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https://www.readbyqxmd.com/read/28439768/discrimination-of-wine-lactic-acid-bacteria-by-raman-spectroscopy
#1
Susan B Rodriguez, Mark A Thornton, Roy J Thornton
Species of Lactobacillus, Pediococcus, Oenococcus, and Leuconostoc play an important role in winemaking, as either inoculants or contaminants. The metabolic products of these lactic acid bacteria have considerable effects on the flavor, aroma, and texture of a wine. However, analysis of a wine's microflora, especially the bacteria, is rarely done unless spoilage becomes evident, and identification at the species or strain level is uncommon as the methods required are technically difficult and expensive. In this work, we used Raman spectral fingerprints to discriminate 19 strains of Lactobacillus, Pediococcus, and Oenococcus...
April 24, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28437740/stabilization-of-metal-loid-s-in-two-contaminated-agricultural-soils-comparing-biochar-to-its-non-pyrolysed-source-material
#2
Lukáš Trakal, Irene Raya-Moreno, Kerry Mitchell, Luke Beesley
Two metal(loid) contaminated agricultural soils were amended with grape stalk (wine production by-product)-derived biochar as well as its pre-pyrolysed origin material, to investigate their geochemical impacts on As, Cr, Cu and Zn. Detailed physico-chemical evaluation combined with a column leaching test determined the retention of metal(loid)s from soil solution by each amendments. A pot experiment measured metal(loid)s in soil pore water and their uptake to ryegrass when the amendments were mixed into soils at 1 and 5% (w/w)...
April 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28437700/nanomolar-electrochemical-detection-of-caffeic-acid-in-fortified-wine-samples-based-on-gold-palladium-nanoparticles-decorated-graphene-flakes
#3
Kokulnathan Thangavelu, Nehru Raja, Shen-Ming Chen, Wei-Cheng Liao
Amalgamation of noble metal nanomaterials on graphene flakes potentially paves one way to improve their physicochemical properties. This paper deals with the simultaneous electrochemical deposition of gold and palladium nanoparticles on graphene flakes (Au/PdNPs-GRF) for the sensitive determination of caffeic acid (CA). The physiochemical properties of the prepared Au/PdNPs-GRF was characterized by using numerous analytical techniques such as scanning electron microscopy, electron dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, Raman spectroscopy and electrochemical impedance spectroscopy...
April 13, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28436828/sensory-profile-and-volatile-aroma-composition-of-reduced-alcohol-merlot-wines-fermented-with-metschnikowia-pulcherrima-and-saccharomyces-uvarum
#4
C Varela, A Barker, T Tran, A Borneman, C Curtin
Strategies for production of wines containing lower alcohol concentrations are in strong demand, for reasons of quality, health, and taxation. Development and application of wine yeasts that are less efficient at transforming grape sugars into ethanol has the potential to allow winemakers the freedom to make lower alcohol wines from grapes harvested at optimal ripeness, without the need for post-fermentation processes aimed at removing ethanol. We have recently shown that two non-conventional wine yeast species Metschnikowia pulcherrima and Saccharomyces uvarum were both able to produce wine with reduced alcohol concentration...
April 12, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28436036/oxidative-behavior-of-catechin-in-the-presence-of-inactive-dry-yeasts-a-comparison-with-sulfur-dioxide-ascorbic-acid-and-glutathione
#5
Piergiorgio Comuzzo, Rosanna Toniolo, Franco Battistutta, Marion Lizee, Rossella Svigelj, Roberto Zironi
BACKGROUND: The antioxidant capacity of an inactive dry yeast preparation (YD) was investigated by conventional analytical methods (spectrophotometry, HPLC) as well as by cyclic voltammetry (CV), in a (+)-catechin model wine and compared with certain of the most common antioxidants found in wine: sulfur dioxide, ascorbic acid and glutathione. RESULTS: Sulfur dioxide (SO2 ) was the highest performing substance in protecting (+)-catechin against browning, followed by ascorbic acid and the YD preparation...
April 24, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28434611/alcohol-intake-and-risk-of-rosacea-in-us-women
#6
Suyun Li, Eunyoung Cho, Aaron M Drucker, Abrar A Qureshi, Wen-Qing Li
BACKGROUND: The epidemiologic association between alcohol and rosacea is unclear and inconsistent based on the previous cross-sectional or case-control studies. OBJECTIVE: We conducted a cohort study to determine the association between alcohol intake and the risk of rosacea in women. METHODS: A total of 82,737 women were included from the Nurses' Health Study II (1991-2005). Information on alcohol intake was collected every 4 years during follow-up...
April 1, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28434201/how-much-alcohol-is-consumed-outside-of-the-lifetime-risk-guidelines-in-australia
#7
Sarah Callinan, Michael Livingston, Robin Room, Paul M Dietze
INTRODUCTION AND AIMS: This study aims to estimate the prevalence of long-term risky drinking within the Australian population and the proportion of standard drinks that is consumed outside of the long-term risk (LTR) guidelines of two Australian standard drinks (ASD) per day. DESIGN AND METHODS: Recruited by phone, 2020 Australian adults with an oversampling of risky drinkers were asked detailed questions about how much alcohol they consumed at a range of locations in 2013...
April 23, 2017: Drug and Alcohol Review
https://www.readbyqxmd.com/read/28434156/paediatric-sepsis-old-wine-in-new-bottles
#8
Luregn J Schlapbach, Etienne Javouhey, Nicolaas J G Jansen
No abstract text is available yet for this article.
April 22, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/28433489/analysis-of-the-oligosaccharides-in-japanese-rice-wine-sake-by-hydrophilic-interaction-liquid-chromatography-time-of-flight-mass-spectrometry
#9
Masafumi Tokuoka, Chihiro Honda, Akira Totsuka, Hitoshi Shindo, Masaru Hosaka
A traditional Japanese alcoholic beverage, sake, contains several oligosaccharides, which are associated with the taste of sake; however, little is known about the specific molecular species and concentrations of oligosaccharides in sake. Here, we developed an analytical method using hydrophilic interaction liquid chromatography-time-of-flight/mass spectrometry (HILIC-TOF/MS) which successfully detects the oligosaccharides in sake. A series of oligosaccharides with successive degree of polymerization (DP) values up to 18 were identified in sake for the first time, which we have named sake oligosaccharides (SAOs)...
April 19, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28433466/orosensory-responsiveness-and-alcohol-behaviour
#10
Margaret Thibodeau, Martha Bajec, Gary Pickering
Consumption of alcoholic beverages is widespread through much of the world, and significantly impacts human health and well-being. We sought to determine the contribution of orosensation ('taste') to several alcohol intake measures by examining general responsiveness to taste and somatosensory stimuli in a convenience sample of 435 adults recruited from six cohorts. Each cohort was divided into quantiles based on their responsiveness to sweet, sour, bitter, salty, umami, metallic, and astringent stimuli, and the resulting quantiles pooled for analysis (Kruskal-Wallis ANOVA)...
April 19, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28430959/expression-immunogenicity-and-variation-of-iron-regulated-surface-protein-a-from-bovine-isolates-of-staphylococcus-aureus
#11
N Misra, T F Wines, C L Knopp, M A McGuire, J K Tinker
Staphylococcus aureus iron-regulated surface protein A (IsdA) is a fibrinogen and fibronectin adhesin that also contributes to iron sequestration and resistance to innate immunity. IsdA is conserved in human isolates and has been investigated as a human vaccine candidate. Here we report the expression of isdA, the efficacy of anti-IsdA responses, and the existence of IsdA sequence variants from bovine Staphylococcus. Clinical staphylococci were obtained from U.S. dairy farms and assayed by PCR for the presence and expression of isdA...
April 19, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28430928/typology-and-dynamics-of-heavier-drinking-styles-in-great-britain-1978-2010
#12
Robin C Purshouse, Alan Brennan, Daniel Moyo, James Nicholls, Paul Norman
Aims: To identify a typology of heavier drinking styles in Great Britain and to identify socio-demographic trends in the typology over the period 1978-2010. Methods: We applied multiple correspondence analysis and agglomerative hierarchical clustering to beverage-specific quantity-frequency measures of alcohol consumption in the repeated cross-sectional General Lifestyle Survey of Great Britain, 1978-2010. The cluster analysis focuses on the 60,043 adult respondents over this period reporting average drinking levels above the UK Government guidelines...
May 1, 2017: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
https://www.readbyqxmd.com/read/28427650/effect-of-ultrasound-on-the-interaction-between-epicatechin-gallate-and-bovine-serum-albumin-in-a-model-wine
#13
Qing-An Zhang, Xi-Zhe Fu, Juan Francisco García Martín
Ultrasound is considered as a potential novel technique for improving the quality of some wines. In this paper, a model wine firstly was constructed with the standards of (-)-epicatechin gallate (ECG) and bovine serum albumin (BSA) as target compounds. Then, the experiments were conducted to investigate the effect of ultrasonic irradiation on the binding properties between ECG and BSA including quenching mechanism, binding parameters, binding forces, energy transfer distance and conformational changes determined by spectral analysis...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28427533/influence-of-high-hydrostatic-pressure-technology-on-wine-chemical-and-sensorial-characteristics-potentialities-and-drawbacks
#14
Cláudia Nunes, Mickael C Santos, Jorge A Saraiva, Sílvia M Rocha, Manuel A Coimbra
During last years, scientific research on high hydrostatic pressure (HHP) as a nonthermal processing technology for preservation or aging of wine has increased substantially. HHP between 200 and 500MPa is able to inactivate bacteria and yeasts in red and white wines, suggesting that it may be used for wine preservation. However, these treatments have been shown to promote changes on sensorial and physicochemical characteristics in both red and white wines, not immediately in the first month, but along storage...
2017: Advances in Food and Nutrition Research
https://www.readbyqxmd.com/read/28424673/genome-scale-reconstruction-of-the-metabolic-network-in-oenococcus-oeni-to-assess-wine-malolactic-fermentation
#15
Sebastián N Mendoza, Pablo M Cañón, Ángela Contreras, Magdalena Ribbeck, Eduardo Agosín
Oenococcus oeni is the main responsible agent for malolactic fermentation in wine, an unpredictable and erratic process in winemaking. To address this, we have constructed and exhaustively curated the first genome-scale metabolic model of Oenococcus oeni, comprising 660 reactions, 536 metabolites and 454 genes. In silico experiments revealed that nutritional requirements are predicted with an accuracy of 93%, while 14 amino acids were found to be essential for the growth of this bacterial species. When the model was applied to determine the non-growth associated maintenance, results showed that O...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28424625/role-of-mitochondrial-retrograde-pathway-in-regulating-ethanol-inducible-filamentous-growth-in-yeast
#16
Beatriz González, Albert Mas, Gemma Beltran, Paul J Cullen, María Jesús Torija
In yeast, ethanol is produced as a by-product of fermentation through glycolysis. Ethanol also stimulates a developmental foraging response called filamentous growth and is thought to act as a quorum-sensing molecule. Ethanol-inducible filamentous growth was examined in a small collection of wine/European strains, which validated ethanol as an inducer of filamentous growth. Wine strains also showed variability in their filamentation responses, which illustrates the striking phenotypic differences that can occur among individuals...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28424010/olfactory-development-part-1-function-from-fetal-perception-to-adult-wine-tasting
#17
Harvey B Sarnat, Laura Flores-Sarnat, Xing-Chang Wei
Discrimination of odorous molecules in amniotic fluid occur after 30 weeks' gestation; fetuses exhibit differential responses to maternal diet. Olfactory reflexes enable reliable neonatal testing. Olfactory bulbs can be demonstrated reliably by MRI after 30 weeks' gestation, and their hypoplasia or aplasia also documented by late prenatal and postnatal MRI. Olfactory axons project from nasal epithelium to telencephalon before olfactory bulbs form. Fetal olfactory maturation remains incomplete at term for neuronal differentiation, synaptogenesis, myelination, and persistence of the transitory fetal ventricular recess...
May 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28421982/simultaneous-determination-of-volatile-organic-compounds-in-commercial-alcoholic-beverages-by-gas-chromatography-with-flame-ionization-detection
#18
Hyung Min Kim, Gun Yang, Jung Yoon Kim, Sang Jun Yoon, Byong-Kyu Shin, Jeongmi Lee, Jeong Hill Park, Sung Won Kwon
A simple and fast method was developed for the determination of volatile organic compounds in alcoholic beverages. Eleven volatile organic compounds (acetaldehyde, methanol, 2-propanol, <italic>tert</italic>-butanol, 1-propanol, ethyl acetate, 2-butanol, isobutanol, 1-butanol, 3-methyl-1butanol, and 2-methyl-1-butanol) in alcoholic beverages were analyzed with a simple direct-injection method using GC with flame ionization detection. These compounds should be monitored in the QC of production processes because they are detrimental to human health...
April 18, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28421942/the-personal-touch
#19
Katherine Caddey
The story on your Facebook page about nurses in Denmark breaking protocol to give a dying man a glass of wine and a cigarette (11 April) reminded me of the time we did the same thing for one of our patients on night duty.
April 19, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28421745/molecular-approach-of-the-synergistic-effect-on-astringency-elicited-by-mixtures-of-flavanols
#20
Alba M Ramos-Pineda, Ignacio García-Estévez, Natércia Fernandes Brás, Eva M Martin Del Valle, Montserrat Duenas, M Teresa Escribano-Bailon
The interactions between salivary proteins and wine flavanols (catechin, epicatechin and mixtures catechin+epicatechin) have been studied by HPLC-DAD, Isothermal Titration Microcalorimetry and Molecular Dynamics simulations. Chromatographic results suggest that the presence of these flavanol mixtures could facilitate the formation of precipitates to the detriment of soluble aggregates. The comparison between the thermodynamic parameters obtained showed remarkable higher negative values of ΔG in the system containing the mixture of both flavanols in comparison to the systems containing individual flavanols, indicating a more favourable scenario in the mixing system...
April 19, 2017: Journal of Agricultural and Food Chemistry
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