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https://www.readbyqxmd.com/read/27914756/the-colloid-controversy-are-colloids-bad-and-what-are-the-options
#1
REVIEW
Christine Wong, Amie Koenig
Biologic and synthetic colloid solutions are frequently used to increase oncotic pressure and to treat shock. Research has shown that each product has both risks and benefits. Hydroxyethyl starches have gained a reputation for increasing risk of death, acute kidney injury, and coagulation abnormalities in people, but additional studies are needed to see whether these concerns hold true in veterinary patients. This article reviews the risks and benefits of currently available products.
December 1, 2016: Veterinary Clinics of North America. Small Animal Practice
https://www.readbyqxmd.com/read/27910742/review-article-fabricated-microparticles-an-innovative-method-to-minimize-the-side-effects-of-nsaids-in-arthritis
#2
Shaivad Shabee Hulhasan Abadi, Afrasim Moin, Gangadharappa Hosahalli Veerabhadrappa
Microparticles are polymeric bodies ranging 1-1000 µm that constitute a variety of forms such as microcapsules, microspheres, microcages, microshells, microrods, biosensors microparticles, radiolabeled microparticles, and so forth. This review focuses on general microparticles, mainly microcapsules and microspheres. Nonsteriodal anti-inflammatory drugs (NSAIDs) are one of the mostcommonly prescribed medications in the world. Most of the NSAIDs available have severe side effects. With increased awareness of NSAID-induced gastrointestinal (GI) side effects, safety has become a priority in treatment of arthritis and other inflammatory diseases with NSAIDs...
2016: Critical Reviews in Therapeutic Drug Carrier Systems
https://www.readbyqxmd.com/read/27906387/hierarchically-porous-materials-synthesis-strategies-and-structure-design
#3
REVIEW
Xiao-Yu Yang, Li-Hua Chen, Yu Li, Joanna Claire Rooke, Clément Sanchez, Bao-Lian Su
Owing to their immense potential in energy conversion and storage, catalysis, photocatalysis, adsorption, separation and life science applications, significant interest has been devoted to the design and synthesis of hierarchically porous materials. The hierarchy of materials on porosity, structural, morphological, and component levels is key for high performance in all kinds of applications. Synthesis and applications of hierarchically structured porous materials have become a rapidly evolving field of current interest...
December 1, 2016: Chemical Society Reviews
https://www.readbyqxmd.com/read/27901504/evaluation-of-medicinal-plants-and-colloidal-silver-efficiency-against-vibrio-parahaemolyticus-infection-in-litopenaeus-vannamei-cultured-at-low-salinity
#4
María Soledad Morales-Covarrubias, Noemí García-Aguilar, María Del Bolan-Mejía, Ana Carmela Puello-Cruz
In shrimp aquaculture, reduction in the use of synthetic antibiotics is a priority due to the high incidence of resistant bacteria (Vibrio) in the white shrimp Litopenaeus vannamei. An increasing number of studies show bactericidal activity of natural treatments in aquaculture. The effectiveness of neem (Azadirachta indica) and oregano (Lippia berlandieri) aqueous extracts and colloidal silver against V. parahaemolyticus were evaluated in low salinity shrimp culture. Results show that aqueous extracts of oregano and neem each present a minimum inhibitory concentration (MIC) of 62...
November 22, 2016: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/27889443/the-application-of-silicon-sol-gel-technology-to-forensic-blood-substitute-development-mimicking-aspects-of-whole-human-blood-rheology
#5
Theresa Stotesbury, Mike Illes, Paul Wilson, Andrew J Vreugdenhil
Solution-gelation chemistry has promising applications in forensic synthetic blood substitute development. This research offers a silicon-based sol-gel approach to creating stable materials that share similar rheological properties to that of whole human blood samples. Room temperature, high water content, silicon sol-gels were created using the organosilane precursors 3-glycidoxypropyltrimethoxysilane and tetraethylorthosilicate along with various concentrations of filler and pigment. Shear-thinning non-Newtonian properties were observed within most formulations of the presented materials...
November 15, 2016: Forensic Science International
https://www.readbyqxmd.com/read/27877861/fabrication-of-photoactive-heterostructures-based-on-quantum-dots-decorated-with-au-nanoparticles
#6
Elisabetta Fanizza, Carmine Urso, R Maria Iacobazzi, Nicoletta Depalo, Michela Corricelli, Annamaria Panniello, Angela Agostiano, Nunzio Denora, Valentino Laquintana, Marinella Striccoli, M Lucia Curri
Silica based multifunctional heterostructures, exhibiting near infrared (NIR) absorption (650-1200 nm) and luminescence in the visible region, represent innovative nanosystems useful for diagnostic or theranostic applications. Herein, colloidal synthetic procedures are applied to design a photoactive multifunctional nanosystem. Luminescent silica (SiO2) coated quantum dots (QDs) have been used as versatile nanoplatforms to assemble on their surface gold (Au) seeds, further grown into Au spackled structures...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27858048/supracolloidal-reconfigurable-polyhedra-via-hierarchical-self-assembly
#7
Daniel Morphew, Dwaipayan Chakrabarti
Enclosed three-dimensional structures with hollow interiors have been attractive targets for the self-assembly of building blocks across different length scales. Colloidal self-assembly, in particular, has enormous potential as a bottom-up means of structure fabrication exploiting a priori designed building blocks because of the scope for tuning interparticle interactions. Here we use computer simulation study to demonstrate the self-assembly of designer charge-stabilised colloidal magnetic particles into a series of supracolloidal polyhedra, each displaying a remarkable two-level structural hierarchy...
November 18, 2016: Soft Matter
https://www.readbyqxmd.com/read/27820741/does-fluid-management-affect-the-occurrence-of-acute-kidney-injury
#8
Johan Mårtensson, Rinaldo Bellomo
PURPOSE OF REVIEW: To describe the potential impact of different fluid management strategies on renal outcomes in critically ill and postoperative patients. RECENT FINDINGS: Uncritical fluid administration may induce renal compartment syndrome and renal venous congestion, which contribute to kidney dysfunction. In more than 5000 randomized surgical or septic patients, goal-directed therapy did not reduce fluid accumulation, acute kidney injury (AKI) development or need for renal replacement therapy...
November 4, 2016: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/27812592/designed-synthesis-and-surface-engineering-strategies-of-magnetic-iron-oxide-nanoparticles-for-biomedical-applications
#9
REVIEW
Wei Wu, Chang Zhong Jiang, Vellaisamy A L Roy
Iron oxide nanoparticles (NPs) hold great promise for future biomedical applications because of their magnetic properties as well as other intrinsic properties such as low toxicity, colloidal stability, and surface engineering capability. Numerous related studies on iron oxide NPs have been conducted. Recent progress in nanochemistry has enabled fine control over the size, crystallinity, uniformity, and surface properties of iron oxide NPs. This review examines various synthetic approaches and surface engineering strategies for preparing naked and functional iron oxide NPs with different physicochemical properties...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27809479/designing-micro-and-nanoswimmers-for-specific-applications
#10
Jaideep Katuri, Xing Ma, Morgan M Stanton, Samuel Sánchez
Self-propelled colloids have emerged as a new class of active matter over the past decade. These are micrometer sized colloidal objects that transduce free energy from their surroundings and convert it to directed motion. The self-propelled colloids are in many ways, the synthetic analogues of biological self-propelled units such as algae or bacteria. Although they are propelled by very different mechanisms, biological swimmers are typically powered by flagellar motion and synthetic swimmers are driven by local chemical reactions, they share a number of common features with respect to swimming behavior...
November 3, 2016: Accounts of Chemical Research
https://www.readbyqxmd.com/read/27805180/n-and-o-doped-mesoporous-carbons-derived-from-rice-grains-efficient-metal-free-electrocatalysts-for-hydrazine-oxidation
#11
Katherine Koh, Yuying Meng, Xiaoxi Huang, Xiaoxin Zou, Manish Chhowalla, Tewodros Asefa
Nitrogen and oxygen co-doped mesoporous carbons that can serve as metal-free electrocatalysts are synthesized via a novel synthetic route using milled rice as a precursor and colloidal silica as a template. The materials efficiently electrocatalyze the hydrazine oxidation reaction with only a small onset potential, while giving a high peak current density and showing good long-term stability.
November 2, 2016: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/27803323/spatiotemporal-order-and-emergent-edge-currents-in-active-spinner-materials
#12
Benjamin C van Zuiden, Jayson Paulose, William T M Irvine, Denis Bartolo, Vincenzo Vitelli
Collections of interacting, self-propelled particles have been extensively studied as minimal models of many living and synthetic systems from bird flocks to active colloids. However, the influence of active rotations in the absence of self-propulsion (i.e., spinning without walking) remains less explored. Here, we numerically and theoretically investigate the behavior of ensembles of self-spinning dimers. We find that geometric frustration of dimer rotation by interactions yields spatiotemporal order and active melting with no equilibrium counterparts...
November 15, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27792330/exposing-the-dynamics-and-energetics-of-the-n-heterocyclic-carbene-nanocrystal-interface
#13
Haipeng Lu, Zhaohui Zhou, Oleg V Prezhdo, Richard L Brutchey
N-heterocyclic carbenes (NHCs) are becoming increasingly popular ligand frameworks for nanocrystal surfaces; however, as of yet, the nature of the NHC-nanocrystal interface remains unexplored across different material types. Here, we report a facile synthetic route to NHC-stabilized metal and metal chalcogenide nanocrystals. It was observed that NHC-Ag nanocrystals are colloidally stable, but much less so than the corresponding NHC-Ag2E analogs. Comprehensive NMR studies suggest a dynamic NHC-nanocrystal interface for both NHC-Ag and Ag2S; however, DFT calculations reveal a much stronger binding affinity of the NHC ligands to Ag2S compared to Ag nanocrystals, which explains the superior colloidal stability of the metal chalcogenides...
October 28, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27779578/does-small-volume-resuscitation-with-crystalloids-or-colloids-influence-hemostasis-and-survival-of-rabbits-subjected-to-lethal-uncontrolled-hemorrhage
#14
Bijan S Kheirabadi, Nahir Miranda, Irasema B Terrazas, Mary D Gonzales, Rose C Grimm, Michael A Dubick
INTRODUCTION: Prehospital, small-volume resuscitation of combat casualties with a synthetic colloid [6% hydroxyethyl starch (HES) 670/0.75] has been recommended when blood or blood components are unavailable. We studied hemostatic effects of a newer synthetic colloid (6% HES 130/0.4,) compared to either a natural colloid (albumin) or to crystalloids in an uncontrolled hemorrhage model. METHODS: Spontaneously breathing NZW rabbits (3.4±0.1 kg) were anesthetized, instrumented and subjected to a splenic injury with uncontrolled bleeding...
October 25, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27779114/novel-one-pot-and-facile-room-temperature-synthesis-of-gold-nanodots-and-application-as-highly-sensitive-and-selective-probes-for-cyanide-detection
#15
Nagamalai Vasimalai, Maria T Fernandez-Arguelles
Highly fluorescent gold nanodots have been synthesized through a novel rapid, facile and one-pot room temperature route using trithiocyanuric acid as mild reducing agent and surface ligand. The proposed synthesis overcomes limitations of other synthetic routes in terms of cost, time, complexity and environmental risks, and gives rise to highly fluorescent gold nanodots within 10 min at room temperature, with a maximum emission wavelength at 623 nm and a large Stokes shift (213 nm). Moreover, the synthesized gold nanodots showed a large emission QY (9...
November 25, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27776306/compact-secondary-treatment-train-combining-a-lab-scale-moving-bed-biofilm-reactor-and-enhanced-flotation-processes
#16
Catherine Brosseau, Bettina Émile, Marc-André Labelle, Édith Laflamme, Peter L Dold, Yves Comeau
High-rate wastewater processes are receiving a renewed interest to obtain energy positive/efficient water resource recovery facilities. An innovative treatment train combining a high-rate moving bed biofilm reactor (HR-MBBR) with an enhanced flotation process was studied. The two objectives of this work were 1) to maximize the conversion of soluble organics to particulate matter in an HR-MBBR and 2) to maximize the particulate matter recovery from the HR-MBBR effluent by green chemicals to enhance biogas production by anaerobic digestion...
October 8, 2016: Water Research
https://www.readbyqxmd.com/read/27774787/template-free-synthesis-of-hollow-porous-organosilica-fe3o4-hybrid-nanocapsules-towards-mri-guided-high-intensity-focused-ultrasound-therapy
#17
Ming Ma, Fei Yan, Minghua Yao, Zijun Wei, Dongliang Zhou, Heliang Yao, Hairong Zheng, Hangrong Chen, Jianlin Shi
Entirely differing from the common templating-based multistep strategy in fabricating multifunctional hollow mesoporous silica nanoparticles (HMSNs), a facile and template-free synthetic strategy has been established in constructing a unique hollow/mesoporous organosilica nanocapsule concurrently encapsulating both isopentyl acetate (PEA) liquid and superparamagnetic iron oxides inside (denoted as PEA@OSNCs). This novel material exhibits ultrasmall and uniform particle size (~82 nm), high surface area (~534 m2 g-1) and excellent colloidal stability in aqueous solution...
October 24, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27774553/tunable-slow-dynamics-in-a-new-class-of-soft-colloids
#18
Federica Lo Verso, José A Pomposo, Juan Colmenero, Angel J Moreno
By means of extensive simulations, we investigate concentrated solutions of globular single-chain nanoparticles (SCNPs), an emergent class of synthetic soft nano-objects. By increasing the concentration, the SCNPs show flattening, and even reentrant behaviour, in the density dependence of their structural and dynamic correlations, as well as a soft caging regime and weak dynamic heterogeneity. The latter is confirmed by validation of the Stokes-Einstein relation up to concentrations far beyond the overlap density...
October 24, 2016: Soft Matter
https://www.readbyqxmd.com/read/27714304/force-spectroscopy-predicts-thermal-stability-of-immobilized-proteins-by-measuring-microbead-mechanics
#19
Danijela Gregurec, Susana Velasco-Lozano, Sergio E Moya, Luis Vázquez, Fernando López-Gallego
Optimal immobilization of enzymes on porous microbeads enables the fabrication of highly active and stable heterogeneous biocatalysts to implement biocatalysis in synthetic and analytical chemistry. However, empirical procedures for enzyme immobilization still prevail over rational ones because there is an unmet need for more comprehensive characterization techniques that aid to understand and trace the immobilization process. Here, we present the use of atomic force spectroscopy (AFS) as an innovative solution to indirectly characterize immobilized proteins on porous materials and monitor the immobilization process in real time...
October 6, 2016: Soft Matter
https://www.readbyqxmd.com/read/27714206/pure-white-light-emitting-ultrasmall-organic-inorganic-hybrid-perovskite-nanoclusters
#20
Meghan B Teunis, Katie N Lawrence, Poulami Dutta, Amanda P Siegel, Rajesh Sardar
Organic-inorganic hybrid perovskites, direct band-gap semiconductors, have shown tremendous promise for optoelectronic device fabrication. We report the first colloidal synthetic approach to prepare ultrasmall (∼1.5 nm diameter), white-light emitting, organic-inorganic hybrid perovskite nanoclusters. The nearly pure white-light emitting ultrasmall nanoclusters were obtained by selectively manipulating the surface chemistry (passivating ligands and surface trap-states) and controlled substitution of halide ions...
October 14, 2016: Nanoscale
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