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Related Concept Videos

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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UV–Vis Spectroscopy: Woodward–Fieser Rules01:29

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UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given structure by adding the...
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Spectrophotometry: Introduction01:16

Spectrophotometry: Introduction

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Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
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Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
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Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

1.4K
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
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UV–Vis Spectrum01:30

UV–Vis Spectrum

3.1K
When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.     
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Shadow analysis via the C+K Visioline: A technical note.

T Houser1,2, C Zerweck1, G Grove1

  • 1cyberDERM, inc., Broomall, PA, USA.

Skin Research and Technology : Official Journal of International Society for Bioengineering and the Skin (ISBS) [And] International Society for Digital Imaging of Skin (ISDIS) [And] International Society for Skin Imaging (ISSI)
|March 8, 2017
PubMed
Summary
This summary is machine-generated.

Shadow analysis effectively measures skin topography differences in photo-aged skin, correlating well with expert assessments of crow's feet severity using the Visioline VL 650 and advanced software.

Keywords:
anti-agingcrow's feetoptical profilometryreplicashadow analysisskinskin surface topographywrinkle analysis

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Area of Science:

  • Dermatology
  • Image Analysis
  • Biotechnology

Background:

  • Photoaging significantly alters skin topography.
  • Quantifying these changes is crucial for understanding skin aging and developing treatments.

Purpose of the Study:

  • To evaluate the accuracy of shadow analysis in assessing skin topography changes due to photoaging.
  • To determine the correlation between shadow analysis measurements and expert grading of crow's feet wrinkles.

Main Methods:

  • Skin impressions were collected from a standardized scale and the crow's feet region of 9 women.
  • Analyses were performed using Courage + Khazaka Visioline VL 650 and Image Pro Premiere 9.0 software.
  • Shadow analysis parameters were compared against expert grader ratings.

Main Results:

  • Shadow analysis accurately measured groove depths of known dimensions.
  • Several shadow analysis parameters correlated with expert ratings of crow's feet severity.
  • The Max Depth parameter showed a strong correlation, enhanced by Image Pro Premiere analysis.

Conclusions:

  • Shadow analysis is an effective method for measuring skin surface topography.
  • The Visioline VL 650, combined with advanced image analysis software, accurately assesses crow's feet severity.
  • This technique provides reliable data for understanding and quantifying photoaging effects.