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Related Concept Videos

pH01:24

pH

The potential of hydrogen (pH) is a measure of the acidity or basicity of a water-based solution determined by the concentration of hydronium ions (H3O+). In one liter of pure water at neutral pH, there are 1×10−7 moles of hydronium ions. However, the extensive range of hydronium ion concentrations present in water-based solutions makes measuring pH in moles cumbersome. Therefore, a pH scale was developed to convert moles of hydronium ions into the negative logarithm of the hydronium ion...
Measurement of Bioavailability: Pharmacodynamic Methods01:20

Measurement of Bioavailability: Pharmacodynamic Methods

Pharmacodynamic methods provide insights into a drug's effects on physiological processes over time and play a crucial role in understanding bioavailability and therapeutic efficacy. These methods can be broadly classified into acute pharmacological and therapeutic response approaches, each with distinct mechanisms and applications.The acute pharmacological response method directly correlates a drug's physiological effects, such as ECG or pupil diameter changes, to its time course in the body.
Calculating pH Changes in a Buffer Solution02:45

Calculating pH Changes in a Buffer Solution

A buffer can prevent a sudden drop or increase in the pH of a solution after the addition of a strong acid or base up to its buffering capacity; however, such addition of a strong acid or base does result in the slight pH change of the solution. The small pH change can be calculated by determining the resulting change in the concentration of buffer components, i.e., a weak acid and its conjugate base or vice versa. The concentrations obtained using these stoichiometric calculations can be used...
Buffer Effectiveness02:19

Buffer Effectiveness

Buffer solutions do not have an unlimited capacity to keep the pH relatively constant . Instead, the ability of a buffer solution to resist changes in pH relies on the presence of appreciable amounts of its conjugate weak acid-base pair. When enough strong acid or base is added to substantially lower the concentration of either member of the buffer pair, the buffering action within the solution is compromised.
The buffer capacity is the amount of acid or base that can be added to a given volume...
pH Scale02:41

pH Scale

Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
Tonicity in Animals00:59

Tonicity in Animals

The tonicity of a solution determines if a cell gains or loses water in that solution. The tonicity depends on the permeability of the cell membrane for different solutes and the concentration of nonpenetrating solutes in the solution within and outside of the cell. If a semipermeable membrane hinders the passage of some solutes but allows water to follow its concentration gradient, water moves from the side with low osmolarity (i.e., less solute) to the side with higher osmolarity (i.e.,...

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Related Experiment Video

Updated: Jun 7, 2026

The Use of an Automated System (GreenFeed) to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals
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[Comparative measurements on ruminal pH-value in cattle].

Katrin Schneider1, Johann Gasteiner, Thomas Guggenberger

  • 1Institut für Artgemässe Tierhaltung und Tiergesundheit der Höheren Bundeslehr- und Forschungsanstalt Raumberg-Gumpenstein, Raumberg-Gumpenstein, Osterreich.

Berliner Und Munchener Tierarztliche Wochenschrift
|November 4, 2010
PubMed
Summary
This summary is machine-generated.

Continuous monitoring of ruminal pH using an indwelling sensor accurately measures subacute rumen acidosis (SARA) in cattle. This innovative method provides reliable data for understanding rumen health and disease.

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Area of Science:

  • Rumen physiology and pathology
  • Animal health and nutrition
  • Ruminant metabolism

Context:

  • Subacute rumen acidosis (SARA) significantly impacts the health of high-yielding cattle.
  • Accurate determination of ruminal pH is crucial for managing SARA.
  • Existing methods for pH measurement have limitations, especially under acidic conditions.

Purpose:

  • To compare the accuracy of continuous indwelling sensor measurements with traditional sampling methods (rumen fistula, oral stomach tube) for determining ruminal pH.
  • To evaluate the reliability of the indwelling sensor system under varying dietary conditions and ruminal pH levels.
  • To assess the sensor system's performance against standardized pH dilutions.

Summary:

  • An indwelling sensor system for continuous ruminal pH measurement was compared to rumen fistula and oral stomach tube sampling in eight cannulated cattle across two dietary trials.
  • While no significant differences were found in Trial 1 (higher pH), all methods differed significantly in Trial 2 (lower pH), highlighting the sensor's utility in more acidic conditions.
  • The sensor system demonstrated high accuracy (r = 0.9984) and reliability when validated against standardized pH solutions, proving effective for continuous data collection.

Impact:

  • Provides a reliable and accurate method for continuous ruminal pH monitoring, crucial for diagnosing and managing SARA in cattle.
  • Offers an innovative tool for researchers investigating rumen physiology and pathology, enabling better understanding of metabolic disorders.
  • Facilitates improved animal health management strategies in high-yielding livestock by enabling precise monitoring of rumen environment.