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Related Concept Videos

Constant Volume Calorimetry02:41

Constant Volume Calorimetry

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Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...
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Volume of Distribution01:20

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The apparent volume of distribution (Vd) is a crucial pharmacokinetic parameter representing the hypothetical body fluid volume into which a drug disperses. It is calculated based on the total amount of drug in the body (estimated from the administered dose and bioavailability) divided by the plasma drug concentration. The total amount of drug in the body does not directly refer to the dose given but is derived by accounting for absorption, distribution, metabolism, and excretion processes.
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Problem Solving: Volume01:13

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The volume of a fuel tank mounted on the wing of a jet aircraft can be modeled using the concept of solids of revolution. In this case, the tank is formed by rotating a two-dimensional region, defined by a mathematical function, about the x-axis. The region extends along the axis from zero to two meters, and the resulting three-dimensional shape is symmetric about the axis of rotation. Because the boundary curve lies directly against the axis, the disk method is an appropriate technique for...
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Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
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Work Done During Volume Change01:17

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In mechanics, work is done on an object when the force acting on it displaces the object. In thermodynamics, work done on a system can be estimated when the system's volume changes during any thermodynamic process.
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Related Experiment Video

Updated: Feb 7, 2026

Surgical Treatment for Benign Prostatic Hyperplasia: Holmium Laser Enucleation of the Prostate HoLEP.
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Myeloperoxidase and Prostate volume: A preliminary study.

T Roumeguère1, P Van Antwerpen2, L Vanhamme3

  • 1Laboratory of Experimental Medicine, Unit 222, ULB, CHU Charleroi, Charleroi, Belgium; Department of Urology, University Clinics of Brussels, ULB, Erasme Hospital, Brussels, Belgium.

Progres En Urologie : Journal De L'Association Francaise D'Urologie Et De La Societe Francaise D'Urologie
|July 26, 2018
PubMed
Summary
This summary is machine-generated.

This study found a negative correlation between myeloperoxidase (MPO) activity and prostate volume in men, suggesting MPO may play a role in benign prostatic hyperplasia (BPH) development. Further research is needed to confirm these findings.

Keywords:
AngiotensinAngiotensineMyeloperoxidaseMyéloperoxidaseOxidative stressProstate hyperplasiaStress oxydatifVolume prostatique

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Area of Science:

  • Urology
  • Biochemistry
  • Oxidative Stress Research

Background:

  • Oxidative stress is implicated in benign prostatic hyperplasia (BPH) development.
  • Myeloperoxidase (MPO), an enzyme involved in oxidative processes, has been detected in prostate tissue.

Purpose of the Study:

  • To investigate the correlation between MPO activity and prostate volume in patients with BPH.

Main Methods:

  • 121 patients (48-70 years) with BPH underwent blood sampling for MPO activity and prostate volume measurements via transrectal ultrasound.
  • Statistical analyses included Pearson's correlation and multilinear regression.

Main Results:

  • A negative correlation was observed between MPO specific activity and total prostate volume (TV) (Std Coef=-0.272, P=0.004).
  • MPO specific activity was also negatively correlated with transitional zone volume (TZ) (Std Coef=-0.21, P=0.016).
  • No correlation was found between MPO and Mox-LDL levels.

Conclusions:

  • A negative correlation exists between MPO activity and prostate volume, suggesting MPO's potential role in BPH.
  • Further longitudinal studies are warranted to elucidate MPO's contribution to prostatic diseases due to its DNA-oxidizing properties.