dic_2 = {'halflife': c, 'variation_coefficient': vc_c, 'species': species[0], 'ncbi_taxonomy_id': species[1],
                    'unit': 's', 'reference': [{'doi': '10.1093/nar/gkt1150'}], 'growth_medium': 'M9 minimal medium supplemented with glucose',
                    'ordered_locus_name': oln, 'doubling_time': {'value': 2.3, 'unit': 'h'}}