Comparative biodegradation studies of cow dung modified epoxy with epoxy using an indigenously developed bacterial consortium

Raghuwanshi, Shikha; Negi, Harshita; Aggarwal, Tithi; Zaidi, M. G. H.; Goel, Reeta

doi:10.5897/ajmr2015.7462

Cited by 9 publications

(8 citation statements)

References 11 publications

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“…TGA is an analytical technique used to determine a material's thermal stability and its fraction of volatile components by monitoring its weight variation as a function of a constant heating rate in a controlled atmosphere. Several thermogravimetric studies on the biodegradation of polymers revealed that the decomposition temperatures of polymers shift to lower temperatures with longer temperature spans after degradation in comparison to polymers that have not been degraded [58,[64][65][66][67]. In some of these studies, TGA was combined with simultaneous differential thermal analysis (DTA) and derivative thermogravimetry (DTG) to gain a better understanding of the thermal properties of the biodegraded studied polymers [66,67] The average molecular weight of a polymeric material has a direct effect on its intrinsic viscosity; the higher the average molecular weight, the greater the intrinsic viscosity.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

State-of-the-Art Review of Aliphatic Polyesters and Polyolefins Biodeterioration by Microorganisms: From Mechanism to Characterization

Khoshtinat

2023

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As a result of the exponential growth in the production of plastics and their extended degradation period, strong environmental concerns in association with the disposal of plastic waste have emerged. Pursuing sustainable solutions for managing plastic waste has led to significant interest in plastic biodegradation research, with a specific focus on biodeterioration facilitated by microorganisms. The biodeterioration of plastic by microorganisms is a complex phenomenon that can be influenced by a variety of environmental factors such as humidity, temperature, and pH, as well as polymer properties such as molecular structure, molecular weight, and crystallinity. Toward a better understanding of this phenomenon for resolving the issue of plastic waste, this review article focuses on the biodeterioration of synthetic polymers, in particular aliphatic polyesters and polyolefins, through the enzymatic activities of microorganisms. First, the mechanism of polymer biodegradation via enzymatic activity is discussed, followed by the physical properties of polymers and environmental conditions that influence their biodegradability rates. Then, an overview of experimental approaches and standardized protocols used to assess the biodegradability of polymers by these degrading agents is provided. Finally, current developments in employing biodeterioration for the degradation of aliphatic polyesters and polyolefins are reviewed. The review concludes with a discussion on the complexity of biodegradation by microorganisms, the necessity of proper engineering of polymer properties during production to enhance their biodegradability, and the need for further research to discover sustainable and environmentally acceptable alternatives.

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Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

State-of-the-Art Review of Aliphatic Polyesters and Polyolefins Biodeterioration by Microorganisms: From Mechanism to Characterization

Khoshtinat

2023

CMD

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“…Strain MK3 (DQ318884), Bacterium Te68R Strain PN12 (DQ423487), Pseudomonas putida Strain PW1 (EU741798), and Enterobacter sp. Strain Lna3 (DQ205431), were selected on the basis of their pre-identified potential to act upon LDPE (Soni et al 2009;Kapri et al 2010) and epoxy and its blends (Negi et al 2009;Raghuwanshi et al 2015), respectively. The cultures were revived by inoculating into 5.0 mL nutrient broth test tubes at optimum pH (7 ± 0.2) and temperature (35 ± 1°C).…”

Section: Bacterial Consortiummentioning

confidence: 99%

“…The calculated amount (CFU mL -1 ) of each mid-log phase bacterial strain was mixed to form bacterial consortium (Goel et al 2011). The compatibility test of each strain was conducted prior to the preparation of consortium as described earlier (Raghuwanshi et al 2015;Goel et al 2011).…”

Section: Bacterial Consortiummentioning

confidence: 99%

“…This preliminary result affirmed that the consortium has utilized PHB powder as sole carbon source for their survival, as the growth medium was not containing any other carbon source. It has been shown and considered that the relative higher growth of bacterial consortium is achieved only when polymer is utilized as sole source of carbon and energy (Raghuwanshi et al 2015;Anwar et al 2016).…”

Section: In Vitro Phb-utilization and Comparative Growth Profiling Ofmentioning

confidence: 99%

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Comparative in situ biodegradation studies of polyhydroxybutyrate film composites

et al. 2017

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Application of polyhydroxybutyrate (PHB) to plastic industry has expanded over the last decades due to its attracting features over petro-based plastic, and therefore, its waste accumulation in nature is inevitable. In the present study, a total of four bacterial strains, viz., MK3, PN12, PW1, and Lna3, were formulated into a consortium and subsequently used as biological tool for degradation of biopolymers. The consortium was tested through λ shifts under in vitro conditions for utilization of PHB as sole carbon source. Talc-based bioformulations of consortium were used for the degradation of PHB film composites under in situ conditions. After 9 months of incubation, the recovered samples were monitored through Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM), respectively. Analytical data, viz., changes in λ shifts (212-219 nm), FT-IR spectra, and SEM micrographs, revealed the biodegradation potential of developed consortium against PHB film composites, i.e., higher degradation of copolymer films was found over blend films. The used consortium had enhanced the rate of natural degradation and can be further used as a natural tool to maintain and restore global environmental safety.

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“…Medicinal plants play an important role in the livelihood worldwide and are used as raw materials for the extraction of active constituents in pure form (eg., alkaloids such as quinine and quinidine from cinchona bark, emetine from ipecacuanha root, glycosides from digitalis leaves, sennosides from senna leaves), as precursors for synthetic vitamins or steroids and as preparations for indigenous and herbal medicines [3]. Medicinal plants are the localized and global heritage of natural antioxidants in addition to other significant bioactive leads that are implemented in the prevention and treatment of diseases such as atherosclerosis, heart stroke, diabetes, cancer, and the ageing process that is prevalent in both rural and urban areas [4,5]. India's forests are the fundamental repository for a plethora of fragrant plants.…”

Section: Introductionmentioning

confidence: 99%

Composition, antioxidant and anti-inflammatory activities of different polarity extracts of Anaphalis busua from the Himalayan terrain of Uttarakhand

et al. 2023

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The current study describes the analysis of the phytochemical composition and biological activities of various polarity extracts of the Anaphalis busua plant that was collected at an altitude of 1654 m in the Himalayan terrain of Uttarakhand, India. The extracts were prepared by the cold percolation method, which was then subjected to GC-MS for phytochemical analysis. A total of 31 compounds were identified that constituted 94.95% of the total methanolic extract. Mome inositol (31.03%) was identified as the main compound in the methanolic extract. Twenty-two compounds that comprise 68.24% of the total hexane extract were identified. Tetracontane (19.33%) was present in a significant proportion. The methanolic extract demonstrated potent antioxidant activity in terms of DPPH radical scavenging and metal chelating activity that have IC50 values of 81.71±1.334 and 11.26±0.005 µg/mL, respectively, compared to standards ascorbic acid and EDTA that have IC50 values at 12.71±0.02 and 11.36±0.06 µg/mL, respectively. The methanolic extract showed potent anti-inflammatory activity with an IC50 value of 24.10±0.09 µg/mL in comparison to standard diclofenac potassium with an IC50 value of 18.95±0.03 µg/mL. In vitro studies reveal that A. busua has a strong therapeutic potential and, if further explored, may prove to be a powerful antioxidant, anti-inflammatory, and cost-effective agent compared to synthetically derived agents from pharmaceutical industries.

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Comparative biodegradation studies of cow dung modified epoxy with epoxy using an indigenously developed bacterial consortium

Cited by 9 publications

References 11 publications

State-of-the-Art Review of Aliphatic Polyesters and Polyolefins Biodeterioration by Microorganisms: From Mechanism to Characterization

State-of-the-Art Review of Aliphatic Polyesters and Polyolefins Biodeterioration by Microorganisms: From Mechanism to Characterization

Comparative in situ biodegradation studies of polyhydroxybutyrate film composites

Composition, antioxidant and anti-inflammatory activities of different polarity extracts of Anaphalis busua from the Himalayan terrain of Uttarakhand

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