Economic Daily: Reduction of soybean meal instead of promoting food conservation and consumption reduction
Time of Update: 2022-11-15
"Soybean meal reduction and substitution is not only a passive choice to cope with the uncertainty of external supply, but also an initiative to promote high-quality development, which is of great significance to farmers to save costs, feed producers to save feed, the whole industry to increase efficiency, and the whole society to safety.
Determination of Streptomycin Residues in Aquatic Products - High Performance Liquid Chromatography (2
Time of Update: 2022-08-19
The trichloroacetic acid solution was extracted again with the above method, and the obtained supernatant was combined and filtered, collected into a 25 mL volumetric flask, added 2 mL of sodium heptanesulfonate solution (4.
Petroleum products and hydrocarbon compounds-determination of sulfur content Wickbold combustion method (7
Time of Update: 2021-12-15
050mol/L sulfuric acid standard solution into a 1000mL volumetric flask, and dilute to the mark with water .
1), and stir with an electromagnetic stirrer for 6 minutes , Constant temperature for 4 minutes, and then use a 50mm cuvette to measure the absorbance with water as the reference liquid, and calculate the (BA) value .
Research on the Extinction Effect of Aromatic Amine and Zinc Ion Complex in Powder Coatings
Time of Update: 2021-06-16
This paper proposes the following hypothesis for its extinction structure model: "Epoxy resin curing agent + zinc ion" structure model can be used as epoxy The resin powder coating is matt, and according to this hypothesis, two aromatic amines, 4,4-diaminophenylmethane (DDM), 4,4-diaminodiphenylsulfone (DDS) and zinc chloride complexes were synthesized, and compared The extinction effect of two aromatic amines and corresponding zinc salt complexes with ZMBT .
Water-based polyurethane coating formulation and process steps
Time of Update: 2020-12-27
process steps: polyol-carpic acid solution preparation, according to the formula will be new glycol, benzodiaxyl, DMPA, xylene, toluene into the reactor stirring, heating up to 80 degrees C, after the completion of dissolution, heating up to 148 degrees C reflow dehydration to transparent, filter out the material backup.
Information Circular on Food Safety Supervision and Sampling of Zhejiang Market Supervision Administration (No. 33 of 2020
Time of Update: 2020-12-10
According to the national standards of food safety inspection and determination: sampling inspection qualified 450 batches, unqualified 7 batches (see annex), non-conforming items related to microbial pollution, quality indicators are not up to standard, agricultural and veterinary drug residues exceeded the standard, food additives exceeded the standard.
Coating technology: preparation technology of phase change energy storage thermal insulation mortar
Time of Update: 2020-04-03
Key tips: 1 Formula composition: Raw material name: w /% Portland cement (42.5R), 30-35 fly ash (grade II), 5-10 calcium bentonite (300 mesh), 2-3 redispersible rubber powder (ri551z), 2-3 hydroxyprop