Protoporphyrin IX (PPIX), a fundamental precursor in the synthesis of heme and chlorophyll, plays a vital role in the biological metabolism and biogeochemical cycling in the ocean. PPIX has previously been identified in humans, animals, and plants, while so far as we know, there is no measurements until now regarding its contents in microbes, and especially in marine phytoplankton and bacteria. Here, for the first time, we rep...

Vibrio vulnificus is an important bacterial pathogen that causes serious infections in fish and is also highly pathogenic to humans. Many effective detection methods targeting this pathogen have previously been designed, but many of these methods are time‐consuming, complicated and expensive. Thus, these approaches cannot be widely used by small aqacultural concerns. Although DNA aptamers have been used to detect pathogenic ba...