starjing99
FITC (fluorescein isothiocyanate, FITC) pure yellow or orange yellow crystalline powder, soluble in water and alcohol solvent. There are two isomers, one isomer type Ⅰ efficiency, stability and protein binding, etc. are better. FITC molecular weight of 389.4, the maximum absorption wavelength for the 490 ~ 495nm, the maximum emission wavelength for the 520 ~ 530nm, a bright yellow-green fluorescence. FITC in the dark cold can be stored dry for many years, is currently the most widely used fluorescein. Its main advantage is the human eye is more sensitive to yellow-green, usually biopsy samples less than the green fluorescent red.FITC labeled with various antibodies], peptide, polysaccharide] and other substances have been used in a wide variety of biological research.FITC, there are two isomers, one isomer A in terms of efficiency, stability, and protein binding capacity, etc. are better in the cold dark, dry place can be stored for many years, the other as a result of the human eye is more sensitive to yellow-green, biopsy specimens are usually in the red than green fluorescence, FITC therefore become the most widely used fluorescein. FITC labeled with a variety of antibodies, peptides, polysaccharides and other substances has been widely used in a variety of biological research.In recent years the study of drug carrier, and is often the use of fluorescent substances. The introduction of the fluorescent material of drug delivery methods are: (1) by chemical method combined with fluorescent material so that coupled with the polymer and then coupling of the polymer after the drug-loaded particles prepared or coupled directly to the fluorescent material in the preparation of good the surface of the particles. (2) directly to the fluorescent marker substance or package containing the drugs into nanoparticles.
水蓝色的风铃
The isothiocyanic acid fluorescein (fluorescein isothiocyanate, FITC) the sterling for the yellow or the orange yellow crystallization powder, easy to dissolve in the water and the ethyl alcohol resolver. Two kind of isomers, isomerⅠIn aspects and so on efficiency, stability and protein binding force is finer. The FITC molecular weight is 389.4, the biggest absorption light wave length is 490~495nm, the biggest emitting light wave length is 520~530nm, presents the bright Huang Lvse fluorescence. FITC in cold dark dry place may preserve many years, applies the most widespread fluorescein at present. Its principal advantage is the human eye is more sensitive to Huang Lvse, usually in section preparation's green fluorescence is short red. Each kind of immune body which marks with FITC], the multi-peptides, the polysaccharide] and so on materials have widely used in each living thing research. FITC has two kind of isometry bodies, isomer A in aspects and so on efficiency, stability, with protein combining capacity is better, in cold dark, dry place may preserve many years, because moreover the human eye is more sensitive to Huang Lvse, usually in section preparation's green fluorescence is short in red, therefore FITC becomes uses the most widespread fluorescein. Each kind of immune body which marks with FITC, the multi-peptides, materials and so on polysaccharide have widely used in each living thing research. in recent years regarding medicine carrier research, also often uses the fluorescent substances. Includes the fluorescent substances introduction medicine carrier's method: (1) causes the fluorescent substances and the polymer pair through chemical combination's method is joint, unites the pair the polymer prepares after again Cheng Zaiyao the particle or the fluorescent substances pair unites directly is preparing the good particle surface. (2) directly fluorescent substances or mark medicine Bao Zaijin nano particles.
拽拽小蘑菇
苏丹红英文名就叫Sudan,有:苏丹红1号(Sudan I)、苏丹红2号(Sudan II)、苏丹红3号(Sudan III)、苏丹红4号(Sudan IV)、苏丹橙B(Sudan Orange B)、苏丹红7B(Sudan Red 7B)等。
Lisa要去旅行
在网上查到的有:Sudan,Sudan red,Oil-soluble但我觉得Oil-soluble 是正确的苏丹红【中文名称】油溶黄；1-苯基偶氮-2-萘酚；苏丹黄；C.I.溶剂黄14；C.I.12055【英文名称】Oil-soluble 【相对分子量或原子量】248.29【熔点（℃）】134【性状】黄色粉末。【溶解情况】不溶于水，微溶于乙醇，易溶于油脂、矿物油、丙酮和苯。乙醇溶液呈紫红色，在浓硫酸中呈品红色，稀释后成橙色沉淀。【用途】用作家具漆、鞋油、地板蜡、汽车蜡和油脂的着色。此外，也用于礼花、焰火及溶剂的着色。【制备或来源】以苯胺为原料，在盐酸中与亚硝酸钠进行重氮化反应，生成重氮盐，再与2-萘酚进行偶和而得。【其他】最大吸收波长416（478）nm。本品色泽鲜艳，耐酸耐碱性强。为了改善食物的色、香味和保存期不致腐败，常给食品添加一些化学物质或防腐剂。这些食品添加剂必须对人体无害。在种类繁多的食品添加剂中，如使用不当，很可能含有一些致癌物质。例如，过去曾用作人造奶油着色的“奶油黄“等，其它用途的人工合成添加剂，玫瑰红-B、橙黄-SS、碱性槐黄等，在动物身上都能诱发癌症，肯定不能用于人类饮酒中。美国市场上一度出现?quot;甜精“甜味剂，都因为发现对动物有致癌作用而被禁用。糖精是否致癌还有争论，但国内外都已规定食物中糖精的最高用量。目前，我们食用的人工合成色素有胭脂红、苋芋红、柠檬黄、靛蓝和苏丹黄等五种。这些色素对人体都有不同程度的损害。在食用色素中，天然色素一般认为是无毒的，而人工合成的色素绝大多数品种不仅本身有毒，而且还夹杂着重金属等剧毒物质。其毒性主要有一般毒性、致泻性和致癌性
优质英语培训问答知识库
