Concentration Distribution Analysis
Concentration Distribution Analysis - Related Videos
14:11
Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
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Cited by 21 •
2016
We illustrate the application of 1H(15N,αγ)12C resonant nuclear reaction analysis (NRA) to quantitatively evaluate the density of hydrogen atoms on the surface, in the volume, and at an interfacial layer of solid materials. The near-surface hydrogen depth profiling of a Pd(110) single crystal and of SiO2/Si(100) stacks is described.
05:08
Concentration Dependence - Instructor Prep
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2020
Source: Smaa Koraym at Johns Hopkins University, MD, USA Preparation of SolutionsExpand Here, we show the preparation of solutions for 10 students working in pairs, with some excess. Please adjust quantities as needed. Put on a lab coat, splash-proof safety glasses, and nitrile gloves. Obtain a waste container for aqueous sodium thiosulfate in advance. Note: HCl is toxic and highly corrosive, and sodium thiosulfate is an irritant, so the solutions for this lab must be prepared in a...
19:16
The Importance of Correct Protein Concentration for Kinetics and Affinity Determination in Structure-function Analysis
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Cited by 26 •
2010
We apply label-free protein interaction analysis using Biacore X100 for structure-function analysis of the binding of several cystatin B mutants to papain through kinetic characterization. Calibration-free concentration analysis (CFCA) measures the concentration of protein with retained binding activity without the need for a standard curve. We show that confirmation of concentrations using CFCA increases the reliability of the kinetic analysis and that kinetic constants can reliably be...
08:46
Analysis and Specification of Starch Granule Size Distributions
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Cited by 2 •
2021
Presented here is a procedure for reproducible and statistically valid determinations of starch granule size distributions, and for specifying the determined granule lognormal size distributions using a two-parameter multiplicative form. It is applicable to all granule sizing analyses of gram-scale starch samples for plant and food science research.
02:41
Concentration Cells
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2020
A concentration cell is a type of a voltaic cell constructed by connecting two almost identical half-cells, both based on the same half-reaction and using the same electrode, differing only in the concentration of one redox species. A concentration cell's potential, therefore, is determined only by the concentration difference of the particular redox species. Consider the following voltaic cell: From the given information, the cell potential of this concentration cell can be calculated using...
FAQs
Concentration gradients arise when transport, mixing, diffusion, reaction, or flow conditions do not affect all regions equally. A distribution can therefore show where a species accumulates, becomes depleted, or changes rapidly. Engineers examine these spatial or temporal patterns to connect local concentration behavior with mass transfer performance and overall system operation.
Flow conditions strongly influence whether concentration differences persist or are reduced. Mixing can redistribute a component, diffusion can smooth local gradients, and reaction can create or consume species while they move through the system. Considering these effects together helps explain nonuniform fields and indicates whether a design promotes uniformity, separation, or localized accumulation.
Measurements and samples provide concentration values at selected locations or times, while computational models can represent concentration fields across an engineering system. Using either approach, or comparing their results, helps engineers identify gradients, accumulation, and depletion. The resulting pattern supports interpretation of transport behavior and evaluation of expected system performance.
A practical analysis begins by selecting the chemical component and the spatial locations or time points relevant to the system. Engineers then obtain measurements, samples, or model results and organize them into a concentration field or distribution. Examining gradients and regions of accumulation or depletion reveals how operating conditions affect the system.
The analysis supports mass-transfer evaluation, reactor optimization, and separation-process design. In environmental engineering, it helps assess how contaminants or dissolved substances are distributed. Industrial systems can use the resulting patterns to locate concentration extremes, evaluate process behavior, and identify design conditions that may improve performance or reduce unwanted accumulation.
Concentration patterns reveal locations where a component accumulates or becomes depleted, which can expose uneven operation within a system. Engineers can use that information to guide process control, adjust designs, and assess operating behavior. In environmental, chemical, and industrial applications, this interpretation also contributes to safer system design and performance prediction.