Sweeteners are food Additives that give soft drinks sweet taste. Sweeteners can be divided into nutritive sweeteners and non-nutritive sweeteners according to their nutritional value, low sweetness sweeteners and high sweetness sweeteners according to their sweetness, and natural sweeteners and synthetic sweeteners according to their sources. The sweeteners produced and sold by our company have the characteristics of high safety, good taste, high stability, good water solubility and reasonable price.
The main function of sweeteners
The main role of sweeteners in food:
(1) Palate: Sweetness is one of the indicators of many foods, in order to make food and beverage have a palatable feeling, it is necessary to add a certain amount of sweetener.
(2) The regulation and enhancement of flavor, generally need sweet in pastries; in beverages, the adjustment of flavor has a "sugar-acid ratio" item. Sweeteners can make the product get good flavor and retain fresh taste.
(3) The formation of flavor, sweetness and the flavor of many foods are complementary, many products taste is produced by the combination of flavor substances and sweeteners, so many foods are added sweeteners.
There are many kinds of sweeteners, which can be divided into natural sweeteners and synthetic sweeteners according to their sources, nutritive sweeteners and non-nutritive sweeteners according to their nutritional value, and sugar and non-sugar sweeteners according to their chemical structure and properties.
Glucose, fructose, sucrose, maltose, starch sugar and lactose are natural sweeteners, but because they have long been eaten by people and are important nutrients, they are usually regarded as food raw materials and are not used as food additives in China.
Non sugar sweeteners are natural sweeteners and synthetic sweeteners. Natural sweeteners include stevia, licorice, Disodium Glycyrrhetate, three potassium glycyrrhizinate and three sodium. Synthetic sweeteners include saccharin, saccharin sodium, sodium cyclohexylaminosulfonate, aspartate phenylalanine methyl ester alitame, etc.
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Sweetening Agents,Sodium Cyclamate,Betaine Hydrochloride,Cyclamate Sweetener Shandong Chenyi Environmental Protection Technology Co.,Ltd , http://www.chenyichem.com
First, living habits
Gracilaria is an offshore warm-water fish. I like to inhabit the sea area where the sediments are rocks and gravel. Feeding mainly benthic crustaceans, molluscs and small fish. After many years of breeding experiments, the authors have learned that the optimum temperature range of the scallops is between 9.5°C and 32°C. When the water drops below 9.5°C, there is anxiety and death occurs at 8°C. Gracilaria is highly adaptable to low-specific gravity seawater, and it is found in pond culture that it can also live normally in 1.08 brackish water.
The growth rate of the scallops is very fast. The authors will catch fry of 5.6 cm in average body weight and 1.9 g in weight in early June and grow to 9.2 cm in length and 7.4 g in body weight in the middle of June; farming to early September. The body is as long as 24.7 centimeters and weighs 177.5 grams. By the end of October, the body is 29.4 centimeters long and weighs 367 grams. By mid-November, the average body is 33.8 centimeters long and weighs 536 grams.
The survival rate of ? 黄 姑 was also very high. In 1992, it was cultivated in cages in Sanpan Harbor, Dongtou County. In the first half of June, 8214 fry were received, and raised to 7460 on June 25th. As of November 8th, the number of catches was 7,295 and the survival rate of the culture was as high as 97.97%. In the breeding process, a total of 21,350 kilograms of fresh fish and shrimp bait was put into use, and the bait coefficient was 5.58.
Second, cage culture technology
1, the source of seed and fishing methods. In the shallow seas of Zhejiang and Yunnan, there are a certain number of distributions of 黄C. In shallow seas in southern Zhejiang, seedlings are generally seen after early May. At this time, the fry is about 3.5 centimeters, and the hi-node group is active in the bay or shallows, which is the best time for fishing. Generally can be captured with a small hand-pickup fence. In late June, the fry grows to about 10 centimeters. When the fry have gradually dispersed to the rocky beach or the reef, the fishing is difficult with the seine net. You can use hand-fishing fishing, or use a towel net. The.
2, the identification of true "fake" fry: In the sea fishing seedlings, there will often be some Shitouke fry which is not a striated scallop, and the raising people call it "fake" fry. Due to the small individual fry, identification is more difficult. After years of observation, the author summarizes the following identification methods and precautions:
1 The fake fry appears a lot of time earlier than the true smolt fish. It is often the first time that the “fake†fry is caught and the true fry appears one week later.
2 "False" fish body yellowish, poor luster; true fry silver gray, blue, good gloss.
3 "Fake" fry is short and real fry is slightly longer.
4 "Fake" fish head is large, kiss is short, real fish seed is small, kiss tip.
5 True fish otoliths have "L" shaped hooks and "fake" fry are different.
6 The survival rate of true fry is high, and the “fake†fry is very likely to die.
3, raising fish fry. After catching the fry, since the individuals are very small, it is better to focus on raising them. Hold cages with sieve-type mesh nets for temporary cages, and place them in areas with small winds and waves. The benefits of centralized holdings are as follows: First, it is convenient for feeding and management; second, it is able to eliminate the fish fry that have been caught and increase the survival rate of the culture. Holding time is generally about 10 days.
4, daily management. The day-to-day management of C. oligoides is similar to that of other fish. One is to measure the growth of records, the factors of the sea conditions, to calculate the daily feeding amount, to check the cages, and to arrange the nets, to reinforce the resistance, to clean the cages, and to replace the nets. Boxes and so on.
In addition, when the gap between the fish body size is too large in the aquaculture process, it is necessary to carry out culture by size. In this way, it is beneficial for small individual fish to obtain sufficient food.
5, feeding. Cultivated Ctenopharyngodons are carnivorous fish, mainly feeding on crustaceans, mollusks, and small fish. In the culture, the fry stage is to feed small fish and shrimp into meat mud, and the feeding rate should be more than four times per day. With the growth of the fish, the number of feedings can be gradually reduced, and individual foods can be increased accordingly.
However, it is swallowed to eat, so the individual should not be more than its caliber. The daily feeding amount depends on the fish's appetite and feeding status. Due to the fierce appetite of the eels, the feeding of the eel can catch water on the surface when feeding, and the feeding can be stopped when the predator has eased.
Third, the harvest. The lower limit of the suitable temperature of the scallop is 9.5°C, and when the water temperature drops to 8°C, a large number of deaths will occur. Therefore, it is impossible to overwinter in the shallow sea cage in the coastal south of Zhejiang. Must harvest before the Spring Festival.
Gracilaria japonica cage culture technology
The hornbill fish is a member of the genus Erythrophagoidea. Because of the similarity between the silvery gray fish and the silver fish, the masses call it "white."
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