Development and Reform Commission: Non-ferrous metal industry operation from January to September 2020
Time of Update: 2022-04-03
According to data from China Nonferrous Metals Industry Association, from January to September 2020, the average domestic copper spot price was 46,923 yuan/ton, down 1.
4 percentage points from January to August; the average aluminum spot price was 13,703 yuan /Ton, down 1.
Determination of 9 Nitroimidazole Residues in Royal Jelly and Lyophilized Powder by Liquid Chromatography-Tandem Mass Spectrometry
Time of Update: 2021-09-30
2 Principle of the methodRoyal jelly and lyophilized powder contains metronidazole, dimenidazole, tinidazole, lonidazole, tenidazole, isopropnidazole, as well as hydroxylated metronidazole, hydroxylated isoprenidazole, 2- Hydroxymethyl-1-methylated-5-nitroimidazole 9 kinds of nitroimidazole drug residues, dissolved in sodium acetate buffer, liquid-liquid extraction with ethyl acetate, after rotary evaporation to dryness, add carbon tetrachloride And acid-containing aqueous solution, centrifuged to take the upper solution, liquid chromatography-tandem mass spectrometry determination .
The influence factors and construction methods of bauxite-based spray coating
Time of Update: 2020-09-05
With the increase of heat treatment temperature, silicon micro-powder is gradually transformed into liquid phase, which is conducive to the filling of pores, and under the effect of surface tension, the distance between the sample particles is closer, so the shrinkage of the material increases.
Star Lake Technology: Net profit of 20.24 million yuan, to achieve a profit-making
Time of Update: 2020-06-30
March 25, 2014, Guangdong Zhaoqing Xinghu Biotech Co., Ltd released its 2013 annual report, with annual operating income of 903 million yuan, down 17.27% YoY, and a net profit attributable to shareh
A new healthy image of the dough sticks no aluminum oil sticks bulking agent will replace alum
Time of Update: 2009-07-07
On July 2, Angel yeast Co., Ltd announced that angel had no aluminum stick bulking agent listed in Beijing headquarters base The product will completely replace alum in the production process of oil s