We investigated constituent of triterpenoid saponins ofAlbizzia, two new compounds together with two known compounds were isolated from Albizzia julibrissin Durazz. by using column chromatography (macroreticular resin, silica gel, Sephadex gel, reverse phase silica gel),preparative HPLC methods et al.On the basis of spectroscopic analysis, including IR,ESI-MS,~1H-NMR,~(13)C-NMR,HMBC,HMQC,~1H-~1HCOSY and chemical methods, the structure of two new compounds were identified as 3 - O -[β-D-xylopyranosyl(1→2)-β-D-fucopyranosyl (1→6)-β- D -2- deoxy - 2 - acetoamidoglucopyranosyl] -21-O-[(6S)-2- trans- 2,6-dimethyl - 6 - O-β- D - quinovopyranosyl -2,7- octadienoyl] - acacic acid- 28 - O-β-D-glucopyranosyl(1→3)[α-L-arabinofuranosyl(1→4)]-α-L-rhamnopyranosyl(1→2)-β-D-glucopyranoside acacic acid 3- O -β- D- glucopyranosy(1→3)-β- D- fucopyranosl(1→6) [β-D- xylopyranosyl (1→2)]-β-D-glucopyranoside ;two known compounds were acacic acid lactone 3- O -β-D- xylopyranosyl-(1→2)-β-D-fucopyranosl (1→6)- 2-deoxy -2 -acetoamido -β-D- glucopyranoside ; acacic acid lactone 3- O-β-D-xylopyranosyl(1→2)-α-L- arabinopyranosl (1→6)- 2- deoxy - 2- acetoamido -β-D-glucopyranoside . The study lays chemical foundation and chemical reference substance for enhancing quality standard of Albizzia julibrissin Durazz.

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The characteristics of 4-nitrophenol's λmax and εmax supply evidence that nitro is a better auxochrome for phenol derivatives.

對硝基酚的λmax和εmax的特性研究表明—NO2是酚類化合物較好的助色基又黄又湿的视频。

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尤其省、部優(yōu)產(chǎn)品硫化紅棕 B3R 亚洲欧美中文日韩另娄变态；硫化蘭 BR508亚洲免费黄色三级录像；硫化蘭 BRN ；雙倍硫化黑 BRN 在线直接看免费黄色网站、 BN 欧美视频天堂在线观看；大紅色基 RC ；棗紅色基 GBC 等品種倍受國內外用戶歡迎啊疼轻点视频。

Three N-pivot lariat ethers with picrylamino group as side arms have been prepared, and the selective coloration of above chromogenic ethers for alkalic metal salts and amines have been studied conveniently by UV-Vis spectra.

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Result Under the pretreatment conditions, the content of acetone extractives transformed. The hydroxyl and carboxyl, belonging to auxochromic groups, were oxidized into the carbonyl and ester groups. Also, there were plenty of auxochromic groups and chromophoric groups in the acetone extractives of silver chain.

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The paper carries on qualitative analysis to the acetone extractives before and after discoloring, shows the main components of the extractives and then takes comparison. The results shows :①The hydroxyl is oxidized and then shifted to the carbonyl,carboxyl, ester and ketone groups during inducing discoloration under the pretreatment conditions,which makes the wood color deep;② There are plenty of auxochromic groups in the acetone extractives of silver chain, the interaction between the auxochromic groups and the chromophoric groups makes the wood color deep.

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To study the bioactive components from water soluble extract of the Chinese eaglewood, various column chromatography of Chinese eaglewood led to the isolation of ten compounds. Their structures were elucidated as 2,3-bis(3-hydroxyphenyl)- propan-1-ol (1), [(2R,3R)-3-(4-amino-3,5-dimethoxyphenyl)oxiran-2-yl]methanol (2), 8-chloro-4'- methoxy-5,6,7,3'-tetrahydroxy-2-(2-phenethyl)-5,6,7,8-tetrahydrochromone (3), 4'-methoxy-5,6,7,3'-tetrahydroxy-2--5,6,7,8-tetrahydrochromone (4), the isomer of 4 (5), 4'-methoxy-5,6,7,8-tetrahydroxy-2-(3'-hydroxyphenethyl)-5,6,7,8- tetrahydrochromenone (6), 4'-methoxyisoagarotetrol (7), 6-hydroxy-2-(2-hydroxy-2- phenethyl)-chromone (8), 6-hydroxy-2-(2-phenethyl)-chromone (9), 6-hydroxy-2-(4'- hydroxy-2-phenethyl)-chromone (10), and Guaiacylacetone (11) by means of spectral analysis and comparison with references.

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PhyA is the photoreceptor of far-red light perception in Arabidopsis and mediates the inhibition of the hypocotyl elongation under FR light. phyA has two domains : the N-terminal photosensory domain with a chromophore-binding site and the C-terminal domain which contains signaling motifs such as a kinase domain.

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auxochrome：助色基;助色團

auxin 生長素 | auxochrome 助色基;助色團 | auxoplosive group 助爆基;助爆團

chromophore：色基

-OH)不是發(fā)色基(chromophore)酚(phenol)於堿性下會發(fā)生bathochromic shift、hyperchromic shift當分子受紫外光和可視光波段之輻射能照射時會引起電子能(electronic energy)轉移紅外光之指紋區(qū)(fingerprint region)之波長范圍是8-15um=1200-600cm-1Nephelometry之測量與透光度(transmittance)無關火焰發(fā)散分光光譜儀(flame e

chromophore group：發(fā)色基團

難染性 chromophobe | 發(fā)色基團 chromophore group | 發(fā)色團理論 chromophore theory

chromophore; chromophoric group：發(fā)色基

"chromophobe","疏色性" | "chromophore; chromophoric group","發(fā)色基" | "chromophyll","葉色素"

Color Key：色基

截止期 closing date | 色基 color key | 分色 color separation

色基 color key 分色：color separation

字計算式 charactr-count method | 色基 color key 分色 color separation | 連續(xù)調 continuous tones

color radicle：色基,發(fā)色團

color picture tube 彩色顯像管 | color radicle 色基,發(fā)色團 | color radioisotope scanner 彩色放射性同位素掃描儀

chromophoric group：發(fā)色基

chromophore 發(fā)色基 | chromophoric group 發(fā)色基 | chromophotometer 比色計

chromophoric electrons：色基電子

"chromophor","色基" | "chromophoric electrons","色基電子" | "chromosome","染色體"

color base：色基,發(fā)色母體

色相帶 color band | 色基,發(fā)色母體 color base | 滲色 color bleeding