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Light-dependent reactions of photosynthesis at the thylakoid membrane. Light-dependent reactions are certain photochemical reactions involved in photosynthesis, the main process by which plants acquire energy. There are two light dependent reactions: the first occurs at photosystem II (PSII) and the second occurs at photosystem I (PSI).
A nosebleed, also known as epistaxis, is an instance of bleeding from the nose. [1] Blood can flow down into the stomach, and cause nausea and vomiting . [ 8 ] In more severe cases, blood may come out of both nostrils . [ 9 ]
This word is taken from two Greek words, photos, which means light, and synthesis, which in chemistry means making a substance by combining simpler substances. So, in the presence of light, synthesis of food is called 'photosynthesis'. Noncyclic photophosphorylation through light-dependent reactions of photosynthesis at the thylakoid membrane.
If your nosebleed is heavy, he says you can spray several squirts of a decongestant nasal spray in your nostrils and then apply firm pressure on the soft parts of your nose for 10 minutes.
At the heart of a photosystem lies the reaction center, which is an enzyme that uses light to reduce and oxidize molecules (give off and take up electrons). This reaction center is surrounded by light-harvesting complexes that enhance the absorption of light. In addition, surrounding the reaction center are pigments which will absorb light. The ...
Ninety percent of nosebleeds (epistaxis) occur in Kiesselbach's plexus, whereas five to ten percent originate from Woodruff's plexus. [3] It is exposed to the drying effect of inhaled air. [3] It can also be damaged by trauma from a finger nail (nose picking), as it is fragile. [3] [4] It is the usual site for nosebleeds in children and young ...
He further observed and documented that the turbinates in the dependent nasal fossa fill when the patient is lying down. The nasal cycle is an alternation in both time and between left and right sides, with the total resistance in the nose remaining constant. The asymmetric airflow may have some benefit to overall olfactory sensitivity. [6]
A photooxygenation is a light-induced oxidation reaction in which molecular oxygen is incorporated into the product(s). [ 1 ] [ 2 ] Initial research interest in photooxygenation reactions arose from Oscar Raab's observations in 1900 that the combination of light, oxygen and photosensitizers is highly toxic to cells. [ 3 ]