Chemical Characterization and Antiradical Properties of Pyroligneous Acid from a Preserved Bamboo, Guadua angustifolia Kunth

Abstract

Pyroligneous acid (PA) was obtained by condensation of the vapors produced in the thermal decomposition of culms residues from Guadua angustifolia Kunth (G. angustifolia) cultivated in Colombia, with and without previous preservation treatment with borax salts. Chemical characterization by GC-MS showed that PA extracts has high content of phenolic compounds. Mequinol, isocreosol, 4-ethylphenol, 4ethyl-2-methoxyphenol, 3,5-dimethoxy-4-hydroxytoluene and 2,6-dimethoxyphenol were the most abundant substances, identified. The total phenolic content (TPC) and DPPH free radical scavenging activity, were investigated. TPC showed a concentration of 1.959 mg GA g -1 ±0.010 and 3.844 mg GA g -1 ±0.027 to PAC and PAS samples. These samples also exhibited high DPPH activity of 70.975%±0.921 and, 16.667%±0.298, respectively. The chemical composition, TPC and DPPH results indicate that the PA extracts obtained from G. angustifolia may be used as a raw material in the food industry as natural preservative, in medicine as alternative to antibiotics and in agriculture as insect repellent and foliar fertilizer.

High-Yield Recovery of Antioxidant Compounds from Bambusa chungii Culms Using Pressurized Hot Water Extraction

“…The application of PHWE at temperatures higher than 140 °C resulted in higher extraction yields and total phenolic contents than conventional extraction methods. The highest TPC value obtained in this work (7.6 mg GAE/g of plant material at 180 °C) was lower than the values for five native Brazilian bamboo species reported by Wroblewska et al (43.64~87.81 mg GAE/g RM) [ 46 ] but higher than the values from bamboo culms and related products reported by Gomez et al (1.59~3.84 mg GAE/g RM) [ 47 ], Gong et al (4.21 mg GAE/g RM) [ 48 ], and Nuzul et al (0.45~0.72 mg GAE/g RM) [ 33 ]. The literature data listed above (converted to the same unit) were all obtained from conventional extraction methods using organic solvents and measured by the FC method.…”

Foliar Application of Wood Distillate Alleviates Ozone-Induced Damage in Lettuce (Lactuca sativa L.)

“…WD is rich in antioxidants, such as polyphenols [15,17,37], and is effectively used to increase both the chlorophyll content and biomass of crop plants, as found in some recent studies [16,[38][39][40][41]. Although the mechanisms behind its effectiveness are still in need of investigation, it has been suggested that this stimulant effect on plant productivity may be due to the action of antioxidant molecules on cell division [16], in response to the activation of specific transcription genes, as previously observed by Tanase et al [42,43].…”