Revolutionizing Fruit Preservation: Dr. Nguyen Van Kai and his Ozonic Liquid

Nguyen Van Kai, known as Mr. Ozonic Liquid, is a chemist famous for his preserving fluid that extends the lifespan of fruits and vegetables. Produced in Hanoi, the liquid is claimed to kill bacteria and pests safely. Despite its benefits, Kai faces challenges convincing farmers of its safety. The liquid's patent was acquired from Russian scientists, and Kai is the sole promoter in Southeast Asia. In Langson province, agriculture thrives, particularly custard apples, but farmers face difficulties in harvesting. Kai demonstrates his product to local farmers, aiming to improve their produce preservation.

What is Nguyen Van Kai known for in Vietnam?

• His work in military strategy

• His role in the Vietnamese government

• His invention of a preserving fluid

• His contributions to Vietnamese literature

What is the main agricultural product mentioned in Langson province?

• Rice

• Custard apples

• Bananas

• Coffee

What challenge do farmers face when harvesting custard apples in Langson province?

• Lack of water supply

• Poor soil quality

• Steep mountain slopes

• Insect infestations

What difficulty does Dr. Kai face in promoting his Ozonic liquid?

• High production costs

• Lack of patent rights

• Competition from other products

• Convincing farmers of its safety

Where did the patent for the Ozonic liquid originate?

• Japan

• Russia

• United States

• China