シ ス テム・オ プ ション デュアルフロー

Liquid TEM Holder Dual Flow - 2 inlet 1 outlet - 3 port mixing tip

当社の本ホルダー用デュアルフロー・ミキシングチップは、1つの環境セル内で2つの液体を混合することが可能です。本設計では、同速、または異速での液体双方の利用が可能です。試薬の混合だけでなく、従来のシングルフロー用としても、研究に利用することができます。

 

Featured Research

 

The Origins of a Mineral

Concurrent formation of multiple phases. All scale bars are 500nm. Image courtesy of M.H. Nielson et al. Copyright © 2014, American Association for the Advancement of Science.

In a study published recently in Science, researchers at Lawrence Berkeley, Pacific Northwest National Laboratories, and the University of Washington used Hummingbird Scientific’s dual-flow liquid-TEM sample holder to directly observe calcium carbonate crystal nucleation. Their research reveals the presence of multiple simultaneously-operating nucleation pathways and calls into question traditional assumptions about the nature of the nucleation process. “For a decade, we’ve been studying the formation pathways of carbonates using high-powered microscopes,” explains Dr. Jim DeYoreo, the project lead, in a PNNL press release. “But we hadn’t had the tools to watch the crystals form in real time. Now we know the pathways are far more complicated than envisioned in the models established in the twentieth century.”

Because calcium carbonate is the largest global carbon sink, the results of this study have particular relevance to climatologists, who could use them to help explain the processes through which carbon dioxide is sequestered in rocks, minerals, shells, and reefs. In future work, Dr. DeYoreo and his fellow researchers hope to observe living organisms’ roles in calcium carbonate nucleation.

Reference: M.H. Nielsen, S. Aloni, and J.J. De Yoreo. “In-situ TEM imaging of CaCO3 nucleation reveals coexistence of direct and indirect pathways,” Science 345:6201 (2014) pp. 1158–1162

Abstract | PNNL Press Release | LBL Press Release

Copyright © 2014, American Association for the Advancement of Science

 

Dual Flow Selected Publications

P. J. M. Smeets, K. R. Cho, R. G. E. Kempen, N. A. J. M. Sommerdijk, and J. J. De Yoreo.Calcium carbonate nucleation driven by ion binding in a biomimetic matrix revealed by in situ electron microscopy, Nature Materials (2015) Abstract
 M.H. Nielsen, S. Aloni, J.J. De Yoreo.  “In situ TEM imaging of CaCO3 nucleation reveals coexistence of direct and indirect pathways,” Science  (2014) Abstract

 

Read More