What is E. coli DH5 Alpha?

What is E. coli DH5 Alpha? DH5-Alpha Cells are E. coli cells engineered by American biologist Douglas Hanahan to maximize transformation efficiency. They are defined by three mutations: recA1, endA1 which help plasmid insertion and lacZΔM15 which enables blue white screening. What is the difference between DH5 alpha and BL21? Read more…

What is public health safety?

What is public health safety? Public Health and Safety is generally defined as the science of the anticipation, recognition, evaluation and control of hazards arising in or from the workplace that could impair the health and well-being of public, taking into account the possible impact on the surrounding communities and Read more…

Wo lebt die Germanen?

Wo lebt die Germanen? Die Germanen waren nicht nur in weiten Teilen des heutigen Deutschlands heimisch, sondern siedelten großflächig in Mittel- und Nordeuropa an Nord- und Ostsee. Sie waren kein einheitliches Volk, deshalb ist es schwierig, von der germanischen Lebensweise allgemein zu sprechen. Was war typisch für die Germanen? Die Read more…