scholarly journals Classification of Botrytized Wines Based on Producing Technology Using Flow-Modulated Comprehensive Two-Dimensional Gas Chromatography

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 876
Author(s):  
Olga Vyviurska ◽  
Nemanja Koljančić ◽  
Ha Anh Thai ◽  
Roman Gorovenko ◽  
Ivan Špánik
Keyword(s):  
Gas Chromatography ◽  
Two Dimensional ◽  
Wine Quality ◽  
Quality Of Results ◽  
Chiral Compounds ◽  
Enantiomeric Ratio ◽  
Significant Difference ◽  
Grape Skins

The enantiomeric ratio of chiral compounds is known as a useful tool to estimate wine quality as well as observe an influence of wine-producing technology. The incorporation of flow-modulated comprehensive two-dimensional gas chromatography in this type of analysis provides a possibility to improve the quality of results due to the enhancement of separation capacity and resolution. In this study, flow-modulated comprehensive two-dimensional gas chromatography was incorporated in enantioselective analysis to determine the influence of winemaking technology on specific features of botrytized wines. The samples included Tokaj essences (high-sugar wines), Tokaj botrytized wines and varietal wines (Furmint, Muscat Lunel, Lipovina) and wines maturated on grape peels. The obtained data was processed with hierarchic cluster analysis to reveal variations in composition and assess classification ability for botrytized wines. A significant difference between the samples was observed for the enantiomeric distribution of ethyl lactate and presence of monoterpene alcohols. The varietal wines were successfully separated from the other types, which showed more similar results and could be divided with additional parameters. We observed a correlation between the botrytized wines and the varietal wines fermented with grape skins. As to the essences produced from juice of botrytized grapes, the results were quite similar to those of the botrytized wines, even though monoterpenes were not detected in the extracts.

scholarly journals Two-dimensional Placement Using Tabu Search

VLSI Design ◽  
2001 ◽  
Vol 12 (1) ◽  
pp. 13-23
Author(s):  
John M. Emmert ◽  
Dinesh K. Bhatia
Keyword(s):  
Simulated Annealing ◽  
Tabu Search ◽  
Optimization Technique ◽  
Vlsi Design ◽  
Two Dimensional ◽  
Search Technique ◽  
Quality Of Results ◽  
Circuit Performance ◽  
Speed Up

Search based placement of modules is an important problem in VLSI design. It is always desired that the search should converge quickly to a high quality solution. This paper presents a tabu search based optimization technique to place modules on a regular two-dimensional array. The goal of the technique is to speed up the placement process. The technique is based on a two-step placement strategy. The first step is targeted toward improving circuit routability and the second step addresses circuit performance. The technique is demonstrated through placement of several benchmark circuits on academic as well as commercial FPGAs. Results are compared to placements generated by commercial CAE tools and published simulated annealing based techniques. The tabu search technique compares favorably to published simulated annealing based techniques, and it demonstrates an average execution time speedup of 20 with no impact on quality of results when compared to commercial tools.

scholarly journals Authenticity control of pine sylvestris essential oil by chiral gas chromatographic analysis of α-pinene

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Martina Allenspach ◽  
Claudia Valder ◽  
Daniela Flamm ◽  
Christian Steuer
Keyword(s):  
Gas Chromatography ◽  
Chromatographic Analysis ◽  
Enantiomeric Excess ◽  
Ionization Detector ◽  
Pine Oil ◽  
Flame Ionization ◽  
Enantiomeric Ratio ◽  
Chiral Gas Chromatography

AbstractNumerous terpenes present in essential oils (EOs) display one or more chiral centers. Within the same genus the enantiomeric ratio of these compounds can be different. Thus, the determination of enantiomers is a valuable tool to evaluate authenticity and quality of EOs. In here, the terpene profile of primary and commercial pine EOs was analyzed by conventional and chiral gas chromatography coupled to a flame ionization detector. The enantiomeric excess of ( ±)-α-pinene was determined and significant differences between primary and commercially available EOs were observed. Primary EOs of Pinus sylvestris L. showed a positive enantiomeric excess of (+)-α-pinene whereas commercial EOs labeled as P. sylvestris L. exhibited an enantiomeric excess of (−)-α-pinene. Thus, chiral analysis provides useful information on the authenticity of pine EOs and allows to uncover possible mislabeling, the use of the wrong herbal substance and sources of adulteration in pine oil.

scholarly journals UNIFICATION OF THE CODING SYSTEM TEXTILE PRODUCTS

2021 ◽  
Vol 53 (3) ◽  
pp. 24-29
Author(s):  
Marina A. Lysova ◽  
Lyudmila V. Dryagina ◽  
Natalia A. Gruzintseva ◽  
Boris N. Gusev
Keyword(s):  
Consumer Products ◽  
Two Dimensional ◽  
Coding System ◽  
Industrial Products ◽  
Light Industry ◽  
Functional Capabilities ◽  
Coding Systems ◽  
Textile Products

One of the ways to achieve the required level of quality of industrial products and, consequently, to increase the competitiveness of Russian manufacturers is to implement the task of optimising and unifying the nomenclature of products produced by enterprises. However, at present, due to the differences in the classification and coding systems of consumer products at the corresponding stages of its life cycle, there are problems with the unification of the nomenclature of industrial products, including textiles, since textile and light industry enterprises, trade organisations and customs authorities each use their own classification of these types of products. The paper analyses the functional capabilities of the currently existing coding systems for textile products, and also proposes and implements a method for matrix coding of textile products on the range of geosynthetic materials produced. In addition, the possibility of combining matrix coding of products with information about its manufacturer and quality in the framework of a two-dimensional barcode is shown.

scholarly journals Classification of Two-Dimensional Gas Chromatography Data

2021 ◽  
Author(s):  
Matteo Croci ◽  
Piotr Morawiecki ◽  
Valentin Sulzer ◽  
Florian Theil
Keyword(s):  
Gas Chromatography ◽  
Two Dimensional

scholarly journals Agrobiological and wine quality traits of Vitis vinifera cv. Merlot clones selected in Serbia

OENO One ◽  
2015 ◽  
Vol 49 (4) ◽  
pp. 267
Author(s):  
Dragan S. Vujović ◽  
Dragoljub M. Žunić ◽  
Blaženka S. Popović ◽  
Milica M. Pantelić ◽  
Jelena B. Popović-Djordjević
Keyword(s):  
Clonal Selection ◽  
Research Work ◽  
Market Potential ◽  
Anthocyanin Content ◽  
Wine Quality ◽  
Total Anthocyanin ◽  
Significant Difference ◽  
The Republic ◽  
Selection Of

<p align="justify"><strong>Aims</strong>: The selection of cv. Merlot clones performed in the Grocka winegrowing region, Republic of Serbia, and the study of agrobiological and technological traits of three selected clones and Merlot standard.</p><p style="text-align: justify;"><strong>Methods and results</strong>: The selection of clones was done using the method of individual clone selection in four phases over 15-20 years (Cindrić, 2003). O.I.V. methods were used in determining the most important agrobiological and economic-technological traits of grapes. The results of studied traits of grape and wine suggest that the quality of the clones surpassed the quality of the standard. Although the highest values for most of the studied traits were obtained for clone 025, there was no statistically significant difference between the clones. Indeed, the significant distinction between the clones was obtained for total polyphenol content (TPC) and total anthocyanin content (TAC) in wines: the wine of clone 025 had the highest TPC and TAC values. According to the tasting scores, wines of the clones may be classified as "quality wines with geographical indications".</p><p style="text-align: justify;"><strong>Conclusion</strong>: The selected clones were characterised by good quality grapes and wines. Improved viticultural parameters, versus the mother vine, indicate the need for further research work on the chemistry of both grapes and wines, aiming to better understand the characteristics of the selected clones and their market potential. Significance and impact of the study: The development of new clones (namely 022, 025 and 029) of better quality than the mother vine will, in the long term, lead to the introduction of the best clone(s) in viticultural practices and production. Until today, the clonal selection of Merlot has not been done in the Republic of Serbia and there are no recognised clones.</p>

Research on Diagenetic Facies of Low Permeability Reservoir: A Case Study of the Yanchang Formation in Longdong Area, Ordos Basin

2012 ◽  
Vol 616-618 ◽  
pp. 145-150
Author(s):  
Jing Fu ◽  
Sheng He Wu
Keyword(s):  
Ordos Basin ◽  
Low Permeability ◽  
Yanchang Formation ◽  
Significant Difference ◽  
Local Medium ◽  
Intensity Calculation ◽  
Diagenetic Facies

Based on data of cast thin section, cathode luminescence and scanning electron microscope, the present paper comprehensively investigated the types and quantitative intensity of reservoir diagenesis of the Upper Triassic Yanchang Formation in Longdong area of Ordos Basin, distinguished the types of diagenetic facies from the aspect of quantitative index. The intensity calculation and classification of compaction, cementation and dissolution indicates that the Yanchang Formation of Longdong area experienced strong compaction including medium to strong compaction and extremely strong compaction locally for the high contents of matrix. There is great difference in cementation intensity which presents mainly in weak cementation with local medium to strong cementation. Dissolution is strong in study area mainly in medium to strong. The reservoir could be divided into eight types of diagenetic facies, including medium compaction with strong dissolution face, medium compaction with medium dissolution face, medium compaction with medium cementation and medium dissolution face, strong compaction with strong dissolution face, strong compaction with medium dissolution face, medium compaction with strong cementation face, strong compaction with strong cementation face and extremely strong compaction face. The reservoir quality of different diagenetic facies has a significant difference.

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