6 research outputs found
sj-docx-1-asp-10.1177_00037028231203015 - Supplemental material for On-Line Monitoring of Enzymatic Degumming of Soybean Oil Using Near-Infrared Spectroscopy
Supplemental material, sj-docx-1-asp-10.1177_00037028231203015 for On-Line Monitoring of Enzymatic Degumming of Soybean Oil Using Near-Infrared Spectroscopy by Margherita Tonolini, Joanna Wawrzynczyk, Per Munk Nielsen and Søren Balling Engelsen in Applied Spectroscopy</p
GC-MS Metabolite Profiling of Extreme Southern Pinot noir Wines: Effects of Vintage, Barrel Maturation, and Fermentation Dominate over Vineyard Site and Clone Selection
Wine is an extremely complex beverage
that contains a multitude
of volatile and nonvolatile compounds. This study investiged the effect
of vineyard site and grapevine clone on the volatile profiles of commercially
produced Pinot noir wines from central Otago, New Zealand. Volatile
metabolites in Pinot noir wines produced from five grapevine clones
grown on six vineyard sites in close proximity, over two consecutive
vintages, were surveyed using gas chromatographyâmass spectrometry
(GC-MS). The raw GC-MS data were processed using parallel factor analysis
(PARAFAC2), and final metabolite data were analyzed by principal component
analysis (PCA). Winemaking conditions, vintage, and barrel maturation
were found to be the most dominant factors. The effects of vineyard
site and clone were mostly vintage dependent. Although four compounds
including β-citronellol, homovanillyl alcohol, <i>N</i>-(3-methylbutyl)Âacetamide, and <i>N</i>-(2-phenylethyl)Âacetamide
discriminated the vineyard sites independent of vintage, Pinot noir
wines from different clones were only partially discriminated by PCA,
and marker compound selection remained challenging
Investigations of La Rioja Terroir for Wine Production Using <sup>1</sup>H NMR Metabolomics
In this study, La Rioja wine terroir was investigated
by the use
of <sup>1</sup>H NMR metabolomics on must and wine samples. Rioja
is a small wine region in central northern Spain which can geographically
be divided into three subareas (Rioja Alta, Rioja Baja, and Rioja
Alavesa). The winemaking process from must, through alcoholic and
malolactic fermentation, was followed by NMR metabolomics and chemometrics
of nine wineries in the Rioja subareas (terroirs). Application of
interval extended canonical variate analysis (iECVA) showed discriminative
power between wineries which are geographically very close. Isopentanol
and isobutanol compounds were found to be key biomarkers for this
differentiation
Investigations of La Rioja Terroir for Wine Production Using <sup>1</sup>H NMR Metabolomics
In this study, La Rioja wine terroir was investigated
by the use
of <sup>1</sup>H NMR metabolomics on must and wine samples. Rioja
is a small wine region in central northern Spain which can geographically
be divided into three subareas (Rioja Alta, Rioja Baja, and Rioja
Alavesa). The winemaking process from must, through alcoholic and
malolactic fermentation, was followed by NMR metabolomics and chemometrics
of nine wineries in the Rioja subareas (terroirs). Application of
interval extended canonical variate analysis (iECVA) showed discriminative
power between wineries which are geographically very close. Isopentanol
and isobutanol compounds were found to be key biomarkers for this
differentiation
Investigations of La Rioja Terroir for Wine Production Using <sup>1</sup>H NMR Metabolomics
In this study, La Rioja wine terroir was investigated
by the use
of <sup>1</sup>H NMR metabolomics on must and wine samples. Rioja
is a small wine region in central northern Spain which can geographically
be divided into three subareas (Rioja Alta, Rioja Baja, and Rioja
Alavesa). The winemaking process from must, through alcoholic and
malolactic fermentation, was followed by NMR metabolomics and chemometrics
of nine wineries in the Rioja subareas (terroirs). Application of
interval extended canonical variate analysis (iECVA) showed discriminative
power between wineries which are geographically very close. Isopentanol
and isobutanol compounds were found to be key biomarkers for this
differentiation
Antibiotic Treatment Preventing Necrotising Enterocolitis Alters Urinary and Plasma Metabolomes in Preterm Pigs
Necrotising enterocolitis
(NEC) is a serious gut inflammatory condition
in premature neonates, onset and development of which depend on the
gut microbiome. Attenuation of the gut microbiome by antibiotics can
reduce NEC incidence and severity. However, how the antibiotics-suppressed
gut microbiome affects the whole-body metabolism in NEC-sensitive
premature neonates is unknown. In formula-fed preterm pigs, used as
a model for preterm infants, plasma and urinary metabolomes were investigated
by LCâMS and <sup>1</sup>H NMR, with and without antibiotic
treatment immediately after birth. While it reduced the gut microbiome
density and NEC lesions as previously reported, the antibiotic treatment
employed in the current study affected the abundance of 44 metabolites
in different metabolic pathways. In antibiotics-treated pigs, tryptophan
metabolism favored the kynurenine pathway, relative to the serotonin
pathway, as shown by specific metabolites. Metabolites associated
with the gut microbiome, including 3-phenyllactic acid, 4-hydroxyphenylacetic
acid, and phenylacetylglycine, all from phenylalanine, and three bile
acids showed lower levels in the antibiotics-treated pigs where the
gut microbiome was extensively attenuated. Findings in the current
study warrant further investigation of metabolic and developmental
consequences of antibiotic treatment in preterm neonates