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Deleterious Substances in Aggregate01:25

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Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
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Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
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One of the significant functions of connective tissue is connecting tissues and organs. Unlike epithelial tissue that is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that are embedded within it. It plays a significant role in the functioning of this tissue. The major component of the matrix is a...
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Related Experiment Video

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Unveiling Resveratrone: A High-Performance Antioxidant Substance.

Eunhak Lim1,2, Kyung-Eun Gil1,2, Kyoung-Chan Park3

  • 1Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 08826, Republic of Korea.

Antioxidants (Basel, Switzerland)
|January 28, 2026
PubMed
Summary

Resveratrone, a novel compound derived from resveratrol, demonstrates significant skin health benefits. This compound exhibits superior antioxidant, anti-aging, and skin-regenerating properties compared to resveratrol.

Keywords:
antibacterialantioxidantascorbic acidcollagenproliferationresveratrolresveratronewhitening

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Area of Science:

  • Dermatology and cosmetic science
  • Natural product chemistry

Background:

  • Resveratrol is a well-known antioxidant and anti-aging compound.
  • Resveratrone is a novel compound discovered through photo-conversion of resveratrol.
  • The skin health benefits of resveratrone are largely unstudied.

Purpose of the Study:

  • To investigate the various effects of resveratrone on skin health.
  • To compare the efficacy of resveratrone with resveratrol for skin applications.

Main Methods:

  • The study evaluated resveratrone's effects on skin health parameters.
  • Comparative analysis between resveratrone and resveratrol was performed.

Main Results:

  • Resveratrone exhibits potent antioxidant and anti-aging properties.
  • The compound demonstrated significant benefits in skin whitening, wrinkle reduction, skin regeneration, and anti-acne activity.
  • Resveratrone outperformed resveratrol in most tested skin health areas.

Conclusions:

  • Resveratrone is a promising ingredient for enhancing skin health.
  • Its unique molecular structure confers superior benefits over resveratrol for cosmetic applications.