1,720,974 research outputs found
Analysis of bio-chemicals extractable from untreated wood waste
No full textGas-chromatography combined with mass spectroscopy was used to identify low-molecular weight organic compounds in two arboreal species. The woody extracts of seasoned heartwood of Quercus petraea and Myrocarpus frondosus, of interest to the parquet industry and the environmental field, were investigated. Different alkali extraction procedures were carried out using a CH3OH/H2O (1:1, v/v) solution. Particularly high extraction rates were obtained for antioxidant compounds such as ferulic acid (1.596 mg/g), syringaldehyde (0.74 mg/g), vanillic acid (0.327 mg/g) and gallic acid (0.114 mg/g). (E)-coniferyl alcohol, ranging from 0.006 mg/g to 0.099 mg/g, was found in all the samples, depending on the sample and extraction procedure, suggesting its use as an indicator of lignin degradation under alkali hydrolysis
Solid anaerobic digestion batch of bio-waste as pre-treatment for improving amendment quality: The effect of inoculum recirculation
No full textThe effect of solid anaerobic digestion batch (SADB) on bio-waste performed with and without inoculum
on the quality of the final amendment was investigated by means of determining the content of organic
carbon, humic and fulvic acids and the degree of humification. Two different processes were compared:
composting and SADB with post-composting. Six parallel tests were performed. In three of these tests the
SADB was inoculated mixing the bio-waste with the digestate from the previous run in a 1:1 ratio by
weight. The amendment obtained by the SADB with post-composting treatment, in which the SADB
was not inoculated, had an organic carbon content ranging from 15.5% TS to 30.3% TS resulting from
1% up to 14% higher than that of the corresponding composting processes. Similar results were achieved
for the degree of humification. On the other hand SADB in which the inoculum was used generated about
300 NL/kgVS of biogas instead of about 267 NL/kgVS for non-inoculated runs.The effect of solid anaerobic digestion batch (SADB) on bio-waste performed with and without inoculum on the quality of the final amendment was investigated by means of determining the content of organic carbon, humic and fulvic acids and the degree of humification. Two different processes were compared: composting and SADB with post-composting. Six parallel tests were performed. In three of these tests the SADB was inoculated mixing the bio-waste with the digestate from the previous run in a 1:1 ratio by weight. The amendment obtained by the SADB with post-composting treatment, in which the SADB was not inoculated, had an organic carbon content ranging from 15.5% TS to 30.3% TS resulting from 1% up to 14% higher than that of the corresponding composting processes. Similar results were achieved for the degree of humification. On the other hand SADB in which the inoculum was used generated about 300 NL/kgVS of biogas instead of about 267 NL/kgVS for non-inoculated runs
Towards the "universal" product detection in crossed beam reactive scattering experiments using "soft" electron impact ionization: Dynamics of vinoxy, acetyl, methyl, formyl, and methylene radicals and ketene formation from the reaction O(3P)+C2H4
No full textRiassunto contributo poste
Crossed molecular beam studies of the O(3P) + C2H4 reaction using "soft" electron impact ionization: Primary products, reaction dynamics and branching ratios
No full textRiassunto di contributo orale selezionato as HOT TOPI
Crossed beam study of the O(3P)+C2H4 reaction using "soft" electron impact ionization: Primary products, reaction dynamics and branching ratios
No full textRiassunto di "selected Hot Topic oral presentation
Extraction of Bio-chemicals for Pharmaceutical and Food Industry from Myrocarpus frondosus, Robinia presudoacacia and Three Quercus Species
No full textThe amount of phytochemicals of interest for the pharmaceutical and food industry extractable from wooden biomasses largely exploited in the furniture and construction sectors as Myrocarpus frondosus, Robinia presudoacacia and three Quercus species were investigated. Adopting modified methanol based extraction protocols, particularly high amounts of antioxidant as ferulic acid 1.596 mg/g, syringaldehyde 0.74 mg/g, vanillic acid 0.327 mg/g and gallic acid 0.114 mg/g were extracted. (E)-coniferyl alcohol, ranging from 0.006 mg/g to 0.099 mg/g, was found in all the samples suggesting its use as an indicator of lignin degradation under alkali hydrolysis
Low-Molecular-Weight Phenols Recovery by Eco-Friendly Extraction from Quercus Spp. Wastes: An Analytical and Biomass-Sustainability Evaluation
No full textIn this work, chemical–physical protocols aimed at the implementation of eco-friendly and biomass-sustainable recovery processes of useful compounds from forestry and/or wood industry wastes were evaluated. Four species of interest in industrial and environmental fields (Quercus cerris, Quercus ilex, and Robinia pseudoacacia from Central Italy, Quercus petraea from France) were submitted to neutral extraction and analyzed by gaschromatography, with mass spectrometry identification of low-molecular-weight phenols. Moreover, Quercus petraea heartwood samples were submitted to three extraction/hydrolysis protocols in an alkaline environment, and the byproducts from the lignin degradation were identified and evaluated. The recovery of bioactive phenols from forestry wastes by applying eco-friendly extractive protocols may reveal a precious strategy for rethinking the management of such wastes, in line with the fundamentals of “circular economy”
Crossed Beam Study of the O(3P) + C2H2 Reaction using Soft Electron Impact Ionization and Variable Crossing Angle: the Dynamics of HCCO and CH2 Formation
No full textRiassunto di Comunicazione Oral
Experimental investigation of neutral-neutral gas-phase reactions involving simple radicals (CN, OH, CH 3 and C 2 ) of relevance in the chemistry of planetary atmospheres
No full textThe reaction O(3P) + C2H2: Primary products and branching ratios as a function of collision energy from crossed beam experiments
No full text- …
