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  2. Photoplethysmogram - Wikipedia

    en.wikipedia.org/wiki/Photoplethysmogram

    A photoplethysmogram ( PPG) is an optically obtained plethysmogram that can be used to detect blood volume changes in the microvascular bed of tissue. [1] [2] A PPG is often obtained by using a pulse oximeter which illuminates the skin and measures changes in light absorption. [3] A conventional pulse oximeter monitors the perfusion of blood to ...

  3. Photolabile protecting group - Wikipedia

    en.wikipedia.org/wiki/Photolabile_protecting_group

    Photolabile protecting group. A photolabile protecting group ( PPG; also known as: photoremovable, photosensitive, or photocleavable protecting group) is a chemical modification to a molecule that can be removed with light. PPGs enable high degrees of chemoselectivity as they allow researchers to control spatial, temporal and concentration ...

  4. PPG Industries - Wikipedia

    en.wikipedia.org/wiki/PPG_Industries

    PPG Industries, Inc. is an American Fortune 500 company and global supplier of paints, coatings, and specialty materials. With headquarters in Pittsburgh, Pennsylvania, PPG operates in more than 70 countries around the globe. By revenue it is the largest coatings company in the world followed by Sherwin-Williams. [2] It is headquartered in PPG Place, an office and retail complex in downtown ...

  5. Postprandial glucose test - Wikipedia

    en.wikipedia.org/wiki/Postprandial_glucose_test

    A postprandial glucose (PPG) test is a blood glucose test that determines the amount of glucose in the plasma after a meal. [1] The diagnosis is typically restricted to postprandial hyperglycemia due to lack of strong evidence of co-relation with a diagnosis of diabetes. [1]

  6. Photoplethysmogram variability - Wikipedia

    en.wikipedia.org/wiki/Photoplethysmogram_variability

    Photoplethysmogram variability. The photoplethysmogram (PPG) measurement made at a peripheral site, such as the finger, ear or forehead represents the volume of blood in the vessel at the site of measurement. The PPG signal consists of pulses that reflect the change in vascular blood volume with each cardiac beat. Beat-to-beat fluctuations ...

  7. Akt/PKB signaling pathway - Wikipedia

    en.wikipedia.org/wiki/Akt/PKB_signaling_pathway

    Akt/PKB signaling pathway The Akt signaling pathway or PI3K-Akt signaling pathway is a signal transduction pathway that promotes survival and growth in response to extracellular signals. Key proteins involved are PI3K ( phosphatidylinositol 3-kinase) and Akt ( protein kinase B ).

  8. Polypropylene glycol - Wikipedia

    en.wikipedia.org/wiki/Polypropylene_glycol

    Polypropylene glycol or polypropylene oxide is the polymer (or macromolecule) of propylene glycol. [1] Chemically it is a polyether, and, more generally speaking, it's a polyalkylene glycol (PAG) H S Code 3907.2000. The term polypropylene glycol or PPG is reserved for polymer of low- to medium-range molar mass when the nature of the end-group ...

  9. Pteridophyte Phylogeny Group - Wikipedia

    en.wikipedia.org/wiki/Pteridophyte_Phylogeny_Group

    The Pteridophyte Phylogeny Group ( PPG) is an informal international group of systematic botanists who collaborate to establish a consensus on the classification of pteridophytes ( lycophytes and ferns) that reflects knowledge about plant relationships discovered through phylogenetic studies.