Our heterocyclic compounds has been developing from 2015 year, it is a relatively new class of compounds in our company. Our heterocyclic compounds conducted by a dedicated research and development teams. The R & D team focused on researching heterocyclic compounds, other products are performed by other technical team. Our goal is to catch up with the industry's professional heterocyclic manufacturer. At present our products are mainly composed of pyridine, pyrimidine, thiazole. In addition to our regular products, we accept any form of customized services, to undertake from grams to tons of production. After receiving inquiry, we will give a quotation within 2 working days with coa specifications,If you have special requirements, please provide details in the mail, we will combine the specific requirements and provide an accurate accounting of the costs of the offer. Under normal circumstances, we have the longest production cycle is not more than 45 days. Heterocyclic Compounds,Cyclopropanecarboxylic Acid,Benzenedithiol Dihydrochloride Taizhou Volsen Chemical Co., Ltd. , https://www.volsenchem.com
Shark fin processing technology
Shark fin is derived from the dorsal, pectoral, and lower caudal fins of sharks. Known for its high nutritional value, it is believed to support blood circulation, strengthen the qi, nourish the kidneys, lungs, and improve stomach health. To ensure a more standardized and efficient processing method, we introduce the modern technique for fresh shark fin preparation into "Ming fin" production.
The process begins with freezing the shark fins, followed by thawing, drying, removing the base meat, hot sand treatment, scraping off the sand, washing, bleaching, rinsing, de-boning, further drying, grading, and finally packaging. This detailed procedure ensures that the final product maintains quality and meets industry standards.
First, drying is carried out either in the sun or using an oven. The temperature should be carefully controlled at around 40°C to prevent damage to the delicate structure of the fins. Next, the base meat—also known as the connective tissue—is removed using a knife or chainsaw. This step helps to enhance the texture and appearance of the finished product.
Then comes the hot sand treatment. Water is added in an amount 1.2 times the weight of the dried fins, and the mixture is heated to approximately 60°C. The fins are submerged and flipped regularly to ensure even heating. Once the water cools to about 50°C, they are left to soak for roughly 20 minutes. A fingernail or small knife is used to test the fins; if the sand can be easily scraped off, cold water is introduced to remove any remaining blood, mucus, and impurities. Afterward, the fins are lifted and drained.
Scraping the sand is done using a razor blade, starting from the base of the fin and moving toward the tip. This step is crucial for achieving a clean and smooth surface. Following this, the fins are washed thoroughly under running water to remove any remaining sand particles and impurities. They are then soaked in a hydrogen peroxide solution (1 part of 40% hydrogen peroxide mixed with 15 parts of water) for 20 minutes to whiten and disinfect the fins.
Next, the fins are rinsed under running water for about 60 minutes to eliminate any residual hydrogen peroxide, salt, and unwanted substances. After rinsing, the cartilage in the center of the fin is removed using a boning knife. The pectoral fins are split into two halves by hand, while the dorsal fins are cut into two pieces connected by the fin tip.
The next step involves further drying, either in the sun or in a drying room, ensuring that the moisture content of the final product stays below 12%. This helps in preserving the quality and extending the shelf life of the shark fins. Once dried, the fins are graded based on their type, location, size, and overall quality.
Finally, the graded fins are packed into plastic bags, compacted, sealed tightly, and placed into sturdy cartons for shipping and storage. This comprehensive process ensures that the shark fins meet the highest standards of quality, safety, and presentation.