Traditional Chinese How to keep fish fresh: Workshop Formula, Ratios & Method
In short: Traditional Chinese How to keep fish fresh. This entry documents a formula & ratios taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 4762 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
How to keep fish freshAmong the ways to preserve fish, there are vacuum packaging, deoxidizer packaging, carbon dioxide filling packaging, etc. These methods can effectively inhibit bacterial proliferation and prevent lipid oxidation. However, the inhibitory effect on fish autodigestion is not good.What is digestion? It turns out that after an animal dies, even if it is stored in an anaerobic environment, the glycogen in its body tissues is still decomposed, and adenosine triphosphate (ATP) also begins to decompose. As ATP decreases at an accelerated rate, muscles contract and the dead body becomes stiff. - Generally, fish begin to become stiff within about 7 hours after death, and the duration of stiffness is often shorter than that of mammals, which can only last about 5 to 22 hours. After the stiffness period, the muscles gradually become softer. This change is called autodigestion. The phenomenon of autodigestion occurs when muscle protein changes due to the presence of oxygen in muscle tissue. Even if the muscle is preserved aseptically, autodigestion is still going on. Therefore, by prolonging the stiffness time of the body and thus controlling the autodigestion to the maximum extent, the preservation effect of fish meat can be greatly improved.To this end, researchers from Japan's Asahi Kasei Industrial Company invented a method of injecting an alkaline solution into the fish body and then sealing and packaging it to keep it fresh. The specific steps are as follows.1. Inject an alkaline solution with a pH value in the range of 7 to 12 into live fish. In order to improve work efficiency and try to quickly immerse the alkaline solution into the fish body, multiple syringes can be used at the same time, with a small amount and multiple parts, focusing on injecting the internal organs.Water-soluble inorganic alkaline substances suitable for the present invention include methyl carbonate, sodium carbonate, sodium bicarbonate, potassium pyrophosphate, sodium pyrophosphate, sodium nitrite, potassium nitrite, etc. Organic alkalis include sodium acetate, calcium propionate, sodium propionate, sodium citrate, sodium malate, sodium benzoate, etc.The concentration of the alkaline aqueous solution is 1 …
Sign in to unlock
One-time payment per article, billed in credits (1 $ = 100 credits). You will review the invoice and the non-refundable digital-asset policy before anything is charged. The PDF is generated on demand and embeds a licensing watermark.
Unlock this article
One-time payment · permanent access after unlock · 1 $ = 100 credits
Member level pricing for this article
| Level | Cumulative top-up | Discount | Your price | You save |
|---|---|---|---|---|
| Free | Free | — | 7,962 credits | — |
| Bronze | $100.00+ | 2% off | 7,803 credits | 159 credits |
| Silver | $1,000.00+ | 5% off | 7,564 credits | 398 credits |
| Gold | $5,000.00+ | 10% off | 7,166 credits | 796 credits |
| VIP | $20,000.00+ | 15% off | 6,768 credits | 1,194 credits |
Prices are billed in credits (1 $ = 100 credits). Your level upgrades automatically as your cumulative top-up grows. Top up to unlock a higher discount ›
All articles are digital assets. Once a PDF is downloaded, the purchase is final and non-refundable.
Please log in to unlock this article.
Payment Methods
pay@viprole.com
Lei Cheng
pay@viprole.com
Lei Cheng