
5 alpha-Androstane-3 alpha 17 beta-diol Glucuronide 3 alpha-Diol G ELISA
5 alpha-Androstane-3 alpha 17 beta-diol Glucuronide 3 alpha-Diol G ELISA is for Research Use Only
Size: 1×96 wells
Sensitivity: 0.1 ng/mL
Standard Range: 0.25–50 ng/mL
Incubation Time: 45 minutes
Sample Type: Serum
Sample Size: 50 µl
Controls Included
Assay Principle
The principle of the following enzyme immunoassay test follows the typical competitive binding scenario. Competition occurs between an unlabelled antigen (present in standards, controls and patient samples) and an enzyme-labelled antigen (conjugate) for a limited number of antibody binding sites on the microplate. The washing and decanting procedures remove unbound materials. After the washing step, the enzyme substrate is added. The enzymatic reaction is terminated by addition of the stopping solution. The absorbance is measured on a microtiter plate reader. The intensity of the colour formed is inversely proportional to the concentration of 3α-Diol G in the sample. A set of standards is used to plot a standard curve from which the amount of 3α-Diol G in patient samples and controls can be directly read.
SPECIMEN COLLECTION AND STORAGE
Approximately 0.2 mL of serum is required per duplicate determination. Collect 4–5 mL of blood into an appropriately labelled tube and allow it to clot. Centrifuge and carefully remove the serum layer. Store at 4°C for up to 24 hours or at -10°C or lower if the analyses are to be done at a later date. Consider all human specimens as possible biohazardous materials and take appropriate precautions when handling.
POTENTIAL BIOHAZARDOUS MATERIAL
Human serum that may be used in the preparation of the standards and controls has been tested and found to be nonreactive for Hepatitis B surface antigen and has also been tested for the presence of antibodies to HCV and Human Immunodeficiency Virus (HIV) and found to be negative. No test method however, can offer complete assurance that HIV, HCV and Hepatitis B virus or any infectious agents are absent. The reagents should be considered a potential biohazard and handled with the same precautions as applied to any blood specimen.
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大家好,请教一个问题,我们的冻干机想配置过氧化氢系统灭菌,但听说普通的316L不锈钢会被过氧化氢腐蚀,必须对冻干机进行耐腐蚀处理,请问是这样吗?我们的冻干机是进口的,如果返回原厂做耐腐蚀处理的话,那成本以及时间都耗费过大。
食品方面应用:
1、冷干食品最大限度地保留了新鲜食品的营养成分及色、香、味。冻干食品的干燥是在低温和真空状态下进行的,使一些热敏性和极易氧化物质的损失大大减少,最大限度地保留了食品中的各种营养成分。
2、冻干食品不失原有食品的骨架结构,保持了食品原有的形态。
3、复水性能好,更接近新鲜食品品质
4、无一般干燥方法带来的表面硬化问题。
5、易于储藏、运输。
制药方面应用:
1、对热敏感物质去除水分。
2、保证物料活性、有效医用价值成分。
重复之前的冻干工艺,批量一样,冻干后样品水分逐渐升高是什么原因?是冻干机哪里的问题呢?用的东富龙冻干机
过去是完全由自动化代替人工,现在看来完全代替人工是太理想化,还需要一定的时间,在智能制造流程中,人虽然不再负责提供劳动工作,但仍然扮演生产过程的设计决策者,以及流程的管理者。拓纷HFD系列小型真空冷冻干燥机将具有智能化、无人化、信息化等特性,这类自动化智能化小型冷冻干燥机将能将设备和物料信息联结在一起,用户能快速处理各地物料冻干需求。
大连双瑞科技(09年成立,针对制药行业的)
顺便推荐下自己,上海田枫冻干机。
希望可以帮到你!
A(面积,㎡)=V(体积,m)/H(高度,m)=0.0018m/0.01m=0.18㎡
即需选用板层负荷面积为0.18㎡的冻干机。 冷阱是冷冻干燥过程捕获水分的装置,理论上讲,冷阱温度越低,冷阱的捕水能力越强,但冷阱温度低,对制冷要求高,机器成本及运转费用高。实验系列冷冻干燥机的冷阱温度主要有-45℃左右、-60℃左右、-80℃左右等几个档次。冷阱温度为-45℃的冻干适用于一些容易冻干的产品,冷阱温度为-60℃左右的冻干机适用于大部分产品的冻干,冷阱温度为-80℃的冻干适用于一些特殊产品的冻干。冷阱温度对捕水能力的影响实验表明冷阱温度从-35℃下降到-55℃,捕水能力有提升明显,冷阱温度低于-55℃,冷阱的捕水能力提升不明显。因此,在没有特殊需求的情况下,选用冷阱温度-60℃左右是理想的选择。四环冻干机中LGJ-10D型冷冻干燥机的冷阱温度≤-55℃,LGJ-18系列、LGJ-25系列的冷冻干燥机的冷阱温度≤-60℃,并且采用混合工质制冷技术,在同样制冷机组的情况下,制冷温度低、制冷量大、工作稳定性高、故障率低。四环冻干机还包括有冷阱温度≤-45℃的LGJ-10型冷冻干燥机,适用于一些容易冻干的产品的冻干。LGJ-50C型冷冻干燥机的冷阱温度≤-80℃,特别适用于医药和特殊产品的冻干。
3、降温速率
降温速率体现制冷系统的制冷能力,在空载情况下,冷阱温度应在1小时内达到指标规定的最低温度。例如,冷阱温度≤-60℃的冻干机,机器从打开制冷开始计时,冷阱温度达到-60℃的时间应不大于1小时。
4、极限真空度
极限真空度体现冻干机的泄漏情况及真空泵的抽气效率。冻干箱的真空度,过去的观点认为真空度是越高越好,行业内的观点认为真空度应在一个合理的范围之内。真空度太高了,不利于传热,干燥速度反而下降,但无论如何冻干箱的空载极限真空度应达到15Pa以上。
5、抽真空时间
冻干箱空载的抽空速度,应在半小时之内从大气压抽到15Pa。
6、板层温度均匀性及平整度:
板层温度的均匀性和平整度,对产品质量的均一性有很大的影响,温度均匀性和平整度越好,则冻干产品质量的均一性也越好。冻干机搁板温度控制有加热器型和中间流体型,采用中间流体控制板层的冻干机搁板温度均匀性和平整度好,这种冻干机板层为空心夹层结构,板层的制冷和加热均通过中间流体在板层内部的流体通道循环来实现,因此板层温度均匀一致。四环冻干机中LGJ-50C型冷冻干燥机就采用搁板中间流体的技术。钟罩型冻干机的搁板温度控制基本上都是采用加热器,板层温度一致性稍差。但总体而言,医药用冻干机板层温差应控制在±1.5℃,板内温差为±l℃ ,食品冻干机可适当放宽。
7、控制系统
冻干机的控制系统类型及功能各异,对于实验系列的冻干机,主要应用于物料的冻干工艺摸索和少量试生产。因此,控制系统应可实时显示冻干过程参数并自动记录;设定、修改及有效地执行冻干工艺程序;具备通讯接口,便于数据采集、保存。
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