Volatiles organic compounds in craft beers produced in Basilicata (Southern Italy).

The volatiles organic compounds of 21 samples of craft beers coming from Basilicata were detected, using a HS-SPME-GC-MS technique. The analysis showed the presence of various compounds (esters, alcohols, and terpenes), which were useful to determinate the aroma profiles of these beers. In addition, this profile was matched with the aroma profile of commercial beers, in order to establish the difference of the aroma profiles.

HS-SPME-GC-MS determination of the scent of taxa (fam. Orchidaceae) from Basilicata (Southern Italy).

The scent of species has been analyzed by using HS-SPME-GC-MS. The sample was collected in Basilicata (Southern Italy). Every species showed a different composition of the scent in the analyses we performed.

A potential host and virus targeting tool against COVID-19: Chemical characterization, antiviral, cytoprotective, antioxidant, respiratory smooth muscle relaxant effects of Paulownia tomentosa Steud.

COronaVIrus Disease 2019 (COVID-19) is a newly emerging infectious disease that spread across the world, caused by the novel coronavirus Severe Acute Respiratory Syndrome CoronaVirus 2 (SARS-CoV-2). Despite the advancements in science that led to the creation of the vaccine, there is still an urgent need for new antiviral drugs effective against SARS-CoV-2. This study aimed to investigate the antiviral effect of Paulownia tomentosa Steud extract against SARS-CoV-2 and to evaluate its antioxidant properties, including respiratory smooth muscle relaxant effects.

Volatile organic compounds from growing in Basilicata (Southern Italy).

SPME-GCMS analysis of vesicles of Sanguinea cultivar showed the presence of limonene (45.63%), sabinene (22.65%), and bicyclogermacrene (10.

Composition and seasonal variation of volatile organic compounds in (Lacaita) Marchi & D'Amato found at Acquapendente (Viterbo, Central Italy).

The main component of the essential oil of is viridiflorol (23.98-42.23%).

On the photochemical reaction of pyridinium salts with nucleophiles.

DFT calculations on the photochemical reaction of 1-n-N-butylpyridinium salt in water with hydroxide anion is in agreement with a singlet state process where the S state at λ = 253 nm can be converted into a Dewar isomer (2-butyl-2-azabicyclo[2.2.0]hexa-2,5-dien-2-yl cation).

Hydrogen atom transfer in the photochemical isomerization of hydrazones of 1,2,4-oxadiazole derivatives.

DFT calculations on the photoisomerization of hydrazones of 1,2,4-oxadiazole derivatives to 1,2,5-triazoles have been performed showing that the reaction occurred through the first excited singlet state. The Z isomer gave the reaction through a hydrogen atom transfer of the hydrazonic nitrogen atom to the nitrogen atom in four position on the oxadiazole ring. In this case, the isomerization was a concerted reaction.

The scent of orchids from Basilicata (Southern Italy).

The scent of species has been performed by using solid-phase microextraction- gas chromatography- mass spectrometry (SPME-GC-MS). The scent of showed the presence of 9-tricosene, 1-nonadecanol and heinecosane. The analysis of the scent of gave α-ionone as the main component.

Characterization of the volatile fraction of mastic oil and mastic gum.

GC-MS of ethyl acetate solutions and HS-SPME-GC-MS of mastic oil and mastic gum showed the presence of α-pinene and β-myrcene as main components of the mixture. In the GC-MS analysis of mastic oil 19 compounds were detected, while mastic gum allowed to detect only twelve compounds. Mastic gum showed the presence of compounds with a higher molecular weight.

Fragrance components of and collected at several sites in Italy and Germany.

The SPME-GC-MS analysis of the aroma components of subsp. , subsp. , var.

The composition of the aroma of orchids in Basilicata (Southern Italy).

The SPME-GC-MS analysis of the aroma components of subsp. and were reported. The relevant components of the scent of were α-amorphene, ethyl oleate, heneicosane, heptadecane, 2-heptadecanone, ethyl elaidate, pentadecane, octadecane, farnesylacetaldehyde, nonadecane, and ethyl stearate.

The Paternò-Büchi reaction - a comprehensive review.

The photochemical reaction between an excited state of carbonyl compounds and an alkene to give the oxetane deriving from a cycloaddition reaction (the Paternò-Büchi reaction) is presented. The mechanism of the reaction is discussed on the basis of kinetic, spectroscopic, and theoretical evidence, showing that the reaction can involve both singlet and triplet excited states of the carbonyl compounds, the high probable presence of an exciplex, and the possible presence of electron transfer processes, and when triplet excited carbonyl compounds are involved, the presence of a biradical intermediate is observed. The reactivity of electron-poor and electron-rich alkenes is discussed.

Aroma components of orchids.

The SPME-GC-MS analysis of the aroma components of , , and were reported. The main components found in were pentadecane, hexadecane, heptadecane and α-farnesene. The same compounds were found in the scent of .

Fragrance components of subsp. and collected in several sites in Italy.

subsp. sample collected at Grisolia showed as main components linalool (17.8%), benzyl benzoate (55.

The chiral photocycloaddition of a cyclohexenone derivative with a chiral alkene. A DFT study.

The photochemical reaction of 3-carboxymethylcyclohexenone with a cyclohexene bearing a chiral auxiliary group has been examined in a DFT study. GIAO simulation of the NMR spectra (DFT/B3LYP/6-311G++(d,2p) level of theory) is not in agreement with the syn-anti-syn product described in the literature for this reaction but is in agreement with the formation of a syn-cis-syn dimer. The analysis of the frontier orbitals involved in this reaction shows that the main interaction is that between the HOMO of the alkene and the LSOMO of the carbonyl compound in its first excited triplet state.

High temperature treatment allows the detection of episesamin in paulownia wood extractives.

The composition and the relative variation of secondary metabolites of S. wood under thermal effect is a little explored area. Wood material was previously thermo-treated at 210 °C for 3 hours using a press vacuum technology.

Pollination features and floral volatiles of Gymnospermium scipetarum (Berberidaceae).

The discovery of few isolated populations of Gymnospermium scipetarum (since now considered as an amphi-Adriatic endemic) in the S-Apennines prompted to investigate, also for conservation purposes, some aspects of its reproductive biology. We aim: (1) to determine if insects play an important role in pollination; (2) to describe the pollinator community; (3) to detect floral scent composition. Experiments of insect exclusion were carried out in the field using 24 flowering individuals: one raceme was capped whereas the nearest one was used as control to ascertain differences in seed set.

Gallic acid as main product in the water extractives of ten.

The autoclave extraction of Hungarian oak (Quercus wood gave 5.3% extractives. The chloroform soluble fraction obtained from the extracts of allows to identify sesamin.

Solid phase microextraction and gas chromatography mass spectrometry analysis of and .

SPME analysis of Roscoe and L. were performed by using a DVB/CARB/PDMS fiber. The SPME analysis of showed that the main components found were camphene (7.

The Use of a Molybdenum Polyoxometalated Compound to Increase the Amount of Extractives from Wood Wastes.

The treatment of wood wastes of L., , , and S. in autoclave in the presence of micrometric crystals of H₃PMoO showed an impressive increase of the amount of extractives.

Chemical and biological evaluation of essential oil from (Falc.) Lipsch. from Garhwal Himalaya collected at different harvesting periods.

The purpose of this study is the determination of chemical composition and antioxidant activity of essential oils (EOs) from (Falc.) Lipsch. Roots have been collected on December of the first plant year (IY) and in April, August and December of the third plant year (I, 6B, D7).

Fragrance components of Platanthera bifolia subsp. osca.

SPME-GC-MS analysis of the scent of Platanthera bifolia subsp. osca collected during the night showed as main components lilac alcohols B, C and D and lilac aldehydes A, B and C. Other significant chemical components were linalool and caryophyllene.

A DFT Study of the Photochemical Dimerization of Methyl 3-(2-Furyl)acrylate and Allyl Urocanate.

A DFT study of the photochemical dimerization of methyl 3-(2-furyl)acrylate is reported. The photochemical reaction gave a mixture of two dimers with high regioselectivity and good stereoselectivity. Calculations showed that benzophenone was able to act as a photosensitizer of the reaction.

Studies on volatile organic compounds of some truffles and false truffles.

Results of solid phase micro-extraction coupled to gas chromatography and mass spectrometry analyses, accomplished on sporophores of 11 species of truffles and false truffles, are reported. Volatile organic compounds (VOCs) found in Gautieria morchelliformis were dimethyl sulphide, 1,3-octadiene, 3,7-dimethyl-1,6-octadien-3-ol, amorphadiene, isoledene and cis-muurola-3,5-diene. In Hymenogaster luteus var.

Oxetane synthesis through the Paternò-Büchi reaction.

The Paternò-Büchi reaction is a photochemical reaction between a carbonyl compound and an alkene to give the corresponding oxetane. In this review the mechanism of the reaction is discussed. On this basis the described use in the reaction with electron rich alkenes (enolethers, enol esters, enol silyl ethers, enanines, heterocyclic compounds has been reported.