-
The price of mixed nucleic acid testing in Shandong has been lowered again: the price standard of 4 yuan will be implemented from the 26th
Time of Update: 2022-05-17
In order to meet the requirements of the new coronavirus pneumonia epidemic prevention and control situation and reduce the burden on the public, on the basis of effectively reducing the price
-
4-hydroxyphenylacetic acid
Time of Update: 2022-04-07
2)Inspect ultraviolet light (254nm) and 10% sulfuric acid ethanol solution, heated at 105°C until the color is clear, inspect under sunlight2.
-
Test method for mixed catalyst solution of cobalt acetate, manganese acetate and hydrobromic acid (4)
Time of Update: 2021-12-11
4. 2 Drawing standard curveWeigh cobalt acetate tetrahydrate , manganese acetate tetrahydrate , hydrobromic acid, and water according to the mass fraction ratio of each component in Table 2 , to the nearest 0.
-
Oxalic acid for industrial use (4)
Time of Update: 2021-11-23
7. 3 The number of oxalic acid sampling units for industrial use shall be determined in accordance with 7.
-
Industrial Sebacic Acid (4)
Time of Update: 2021-11-23
6. 2 There should be an obvious mark on the packaging bag: indicate the name of the manufacturer, product name, trademark, model, production date, batch number, grade, and net weight .
-
Glacial acetic acid for industrial use (4)
Time of Update: 2021-11-23
1. 5 Result calculationThe mass fraction w 2 of formic acid , the value is expressed in %, calculated according to formula (2): Where:V 0 —The value of the volume of sodium thiosulfate standard titration solution (4.
-
Formic acid for industrial use (4)
Time of Update: 2021-11-23
> (SO 4 ) standard solution: 0. 1 mg/mL . >5. 8. 2. 2 Hydrochloric acid
-
Product standards and uses of 1-naphthol-4-sulfonic acid
Time of Update: 2021-09-05
2. Production principle4-aminonaphthalene sulfonate and sodium bisulfite undergo 1,4-addition in the presence of hydrochloric acid, and the adduct is hydrolyzed in alkaline to obtain 1-naphthol-4-sulfonic acid disodium salt, which is finally obtained by acidification 1-Naphthol-4-sulfonic acid .
-
Product standards and uses of 1-amino-4-bromoanthrone-2-sulfonic acid
Time of Update: 2021-08-28
0002g), carefully transfer it into a 500mL round-bottomed flask, add 75mL concentrated sulfuric acid , and heat to dissolve it on a boiling water bath .
-
Production principle and process flow of 1-amino-4-bromoanthrone-2-sulfonic acid
Time of Update: 2021-08-28
After reaching the end point, add about 88kg of powdered sodium carbonate for neutralization, then distill under reduced pressure for 1 hour, and then distill with direct steam to recover o-dichlorobenzene .
-
Production process and product use of 1-amino-2-naphthol-4-sulfonic acid
Time of Update: 2021-08-28
℃, dilute 10 times with diazonium salt and test solution On the blank filter paper, no light orange-red color is produced at the wet circle contact area, but light yellow as the end point . >
-
Product performance and production principle of 1-amino-2-naphthol-4-sulfonic acid
Time of Update: 2021-08-28
Amino-2-naphthol-4-sulfonic acid (1-amino-2-naphthol -4-sulfonic acid) , also known as 1,2,4-acid of the formula C
-
Production process and product use of 4-bromonaphthalene-1,8-dicarboxylic acid anhydride
Time of Update: 2021-08-14
6. Production processFirst, add 2000 parts of water to the bromination reactor, then add 60 parts of potassium hydroxide , add 160 parts of 1,8-naphthalenedicarboxylic acid anhydride after dissolution, and slowly add 267 parts of bromine dropwise after stirring .
-
Production process and product use of 2-chloro-4-nitrobenzoic acid
Time of Update: 2021-08-14
Then transfer the reaction materials to a washing kettle pre-added with hydrochloric acid and hot water, keep the room temperature above 65°C, stir for 30 minutes, and let stand for 2 hours .
-
"The Lancet": There are only 4 steps from "high uric acid" to "tophi"!
Time of Update: 2021-05-09
or renal impairment [estimated glomerular filtration rate (eGFR) <90 ml/min], high blood pressure, impaired glucose tolerance or diabetes, dyslipidemia, obesity, coronary heart disease, stroke, cardiac insufficiency, start immediately Drug treatment
-
Apheducinated lactic acid bacteria drinks are said to be equivalent to sugar water costs less than 1/4 of the price
Time of Update: 2021-02-08
not be less than 1 million . Consumers only drink this lactic acid bacteria products, lactic acid bacteria in the human body's large intestine rapid reproduction, while producing acid, thus effectively inhibiting the reproduction and reproduction
-
Dalian CDC: 24 cases of this outbreak infected people after more than 4 nucleic acid screening test positive
Time of Update: 2021-01-13
On the afternoon of January 7, Dalian held a press conference on epidemic prevention and control, Meng Jun, deputy director of the Dalian CDC, said that from December 15, 2020 to January 7, 2021, Dalian City reported 82 cases of local infection
-
Priut Pharmaceuticals' application for a class 4 generic listing of thioponic acid tebutalin was accepted.
Time of Update: 2020-10-30
emphysema, or other lung disorders. Table 1: Currently under review for the listing of Tebutalin inhalants Source: Minet MED2.0 China Drug Review Database is currently approved by the domestic pharmaceutical companies have Haizheng Pharmaceuticals
-
Priut Pharmaceuticals' application for a class 4 generic listing of thioponic acid tebutalin was accepted.
Time of Update: 2020-10-27
: Currently under review for the listing of Tebutalin inhalants Source: Minet MED2.0 China Drug Review Database Currently approved domestic pharmaceutical companies have Haizheng Pharmaceuticals' sulphuric acid Tebutalin inhalation powder spray, Sichuan
-
Nat Commun: Short-chain fatty acids may weaken the immunotherapy effect of CTLA-4 tumors.
Time of Update: 2020-10-20
Short-chain fatty acids are one of the important metabolites of gut microorganisms, and as signaling molecules affect a series of host activities. short-chain fatty acids (short-chain fatty acids, SCFA), also known as volatile fatty acids
