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Related Concept Videos

Stimulants01:29

Stimulants

1.0K
Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
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Vaporization01:18

Vaporization

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The physical form of a substance changes by changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. For vaporization to occur, kinetic energy must be greater than the intermolecular forces that keep molecules bonded. The amount of energy needed to vaporize a quantity of liquid at a given pressure and a constant temperature is called the heat of vaporization. When...
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Vapor Pressure02:34

Vapor Pressure

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When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...
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Electron Carriers01:24

Electron Carriers

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Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons.
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
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Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

3.1K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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Vapor Pressure Lowering03:28

Vapor Pressure Lowering

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The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates:
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Related Experiment Video

Updated: Feb 18, 2026

Comparing the Effects of Electronic Cigarette Vapor and Cigarette Smoke in a Novel In Vivo Exposure System
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Comparing the Effects of Electronic Cigarette Vapor and Cigarette Smoke in a Novel In Vivo Exposure System

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Views of Experienced Electronic Cigarette Users.

Raman Baweja1, Katherine M Curci2, Jessica Yingst3

  • 1Department of Psychiatry, Penn State University College of Medicine, 500 University Dr. Hershey PA 17033 USA.

Addiction Research & Theory
|November 28, 2017
PubMed
Summary

Electronic cigarette (e-cig) users report benefits like quitting smoking and improved health, but also experience side effects such as dry mouth. Further research is needed to understand long-term safety and effects.

Keywords:
DependenceElectronic cigaretteExperiencePublic HealthSmokingSurvey

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Area of Science:

  • Public Health
  • Consumer Product Research
  • Nicotine Addiction Studies

Background:

  • Electronic cigarette (e-cig) awareness and usage have surged recently.
  • Limited data exists on e-cig user experiences, satisfaction, opinions, and preferences.

Purpose of the Study:

  • To investigate the experiences, satisfaction, opinions, and preferences of electronic cigarette users.
  • To understand user-reported benefits and drawbacks of e-cig use.

Main Methods:

  • An online survey was completed by 1177 participants.
  • Data from 200 randomly selected participants were analyzed using qualitative and quantitative methods.

Main Results:

  • Key device characteristics include design, customizability, and vapor quality.
  • Positive aspects: smoking cessation aid, improved health, cost reduction.
  • Negative aspects: dry mouth, device reliability issues.
  • Usage patterns differ: more frequent but shorter puff sessions compared to cigarettes.

Conclusions:

  • E-cig use is perceived by users as a tool to quit or reduce smoking, potentially lowering health risks.
  • Users report increased frequency but decreased puff duration per session compared to cigarettes.
  • Further research is essential to ascertain e-cig safety and long-term health impacts.
  • Understanding user perspectives can inform healthcare professionals and regulators.