Capacity Degradation
Capacity Degradation - Related Videos
01:47
Lung Capacity
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2019
The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures. There are four defined lung volume measures: tidal volume, inspiratory reserve volume, expiratory reserve volume, and residual volume. Tidal volume is the amount of air inhaled and exhaled in a normal breath. Inspiratory...
07:31
Measuring the pH, Redox Chemistries, and Degradative Capacity of Macropinosomes using Dual-Fluorophore Ratiometric Microscopy
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Cited by 1 •
2021
We describe protocols for measuring pH, oxidative events, and protein digestion in individual macropinosomes in live cells. An emphasis is placed on dual-fluorophore ratiometric microscopy and the advantages it offers over population-based techniques.
02:58
Regulated Protein Degradation
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2020
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells. Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
02:11
Proteins: From Genes to Degradation
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2020
Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This is referred to as “The Central Dogma of Molecular Biology” - a term coined by Francis Crick. Central dogma is a firm principle in biology that defines the flow of genetic information within any life form. The two fundamental steps in central dogma are - transcription and translation. Transcription is the synthesis of RNA molecules by RNA...
07:43
Assaying Proteasomal Degradation in a Cell-free System in Plants
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Cited by 26 •
2014
Targeted protein degradation represents a major regulatory mechanism for cell function. It occurs via a conserved ubiquitin-proteasome pathway, which attaches polyubiquitin chains to the target protein that then serve as molecular “tags” for the 26S proteasome. Here, we describe a simple and reliable cell-free assay for proteasomal degradation of proteins.
FAQs
At electrode surfaces, solid-electrolyte interphase growth consumes electrolyte and cyclable lithium or other charge carriers, while continued electrolyte decomposition removes additional electrochemically useful material. These reactions can increase resistance and reduce the charge available for normal electrode reactions. Monitoring both processes helps chemists connect surface chemistry with declining battery performance and evaluate improved electrolyte or electrode formulations.
Some capacity changes can recover when operating conditions change, whereas permanent damage reflects chemical or structural alterations that cannot be restored through ordinary cycling. Separating these behaviors prevents researchers from misinterpreting temporary performance changes as material failure. The distinction supports more accurate aging models and helps identify whether improved charging conditions or redesigned battery components are needed.
Repeated charge-discharge cycling repeatedly stresses electrode materials and interfaces, allowing degradation reactions to accumulate. Elevated temperature can accelerate chemical changes such as interphase growth and electrolyte decomposition, while prolonged storage can also alter the battery even without active cycling. Comparing these conditions reveals which stresses dominate and guides thermal management, storage recommendations, and charging-protocol design.
Permanent loss can result from depletion of cyclable lithium or other charge carriers, loss of active electrode material, and structural changes within electrode materials. These changes reduce the amount of material that can participate in subsequent electrochemical reactions. Their combined effects help explain why a battery may retain some function while delivering progressively less usable energy during later operation.
Chemists combine electrochemical testing with materials characterization and aging models. Electrochemical measurements track performance as batteries undergo selected cycling, temperature, or storage conditions, while characterization examines chemical and structural changes in electrodes and interfaces. Aging models organize these observations over time, helping researchers associate measured capacity loss with specific degradation mechanisms rather than treating it as a single unexplained effect.
Findings about degradation guide choices of electrode materials, electrolytes, charging protocols, and thermal-management strategies. These design variables can be adjusted to limit damaging chemical reactions and structural changes. The resulting improvements matter across portable electronics, electric vehicles, and grid storage, where longer battery lifetime, reliable performance, safety, and predictable energy delivery are important outcomes.