Penicillium Enzymes for the Food Industries

Meena, Mukesh; Zehra, Andleeb; Dubey, Manish Kumar; Aamir, Mohd; Upadhyay, Ram Sanmukh

doi:10.1016/b978-0-444-63501-3.00009-0

Cited by 11 publications

(7 citation statements)

References 189 publications

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“…At the second stage of catalyst annealing in the oxygen flow (350 • C), acetone and metal surfaces were oxidized accompanied by the formation of chemisorbed particles of metal oxides (PdO) s and (Bi 2 O 3 ) s , carbon dioxide, and water (Pd 2+ ) s + O 2 → (PdO) s (6) During preparation of the Pd→Bi catalyst at the stage of impregnation of the support with the Pd(acac) 2 precursor solution, the same reactions proceeded as those for the PdBi catalyst (Equations (1), (3) and (4)). For the stage of impregnation of the support with a Bi(NO 3 ) 3 acidified solution, a mechanism of the interaction was proposed, by which a surface compound of nitrate with aluminum and bismuth was formed Bi(NO 3 ) 3 + (Al 3+ ) s → [Al(NO 3 ) 3 ] s + (Bi 3+ ) s (11) Furthermore, at the stage of catalyst annealing (500 • C), the surface acetylacetonate complex (Equations (3) and (4)) and aluminum nitrate decomposed in the argon flow according to Equation (12) [Al(NO 3 ) 3 ] s → [Al-O] s + NO 2 + O 2 (12) During subsequent oxidation-reduction temperature treatments of the catalyst, the reactions proceeded according to Equations (6), (7), (9), (10).…”

Section: Resultsmentioning

confidence: 99%

Influence of the Method of Preparation of the Pd-Bi/Al2O3 Catalyst on Catalytic Properties in the Reaction of Liquid-Phase Oxidation of Glucose into Gluconic Acid

et al. 2020

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Gluconic acid and its derivatives are extensively used in pharmaceutical, food, textile, and pulp and paper branches of industry during production of food additives, cleansers, medicinal drugs, stabilizers, etc. To obtain gluconic acid, the method of conversion of glucose into gluconic acid by molecular oxygen in the presence of solid catalysts is promising. The process of obtaining Pd and bimetallic nanoparticles Pd-Bi, coated on Al2O3, has been considered in the work. Samples were prepared by combined and successive impregnation of the Al2O3 support using metalloorganic precursors Pd(acac)2, Bi(ac)3, and dissolved in an organic solvent (acetic acid), followed by the removal of excess solvent. To achieve the formation of Pd and bimetallic nanoparticles Pd-Bi on the substrate surface, the synthesized samples were subjected to thermal decomposition sequentially in the atmosphere of Ar, O2, and H2. The surface of the obtained catalysts was studied by a combination of physicochemical methods of analysis. The catalysts were analyzed in the reaction of liquid phase oxidation of glucose. The best results are achieved in the presence of the catalyst obtained by combined impregnation.

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Section: Resultsmentioning

confidence: 99%

Influence of the Method of Preparation of the Pd-Bi/Al2O3 Catalyst on Catalytic Properties in the Reaction of Liquid-Phase Oxidation of Glucose into Gluconic Acid

et al. 2020

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“…Several studies have been performed on the microbial modi cation of testosterone by different microorganisms, especially fungi, to produce its various derivatives. Accordingly, the well-known biocatalytic reactions on testosterone include hydroxylation, oxidation of 17β-OH to the corresponding ketone, dehydrogenation, and ring-D lactonization and hydroxylation is the most common (Yildirim et (Nicoletti et al 2008;Meena et al 2017). Some members of the genus have been extensively studied for their biocatalytic activities, especially in fungal biotransformation processes of steroids (Bartmańska et al 2005;Yildirim et al 2010a;Cabeza et al 1999;Yang et al 2014;Holland et al 1995;Tweit et al 1962;Panek et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Biotransformation of testosterone by the filamentous fungus Penicillium pinophilum

Mehmannavaz

Nickavar

2022

Arch Microbiol

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The microbial biotransformation is a robust procedure in developing steroids and fungi are practical tools in this process therefore, the fungal modi cation of testosterone by Penicillium pinophilum was investigated. The three prominent metabolites, including 14α-hydroxyandrost-4-en-3,17-dione (II), 14αhydroxytestosterone (III), and 11α-hydroxytestosterone (IV), were isolated and characterized by chromatographic and spectroscopic methods. The time course pro le showed that the content of the metabolites II and III began to decrease after 24 h and 96 h, respectively. In comparison, the content of the metabolite IV remained stable after 24 h. In-silico studies showed that the probability of binding to the androgen receptor remains high for all three metabolites. However, the probability of binding to the estrogen receptors α and β increased for metabolite IV but decreased for metabolite III. Penicillium pinophilum as a potentially viable biocatalyst could hydroxylate C-11α and C-14α positions and oxidize the C-17β hydroxyl group to 17-ketone in testosterone molecule.

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“…In most of the non-porous Au or Ag coated particle-based (such as in gene gun process) DNA or chemical delivery limitations were shown to the nucleic acid. The microinjection process can also be used for DNA delivery to the plant cell for genetic modification but they were found to be inefficient ( Ahmad and Mukhtar, 2017 ; Meena et al, 2017g ; Meena et al, 2017h ). The specific feature of MSN is to prevent the leaching out of loaded molecules or drugs due to covalent bonding with the pore.…”

Section: Introductionmentioning

confidence: 99%

Endophytic Nanotechnology: An Approach to Study Scope and Potential Applications

et al. 2021

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Nanotechnology has become a very advanced and popular form of technology with huge potentials. Nanotechnology has been very well explored in the fields of electronics, automobiles, construction, medicine, and cosmetics, but the exploration of nanotecnology’s use in agriculture is still limited. Due to climate change, each year around 40% of crops face abiotic and biotic stress; with the global demand for food increasing, nanotechnology is seen as the best method to mitigate challenges in disease management in crops by reducing the use of chemical inputs such as herbicides, pesticides, and fungicides. The use of these toxic chemicals is potentially harmful to humans and the environment. Therefore, using NPs as fungicides/ bactericides or as nanofertilizers, due to their small size and high surface area with high reactivity, reduces the problems in plant disease management. There are several methods that have been used to synthesize NPs, such as physical and chemical methods. Specially, we need ecofriendly and nontoxic methods for the synthesis of NPs. Some biological organisms like plants, algae, yeast, bacteria, actinomycetes, and fungi have emerged as superlative candidates for the biological synthesis of NPs (also considered as green synthesis). Among these biological methods, endophytic microorganisms have been widely used to synthesize NPs with low metallic ions, which opens a new possibility on the edge of biological nanotechnology. In this review, we will have discussed the different methods of synthesis of NPs, such as top-down, bottom-up, and green synthesis (specially including endophytic microorganisms) methods, their mechanisms, different forms of NPs, such as magnesium oxide nanoparticles (MgO-NPs), copper nanoparticles (Cu-NPs), chitosan nanoparticles (CS-NPs), β-d-glucan nanoparticles (GNPs), and engineered nanoparticles (quantum dots, metalloids, nonmetals, carbon nanomaterials, dendrimers, and liposomes), and their molecular approaches in various aspects. At the molecular level, nanoparticles, such as mesoporous silica nanoparticles (MSN) and RNA-interference molecules, can also be used as molecular tools to carry genetic material during genetic engineering of plants. In plant disease management, NPs can be used as biosensors to diagnose the disease.

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Penicillium Enzymes for the Food Industries

Cited by 11 publications

References 189 publications

Influence of the Method of Preparation of the Pd-Bi/Al2O3 Catalyst on Catalytic Properties in the Reaction of Liquid-Phase Oxidation of Glucose into Gluconic Acid

Influence of the Method of Preparation of the Pd-Bi/Al2O3 Catalyst on Catalytic Properties in the Reaction of Liquid-Phase Oxidation of Glucose into Gluconic Acid

Biotransformation of testosterone by the filamentous fungus Penicillium pinophilum

Endophytic Nanotechnology: An Approach to Study Scope and Potential Applications

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