"The substances behind the slimy strings from okra and the gel from fenugreek seeds could trap microplastics better than a commonly used synthetic polymer.

Texas researchers proposed in 2022 using these sticky natural polymers to clean up water. Now, they’ve found that okra and/or fenugreek extracts attracted and removed up to 90% of microplastics from ocean water, freshwater, and groundwater.

With funding from the U.S. Department of Energy, Rajani Srinivasan and colleagues at Tarleton State University found that the plant-based polymers from okra, fenugreek, and tamarind stick to microplastics, clumping together and sinking for easy separation from water.

In this next stage of the research, they have optimized the process for okra and fenugreek extracts and tested results in a variety of types of water.

To extract the sticky plant polymers, the team soaked sliced okra pods and blended fenugreek seeds in separate containers of water overnight. Then, researchers removed the dissolved extracts from each solution and dried them into powders.

Analyses published in the American Chemical Society journal showed that the powdered extracts contained polysaccharides, which are natural polymers. Initial tests in pure water spiked with microplastics showed that:

One gram of either powder in a quart (one liter) of water trapped microplastics the most effectively.

Dried okra and fenugreek extracts removed 67% and 93%, respectively, of the plastic in an hour.

A mixture of equal parts okra and fenugreek powder reached maximum removal efficiency (70%) within 30 minutes.

The natural polymers performed significantly better than the synthetic, commercially available polyacrylamide polymer used in wastewater treatment.

Then the researchers tested the plant extracts on real microplastic-polluted water. They collected samples from waterbodies around Texas and brought them to the lab. The plant extract removal efficiency changed depending on the original water source.

Okra worked best in ocean water (80%), fenugreek in groundwater (80-90%), and the 1:1 combination of okra and fenugreek in freshwater (77%).

The researchers hypothesize that the natural polymers had different efficiencies because each water sample had different types, sizes and shapes of microplastics.

Polyacrylamide, which is currently used to remove contaminants during wastewater treatment, has low toxicity, but its precursor acrylamide is considered toxic. Okra and fenugreek extracts could serve as biodegradable and nontoxic alternatives.

“Utilizing these plant-based extracts in water treatment will remove microplastics and other pollutants without introducing additional toxic substances to the treated water,” said Srinivasan in a media release, “thus reducing long-term health risks to the population.”

She had previously studied the use of food-grade plant extracts as non-toxic flocculants to remove textile-based pollutants from wastewater and thought, ‘Why not try microplastics?’"

Cutting - in my opinion, the most labor intensive part of the process. The amount of time/effort needed varies depending on the pattern and if seam allowance is included or marked separately, but no matter what this process can not be done by machine. Each and every panel and piece of fabric that goes into a garment must be cut by hand by a person.

Pinning/clipping - pinning (or clipping) is the stage at which you align the pieces you are going to be stitching together and hold them together with — you guessed it! — either pins or clips. This can not be done by machine.

Stitching - the actual sewing. This can be done by a sewing machine, but that machine still needs to be operated by a human being.

Ironing/pressing - two words that mean the same thing. The iron itself is a machine, but once again, it needs to be operated by a human being.

Finishing - depending on the technique you use, there are certain finishing techniques that can only be done by hand. But, let’s assume we’re talking about fast fashion, which is usually just finished with a simple overlock/serger. Once again: these machines need to be operated by people.

These are just the basic steps to making a garment, and don’t include textile arts that I am not as knowledgeable about, such as weaving, knitting, and crochet. Also, it is important to note that there are a lot of things that can only be done by hand, such as certain stitches and decorative techniques.

Also, the machinery being operated in textile factories is not equivalent to a domestic sewing machine. We’re talking about one of these guys:

See that gray cylinder under the table, behind the knee pedal? That’s the motor. These machines can sew through your fingers bones and all and not even stop. The people in these factories and sweatshops are operating heavy machinery, and are subject to all the risk that comes with that in addition to all of the work I mentioned above.

And then you complain about your clothes having loose threads.

OP: Why couldn’t traditional Chinese Yinpiao银票/silver drafts be forged if they were merely slips of paper? (cr大明宝钞，渐越)

Traditional Chinese yinpiao/silver drafts were paper vouchers issued by private banks starting from the Song Dynasty(960–1279). People could exchange these slips for physical silver at bank branches across the country.

Silver drafts were made in multiple copies with matching serrated seal edges. One copy went to the customer and others stayed at the bank. All edges had to fit perfectly together to withdraw silver. The unique split edge marks were almost impossible to copy.

This mechanism is known as qifeng骑缝 (split-joint seal) in China. It first originated in the Western Zhou Dynasty (1046–771 BC). The Rites of Zhou records that contracts were written on bamboo or wooden slips in duplicate. Notches and marks were carved in the middle before splitting the slips, with each party keeping one half. The two halves would be matched by their notches for verification.

During the Spring and Autumn and Warring States periods (770–221 BC), this idea evolved into hufu虎符/tiger tally tokens. A military tally was split into two pieces with identical inscriptions carved along the split edge. Troops could only be deployed if the patterns and characters on both halves perfectly aligned, serving as a metal version of the split-joint anti-counterfeiting system.

The technology matured in the Tang Dynasty (618–907). Government documents and private contracts commonly used split-joint seals stamped across the dividing line. The Chinese character "hetong合同" (contract) was written across the middle before the paper was torn apart, so the complete characters would only appear when the two halves were put together. This split-coupon system was later adopted for Song Dynasty (960–1279) jiaozi paper money and yinpiao/silver drafts of the Ming and Qing dynasties (1368–1912).

Official Song dynasty paper money (Jiaozi交子) was abolished in 1107. Private silver drafts issued by Qing-era piaohao票行 (ancient exchange banks) vanished completely in 1951, hit hard by modern banks and currency reforms. Nowadays silver drafts no longer circulate as currency. Their collectible value depends on their rarity and physical condition.

First they were called "chirographs", but later the word "indenture" (in its earliest meaning as just a legal document of any kind between two people) came to be used, originating from the practice of a contract being written twice on a single piece of parchment and then cut in half with serrated edges (as in dent, "teeth" -> indents -> indenture) in order for each party to take one half, so they could later piece them together and verify that there had been no forgery -- same as the Chinese silver drafts!

(Charter of the Clerecía de Ledesma, 1252, showing the serrated indents at the top -- presumably they are cutting rather than tearing because they're using parchment, which I expect is much harder to tear than wood-pulp paper like the Chinese were using)

1. if you feel judged and hurt by others, try sleeping

2. if you feel judgmental and resentful of others, try eating (the classics)

3. if you feel uncomfortable, try showering

4. if you feel directionless and afraid, go sit outside for a bit and maybe then you'll calm down. maybe even a walk if youre feelin crazy

Whereas the reality is far more like

Next up someone is going to claim that the Narnia series isn't kids books.

Book that was bad: this sucked 👎

so then i tried "shag birds uk"

Anyway, early on, I do my rounds one day and get back to my office to record the findings. As I'm looking at one of the photos, I think to myself "Hang on. These look different from the others. They have black heads, not blue, and I think maybe they are bigger. Perhaps these are great tits?"

But of course! As they were still moulting, I wasn't sure; and so, with the wisdom of the terminally stupid, I confidently opened up Google, went to an image search, and there on my work computer in my office in my brand new job, I typed in "great tit chicks."

The results I got were not what I expected. But. Should have been.

I had to IMMEDIATELY go and fess up to my new boss and be like HEY I don't know if you monitor our internet use at all but uuuhhhhhh I can explain. Fortunately she just about pissed a kidney laughing, so it was okay.