新合成的“栅栏式”卟啉及其金属配合物的磁圆二色性研究

研究了３种新合成的“栅栏式”卟啉ｍｅｓｏ－四（ａ，ａ，ａ，ａ－（２－呋喃甲酰氨基）苯基）卟啉（１）、ｍｅｓｏ－四（ａ，ａ，ａ，ａ－Ｏ－（２－噻吩甲酰氨基）苯基）卟啉（２）、ｍｅｓｏ－四（ａ，ａ，，ａ，ａ－Ｏ－（苯并－１５－冠－５－４′－甲酰氨基）苯基）卟啉（３）及其金属配合物：１－ＦｅＣｌ，２－Ｃｕ，３－Ｆｅｃｌ，３－Ｚｎ的磁圆二色谱（ＭＣＤ）利用Ｂｕｃｋｉｎｇｈａｍ－Ｓｔｅｐｈｅｎｓ方程讨论了分     

美国麻省大学的高分子研究

美国麻省大学的高分子研究胡汉杰国家自然科学基金委化学部，北京１０００８３何天白中国科学院高分子物理联合开放实验室，长春１３００２２杨小震中国科学院高分子物理联合开放实验室，北京１０００８０麻省大学（ＵｎｉｖｅｒｓｉｔｙｏｆＭａｓｓａｃｈｕｓｅｔｔｓ，...     

TNSTRUCTIONS TO CONTRIBUTORS

ＴＮＳＴＲＵＣＴＩＯＮＳＴＯＣＯＮＴＲＩＢＵＴＯＲＳ￥／／ｔ．ａｃｉｓａ＂ａ）ｎｔｈｌｙＪｏｉｎ＇ｎａｌ，ｃａｌｉｐｈｅｄ＇ＪｙｔｉｌｅＣｈｉｎｅｓｅｃｌｅｒｉｃａｌＳｏｃｉｅｔｙ．ａｓａｉｌＩｗｔｌｉｓｈｐｅｅｌｉｍｉｎａｒｙａｃｃｏｕｎｔｓｉｎｔ...     

ISI选用的中国期刊

ＡｃｔａＢｉｏｃｈｉｍｉｃａｅｔＢｉｏｐｈｙｓｉｃａＳｉｎｉｃａＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＳｔｒｕｃｔｕｒａｌＣｈｅｍｉｓｔｒｙＡｃｔａＢｏｔａｎｉｃａＳｉｎｉｃａＣｈｉｎｅｓｅＬａｗａｎｄＧｏｖｅｒｎｍｅｎｔＡｃｔａＣｈｉｍｉｃａＳｉｎｉｃａＣｈｉｎｅｓｅＬｉｔｅｒａｔｕｒｅＡｃｔａＧｅｏｌｏｇｉｃａＳｉｎｉｃａ(ＥｎｇｌｉｓｈＥｄｉｔｉｏｎ)ＣｈｉｎｅｓｅＭｅｄｉｃａｌＪｏｕｒｎａｌＡｃｔａＭａｔｈｅｒｍａｔｉｃａＳｉｎｉｃａ(ＮｅｗＳｅｒｉｅｓ)ＣｈｉｎｅｓｅＰｈｙｓｉｃｓＬｅｔｔｅｒｓ…     

一类活性极高的高分子表面活性剂

一类活性极高的高分子表面活性剂范仲勇，李娜，吴大诚（四川联合大学轻纺学院，成都，６１００６５）ＺｈａｏｈｕｉＳｕ，Ｓ．Ｌ．Ｈｓｕ（ＤｅｐａｒｔｍｅｎｔｏｆｐｏｌｙｍｅｒＳｃｉｅｎｃｅ＆Ｅｎｇｉｎｅｅｒｉｎｇ，ＵｎｉｖｅｒｓｉｔｙｏｆＭａｓｓａｃｈｕｓ...     

ISI选用的中国期刊

ＡｃｔａＢｉｏｃｈｉｍｉｃａｅｔＢｉｏｐｈｙｓｉｃａＳｉｎｉｃａＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＳｔｒｕｃｔｕｒａｌＣｈｅｍｉｓｔｒｙＡｃｔａＢｏｔａｎｉｃａＳｉｎｉｃａＣｈｉｎｅｓｅＬａｗａｎｄＧｏｖｅｒｎｍｅｎｔＡｃｔａＣｈｉｍｉｃａＳｉｎｉｃａＣｈｉｎｅｓｅＬｉｔｅｒａｔｕｒｅＡｃｔａＧｅｏｌｏｇｉｃａＳｉｎｉｃａ(ＥｎｇｌｉｓｈＥｄｉｔｉｏｎ)ＣｈｉｎｅｓｅＭｅｄｉｃａｌＪｏｕｒｎａｌＡｃｔａＭａｔｈｅｒｍａｔｉｃａＳｉｎｉｃａ(ＮｅｗＳｅｒｉｅｓ)ＣｈｉｎｅｓｅＰｈｙｓｉｃｓＬｅｔｔｅｒｓ…     

首届东亚高分子学术讨论会在沪举行

首届东亚高分子学术讨论会在沪举行受中国化学会委托，复旦大学和上海市科协承办的首届东亚高分子学术讨论会（Ｆｉｒｓｔ－Ｅａｓｔ－ＡｓｉａｎＰｏｌｙｍｅｒＣｏｎｆｅｒｅｎｃｅ，ＥＡＰＣ－１）于１０月１１日至１５日在复旦大学和上海兰生大酒店举行。来自日、韩、...     

A New Mathod for Conversion of Nitriles to Primary Alcohols

ＡＮｅｗＭａｔｈｏｄｆｏｒＣｏｎｖｅｒｓｉｏｎｏｆＮｉｔｒｉｌｅｓｔｏＰｒｉｍａｒｙＡｌｃｏｈｏｌｓ￥ＧｕａｎｇＤｉａｎＨＡＮ（ＩｎｓｔｉｔｕｔｅｏｆＭａｔｅｒｉａＭｅｄｉｃａ，ＰｅｋｉｎｇＵｎｉｏｎＭｅｄｉｃａｌＣｏｌｌｅｇｅ，ＣｈｉｎｅｓｅＡｃａ...     

1995年国际原子量的修订

１９９５年国际原子量的修订１９９５年８月，ＩＵＰＡＣ原子量与同位素丰度委员会在英国Ｇｕｉｌｄｆｏｒｄ会议上决定修订五项原子量如下：其中铕和铈两项原子量的新标准，是我国的贡献。铕的文献：张青莲、钱秋宇、赵墨田、王军，Ｉｎｔ．Ｊ．ＭａｓｓＳｐｅｃ－ｔｒｏ...     

美国吐伦大学的共同仪器设施中心管理模式的介绍

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STUDIES ON THE RED AND BLUE FORMS OF THE PIGMENT OF BLEPHARISMA*

Abstract— –The intracellular pigment of the ciliate protozoan Blepharisma in the presence of oxygen sensitizes the cells to bright visible light (2700 foot candles (fc)). Illumination of the cells with dim visible light (200 fc) changes the color of the pigment to blue-gray; such cells are no longer sensitive to bright visible light. The pigment which exists in granules can be extruded by cold treatment and is slowly regenerated. The suspension of red cells, the extruded pigment from them and an ethanol extract of the pigment all have very similar absorption spectra. Illumination of the red pigment in ethanol converts it to the blue form of the pigment but only if oxygen is present, indicating a photooxidation. The pigment can be oxidized in darkness to the blue form by ozonation. A suspension of blue cells, the extruded pigment from them and an ethanol extract from them, all have similar absorption spectra. The pigments in red and blue form are very similar spectrophotometrically and in solubility in three species of Blepharisma studies: B. americanum, B. intermedium and B. japonicum. The purified pigment has strong absorption in the far (200–300 nm) ultraviolet (u.v.) and may serve as a screen against damaging U.V. radiation, especially as Blepharisma shows poor photoreactivation.     

PRESUMED PHOTORECEPTOR PROTEIN AND ULTRASTRUCI'URE OF THE PHOTORECEPTOR ORGANELLE IN THE CILIATED PROTOZOAN, Blepharisma

Abstract-The red pigment granule of Belpharisma japonicum is believed to be a photoreceptor organelle mediating photodispersal. Freeze-fracture and thin section electron microscopy revealed that the pigment granules contained a honeycomb-like structure constructed of folded membranes. In the fracture face of the honeycomb-like structure, small membrane particles were observed, which might correspond to pigment—protein complexes. The pigment granules were isolated and detergent-solubilized. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) showed that the pigment granules mainly contained a 200 kDa membrane protein. The complex of red pigment and 200 kDa protein was isolated by gel-filtration chromatography of the detergent-solubilized components, and the protein was subjected to SDS-PAGE and amino acid analysis. The 200 kDa protein could not be dissociated into subunits by 2-mercaptoethanol, indicating that the protein is composed of a single polypeptide chain. Hydrophobic amino acids contained in the 200 kDa protein were not dominant, suggesting that only partial domains may extend across the membrane of the honeycomb-like structure.     

Characterisation of paint layers in Chinese archaelogical relics by pyrolysis-GC-MS

Summary A few samples of polychrome Chinese archaeological objects of art have undergone analytical pyrolysis coupled with GC-MS to evaluated the possibility of contemporary characterization of the pigments as well as the organic media used. The red pigment cinnabar (HgS) is easily media used. The red pigment cinnabar (HgS) is easily detected, whereas in the case of organic components positive results are only found where the matrices are resistant to archaeological environmental conditions.     

THE PHOTORECEPTORS INVOLVED IN ANTHOCYANIN SYNTHESIS

Abstract— Experiments with irradiation sequences where red precedes far-red lead to the conclusion that, in turnip, phytochrome is the only pigment mediating anthocyanin synthesis in red and far-red. Results from experiments where far-red precedes red, however, suggest that more than one reaction is involved. A possible interpretation is that the 'high-energy' reaction in far-red and the low energy red/far-red reversible reaction are mediated by two different forms of phytochrome.
The 'high-energy' reaction in blue light does not appear to depend on phytochrome.     

Spectroscopic Characterization of the Architectural Painting from the Cizhong Catholic Church of Yunnan Province,China

The Cizhong Catholic Church, which incorporates local Chinese architectural styles and artistic motifs, witnessed the transmission of Catholicism in Yunnan Province in the late Qing Dynasty. The pigments of the paintings from the church were identified by micro-Raman Spectroscopy, micro X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The analyses indicated that chromogenic substances of the white pigment was calcite, that of the black pigment was carbon black, that of the red pigment was hematite, that of the blue pigment was artificial ultramarine, and that of the green pigment was emerald green. The study also revealed that artificial ultramarine and emerald green were probably imported or brought by French missionaries from Europe. In addition, emerald green was identified to have partially degraded into cornwallite.     

ROLE OF HYDROXYL-BEARING AMINO ACIDS IN DIFFERENTIALLY TUNING THE ABSORPTION SPECTRA OF THE HUMAN RED AND GREEN CONE PIGMENTS

The human red and green cone pigments differ at either 15 or 16 amino acids, depending upon which polymorphic variants are compared. Seven of these amino acid differences involve the introduction or removal of a hydroxyl group. One of these differences, a substitution of alanine for senne at position 80, was found previously to produce a 5 nm blue shift. To determine the role of the remaining six hydroxyl group differences in tuning the absorption spectra of the human red and green pigments, we have studied six site-directed mutants in which single amino acids from the green pigment have been substituted for the corresponding residues in the red pigment. Blue shifts of 7 and 14 nm were observed upon substitution of phenylalanine for tyrosine at position 277 and alanine for threonine at position 285, respectively. Single substitutions at positions 65, 230, 233, and 309 produced spectral shifts of 1 nm or less. These data are in good agreement with a model based upon sequence comparisons among primate pigments and with the properties of site-directed mutants of bovine rhodopsin. Nonadditive effects observed in comparing the absorption spectra of red-green hybrid pigments remain to be explained.     

PHOTOTRANSFORMATIONS OF PHYTOCHROME: THE CHARACTERIZATION OF LUMI-F AND META-Fa

Abstract— …Phototransformations of the red/far red reversible plant pigment phytochrome involve several intermediates. At 77K, lumi-F , the initial product of phototransformation of the far red absorbing form P _fr and some of its relaxation products are shown to undergo further phototransformations. Lumi-F has an absorption maximum in the region 690–730nm. The product, giving rise to a maximum in the difference spectra at 650nm, formerly thought to be lumi-F , is now believed to represent one of its relaxation products. The nature of the reactions connecting these various intermediates are discussed.     

pH对玫瑰红色素紫外和荧光光谱的影响

玫瑰是蔷薇科蔷薇属落叶丛生灌木,品种繁多,其花色、香、形具美,有极高的观赏和经济价值,我国玫瑰资源丰富,古代人们就将玫瑰用于染色、食品和药用等领域,现在玫瑰主要用于商品花卉和提取玫瑰精油.     

Preparation of Cr-Doped YAlO_3 Red Ceramic Pigment and the Coloration Mechanism

The red ceramic pigment is widely used in industrial production, but the pigments with pure color and bright red performance are rare. Therefore, it is important to study and develop new red ceramic pigment with perfect color performance. This paper reports the preparation of Cr-doped YAlO_3 red ceramic pigment rendering by sol-gel method with high temperature resistance, good color and proposed color mechanism. The prepared samples were characterized by XRD, SEM, EDS and UV-vis, and the effects of Cr on the crystal structure, color rendering properties and color mechanism were discussed. The results showed that the optimum concentration of coloring agent(Cr) in Cr:YAlO_3 red ceramic pigment was 3 at.%. The main color mechanism was also discussed. Compared with the solid phase sintering and precipitation methods for the synthesis of red ceramic pigment, the sol-gel method possessed obvious advantages, such as perfect mixing of the raw materials, uniform dispersion of doping ions and the pure color.     

吸附树脂对紫背天葵的水溶性色素精制研究

研究吸附树脂吸附精制紫背天葵红色素的方法和工艺。以吸附量、解吸量为指标,在pH=7时吸附,确定出S-8极性树脂和盐酸-乙醇溶液为最佳吸附剂和解吸剂。正交动态吸附和解吸实验结果表明,当原花液浓度3g/L,吸附流速3ml/min,树脂床层径高比1:1时,树脂对色素的吸附量最大;以盐酸-乙醇为解吸剂,解吸液用量30ml/g,解吸流速是1/5BV。经树脂吸附精制后的色素色价是未精制色素的3.74倍。