Void Time
Void Time - Related Videos
06:39
Real-Time Void Spot Assay
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Cited by 14 •
2023
This article describes a new method to study mouse voiding behavior by incorporating video monitoring in the conventional void spot assay. This approach provides temporal, spatial, and volumetric information on the voiding events and details of mouse behavior during the light and dark phases of the day.
01:12
Total Voids in Concrete
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2024
Total voids in concrete encompass gel water volume, capillary pores, and entrapped air. Gel water (retained within the cement hydration products) and physically entrapped or adsorbed water are significant for the hydration process. For complete hydration, it's estimated that the space needed for the products of a cubic centimeter of cement doubles. Capillary pores constitute the unoccupied space within the hydrated cement paste, with their size largely influenced by the water-to-cement ratio...
01:22
Imaging Studies VI: Voiding Cystourethrography and Cystography
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2025
Voiding Cystourethrography (VCUG) and Cystography are specialized radiographic procedures used to examine the structure and function of the bladder and urethra.Voiding Cystourethrography (VCUG)A Voiding Cystourethrogram (VCUG) is a diagnostic imaging procedure that assesses the anatomy and function of the lower urinary tract. It focuses on the bladder, bladder neck, and urethra, helping detect abnormalities such as vesicoureteral reflux (VUR)—the backward or reverse flow of urine into the...
06:57
Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
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2020
Theoretical calculation and experimental verification are proposed for a reduction of threading dislocation (TD) density in germanium epitaxial layers with semicylindrical voids on silicon. Calculations based on the interaction of TDs and surface via image force, TD measurements, and transmission electron microscope observations of TDs are presented.
01:22
Generation Time
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2025
Bacterial generation time, the period required for a bacterial population to double during its exponential growth phase, serves as a critical measure of microbial growth dynamics under optimal conditions. This parameter varies significantly across bacterial species and can be influenced by factors such as temperature, pH, and the availability of nutrients. For example, Escherichia coli can achieve a generation time of approximately 20 minutes, while Mycobacterium tuberculosis exhibits a much...
FAQs
An unretained marker should follow the mobile-phase path through the column while avoiding significant stationary-phase interaction. Its detector-arrival interval therefore represents transit rather than analyte retention. This distinction lets chemists interpret a later analyte peak as evidence of stationary-phase retention only when its timing exceeds the relevant void-time reference.
Flow rate changes how quickly the mobile phase traverses the column, whereas column volume determines the amount of path available for that transit. Consequently, void time is an operating measurement rather than a universal constant. Chemists should account for these variables when comparing retention behavior under different chromatographic conditions.
Subtracting void time from an analyte’s measured retention time isolates the portion attributed to retention rather than simple mobile-phase passage. This adjusted value, together with void time, supports calculation of retention factors. The resulting interpretation helps distinguish chromatographic interaction from delay caused merely by transport through the column.
Void time provides a common reference for comparing separations when flow rate or column volume changes. Re-establishing the mobile-phase transit interval allows chemists to judge analyte retention relative to passage through the column, rather than comparing raw detector times alone. This supports more consistent peak identification and separation assessment.
In liquid chromatography, chemists estimate void time by using a marker expected to pass without significant stationary-phase interaction, then measuring the interval until its detector response. The marker’s arrival supplies the mobile-phase transit reference needed to interpret analyte retention times and calculate adjusted values during method development.
Void time is useful when optimizing or comparing chromatographic separations because the measurement links detector timing to column transit. With that reference, analysts can determine whether changes in observed analyte times reflect retention behavior or altered passage conditions. This supports peak assignment and evaluation of column performance.