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相关概念视频

Factors Influencing Drug Absorption: Pharmaceutical Parameters01:28

Factors Influencing Drug Absorption: Pharmaceutical Parameters

192
Solid dosage forms such as tablets and capsules undergo rigorous manufacturing processes to ensure stability and effectiveness. Their dissolution and absorption properties are influenced significantly by the choice of excipients (inactive ingredients that serve various roles in the formulation), and the methodology applied during production. The manufacturing parameters, such as compression force and granulation techniques, significantly affect dissolution rates. Elevated compression forces...
192
Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry01:20

Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry

267
Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
267
Physical Properties Affecting Solubility02:19

Physical Properties Affecting Solubility

23.5K
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
23.5K
Factors Affecting Dissolution: Drug pKa, Lipophilicity and GI pH01:21

Factors Affecting Dissolution: Drug pKa, Lipophilicity and GI pH

2.0K
Drug absorption within the gastrointestinal (GI) tract is a complex process influenced by several critical factors, including the site pH, the drug's dissociation constant (pKa), and the drug's lipophilicity. The GI tract exhibits a pH gradient, with an acidic environment in the stomach and a more alkaline environment in the small intestine. This pH variation directly affects the ionization state of drugs.
A drug's pKa and the pH of the gastrointestinal (GI) tract play crucial roles...
2.0K
Factors Influencing Drug Absorption: Physicochemical Parameters01:22

Factors Influencing Drug Absorption: Physicochemical Parameters

437
The physicochemical characteristics of drugs play a crucial role in formulating stable and bioavailable drug products. The solubility of a drug, governed by the varying pH along the GI tract and its dissociation constant (pKa), is pivotal in determining its ionization state and absorption rate. Notably, weak acids and bases remain unionized and are absorbed more rapidly.
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
437

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相关实验视频

Updated: Sep 13, 2025

A Package of Established Analytical Tools to Investigate the Solid-State Alteration of Lipid-Based Excipients
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基于QbD的合理评估,对配方成分对可持续防晒物理稳定的影响.

Larissa Carniel1, Marina Gomes1, Giovana Carolina Bazzo1

  • 1Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, 88040-900, Brazil.

AAPS PharmSciTech
|July 30, 2025
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概括

这项研究使用了设计质量方法来优化可持续的防晒配方. 数学模型预测了最佳成分度,以提高身体稳定性和性能.

关键词:
这是一种乳液乳液.从设计开始的质量.稳定的稳定性 稳定的稳定性防晒可以防晒.可持续发展的化品

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Preparation of Keratin Hydrolysate from Chicken Feathers and Its Application in Cosmetics
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科学领域:

  • 化品科学 化品科学
  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 传统的化品乳液开发依赖于低效的试错方法.
  • 可持续的防晒配方需要一个系统的方法来确保有效性和稳定性.
  • 设计质量 (QbD) 为优化复杂配方提供了一个强大的框架.

研究的目的:

  • 应用设计质量方法来优化可持续的防晒配方.
  • 调查关键成分对防晒乳液物理稳定性和风湿性质的影响.
  • 开发预测性数学模型,以获得最佳的防晒成分.

主要方法:

  • 采用2^3全因数设计来评估成分对乳化车辆粘度和不稳定性的影响.
  • 评估了活性成分 (氧化,二氧化) 和稳定剂 (植物酸) 对防晒不稳定性的影响.
  • 利用强大的数学建模来预测最佳的配方参数.

主要成果:

  • 自乳化剂,共乳化剂和凝剂度显著影响了乳化载体的粘度和稳定性.
  • 氧化和植物酸度是防晒配方不稳定的主要驱动因素.
  • 开发的预测模型确定了最佳度:8%的自我乳化剂,3%的共乳化剂,0.3%的凝剂,6.3%的氧化,2%的二氧化和1%的植物酸.

结论:

  • QbD方法成功地优化了可持续的防晒配方,以获得物理稳定性和性能.
  • 数学模型准确地预测了所需产品属性的成分度.
  • 优化的配方符合质量目标产品配置文件,包括SPF,耐水性和抗氧化特性.