Effects of nutrients and temperature on lipid and fatty acid production in the diatomHantzshia DI-60

Applied Biochemistry and Biotechnology - The ability of microalgae to accumulate considerable amounts of lipids has led to an increase in research on the cultivation of these organisms for the...     

Methanol Suppression of Trichloroethylene Degradation byMethylosinus trichosporium (OB3b) and Methane-Oxidizing Mixed Cultures

The effect of methanol on trichloroethylene (TCE) degradation by mixed and pure methylotrophic cultures was examined in batch culture experiments. Methanol was found to relieve growth inhibition ofMethylosinus trichosporium (OB3b) at high (14 mg/L) TCE concentrations. Degradation of TCE was determined by both radiolabeling and gas chromatography techniques. When cultures were grown on methanol over 10 to 14 d with 0.3 mg/L TCE, OB3b degraded 16.89 ±0.82% (mean± SD) of the TCE, and a mixed culture (DT type II) degraded 4.55±0.11%. Mixed culture (JS type I) degraded 4.34±0.06% of the TCE. When grown on methane with 0.3 mg/L TCE, 32.93±2.01% of the TCE was degraded by OB3b, whereas the JS culture degraded 24.3 ±1.38% of the TCE, and the DT culture degraded 34.3 ±2.97% of the TCE. The addition of methanol to cultures grown on methane reduced TCE degradation to 16.21 ±1.17% for OB3b and to 5.08±0.56% for JS. Although methanol reduces the toxicity of TCE to the cultures, biodegradation of TCE cannot be sustained in methanol-grown cultures. Since high TCE concentrations appear to inhibit methane uptake and growth, we suggest the primary toxicity of TCE is directed towards the methane monooxygenase.     

Preparation of dye-sensitized solar cells using template free TiO2 nanotube arrays for enhanced power conversion

Journal of Sol-Gel Science and Technology - By using the vertically aligned ZnO nanorod arrays (NRAs), TiO2 nanoparticles attached ZnO nanorods (TiO2@ZnO) and TiO2 nanotube arrays (NTAs) were...     

The effects of nutrients and temperature on biomass,growth, lipid production,and fatty acid composition ofCyclotella cryptica Reimann,Lewin, and Guillard

Applied Biochemistry and Biotechnology - Batch cultures ofCyclotella cryptica Reimann, Lewin, and Guillard were grown at two different nutrient (nitrogen/silica) levels and at two different...     

Experimental investigation on the effectiveness of MHTHS using different metal oxide-based nanofluids

Journal of Thermal Analysis and Calorimetry - In recent times, the mini heat sink is suggested for cooling the miniature components employed in several engineering applications. In the present...     

Experimental investigation on the heat transfer performance of MHTHS using ethylene glycol-based nanofluids

Journal of Thermal Analysis and Calorimetry - Energy storage plays an important role in improving the applicability of a wide range of energy systems. Buildings could be considered as a desirable...     

Environmental control of lipids and fatty acid production in the diatomNavicula saprophila

The unique ability of microalgae to accumulate large amounts of lipids has led to an increase in the research on the cultivation of these organisms for the production of fuels. This paper describes the accumulation of cellular lipids by the diatom,Navicula saprophila, as a result of culture management strategies. The cells were grown in two different nutrient concentrations (nitrogen and silica) maintained at 20° and 30°C. The biomass, lipids, and fatty acids were measured. Biomass yield was higher in a nutrient (nitrogen/silica) nonstress treatment; however, the production of lipids was enhanced in a nutrient stress medium at 30 °C. The influence of the environmental conditions on the distribution of fatty acids was also observed.