Evolution of anthocyanins during vinification of Merlot and Pinot Noir grapes to wines

The evolution of individual anthocyanins during vinification of Merlot and Pinot Noir grapes was studied using two different winemaking procedures for each grape variety. Additionally, the effect of the applied vinification on the anthocyanin composition of the obtained wine at the end of maceration and wine aged 6 months was investigated and compared with the anthocyanin patterns of the original grape. The dynamics of the extraction process was monitored daily during maceration by analysing the anthocyanins in the must using HPLC. The results showed that the anthocyanin composition of young wines was different from that of the grapes. The proportions of malvidin-3- glucoside and malvidin-acetate were higher in wines than in the grape skins, but this was not the case for malvidin coumarate. Application of different vinification procedures to the same raw material resulted in wines with similar anthocyanin patterns. However, the anthocyanin profiles changed with the ageing of the wines

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Peer reviewe

Nonequilibrium Green function approach to photoionization processes in atoms

We present a quantum kinetic approach for the time-resolved description of many-body effects in photoionization processes in atoms. The method is based on the non-equilibrium Green functions formalism and solves the Keldysh/Kadanoff-Baym equations in second Born approximation. An approximation scheme is introduced and discussed, which provides a complete single-particle description of the continuum, while the atom is treated fully correlated.Comment: 11 pages, 6 figure

Correlation of trans-Lycopene Measurements by the HPLC Method with the Optothermal and Photoacoustic Signals and the Color Readings of Fresh Tomato Homogenates

The trans-lycopene content of fresh tomato homogenates was assessed by means of the laser photoacoustic spectroscopy, the laser optothermal window, micro-Raman spectroscopy, and colorimetry; none of these methods require the extraction from the product matrix prior to the analysis. The wet chemistry method (high-performance liquid chromatography) was used as the absolute quantitative method. Analytical figures of merit for all methods were compared statistically; best linear correlation was achieved for the chromaticity index a* and chroma C*

Real Time Simulation of Power Grid Disruptions

DOE-OE and DOE-SC workshops (Reference 1-3) identified the key power grid problem that requires insight addressable by the next generation of exascale computing is coupling of real-time data streams (1-2 TB per hour) as the streams are ingested to dynamic models. These models would then identify predicted disruptions in time (2-4 seconds) to trigger the smart grid s self healing functions. This project attempted to establish the feasibility of this approach and defined the scientific issues, and demonstrated example solutions to important smart grid simulation problems. These objectives were accomplished by 1) using the existing frequency recorders on the national grid to establish a representative and scalable real-time data stream; 2) invoking ORNL signature identification algorithms; 3) modeling dynamically a representative region of the Eastern interconnect using an institutional cluster, measuring the scalability and computational benchmarks for a national capability; and 4) constructing a prototype simulation for the system s concept of smart grid deployment. The delivered ORNL enduring capability included: 1) data processing and simulation metrics to design a national capability justifying exascale applications; 2) Software and intellectual property built around the example solutions; 3) demonstrated dynamic models to design few second self-healing

Association of Subclinical hypothyroidism with clinical symptomatology

Introduction: Subclinical hypothyroidism (SCH) often remains undetected because of the absence of clinical symptoms or unspecific symptomatology. The aim of the study was to discover whether SCH is associated with relevant clinical symptomatology. Material and methods: The study included 69 consecutive patients, in whom SCH was detected for the first time (level of serum thyrotropin (TSH) between 4.2-20 mU/l with the reference values of free thyroxine (fT4) 10.3-24.45 pmol/l) and a control group of 30 healthy subjects without goiter and with reference values of fT4 and TSH (0.2-4.2 U/l). All participants completed a previously prepared anamnestic questionnaire and blood was taken for evaluation of TSH and fT4. Results: Patients with SCH unlike the control group presented significantly more often with: fatigue, dry skin, insomnia and menorrhagia (in all cases p<0.05). There was a positive correlation between serum concentrations of TSH and percentage of symptoms of hypothyroidism (r= 0.25, p=0.04). Value of TSH over 7.1mU/l was associated with a significantly larger number of symptoms. Conclusion: SCH is associated with fatigue, dry skin, insomnia and menorrhagia, that justifies initiating thyroid replacement therapy at low values of TSH. Instead of the current recommendations for beginning thyroid replacement therapy when TSH >10mU/l, the cut-off value should be moved to TSH >7,1mU/l