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https://www.readbyqxmd.com/read/28734363/multi-energy-calibration-applied-to-atomic-spectrometry
#1
Alex Virgilio, Daniel A Gonçalves, Tina McSweeney, José A Gomes Neto, Joaquim A Nóbrega, George L Donati
Multi-energy calibration (MEC) is a novel strategy that explores the capacity of several analytes of generating analytical signals at many different wavelengths (transition energies). Contrasting with traditional methods, which employ a fixed transition energy and different analyte concentrations to build a calibration plot, MEC uses a fixed analyte concentration and multiple transition energies for calibration. Only two calibration solutions are required in combination with the MEC method. Solution 1 is composed of 50% v v(-1) sample and 50% v v(-1) of a standard solution containing the analytes...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28733233/estimation-of-dietary-intake-and-target-hazard-quotients-for-metals-by-consumption-of-wines-from-the-canary-islands
#2
Angel J Gutiérrez, Carmen Rubio, Isabel M Moreno, A Gustavo González, Dailos Gonzalez-Weller, Naouel Bencharki, Arturo Hardisson, Consuelo Revert
This paper describes the impact of mineral content on wines and assesses the potential health risk from consuming these wines from Canary Islands. The metal content (B, Ca, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, Pb, Zn) of red wines belonging to different regions in the Canary Islands was determined by ICP-OES. The studied wine regions were Valle de la Orotava, Tacoronte-Acentejo, Ycoden-Daute-Isora, Abona and Valle de Güimar in Tenerife Island and only one in La Gomera and La Palma Islands. According to the content found, elements could be classified in two categories: the main group including Ca, K, Mg, Na, and the ''minor'' set consisting of B, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, Pb and Zn...
July 18, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28731564/alcohol-related-knowledge-and-alcohol-related-norms-in-four-to-six-year-olds-evidence-from-the-dutch-electronic-appropriate-beverage-task
#3
Carmen Voogt, Roy Otten, Marloes Kleinjan, Rutger Engels, Emmanuel Kuntsche
BACKGROUND: Limited research is available on children's alcohol-related knowledge and alcohol-related norms, yet a better comprehension of these factors may be crucial in explaining alcohol use later in life. This study provides insights into alcohol-related knowledge and alcohol-related norms in four- to six-year-olds. METHODS: Participating children (N=329; 48.9% boys) were shown, on a tablet, 18 drawings depicting 72 male and female adults and/or children in various situations and were asked to indicate what the depicted persons drank by touching one of 12 depicted beverages (four alcoholic; eight non-alcoholic)...
July 21, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28730306/disposable-electrochemical-immunosensor-for-brettanomyces-bruxellensis-based-on-nanogold-reduced-graphene-oxide-hybrid-nanomaterial
#4
Boryana Borisova, María L Villalonga, María Arévalo-Villena, Abderrahmane Boujakhrout, Alfredo Sánchez, Concepción Parrado, José M Pingarrón, Ana Briones-Pérez, Reynaldo Villalonga
The assembly of a novel disposable amperometric immunosensor for the detection of the red wine spoilage yeast Brettanomyces bruxellensis is reported. The nanostructured sensing interface was prepared by first coating carbon screen printed electrodes with a gold nanoparticles-reduced graphene oxide hybrid nanomaterial, which was then modified with 3-mercaptopropionic acid to further immobilize specific antibodies for B. bruxellensis via a carbodiimide-coupling reaction. The functionalized electrode allowed the amperometric detection of B...
July 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28729784/discoloration-of-different-esthetic-restorative-materials-a-spectrophotometric-evaluation
#5
Matteo Ceci, Matteo Viola, Davide Rattalino, Riccardo Beltrami, Marco Colombo, Claudio Poggio
OBJECTIVE: A crucial property of esthetic restorative materials is their long-term color stability. The aim of this in vitro study was to evaluate the color stability of esthetic restorative materials (one microfilled flowable composite, one nanofilled composite, one nanoybrid composite, one microfilled composite, and one nanoybrid ormocer-based composite) after surface roughening with cola and exposure to different staining solutions (coffee and red wine). MATERIALS AND METHODS: All materials were polymerized into silicone rubber rings (2 mm × 6 mm × 8 mm) to obtain 150 specimens identical in size...
April 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28721728/reduced-production-of-higher-alcohols-by-saccharomyces-cerevisiae-in-red-wine-fermentation-by-simultaneously-overexpressing-bat1-and-deleting-bat2
#6
Lijuan Ma, Shiyong Huang, Liping Du, Ping Tang, Dongguang Xiao
In red wine, the contents of higher alcohols and ethyl carbamate (EC) are two significant health concerns. To reduce the production of higher alcohols by wine yeast YZ22 with low production of EC, one BAT2 was replaced by a BAT1 expression cassette first and then another BAT2 was deleted to obtain the mutant SYBB3. Real-Time quantitative PCR showed that the relative expression level of BAT1 in SYBB3 improved 28 times compared with that in YZ22. The yields of isobutanol and 3-methyl-1-butanol produced by mutant SYBB3 reduced by 39...
July 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28718057/immobilized-enzymes-from-geotrichum-spp-improve-wine-quality
#7
Yao Lu, Jing Zhu, Junling Shi, Yanlin Liu, Dongyan Shao, Chunmei Jiang
Higher alcohols are the byproducts of yeasts in alcohol fermentation and are harmful to human health at high concentrations. In this study, immobilized crude enzymes extracted from Geotrichum spp. strains S12 and S13 were separately employed to treat red wine, then GC and GC-MS analyses were used to determine the profiles of volatile compounds in untreated and treated wine samples. Immobilized enzymes from S13 (SA-S13E) were more active in decreasing higher alcohols than enzymes from S12. Conditions for preparing SA-S13E were optimized, and best results were obtained at a sodium alginate concentration of 35 g/L, calcium chloride of 20 g/L, and crude enzyme dosage of 3 mL...
July 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28704617/resveratrol-prevents-angiotensin-ii-induced-hypertrophy-of-vascular-smooth-muscle-cells-through-the-transactivation-of-growth-factor-receptors
#8
Ekhtear Hossain, Madhu B Anand-Srivastava
We previously showed that the augmented levels of endogenous angiotensin II (Ang II) contribute to vascular smooth muscle cell (VSMC) hypertrophy through the transactivation of growth factor receptors in spontaneously hypertensive rats. Resveratrol (RV), a polyphenolic component of red wine, has also been shown to attenuate Ang II-evoked VSMC hypertrophy, however, the molecular mechanism mediating this response is obscure. The present study is therefore undertaken to examine if RV could prevent Ang II-induced VSMC hypertrophy through the transactivation of growth factor receptor and associated signaling pathways...
July 13, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28702941/an-application-of-partial-least-squares-for-identifying-dietary-patterns-in-bone-health
#9
Tiffany C Yang, Lorna S Aucott, Garry G Duthie, Helen M Macdonald
In a large cohort of older women, a mechanism-driven statistical technique for assessing dietary patterns that considers a potential nutrient pathway found two dietary patterns associated with lumbar spine and femoral neck bone mineral density. A "healthy" dietary pattern was observed to be beneficial for bone mineral density. INTRODUCTION: Dietary patterns represent a broader, more realistic representation of how foods are consumed, compared to individual food or nutrient analyses. Partial least-squares (PLS) is a data-reduction technique for identifying dietary patterns that maximizes correlation between foods and nutrients hypothesized to be on the path to disease, is more hypothesis-driven than previous methods, and has not been applied to the study of dietary patterns in relation to bone health...
December 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/28693629/resveratrol-has-dose-dependent-effects-on-dna-fragmentation-and-mitochondrial-activity-of-ovine-secondary-follicles-cultured-in-vitro
#10
T J S Macedo, V R P Barros, A P O Monte, B B Gouveia, M É S Bezerra, A Y P Cavalcante, R S Barberino, V G Menezes, M H T Matos
The worldwide consumption of red wine, nuts and grapes has resulted in increased human exposure to resveratrol, which could affect reproductive function. However, the effect of resveratrol on in vitro culture of early-stage ovarian follicles has never been investigated. The aims of the present study were to evaluate the effect of resveratrol on sheep secondary follicle morphology, growth, DNA fragmentation, intracellular levels of glutathione (GSH) and active mitochondria. Secondary follicles were isolated from the ovaries and cultured for 18 days in supplemented α-MEM+ (control medium) or in control medium containing resveratrol (2, 10 or 30 µM)...
July 11, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28689323/a-sensitive-colorimetric-assay-system-for-nucleic-acid-detection-based-on-isothermal-signal-amplification-technology
#11
Bo Hu, Jing Guo, Ying Xu, Hua Wei, Guojie Zhao, Yifu Guan
Rapid and accurate detection of microRNAs in biological systems is of great importance. Here, we report the development of a visual colorimetric assay which possesses the high amplification capabilities and high selectivity of the rolling circle amplification (RCA) method and the simplicity and convenience of gold nanoparticles used as a signal indicator. The designed padlock probe recognizes the target miRNA and is circularized, and then acts as the template to extend the target miRNA into a long single-stranded nucleotide chain of many tandem repeats of nucleotide sequences...
July 8, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28684672/color-stability-of-new-esthetic-restorative-materials-a-spectrophotometric-analysis
#12
Claudio Poggio, Lodovico Vialba, Anna Berardengo, Ricaldone Federico, Marco Colombo, Riccardo Beltrami, Andrea Scribante
The aim of this in vitro study was to evaluate and compare the color stability of different esthetic restorative materials (one microfilled composite, one nanofilled composite, one nanoceramic composite, one microfilled hybrid composite, one microfilled hybrid composite, one nanohybrid Ormocer based composite and one supra-nano spherical hybrid composite) after exposure to different staining solutions (physiological saline, red wine, coffee). All materials were prepared and polymerized into silicon rings (2 mm × 6 mm × 8 mm) to obtain specimens identical in size...
July 6, 2017: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/28683524/enhancing-antioxidant-activities-of-wines-by-addition-ofwhite-rose-extract
#13
Hyunbin Seong, Jieun Heo, Kyun Hee Lee, Yoon Bok Lee, Yun Bae Kim, Nam Soo Han
White rose petal extract (WRE) contains large amounts of phenolic compounds and is considered edible. In this study, red and white wines were prepared by the addition of WRE (0.10% or 0.25%, w/v), followed by fermentation at 25°C for 15 days. The fermentation profiles, colors, sensory test results, and antioxidant activities of wines were compared. As reported herein, the fermentation profiles such as the pH, CO2 production rate, and final ethanol concentration were not affected by the addition of WRE, but a slow consumption rate of sugar was observed in 0...
July 7, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28678973/translucency-and-color-stability-of-resin-composite-and-dental-adhesives-as-modeling-liquids-a-one-year-evaluation
#14
José Augusto Sedrez-Porto, Eliseu Aldrighi Münchow, Maximiliano Sérgio Cenci, Tatiana Pereira-Cenci
The aim of this study is to evaluate the influence of modeling liquids on the translucency and color shade of resin composites (RCs) after one year of storage. RC specimens were prepared using either a conventional insertion technique (control; without modeling liquid) or a restorative dental modeling insertion technique (RDMIT) with dental adhesives as modeling liquids (Scotchbond™ Multi-Purpose [SBMP; 3M ESPE] or Adper™ Single Bond 2 [SB; 3M ESPE]). The initial colors of the specimens were obtained with a digital spectrophotometer and the CIEL*a*b* color system, after which specimens were stored (37°C) in distilled water or red wine for 12 months...
July 3, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28677796/resveratrol-suppresses-thyroid-hormone%C3%A2-induced-osteocalcin-synthesis-in-osteoblasts
#15
Kazuhiko Fujita, Haruhiko Tokuda, Shingo Kainuma, Gen Kuroyanagi, Naohiro Yamamoto, Rie Matsushima-Nishiwaki, Atsushi Harada, Osamu Kozawa, Takanobu Otsuka
Resveratrol, a polyphenolic compound that is present in grape skins, berries and red wine, may be beneficial for human health through its anti‑inflammatory and anti‑oxidant effects. It has been previously demonstrated that resveratrol exerts its biological effects primarily via sirtuin 1 (SIRT1) activation. We previously reported that triiodothyronine (T3) induces osteocalcin synthesis in osteoblast‑like MC3T3‑E1 cells, and that p38 mitogen‑activated protein (MAP) kinase mediates the T3‑stimulated synthesis of osteocalcin...
June 28, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28660008/paradoxical-effect-of-nonalcoholic-red-wine-polyphenol-extract-provinols%C3%A2-in-the-regulation-of-cyclooxygenases-in-vessels-from-zucker-fatty-rats-fa-fa
#16
Abdelali Agouni, Hadj Ahmed Mostefai, Anne-Hélène Lagrue, Martina Sladkova, Philippe Rouet, Franck Desmoulin, Olga Pechanova, Maria Carmen Martínez, Ramaroson Andriantsitohaina
The aim of this work was to study the vascular effects of dietary supplementation of a nonalcoholic red wine polyphenol extract, Provinols, in Zucker fatty (ZF) obese rats. ZF or lean rats received diet supplemented or not with Provinols for 8 weeks. Vasoconstriction in response to phenylephrine (Phe) was then assessed in small mesenteric arteries (SMA) and the aorta with emphasis on the contribution of cyclooxygenases (COX). Although no difference in vasoconstriction was observed between ZF and lean rats both in SMA and the aorta, Provinols affected the contribution of COX-derived vasoconstrictor agents...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28653743/genetic-diversity-and-pectinolytic-activity-of-epiphytic-yeasts-from-grape-carposphere
#17
M Cilião Filho, M B D Bertéli, J S Valle, L D Paccola-Meirelles, G A Linde, F G Barcellos, N B Colauto
The genetic diversity of epiphytic yeasts from grape carposphere is susceptible to environmental variations that determine the predominant carposphere microbiota. Understanding the diversity of yeasts that inhabit grape carposphere in different environments and their pectinolytic activity is a way to understand the biotechnological potential that surrounds us and help improve winemaking. Therefore, this study aimed to evaluate the pectinolytic activity and characterize the genetic diversity of isolated epiphytic yeasts from grape carposphere...
June 20, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28651079/a-survey-of-oenophages-during-wine-making-reveals-a-novel-group-with-unusual-genomic-characteristics
#18
Cécile Philippe, Fety Jaomanjaka, Olivier Claisse, Rémi Laforgue, Julie Maupeu, Melina Petrel, Claire Le Marrec
Oenophages have so far been mostly isolated from red wines under malolactic fermentation (MLF), and correspond to temperate or ex-temperate phages of Oenococcus oeni. Their genomes are clustered into 4 integrase gene sequence groups, which are also related to the chromosomal integration site. Our aims were to survey the occurrence of oenophages in a broader and more diverse collection of samples than those previously explored. Active phages were isolated from 33 out of 166 samples, which mostly originated from must and MLF...
June 17, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28643477/red-wine-polyphenols-do-not-improve-obesity-associated-insulin-resistance-a-randomized-controlled-trial
#19
Jorn Woerdeman, Daniele Del Rio, Luca Calani, Etto C Eringa, Yvo M Smulders, Erik H Serné
Preclinical studies have suggested that polyphenols extracted from red wine (RWPs) favorably affect insulin sensitivity, but controversy exists on whether RWPs exert similar effects in humans. This study aimed to determine whether RWPs improve insulin sensitivity in obese volunteers. Obese (BMI>30) volunteers were randomly allocated to RWPs 600 mg/day (n = 14) or matched placebo (n = 15) in a double-blind fashion (parallel-arm) for 8 weeks. Subjects were investigated at baseline and at the end of the study (EOS)...
June 23, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28642918/color-stability-of-esthetic-restorative-materials-a-spectrophotometric-analysis
#20
Claudio Poggio, Matteo Ceci, Riccardo Beltrami, Maria Mirando, Jaffal Wassim, Marco Colombo
Objective: The aim of this in vitro study was to evaluate the color stability of different restorative materials (one microfilled composite, one nanofilled composite, one nanohybrid composite and one Ormocer-based composite) after exposure to different staining solutions (coffee, coca-cola and red wine). Material and methods: All materials were polymerized into silicon rings (2 mm ×6 mm ×8 mm) to obtain specimens identical in size. Thirty cylindrical specimens of each material were prepared. They were immersed in staining solutions over a 28-day test period...
December 2016: Acta Biomaterialia Odontologica Scandinavica
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