers (mPWF) through Fourier transform infrared spectrometry, X-ray diffraction and thermo-gravimetric analysis for the subsequent preparation of wood-plastic composites (WPCs). The effect of HTHA treatment conditions-such as temperature, inlet air velocity, and feed rate-on the performances of WPCs was also investigated by scanning electron microscopy and dynamic mechanical analysis...
March 13, 2017: Materials
https://www.readbyqxmd.com/read/28741693/antioxidants-protect-proteins-anchorage-to-the-bilayer-by-improving-plasma-membrane-integrity-of-ram-spermatozoa-during-liquid-preservation-in-a-soya-lecithin-based-diluent
#13
R K Paul, D Kumar, Smk Naqvi
Antioxidants are known to prevent the reactive oxygen species (ROS)-mediated peroxidative damage to the membrane lipids during hypothermic storage of mammalian spermatozoa. We hypothesized here that ROS also affect the lipid-protein interactions, thereby diminishing the membrane's integrity and proteins' anchorage to the bilayer. Antioxidants prevent these damages by scavenging the ROS. Ejaculates from Patanwadi rams were pooled after subjective evaluation and centrifuged using Percoll(®) . Sperm pellet was resuspended in soya lecithin-Tris-fructose diluent (400 × 10(6)  cells/ml) containing either antioxidants (100 IU/ml catalase + 10 mM reduced glutathione) or no antioxidant...
July 25, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28740303/kinetic-modeling-to-study-the-quality-of-tambaqui-colossoma-macropomum-sous-vide-during-storage-at-different-temperatures
#14
Fabiane C P Ramos, Suezilde C A Ribeiro, Maria R S Peixoto Joele, Consuelo L Sousa, Lúcia F H Lourenço
This study aimed to assess the changes in quality of tambaqui sous vide during refrigerated storage using degradation kinetics. Tambaqui sous vide was prepared and stored at three temperatures (1, 4, 10 °C). The microorganism counts and the physicochemical analyses were analyzed every three days. The results obtained were fitted to the Labuza models and by Arrhenius equation. The results of the microbiological and physicochemical analyses obtained better fits to the zero-order model. The Arrhenius equation better fit to the velocity constants of the zero-order model, which showed that the changes in the values of attributes are related to temperature...
July 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720975/active-starch-biopolymeric-packaging-film-for-sausages-embedded-with-essential-oil-of-syzygium-aromaticum
#15
Mariane L Ugalde, Aline M de Cezaro, Felipe Vedovatto, Natalia Paroul, Juliana Steffens, Eunice Valduga, Geciane T Backes, Elton Franceschi, Rogério L Cansian
Starch polymer matrices were developed with the incorporation of 1% clove essential oil (EO) (Syzygium aromaticum) aiming for use as active packaging for sausages. At the concentration of 1% EO in the polymer matrix, it showed exponential behavior with respect to oil release over 30 days, with faster release in the beginning and a tendency towards a reduction in release velocity over time. The presence of OE in the biofilm led to significant differences versus the control in terms of aroma and flavor parameters...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28704929/radio-frequency-based-nh%C3%A2-selective-catalytic-reduction-catalyst-control-studies-on-temperature-dependency-and-humidity-influences
#16
Markus Dietrich, Gunter Hagen, Willibald Reitmeier, Katharina Burger, Markus Hien, Philippe Grass, David Kubinski, Jaco Visser, Ralf Moos
The upcoming more stringent automotive emission legislations and current developments have promoted new technologies for more precise and reliable catalyst control. For this purpose, radio-frequency-based (RF) catalyst state determination offers the only approach for directly measuring the NH₃ loading on selective catalytic reduction (SCR) catalysts and the state of other catalysts and filter systems. Recently, the ability of this technique to directly control the urea dosing on a current NH₃ storing zeolite catalyst has been demonstrated on an engine dynamometer for the first time and this paper continues that work...
July 12, 2017: Sensors
https://www.readbyqxmd.com/read/28696754/single-photon-interference-due-to-motion-in-an-atomic-collective-excitation
#17
D J Whiting, N Šibalić, J Keaveney, C S Adams, I G Hughes
We experimentally demonstrate the heralded generation of bichromatic single photons from an atomic collective spin excitation (CSE). The photon arrival times display collective quantum beats, a novel interference effect resulting from the relative motion of atoms in the CSE. A combination of velocity-selective excitation with strong laser dressing and the addition of a magnetic field allows for exquisite control of this collective beat phenomenon. The present experiment uses a diamond scheme with near-IR photons that can be extended to include telecommunications wavelengths or modified to allow storage and retrieval in an inverted-Y scheme...
June 23, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28662620/multisubstrate-specific-flavin-containing-monooxygenase-from-chlorella-pyrenoidosa-with-potential-application-for-phenolic-wastewater-remediation-and-biosensor-application
#18
Bhaskar Das, Sanjukta Patra
Microbial degradation of phenolic pollutants in industrial wastewater is dependent on enzymatic pathway comprising a cascade of phenol metabolizing enzymes. Phenol hydroxylase is the first enzyme of the pathway catalyzing the initial attack on phenol in green algae Chlorella pyrenoidosa. The present work reports cost effective production of partially purified microalgal phenol hydroylase by single step purification and characterization of its kinetic properties with the view of application for enzyme based remediation of phenolic wastewater or in phenolic biosensor...
June 30, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28600162/the-effect-of-antioxidants-on-sperm-motility-activation-in-the-booroolong-frog
#19
L M Keogh, P G Byrne, A J Silla
Motile sperm can generate high levels of reactive oxygen species (ROS) post activation, and ROS can quickly accumulate to levels that impair motility and fertilising ability. The addition of antioxidants to sperm suspensions has been suggested as a means of reducing oxidative stress and enhancing sperm motility during and after sperm storage. Despite this, very few studies have attempted to experimentally test the effects of antioxidants on sperm motility activation in animals that use an external mode of fertilisation, espcially in amphibians...
May 20, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28575486/leaf-water-maintains-daytime-transpiration-in-young-cryptomeria-japonica-trees
#20
Sawa Himeno, Wakana Azuma, Koichiro Gyokusen, H Roaki Ishii
Compared with stem water storage, leaf water storage is understudied although it may be important for alleviating water stress by contributing quickly and directly to transpiration demand. To quantify the relative contribution of stem versus leaf water storage to daily water deficit, we measured diurnal changes in transpiration rate, sap-flow velocity and stem radius of 10-year-old Cryptomeria japonica D. Don trees. We assumed that the duration of time lags between transpiration rate and sap-flow velocity reflected stored water in the stem and leaf, and that stem volume change represented water content of elastic tissue...
May 31, 2017: Tree Physiology
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