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  1. Book ; Online: UZH_CLyp at SemEval-2023 Task 9

    Michail, Andrianos / Konstantinou, Stefanos / Clematide, Simon

    Head-First Fine-Tuning and ChatGPT Data Generation for Cross-Lingual Learning in Tweet Intimacy Prediction

    2023  

    Abstract: This paper describes the submission of UZH_CLyp for the SemEval 2023 Task 9 "Multilingual Tweet Intimacy Analysis". We achieved second-best results in all 10 languages according to the official Pearson's correlation regression evaluation measure. Our ... ...

    Abstract This paper describes the submission of UZH_CLyp for the SemEval 2023 Task 9 "Multilingual Tweet Intimacy Analysis". We achieved second-best results in all 10 languages according to the official Pearson's correlation regression evaluation measure. Our cross-lingual transfer learning approach explores the benefits of using a Head-First Fine-Tuning method (HeFiT) that first updates only the regression head parameters and then also updates the pre-trained transformer encoder parameters at a reduced learning rate. Additionally, we study the impact of using a small set of automatically generated examples (in our case, from ChatGPT) for low-resource settings where no human-labeled data is available. Our study shows that HeFiT stabilizes training and consistently improves results for pre-trained models that lack domain adaptation to tweets. Our study also shows a noticeable performance increase in cross-lingual learning when synthetic data is used, confirming the usefulness of current text generation systems to improve zero-shot baseline results. Finally, we examine how possible inconsistencies in the annotated data contribute to cross-lingual interference issues.

    Comment: Accepted at SemEval-2023
    Keywords Computer Science - Computation and Language ; Computer Science - Artificial Intelligence ; 68T50
    Subject code 004 ; 006
    Publishing date 2023-03-02
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article: Postharvest Fruit Rots of Apple in Greece: Pathogen Incidence and Relationships Between Fruit Quality Parameters, Cultivar Susceptibility, and Patulin Production.

    Konstantinou, S / Karaoglanidis, G S / Bardas, G A / Minas, I S / Doukas, E / Markoglou, A N

    Plant disease

    2019  Volume 95, Issue 6, Page(s) 666–672

    Abstract: The incidence of pathogens associated with postharvest fruit rots on the four most extensively cultivated apple cultivars (Red Delicious, Golden Delicious, Granny Smith, and Fuji) in Greece was surveyed during two consecutive storage periods (2008-09 and ...

    Abstract The incidence of pathogens associated with postharvest fruit rots on the four most extensively cultivated apple cultivars (Red Delicious, Golden Delicious, Granny Smith, and Fuji) in Greece was surveyed during two consecutive storage periods (2008-09 and 2009-10) in five packinghouses located in northern Greece. The fungi isolated were identified based on their morphological characteristics and internal transcribed spacer gene sequencing. In the four cultivars sampled, Penicillium expansum and Botrytis cinerea were the predominant pathogens, accounting for averages of 44.2 and 23.6%, respectively, of the pathogens isolated from the sampled fruit. Two other important rot pathogens were Alternaria tenuissima and Mucor pyriformis, accounting for 16.1 and 6.6%, respectively, of the diseased apple fruit. Other pathogens such as Monilinia laxa, M. fructigena, Botryosphaeria obtusa, Geotrichum candidum, Fusarium avenaceum, and F. proliferatum were isolated at low frequencies and are considered of minor importance. Measurements of the resistance level of the four apple cultivars to fruit rot caused by P. expansum and Botrytis cinerea revealed that Golden Delicious was the most susceptible to blue mold while Fuji was the most susceptible to gray mold infections. Susceptibility to gray mold was negatively correlated with flavonoid and phenol concentration as well to fruit antioxidant activity, while susceptibility to blue mold was negatively correlated with fruit firmness and phenol concentration. Patulin production was significantly higher in Red Delicious and Golden Delicious fruit than in Granny Smith and Fuji fruit and was negatively correlated with the acidity of the fruit. The high incidence of P. expansum and A. tenuissima along with the presence of F. avenaceum and F. proliferatum, all of which are potentially mycotoxin producers, emphasize the risk for mycotoxin contamination of apple fruit juices and by-products. Furthermore, information on the distribution of the pathogens on the main cultivars may be useful for the implementation of strategies to control the diseases and minimize the threat of mycotoxin contamination on each cultivar.
    Language English
    Publishing date 2019-02-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 754182-x
    ISSN 0191-2917
    ISSN 0191-2917
    DOI 10.1094/PDIS-11-10-0856
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: A report of the main aspects and problems of the Greek National Health System.

    Konstantinou, S

    Acta hospitalia

    1991  Volume Spec No, Page(s) 65–68

    MeSH term(s) Greece ; Health Priorities ; Health Services Needs and Demand/trends ; Hospital Administration/trends ; Hospitals, Public/legislation & jurisprudence ; Medical Staff, Hospital/supply & distribution ; Primary Health Care/trends ; Social Problems ; State Medicine/legislation & jurisprudence
    Language English
    Publishing date 1991
    Publishing country Belgium
    Document type Journal Article
    ZDB-ID 604689-7
    ISSN 0044-6009
    ISSN 0044-6009
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Instantaneous responses of microbial communities to stress in soils pretreated with Mentha spicata essential oil and/or inoculated with arbuscular mycorrhizal fungus

    Konstantinou, Sotiris / Monokrousos, Nikos / Kapagianni, Pantelitsa / Menkissoglu‐Spiroudi, Urania / Gwynn‐Jones, Dylan / Stamou, George P. / Papatheodorou, Efimia M.

    Ecological research. 2019 Nov., v. 34, no. 6

    2019  

    Abstract: The instantaneous response of a soil microbial community to a chemical stressor (Mentha spicata essential oil) was studied post acclimation to the same chemical treatment at lower exposure. Acclimation involved the repeated addition of small amounts of ... ...

    Abstract The instantaneous response of a soil microbial community to a chemical stressor (Mentha spicata essential oil) was studied post acclimation to the same chemical treatment at lower exposure. Acclimation involved the repeated addition of small amounts of the essential oil weekly for a period of 1 month, while for the stress treatment, a 10‐fold exposure level was introduced. We also tested the role of arbuscular mycorrhizal fungus (AMF) in the reponse of microbial community to the same stress exposure by pre‐inoculating plant roots in the soil with the AMF Rhizophagus irregularis. Three days after stress exposure, the structure of the soil microbial community was investigated in addition to the activities of six soil enzymes mainly related to the N‐cycle. The two preselected AMF inoculation and acclimation soil microbial communities responded differently to the subsequent stress. Acclimation enhanced the biomass of G⁺ bacteria, fungi and microeukaryotes, showing a priming effect of a low‐intensity stimulus when applied repeatedly, while AMF inoculation decreased the biomass of these microbial groups. The relative changes in microbial biomasses in jointly pretreated samples were not different from the control, suggesting opposing effects of the two pretreatments. On the contrary, the jointly pretreated samples responded to stress exposure by exhibiting increased activity of asparaginase and glutaminase and reduced activity of arylamidase. Finally, the relationship between enzyme activities and certain microbial ratios denotes that specific activities depended on the relative abundance of specific functional groups (e.g., G⁺ or G⁻) rather than on their biomass per se.
    Keywords Mentha spicata ; Rhizophagus irregularis ; acclimation ; asparaginase ; biomass ; chemical treatment ; essential oils ; glutaminase ; microbial communities ; mycorrhizal fungi ; nitrogen cycle ; research ; soil
    Language English
    Dates of publication 2019-11
    Size p. 701-710.
    Publishing place John Wiley & Sons, Inc.
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 233459-8
    ISSN 1440-1703 ; 0912-3814
    ISSN (online) 1440-1703
    ISSN 0912-3814
    DOI 10.1111/1440-1703.12030
    Database NAL-Catalogue (AGRICOLA)

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  5. Article: Postharvest Fruit Rots of Apple in Greece: Pathogen Incidence and Relationships Between Fruit Quality Parameters, Cultivar Susceptibility, and Patulin Production

    Konstantinou, S / Karaoglanidis, G.S / Bardas, G.A / Minas, I.S / Doukas, E / Markoglou, A.N

    Plant disease. 2011 June, v. 95, no. 6

    2011  

    Abstract: The incidence of pathogens associated with postharvest fruit rots on the four most extensively cultivated apple cultivars (Red Delicious, Golden Delicious, Granny Smith, and Fuji) in Greece was surveyed during two consecutive storage periods (2008-09 and ...

    Abstract The incidence of pathogens associated with postharvest fruit rots on the four most extensively cultivated apple cultivars (Red Delicious, Golden Delicious, Granny Smith, and Fuji) in Greece was surveyed during two consecutive storage periods (2008-09 and 2009-10) in five packinghouses located in northern Greece. The fungi isolated were identified based on their morphological characteristics and internal transcribed spacer gene sequencing. In the four cultivars sampled, Penicillium expansum and Botrytis cinerea were the predominant pathogens, accounting for averages of 44.2 and 23.6%, respectively, of the pathogens isolated from the sampled fruit. Two other important rot pathogens were Alternaria tenuissima and Mucor pyriformis, accounting for 16.1 and 6.6%, respectively, of the diseased apple fruit. Other pathogens such as Monilinia laxa, M. fructigena, Botryosphaeria obtusa, Geotrichum candidum, Fusarium avenaceum, and F. proliferatum were isolated at low frequencies and are considered of minor importance. Measurements of the resistance level of the four apple cultivars to fruit rot caused by P. expansum and Botrytis cinerea revealed that Golden Delicious was the most susceptible to blue mold while Fuji was the most susceptible to gray mold infections. Susceptibility to gray mold was negatively correlated with flavonoid and phenol concentration as well to fruit antioxidant activity, while susceptibility to blue mold was negatively correlated with fruit firmness and phenol concentration. Patulin production was significantly higher in Red Delicious and Golden Delicious fruit than in Granny Smith and Fuji fruit and was negatively correlated with the acidity of the fruit. The high incidence of P. expansum and A. tenuissima along with the presence of F. avenaceum and F. proliferatum, all of which are potentially mycotoxin producers, emphasize the risk for mycotoxin contamination of apple fruit juices and by-products. Furthermore, information on the distribution of the pathogens on the main cultivars may be useful for the implementation of strategies to control the diseases and minimize the threat of mycotoxin contamination on each cultivar.
    Keywords Alternaria tenuissima ; Botryosphaeria obtusa ; Botrytis cinerea ; Fusarium avenaceum ; Geotrichum candidum ; Malus domestica ; Monilinia laxa ; Mucor ; Penicillium expansum ; acidity ; antioxidant activity ; apples ; byproducts ; correlation ; cultivars ; disease control ; firmness ; flavonoids ; fruit juices ; fruit quality ; fungi ; genes ; gray mold ; internal transcribed spacers ; packing houses ; pathogens ; patulin ; phenol ; plant rots ; risk ; storage time ; Greece
    Language English
    Size p. 666-672.
    Publishing place American Phytopathological Society
    Document type Article
    ZDB-ID 754182-x
    ISSN 0191-2917
    ISSN 0191-2917
    DOI 10.1094/PDIS-11-10-0856
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Identification, characterization and mycotoxigenic ability of Alternaria spp. causing core rot of apple fruit in Greece.

    Ntasiou, Panagiota / Myresiotis, Charalampos / Konstantinou, Sotiris / Papadopoulou-Mourkidou, Euphemia / Karaoglanidis, George S

    International journal of food microbiology

    2015  Volume 197, Page(s) 22–29

    Abstract: Alternaria core rot is a major postharvest disease of apple fruit in several countries of the world, including Greece. The study was conducted aiming to identify the disease causal agents at species level, investigate the aggressiveness of Alternaria spp. ...

    Abstract Alternaria core rot is a major postharvest disease of apple fruit in several countries of the world, including Greece. The study was conducted aiming to identify the disease causal agents at species level, investigate the aggressiveness of Alternaria spp. isolates and the susceptibility of different apple varieties and determine the mycotoxigenic potential of Alternaria spp. isolates from apple fruit. Seventy-five Alternaria spp. isolates obtained from apple fruit showing core rot symptoms were identified as either Alternaria tenuissima or Alternaria arborescens at frequencies of 89.3 and 11.7%, respectively, based on the sequence of endopolygalacturonase (EndoPG) gene. Artificial inoculations of fruit of 4 different varieties (Fuji, Golden Delicious, Granny Smith and Red Delicious) and incubation at two different temperatures (2 and 25°C) showed that fruit of Fuji variety were the most susceptible and fruit of Golden Delicious the most resistant to both pathogens. In addition, the production of 3 mycotoxins, alternariol (AOH), alternariol monomethyl ether (AME) and tentoxin (TEN) was investigated in 30 isolates of both species. Mycotoxin determination was conducted both in vitro, on artificial nutrient medium and in vivo on artificially inoculated apple fruit, using a high performance liquid chromatography with diode array detector (HPLC-DAD). The results showed that most of the isolates of both species were able to produce all the 3 metabolites both in vivo and in vitro. On apple fruit A. tenuissima isolates produced more AOH than A. arborescens isolates, whereas the latter produced more TEN than the former. Such results indicate that Alternaria core rot represents a major threat of apple fruit production not only due to quantitative yield losses but also for qualitative deterioration of apple by-products.
    MeSH term(s) Alternaria/chemistry ; Alternaria/physiology ; Chromatography, High Pressure Liquid ; Fruit/microbiology ; Greece ; Lactones/analysis ; Lactones/metabolism ; Malus/microbiology ; Mycotoxins/analysis ; Mycotoxins/metabolism ; Peptides, Cyclic/analysis ; Peptides, Cyclic/metabolism
    Chemical Substances Lactones ; Mycotoxins ; Peptides, Cyclic ; tentoxin (FW4EQ02E0Z) ; alternariol (KN9L4260JW) ; alternariol monomethyl ether (Y79STA800H)
    Language English
    Publishing date 2015-03-16
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 87122-9
    ISSN 1879-3460 ; 0168-1605
    ISSN (online) 1879-3460
    ISSN 0168-1605
    DOI 10.1016/j.ijfoodmicro.2014.12.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Population Structure, Fungicide Resistance Profile, and sdhB Mutation Frequency of Botrytis cinerea from Strawberry and Greenhouse-Grown Tomato in Greece.

    Konstantinou, Sotirios / Veloukas, Thomas / Leroch, Michaela / Menexes, George / Hahn, Matthias / Karaoglanidis, George

    Plant disease

    2015  Volume 99, Issue 2, Page(s) 240–248

    Abstract: Botrytis cinerea is a pathogen with high genetic variability that has also shown high risk for fungicide resistance development. In total, 1,169 isolates obtained from strawberry (n = 297) and tomato (n = 872) in five geographic regions of Greece were ... ...

    Abstract Botrytis cinerea is a pathogen with high genetic variability that has also shown high risk for fungicide resistance development. In total, 1,169 isolates obtained from strawberry (n = 297) and tomato (n = 872) in five geographic regions of Greece were tested for their sensitivity to several botryticides. A high frequency of isolates with multiple resistance to carbendazim, cyprodinil, pyraclostrobin, and boscalid was found in isolates from strawberry. In the isolates from tomato, the predominant phenotype was that of dual resistance to carbendazim and cyprodinil in the Crete island, of single resistance to carbendazim in the region of Preveza, and of sensitive isolates in the region of Kyparissia. None of the tested isolates was found to be fludioxonil resistant. High frequencies of boscalid-resistant phenotypes were observed in the strawberry isolates, while boscalid-resistance frequency in the tomato isolates was lower. H272R was the predominant sdhB mutation, associated with resistance to boscalid, in all the sampled isolates, while other sdhB mutations were found at low frequencies. B. cinerea group S, identified by the presence of a 21-bp insertion in the transcription factor mrr1 gene, was predominant within the tomato isolates obtained from all three sampled regions, with frequencies ranging from 62 to 75% of the isolates; whereas, within strawberry isolates, B. cinerea was predominant, with frequencies of 75 to 95%. Correlations of isolate genotype and fungicide resistance profile showed that B. cinerea sensu stricto isolates were more prone to the development of resistance to boscalid compared with the Botrytis group S isolates, which may explain the observed predominance of B. cinerea sensu stricto in strawberry fields.
    Language English
    Publishing date 2015-06-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 754182-x
    ISSN 0191-2917
    ISSN 0191-2917
    DOI 10.1094/PDIS-04-14-0373-RE
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Apostolos Kalivas, and Panagiotis Madesis Fast and Accurate Screening of Solanum melongena with High-Resolution Melting Analysis for Resistance to Fusarium Wilt

    Ganopoulos, Ioannis / Xanthopoulou, Aliki / Konstantinou, Sotiris / Karaoglanidis, George S. / Tsaliki, Eleni

    International journal of vegetable science

    2016  Volume 22, Issue 1/6, Page(s) 183

    Language English
    Document type Article
    ZDB-ID 2390923-7
    ISSN 1931-5260 ; 1049-6467 ; 1548-1689
    Database Current Contents Nutrition, Environment, Agriculture

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  9. Article ; Online: Molecular characterization, fitness and mycotoxin production of benzimidazole-resistant isolates of Penicillium expansum.

    Malandrakis, Anastasios A / Markoglou, Anastasios N / Konstantinou, Sotiris / Doukas, Eleftherios G / Kalampokis, John F / Karaoglanidis, George S

    International journal of food microbiology

    2013  Volume 162, Issue 3, Page(s) 237–244

    Abstract: Penicillium expansum field-strains resistant to benzimidazole fungicides were isolated in high frequency from decayed apple fruit collected from packinghouses and processing industries located in the region of Imathia, N. Greece. In vitro fungitoxicity ... ...

    Abstract Penicillium expansum field-strains resistant to benzimidazole fungicides were isolated in high frequency from decayed apple fruit collected from packinghouses and processing industries located in the region of Imathia, N. Greece. In vitro fungitoxicity tests resulted in the identification of two different resistant phenotypes: highly (BEN-HR) and moderately (BEN-MR) carbendazim-resistant. Thirty seven percent of the isolated P. expansum strains belonged to the BEN-HR phenotype, carried no apparent fitness penalties and exhibited resistance levels higher than 60 based on EC50 values. Cross resistance studies with other benzimidazole fungicides showed that all BEN-HR and BEN-MR isolates were also less sensitive to benomyl and thiabendazole. Fungitoxicity tests on the response of BEN-HR isolates to fungicides belonging to other chemical classes revealed no cross-resistance relationships between benzimidazoles and the phenylpyrrole fludioxonil, the dicarboximide iprodione, the anilinopyrimidine cyprodinil, the QoI pyraclostrobin, the imidazole imazalil and the triazole tebuconazole, indicating that a target-site modification is probably responsible for the BEN-HR phenotype observed. Contrary to the above, some BEN-MR isolates exhibited an increased sensitivity to cyprodinil compared to benzimidazole-sensitive ones. BEN-MR isolates had fitness parameters similar to the benzimidazole-sensitive isolates except for conidia production which appeared significantly decreased. Analysis of mycotoxin production (patulin and citrinin) showed that all benzimidazole-resistant isolates produced mycotoxins at concentrations significantly higher than sensitive isolates both on culture medium and on artificially inoculated apple fruit. Comparison of the β-tubulin gene DNA sequence between resistant and sensitive isolates revealed a point mutation resulting from the E198A substitution of the corresponding protein in most but not all HR isolates tested. Molecular analysis of the β-tubulin gene in moderately resistant isolates did not reveal any amino acid substitution. This is the first report on the existence and distribution of highly mycotoxigenic field isolates of P. expansum resistant to the benzimidazoles indicating a high potential risk of increased mycotoxin contamination of pome fruit and by-products.
    MeSH term(s) Aminoimidazole Carboxamide/analogs & derivatives ; Benzimidazoles/toxicity ; Carbamates ; Dioxoles/toxicity ; Drug Resistance, Multiple, Fungal/genetics ; Fruit/microbiology ; Fungicides, Industrial/toxicity ; Hydantoins ; Malus/microbiology ; Mycotoxins/biosynthesis ; Patulin/toxicity ; Penicillium/genetics ; Penicillium/metabolism ; Pyrazoles ; Pyrimidines ; Pyrroles/toxicity ; Strobilurins ; Thiabendazole/toxicity ; Triazoles/toxicity ; Tubulin/genetics
    Chemical Substances Benzimidazoles ; Carbamates ; Dioxoles ; Fungicides, Industrial ; Hydantoins ; Mycotoxins ; Pyrazoles ; Pyrimidines ; Pyrroles ; Strobilurins ; Triazoles ; Tubulin ; Aminoimidazole Carboxamide (360-97-4) ; tebuconazole (401ATW8TRW) ; cyprodinil (42P6T6OFWZ) ; Patulin (95X2BV4W8R) ; pyrachlostrobin (DJW8M9OX1H) ; benzimidazole (E24GX49LD8) ; fludioxonil (ENS9J0YM16) ; Thiabendazole (N1Q45E87DT) ; iprodione (S3AYV2A6EU)
    Language English
    Publishing date 2013-04-01
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 87122-9
    ISSN 1879-3460 ; 0168-1605
    ISSN (online) 1879-3460
    ISSN 0168-1605
    DOI 10.1016/j.ijfoodmicro.2013.01.014
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Sensitivity of Penicillium expansum field isolates to tebuconazole, iprodione, fludioxonil and cyprodinil and characterization of fitness parameters and patulin production

    Karaoglanidis, G. S. / Markoglou, A. N. / Bardas, G. A. / Doukas, E. G. / Konstantinou, S. / Kalampokis, J. F.

    International journal of food microbiology

    2011  Volume 145, Issue 1, Page(s) 195

    Language English
    Document type Article
    ZDB-ID 87122-9
    ISSN 0168-1605
    Database Current Contents Nutrition, Environment, Agriculture

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