cluster coelicolor Streptomyces peucetius caesius cluster coelicolor Streptomyces peucetius caesius expressed in the strains M1152, var. , and Streptomyces avermitilis SUKA22 produced the general intermediary labda-8(17), 12(E),14-triene [(E)- S. coelicolor S. avermitilis biformene]. Besides (E)-biformene, M1152 and SUKA22 produced two and three different labdane-type diterpenoids, underlying the relevance of the genetic background of the Streptomyces host in product formation.

Hackbusch, S., Noirungsee, N., Viamonte, J., Sun, X., Bubenheim, P., Kostka, J.E., Müller, R., Liese, A., 2020. Rhodococcus Influence of pressure and dispersant on oil biodegradation by a newly isolated strain from deep- sea sediments of the Gulf of Mexico. Marine Pollution Bulletin 150, 110683.

http://www.sciencedirect.com/science/article/pii/S0025326X19308392 Rhodococcus A new strain, capable of degrading crude oil, was isolated from the Gulf of Mexico deep-sea sediment and was investigated for its biodegradation characteristics under atmospheric as well as under deep- sea pressure (1500 m=15MPa). Additionally, the effect of dispersant (Corexit EC9500A) addition was studied. Rhodococcus sp. PC20 was shown to degrade 60.5 ± 10.7% of the saturated and aromatic fraction of crude oil at atmospheric pressure and 74.2 ± 9.1% at deep - sea level pressure within 96 h. D egradation rates, especially for monoaromatic hydrocarbons, were significantly higher at elevated pressure compared to atmospheric pressure. This study found a growth inhibiting effect at a dispersant to oil ratio of 1:100 and higher. This effect of the dispersant was enhanced when elevated pressure was applied.

Hackley, P.C., Araujo, C.V., Borrego, A.G., Bouzinos, A., Cardott, B.J., Carvajal-Ortiz, H., López Cely, M.R., Chabalala, V., Crosdale, P.J., Demchuk, T.D., Eble, C.F., Flores, D., Furmann, A., Gentzis, T., Gonçalves, P.A., Guvad, C., Hámor-Vidó, M., Jelonek, I., Johnston, M.N., Juliao-Lemus, T., Kalaitzidis, S., Knowles, W.R., Kus, J., Li, Z., Macleod, G., Mastalerz, M., Menezes, T.R., Ocubalidet, S., Orban, R., Pickel, W., Ranasinghe, P., Ribeiro, J., Gómez Rojas, O.P., Ruiz-Monroy, R., Schmidt, J.S., Seyedolali, A., Siavalas, G., Suarez-Ruiz, I., Vargas, C.V., Valentine, B.J., Wagner, N., Wrolson, B., Jaramillo Zapata, J.E., 2020. Testing reproducibility of vitrinite and solid bitumen reflectance measurements in North American unconventional source-rock reservoir petroleum systems. Marine and Petroleum Geology 114, 104172.

http://www.sciencedirect.com/science/article/pii/S0264817219306269 An interlaboratory study (ILS) was conducted to test reproducibility of vitrinite and solid bitumen reflectance measurements in six mudrock samples from United States unconventional source-rock reservoir petroleum systems. Samples selected from the Marcellus, Haynesville, Eagle Ford, Barnett, Bakken and Woodford are representative of resource plays currently under exploitation in North America. All samples are from marine depositional environments, are thermally mature (T >445 °C) and have moderate to high organic matter max content (2.9 - 11.6 wt% TOC). Their organic matter is dominated by solid bitumen, which contains intraparticle nano-porosity. Visual evaluation of organic nano-porosity (pore sizes < 100 nm) via SEM suggests that intraparticle organic nano-pores are most abundant in dry gas maturity samples and less abundant at lower wet gas/condensate and peak oil maturities. Samples were distributed to ILS participants in forty laboratories in the Americas, Europe, Africa and Australia; thirty-seven independent sets of results were received. Mean vitrinite reflectance (VR ) values from all ILS participants range from 0.90 to 1.83% whereas mean solid bitumen o reflectance (BR ) values range from 0.85 to 2.04% (no outlying values excluded), confirming the thermally o mature nature of all six samples. Using multiple statistical approaches to eliminate outlying values, we evaluated reproducibility limit R, the maximum difference between valid mean reflectance results obtained on the same sample by different operators in different laboratories using different instruments. Removal of outlying values where the individual signed multiple of standard deviation was >1.0 produced lowest R values, generally ≤0.5% (absolute reflectance), similar to a prior ILS for similar sam ples. Other traditional approaches to outlier removal (outside mean ± 1.5*interquartile range and outside F10 to F90 percentile range) also produced similar R values. Standard deviation values < 0.15*(VR or BR ) reduce R and should be a o o requirement of dispersed organic matter reflectance analysis. After outlier removal, R values were 0.1% - 0.2% for peak oil thermal maturity, about 0.3% for wet gas/condensate maturity and 0.4% - 0.5% for dry gas maturity. That is, these R values represent the uncertainty (in absolute reflectance) that users of vitrinite and solid bitumen reflectance data should assign to any one individual reported mean reflectance value from a similar