The radical S-adenosylmethionine (SAM) superfamily is currently the largest known enzyme family. These enzymes reductively cleave SAM to produce a highly reactive 5′-deoxyadenosyl (dAdo) radical, which abstracts a hydrogenfrom the substrate and initiates diverse reactions. The canonic dAdo radical-mediated hydrogenabstraction can be changed to radical addition reactions by using olefin-containing
自由基S-腺苷甲硫氨酸(SAM)超家族目前是最大的已知酶家族。这些酶还原性裂解SAM产生高反应性的5'-脱氧腺苷(dAdo)自由基,该自由基从底物中提取氢并引发各种反应。通过使用含烯烃的底物类似物,可以将经典的dAdo自由基介导的氢提取反应更改为自由基加成反应,从而导致腺苷化反应。在这里,我们报告调查由四个自由基SAM L -Tyr裂解酶(RSTLs)催化的腺苷化反应,包括HydG,FbiC和来自不同生物体的两个ThiH酶。我们显示RSTL具有多种底物特异性,以及来自大肠杆菌的ThiH对测试的基材表现出最高的基材耐受性。我们还显示,来自Clostridium berjerinckii的ThiH不会作用于4-氨基-L-苯丙氨酸,但会催化相应的含烯烃类似物的腺苷化,这表明腺苷化可能比经典的自由基SAM反应更容易发生。我们的研究突出了自由基SAM酶的显着催化混杂性,以及使用这些酶合成含核苷酸化合物的潜力。
Planographic printing plate precursor
申请人:Fuji Photo Film Co., Ltd.
公开号:EP1162063A2
公开(公告)日:2001-12-12
A positive planographic printing plate which has high sensitivity, limited reduction in sensitivity over time and high stability over time. The positive planographic printing plate has a light-sensitive layer formed on a support. The light-sensitive layer includes a light-sensitive image-forming material and a material which absorbs light and generates heat. The light-sensitive image-forming material contains a novolac resin having a xylenol monomer. It is preferable that, if a proportion of the xylenol-containing novolac resin in alkali-soluble resin that forms the light-sensitive layer is Y% by weight and a content of the xylenol monomer in the novolac resin is X% by weight, X × Y is 500 or more (X × Y ≧ 500).
一种具有高灵敏度、灵敏度随时间降低的程度有限和高稳定性的正片平版印刷板。正片平版印刷版有一个感光层,形成于支撑物上。光敏层包括一种光敏图像形成材料和一种吸收光并产生热量的材料。光敏成像材料包含一种具有二甲苯醇单体的酚醛树脂。如果形成光敏层的碱溶性树脂中含二甲苯基酚的酚醛树脂的重量比例为 Y%,而酚醛树脂中二甲苯基酚单体的重量比例为 X%,则 X × Y 最好为 500 或更多(X × Y ≧ 500)。
Hydrophilic film, and planographic printing material, stain-preventative member and defogging member using the same
申请人:FUJI PHOTO FILM CO., LTD.
公开号:EP1693410A2
公开(公告)日:2006-08-23
The invention provides a hydrophilic film obtained by curing, by at least one energy source selected from heat and light, a composition comprising a compound that has, in a molecule thereof, two or more ring structures selected from the group consisting of five-membered structures and six-membered structures, wherein the ring structures have a hydrophilic group. The invention further provides a planographic printing material having at least a substrate and the hydrophilic film formed on the substrate. The invention further provides a method for forming a planographic printing plate including at least forming an ink receiving portion on a planographic printing material by applying a hydrophobic material by an ink jet recording process.
PHOTOSENSITIVE RESIN COMPOSITION, CURED FILM, INDUCTOR AND ANTENNA
申请人:FUJIFILM Corporation
公开号:EP3950753A1
公开(公告)日:2022-02-09
The first object of the present invention is to provide a photosensitive resin composition with which a cured film that exhibits a high magnetic permeability real part µ' and a low magnetic loss tan δ in the high frequency region can be formed. The second object of the present invention is to provide a cured film that is formed by using the photosensitive resin composition and to provide an inductor and an antenna that contain the cured film.
The photosensitive resin composition of the present invention contains a resin that has an ethylenic unsaturated group and a graft chain, or a resin that has a compound having an ethylenic unsaturated group and has a graft chain; an iron-containing particle of which an iron atom content is 10% by mass or more; and a polymerization initiator.
Carboxy-functionalized polyphenylene ethers and blends containing them
申请人:——
公开号:US20010034430A1
公开(公告)日:2001-10-25
Carboxy-functionalized polyphenylene ethers containing structural units with a carboxyalkyl group in the 2-position are prepared by redistribution of a polyphenylene ether with a 2-carboxyalkylphenol such as 2-(3-carboxypropyl)phenol (melilotic acid), or by oxidative coupling of a suitable phenol with such a 2-carboxyalkylphenol. The products form compatibilizing copolymers with polymers containing carboxylic acid-reactive functional groups, such as polyesters, polyamides and epoxy resins.