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Related Concept Videos

2° Amines to N-Nitrosamines: Reaction with NaNO201:20

2° Amines to N-Nitrosamines: Reaction with NaNO2

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Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
4.1K
Enhanced Elimination of Poison01:26

Enhanced Elimination of Poison

489
Poison can be effectively removed from the gastrointestinal (GI) tract through various decontamination procedures.
Antidotes serve a crucial role in counteracting the effects of poison by inhibiting enzymes responsible for producing harmful drug metabolites. In some cases, these toxic metabolites can be neutralized by endogenous cosubstrates, which are maintained at specific concentrations to prevent interaction with cellular macromolecules and subsequent cell death.
Renal excretion is the...
489
Physical Properties of Amines01:26

Physical Properties of Amines

3.0K
Amines with low molecular weight are usually gaseous at room temperature, while those with high molecular weight are liquid or solids in nature. Usually, low molecular weight amines have a rotten fish-like smell. Diamines typically have a pungent smell. For instance, cadaverine and putrescine, depicted in Figure 1, are two molecules responsible for decaying tissue.
3.0K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism01:37

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism

3.7K
Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.
3.7K
Toxic Reactions: Overview01:26

Toxic Reactions: Overview

958
When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
958
Anticholinesterase Agents: Poisoning and Treatment01:26

Anticholinesterase Agents: Poisoning and Treatment

813
Anticholinesterases, also known as cholinesterase inhibitors, work by blocking the breakdown of acetylcholine, leading to its accumulation in the synaptic cleft. This accumulation indirectly enhances both muscarinic and nicotinic actions. These agents are classified as reversible or irreversible based on their mechanism of action.     
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is...
813

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Updated: Jun 14, 2025

Preparation of Rat Skeletal Muscle Homogenates for Nitrate and Nitrite Measurements
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Preparation of Rat Skeletal Muscle Homogenates for Nitrate and Nitrite Measurements

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Nitrate: "the source makes the poison".

E F Bowles1, M Burleigh2, A Mira3

  • 1Department of Human Nutrition, School of Medicine, University of Glasgow, Glasgow, UK.

Critical Reviews in Food Science and Nutrition
|August 30, 2024
PubMed
Summary
This summary is machine-generated.

Dietary nitrate from vegetables benefits health, contrary to concerns about its carcinogenicity. The food source and matrix are key to understanding nitrate

Keywords:
Dietary nitrateHealthNitric oxide

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Area of Science:

  • Nutritional Science
  • Biochemistry
  • Public Health

Background:

  • Growing interest in dietary nitrate's health effects.
  • Concerns over nitrate's potential carcinogenicity lead to ADI recommendations.
  • Evidence suggests vegetable nitrate intake may be beneficial.

Purpose of the Study:

  • Examine the paradox of dietary nitrate and health.
  • Highlight the role of food source and matrix.
  • Provide evidence for therapeutic applications of dietary nitrate.

Main Methods:

  • Review of mechanistic and epidemiological evidence.
  • Analysis of nitrate's interaction with food matrix.
  • Assessment of nitric oxide generation and N-nitroso compound formation.

Main Results:

  • Vegetable-derived nitrate promotes nitric oxide generation.
  • Vegetable nitrate limits toxic N-nitroso compound formation.
  • Exceeding ADI with vegetable sources linked to health benefits.

Conclusions:

  • Dietary source and food matrix are critical for nitrate's health impact.
  • Re-evaluation of nitrate guidelines is needed.
  • Understanding nitrate's role can facilitate therapeutic uses.