scholarly journals Extraction and Application of Laccases from Shimeji Mushrooms (Pleurotus ostreatus) Residues in Decolourisation of Reactive Dyes and a Comparative Study Using Commercial Laccase from Aspergillus oryzae

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
Ricardo Sposina S. Teixeira ◽  
Patrícia Maia Pereira ◽  
Viridiana S. Ferreira-Leitão
Keyword(s):  
Reaction Time ◽  
Comparative Study ◽  
Organic Pollutants ◽  
Aspergillus Oryzae ◽  
Crude Extract ◽  
Pleurotus Ostreatus ◽  
Sulfonic Acid ◽  
Reactive Dyes ◽  
Colour Removal

Oxidases are able to degrade organic pollutants; however, high costs associated with biocatalysts production still hinder their use in environmental biocatalysis. Our study compared the action of a commercial laccase from Aspergillus oryzae and a rich extract from Pleurotus ostreatus cultivation residues in decolourisation of reactive dyes: Drimaren Blue X-3LR (DMBLR), Drimaren Blue X-BLN (DMBBLN), Drimaren Rubinol X-3LR (DMR), and Drimaren Blue C-R (RBBR). The colour removal was evaluated by considering dye concentration, reaction time, absence or presence of the mediator ABTS (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), and the source of laccase. The presence of ABTS was essential for decolourisation of DMR (80–90%, 1 h) and RBBR (80–90%, 24 h) with both laccases. The use of ABTS was not necessary in reactions containing DMBLR (85–97%, 1 h) and DMBBLN (63–84%, 24 h). The decolourisation of DMBBLN by commercial laccase showed levels near 60% while the crude extract presented 80% in 24 h.

A comparative study of performance in simple and choice reaction time tasks between obese and healthy-weight children

2013 ◽  
Vol 34 (9) ◽  
pp. 2635-2641 ◽  
Author(s):  
Ilse Gentier ◽  
Mireille Augustijn ◽  
Benedicte Deforche ◽  
Ann Tanghe ◽  
Ilse De Bourdeaudhuij ◽  
...  
Keyword(s):  
Reaction Time ◽  
Comparative Study ◽  
Choice Reaction Time ◽  
Healthy Weight

Study on Decolouration of Reactive Dyes by Laccase

2014 ◽  
Vol 12 (1) ◽  
pp. 63-70
Author(s):  
Li DING ◽  
Tieling XING ◽  
Guoqiang CHEN
Keyword(s):  
Metal Ion ◽  
Reactive Dyes ◽  
Cod Removal ◽  
Brilliant Blue ◽  
Optimum Conditions ◽  
Colour Removal ◽  
Removal Rates

Five different structural reactive dyes (Reactive Brilliant Blue K-3R, Everacion Blue H-ERD, Moderzol Blue FBR, Atuzol Black B and Moderzol Blue HEGN) were treated with laccase (Denilite II US) in order to determine the optimum decolouration conditions. The experiments showed that laccase had distinct decolouration effects on these five dyes. Under optimum conditions, the colour removal rates of Everacion Blue H-ERD and Moderzol Blue HEGN were over 90%. Furthermore, the effects of different additives, such as acid ion, metal ion, and surfactants on the decolouration rate of Reactive Brilliant Blue K-3R were discussed. The results show that the decolouration rate is significantly promoted through the addition of Cu2+ and Al3+, while it is inactivated with Fe2+ and ion surfactants. Moreover, the COD removal rates of the five dyes are more than 75%.

scholarly journals A Simple and Green Protocol for 2H-Indazolo[2,1-b]phthalazine-triones Using Grinding Method

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Xiao-chuan Jia ◽  
Jing Li ◽  
Yu Ding ◽  
Bin Zhang ◽  
Na Wang ◽  
...  
Keyword(s):  
Reaction Time ◽  
Sulfonic Acid ◽  
Catalytic Amount ◽  
Solvent Free ◽  
Short Reaction Time ◽  
Green Protocol ◽  
Simple Operation ◽  
Grinding Method ◽  
Toluene Sulfonic Acid ◽  
High Yields

A robust, facile, and solvent-free route for the three-component synthesis of 2H-indazolo[2,1-b]phthalazine-triones in the presence of a catalytic amount ofp-toluene sulfonic acid utilizing grinding has been developed. Short reaction time, simple operation, and high yields are the advantages of this protocol.

scholarly journals A Comparative Study of Simple Auditory Reaction Time in Blind (Congenitally) and Sighted Subjects

2013 ◽  
Vol 35 (3) ◽  
pp. 273-277 ◽  
Author(s):  
Pritesh Hariprasad Gandhi ◽  
Pradnya A. Gokhale ◽  
H. B. Mehta ◽  
C. J. Shah
Keyword(s):  
Reaction Time ◽  
Comparative Study ◽  
Auditory Reaction Time

Study on Synthesis of Ester of Citric Acid and Palmityl Alcohol

2014 ◽  
Vol 900 ◽  
pp. 361-364
Author(s):  
Xiao Hui Wang ◽  
Xi Hua Du ◽  
Li Min Dong
Keyword(s):  
Reaction Time ◽  
Citric Acid ◽  
Cation Exchange ◽  
Sulfonic Acid ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Molar Ratio ◽  
Esterification Reaction ◽  
Process Conditions ◽  
Toluene Sulfonic Acid

Esters of Citric acid and palmityl alcohol were synthesized by esterification reaction under catalysis of cation exchange resin and P-toluene sulfonic acid respectively. The effects of amount of catalyst, ratio of raw materials, reaction time and temperature on the synthesis reaction were investigated . The experimental results showed that optimum of process conditions were 1:1~1:1.5 molar ratio of citric acid and palmityl alcohol, reaction temperature of 130~140°C, reaction time of 2 h. Conversion of palmityl alcohol were all more than 90% under 0.3% dosage using p-toluene sulfonic acid as the catalyst, or 0.5% dosage using 721 cation exchange resin with sulfonic acid type as catalyst. The synthesized product had good surface activity.

scholarly journals Comparative Study of Pleurotus ostreatus Mushroom Grown on Modified PAN Nanofiber Mats

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 475 ◽  
Author(s):  
Lilia Sabantina ◽  
Franziska Kinzel ◽  
Thomas Hauser ◽  
Astrid Többer ◽  
Michaela Klöcker ◽  
...  
Keyword(s):  
Comparative Study ◽  
Growth Rates ◽  
Pleurotus Ostreatus ◽  
Edible Mushroom ◽  
Fungal Mycelium ◽  
Specific Substrate ◽  
Biotechnological Applications ◽  
Mushroom Species ◽  
Nanofiber Mats ◽  
Pan Nanofiber

Pleurotus ostreatus is a well-known edible mushroom species which shows fast growth. The fungus can be used for medical, nutritional, filter, or packaging purposes. In this study, cultivation experiments were carried out with Pleurotus ostreatus growing on polyacrylonitrile (PAN) nanofiber mats in the presence of saccharose and Lutrol F68. The aim of this study was to find out whether modified PAN nanofiber mats are well suited for the growth of fungal mycelium, to increase growth rates and to affect mycelium fiber morphologies. Our results show that Pleurotus ostreatus mycelium grows on nanofiber mats in different morphologies, depending on the specific substrate, and can be used to produce a composite from fungal mycelium and nanofiber mats for biomedical and biotechnological applications.

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