Storage of olives (Olea europaea L.) under CO2 atmosphere: liquid chromatography-mass spectrometry characterization of indices related to changes in polyphenolic metabolism     

Dourtoglou VG  Mamalos A  Makris DP  Kefalas P 《Journal of agricultural and food chemistry》2006,54(6):2211-2217

Olives (Olea europaea cv. Chondrolia) were stored under a CO2 atmosphere immediately after harvesting for a period of 12 days. Samples obtained at 24-h intervals were analyzed by HPLC to identify components that may reflect changes in the biochemical behavior of the tissue. Four substances were shown to undergo significant fluctuations during storage, while their evolution was found to be different in olives stored under CO2 from those stored under regular atmospheric conditions (control). On the basis of data provided by liquid chromatography-electrospray ionization mass spectrometry, these substances were tentatively identified as hydroxytyrosol glucoside, demethylated ligstroside aglycone, ibotalactone A methyl ester, and verbascoside. The data are discussed in relation to the effect of postharvest treatments of olives for purposes of manipulating their polyphenolic content and plausible development of novel debittering processes.  相似文献   

Towards sweet cherry (<Emphasis Type="Italic">Prunus avium</Emphasis> L.) breeding: phenotyping evaluation of newly developed hybrids     

Ioannis Ganopoulos  Anna-Maria Farsakoglou  Filippos Aravanopoulos  Athanassios Molassiotis  Michail Michailidis  Ermioni Malliarou  Evangelia Avramidou  Athanasios Tsaftaris  Maslin Osanthanunkul  Panagiotis Madesis  Konstantinos Kazantzis  Aliki Xanthopoulou 《Euphytica》2018,214(6):99

An increasing demand for cherry production (Prunus avium L.) in Greece led to the development of new high quality sweet cherry cultivars. Self-incompatibility in cherry is one of the most challenging issues for the species’ cultivation and top breeding priority. Τhe present study focuses on the development of new hybrids with improved traits such as productivity, fruit size, organoleptic characteristics and self-compatibility. For this purpose, thirty different cultivars were crossed and produced hybrids that were evaluated according to 34 morpho-physiological characteristics. The results were analyzed using the XLSTAT (version 2014.1) software and a dendrogram was constructed using the agglomerative hierarchical clustering method. Optimal hybrid clustering was achieved when characteristics of great economic importance such as fruit shape and size, growth habit and days to blooming were included in the analysis. Based on the results, new sweet cherry hybrids with the special character of self-compatibility were developed. Our findings provide crucial new information for sweet cherry future breeding programs and cultivation.  相似文献   

Description of olive morphological parameters by using open access software     

Konstantinos N. Blazakis  Maria Kosma  George Kostelenos  Luciana Baldoni  Marina Bufacchi  Panagiotis Kalaitzis 《Plant methods》2017,13(1):111

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High‐frequency ultrasound biomicroscopy of the normal canine haired skin     

Panagiotis Mantis  Dimitrios Tontis  David Church  David Lloyd  Kim Stevens  Dimitrios Balomenos  Pagona G. Gouletsou  Giorgos Gianoulopoulos  Dimitrios Doukas  Apostolos D. Galatos  Manolis Saridomichelakis 《Veterinary dermatology》2014,25(3):176-e45

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The revised international autoimmune hepatitis score in chronic liver diseases including autoimmune hepatitis/overlap syndromes and autoimmune hepatitis with concurrent other liver disorders     

Panagiotis A Papamichalis  Kalliopi Zachou  George K Koukoulis  Aikaterini Veloni  Efthimia G Karacosta  Lampros Kypri  Ioannis Mamaloudis  Stella Gabeta  Eirini I Rigopoulou  Ansgar W Lohse  George N Dalekos 《Journal of Autoimmune Diseases》2007,4(1):3

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Volatile compounds of wines produced by cells immobilized on grape skins     

Mallouchos A  Skandamis P  Loukatos P  Komaitis M  Koutinas A  Kanellaki M 《Journal of agricultural and food chemistry》2003,51(10):3060-3066

A biocatalyst was prepared by immobilization of Saccharomyces cerevisiae cells on grape skins. Repeated batch fermentations were conducted using the immobilized biocatalyst as well as the free yeast cells at 25, 20, 15, and 10 degrees C. The major volatile byproducts were determined by GC, whereas the minor volatile constituents were extracted in dichloromethane and analyzed by HRGC-MS. The qualitative profiles of the wines produced were similar in every case. Immobilized cells gave wines with higher contents of ethyl and acetate esters that increased with temperature decreases from 25 to 15 degrees C. The amount of volatile alcohols was more pronounced in wines produced by free cells and decreased dramatically at low fermentation temperatures (10 degrees C).  相似文献   

Evaluation of a portable glucose meter for use in cattle and sheep     

Katsoulos PD  Minas A  Karatzia MA  Pourliotis K  Christodoulopoulos G 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2011,40(2):245-247

Background: In farm animal practice, determination of blood glucose concentration under field conditions is often necessary. Objective: As there is no portable glucose meter device developed for use in farm animals, the analytical accuracy of a portable glucometer designed for people was evaluated for its use in cattle and sheep. Methods: Blood samples from 90 cattle and 101 sheep were used in the study. Glucose concentration was determined in whole blood immediately after blood collection from the jugular vein with the One Touch Vita portable glucometer and in serum with an enzymatic colorimetric method. The agreement between methods was assessed by Passing and Bablok regression analysis. The precision and the accuracy of the measurements were determined using the concordance correlation coefficient. Results: There was a strong linear relationship between the glucose values obtained using the portable glucometer and those obtained by the bench method in both cattle and sheep. Precision was 95% for cattle and 88% for sheep, whereas accuracy was 92% and 99%, respectively. The mean glucose values obtained using the portable glucometer were significantly lower by 8.3% in cattle and 3.2% in sheep than those determined by the bench method. Conclusion: The One Touch Vita portable glucometer can be used in clinical practice to determine blood glucose concentrations in cattle and sheep, but reference intervals (RI) must be corrected to allow for negative bias. Based on these equations the RI for blood glucose in cattle and sheep using the portable glucometer were corrected to 1.84–4.17 and 2.41–4.35 mmol/L, respectively.  相似文献   

Chemical Evaluation of Compost Produced at a Large Greek Mechanical Biological Treatment Plant: Metal Availability and Phytotoxicity     

Konstantina Giannopoulou  Christina Zeri  Panagiotis Nektarios  Aikaterini Sakellari  Eythimia Nydrioti 《Compost science & utilization》2013,21(4):248-266

ABSTRACT

The present work investigates the impact of municipal solid waste mechanical separation and industrial composting on the metal content of composts and assesses the availability of Cu, Cd, Cr, Pb, and Zn at different maturation stages of compost produced at the largest mechanical biological treatment plant in Greece. Substantial metal contamination of composts was found to take place within the industrial facility, attributed to segmentation and sorption mechanisms during composting. In fresh compost, Zn is present in mobile fractions (41%), Cu is mostly held on the less mobile organic phases (57%), Cd is mostly present in bioavailable forms (51%), whereas Pb and Cr are associated with less mobile phases, such as Fe-Mn oxides and organic molecules. Cd, Cu, and Zn migrate to more inert phases during compost maturation, paralleled by the decrease of overall metal leachability. Cu and Pb concentrations (mg kg^?1) exceeded the permissible limits in both composts (Fresh: Cu: 213 ± 48, Pb: 128 ± 69; Mature: Cu: 263 ± 1, Pb: 158 ± 29) and water leachates (Fresh: Cu: 106 ± 4, Zn: 126 ± 13; Mature: Cu: 50 ± 0.50, Zn: 118 ± 20). Nevertheless, toxic effects were not observed in monocot, dicot, or aquatic biosensor plants as indicated by radicle and shoot growth and visual quality ratings. Since metal availability in composts is related to their leaching potential, metal speciation studies should be conducted in leachates for the appropriate characterization of industrial composts.  相似文献   

Mono- and duoculture of juvenile sharpsnout seabream Diplodus puntazzo (Cetti) and gilthead seabream Sparus aurata L. in a recirculated water system     

Nafsika Karakatsouli  Panagiotis Papafotiou  & Sofronios E Papoutsoglou 《Aquaculture Research》2006,37(16):1654-1661

Although the growth of intensively reared sharpsnout seabream Diplodus puntazzo (DP) has been suggested to improve in duoculture with gilthead seabream Sparus aurata (SA), the stocking ratio for most effective duoculture rearing has not been investigated. For this purpose, juvenile D. puntazzo (1.68±0.011 g) and S. aurata (1.43±0.007 g) were reared in duplicated groups of 165 specimens each, in two monoculture (100% DP, 100% SA) and four duoculture combinations (80% DP–20% SA, 60% DP–40% SA, 40% DP–60% SA, 20% DP–80% SA) for 96 days under recirculated water system conditions. Both species exhibited the highest growth when stocked at 20% and the poorest growth when stocked at 80%. For each species, no major differences for coefficient of weight variation and carcass proximate composition were detected. As the percentage of stocked S. aurata increased, D. puntazzo aggressiveness and weight variability of whole population were reduced, while total biomass, food consumption and food conversion ratio were increased. The results obtained are discussed in relation to fish behaviour and social interactions. From the fish farming point of view, it is indicated that under the present experimental conditions, juvenile S. aurata should be reared in monoculture and D. puntazzo in duoculture 40% DP–60% SA.  相似文献   

Insecticide resistance status of Myzus persicae in Greece: long‐term surveys and new diagnostics for resistance mechanisms          下载免费PDF全文

Martin Williamson  Panagiotis J Skouras  Ourania Dimotsiou  Stella Georgiou  Brian Fenton  George Skavdis  John T Margaritopoulos 《Pest management science》2016,72(4):671-683

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