Difference between revisions of "Team:HUST-China/Safety"

For practical projects, especially involving synthetic biology, safety should be attached great importance to. This year, we designed an electricity generation device based on microbial co-culture. In terms of experimental design, experimental operation and so on, we fully considered their safety and implement safety at every step.

1. Safe Project Design

Safe strains and safe gene products were selected to complete our project design. The products of the genes transferred into the microorganisms are all determined and do not cause any known diseases to humans, animals and plants. Any microorganisms involved in our project is encapsulate in electricity generation device. So far, the devise can recharge the phone, and in the future, electricity generation based on microbial co-culture may become a new choice of electricity production.

a. Rhodopseudomonas palustris

Rhodopseudomonas palustris(DSM5859) is one of the protagonists in our project. It is responsible for converting optical energy into chemical energy with lactic acid producing and secreting lactic acid for the electricity production of Shewanella. Rhodopseudomonas palustris is commonly used in sewage treatment. It is a kind of microorganism being harmless to the human body and environmentally friendly.

b.Cyanobacteria

In our project, cyanobacteria are used as a control strain to compare the electricity production efficiency of Shewanella when cyanobacteria and Rhodopseudomonas palustris are respectively co-cultured with Shewanella. The cyanobacteria selected is Synechocystis sp. PCC6803, which is widely used in algae research as a model organism. Because of its long growth cycle, strict growth conditions, and special culture medium, we can control its growth in many ways to avoid pollution.

c. Shewanella

Shewanella is the key species for optical energy conversion, which can consume lactate and reduce metal to produce electricity. The Shewanella oneidensis MR-1 we used can be used for wastewater treatment [1]. For the time being, there are no reports of diseases with it.

2. Safe Lab Work

Our team also pay special attention to safety issues during the experimental operation. New members are required to undergo experimental training from Principle Investigators, graduate students and previous team members in our lab before conducting experiments. Experimental training includes standard experiment operations, safety regulations of equipment usage and good practice rules in the polluted area. In addition, undergraduates have to use secondary equipment with company of a graduate student. In our project, microbial co-culture used to generate electricity must be sterilized at 121 ℃ for 25 minutes before disposal. Based on previous experience, we highlight the following points in experimental safety:

1.polluted area must be isolated from the nomal bench. Experimenters are required to wear lab coat and polyvinyl chloride plastic gloves before entering.

2.Toxic reagents must be collected specially.

3.Volatile chemicals involved experiment must be operated in the fuming cupboard.

4.Laboratory appliance must be sterilized before and after use.

5.Maintaing of complex equipment must be in the charge of staff.