From Ice Age to oil boom, discover the challenges faced and the wealth uncovered as humans take over the continent. How did we turn rocks into riches? And what catastrophic natural …

Follow PBS NewsHour’s complete coverage of politics, Congress, the Supreme court and the presidency. Texas Gov. Rick Perry unveils his economic plan. GOP presidential candidate …

I don’t own these clips! Credit goes to Sesame Workshop.“Copyright Disclaimer. Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" ...

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Big Bird and Snuffy are having a playdate today. They decide that first they will play a game where they see who can stay in the air the longest. They start jumping, but find they just come down. They continue jumping, rattling the whole street, including Gordon.

PBS LearningMedia • Video Collection Gather the materials listed above. PowerPoint (Include the interactive External/ Internal) presentations for the laboratory projector/screen. 2. Review safety concerns/rules with students. 3. Lead the dissection by advancing through the …

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该缓冲液可用于抗体和细胞稀释步骤以及表面染色和流式细胞术分析所需的所有清洗步骤。 该缓冲液包含动物血清蛋白，有助于尽可能减少抗体的非特异性结合。 已报告应用流式细胞术分析 了解更多信息. Have Questions? 我们的流式细胞分析染色缓冲液设计用于悬浮液中细胞的免疫荧光染色方案。 该流式细胞分析染色缓冲液是一种缓冲盐水溶液，含有胎牛血清并使用叠氮化钠 (0.09%) 作为防腐剂。 该缓冲液可用于抗体和细胞稀释步骤以及表面染色和流式细胞术分析所需的所 …

1994年2月11日 · Discussion about a legislative proposal that would take Ramsey County's five school districts and merge them into one large county-wide district. Problems Playing Video? …

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