construction, pipe laying, demolition, and scrap handling. Positive Pin Retention 2 (PPR2) Track is an exclusive Caterpillar offering that mechanically locks the link to the pin. • Resists end-play …
Positive Pin Retention Track features specially machined links and pins that allow for the use of a metal retaining ring. This ring is pressed into the groove between the pin and link, locking the …
Improved Positive Pin Retention (PPR) & Positive Pin Retention 2 …
This tooling has been developed to support the assembly and disassembly of Positive Pin Retention (PPR) & Positive Pin Retention 2 (PPR2) track. The improved extruder assembly …
如何理解蛋白相互作用网络（PPIN）的拓扑结构？ - 知乎
2023年2月2日 · 蛋白相互作用网络（PPIN）的拓扑结构是指蛋白质之间相互作用的连接方式和模式，包括 节点度数 、 聚类系数 、 网络密度 、 中心性 等指标。 这些指标反映了蛋白质在网 …
What Are PPR Pipes? Features And Applications of PPR pipes
2023年4月6日 · PPR pipes (Polypropylene Random Copolymer pipes) are a type of plastic pipe made from a blend of polypropylene and ethylene copolymers. PPR is a high-technology …
What Are PPR Pipes? Uses, Advantages & Applications | Price pipes
2024年12月20日 · Polypropylene Random Copolymer (PPR) pipes are plastic pipes made from a random copolymer polypropylene. This is a thermoplastic polymer considered for its high …
Lysine-rich regions located in the C-terminal domain of DNA ...
2025年1月29日 · In this study, we validated its direct interaction with PPIn and identified the binding site consisting of two lysine-rich polybasic regions (PBR) located within its C-terminal …
Novel roles of phosphoinositides in signaling, lipid transport, …
2020年4月1日 · This review will highlight recent discoveries in PPIn biology, focusing on four specific areas: novel roles of PPIns in signaling, PPIn regulation of integral membrane …
What’s PPR in Construction in the USA? A Comprehensive Guide
2025年1月4日 · PPR, or Polypropylene Random Copolymer, is a type of plastic used primarily in the construction of piping systems. This thermoplastic polymer is formed through a process …
神经科学中的蛋白质相互作用网络生物学,Proteomics - X-MOL
在这篇综述中，总结了功能蛋白质组学和系统生物学方法在神经发育过程和神经退行性疾病中对正常神经元功能至关重要的 PPIN 的最新应用。 还讨论了系统性 PPIN 分析如何提供独特的机制 …