Phenolic compounds of three unconventional Sudanese oils

Mariod, Abdalbasit Adam; Matthäus, Bertrand; Eichner, Karl; Hussein, Ismail

doi:10.17306/j.afs.2015.1.7

“…In turn, Baumert et al (2005) in Brassica napus seeds recorded the presence of one of the glucose esters (1,6-di-O-sinapoylglucose), two gentiobiose esters (1-O-caffeoylgentiobiose and 1,2,6'-tri-O-sinapoylgentiobiose) as well as two kaempferol conjugates Koski et al (2003) identified vinylsyringol (canolol), a compound formed under the influence of elevated pressure and temperature in the course of oil extraction. These compounds are ascribed high antioxidant and free radical scavenging activity, with some of them exhibiting bactericidal properties; additionally, they protect DNA, as well as fats and proteins against oxidation (Engels et al, 2012;Kuwahara et al, 2004;Mariod et al, 2015;Siger and Józefiak 2016;Siger et al, 2015;Rękas et al, 2017). In earlier studies conducted to determine changes in the technological and microbiological quality of rapeseeds during selfheating, the authors of this paper observed significant changes in the levels of phenolic compounds.…”

Section: Introductionmentioning

confidence: 76%

Changes in contents of phenolic compounds (sinapic acid derivatives) in seeds of Brassica napus L.under adverse storage conditions

Siger

¹

,

Gawrysiak‐Witulska

²

,

Wawrzyniak

³

2018

Acta Sci Pol Technol Aliment

2

1

0

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Background. The quality of rapeseed oil depends to a considerable degree on raw material quality. Negligence in maintaining the appropriate conditions during long-term rapeseed storage (excessively high humidity and temperature) may contribute to a deterioration of seed quality, as a result of microbial growth and changes in native antioxidant contents. The aim of this study was to investigate the effect of inappropriate storage conditions on changes in sinapic acid derivative content, which is the main phenolic compound in rapeseeds. Material and methods. The material used for tests was canola cv. PR 46 W14. Seeds with a 13.5% moisture content were stored for 21 days in a thermo-hygrostat chamber, ensuring rapeseed storage under constant humidity and temperature conditions. In this study, the level of mould fungi was analysed using the plate method, while those of sinapic acid derivatives were determined using the HPLC-DAD method. Results. Intensive growth of mould fungi in the rapeseeds was observed after 6 days of storage. Changes were recorded in sinapic acid derivative contents, which are the main phenolic compounds in rapeseed. The level of phenolic compounds found in the bound form (sinapin; sinapic acid methyl ester; 1,2-disinapoyldihexoside; 1,2-disinapoyl-hexoside and 1,2,2'-trisinapoyl-dihexoside) decreased. At the same time, an increase was recorded in trans-sinapic acid content (by 63%). Conclusion. Both qualitative and quantitative changes in phenolic compounds may be connected with the development of fungal microflora in stored rapeseeds. Only adequate storage conditions for the oil raw material, such as rapeseeds, may ensure good quality in the final product, in this case, rapeseed oil.

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“…Koski et al (2003) identified vinylsyringol (canolol), a compound formed under the influence of elevated pressure and temperature in the course of oil extraction. These compounds are ascribed high antioxidant and free radical scavenging activity, with some of them exhibiting bactericidal properties; additionally, they protect DNA, as well as fats and proteins against oxidation (Engels et al, 2012;Kuwahara et al, 2004;Mariod et al, 2015;Siger and Józefiak 2016;Siger et al, 2015;Rękas et al, 2017). In earlier studies conducted to determine changes in the technological and microbiological quality of rapeseeds during selfheating, the authors of this paper observed significant changes in the levels of phenolic compounds.…”

Section: Introductionmentioning

confidence: 76%

Changes in contents of phenolic compounds (sinapic acid derivatives) in seeds of Brassica napus L.under adverse storage conditions [pdf]

Siger¹,

Gawrysiak‐Witulska²,

Wawrzyniak³

2018

Acta Sci Pol Technol Aliment

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Background. The quality of rapeseed oil depends to a considerable degree on raw material quality. Negligence in maintaining the appropriate conditions during long-term rapeseed storage (excessively high humidity and temperature) may contribute to a deterioration of seed quality, as a result of microbial growth and changes in native antioxidant contents. The aim of this study was to investigate the effect of inappropriate storage conditions on changes in sinapic acid derivative content, which is the main phenolic compound in rapeseeds. Material and methods. The material used for tests was canola cv. PR 46 W14. Seeds with a 13.5% moisture content were stored for 21 days in a thermo-hygrostat chamber, ensuring rapeseed storage under constant humidity and temperature conditions. In this study, the level of mould fungi was analysed using the plate method, while those of sinapic acid derivatives were determined using the HPLC-DAD method. Results. Intensive growth of mould fungi in the rapeseeds was observed after 6 days of storage. Changes were recorded in sinapic acid derivative contents, which are the main phenolic compounds in rapeseed. The level of phenolic compounds found in the bound form (sinapin; sinapic acid methyl ester; 1,2-disinapoyldihexoside; 1,2-disinapoyl-hexoside and 1,2,2'-trisinapoyl-dihexoside) decreased. At the same time, an increase was recorded in trans-sinapic acid content (by 63%). Conclusion. Both qualitative and quantitative changes in phenolic compounds may be connected with the development of fungal microflora in stored rapeseeds. Only adequate storage conditions for the oil raw material, such as rapeseeds, may ensure good quality in the final product, in this case, rapeseed oil.

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“…Gelatin is a mixture of proteins and peptides and is the product of partial hydrolysis of collagen. [104,198,199] Gelatin can be extracted from the tendon, skins, tissues, and bones from biological resources such as animals, chickens, and even insects. Gelatin can also be functionalized by other bio-materials, e.g., cellulose, chitosan, starch etc., and is widely used in the food industry, tissue engineering, bioprinting etc.…”

Section: Gelatinmentioning

confidence: 99%

Bio‐Derived Natural Materials Based Triboelectric Devices for Self‐Powered Ubiquitous Wearable and Implantable Intelligent Devices

Yang

¹

,

Fan

²

,

Wu

³

2020

Advanced Sustainable Systems

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The capability of devices in future ubiquitous networked wearable and implantable electronics to efficiently scavenge and store operational power from their working environment through sustainable pathways would enable viable self‐powering schemes in societally‐pervasive applications such as advanced healthcare and robotics. Triboelectric nanogenerators (TENGs) can efficiently harvest the ubiquitous mechanical energy for powering electronics and sensors. However, the majority of demonstrated TENG prototypes have been built with materials that are not biodegradable or biocompatible, which significantly hinders the application of TENGs for wearable and implantable technologies. In this review, the recent progress of the wearable and implantable triboelectric devices built with bio‐derived natural materials is summarized. The properties of these natural biopolymers are discussed in the context of self‐powered triboelectric applications. The common manufacturing methods for processing these materials into triboelectric devices are also discussed. In addition, the applications of the bio‐derived natural materials based TENGs for in vitro and in vivo applications are discussed. Finally, the outstanding challenges and potential opportunities for the development of bio‐derived natural materials based triboelectric devices targeting wearable and implantable human‐integrated applications are analyzed.

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Phenolic compounds of three unconventional Sudanese oils

Cited by 35 publications

References 18 publications

Changes in contents of phenolic compounds (sinapic acid derivatives) in seeds of Brassica napus L.under adverse storage conditions

Changes in contents of phenolic compounds (sinapic acid derivatives) in seeds of Brassica napus L.under adverse storage conditions

Changes in contents of phenolic compounds (sinapic acid derivatives) in seeds of Brassica napus L.under adverse storage conditions [pdf]

Bio‐Derived Natural Materials Based Triboelectric Devices for Self‐Powered Ubiquitous Wearable and Implantable Intelligent Devices

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