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Drugs for Peptic Ulcer Disease: Sucralfate as Mucosal Protective Agents01:24

Drugs for Peptic Ulcer Disease: Sucralfate as Mucosal Protective Agents

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In the intricate landscape of the gastric lumen, excessive acid secretion disrupts the natural defense mechanisms, weakening the mucus-bicarbonate barrier. This vulnerability allows pepsin to infiltrate epithelial cells, digesting mucosal proteins and triggering erosion, leading to ulcer formation.
In this scenario, mucosal protective agents like sucralfate play an essential role. Sucralfate, a complex of sulfated sucrose and aluminum hydroxide, demonstrates its usefulness in acidic conditions,...
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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.
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1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview01:26

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

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Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
3.8K
Acid Suppressive Drugs for Peptic Ulcer Disease: Antacids01:31

Acid Suppressive Drugs for Peptic Ulcer Disease: Antacids

607
In the complex environment of the gastric lumen, excessive acid secretion can lead to the formation or worsening of ulcers within the delicate mucosal layer. Antacids, such as sodium bicarbonate and calcium carbonate, provide relief by neutralizing this acid, transforming it into harmless salt and water. This neutralization process raises the gastric pH from a highly acidic level of 1 to a more basic 3-4, reducing the acidity within the stomach.
However, this neutralization reaction between...
607
Acids, Bases and Neutralization Reactions03:26

Acids, Bases and Neutralization Reactions

63.5K
An acid-base reaction is one in which a hydrogen ion, H+, is transferred from one chemical species to another. Such reactions are of central importance to numerous natural and technological processes, ranging from the chemical transformations within cells or lakes and oceans to the industrial-scale production of fertilizers, pharmaceuticals, and other substances essential to the society.
63.5K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism01:37

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

4.7K
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.
4.7K

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Related Experiment Video

Updated: Jan 10, 2026

A General Method for Evaluating Incubation of Sucrose Craving in Rats
12:44

A General Method for Evaluating Incubation of Sucrose Craving in Rats

Published on: November 4, 2011

13.7K

Adding Nitrate to a Sucrose Rinse Reduces Acidogenicity: An in vivo Study.

Consuelo A Silva-Acevedo1, Bob T Rosier2, Cesia J Vargas1

  • 1Master Program in Oral and Maxillofacial Health Sciences, Faculty of Dentistry, University of Talca, Talca, Chile.

Caries Research
|November 24, 2025
PubMed
Summary

Adding nitrate to sugar rinses can reduce immediate saliva acidification, a potential dental health benefit. This study shows nitrate

Keywords:
AcidogenicityLocal effectOral prebioticsSalivary pHSucrose

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Area of Science:

  • Oral Health Research
  • Biochemistry
  • Dental Pharmacology

Background:

  • Nitrate's dental health benefits, like pH buffering, are known when consumed hours before sugar.
  • The immediate local effect of nitrate co-administered with sugar on saliva pH is not well understood.

Purpose of the Study:

  • To investigate the immediate local effect of adding nitrate to a sugar rinse on human saliva acidification.
  • To assess the impact of co-administered nitrate and sugar on salivary pH and acid production.

Main Methods:

  • A double-blind, crossover study involving 18 adults.
  • Participants rinsed with spinach-only (nitrate), spinach+sucrose (nitrate and sucrose), or sucrose-only solutions.
  • Saliva pH, lactate, nitrate, and nitrite levels were measured post-rinsing.

Main Results:

  • The spinach+sucrose rinse significantly limited the pH drop compared to sucrose-only.
  • Saliva pH returned to baseline faster with the spinach+sucrose rinse.
  • Increased nitrate and nitrite levels were observed with spinach rinses, with lower lactate suggesting proton consumption.

Conclusions:

  • Incorporating nitrate into a sucrose rinse effectively reduces sugar-induced salivary acidification in vivo.
  • Topical nitrate application shows promise for mitigating the acidogenicity of sugars in the oral cavity.
  • Further research into topical nitrate strategies for dental health is supported.