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ramé-hart Newsletter

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July 2022

Discovering Superhydrophobicity in the Palezoic Era
We've addressed the marvels of superhydrophobicity many times in the column. We've discovered myriad examples of superhydrophobic surfaces found in nature - from the Lotus leaf to the Namid Desert beetle. And we've studied the hierarchal structures found in nature in order to better appreciate the multitude of bioinspired manmade nanostructured surfaces which exhibit similar super high contact angles with liquid droplets in the Cassie-Baxter state.

However, until recently, we have not contemplated what effect superhydrophobicity may have had on the development of the earth and early living matter in the neighborhood of a billion years ago to 400 billion years ago. Researchers in Germany have detailed how superhydrophobicity likely assisted in the evolution from water-based bacteria to algae and slime molds to more complex land-based plants like ferns and mosses.1

At the Botantical Garden at the University of Bonn, for example, researchers have successfully grown a highly water-repellent cyanobacterial film called Hassalia, a type of biofilm that may date back one billion years or more. See image below.  It's now believed that superhydrophobicity played a key role as bacteria evolved into various forms of terrestrial growth. The German researchers, led by Wilhelm Barthlott, discovered that when the biofilm dries out on land, it can become stably superhydrophobic for life. This feature permits the transition from water to land. The main role water repellency plays in the evolutionary process is to guard against water loss, a necessity for life.

Water Drop on Superhydrophobic Hassalia Biofilm
©2022 Photo: W. Barthlott/Uni Bonn

It's proposed that high water repellency at that crucial interface with the environment coupled with the self-cleaning nature of superhydrophobic surfaces may have assisted primitive bacteria and algae evolve from water-based organisms to land-based growth. This leads us to better appreciate the role non-wetting surfaces may have played during early days of the earth's development. In a similar vein, we gain a greater appreciation for today's nanostructured bioinspired surfaces that seek to emulate the qualities of organisms that are a billion or more years old.


1 See https://doi.org/10.3389/fpls.2022.880439


ramé-hart Introduces a New Custom Spinneret with Tubing Inlets

SUCCASUNNA, NJ, June 21, 2022 - ramé-hart instrument company announces a new spinneret product. Over the past decade ramé-hart, the world leader in custom spinnerets, has fabricated at their New Jersey facility thousands of custom and prebuilt coaxial, triaxial, and quadaxial needles. Based on extensive customer feedback, ramé-hart has developed a new design, the Custom Coaxial Needle with Tubing, which adds flexibility for users. In lieu of the traditional female Luer fittings on the two inlets, tubing fittings are used which connect to the very popular 1.5mm ID PTFE Tubing. An option is available to convert the inner flow fitting from a tubing fitting to a female Luer connection in the event the user wishes to connect the inner flow directly to a syringe. Much like the Custom Coaxial Needle product, needle gauges and dimensions are user specified. A number of additional options are available. A new worksheet has been developed for the Custom Coaxial Needle with Tubing which can be found, along with ordering instructions, on the www.customspinnerets.com website: go to Products, then Coaxial Needles page, then go to Box 3. Like the other custom spinnerets sold by ramé-hart, this new product can be configured and ordered online. And much like the other customs spinneret products, fabrication time is one week or less. The product can be shipped to any address in the world.

About ramé-hart instrument co.
ramé-hart was born in 1961. During the 1960s, ramé-hart developed the world's first commercially available contact angle goniometer. Today, over 60 years later, ramé-hart continues to innovate and is the world leader in contact angle goniometry and tensiometry with over ten software-based camera-driven instrument models currently available and over two dozen accessories. For more information on the goniometer products, please visit
www.ramehart.com. For over 10 years ramé-hart has also become the world leader in custom spinnerets used for electrospraying, electrospinning, 3D printing, bioprinting, and related applications. For more information on the spinneret products, please visit www.customspinnerets.com.

ramé-hart p/n 100-10-COAXTUBE
Custom Coaxial Needle with Tubing

How to Save
Order the new Custom Coaxial Needle with Tubing online
here and use coupon code SAVE50 to get $50 off your first order. Order three or more spinnerets (any variety), and save $150 with SAVE150 coupon code. Or, if you prefer, you can use FREESHIPPING coupon code to get your spinneret order shipped free to any address in the world. Limit one coupon per order. Limit two uses per customer. All coupons expire on 1-Aug-2022. So, act now.

Contact Details
For any inquiry, please
contact Carl Clegg, Director of Sales, ramé-hart instrument co., via phone 973-448-0305 or email.


Carl Clegg
Director of Sales
Phone 973-448-0305
Contact us


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