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Colloid Solution

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1. Molecular mechanisms of mesoporous silica formation from colloid solution: Ripening-reactions arrest hollow network structures. Full Text available with Trip Pro

Molecular mechanisms of mesoporous silica formation from colloid solution: Ripening-reactions arrest hollow network structures. The agglomeration of silica nanoparticles in aqueous solution is investigated from molecular simulations. Mimicking destabilization of colloidal solutions by full removal of protective moieties or surface charge, association of SiO2/Si(OH)4 core/shell particles leads to rapid proton transfer reactions that account for local silanole → silica ripening reactions. Yet (...) , such virtually barrier-less binding is only observed within a limited contact zone. Agglomeration hence leads to the formation of oligomers of nanoparticles, whilst full merging into a compact precipitate is hampered by the need for extended structural reorganisation. Implementing sufficiently fast supply from colloidal solution, our simulations show the development of silica networks comprised of covalently bound, yet not fully merged nanoparticles. Within the oligomerized nanoparticle network, coordination

2019 PLoS ONE

2. Colloidal solution of silver nanoparticles for label-free colorimetric sensing of ammonia in aqueous solutions Full Text available with Trip Pro

Colloidal solution of silver nanoparticles for label-free colorimetric sensing of ammonia in aqueous solutions Silver nanoparticles were synthesized in the presence of saccharides and ammonia (NH3) in the concentration range from 10-2 to 103 ppm to develop an optical sensor for NH3 in aqueous solutions. Ammonia affects the features of the nanoparticles obtained in a concentration-dependent manner as determined by UV-vis absorption analysis and TEM observations. Structural and morphological

2018 Beilstein journal of nanotechnology

3. The Effects of Pre-Spinal Anesthesia Administration of Crystalloid and Colloid Solutions on Hypotension in Elective Cesarean Section Full Text available with Trip Pro

The Effects of Pre-Spinal Anesthesia Administration of Crystalloid and Colloid Solutions on Hypotension in Elective Cesarean Section Spinal anesthesia is an appropriate alternative for general anesthesia in many operations, particularly in cesarean section. However, the induced hypotension is the main drawback of this method. Therefore, the current study aimed at comparing the effects of crystalloid and colloid solutions used as the preload on the post-spinal hypotension and its complications (...) anesthesia, urine output, nausea, and vomiting were comparatively assessed between the two groups.The percentages of reduction in SBP and DBP variables in the crystalloid solution were higher than those of the colloid group and the differences were statistically significant (P = 0.042 and P = 0.008, respectively). Average percentage of HR changes was more significant in the crystalloid than the colloid group (P = 0.032). In contrary, administration of the two types of solutions did not result

2018 Anesthesiology and pain medicine Controlled trial quality: uncertain

4. Changes in colloid solution sales in Nordic countries. (Abstract)

Changes in colloid solution sales in Nordic countries. Administration of resuscitation fluid is a common intervention in the treatment of critically ill patients, but the right choice of fluid is still a matter of debate. Changes in medical practice are based on new evidence and guidelines as well as traditions and personal preferences. Official warnings against the use of hydroxyl-ethyl-starch (HES) solutions have been issued. Nordic guidelines have issued several strong recommendations (...) in the sales of HES solutions. A reduction in sales of other synthetic colloids has also occurred. During the same period, we found a 46% increase in albumin sales, but these numbers varied between Nordic countries.The general reduction in colloid sales likely reflects the recommendation that colloids should be used only in special circumstances. The dramatic reduction in the sales of HES solutions was expected given evidence of harm and the official warnings. The steady increase in albumin sales

2018 Acta Anaesthesiologica Scandinavica

5. Long-term Impact of Crystalloid versus Colloid Solutions on Renal Function and Disability-free Survival after Major Abdominal Surgery. (Abstract)

Long-term Impact of Crystalloid versus Colloid Solutions on Renal Function and Disability-free Survival after Major Abdominal Surgery. Balanced hydroxyethyl starch solution, as part of intraoperative goal-directed fluid therapy, is associated with better short-term outcomes than administration of a balanced crystalloid solution in patients having major open abdominal surgeryThe safety of modern hydroxyethyl starch solutions remains debated, with some studies in the intensive care setting have (...) a differenceDisability-free survival was higher in the colloid than in the crystalloid group BACKGROUND:: The authors recently demonstrated that administration of balanced hydroxyethyl starch solution as part of intraoperative goal-directed fluid therapy was associated with better short-term outcomes than administration of a balanced crystalloid solution in patients having major open abdominal surgery. In the present study, a 1-yr follow-up of renal and disability outcomes in these patients was performed.All

2018 Anesthesiology

6. Effect of infusion of equine plasma or 6% hydroxyethyl starch (600/0.75) solution on plasma colloid osmotic pressure in healthy horses. (Abstract)

Effect of infusion of equine plasma or 6% hydroxyethyl starch (600/0.75) solution on plasma colloid osmotic pressure in healthy horses. OBJECTIVE To compare the effects of equivalent volumes of equine plasma and 6% hydroxyethyl starch (600/0.75) solution (hetastarch) administered IV on plasma colloid osmotic pressure (pCOP) and commonly monitored clinicopathologic variables in horses. ANIMALS 6 healthy mares. PROCEDURES In a randomized, crossover study, horses were administered hetastarch

2017 American journal of veterinary research Controlled trial quality: uncertain

7. Structure and Dynamics of Bimodal Colloidal Dispersions in a Low-Molecular Weight Polymer Solution Full Text available with Trip Pro

Structure and Dynamics of Bimodal Colloidal Dispersions in a Low-Molecular Weight Polymer Solution We present an experimental study of the structural and dynamical properties of bimodal, micrometer-sized colloidal dispersions (size ratio ≈ 2) in an aqueous solution of low-molecular-weight polymer (polyethylene glycol 2000) using synchrotron ultra-small angle X-ray scattering (USAXS) and USAXS-based X-ray photon correlation spectroscopy. We fixed the volume fraction of the large particles at 5 (...) % and systematically increased the volume fraction of the small particles from 0 to 5% to evaluate their effects on the structure and dynamics. The bimodal dispersions were homogenous through the investigated parameter space. We found that the partial structure factors can be satisfactorily retrieved for the bimodal colloidal dispersions using a Percus-Yevick hard-sphere potential when the size distributions of the particles were taken into account. We also found that the partial structure factor between the large

2017 Langmuir : the ACS journal of surfaces and colloids

8. Effect of Intraoperative Goal-directed Balanced Crystalloid versus Colloid Administration on Major Postoperative Morbidity: A Randomized Trial (Abstract)

Effect of Intraoperative Goal-directed Balanced Crystalloid versus Colloid Administration on Major Postoperative Morbidity: A Randomized Trial Crystalloid solutions leave the circulation quickly, whereas colloids remain for hours, thus promoting hemodynamic stability. However, colloids are expensive and promote renal toxicity in critical care patients. This study tested the hypothesis that goal-directed colloid administration during elective abdominal surgery decreases 30-day major (...) complications more than goal-directed crystalloid administration.In this parallel-arm double-blinded multicenter randomized trial, adults having moderate- to high-risk open and laparoscopically assisted abdominal surgery with general anesthesia were randomly assigned to Doppler-guided intraoperative volume replacement with 6% hydroxyethyl starch 130/0.4 (n = 523) or lactated Ringer's solution (n = 534). The primary outcome was a composite of serious postoperative cardiac, pulmonary, infectious

2019 EvidenceUpdates

9. Colloid Solution

Colloid Solution Colloid Solution Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Colloid Solution Colloid Solution Aka: Colloid (...) Solution II. Types Albumin 5% May be beneficial in (e.g. ) Avoid in Synthetic colloid (Hetastarch, Dextran 40 or 60) Not recommended (FFP) Used for reversal, not for volume expansion III. Advantages Remains in intravascular space for hours IV. Disadvantages Risk of sensitivity reactions V. References Loflin (2015) Crit Dec Emerg Med 29(9): 11-18 Images: Related links to external sites (from Bing) These images are a random sampling from a Bing search on the term "Colloid Solution." Click on the image

2018 FP Notebook

10. Are Colloids Better Than Crystalloids for Fluid Resuscitation in Critically Ill Patients?

Are Colloids Better Than Crystalloids for Fluid Resuscitation in Critically Ill Patients? Systematic Review Snapshot TAKE-HOME MESSAGE Colloid solutions offer no advantage over crystalloids for the resuscitation of critically ill patients. Are Colloids Better Than Crystalloids for Fluid Resuscitation in Critically Ill Patients? EBEM Commentators Brian Hohertz, MD Rawle A. Seupaul, MD Talmage M. Holmes, PhD, MPH Department of Emergency Medicine University of Arkansas for Medical Sciences Little (...) for allocation concealment. No pre- speci?ed subgroup analyses were conducted. When trials by Boldt were removed, the results were unchanged.* Commentary There has been considerable debate over the optimal intravenous solution Table. Risk of mortality in patients resuscitated with colloids versus crystalloids. Colloid N* RR 95% CI I 2 ,% Albumin or PPF 9,920 1.01 0.93–1.10 15 Hydroxylethyl starch 9,147 1.10 1.02–1.19 0 Modi?ed gelatin 506 0.91 0.49–1.72 0 Dextran 834 1.24 0.94–1.65 0 RR, Relative risk; CI

2015 Annals of Emergency Medicine Systematic Review Snapshots

11. The Interaction between Zein and Lecithin in Ethanol-Water Solution and Characterization of Zein-Lecithin Composite Colloidal Nanoparticles. Full Text available with Trip Pro

The Interaction between Zein and Lecithin in Ethanol-Water Solution and Characterization of Zein-Lecithin Composite Colloidal Nanoparticles. Lecithin, a naturally small molecular surfactant, which is widely used in the food industry, can delay aging, enhance memory, prevent and treat diabetes. The interaction between zein and soy lecithin with different mass ratios (20:1, 10:1, 5:1, 3:1, 2:1, 1:1 and 1:2) in ethanol-water solution and characterisation of zein and lecithin composite colloidal (...) nanoparticles prepared by antisolvent co-precipitation method were investigated. The mean size of zein-lecithin composite colloidal nanoparticles was firstly increased with the rise of lecithin concentration and then siginificantly decreased. The nanoparticles at the zein to lecithin mass ratio of 5:1 had the largest particle size (263 nm), indicating that zein and lecithin formed composite colloidal nanoparticles, which might aggregate due to the enhanced interaction at a higher proportion of lecithin

2016 PLoS ONE

12. Crystalloid versus Colloid for Intraoperative Goal-directed Fluid Therapy Using a Closed-loop System: A Randomized, Double-blinded, Controlled Trial in Major Abdominal Surgery (Abstract)

with fewer postoperative complications compared to balanced crystalloids in patients having major elective abdominal surgery.One hundred and sixty patients were enrolled in the protocol. All patients had maintenance-balanced crystalloid administration of 3 ml · kg · h. A closed-loop system delivered additional 100-ml fluid boluses (patients were randomized to receive either a balanced-crystalloid or colloid solution) according to a predefined goal-directed strategy, using a stroke volume and stroke (...) Crystalloid versus Colloid for Intraoperative Goal-directed Fluid Therapy Using a Closed-loop System: A Randomized, Double-blinded, Controlled Trial in Major Abdominal Surgery The type of fluid and volume regimen given intraoperatively both can impact patient outcome after major surgery. This two-arm, parallel, randomized controlled, double-blind, bi-center superiority study tested the hypothesis that when using closed-loop assisted goal-directed fluid therapy, balanced colloids are associated

2017 EvidenceUpdates

13. Effects of hetastarch 130/0.4 on plasma osmolality, colloid osmotic pressure and total protein in horses anaesthetised for elective surgical procedures. (Abstract)

Effects of hetastarch 130/0.4 on plasma osmolality, colloid osmotic pressure and total protein in horses anaesthetised for elective surgical procedures. Effects of lactated Ringer's solution (LRS) and hetastarch 130/0.4 (HES) on colloid osmotic pressure (COP), plasma osmolality (OSM) and total protein (TP) were investigated in 18 inhalational-anaesthetised healthy horses. Horses received 4-6 ml/kg LRS (LRS; n=9) or HES (HES; n=9) from anaesthesia induction through 60 min, after which all were

2018 The Veterinary record Controlled trial quality: uncertain

14. Crystalloid Versus Colloid Rapid Co-load for Cesarean Delivery Under Spinal Anesthesia

will receive the rapid co-loading with plasma solution A (PSA) 10ml/kg, from the initiation of spinal anesthesia, within 10 minutes. Active Comparator: Colloid Patients will receive rapid co-load of 6% volulyte (HES in acetated electrolyte) 10ml/kg, from the initiation of spinal anesthesia. Other: Colloid Patients will receive the rapid co-loading with 6% volulyte (HES in acetated electrolyte) 10ml/kg, from the initiation of spinal anesthesia, within 10 minutes. Outcome Measures Go to Primary Outcome (...) Crystalloid Versus Colloid Rapid Co-load for Cesarean Delivery Under Spinal Anesthesia Crystalloid Versus Colloid Rapid Co-load for Cesarean Delivery Under Spinal Anesthesia - Full Text View - ClinicalTrials.gov Hide glossary Glossary Study record managers: refer to the if submitting registration or results information. Search for terms x × Study Record Detail Saved Studies Save this study Warning You have reached the maximum number of saved studies (100). Please remove one or more studies

2018 Clinical Trials

15. Topical Colloidal Silver for the Treatment of Recalcitrant Chronic Rhinosinusitis Full Text available with Trip Pro

Topical Colloidal Silver for the Treatment of Recalcitrant Chronic Rhinosinusitis Background: The management of recalcitrant chronic rhinosinusitis (CRS) is challenged by difficult-to-treat polymicrobial biofilms and multidrug resistant bacteria. This has led to the search for broad-spectrum non-antibiotic antimicrobial therapies. Colloidal silver (CS) has significant antibiofilm activity in vitro and in vivo against S. aureus, MRSA, and P. aeruginosa. However, due to the lack of scientific (...) or improving the tonicity of the solution for better tolerability should be explored.

2018 Frontiers in microbiology

16. Pharmaceutical stability of colloidal saccharated iron oxide injection in normal saline Full Text available with Trip Pro

were conducted using various concentrations of glucose and sodium chloride (NaCl).Colloidal saccharated iron oxide injection was diluted in three different diluents (5% glucose solution, normal saline, and 10% NaCl solution), and its appearance, colloid particle diameter, and pH were assessed. Free iron ions, which cause adverse effects, such as nausea and vomiting, were separated from the colloid particle using a dialysis membrane for 24 h, and their concentration was determined.No difference (...) in the appearance, colloid diameter, and free iron ion fraction was observed after dilution in 5% glucose solution and normal saline. Conversely, an increased colloid aggregation and iron ion release were observed after dilution in 10% NaCl solution. Although iron colloid is unstable in acidic conditions (pH 4.0-6.0), normal diluents such as 5% glucose and normal saline did not cause colloid destabilization by pH change (pH > 8.0).Normal saline may be used as a diluent of colloidal saccharated iron oxide

2018 Journal of pharmaceutical health care and sciences

17. Cytokine and Chemokine Recovery Is Increased by Colloid Perfusates during Dermal Microdialysis Full Text available with Trip Pro

Cytokine and Chemokine Recovery Is Increased by Colloid Perfusates during Dermal Microdialysis Cytokines and chemokines play important roles in cell signalling, and microdialysis is a promising tool for monitoring these inflammation markers ex vivo. Therefore, the collecting of these mediators at the highest concentrations possible is crucial. Depending on the size of the mediator of interest, the collection of these high molecular mass molecules has thus far been difficult due to their low (...) recovery, even when using high cut-off (100 kDa) microdialysis membranes. This study aimed to optimize the recovery of various cytokines and chemokines by validating the use of different perfusates in cutaneous microdialysis, and comparing intravenous (i.v.) colloids, crystalloids, and a lipid emulsion formulations that are approved for i.v.In vitro and in vivo recovery experiments using six recombinant cytokines varying in molecular size (interleukin-2 (15 kDa), interleukin-6 (20.5 kDa), interleukin-8

2018 Materials

18. Exploration of Near-Infrared-Emissive Colloidal Multinary Lead Halide Perovskite Nanocrystals Using an Automated Microfluidic Platform Full Text available with Trip Pro

Exploration of Near-Infrared-Emissive Colloidal Multinary Lead Halide Perovskite Nanocrystals Using an Automated Microfluidic Platform Hybrid organic-inorganic and fully inorganic lead halide perovskite nanocrystals (NCs) have recently emerged as versatile solution-processable light-emitting and light-harvesting optoelectronic materials. A particularly difficult challenge lies in warranting the practical utility of such semiconductor NCs in the red and infrared spectral regions. In this context (...) , all three archetypal A-site monocationic perovskites-CH3NH3PbI3, CH(NH2)2PbI3, and CsPbI3-suffer from either chemical or thermodynamic instabilities in their bulk form. A promising approach toward the mitigation of these challenges lies in the formation of multinary compositions (mixed cation and mixed anion). In the case of multinary colloidal NCs, such as quinary Cs xFA1- xPb(Br1- yI y)3 NCs, the outcome of the synthesis is defined by a complex interplay between the bulk thermodynamics

2018 ACS nano

19. Extreme sensitive metasensor for targeted biomarkers identification using colloidal nanoparticles-integrated plasmonic unit cells Full Text available with Trip Pro

Extreme sensitive metasensor for targeted biomarkers identification using colloidal nanoparticles-integrated plasmonic unit cells Engineered terahertz (THz) plasmonic metamaterials have emerged as promising platforms for quick infection diagnosis, cost-effective and real-time pharmacology applications owing to their non-destructive and harmless interaction with biological tissues in both in vivo and in vitro assays. As a recent member of THz metamaterials family, toroidal metamaterials have (...) of low molecular-weight biomolecules (≈13 kDa) in diluted solutions using toroidal THz plasmonic unit cells.

2018 Biomedical optics express

20. The Translational and Rotational Dynamics of a Colloid Moving Along the Air-Liquid Interface of a Thin Film Full Text available with Trip Pro

The Translational and Rotational Dynamics of a Colloid Moving Along the Air-Liquid Interface of a Thin Film This study examines the translation and rotation of a spherical colloid straddling the (upper) air/liquid interface of a thin, planar, liquid film bounded from below by either a solid or a gas/liquid interface. The goal is to obtain numerical solutions for the hydrodynamic flow in order to understand the influence of the film thickness and the lower interface boundary condition. When (...) the colloid translates on a film above a solid, the viscous resistance increases significantly as the film thickness decreases due to the fluid-solid interaction, while on a free lamella, the drag decreases due to the proximity to the free (gas/liquid) surface. When the colloid rotates, the contact line of the interface moves relative to the colloid surface. If no-slip is assumed, the stress becomes infinite and prevents the rotation. Here finite slip is used to resolve the singularity, and for small

2018 Scientific reports

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