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calvin cycle

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ลองค้นหาคำในรูปแบบอื่นๆ เพื่อให้ได้ผลลัพธ์มากขึ้นหรือน้อยลง: -calvin cycle-, *calvin cycle*
อังกฤษ-ไทย: คลังศัพท์ไทย โดย สวทช.
Calvin Cycleวัฎจักรแคลวิน [การแพทย์]
Calvin cycleวัฏจักรคัลวิน, ขั้นหนึ่งของกระบวนการสังเคราะห์ด้วยแสง เป็นการเปลี่ยนแปลงสารที่มีคาร์บอน 5 อะตอม โดยมีคาร์บอนไดออกไซด์เข้าร่วม กลายเป็นสารที่มีคาร์บอน 3 อะตอม แล้วสารที่มีคาร์บอน 3 อะตอมนี้จะเปลี่ยนกลับไปเป็นสารที่มีคาร์บอน 5 อะตอมใหม่อีกครั้งหนึ่ง เป็นวัฏจักรเช่นนี้เรื่ [พจนานุกรมศัพท์ สสวท.]

Result from Foreign Dictionaries (1 entries found)

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Photosynthesis \Pho`to*syn"the*sis\, n. (Plant Physiol.)
     The process of constructive metabolism in which green plants
     utilize the energy of sunlight to manufacture carbohydrates
     from carbon dioxide and water in the presence of chlorophyll.
     It was formerly called {assimilation}, but this is now
     commonly used as in animal physiology. --
     {Pho`to*syn*thet"ic}, a. -- {Pho`to*syn*thet"ic*al*ly}, adv.
     [Webster 1913 Suppl.]
     Note: In green plants water is absorbed by the roots and
           carried to the leaves by the xylem, and carbon dioxide
           is obtained from air that enters the leaves through the
           stomata and diffuses to the cells containing
           chlorophyll. The green pigment chlorophyll is uniquely
           capable of converting the active energy of light into a
           latent form that can be stored (in food) and used when
           The initial process in photosynthesis is the
           decomposition of water (H2O) into oxygen, which is
           released, and hydrogen; direct light is required for
           this process. The hydrogen and the carbon and oxygen of
           carbon dioxide (CO2) are then converted into a series
           of increasingly complex compounds that result finally
           in a stable organic compound, glucose (C6H12O6 ), and
           water. This phase of photosynthesis utilizes stored
           energy and therefore can proceed in the dark. The
           simplified equation used to represent this overall
           process is 6CO2+12H2O+energy=C6H12O6+6O2+6H2 O. In
           general, the results of this process are the reverse of
           those in respiration, in which carbohydrates are
           oxidized to release energy, with the production of
           carbon dioxide and water.
           The intermediary reactions before glucose is formed
           involve several enzymes, which react with the coenzyme
           ATP (see adenosine triphosphate ) to produce various
           molecules. Studies using radioactive carbon have
           indicated that among the intermediate products are
           three-carbon molecules from which acids and amino
           acids, as well as glucose, are derived.
     Note: The role of chlorophyll
           Chlorophyll contains a hydrophyllic head group and a
           hydrophobic tail region. A magnesium atom is held in
           the center of a cyclic, conjugated double bond
           porphyrin ring which is responsible for absorbing red
           light. (There also is an absorption band in the blue.
           Thus red and blue are absorbed and green passes
           through, giving plants a characteristic green color.)
           Light is absorbed by antenna chlorophyll molecules,
           then transferred to the reaction center chlorophylls.
           Some hundreds of antenna chlorophyll molecules transfer
           energy to a reaction center, with transfer times of
           about 10-10 sec from the edge of the unit to the
           The energy from light is used to pump H+ ions from the
           stroma into the thylakoid space and to reduce NADP+ to
           NADPH. Flow of H+ back into the stroma releases energy
           which is used to phosphorylate ADP to ATP. The
           chemiosmotic coupling is working here in a similar way
           to the mechanism of ATP generation used in
           Carbon Fixation Carbon fixation is catalyzed by
           ribulose bisphosphate carboxylase (RuBP carboxylase),
           the world's most abundent enzyme.
     { Calvin cycle} combines three carbon dioxide molecules into
        one molecule of three carbon glyceraldehyde 3-phosphate.
        Some plants, particularly many which live in hot, dry
        climates, have a mechanism for storing carbon dioxide by
        combining it with a three carbon molecule to form a four
        carbon molecule. This pathway is known as the C4 or
        Hatch-Slack pathway.
        [PJC] Phototaxis

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Calvin cycle




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