Crude oil and pyrene degradation by halotolerant fungi Embellisia sp. KJ59 and Alternaria sp. KJ66 isolated from saline soils

2021 ◽  
pp. 1-12
Author(s):  
Kian Jenab ◽  
Hamid Moghimi ◽  
Ehsan Azin
Keyword(s):  
Crude Oil ◽  
Saline Soils ◽  
Pyrene Degradation ◽  
Alternaria Sp

Pyrene Degradation byBacillus pumilusIsolated from Crude Oil Contaminated Soil

2011 ◽  
Vol 31 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Purnima Khanna ◽  
Dinesh Goyal ◽  
Sunil Khanna
Keyword(s):  
Crude Oil ◽  
Contaminated Soil ◽  
Pyrene Degradation

scholarly journals Surface activity of salt-tolerant Serratia spp. and crude oil biodegradation in saline soil

2012 ◽  
Vol 58 (No. 9) ◽  
pp. 412-416 ◽  
Author(s):  
T. Wu ◽  
W.J. Xie ◽  
Y.L. Yi ◽  
X.B. Li ◽  
H.J. Yang ◽  
...  
Keyword(s):  
Surface Tension ◽  
Salt Tolerance ◽  
Crude Oil ◽  
Surface Activity ◽  
High Surface ◽  
Saline Soils ◽  
Surface Tension Reduction ◽  
Oil Biodegradation ◽  
Soil Solutions ◽  
Nacl Concentration

An ideal strain for crude oil degradation in saline soils would be one with high salt-tolerance. A novel bacterial strain, Serratia sp. BF40, was isolated from crude oil contaminated saline soils. Its salt-tolerance, surface activity and ability to degrade crude oil in saline soils were evaluated. It can grow in liquid culture with NaCl concentration less than 6.0%. Its surface activity characterized as an efficient surface tension reduction, was significantly affected by salinity above 2.0%. BF40 inoculation could decrease surface tension of soil solutions and facilitate crude oil removal in soils with 0.22–1.20% salinity, but the efficiency was both significantly lower than its biosurfactant addition. The BF40 strain has a high potential for biodegradation of crude oil contaminated saline soils in view of its high surface activity and salt-tolerance, which is the first report of biosurfactant producing by the genus Serratia for petroleum degrading. We suggest that biosurfactant addition is an efficient strategy. Simultaneously, the growing status of the strain and how to boost its surface activity in saline soils should deserve further studies in order to achieve a continuous biosurfactant supply.

scholarly journals Extra-Heavy Crude Oil Degradation by Alternaria sp. Isolated from Deep-Sea Sediments of the Gulf of Mexico

2021 ◽  
Vol 11 (13) ◽  
pp. 6090
Author(s):  
Lucia Romero-Hernández ◽  
Patricia Velez ◽  
Itandehui Betanzo-Gutiérrez ◽  
María Dolores Camacho-López ◽  
Rafael Vázquez-Duhalt ◽  
...  
Keyword(s):  
Carbon Source ◽  
Gulf Of Mexico ◽  
Crude Oil ◽  
Deep Sea ◽  
Sole Carbon Source ◽  
The United States ◽  
Heavy Crude Oil ◽  
Deep Sea Sediments ◽  
Alternaria Sp ◽  
Heavy Crude

The Gulf of Mexico (GoM) is an important source of oil for the United States and Mexico. There has been growing interest, particularly after the Deepwater Horizon oil spill, in characterizing the fungal diversity of the GoM and identifying isolates for use in the bioremediation of petroleum in the event of another spill. Most studies have focused on light crude oil bioremediation processes, while heavy crude oil (HCO) and extra-heavy crude oil (EHCO) have been largely ignored. In this work, we evaluated the ability of fungal isolates obtained from deep-sea sediments of the Mexican economic exclusive zone (EEZ) of the GoM to degrade HCO (16–20° API) and EHCO (7–10° API). Alternaria sp., Penicillium spp., and Stemphylium sp. grew with HCO as the sole carbon source. Remarkably, Alternaria sp. was the only isolate able to grow with EHCO as the sole carbon source, degrading up to 25.6% of the total EHCO and 91.3% of the aromatic fraction, as demonstrated by gas chromatography analysis of the saturate, aromatic, and polar fractions. These findings proved to be significant, identifying Alternaria sp. as one of the few fungi reported so far capable of degrading untreated EHCO and as a suitable candidate for bioremediation of EHCO in future studies.

Remediation of saline soils contaminated with crude oil using the halophyte Salicornia persica in conjunction with hydrocarbon-degrading bacteria

2018 ◽  
Vol 219 ◽  
pp. 260-268 ◽  
Author(s):  
Ali Ebadi ◽  
Nayer Azam Khoshkholgh Sima ◽  
Mohsen Olamaee ◽  
Maryam Hashemi ◽  
Reza Ghorbani Nasrabadi
Keyword(s):  
Crude Oil ◽  
Saline Soils ◽  
Degrading Bacteria

Ultrastructure of Melanin Formation in Curvularia sp., Alternaria sp., and Drechslera Sorokiniana

1977 ◽  
Vol 35 ◽  
pp. 398-399
Author(s):  
M. H. Wheeler ◽  
W. J. Tolmsoff ◽  
A. A. Bell
Keyword(s):  
Potassium Phosphate ◽  
Thielaviopsis Basicola ◽  
Wild Type ◽  
Potassium Phosphate Buffer ◽  
Transmission Microscopy ◽  
Electron Transmission ◽  
Melanin Formation ◽  
Before And After ◽  
Alternaria Sp ◽  
Electron Transmission Microscopy

(+)-Scytalone [3,4-dihydro-3,6,8-trihydroxy-l-(2Hj-naphthalenone] and 1,8-di- hydroxynaphthalene (DHN) have been proposed as intermediates of melanin synthesis in the fungi Verticillium dahliae (1, 2, 3, 4) and Thielaviopsis basicola (4, 5). Scytalone is enzymatically dehydrated by V. dahliae to 1,3,8-trihydroxynaphthalene which is then reduced to (-)-vermelone [(-)-3,4- dihydro-3,8-dihydroxy-1(2H)-naphthalenone]. Vermelone is subsequently dehydrated to DHN which is enzymatically polymerized to melanin.Melanin formation in Curvularia sp., Alternaria sp., and Drechslera soro- kiniana was examined by light and electron-transmission microscopy. Wild-type isolates of each fungus were compared with albino mutants before and after treatment with 1 mM scytalone or 0.1 mM DHN in 50 mM potassium phosphate buffer, pH 7.0. Both chemicals were converted to dark pigments in the walls of hyphae and conidia of the albino mutants. The darkened cells were similar in appearance to corresponding cells of the wild types under the light microscope.

An Empirical Investigation of Factors Affecting Stock Prices in Vietnam

2014 ◽  
pp. 74-89 ◽  
Author(s):  
Vinh Vo Xuan
Keyword(s):  
Exchange Rates ◽  
Crude Oil ◽  
Foreign Exchange ◽  
Stock Prices ◽  
Global Financial Crisis ◽  
Oil Prices ◽  
Foreign Exchange Rates ◽  
Factors Affecting ◽  
Crude Oil Prices ◽  
Before And After

This paper investigates factors affecting Vietnam’s stock prices including US stock prices, foreign exchange rates, gold prices and crude oil prices. Using the daily data from 2005 to 2012, the results indicate that Vietnam’s stock prices are influenced by crude oil prices. In addition, Vietnam’s stock prices are also affected significantly by US stock prices, and foreign exchange rates over the period before the 2008 Global Financial Crisis. There is evidence that Vietnam’s stock prices are highly correlated with US stock prices, foreign exchange rates and gold prices for the same period. Furthermore, Vietnam’s stock prices were cointegrated with US stock prices both before and after the crisis, and with foreign exchange rates, gold prices and crude oil prices only during and after the crisis.

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