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Perchloric acid

高氯酸

公司名称: Sigma-Aldrich
产品编号: 244252
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Inositol Phosphates Purification Using Titanium Dioxide Beads
Author:
Date:
2018-08-05
[Abstract]  Inositol phosphates (IPs) comprise a family of ubiquitous eukaryotic signaling molecules. They have been linked to the regulation of a pleiotropy of important cellular activities, but low abundance and detection difficulties have hampered our understanding. Here we present a method to purify and enrich IPs or other phosphate-rich metabolites from mammalian cells or other sample types. Acid-extracted IPs from cells bind selectively via their phosphate groups to titanium dioxide beads. After washing, the IPs are easily eluted from the beads by increasing the pH. This technique, in combination ... [摘要]  肌醇磷酸(IP)包含普遍存在的真核信号分子家族。 它们与重要细胞活动的多效性的调节有关,但低丰度和检测困难阻碍了我们的理解。 在这里,我们提出了一种从哺乳动物细胞或其他样本类型中纯化和富集IP或其他富含磷酸盐的代谢物的方法。 来自细胞的酸提取的IP通过其磷酸基团选择性地结合到二氧化钛珠子上。 洗涤后,通过增加pH容易从珠中洗脱IP。 该技术与下游分析方法(如PAGE或SAX-HPLC)相结合,开启了前所未有的研究可能性,允许从几乎任何生物或非生物来源对IP进行适当分析。

【背景】肌醇磷酸(IP)是保守信号分子家族,在真核生物中普遍存在(Irvine和Schell,2001; Tsui和York,2010)。它们涉及广泛的细胞活动的调节,包括钙信号传导,运输和磷酸盐稳态(Wilson et al。,2013; Thota和Bhandari,2015; Azevedo和Saiardi,2017; )。然而,我们对IP信号的理解受到了它们难以研究的事实的阻碍。

与其他富含磷酸盐的分子(例如核苷酸)不同,IP在UV / Vis范围内不吸收,并且通常以相对低的丰度存在于细胞中。用于IP检测和分析的传统方法是用 3 ...

Measurement of Inositol Triphosphate Levels from Rat Hippocampal Slices
Author:
Date:
2016-04-05
[Abstract]  Inositol triphosphate (IP3) is an important second messenger that participates in signal transduction pathways in diverse cell types including hippocampal neurons. Stimulation of phospholipase C in response to various stimuli (hormones, growth factors, neurotransmitters, neurotrophins, neuromodulators, odorants, light, etc.) results in hydrolysis of phosphatidylinositol 4, 5-bisphosphate (PIP2), a phospholipid that is located in the plasma membrane, and leads to the production of IP3 and diacylglycerol. Binding of IP3 to the IP3 ... [摘要]  肌醇三磷酸(IP3)是参与信号转导途径的重要的第二信使,包括海马神经元在内的不同细胞类型。 刺激磷脂酶C对各种刺激(激素,生长因子,神经递质,神经营养因子,神经调节剂,气味剂,光等)的反应导致磷脂酰肌醇4,5-二磷酸(PIP2)的水解,磷脂位于质膜 ,并导致IP3和二酰基甘油的生产。 IP3与IP3受体(IP3R)的结合诱导Ca2 +从细胞内储存释放,并使细胞内Ca2 +依赖信号的启动。 在这里,我们描述了从大鼠海马切片制备的组织匀浆中测量细胞IP3水平的程序。

Quantification of Sodium Accumulation in Arabidopsis thaliana Using Inductively Coupled Plasma Optical Emission Spectrometery (ICP-OES)
Author:
Date:
2015-08-20
[Abstract]  Salt stress is a major issue for plants growing in both natural and agricultural settings (Deinlein et al., 2014). For example, irrigation can lead to the build up of salts in the soil as the irrigation water evaporates, leading to salinization, inhibition of plant growth, reduced productivity and eventually to loss of agriculturally usable land. One key element in trying to understand how salt stress impacts plant growth and development, in defining plant salt sensing and response mechanisms and eventually in the breeding or engineering of plants resistant to this stress is ... [摘要]  盐胁迫是对于在自然和农业环境中生长的植物的主要问题(Deinlein等人,2014)。例如,当灌溉水蒸发时,灌溉可导致土壤中盐的积累,导致盐化,抑制植物生长,降低生产力并最终导致农业上可用的土地损失。试图了解盐胁迫如何影响植物生长和发育,确定植物盐感测和响应机制以及最终在抗这种胁迫的植物育种或工程中的一个关键因素是监测它们的盐吸收和再分布。诸如成像Na敏感性荧光探针(Kader和Lindberg,2005)和使用Na离子选择性微电极(Shabala等人,2005)的方法提供了在植物中遵循Na水平的潜力非破坏性的方式,但是在技术上要求和不适用于现场,或甚至许多实验室条件。然而,组织取样,随后电感耦合等离子体光谱(ICP)代表了监测植物样品中的总Na水平的简单,定量测定。 ICP分析也适用于可以收获样品的任何环境中的植物。该方法使用酸溶液中的组织消化,随后将所得样品注入电感耦合等离子体光谱仪并监测来自Na的特征发射光谱。由于Na是稳定的,不需要复杂的样品保存。需要注意来自用于样品制备的水和来自玻璃器皿的标准品和样品中可能的Na污染,否则,该方法简单且稳定。

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