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https://www.readbyqxmd.com/read/28944974/granulomatous-enteritis-in-rainbow-trout-oncorhynchus-mykiss-associated-with-soya-bean-meal-regardless-of-water-dissolved-oxygen-level
#1
P Mosberian-Tanha, T Landsverk, C M Press, L T Mydland, J W Schrama, M Øverland
This study investigated morphological changes associated with soya bean meal-induced enteritis (SBMIE) in distal intestine (DI) of rainbow trout (Oncorhynchus mykiss) fed a soya bean meal (SBM)-based diet and exposed to normoxia or hypoxia created by optimal and low water flow rates, respectively. A 28-day adaption period was followed by a 42-day challenge period where 600 fish were subjected to dietary challenge and/or hypoxia. Twelve tanks each containing 50 juvenile trout were assigned randomly in triplicate to each treatment...
September 25, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28944797/a-rapid-scan-vacuum-ftir-method-for-determining-diffusion-coefficients-in-viscous-and-glassy-aerosol-particles
#2
Yun Zhang, Chen Cai, Shu-Feng Pang, Jonathan P Reid, Yun-Hong Zhang
We report a new method to investigate water transport kinetics in aerosol particles by using rapid scan FTIR spectroscopy combined with a custom-built pulse relative humidity (RH) control system. From real time in situ measurements of RH and composition using high time resolution infrared spectroscopy (0.12 s for one spectrum), and through achieving a high rate of RH change (as fast as 60% per second), we are able to investigate the competition between the gas and condensed phase diffusive transport limits of water for particles with mean diameter ∼3 μm and varying phase and viscosity...
September 25, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28942650/lability-and-basicity-of-bipyridine-carboxylate-phosphonate-ligand-accelerate-single-site-water-oxidation-by-ruthenium-based-molecular-catalysts
#3
David W Shaffer, Yan Xie, David J Szalda, Javier J Concepcion
A critical step in creating an artificial photosynthesis system for energy storage is designing catalysts that can thrive in an assembled device. Single-site catalysts have an advantage over bimolecular catalysts because they remain effective when immobilized. Hybrid water oxidation catalysts described here, combining the features of single-site bis-phosphonate catalysts and fast bimolecular bis-carboxylate catalysts, have reached turnover frequencies over 100 s(-1), faster than both related catalysts under identical conditions...
September 24, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28942319/highly-efficient-detection-of-salbutamol-in-environmental-water-samples-by-an-enzyme-immunoassay
#4
Zhenjiang Liu, Bo Zhang, Jianfan Sun, Yinhui Yi, Ming Li, Daolin Du, Fang Zhu, Jiawen Luan
Salbutamol (SAL) has potential hazardous effects on health, and has been found in natural water globally. To protect consumers from risks related to SAL residues, a fast and highly sensitive enzyme-linked immunosorbent assay (ELISA) was developed for the detection of SAL in environmental water samples. SAL hapten was synthesized and conjugated to proteins to be used as the immunogen for producing polyclonal antibodies. Under optimized conditions, the ELISA showed a 50% inhibitory concentration (IC50 value) of 0...
September 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28941402/copper-ii-ions-interactions-in-the-systems-with-triamines-and-atp-potentiometric-and-spectroscopic-studies
#5
S K Hoffmann, J Goslar, R Bregier-Jarzebowska, A Gasowska, A Zalewska, L Lomozik
The mode of interaction and thermodynamic stability of complexes formed in binary and ternary Cu(II)/ATP/triamines systems were studied using potentiometric and spectroscopic (NMR, EPR, UV-Vis) methods. It was found that in binary metal-free systems ATP/HxPA species are formed (PA: Spd=spermidine or 3,3-tri=1,7-diamino-4-azaheptane) where the phosphate groups from nucleotides are preferred negative centers and protonated amine groups of amines are positive centers of reaction. In the ternary systems Cu/ATP/Hx(PA) as well as Cu/(ATP)(PA) species are formed...
September 9, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28940841/a-superhydrophobic-smart-coating-for-flexible-and-wearable-sensing-electronics
#6
Lianhui Li, Yuanyuan Bai, Lili Li, Shuqi Wang, Ting Zhang
Superhydrophobic surfaces have shown versatile applications in waterproofing, self-cleaning, drag reduction, selective absorption, etc. The most convenient and universally applicable approach to forming superhydrophobic surfaces is by coating; however, currently, superhydrophobic, smart coatings with flexibility and multiple functions for wearable sensing electronics are not yet reported. Here, a highly flexible multifunctional smart coating is fabricated by spray-coating multiwalled carbon nanotubes dispersed in a thermoplastic elastomer solution, followed by treatment with ethanol...
September 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28940000/fabrication-of-novel-surface-imprinted-magnetic-graphene-oxide-grafted-cellulose-nanocrystals-for-selective-extraction-and-fast-adsorption-of-fluoroquinolones-from-water
#7
Nan Wang, Yan-Fei Wang, Ahmed M Omer, Xiao-Kun Ouyang
A novel adsorbent based on the surface of magnetic graphene oxide-grafted cellulose nanocrystal molecularly imprinted polymers (Mag@GO-g-CNCs@MIPs) was developed for the selective extraction and fast adsorption of fluoroquinolones (FQs) from river water samples. Cellulose nanocrystals (CNCs) were grafted onto activated graphene oxide (GO), and the surfaces of the obtained magnetic GO-g-CNC particles were molecularly imprinted with polymers using ofloxacin (OFX) as a template molecule and methacrylic acid (MAA) as a functional monomer...
September 22, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28939527/assessment-of-fructose-overload-in-the-metabolic-profile-and-oxidative-nitrosative-stress-in-the-kidney-of-senescent-female-rats
#8
Deborah Chianelli Costalonga Seraphim, Giovana Rita Punaro, Thamires de Oliveira Fernandes, Milton Ginoza, Guiomar Silva Lopes, Elisa Mieko Suemitsu Higa
The aging process is a complex phenomenon that leads the body to several changes, affecting its integrity and resulting in chronic pathologies, which compromises health and quality of life of elderly people. Animals supplemented with fructose have been used as an experimental model for induction of insulin resistance. The objective of this study was to evaluate the metabolic effects and the levels of oxidative/nitrosative stress in the kidney of senescent rats with a high fructose intake. The animals were allocated into 4 groups: young control (Y), aged control (A), young fructose (YF) and aged fructose (AF)...
September 19, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28939402/improving-the-drug-release-of-naproxen-sodium-tablets-by-preparing-granules-and-tablets-with-a-preferred-mixing-ratio-of-hydrates
#9
Bär David, Debus Heiko, Grune Christian, Tosch Stephan, Fischer Wolfgang, Mäder Karsten, Imming Peter
Naproxen is a typical and well-known analgesic classified as non-steroidal anti-inflammatory drug (NSAID) and is commercialized as tablets or liquid-filled capsules. Naproxen is typically used as a sodium salt because of its better processability compared to Naproxen free acid. This entails hygroscopicity and gives rise to the existence of four different hydrates, which show polymorphic and pseudopolymorphic properties. Solid dosage forms containing Naproxen Sodium often have to be processed in an applicable dosage form by granulation and tablet compression...
September 19, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28938056/short-term-effects-of-light-quality-on-leaf-gas-exchange-and-hydraulic-properties-of-silver-birch-betula-pendula
#10
Aigar Niglas, Kaisa Papp, Maciej Sekiewicz, Arne Sellin
Leaves have to acclimatize to heterogeneous radiation fields inside forest canopies in order to efficiently exploit diverse light conditions. Short-term effects of light quality on photosynthetic gas exchange, leaf water use and hydraulic traits were studied on Betula pendula Roth shoots cut from upper and lower thirds of the canopy of 39- to 35-year-old trees growing in natural forest stand, and illuminated with white, red or blue light in the laboratory. Photosynthetic machinery of the leaves developed in different spectral conditions acclimated differently with respect to incident light spectrum: the stimulating effect of complete visible spectrum (white light) on net photosynthesis is more pronounced in upper-canopy layers...
September 1, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28937221/in-vivo-dissolution-and-systemic-absorption-of-immediate-release-ibuprofen-in-human-gastrointestinal-tract-under-fed-and-fasted-conditions
#11
Duxin Sun, Jason R Baker, Bo Wen, Ann Frances, Huixia Zhang, Alex Yu, Ting Zhao, Yasuhiro Tsume, Manjunath Pai, Barry Bleske, Xinyuan Zhang, R Lionberger, Allen Lee, Gordon Amidon, William L Hasler, Mark Koenigsknecht
PURPOSE: In vivo drug dissolution in the gastrointestinal (GI) tract is largely unmeasured. The purpose of this clinical study was to evaluate the in vivo drug dissolution and systemic absorption of the BCS Class IIa drug ibuprofen under fed and fasted conditions by direct sampling of stomach and small intestinal luminal content. Expanding current knowledge of drug dissolution in vivo will help to establish physiologically relevant in vitro models predictive of drug dissolution. METHODS: A multi-lumen GI catheter was orally inserted into the GI tract of healthy human subjects...
September 22, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28936499/low-cost-ionic-liquid-water-mixtures-for-effective-extraction-of-carbohydrate-and-lipid-from-algae
#12
Trang Q To, Kerryn Procter, Blake A Simmons, Suresh Subashchandrabose, Rob Atkin
Biomass based biofuels are already an important energy source, and will increasingly be so in the future as the need for renewable energy rises. Due to their fast multiplication rates, algae can provide a sustainable supply of biomass, and are attractive because they do not compete with food crops for habitat. Here we show that biomass derived from Chlorella vulgaris and Spirulina platensis can be pretreated with low cost choline amino acid based ionic liquids to effectively yield lipids (30.6% and 51% total lipids) and sugars (71% and 26% total sugars)...
September 22, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28936274/a-review-on-wax-printed-microfluidic-paper-based-devices-for-international-health
#13
REVIEW
S Altundemir, A K Uguz, K Ulgen
Paper-based microfluidics has attracted attention for the last ten years due to its advantages such as low sample volume requirement, ease of use, portability, high sensitivity, and no necessity to well-equipped laboratory equipment and well-trained manpower. These characteristics have made paper platforms a promising alternative for a variety of applications such as clinical diagnosis and quantitative analysis of chemical and biological substances. Among the wide range of fabrication methods for microfluidic paper-based analytical devices (μPADs), the wax printing method is suitable for high throughput production and requires only a commercial printer and a heating source to fabricate complex two or three-dimensional structures for multipurpose systems...
July 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28935241/fluorescence-based-multi-parameter-approach-to-characterize-dynamics-of-organic-carbon-faecal-bacteria-and-particles-at-alpine-karst-springs
#14
Simon Frank, Nadine Goeppert, Nico Goldscheider
Karst springs, especially in alpine regions, are important for drinking water supply but also vulnerable to contamination, especially after rainfall events. This high variability of water quality requires rapid quantification of contamination parameters. Here, we used a fluorescence-based multi-parameter approach to characterize the dynamics of organic carbon, faecal bacteria, and particles at three alpine karst springs. We used excitation emission matrices (EEMs) to identify fluorescent dissolved organic material (FDOM)...
September 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28934694/development-and-implementation-of-a-pass-fail-field-friendly-method-for-detecting-sildenafil-in-suspect-pharmaceutical-tablets-using-a-handheld-raman-spectrometer-and-silver-colloids
#15
Adam Lanzarotta, Lisa Lorenz, JaCinta S Batson, Cheryl Flurer
A simple, fast, sensitive and effective pass/fail field-friendly method has been developed for detecting sildenafil in suspect Viagra and unapproved tablets using handheld Raman spectrometers and silver colloids. The method involves dissolving a portion of a tablet in water followed by filtration and addition of silver colloids, resulting in a solution that can be measured directly through a glass vial. Over one hundred counterfeit Viagra and unapproved tablets were examined on three different devices during the method development phase of the study...
September 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28934655/nano-sized-emission-from-commercially-available-paints-used-for-indoor-surfaces-during-drying
#16
Rikke Bramming Jørgensen, Ingrid Grav Hveding, Karoline Solheim
Consumers worry about the presence of nano-particles in paints and the risk of exposure. As a result, the paint industry now omits marketing paints as containing nanoparticles. The industry claims that no nanoparticles are released into the indoor environment; this, however, has yet to be documented. In this study, the emission of nano-sized emission from four indoor paints was investigated. The emission was studied for both base and full-pigmented versions of the paints, which consisted of three water-borne acrylic paints and one solvent-borne alkyd paint...
September 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28933841/supramolecular-self-assembly-and-dual-switch-vapochromic-vapoluminescent-and-resistive-memory-behaviors-of-amphiphilic-platinum-ii-complexes
#17
Yongguang Li, Ling Chen, Yeye Ai, Eugene Yau-Hin Hong, Alan Kwun-Wa Chan, Vivian Wing-Wah Yam
A series of amphiphilic platinum(II) complexes with tridentate N-donor ligands has been synthesized and characterized. Different supramolecular architectures are constructed using the amphiphilic molecules as the building blocks through the formation of Pt···Pt and π-π stacking interactions in aqueous media. The aggregation-deaggregation-aggregation self-assembly behavior together with obvious spectroscopic changes could be fine-tuned by the addition of THF in aqueous media. More interestingly, one of the complexes is found to show fast response and high selectivity toward alcohol and water vapors with good reversibility, leading to drastic color and luminescence changes, and hence unique dual switching behavior, with the water molecules readily displaced by the alcohol vapor...
September 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28933825/the-surface-chemistry-of-perovskite-type-electrodes-during-high-temperature-co2-electrolysis-investigated-by-operando-photoelectron-spectroscopy
#18
Alexander Karl Opitz, Andreas Nenning, Christoph Rameshan, Markus Kubicek, Thomas Götsch, Raoul Blume, Michael Hävecker, Axel Knop-Gericke, Gunther Rupprechter, Bernhard Klötzer, Juergen Fleig
Any substantial move of energy sources from fossil fuels to renewable resources requires large scale storage of excess energy, for example via power to fuel processes. In this respect electrochemical reduction of CO2 may become very important, since it offers a method of sustainable CO production, which is a crucial prerequisite for synthesis of sustainable fuels. Carbon dioxide reduction in solid oxide electrolysis cells (SOECs) is particularly promising owing to the high operating temperature, which leads to both improved thermodynamics and fast kinetics...
September 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28932618/a-simple-fast-and-inexpensive-simultaneous-determination-of-trace-bismuth-iii-and-lead-ii-in-water-samples-by-adsorptive-stripping-voltammetry
#19
Malgorzata Grabarczyk, Marzena Adamczyk
A simple, fast, and inexpensive voltammetric method for the simultaneous determination of trace bismuth(III) and lead(II) using (Hg(Ag)FE) as a working electrode was optimized. For adsorptive stripping voltammetric determination of Bi(III) and Pb(II) in a single scan, the cupferron was applied as a complexing agent. Experimental conditions under which these elements can be simultaneously detected include 0.1 mol L(-1) acetate buffer (pH = 4.6), 1 × 10(-4) mol L(-1) cupferron, accumulation potential -0...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28932197/antiplasmodial-activity-and-toxicological-assessment-of-curcumin-plga-encapsulated-nanoparticles
#20
Zulaikha A Busari, Kabiru A Dauda, Olajumoke A Morenikeji, Funmilayo Afolayan, Oyetunde T Oyeyemi, Jairam Meena, Debasis Sahu, Amulya K Panda
Curcumin is a polyphenolic pigment isolated from the rhizomes of Curcuma longa (turmeric), a medicinal plant widely used in the ancient Indian and Chinese medicine. The antiplasmodial activity of curcumin is often hampered by its fast metabolism and poor water solubility, thus its incorporation into a delivery system could circumvent this problem. This study aimed to evaluate the in vivo antiplasmodial activity and the toxicity assessment of curcumin incorporated into poly (lactic-co-glycolic) acid (PLGA) nanoparticles...
2017: Frontiers in Pharmacology
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