Results 241 to 250 of about 6,174 (259)
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The cinnamate/monolignol pathway
Phytochemistry Reviews, 2009The cinnamate/monolignol pathway provides precursors for various phenylpropanoid compounds including lignins, lignans, neolignans, p-hydroxycinnamate esters, coumarins, suberins, flavonoids, stilbenes and so on. Therefore, the pathway plays the central role in plant secondary metabolism.
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The Photosensitivity of Polyvinyl Cinnamate
Nippon kagaku zassi, 1966ポリケイ皮酸ビニルの感光性をその紫外吸収スペクトルから考察した。同時にケイ皮酸の光二量化と比較した。PVAフィルムに混合されたケイ皮酸の光照射により,ケイ皮酸の273mμの吸収帯は短波長266mμに移動し,その強度は減少することが認められた。短波長への移動はtrans-cis異性によるもので,吸収帯の消失は二量体生成にともなうα,β不飽和二重結合の消失に基づくものである。ポリケイ皮酸ビニルの場合も照射前277mμにある吸収は照射により消失したが,短波長移動は起らなかった。種々の増感剤を添加した樹脂に分光増感域の光を照射しても,樹脂固有の変化と同一であった。さらに吸収帯の消失を利用して,未変化ケイ皮酸基を比色定量して量子収率を求めたところ,量子収率φは濃度依存性を有し,ケイ皮酸基濃度C(初期濃度C0 ...
Shinichi Kikuchi, Kenichiro Nakamura
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High-yield synthesis of bioactive ethyl cinnamate by enzymatic esterification of cinnamic acid
Food Chemistry, 2016In this paper, Lipozyme TLIM-catalyzed synthesis of ethyl cinnamate through esterification of cinnamic acid with ethanol was studied. In order to increase the yield of ethyl cinnamate, several media, including acetone, isooctane, DMSO and solvent-free medium, were investigated in this reaction.
Na Chen +4 more
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Fragrance material review on methyl cinnamate
Food and Chemical Toxicology, 2007A toxicologic and dermatologic review of methyl cinnamate when used as a fragrance ingredient is presented.
J F Lalko +5 more
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Metabolism of Cinnamic Acid and Hydroxy-Cinnamic Acids by Lactobacillus pastorianus var. quinicus
Nature, 1959PREVIOUS work has shown that caffeic acid, 3 : 4 dihydroxy-cinnamic acid is metabolized by Lactobacillus pastorianus var. quinicus 1,2 with the formation of dihydrocaffeic acid and ethyl catechol3. A pure culture of this organism was inoculated into a basal medium1 with the addition of 0.025 per cent cinnamic acid and 0.25 per cent fructose.
J. G. Carr, G. C. Whiting
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A comparative vibrational and NMR study of cis-cinnamic acid polymorphs and trans-cinnamic acid
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2001The IR and Raman spectra of the two polymorphic forms (58 degree- and 68 degree-forms) of cis-cinnamic acid were measured, and the spectral differences discussed on the basis of the crystal structures of the two forms. The IR bands related to the COOH group differ in the frequencies and band shape, reflecting differences in the hydrogen bonding between
Kazuhiko Hanai +4 more
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The Dimerization of Cinnamic Acid Derivatives
ChemInform, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
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Study of the mesomorphism of benzoates and cinnamates
Molecular Crystals and Liquid Crystals, 2016ABSTRACTTwo ester homologous series of carboxy (-COO-) and ethylene-carboxy (-CH=CH-COO-) mesogens, viz. α-4-[4’-n-alkoxybenzoyloxy] phenyl β-4’’-methoxy benzoyl ethylenes (1) and α-4-[4’-n-alkoxy cinnamoyloxy phenyl β-4’’-methoxy benzoyl ethylenes (2)] are discussed. Series (1) and (2) differ at their central linking group.
R. B. Patel +3 more
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Contact allergy to cinnamic aldehyde and cinnamic alcohol in Oléophytal®
Contact Dermatitis, 1995J. Bazex, F. El Sayed, F. Manzur
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Photoreaction of Cholesteryl Cinnamate in Multilayers
1980The designed arrangement of molecules is a valuable tool for research in the molecular sciences. This will enable to construct organized molecular system, which is capable of realizing entirely new functional potentials when the constituents are properly arranged.
M. Suzuki, Y. Tanaka
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