Safety evaluation of lipase derived from Rhizopus oryzae: Summary of toxicological data

Coenen, T.M.M.; Aughton, P; Verhagen, Hans

doi:10.1016/s0278-6915(97)00006-9

Cited by 25 publications

(3 citation statements)

References 5 publications

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“…4a, b) of LDPE films without any treatment, and thermally pretreated followed with fungus incubation after 30 days of incubation with Rhizopus oryzae showed hyphal growth on the surface of polyethylene and degradation of the polyethylene around the fungal cells in the biofilm, causing the formation of grooves in the treated polyethylene after the incubation with Rhizopus oryzae NS5. It is possibly because of Rhizopus secretes lipase, (Coenen et al 1997) tyrosinase, peroxidase (León-Santiesteban et al 2008) and laccase (Shinkafi et al 2014) enzymes capable of degrading polyethylene, and consequence of such enzymatic activities is the grooves formation. It has been identified that the fungus also undergo change in shape upon biofilm formation (Raaman 2012).…”

Section: Surface Morphology Study Of Ldpementioning

confidence: 99%

Biodegradation of thermally treated low density polyethylene by fungus Rhizopus oryzae NS 5

et al. 2017

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Polythene is considered as one of the important object used in daily life. Being versatile in nature and resistant to microbial attack, they effectively cause environmental pollution. In the present study, biodegradation of low-density polyethylene (LDPE) have been performed using fungal lab isolate Rhizopus oryzae NS5. Lab isolate fungal strain capable of adhering to LDPE surface was used for the biodegradation of LDPE. This strain was identified as Rhizopus oryzae NS5 (Accession No. KT160362). Fungal growth was observed on the surface of the polyethylene when cultured in potato dextrose broth at 30°C and 120 rpm, for 1 month. LDPE film was characterized before and after incubation by Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force microscopy and universal tensile machine. About 8.4 ± 3% decrease (gravimetrically) in weight and 60% reduction in tensile strength of polyethylene was observed. Scanning electron microscope analysis showed hyphal penetration and degradation on the surface of polyethylene. Atomic force microscope analysis showed increased surface roughness after treatment with fungal isolate. A thick network of fungal hyphae forming a biofilm was also observed on the surface of the polyethylene pieces. Present study shows the potential of Rhizopus oryzae NS5 in polyethylene degradation in eco friendly and sustainable manner.

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Section: Surface Morphology Study Of Ldpementioning

confidence: 99%

Biodegradation of thermally treated low density polyethylene by fungus Rhizopus oryzae NS 5

et al. 2017

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“…R. oryzae occasionally causes human disease, mucormycosis (Ribes et al, 2002), and is one of the related species used for the making of tempeh, a traditional fermented food of Indonesia produced from cooked soybeans (Hachmeister and Fung, 2003). Literature surveys have not directly indicated that R. oryzae organisms are of a safety concern (Coenen et al, 2007). Although oxygen is usually indispensable for fungal growth, R. oryzae reduced the pH immediately and produced lactic acid under air-tight conditions.…”

Section: Discussionmentioning

confidence: 99%

Lactic acid fermentation of potato pulp by Rhizopus oryzae IFO 5740

Wang¹,

Zhang²

2014

Afr. J. Food Sci.

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Thirty-eight strains of the fungus Rhizopus oryzae were grown on potato pulp, an agricultural byproduct of the starch industry. Either lactic acid or fumaric acid and ethanol were formed, and the ratio differed among the strains tested. The highest amount of L(+)-lactic acid (11.2 mg/g fresh matter) was observed in the pulp fermented for six days by R. oryzae IFO 5740. The IFO 5740 strain rapidly reduced the hardness and pH of potato pulp within one day followed by the gradual synthesis of lactic acid. A composition analysis showed that the enzymes secreted from the fungal cells hydrolyzed starch efficiently with partial degradation of the cell wall. R. oryzae IFO 5740 may be used as an inoculant for ensiling potato pulp and other agricultural by-products containing starch.

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“…Although a number of lipase producing sources are available, only a few bacteria and yeast were exploited for the production of cold adapted lipases (Joseph, 2006). Psychrotrophic fungi such as Rhizopus sp., Mucorsp., have been reported to produce cold active lipases (Coenen, 1997). An extensive research has been carried out in the cold active lipase of C. antarctica compared to other psychrophilic fungi.…”

Section: Lipasesmentioning

confidence: 99%

Psychrophilic yeasts and their biotechnological applications - A review

Hamid¹,

Rana²,

Chauhan³

et al. 2014

Afr. J. Biotechnol.

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More than 70% of earth's surface is covered by cold ecosystems and these ecosystems have been colonized by a class of extremophilic microorganisms called as psychrophiles. Thus psychrophiles are true extremophiles that has the ability to live in extremely low temperature conditions. Psychrophilic yeasts are important due to their physiological adaptation at low temperature and they have potential application in biotechnology. Psychrophilic yeast produces cold-active enzymes having numerous applications in textile, medical and pharmaceuticals, fine chemical synthesis, food industry, domestic and environmental applications. Psychrophilic enzymes from yeast have attracted attention of researchers to explore the new application of these enzymes because of their high activity at low and moderate temperatures. The present review describes various immune biotechnological applications of different cold-active enzymes produced by psychrophilic yeast in different industries.

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Safety evaluation of lipase derived from Rhizopus oryzae: Summary of toxicological data

Cited by 25 publications

References 5 publications

Biodegradation of thermally treated low density polyethylene by fungus Rhizopus oryzae NS 5

Biodegradation of thermally treated low density polyethylene by fungus Rhizopus oryzae NS 5

Lactic acid fermentation of potato pulp by Rhizopus oryzae IFO 5740

Psychrophilic yeasts and their biotechnological applications - A review

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