Related Experiment Video

Updated: Jan 25, 2026

Characterization of Biological Absorption Spectra Spanning the Visible to the Short-Wave Infrared
07:38

Characterization of Biological Absorption Spectra Spanning the Visible to the Short-Wave Infrared

Published on: January 10, 2025

3.1K

Tailoring grating strip widths for optimizing infrared absorption signals of an adsorbed molecular monolayer

T W W Maß, V H Nguyen, U Schnakenberg

    Optics Express
    |May 5, 2019
    PubMed

    More Related Videos

    Writing Bragg Gratings in Multicore Fibers08:48

    Writing Bragg Gratings in Multicore Fibers

    Published on: April 20, 2016

    8.6K
    In vivo Near Infrared Fluorescence NIRF Intravascular Molecular Imaging of Inflammatory Plaque, a Multimodal Approach to Imaging of Atherosclerosis09:43

    In vivo Near Infrared Fluorescence NIRF Intravascular Molecular Imaging of Inflammatory Plaque, a Multimodal Approach to Imaging of Atherosclerosis

    Published on: August 4, 2011

    18.5K

    Related Concept Videos

    Molecular Spectroscopy: Absorption and Emission01:14

    Molecular Spectroscopy: Absorption and Emission

    Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels.  Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
    4.4K
    Voltammetry: Stripping Methods01:13

    Voltammetry: Stripping Methods

    Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
    Anodic Stripping Voltammetry (ASV)
    ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
    856
    Drug Absorption: Factors Affecting GI Absorption01:19

    Drug Absorption: Factors Affecting GI Absorption

    The process of oral drug absorption can be influenced by several factors. Weakly acidic drugs tend to be absorbed more readily from the stomach due to their nonionized state. However, absorption may be less efficient in the upper intestine, where drugs are often ionized. Interestingly, despite the stomach's apparent advantage for drug absorption, its mucous layer can hinder diffusion. Its surface area is also smaller than the intestine's, which can further slow down the absorption rate.
    6.1K
    Carbohydrate Absorption01:25

    Carbohydrate Absorption

    Carbohydrates are essential macronutrients that serve as the body's primary energy source. Their digestion begins in the mouth, where salivary amylase partially breaks down complex carbohydrates such as starch into smaller oligosaccharides. This mechanical and enzymatic activity prepares carbohydrates for further processing in the gastrointestinal tract.
    After being swallowed, the partially digested carbohydrates mix with gastric secretions in the stomach. However, the acidic environment...
    3.1K
    Absorption of Nutrients01:19

    Absorption of Nutrients

    Absorption refers to taking dietary nutrients from the intestinal lumen for transportation throughout the body. After digestion in the small intestine, carbohydrates, proteins, and fats are broken down into simpler forms. These essential macronutrients and other vital substances, such as vitamins, minerals, and water, are then prepared for absorption into the bloodstream.
    Enterocytes, which are specialized polar epithelial cells, line the mucosa of the small intestinal walls. These cells...
    3.0K
    Protein Absorption01:12

    Protein Absorption

    Proteins in the gastrointestinal tract typically come from food, but they can also originate from disintegrated cells or secreted enzymes. In the stomach, the enzyme pepsin breaks down these proteins into polypeptides. The fragments then move into the duodenum as a semi-fluid mass called chyme. Pancreatic proteases, such as trypsin and chymotrypsin, and intestinal brush border enzymes like carboxypeptidases further dismantle the polypeptides into tripeptides, dipeptides, and free amino acids.
    967