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相关概念视频

Thermal expansion and Thermal stress: Problem Solving01:27

Thermal expansion and Thermal stress: Problem Solving

San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55 °C.

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可定制的尼克罗姆电线加热器用于分子诊断应用.

Juhee Lim1, Won Han1, Le Tran Huy Thang1

  • 1Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Republic of Korea.

Biosensors
|March 27, 2024
PubMed
概括

本研究提出了一种新的,具有成本效益的方法,用于创建定制加热器,使用尼克罗姆线进行点照顾测试 (POCT). 这种技术使得便携式核酸检测设备能够用于诸如病原体识别等应用.

关键词:
可定制的加热器采暖器的模式 采暖器的模式尼克罗姆电线是什么意思病原体检测检测病原体的检测

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科学领域:

  • 生物医学工程 生物医学工程
  • 分子诊断学 分子诊断
  • 材料科学 材料科学 材料科学

背景情况:

  • 精确的样本加热对于核酸提取和分子检测中的放大至关重要.
  • 传统的热循环系统是重的,昂贵的,和实验室,限制其在 point-of-care 设置中的使用.
  • 在传统实验室环境之外,人们需要便携式,具有成本效益的加热解决方案来进行分子诊断.

研究的目的:

  • 为了引入一个多功能和可定制的加热技术,用于点的护理分子诊断.
  • 为了展示量身定制的加热器的制造,在碳黑-聚二甲基 (PDMS) 件上使用有图案的尼克线.
  • 为了验证这些定制加热器在便携式设备中用于核酸放大技术的适用性.

主要方法:

  • 开发了一种定制加热器的制造方法,通过在PDMS件上排列突出部位并对尼克罗姆 (NiCr) 线进行纹理.
  • 为便携式聚合酶链反应 (PCR) 装置创建了一个具有三个温度区的2D加热器.
  • 设计并测试了微管格式的循环介导同热放大 (LAMP) 的3D加热器.
  • 使用具有成本效益和形状不受限制的材料制造加热器.

主要成果:

  • 成功制造了具有精确温度控制的2D和3D定制加热器.
  • 证明了便携式热循环2D加热器在检测大肠杆菌 (E. coli) 的实用性. coli) O157:H7 DNA通过PCR.
  • 展示了使用循环介导同热放大 (LAMP) 检测病原体DNA的3D加热器的有效性.

结论:

  • 拟议的尼克罗姆电线图案技术为创建定制加热器提供了一个具有成本效益和多功能性的解决方案.
  • 这种加热方法适用于临床检测 (POCT) 应用,使得便携式分子诊断成为可能.
  • 成功的DNA放大证明了这种技术在各种环境中快速检测病原体的潜力.