Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
highlights:2025:rhodoliths [2026/06/03 08:30] – Ronell Sicathighlights:2025:rhodoliths [2026/06/03 09:00] (current) – Ronell Sicat
Line 1: Line 1:
-====== 3D Modeling of Composite Membranes from TEM ======+====== Rhodoliths as Daily Resolution Paleotemperature Archives in the Red Sea ======
  
 <WRAP group> <WRAP group>
 <WRAP third column> <WRAP third column>
  
-{{:wiki:highlights:2025:membrane3da.png?400|}}+{{:wiki:highlights:2025:rhodo.png?400|}}
  
 <WRAP center round box 100%> {{:favicon.ico?nolink&0x30}} <fs:26px>** KVL Staff on Project**</fs> <WRAP center round box 100%> {{:favicon.ico?nolink&0x30}} <fs:26px>** KVL Staff on Project**</fs>
Line 18: Line 18:
 {{:icon:twbs:link:w-25:h-auto:envelope-at.svg?nolink&}}  lena.li@mpic.de \\ {{:icon:twbs:link:w-25:h-auto:envelope-at.svg?nolink&}}  lena.li@mpic.de \\
  
-{{:icon:twbs:link:w-25:h-auto:person.svg?nolink&}} Suzana Nunes (KAUST PI)  \\ +{{:icon:twbs:link:w-25:h-auto:person.svg?nolink&}} Maggie Johnson (KAUST PI)  \\ 
-{{:icon:twbs:link:w-25:h-auto:envelope-at.svg?nolink&}}  suzana.nunes@kaust.edu.sa \\+{{:icon:twbs:link:w-25:h-auto:envelope-at.svg?nolink&}}  maggie.johnson@kaust.edu.sa \\
  
 </WRAP> </WRAP>
Line 27: Line 27:
 <WRAP twothirds column> <WRAP twothirds column>
  
-===== Overview ===== +A team of researchers led by KAUST graduate Lena Li with KAUST faculty Maggie Johnson recently published a paper entitled: [[https://www.nature.com/articles/s43247-026-03603-y|"Rhodoliths can act as daily resolution paleotemperature archives in the Red Sea"]]. KVL and scientist Ronell Sicat were acknowledged for providing facilities support and expertise in image processing. 
-A team of KAUST researchers led by postdoc Dr. Fernan Martinez and Prof. Cristian Picioreanu recently published a paper that provides new insights in the field of composite membranes research. In the article, Dr. Martinez developed a 3D solution friction model considering that the ions (Na+ and Cl-) move by a difference in concentration, pressure and electrical potential in the active layer. The results indicated that 2D active layer representation tends to overestimate salt flux. Furthermore, they evaluated the effect of the support layer on the salt permeability, and it was found that the support layer can reduce permeability by a longer transport path in the active layer. Finally, they highlighted that the effective active layer thickness (∼40 nm) was a third of the nominal thickness (∼120 nm), indicating that the values reported in the literature are overestimated. + 
 +The study shows that rhodoliths — free‑living, calcified red algae found widely on the seafloor—can serve as highly detailed natural “thermometers” of past ocean conditions. The researchers developed a new method combining chemical markers, micro‑CT imaging, and advanced time‑alignment techniques to reconstruct daily seawater temperatures from the complex growth patterns of a single rhodolith collected in the Red Sea, producing a continuous 133‑day record. By integrating data from multiple growth directions and chemical indicators, their approach closely matched real temperature measurements, demonstrating much greater accuracy than previous methods. Overall, the work provides proof of concept that rhodoliths can deliver high‑resolution climate records, which could help scientists better understand short‑term temperature variability and improve predictions of how marine ecosystems respond to ongoing ocean warming. 
      
-{{:wiki:highlights:2025:membrane3d.png?1000}}+{{ :wiki:highlights:2025:rhodo.png?600 }}
 \\ \\
-The paper's graphical abstract shown above illustrates the approach used in this work. The paper entitled "Impact of active layer morphology on salt permeability in RO composite membranes: 3D modelling from TEM geometry and effective membrane thickness" can be accessed [[https://www.sciencedirect.com/science/article/pii/S1383586625027728|here]]. Please note that all figures used in this article are directly from the original published paper.+This subset of the paper's Fig. 2 shows a micro-CT image of a rhodolith sample (d) with the curved line perpendicular to the growth line, and a light microscope image (f) showing a 2mm growth in the sample in a span of four months. Please note that this figure is directly from the original published paper. Access it [[https://www.nature.com/articles/s43247-026-03603-y/figures/2|here]].
  
-KVL's visualization scientist Dr. Ronell Sicat supported Dr. Martinez in pre-processing the TEM scans, testing segmentation methods, and eventually post-processing the segmentation and extracted surfaces in order to get 3D geometries that were suitable for the target simulation software. KVL also provided free access to Avizo software for data visualization, segmentation, and analysis and a powerful workstation with a pen-and-tablet interface that enabled faster manual segmentation of the TEM data. KVL's contribution is acknowledged in the paper.+KVL's visualization scientist Dr. Ronell Sicat supported Lena Li in image processing and finding ways to track the growth line. KVL also provided free access to Avizo software for data visualization and analysis and a powerful workstation. KVL's contribution is acknowledged in the paper.
  
 </WRAP> /* end column */ </WRAP> /* end column */