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PIPETMAN® L, P1000L, 100-1000µL

PIPETMAN ® L

Company: Gilson
Catalog#: P1000L
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Fluorescein Transport Assay to Assess Bulk Flow of Molecules Through the Hypocotyl in Arabidopsis thaliana
Author:
Date:
2018-04-05
[Abstract]  The bulk transport of molecules through plant tissues underpins growth and development. The stem acts as a conduit between the upper and low domains of the plant, facilitating transport of solutes and water from the roots to the shoot system, and sugar plus other elaborated metabolites towards the non-photosynthetic organs. In order to perform this function efficiently, the stem needs to be optimized for transport. This is achieved through the formation of vasculature that connects the whole plant but also through connectivity signatures that reduce path length distributions outside the vascular system. This protocol was devised to characterize how cell connectivity affects the bulk flow of molecules traversing the stem. This is achieved by exposing young seedlings to fluorescein, for ... [摘要]  分子通过植物组织的大量运输支撑了生长和发育。茎部充当植物上部和低部位之间的导管,促进溶质和水从根部向茎部系统的运输,糖和其他精细代谢物向非光合器官转运。为了有效地执行此功能,杆需要针对运输进行优化。这通过形成连接整个植物的脉管系统来实现,但也通过连接特征来减少血管系统外的路径长度分布。该协议被设计为描述细胞连接如何影响穿过茎的分子的大量流动。这是通过将幼苗暴露于荧光素而实现的,其中假定没有特定的转运蛋白存在于A中。在给定的暴露时间后,使用共焦显微镜和定量3D图像分析评估该荧光化合物在胚胎干(下胚轴)的单个细胞中的相对浓度。

【背景】结构和功能之间的联系一直着迷于生物学家,从器官的设计空间(Eldredge,1989)到进化路径的趋同或分歧(Morris,2003)。在较小规模的情况下,细胞也以稳健且严格控制的方式组织,与组织执行的功能密切相关(Jackson等人,2017a)。构成特定组织的细胞物理相互作用的集合也可被视为网络,即细胞连接体。这种连接体在植物中特别有趣,因为共享细胞壁阻碍细胞运动,因此网络动力学仅取决于细胞死亡和复制。

我们假设组织结构和细胞连接体与生理特征和器官功能有关。这样,网络指标和定量网络分析可用于预测并获得生物系统的理解(Duran-Nebreda和Bassel,2017; Jackson等人,2017b)。 ...

Chemosensitivity Assay
Author:
Date:
2013-09-05
[Abstract]  Chemoresistance is one of the special properties of cancer stem cells, which is the main cause of chemotherapy failure and plays an important role in the recurrence of various cancers including osteosarcoma. The most widely used assay for evaluating chemoresistance is the modified cell proliferation assay. An equal number of cells are seeded onto 96-well culture plates or 24-well plates, and then different concentrations of anti-cancer drugs are added into each well. After that, measure the cell density or cell activity to observe the effect of anti-cancer drugs to cancer cells or cancer stem cells. The chemoresistance of cells is stronger, the cell density or cell activity is higher. Here, we describe chemosensitivity assays for osteosarcoma cells and osteosarcoma stem-like cells.
[摘要]  化学抗性是癌症干细胞的特殊性质之一,其是化疗失败的主要原因,并且在各种癌症(包括骨肉瘤)的复发中起重要作用。 最广泛使用的用于评价化学抗性的测定法是修饰的细胞增殖测定法。 将等量的细胞接种到96孔培养板或24孔板上,然后将不同浓度的抗癌药物加入每个孔中。 之后,测量细胞密度或细胞活性,观察抗癌药物对癌细胞或癌症干细胞的作用。 细胞的化学抗性更强,细胞密度或细胞活性更高。 在这里,我们描述了骨肉瘤细胞和骨肉瘤干样细胞的化学敏感性测定。

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