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Questions tagged [gel]

A gel is a semi-solid that can have properties ranging from soft and weak to hard and tough. Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in the steady-state.

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Why does pectin/agar jelly taste sweet, if they stay solid at 36.5 °C, entrapping sugar?

When we eat pectin jelly(fruit jelly) or agar jelly, they taste sweet. This should imply that sugar entrapped in gel network is somehow exposed and dissolved to saliva. However, pectin and agar gel ...
new's user avatar
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2 votes
0 answers
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What is this gel byproduct of acetylsalicylic acid recrystallization?

I did a very simple acetylsalicylic acid synthesis from salicylic acid and acetic anhydride (with phosphoric acid as a catalyst). After rinsing, filtering and drying the product I dissolved it in ...
Thomas's user avatar
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Can Seaweed Be a Thermoplastic?

I was on the Internet, and I saw this post. This post shows a photo of thermoplastic seaweed, which I thought was impossible. ` BTW, if you're wondering what the difference is between a thermoset and ...
Charlie Nicholson's user avatar
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Silica gel reheating (orange)

I am a non-chemist looking for some advice! I am an archaeologist and am currently using moisture-indicating silica gel (orange) to dry out some metal finds from our excavations. I have reheated ...
Michael Ann Bevivino's user avatar
1 vote
1 answer
730 views

Creating Oxalic Acid Gel for rust removal

While this question relates to an automotive application I consider that it is liable to be best asked on this site. Summary: I wish to create a low cost gel suitable for mixing with Oxalic acid to ...
Russell McMahon's user avatar
1 vote
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Why is a triangular cavity created during wire-cutting of an organic gel?

I conduct wire-cutting on a gel made with organic oil. When I use high cutting rates, the wire cuts the gel in half leaving two smooth cutting surfaces. In contrast, when I use a very low cutting rate,...
vorujak's user avatar
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1 answer
135 views

Sound of ringing gels [closed]

I'm searching for an audio file of the ringing of a ringing gel - does anyone know a source? (I already searched on different video- and sound-platforms and looked up in the literature)
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Does pH affect physical property of agarose and poly(acrylamide) gel?

We want to change pH in hydrogels of agarose and poly(acrylamide) by soaking into an acidic solution after gelation on pH 7.0. Then, the physical property is changed? Now, we consider the condition ...
user93580's user avatar
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Way to create acidic/HCl gel? [closed]

Is there a way to turn azeotropic hydrochloric acid into a gel? I am trying to remove barnacles from the bottom of a boat and normal hydrochloric acid works, but it is tedious because in liquid form ...
Shaka Boom's user avatar
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