Catalysis and inactivation of tyrosinase in its action on o-diphenols, o-aminophenols and o-phenylendiamines: Potential use in industrial applications

Nanocellulose (NC) and its wide applications have attracted high attention due to its desirable properties such as high surface area, extraordinary mechanical properties, high reactivity and easy modification of NC surface due to the presence of primary hydroxyl groups. NC also presents several environmental benefits, including high potential availability because its production is coming from natural sources, renewability and nontoxicity. This paper briefly summarizes some of the activities of the research group “Cellulose, Paper and Water Advanced Treatments” from Complutense University of Madrid that were presented in CAIQ 2019, including the main types of NC, the production processes and their characterization. Additionally, the most promising NC applications are described such as for paper and board, for wastewater treatment, food and cement-based materials. Moreover, a market perspective of NC is also presented.

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Structural features underlying the selective cleavage of a novel exo-type maltose-forming amylase fromPyrococcussp. ST04

Acta Crystallographica Section D Biological Crystallography ◽

10.1107/s1399004714006567 ◽

2014 ◽

Vol 70 (6) ◽

pp. 1659-1668 ◽

Cited By ~ 6

Author(s):

Kwang-Hyun Park ◽

Jong-Hyun Jung ◽

Sung-Goo Park ◽

Myeong-Eun Lee ◽

James F. Holden ◽

...

Keyword(s):

Amino Acids ◽

Molecular Basis ◽

Amino Acid Sequence Identity ◽

Structural Features ◽

Industrial Applications ◽

Closed Cavity ◽

Helical Bundles ◽

Sequence Identity ◽

Hydrolysis Of ◽

Potential Use

A novel maltose-forming α-amylase (PSMA) was recently found in the hyperthermophilic archaeonPyrococcussp. ST04. This enzyme shows <13% amino-acid sequence identity to other known α-amylases and displays a unique enzymatic property in that it hydrolyzes both α-1,4-glucosidic and α-1,6-glucosidic linkages of substrates, recognizing only maltose units, in an exo-type manner. Here, the crystal structure of PSMA at a resolution of 1.8 Å is reported, showing a tight ring-shaped tetramer with monomers composed of two domains: an N-domain (amino acids 1–341) with a typical GH57 family (β/α)7-barrel fold and a C-domain (amino acids 342–597) composed of α-helical bundles. A small closed cavity observed in proximity to the catalytic residues Glu153 and Asp253 at the domain interface has the appropriate volume and geometry to bind a maltose unit, accounting for the selective exo-type maltose hydrolysis of the enzyme. A narrow gate at the putative subsite +1 formed by residue Phe218 and Phe452 is essential for specific cleavage of glucosidic bonds. The closed cavity at the active site is connected to a short substrate-binding channel that extends to the central hole of the tetramer, exhibiting a geometry that is significantly different from classical maltogenic amylases or β-amylases. The structural features of this novel exo-type maltose-forming α-amylase provide a molecular basis for its unique enzymatic characteristics and for its potential use in industrial applications and protein engineering.

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Novel Templated Polyphenol for Ionic Conductivity

MRS Proceedings ◽

10.1557/proc-702-u6.6.1 ◽

2001 ◽

Vol 702 ◽

Author(s):

Ferdinando F. Bruno ◽

Ramaswamy Nagarajan ◽

Jayant Kumar ◽

Lynne A. Samuelson

Keyword(s):

Molecular Weight ◽

Ionic Conductivity ◽

High Molecular Weight ◽

Polyethylene Oxide ◽

Phenol Formaldehyde ◽

Industrial Applications ◽

Water Soluble ◽

Reaction Conditions ◽

Water Solvent ◽

Potential Use

ABSTRACTPhenolic polymers and phenol formaldehyde resins are of great interest for a number of electronic and industrial applications. Unfortunately, the toxic nature of the starting materials (formaldehyde) and harsh reaction conditions required for the synthesis of these polymers have severely limited their use in today’s markets. We present here an alternative, biocatalytic approach where the enzyme horseradish peroxidase is used to polymerize phenol in the presence of a template such as polyethylene oxide. Here the template serves as a surfactant that can both emulsify the phenol and polyphenol chains during polymerization and maintain water/solvent solubility of the final polyphenol/template complex. The reactants and the reaction conditions of this approach are mild and result in high molecular weight, electrically and optically active, water-soluble complexes of polyphenol and the template used. High molecular weight water-soluble polyphenol/polyethylene oxide complexes were formed. The ionic conductivity and potential use of these polymers as polyelectrolytes for battery and solution cell applications will be discussed.

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Tribological behavior of polyamide-6 plastics and their potential use in industrial applications

Wear ◽

10.1016/j.wear.2017.01.090 ◽

2017 ◽

Vol 376-377 ◽

pp. 1391-1398 ◽

Cited By ~ 11

Author(s):

P.D. Neis ◽

N.F. Ferreira ◽

J.C. Poletto ◽

J. Sukumaran ◽

M. Andó ◽

...

Keyword(s):

Tribological Behavior ◽

Polyamide 6 ◽

Industrial Applications ◽

Potential Use

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DERIVATION OF MOTIVATORS FOR THE USE OF ALUMINUM FOAM SANDWICH AND ADVANTAGEOUS APPLICATIONS

Proceedings of the Design Society ◽

10.1017/pds.2021.93 ◽

2021 ◽

Vol 1 ◽

pp. 933-942

Author(s):

Patrick Hommel ◽

Daniel Roth ◽

Hansgeorg Binz

Keyword(s):

Aluminum Foam ◽

Industrial Applications ◽

Selection Method ◽

Design Knowledge ◽

Series Production ◽

Absorption Properties ◽

Material Combination ◽

Good Energy ◽

Innovative Material ◽

Potential Use

AbstractAluminum foam sandwich (AFS) is an innovative material combination for designing lighter products and has many advantages such as a high bending stiffness at a low density and good energy absorption properties. Although the material is ready for series production, the number of industrial applications is low because of the high costs of the material, a lack of design knowledge and missing reference applications. This paper focuses on the aspect of missing reference applications and how to improve this situation in order to give designers an idea of where the material could be used profitably and to provide the basis for a selection method. Therefore, a systematic literature review is carried out to identify profitable applications with their respective advantages. As a main result, a set of motivators for the use of aluminum foam sandwich is developed, which will support the designer in evaluating the potential use of aluminum foam sandwich.

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Isolation and identification of proteolytic, amylolytic, lipolytic, and chitinolytic bacteria from shrimp waste

Revista Peruana de Biología ◽

10.15381/rpb.v28i1.18353 ◽

2021 ◽

Vol 28 (1) ◽

pp. e18353

Author(s):

Susana Sirvas Cornejo ◽

Vanesa Buleje ◽

Licia Salvatierra ◽

Michael L. Jaramillo

Keyword(s):

Waste Treatment ◽

Industrial Applications ◽

Chemical Processes ◽

Shrimp Waste ◽

Bacterial Strains ◽

Isolation And Identification ◽

Microbial Enzymes ◽

Chitinolytic Bacteria ◽

By Products ◽

Potential Use

Bacteria and microbial enzymes are biocatalysts and can be used as an alternative to industrial chemical processes. The present study focused on isolating and identifying bacterial strains from shrimp waste, that produce amylases, lipases, proteases and chitinases with potential use on shrimp waste treatment. Thirty-two bacterial strains were isolated, phenotypically characterized, and identified by the API system and the molecular analysis of the 16S rDNA. It was found that 28.13% of the isolated bacterial strains had amylolytic capacity, 87.50% lipolytic, 96.88% proteolytic and 28.13% chitinolytic capacity on agar plates with specific substrates. The genera Bacillus, Burkholderia, Ochrobactrum, Vibrio, Pseudomonas and Shewanella were identified. Bacteria with enzymatic capacities isolated in the present study, could be used to obtain by-products from shrimp waste as well as other industrial applications.

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Recent Advances in Copper-Catalyzed Radical C–H Bond Activation Using N–F Reagents

Synthesis ◽

10.1055/s-0040-1707234 ◽

2020 ◽

Vol 53 (01) ◽

pp. 51-64

Author(s):

José María Muñoz-Molina ◽

Tomás R. Belderrain ◽

Pedro J. Pérez

Keyword(s):

Hydrogen Atom ◽

Bond Activation ◽

Short Review ◽

Industrial Applications ◽

Hydrogen Atom Transfer ◽

Atom Transfer ◽

Bond Functionalization ◽

The Future ◽

Intramolecular Hydrogen ◽

Potential Use

This Short Review is aimed at giving an update in the area of copper-catalyzed C–H functionalization involving nitrogen-centered radicals generated from substrates containing N–F bonds. These processes include intermolecular Csp3–H bond functionalization, remote Csp3–H bond functionalization via intramolecular hydrogen atom transfer (HAT), and Csp2–H bond functionalization, which might be of potential use in industrial applications in the future.1 Introduction2 Intermolecular Csp3–H Functionalization3 Remote Csp3–H Functionalization4 Csp2–H Functionalization5 Conclusion

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Sunflower protein enrichment. Methods and potential applications

OCL ◽

10.1051/ocl/2020007 ◽

2020 ◽

Vol 27 ◽

pp. 17 ◽

Cited By ~ 1

Author(s):

Marcello Murru ◽

Concepcion Lera Calvo

Keyword(s):

Protein Content ◽

Industrial Applications ◽

High Protein ◽

Sunflower Meal ◽

Low Protein ◽

Lower Protein ◽

Potential Applications ◽

Sunflower Protein ◽

Mechanical Separation ◽

Potential Use

A method to increase the protein content of sunflower meal was developed that uses a combination of milling, sieving and gravity tables to separate fractions with higher and lower protein content. The investigation allowed to compare different mills’ ability to break down the lumps of raw sunflower meal and allow a suitable mechanical separation with sieving and gravity separation. Different settings of the mills were tested with or without material pre-sieving. Sieve mesh sizes were investigated in the range 250 to 500 μm that allowed the production of high protein fine material and a good performance of the gravity table separation. Sunflower meal was successfully enriched in protein to a level similar to low protein soybean meal by utilising the process described in this work. In particular proteins were increased on average by 7% to a level of 43.5%. The yield of the separation can justify industrial applications of this process whereby the high protein material can have a potential use in feed and food formulations.

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Yellow Oleander (Thevetia peruviana) Seed as a Potential Bioresource for Industrial Applications

Mini-Reviews in Organic Chemistry ◽

10.2174/1570193x17666191230122142 ◽

2020 ◽

Vol 17 (7) ◽

pp. 855-871 ◽

Cited By ~ 1

Author(s):

Bidangshri Basumatary ◽

Biswajit Nath ◽

Pranjal Kalita ◽

Bipul Das ◽

Sanjay Basumatary

Keyword(s):

Animal Feed ◽

Raw Materials ◽

Value Added ◽

Industrial Applications ◽

Edible Oil ◽

Edible Fruit ◽

Thevetia Peruviana ◽

High Concern ◽

Potential Use ◽

Value Added Products

Raw materials from renewable natural resources for industrial applications are in high concern in recent industrial research. Researchers invest their time in the management of waste as well as the conversion of waste to wealth. In that line, the production of biofuels including biodiesel, and value-added products from non-edible oil sources as well as from the generated waste biomasses, are in the tilt of research in recent times. Preparation of different oleochemicals such as grease, resins, soap, lubricants, etc. from vegetable oils, and utilization of seed cake as fertilizer, animal feed, medicine, etc. are encouraged as a part of the generation of waste to wealth as per today’s environment is concerned. In recent days, various reports on the production of biodiesel and other oleochemicals from non-edible oil sources are published in various scientific journals. Yellow oleander (Thevetia peruviana) is a tropical shrub which produces a toxic non-edible fruit containing a high percentage of seed oil (up to 67%), protein (30-37%) as well as other medicinally important phytochemicals. It is attracting the researchers worldwide for the production of biodiesel, various oleochemicals, medicine, animal feed, etc. In this study, biodiesel and various value-added products synthesized from Thevetia peruviana oil and cake are reviewed to generate and popularize the potential use of yellow oleander seed for various industrial applications and accordingly, for substantial growth in cultivation for commercial-scale requirements.

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