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https://www.readbyqxmd.com/read/28820922/a-self-assembling-peptide-gel-as-a-vitreous-substitute-a-rabbit-study
#1
Koji Uesugi, Hirokazu Sakaguchi, Yasutaka Hayashida, Ryuhei Hayashi, Koichi Baba, Yuya Suganuma, Hidenori Yokoi, Motokazu Tsujikawa, Kohji Nishida
Purpose: To evaluate a self-assembling peptide gel as a potential vitreous substitute. Methods: PanaceaGel SPG-178, a self-assembling peptide gel, was diluted with distilled water and a balanced salt solution to achieve a final peptide concentration of 0.1%. The gel's refractive index, visible light transmission rate, and rheologic properties were investigated. The gel's biocompatibility was evaluated by examining the cellular viability (live and dead staining) and proliferation rate (alamarBlue assay)...
August 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28820156/viscoelastic-augmented-trabeculectomy-a-newer-concept
#2
Meghna Solanki, Ankur Kumar, Anubhav Upadhyay, Kishor Kumar
PURPOSE: Comparison of conventional trabeculectomy (CT) and viscoelastic-augmented trabeculectomy (VAT) in primary open-angle glaucoma. METHODS: A total of 65 primary open-angle glaucoma cases were taken for each of the two groups, i.e., CT and VAT. Viscoelastic-augmented trabeculectomy constituted lamellar scleral flap, deep scleral flap, penetrating trabeculectomy, peripheral iridectomy, filling of the anterior chamber with viscoelastic (sodium hyaluronate) and balanced salt solution, movement of visco in bleb, and tight flap closure...
August 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28818756/interactions-between-aluminium-iron-and-silicon-in-cucumber-sativus-l-grown-under-acidic-conditions
#3
Nikolai P Bityutskii, Kirill L Yakkonen, Anastasiya I Petrova, Alexey L Shavarda
Aluminium (Al) is one of the major stressors for plants in acidic soils, negatively affecting plant growth and nutrient balances. Significant efforts have been undertaken to understand mechanisms of Al tolerance in plants. However, little is known of the relevance of iron (Fe) and silicon (Si) nutrition under Al stress conditions. The objectives of this study were to determine whether effects induced by Fe and Si are of importance for limitation of Al moving via xylem in plants (Cucumis sativus L.). Cucumber plants (cv...
August 4, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28816684/a-multiobjective-evolutionary-algorithm-based-on-structural-and-attribute-similarities-for-community-detection-in-attributed-networks
#4
Zhangtao Li, Jing Liu, Kai Wu
Most of the existing community detection algorithms are based on vertex connectivity. While in many real networks, each vertex usually has one or more attributes describing its properties which are often homogeneous in a cluster. Such networks can be modeled as attributed graphs, whose attributes sometimes are equally important to topological structure in graph clustering. One important challenge is to detect communities considering both topological structure and vertex properties simultaneously. To this propose, a multiobjective evolutionary algorithm based on structural and attribute similarities (MOEA-SA) is first proposed to solve the attributed graph clustering problems in this paper...
August 16, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28813859/an-assistive-lower-limb-exoskeleton-for-people-with-neurological-gait-disorders
#5
A Ortlieb, M Bouri, R Baud, H Bleuler
Lower limb exoskeletons have already proven the capability to give back mobility to people suffering from spinal cord injury (SCI). Other important populations such as people with multiple sclerosis or muscular dystrophy, frail elderly and stroke victims, suffer from severe gait impairments and could benefit from similar technology. The work presented in the current paper describes a novel design of a 6-actuated degrees of freedom (DOFs) assistive lower limb exoskeleton for people with moderate mobility impairments...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28812230/simulation-of-left-ventricular-dynamics-using-a-low-order-mathematical-model
#6
Michael J Moulton, Brian D Hong, Timothy W Secomb
The eventual goal of this study is to develop methods for estimating dynamic stresses in the left ventricle (LV) that could be used on-line in clinical settings, based on routinely available measurements. Toward this goal, a low-order theoretical model is presented, in which LV shape is represented using a small number of parameters, allowing rapid computational simulations of LV dynamics. The LV is represented as a thick-walled prolate spheroid containing helical muscle fibers with nonlinear passive and time-dependent active contractile properties...
August 15, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/28805221/a-simplified-ab-initio-treatment-of-diradicaloid-structures-produced-from-stretching-and-breaking-chemical-bonds
#7
Suvonil Sinha Ray, Anirban Ghosh, Anindita Shit, Rajat K Chaudhuri, Sudip Chattopadhyay
The present investigation reports on the prospect of using state specific multireference perturbation theory (SSMRPT) with an improved virtual orbital complete active space configuration interaction (IVO-CASCI) reference function (IVO-SSMRPT) to generate potential energy surfaces (PESs) for molecular systems [such as CH4, C2H6, C2H4, H2O2, LiH, and KN] by stretching and breaking of suitable bonds with modest basis sets. We have also revisited the dissociation energy profile of triplet ketene which exhibits a step-like structure in the observed rate...
August 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28802337/eliminating-undesirable-variation-in-neonatal-practice-balancing-standardization-and-customization
#8
REVIEW
Maya Balakrishnan, Aarti Raghavan, Gautham K Suresh
Consistency of care and elimination of unnecessary and harmful variation are underemphasized aspects of health care quality. This article describes the prevalence and patterns of practice variation in health care and neonatology; discusses the potential role of standardization as a solution to eliminating wasteful and harmful practice variation, particularly when it is founded on principles of evidence-based medicine; and proposes ways to balance standardization and customization of practice to ultimately improve the quality of neonatal care...
September 2017: Clinics in Perinatology
https://www.readbyqxmd.com/read/28800518/the-implications-of-drought-and-water-conservation-on-the-reuse-of-municipal-wastewater-recognizing-impacts-and-identifying-mitigation-possibilities
#9
Quynh K Tran, David Jassby, Kurt A Schwabe
As water agencies continue to investigate opportunities to increase resilience and local water supply reliability in the face of drought and rising water scarcity, water conservation strategies and the reuse of treated municipal wastewater are garnering significant attention and adoption. Yet a simple water balance thought experiment illustrates that drought, and the conservation strategies that are often enacted in response to it, both likely limit the role reuse may play in improving local water supply reliability...
July 27, 2017: Water Research
https://www.readbyqxmd.com/read/28800404/does-propofol-sedation-contribute-to-overall-energy-provision-in-mechanically-ventilated-critically-ill-adults-a-retrospective-observational-study
#10
Jennifer Hastings, Emma J Ridley, Oliver Bianchet, Owen Roodenburg, Bianca Levkovich, Carlos Scheinkestel, David Pilcher, Andrew Udy
BACKGROUND: Propofol sedation is common in critically ill patients, providing energy of 1.1 kcal/mL when administered as a 1% solution. We aimed to determine the proportion of energy administered as propofol on days 1-5 in the intensive care unit (ICU) and any association with outcomes. METHODS: Retrospective observational study in a quaternary ICU from January-December 2012. Inclusion criteria were length of stay (LOS) ≥5 days, age ≥18 years, and provision of mechanical ventilation (MV) for ≥5 days...
August 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28799379/the-energetics-of-prenucleation-clusters-in-lattice-solutions
#11
Benjamin A Legg, James J De Yoreo
According to classical nucleation theory, nucleation from solution involves the formation of small atomic clusters. Most formulations of classical nucleation use continuum "droplet" approximations to describe the properties of these clusters. However, the discrete atomic nature of very small clusters may cause deviations from these approximations. Here, we present a self-consistent framework for describing the nature of these deviations. We use our framework to investigate the formation of "polycube" atomic clusters on a cubic lattice, for which we have used combinatoric data to calculate the thermodynamic properties of clusters with 17 atoms or less...
December 7, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28799050/environmental-building-policy-by-the-use-of-microalgae-and-decreasing-of-risks-for-canadian-oil-sand-sector-development
#12
Armen B Avagyan
Environmental building recommendations aimed towards new environmental policies and management-changing decisions which as example demonstrated in consideration of the problems of Canadian oil sands operators. For the implementation of the circular economic strategy, we use an in-depth analysis of reported environmental after-consequence on all stages of the production process. The study addressed the promotion of innovative solutions for greenhouse gas emission, waste mitigation, and risk of falling in oil prices for operators of oil sands with creating market opportunities...
August 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28795201/downstream-processing-technologies-capturing-and-final-purification-opportunities-for-innovation-change-and-improvement-a-review-of-downstream-processing-developments-in-protein-purification
#13
Nripen Singh, Sibylle Herzer
Increased pressure on upstream processes to maximize productivity has been crowned with great success, although at the cost of shifting the bottleneck to purification. As drivers were economical, focus is on now on debottlenecking downstream processes as the main drivers of high manufacturing cost. Devising a holistically efficient and economical process remains a key challenge. Traditional and emerging protein purification strategies with particular emphasis on methodologies implemented for the production of recombinant proteins of biopharmaceutical importance are reviewed...
August 10, 2017: Advances in Biochemical Engineering/biotechnology
https://www.readbyqxmd.com/read/28794316/highly-viscoelastic-reverse-wormlike-micellar-systems-from-a-mixture-of-lecithin-polyglycerol-fatty-acid-monoesters-and-an-oil
#14
Kaname Hashizaki, Miko Imai, Shuhei Yako, Hitomi Tsusaka, Yuichi Sakanishi, Yoshihiro Saito, Makiko Fujii
We report new lecithin reverse wormlike micelles with high viscoelasticity formed using lecithin/polyglycerol fatty acid monoester (PGLFA)/oil systems. In this study, the influence of the amphiphilicity (i.e., hydrophile-lipophile balance, HLB) of PGLFA on the phase behavior and rheological properties of reverse wormlike micelles was investigated in detail. PGLFAs with degrees of polymerization of polyglycerol varying between 6-40 and constituent fatty acids with chains between 6-18 carbon atoms long were used...
August 8, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28793187/interfacial-confined-colloidal-rod-diffusion
#15
Julie L Bitter, Yuguang Yang, Gregg Anthony Duncan, D Howard Fairbrother, Michael A Bevan
Optical microscopy is used to measure translational and rotational diffusion of colloidal rods near a single wall, confined between parallel walls, and within quasi-2D porous media as a function of rod aspect ratio and aqueous solution ionic strength. Translational and rotational diffusivities are obtained as rod particles experience positions closer to boundaries and for larger aspect ratios. Models based on position dependent hydrodynamic interactions quantitatively capture diffusivities in all geometries and indicate particle-wall separations in agreement with independent estimates based on electrostatic interactions...
August 9, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28789553/rrkm-and-master-equation-kinetic-analysis-of-parallel-addition-reactions-of-isomeric-radical-intermediates-in-hydrocarbon-flames
#16
Pierre M Winter, Michael Rheaume, Andrew L Cooksy
We have calculated the temperature-dependent rate coefficients of the addition reactions of butadien-2-yl (C4H5) and acroylyl (C3H3O) radicals with ethene (C2H4), carbon monoxide (CO), formaldehyde (H2CO), hydrogen cyanide (HCN), and ketene (H2CCO), in order to explore the balance between kinetic and thermodynamic control in these combustion-related reactions. For the C4H5 radical, the 1,3-diene form of the addition products is more stable than the 1,2-diene, but the 1,2-diene form of the radical intermediate is stabilized by an allylic delocalization, which may influence the relative activation energies...
August 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28783608/the-effect-of-applying-a-rinse-and-chill-procedure-to-lamb-carcases-immediately-post-death-on-meat-quality
#17
S M Fowler, J M Claus, D L Hopkins
The current study examined the effect of vascular rinsing lamb carcases (Rinse & Chill®) with a commercially available isotonic substrate solution (98.5% water; balance: glucose, polyphosphates, and maltose) at 14°C. Thirty, lamb carcases were randomly allocated to receive either the solution (n=15) 25 min post slaughter on a slaughter line or no solution (n=15). There was no apparent effect on the rate of pH decline due to infusion or muscle shortening of the M. longissimus thoracis et lumborum (LL), but there was a more than 50% reduction in toughness (lower shear force) of the LL due to infusion...
July 22, 2017: Meat Science
https://www.readbyqxmd.com/read/28783022/environmental-life-cycle-assessment-on-the-separation-of-rare-earth-oxides-through-solvent-extraction
#18
Ehsan Vahidi, Fu Zhao
Over the past decade, Rare Earth Elements (REEs) have gained special interests due to their significance in many industrial applications, especially those related to clean energy. While REEs production is known to cause damage to the ecosystem, only a handful of Life Cycle Assessment (LCA) investigations have been conducted in recent years, mainly due to lack of data and information. This is especially true for the solvent extraction separation of REEs from aqueous solution which is a challenging step in the REEs production route...
August 4, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28776013/cloud-activation-potentials-for-atmospheric-%C3%AE-pinene-and-%C3%AE-caryophyllene-ozonolysis-products
#19
Ariana Gray Bé, Mary Alice Upshur, Pengfei Liu, Scot T Martin, Franz M Geiger, Regan J Thomson
The formation of atmospheric cloud droplets due to secondary organic aerosol (SOA) particles is important for quantifying the Earth's radiative balance under future, possibly warmer, climates, yet is only poorly understood. While cloud activation may be parametrized using the surface tension depression that coincides with surfactant partitioning to the gas-droplet interface, the extent to which cloud activation is influenced by both the chemical structure and reactivity of the individual molecules comprising this surfactant pool is largely unknown...
July 26, 2017: ACS Central Science
https://www.readbyqxmd.com/read/28774625/halogen-specific-total-organic-halogen-analysis-assessment-by-recovery-of-total-bromine
#20
Markus Langsa, Sebastien Allard, Ina Kristiana, Anna Heitz, Cynthia A Joll
Determination of halogen-specific total organic halogen (TOX) is vital for studies of disinfection of waters containing bromide, since total organic bromine (TOBr) is likely to be more problematic than total organic chlorine. Here, we present further halogen-specific TOX method optimisation and validation, focusing on measurement of TOBr. The optimised halogen-specific TOX method was validated based on the recovery of model compounds covering different classes of disinfection by-products (haloacetic acids, haloacetonitriles, halophenols and halogenated benzenes) and the recovery of total bromine (mass balance of TOBr and bromide concentrations) during disinfection of waters containing dissolved organic matter and bromide...
August 2017: Journal of Environmental Sciences (China)
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