Intestinal pathogens suspected to be Escherichia coli, Shigella, and Salmonella were further identified by phage and serological tests. For the strain identified as Escherichia coli, the pathogenic Escherichia coli was further identified by serology, and the toxigenic Escherichia coli 122 was ...more...
For the sake of cost control, or the development of new business, it is inevitable that in the printing companies, raw material testing and use problems are inevitably encountered. There are many aspects to pay attention to here. The following is a brief description. 1 Analysis For new business, ...more...
installation steps According to the order of installation, it is divided into three parts: the combination of the door frame, the placement of the door hole, and the entry of the door leaf. First, the door frame installation method The 30MM thick door frame can be used for ...more...
Mitochondria are organelles independent of the nucleus, equivalent to the energy generators of cells. It has its own DNA (deoxyribonucleic acid) and is inherited only by the mother. Once a mitochondrial gene mutation occurs, it may lead to mental disorders, blindness, epilepsy, dementia and death. ...more...
When calibrating the concentration of the standard titration solution according to the "GB / T601-2002 Preparation of Chemical Reagent Standard Titration Solution", two people are required to carry out the experiment, each doing four parallels. The relative value of the critical range [CrR ...more...
With the development of science and technology, printers have become indispensable equipment for our work and study. If it fails, it will cause great inconvenience to our life or office. However, unconsciously, the hottest season of the year has already come quietly. Summer is hot and rainy. At th ...more...
Editor's note: Spiral plate heat exchanger is a high-efficiency heat exchanger equipment, suitable for vapor-vapor, vapor-liquid, liquid-liquid, heat transfer to liquid. It is suitable for industries such as chemistry, petroleum, solvent, medicine, food, light industry, textile, metallurgy, st ...more...