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100-1000 μl Pipette tips

Company: Thermo Fisher Scientific
Catalog#: 111-N-Q
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Dissection and Whole Mount Staining of Retina from Neonatal Mice
Author:
Date:
2018-10-05
[Abstract]  Here we provide a detailed protocol for whole mount staining of mouse retina. This protocol was used to analyze retinal angiogenesis in newborn mice (Sawaguchi et al., 2017) by modifying the original protocols (Powner et al., 2012; Tual-Chalot et al., 2013). This protocol can also be used for whole mount staining of adult retina. [摘要]  在这里,我们提供了小鼠视网膜整体染色的详细方案。 该方案用于分析新生小鼠的视网膜血管生成(Sawaguchi et al。,2017),修改原始方案(Powner et al。,2012; Tual-Chalot et al。,2013)。 该方案也可用于成人视网膜的整体染色。

Heavy Metal Stress Assay of Caenorhabditis elegans
Author:
Date:
2017-06-05
[Abstract]  Organisms have developed many protective systems to reduce the toxicity from heavy metals. The nematode Caenorhabditis elegans has been widely used to determine the protective mechanisms against heavy metals. Responses against heavy metals can be monitored by expression of reporter genes, while sensitivity can be determined by quantifying growth or survival rate following exposure to heavy metals. [摘要]  生物开发了许多保护系统,以减少重金属的毒性。线虫秀丽隐杆线虫已广泛用于确定重金属的保护机制。可以通过报告基因的表达来监测对重金属的反应,而敏感性可以通过量化暴露于重金属后的生长或存活率来确定。

背景 一些重金属如砷,镉和汞已知对包括人类在内的大多数生物有害(Valko et al。,2005)。为了降低这些金属的毒性,生物开发出各种保护系统。线虫秀丽隐杆线虫已被用于了解重金属的保护机制。以前的研究表明,许多基因,如解毒酶,转录因子和信号传导因子都参与了该生物体中重金属的保护(Broeks et al。,1996; Mizuno et al。 ,2004; Inoue等人,2005; Schwartz等人,2010)。除了测量报告基因表达外,生存力和生长的测定通常用于监测重金属在C中的影响。线虫。在本协议中,我们描述了使用C测定砷,铜和镉的方法。线虫。

Simple Spectroscopic Determination of Nitrate, Nitrite, and Ammonium in Arabidopsis thaliana
Author:
Date:
2017-05-20
[Abstract]  Plants use nitrate, nitrite, and ammonium as inorganic nitrogen (N) sources. These N compounds are included in plant tissues at various concentrations depending on the balance between their uptake and assimilation. Thus, the contents of nitrate, nitrite, and ammonium are physiological indicators of plant N economy. Here, we describe a protocol for measurement of these inorganic N species in A. thaliana shoots or roots. [摘要]  植物使用硝酸盐,亚硝酸盐和铵作为无机氮(N)源。这些N化合物根据其吸收和同化之间的平衡以各种浓度包含在植物组织中。因此,硝酸盐,亚硝酸盐和铵的含量是植物N经济的生理指标。在这里,我们描述了在A中测量这些无机N物质的方案。 thaliana 芽或根。

背景 无机氮含量的测定对于预测植物吸收和吸收氮的能力很重要。研究人员经常使用需要昂贵设备的技术,如高效液相色谱(HPLC),用于这些测量。本协议基于通用光谱法与廉价的试剂,使其适用于许多研究人员。在酸性条件下,硝酸盐引起水杨酸的硝化,随后加入碱性溶液会导致黄色复合物。在酸性条件下,亚硝酸盐与磺胺类反应产生重氮化合物,其与N - (1-萘基)乙二胺进行重氮偶联,形成粉红色偶氮化合物。在硝普钠盐的催化作用下,铵可以测定为蓝色靛酚衍生物。每个实验程序容易,快速,简单。

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