scholarly journals Susceptibility of the Algal Toxin Microcystin-LR to UV/Chlorine Process: Comparison with Chlorination

2018 ◽  
Vol 52 (15) ◽  
pp. 8252-8262 ◽  
Author(s):  
Xiaodi Duan ◽  
Toby Sanan ◽  
Armah de la Cruz ◽  
Xuexiang He ◽  
Minghao Kong ◽  
...  
Keyword(s):  
Process Comparison ◽  
Algal Toxin

scholarly journals Causality assessment in drug-induced liver injury using a structured expert opinion process: Comparison to the Roussel-Uclaf causality assessment method

Hepatology ◽  
2010 ◽  
Vol 51 (6) ◽  
pp. 2117-2126 ◽  
Author(s):  
Don C. Rockey ◽  
Leonard B. Seeff ◽  
James Rochon ◽  
James Freston ◽  
Naga Chalasani ◽  
...  
Keyword(s):  
Liver Injury ◽  
Expert Opinion ◽  
Causality Assessment ◽  
Assessment Method ◽  
Drug Induced ◽  
Drug Induced Liver Injury ◽  
Process Comparison

scholarly journals Rhamnolipid and lipase production by Pseudomonas aeruginosa san-ai: the process comparison analysis by statistical approach

2013 ◽  
Vol 67 (4) ◽  
pp. 677-685 ◽  
Author(s):  
Sonja Jakovetic ◽  
Zorica Knezevic-Jugovic ◽  
Sanja Grbavcic ◽  
Dejan Bezbradica ◽  
Natasa Avramovic ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Lipase Activity ◽  
Sunflower Oil ◽  
Hydrolytic Enzymes ◽  
Tween 80 ◽  
Lipase Production ◽  
Fermentation Time ◽  
Process Comparison ◽  
Central Composite Experimental Design ◽  
Oil Concentration

Pseudomonas aeruginosa was repeatedly reported as powerful producer of rhamnolipid biosurfactants as well as producer of hydrolytic enzymes. In this study effects of four fermentation factors were evaluated using response surface methodology and experiments were performed in accordance with a four-factor and five-level central composite experimental design. Investigated factors were: fermentation temperature, time of fermentation, concentration of sunflower oil and concentration of Tween? 80. The most important finding was that regression coefficients of the highest values were those that describe interactions between factors and that they differ for lipase and rhamnolipid production, which were both investigated in this study. Production of both metabolites was optimized and response equations were obtained, making it possible to predict rhamnolipid concentration or lipase activity from known values of the four factors. The highest achieved rhamnolipid concentration and lipase activity were 138 mg dm-3 (sunflower oil concentration 0.8 %, Tween? 80 concentration 0.05 %, temperature 30?C, and fermentation time 72 h) and 11111 IU dm-3(sunflower concentration of 0.4 %, Tween? 80 concentration of 0.05 %, temperature of 30?C, and fermentation time of 120 h), respectively.

scholarly journals Reduction of chromium (VI) from aqueous solution by biomass of Cladosporium cladosporioides

2017 ◽  
Vol 76 (9) ◽  
pp. 2494-2502 ◽  
Author(s):  
María Teresa Garza-González ◽  
Jonathan Eduardo Ramírez-Vázquez ◽  
María de los Ángeles García-Hernández ◽  
María Elena Cantú-Cárdenas ◽  
Adriana Liñan-Montes ◽  
...  
Keyword(s):  
Reduction Process ◽  
Cladosporium Cladosporioides ◽  
Total Chromium ◽  
Isothermal Model ◽  
Process Comparison ◽  
Chromium Vi ◽  
Before And After ◽  
Effects Of Ph ◽  
Pseudo Second Order ◽  
Adsorption Reduction

Abstract The capacity of Cladosporium cladosporioides biomass for removal of Cr(VI) in aqueous solutions was evaluated. A 2 × 2 factorial experiment design was used to study the effects of pH and biomass doses. Lower pH values and larger biomass doses increased the capacity of C. cladosporioides biomass for removal of Cr(VI), reaching a reduction capacity of 492.85 mg g−1, a significantly higher value compared to other biomass reported. Cr(VI) removal kinetic rates followed a pseudo-second order model, like other fungal biomass reported previously. The apparent adsorption process was described well by the Freundlich isothermal model. However, determination of total chromium indicated that adsorption of Cr(VI) was followed by a redox reaction that released proportional quantities of Cr(III) into the experimental supernatant, suggesting a parallel adsorption-reduction process. Comparison of Fourier transform infrared spectroscopy spectra of C. cladosporioides biomass before and after the reduction process demonstrated the involvement of positively charged amino groups in the Cr(VI) adsorption-reduction process.

Process Comparison between Coaxial Powder Feeding and Squash Presenting Laser Cladding NiCoCrAlY Coatings

Applied laser ◽  
2015 ◽  
Vol 35 (1) ◽  
pp. 29-34
Author(s):  
冯君 Feng Jun ◽  
田宗军 Tian Zongjun ◽  
王东生 Wang Dongsheng ◽  
杨友文 Yang Youwen
Keyword(s):  
Laser Cladding ◽  
Process Comparison ◽  
Powder Feeding

scholarly journals Economy Assessment for the Chiral Amine Production with Comparison of Reductive Amination and Transamination Routes by Multi-Enzyme System

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1451
Author(s):  
Heyu Huo ◽  
Guangxiao Yao ◽  
Shizhen Wang
Keyword(s):  
Reductive Amination ◽  
Nadh Oxidase ◽  
Glucose Dehydrogenase ◽  
Economic Assessment ◽  
Building Blocks ◽  
Unit Price ◽  
Chiral Amine ◽  
Process Comparison ◽  
Amine Dehydrogenase

Chiral amines are key building blocks for pharmaceuticals. Economic assessment of commercial potential of bioprocesses is needed for guiding research. Biosynthesis of (S)-α-methylbenzylamine (MBA) was selected as case study. For transamination route, transaminase coupled with glucose dehydrogenase and lactate dehydrogenase catalyzed the reaction with NADH (Nicotinamide adenine dinucleotide) regeneration. Amine dehydrogenase coupled with NADH oxidase, which catalyzed the reductive amination process. Comparison of biosynthesis cost by reductive amination and transamination routes was carried out. Economic assessment based on the framework of cost analysis and preliminary process information revealed that cost is greatly dependent on enzyme price. The results indicated that enhancing the activity of amine dehydrogenase by 4–5 folds can drop the unit price of reductive amination to $0.5–0.6/g, which make it competitive with transamination route.

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