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Related Concept Videos

Qualitative Analysis03:46

Qualitative Analysis

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For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
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Precipitation of Ions03:11

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Predicting Precipitation
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Solubility Equilibria03:07

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Solubility equilibria are established when the dissolution and precipitation of a solute species occur at equal rates. These equilibria underlie many natural and technological processes, ranging from tooth decay to water purification. An understanding of the factors affecting compound solubility is, therefore, essential to the effective management of these processes. This section applies previously introduced equilibrium concepts and tools to systems involving dissolution and precipitation.
The...
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Upper GI Series: Barium Swallow01:24

Upper GI Series: Barium Swallow

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The Barium Swallow Study, or a Barium Esophagogram, is a diagnostic imaging method used to visualize the upper gastrointestinal (GI) tract, including the esophagus, stomach, and small intestine. It employs barium sulfate, a radiopaque contrast material, to provide clear images of the upper digestive system, helping to identify abnormalities, diseases, or structural issues.
Purpose and Procedure
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Gravimetry: Inorganic And Organic Precipitating Agents00:49

Gravimetry: Inorganic And Organic Precipitating Agents

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In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
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Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
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Synthesis and Characterization of BaSO.

Mohammad S Kader1, Conner Weyer1, Abigail Avila2

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|March 1, 2023
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A novel barium sulfate and calcium carbonate nanoparticle-alginate gel offers enhanced X-ray contrast for vascular imaging. This nanocomposite provides improved performance for microcomputed tomography and medical perfusion applications.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Medical Imaging

Background:

  • Microcomputed tomography (micro-CT) is crucial for differentiating vascular networks from tissues with similar X-ray attenuation.
  • Current clinical X-ray contrast agents utilize microscale barium sulfate (BaSO4) particles.

Purpose of the Study:

  • To develop and characterize a novel nanoscale composite contrast agent for improved medical perfusion and vascular imaging.
  • To create a barium sulfate (BaSO4) and calcium carbonate (CaCO3) nanoparticle-alginate gel with enhanced performance over existing microscale agents.

Main Methods:

  • Synthesized BaSO4 and CaCO3 nanoparticles using a polyol method with tetraethylene glycol.
  • Encapsulated nanoparticles within an alginate gel matrix to create a nanocomposite contrast agent.
  • Controlled gelation time using d-(+)-gluconic acid δ-lactone and minimized rapid cross-linking by Ba2+ through surface sulfate excess on BaSO4 nanoparticles.

Main Results:

  • The resulting BaSO4-CaCO3 nanoparticle alginate gel exhibited good colloidal stability, viscosity control, and final gel stiffness.
  • Achieved controlled gelation times between 30 and 35 minutes, suitable for full-body perfusion.
  • Characterized mechanical properties including storage modulus, peak stress, elastic modulus, and radiodensity.

Conclusions:

  • This study presents the first nanoscale composite of a radiopaque metal salt integrated with an alginate hydrogel for medical applications.
  • The developed nanocomposite demonstrates superior potential for vascular imaging and micro-CT applications compared to microscale agents.