Abstract: A method and device for issuing an identity certificate to a blockchain node in a blockchain network includes issuing a first identity certificate to a first terminal. a second identity certificate issuance request that is from the first terminal and that is made by using the first identity certificate is received and a second identity certificate is issued to the first terminal, which forwards the second identity certificate to a second terminal. A third identity certificate issuance request that is from the second terminal and that is made by using the second identity certificate is received and a third identity certificate is issued to the second terminal, which forwards the third identity certificate to a third terminal.

Abstract: The present invention, among other things, provides technologies for detecting and/or quantifying nucleic acids in cells, tissues, organs or organisms. In some embodiments, through sequential barcoding, the present invention provides methods for high-throughput profiling of a large number of targets, such as transcripts and/or DNA loci.

Abstract: A separatory funnel for the work up of chemical reactions, extraction or separation of liquid phases. The separatory funnel has multi-functional features, which can be used as regular separatory funnels, Erlenmeyer flasks, and filter funnels. A method is also provided of separating a mixture of at least two immiscible liquids with solids or precipitates so that the clear liquids can be separated.