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Related Concept Videos

Specific Gravity of Aggregate01:19

Specific Gravity of Aggregate

Aggregates typically contain pores, which can be either permeable or impermeable. Considering the pores in the aggregates, the specific gravity of aggregates is defined in three different forms, namely, bulk or gross specific gravity, apparent specific gravity, and absolute specific gravity.
Bulk or gross specific gravity is calculated by taking the ratio of the mass of aggregates in the saturated surface-dry state to the total volume that includes both the solids and the voids within the...
Centrifugation01:05

Centrifugation

Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...
Gravimetry: Overview01:05

Gravimetry: Overview

Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...

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Hematologic reactions to some modern therapeutic measures.

Pennsylvania medical journal (1928)·2010
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Recent developments in hematology.

New York medicine·2010
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A comparative study of the lead content of street dirts in New York City in 1924 and 1934.

The Journal of industrial hygiene and toxicology·2010
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LEAD STUDIES : III. THE EFFECTS OF LEAD ON RED BLOOD CELLS. PART 1. CHANGES IN HEMOLYSIS.

The Journal of experimental medicine·2009
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LEAD STUDIES : III. THE EFFECTS OF LEAD ON RED BLOOD CELLS. PART 2. SURFACE PHENOMENA AND THEIR PHYSIOLOGICAL EXPLANATION.

The Journal of experimental medicine·2009
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LEAD STUDIES : III. THE EFFECTS OF LEAD ON RED BLOOD CELLS. PART 3. A CHEMICAL EXPLANATION OF THE REACTION OF LEAD WITH RED BLOOD CELLS.

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Related Experiment Video

Updated: Jun 19, 2026

Quantification of Cellular Densities and Antigenic Properties using Magnetic Levitation
05:25

Quantification of Cellular Densities and Antigenic Properties using Magnetic Levitation

Published on: May 17, 2021

A METHOD FOR THE DETERMINATION OF THE SPECIFIC GRAVITY OF RED BLOOD CELLS.

P Reznikoff1

  • 1Laboratories of Physiology of Harvard Medical School, Boston.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary

A new, simple method accurately measures red blood cell specific gravity quickly. This technique avoids chemical interactions, offering a faster alternative to traditional pycnometer methods.

Area of Science:

  • Hematology
  • Biophysics

Background:

  • Accurate specific gravity measurement of red blood cells is crucial for various hematological analyses.
  • Existing methods, such as pycnometry, can be time-consuming and prone to errors due to corpuscle-fluid interactions.

Purpose of the Study:

  • To introduce a novel, simple, and rapid method for determining red blood cell specific gravity.
  • To compare the accuracy and speed of the new method against established techniques.

Main Methods:

  • Development of a straightforward procedure for specific gravity determination.
  • Comparative analysis against pycnometer-based measurements.

Main Results:

  • The described method provides accurate specific gravity values for red blood cells.

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Quantitative Analysis of Viscoelastic Properties of Red Blood Cells Using Optical Tweezers and Defocusing Microscopy

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  • The new technique is significantly faster than pycnometer determinations.
  • This method effectively eliminates confounding chemical and physical interactions between cells and suspension fluids.

    • Conclusions:

    • The developed method offers a rapid and accurate alternative for red blood cell specific gravity assessment.
    • Its simplicity and avoidance of corpuscle-fluid interactions make it a valuable tool in hematology.