Proteinaceous Surfactants Prepared by Covalent Attachment ofL-Leucinen-Alkyl Esters to Food Proteins by Modification with Papain

1982 ◽  
pp. 199-221 ◽  
Author(s):  
MICHIKO WATANABE ◽  
SOICHI ARAI
Keyword(s):  
Covalent Attachment ◽  
Alkyl Esters ◽  
Food Proteins

Food Safety of Functional Neoglycoproteins Prepared by Covalent Attachment of Galactomannan to Food Proteins

2002 ◽  
Vol 7 (2) ◽  
pp. 139-145 ◽  
Author(s):  
Soichiro Nakamura ◽  
Kazumi Dokai ◽  
Megumi Matsuura ◽  
Junya Hata ◽  
Hiroki Saeki
Keyword(s):  
Food Safety ◽  
Covalent Attachment ◽  
Food Proteins

scholarly journals Immobilized Alcalase on Micron- and Submicron-Sized Alginate Beads as a Potential Biocatalyst for Hydrolysis of Food Proteins

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 305
Author(s):  
Marko Jonović ◽  
Milena Žuža ◽  
Verica Đorđević ◽  
Nataša Šekuljica ◽  
Milan Milivojević ◽  
...  
Keyword(s):  
Food System ◽  
Physiological Activity ◽  
Egg White ◽  
Alginate Beads ◽  
Covalent Attachment ◽  
Soy Proteins ◽  
Food Proteins ◽  
Enzyme Loading ◽  
Ultrasonic Spray ◽  
Hydrolysis Of

Enzymatic hydrolysis of food proteins is convenient method to improve their functional properties and physiological activity. Herein, the successful covalent attachment of alcalase on alginate micron and submicron beads using the carbodiimide based chemistry reaction and the subsequent application of the beads for egg white and soy proteins hydrolysis were studied. In addition to the electrostatic extrusion technique (EE) previously used by others, the potential utilization of a novel ultrasonic spray atomization technique without drying (UA) and with drying (UAD) for alginate submicron beads production has been attempted. The immobilization parameters were optimized on microbeads obtained by EE technique (803 ± 23 µm) with respect to enzyme loading and alcalase activity. UA and UAD techniques resulted in much smaller particles (607 ± 103 nm and 394 ± 51 nm in diameter, respectively), enabling even higher enzyme loading of 671.6 ± 4 mg g−1 on the carrier and the highest immobilized alcalase activity of 2716.1 IU g−1 in the standard reaction. The UAD biocatalyst exhibited also better performances in the real food system based on egg white or soy proteins. It has been shown that the immobilized alcalase can be reused in seven successive soy protein hydrolysis cycles with a little decrease in the activity.

ACTIVATION OF THE TRANSESTERIFICATIONS PROCESS OF VEGETABLE OILS TRIGLYCERIDES WITH METHANOL UNDER THE INFLUENCE OF MAGNETIC FIELD

2015 ◽  
Vol 11 (6) ◽  
pp. 3630-3634
Author(s):  
T.A. Mamedova ◽  
Z.M. Aliyeva ◽  
A.E. Aliyeva ◽  
R.T. Samedov ◽  
V.M. Abbasov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fatty Acids ◽  
Reaction Time ◽  
Vegetable Oils ◽  
High Yield ◽  
Alkyl Esters ◽  
Sunflower Oils ◽  
The Magnetic Field

The process of producing mono-alkyl esters of fatty acids from cottonseed and sunflower oils under the influence of the magnetic field with intensity  15-45 mT  was  investigated . It was revealed that the use of the energy of  magnetic field allows to reduce the reaction time to 10 times, the excess of used alcohol to 2 times while maintaining high yield of the desired product.

Photochemical and Electrochemical Reduction of Carbon Dioxide Catalyzed by a Polyoxometalate-Organic Photosensitizer Complex

2018 ◽  
Author(s):  
Chandan Dey ◽  
Ronny Neumann
Keyword(s):  
Carbon Dioxide ◽  
Cyclic Voltammetry ◽  
Formic Acid ◽  
Electrochemical Reduction ◽  
Mass Spectroscopy ◽  
Photochemical Reactions ◽  
Reducing Agent ◽  
Covalent Attachment ◽  
Hybrid Complex ◽  
Open Face

<p>A manganese substituted Anderson type polyoxometalate, [MnMo<sub>6</sub>O<sub>24</sub>]<sup>9-</sup>, tethered with an anthracene photosensitizer was prepared and used as catalyst for CO<sub>2</sub> reduction. The polyoxometalate-photosensitizer hybrid complex, obtained by covalent attachment of the sensitizer to only one face of the planar polyoxometalate, was characterized by NMR, IR and mass spectroscopy. Cyclic voltammetry measurements show a catalytic response for the reduction of carbon dioxide, thereby suggesting catalysis at the manganese site on the open face of the polyoxometalate. Controlled potentiometric electrolysis showed the reduction of CO<sub>2</sub> to CO with a TOF of ~15 sec<sup>-1</sup>. Further photochemical reactions showed that the polyoxometalate-anthracene hybrid complex was active for the reduction of CO<sub>2</sub> to yield formic acid and/or CO in varying amounts dependent on the reducing agent used. Control experiments showed that the attachment of the photosensitizer to [MnMo<sub>6</sub>O<sub>24</sub>]<sup>9-</sup> is necessary for photocatalysis.</p><div><br></div>

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