Scientists in Singapore Transform Fruit Leftovers into Antibacterial Bandages

Durian husk and petri dish containing cellulose hydrogel sheet made out of durian husk with yeast phenolics are seen in Singapore September 16, 2021. (Reuters)
Durian husk and petri dish containing cellulose hydrogel sheet made out of durian husk with yeast phenolics are seen in Singapore September 16, 2021. (Reuters)
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Scientists in Singapore Transform Fruit Leftovers into Antibacterial Bandages

Durian husk and petri dish containing cellulose hydrogel sheet made out of durian husk with yeast phenolics are seen in Singapore September 16, 2021. (Reuters)
Durian husk and petri dish containing cellulose hydrogel sheet made out of durian husk with yeast phenolics are seen in Singapore September 16, 2021. (Reuters)

Scientists at Nanyang Technological University (NTU) in Singapore are tackling food waste by turning discarded durian husks into antibacterial gel bandages.

The process extracts cellulose powder from the fruit’s husks after they are sliced and freeze-dried, then mixes it with glycerol. This mixture becomes soft hydrogel, which is then cut into bandage strips.

“In Singapore, we consume about 12 million durians a year, so besides the flesh, we can’t do much about the husk and the seeds and this cause environmental pollution,” said Professor William Chen, director of the food science and technology program at NTU. The fruit’s husks, which make up more than half of the composition of durians, are usually discarded and incinerated, contributing to environmental waste.

Chen added that the technology can also turn other food waste, such as soy beans and spent grains, into hydrogel, helping limit the country’s food waste.

Compared to conventional bandages, the organo-hydrogel bandages are also able to keep wound areas cooler and moist, which can help accelerate healing.

The researchers say using waste materials and yeast for the antimicrobial bandages is more cost effective than the production of conventional bandages, whose antimicrobial properties come from more expensive metallic compounds like silver or copper ions.

A durian wholeseller, Tan Eng Chuan, said he goes through at least 30 crates of durians a day during durian season - as much as 1,800 kg. Being able to use the parts of the fruit that are ordinarily discarded, he said, was an innovation that would make enjoying it “more sustainable”.



Saudi Students Compete in 57th International Chemistry Olympiad in Dubai

Saudi Flag / File/Reuters
Saudi Flag / File/Reuters
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Saudi Students Compete in 57th International Chemistry Olympiad in Dubai

Saudi Flag / File/Reuters
Saudi Flag / File/Reuters

Saudi students are participating in the 57th International Chemistry Olympiad (IChO), the world’s largest high school chemistry competition, currently taking place in Dubai through July 14, bringing together over 300 students from around the world.

The scientific team has finalized the review and translation of the practical exam for the Saudi students, who are preparing to take their first test on Tuesday, SPA reported.

This year, the Kingdom is represented by a team of four male and female students who have undergone thousands of hours of intensive training under the supervision of the King Abdulaziz and His Companions Foundation for Giftedness and Creativity (Mawhiba), in strategic partnership with the Ministry of Education.

Saudi Arabia has earned a total of 45 awards in its past participations in IChO, which has been held annually in a different country since its launch in 1968. These include 15 silver medals, 28 bronze medals, and two certificates of appreciation.