- Overview
- Data/Specifications
- Literature/Support
- How To Use
- Related Products
Overview
Type III collagen is the second most abundant collagen in tissues and is found most commonly in tissues exhibiting elastic properties such as skin, lungs, intestinal walls and walls of blood vessels. It is a homotrimer comprised of three alpha-1 chains and resembles other fibrillar collagens in structure and function. It is synthesized as procollagen, similary to collagen I, but the N-terminal propeptide remains attached in the mature fibrillar type III form.
Mutations of type III collagen causes Ehlers-Danlos syndrome, EDS IV, which affect arteries, internal organs, joints and skin, and may cause sudden death when the large arteries rupture.
Symbols/Related Terms:
- COL3A1
- Collagen type III, alpha 1
- Collagen III, alpha-1 polypeptide
- collagen, type III, alpha 1 (Ehlers-Danlos syndrome type IV, autosomal dominant)
- EDS4A
Data/Specifications
Description: Purified Bovine Collagen Type III (Atelocollagen) from bovine placenta
Form: Lyophilized, salt free, 10 mg/ vial
Sterility: Passed sterility test for bacteria and fungi
Source: Bovine placenta
Purity: Bovine Collagen Type III (Atelocollagen) > 90% / Bovine Collagen Type I (Atelocollagen) < 10%
Purification: Partial pepsin digestion in acidic conditions and differential salt precipitation.
Reconstitution: Dissolve in 10-50 mM acetic acid. Suspension should be shaken or stirred for several hours or overnight between 2-8°C. Material is dissolved when it appears homogeneous, with no schlieren pattern (light refraction due to differing protein concentrations in the suspension). Recommended concentration 1-5 mg/ml.
Storage: Bovine Collagen Type III (Atelocollagen) dissolved in acetic acid is stable at 4°C for 1 month. Lyophilized collagen long term storage (2 years) at -20°C or lower.
Application: Coating material for cell culture studies or 3D gel formation.
Literature/Support
Bovine Collagen Type III (Atelocollagen) Insert (PDF)
Note: inserts are for review only. Please refer to the insert shipped with your product to ensure the most up-to-date revision is being used.
How To Use
Dissolve in 10-50 mM acetic acid. Suspension should be shaken or stirred for several hours or overnight between 2-8°C. Material is dissolved when it appears homogeneous, with no schlieren pattern (light refraction due to differing protein concentrations in the suspension). Recommended concentration 1-5 mg/ml.
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纯水机,跟净水机或者净水器的区别是需要用电(大多数),有一个真空储水罐,纯水机包含了净水机或者净水器的功能和使用材质,过滤更高可达到万分之一微米,因为最重要的是它采用了RO反渗透技术,因为过滤更精细,所以一般的水压是不能顺畅通过的,所以需要用电,电要带动机器本身佩戴的增压泵来给原水打压才能通过。
事实上很多细菌病毒异色异味也只有纯水机能完全的过滤掉。
这只是一些最基本的常识。希望对楼主有帮助吧,本人专业从事净水行业多年,也可以看本人以往的知道回答!
总体上来说,在纯水仪器上,进口品牌中密理博、pall、威立雅都算是国内科研单位采购比较多的,当然,售价也较高,一般为国产品牌的3-5倍,除非硬性规定,或者需要用进口高端设备来提升实验室形象,否则,不建议花冤枉钱,因为目前国内很多纯水品牌在技术上都已经追赶甚至超越了进口品牌。
此外,很多人不了解的是,许多欧美品牌的纯水机,虽然技术成熟,但是都是基于国外的水质而研发,而我国自来水水质事实上比欧美国家的低(欧美国家的自来水可直接饮用),因为存在进口品牌的水机在我国水土不服的现象,甚至其前端处理仍需搭配国产设备,只是很多客户并不知晓,尤其是中央供水系统更是如此。这一点需要注意。
国产纯水品牌的话,鱼龙混杂,这里仅仅介绍几个知名度较高,市场做得比较大的,并简单分析对比:
1、锐思捷:在技术上比较成熟,水机的品质和进口品牌做过很多对比和验证,基本上也足以媲美进口品牌了,产品线包含小型机(10-60L)和大型中央供水系统(200L-5T),价格在中高位置;
2、和泰:主做小型机,中央供水系统较少,价格由近万至7万左右,小型机产品线丰富,在市场营销方面下的力度非常大;
3、力康:也算是中高端国产纯水仪器,同时也做其他实验室设备;
此外还有优普、易普易达等区域性品牌。
净水器使用砂滤、活性炭、超滤等技术,能在一定程度上净化水源。能去除泥沙、铁锈,但无法彻底去除水垢、细菌、病毒,属于初级过滤。使用KDF技术的净水器,能去除细菌、病毒,部分去除重金属,但无法去除水垢。
软水机基本都是采用离子交换技术,用钠型阳离子置换水中的钙镁离子(水碱),彻底去除水垢,可以给生活带来很多好处。
纯水机采用反渗透膜过滤技术,核心是微孔过滤,只有水分子和比水分子小的矿物质能通过膜并保留下来供饮用;细菌、病毒、水垢、污染物均不能通过膜,成为浓缩水排出;从而达到纯净水的标准。
我问弱了,请大家不要嘲笑我。
用DDBJ---350型便携式电导率仪测试,DJS-1C型铂黑电极,测的结果总是达不到要求,与纯水器上所显示的便高很多。
请问是测的方法不对或是所用的仪器不对?
你们所用的分析用水是怎么检测的?
多谢了!
急呀!

