Acceptance of health-promoting Brassica vegetables: the influence of taste perception, information and attitudes     

Cox DN  Melo L  Zabaras D  Delahunty CM 《Public health nutrition》2012,15(8):1474-1482

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Kinetic Model for the Formation of Acrylamide during the Finish-Frying of Commercial French Fries     

JK Parker  DP Balagiannis  J Higley  G Smith  BL Wedzicha  DS Mottram 《Journal of agricultural and food chemistry》2012,60(36):9321-9331

Acrylamide is formed from reducing sugars and asparagine during the preparation of French fries. The commercial preparation of French fries is a multistage process involving the preparation of frozen, par-fried potato strips for distribution to catering outlets, where they are finish-fried. The initial blanching, treatment in glucose solution, and par-frying steps are crucial because they determine the levels of precursors present at the beginning of the finish-frying process. To minimize the quantities of acrylamide in cooked fries, it is important to understand the impact of each stage on the formation of acrylamide. Acrylamide, amino acids, sugars, moisture, fat, and color were monitored at time intervals during the frying of potato strips that had been dipped in various concentrations of glucose and fructose during a typical pretreatment. A mathematical model based on the fundamental chemical reaction pathways of the finish-frying was developed, incorporating moisture and temperature gradients in the fries. This showed the contribution of both glucose and fructose to the generation of acrylamide and accurately predicted the acrylamide content of the final fries.  相似文献   

Preliminary Evaluation of 3D Printed Chitosan/Pectin Constructs for Biomedical Applications     

Georgia Michailidou  Zoe Terzopoulou  Argyroula Kehagia  Anna Michopoulou  Dimitrios N. Bikiaris 《Marine drugs》2021,19(1)

In the present study, chitosan (CS) and pectin (PEC) were utilized for the preparation of 3D printable inks through pneumatic extrusion for biomedical applications. CS is a polysaccharide with beneficial properties; however, its printing behavior is not satisfying, rendering the addition of a thickening agent necessary, i.e., PEC. The influence of PEC in the prepared inks was assessed through rheological measurements, altering the viscosity of the inks to be suitable for 3D printing. 3D printing conditions were optimized and the effect of different drying procedures, along with the presence or absence of a gelating agent on the CS-PEC printed scaffolds were assessed. The mean pore size along with the average filament diameter were measured through SEM micrographs. Interactions among the characteristic groups of the two polymers were evident through FTIR spectra. Swelling and hydrolysis measurements confirmed the influence of gelation and drying procedure on the subsequent behavior of the scaffolds. Ascribed to the beneficial pore size and swelling behavior, fibroblasts were able to survive upon exposure to the ungelated scaffolds.  相似文献   

Autologistic regression and multicriteria evaluation models for the prediction of forest expansion   总被引：1，自引：1，他引：0  

Dimitrios P. Triantakonstantis  Dionissios P. Kalivas  Vassiliki J. Kollias 《New Forests》2013,44(2):163-181

Land use changes are complex ecological processes driven by the interaction of biophysical and human related factors. The prediction of forest land use changes is important for sustainable forest management and biodiversity conservation. This study investigates the modelling process of the spatial dynamics of a forest ecosystem in north eastern Greece. For the prediction of forest expansion, based on land use data of the study area, a deterministic approach using logistic regression and heuristic methods of multi-criteria evaluation is adopted. The set of factors driving forest expansion are: the slope, the distance to roads, the distance to urban areas, the distance to forest, the soil depth, the soil erosion and the influence from the land uses of the neighbourhood. The spatial autocorrelation of driving factors is addressed using an autologistic regression model. The multicriteria evaluation approach is developed using weighted linear combination (WLC) and ordered weighted averaging (OWA) methods. In WLC method the relative importance of each factor was estimated using the analytical hierarchy process. In the OWA method, decision strategies are generated using a selection of relative linguistic quantifiers, which allow different Risk in decisions. The accuracy of the models produced was tested with real data for the year 2001 using the ROC validation method. All the methods produced satisfactory results. Autologistic regression showed slightly better performance than multicriteria evaluation methods due to higher degree of objectivity in defining the importance of driving factors for forest expansion.  相似文献   

A new genomovar of Pseudomonas cichorii, a causal agent of tomato pith necrosis     

Emmanouil A. Trantas  Panagiotis F. Sarris  Evaggelia E. Mpalantinaki  Marianna G. Pentari  Filippos N. Ververidis  Dimitrios E. Goumas 《European journal of plant pathology / European Foundation for Plant Pathology》2013,137(3):477-493

Recent taxonomic advances, based on biochemical and genotypic processes demonstrate that the plant pathogenic species Pseudomonas cichorii consists of a cluster of closely related genomic groups. Prior to this study, three morphotype groups had been described (C1-C3), all sharing various phenotypic and biochemical characters but partially differing in their DNA content. All entities of the complex could cause disease among a variety of hosts, including lettuce, celery, chrysanthemum and others. In this study, we present the biochemical and molecular characterization of P. cichorii isolates as the causal agent of pith necrosis of tomato plants. A detailed characterization of the genetic variability among strains belonging to P. cichorii was achieved using BOX-PCR and Multi Locus Sequence Analysis utilizing three housekeeping genes (gyrB, rpoD, rpoB). In addition, a number of biochemical and physiological tests were also used for the identification of the tomato P. cichorii isolates. To our knowledge, this is the first complete biochemical, molecular and phylogenetic study of P. cichorii strains isolated from tomato plants affected by pith necrosis disease. Our findings demonstrate the emergence of a new genomovar of P. cichorii, yet another indication for the genetic heterogeneity of the species.  相似文献   

Evaluation of chemical and integrated strategies as alternatives to methyl bromide for the control of root-knot nematodes in Greece   总被引：3，自引：0，他引：3  

Giannakou IO  Karpouzas DG 《Pest management science》2003,59(8):883-892

Current environmental awareness has led to a greater demand for alternative nematode control strategies. Three field experiments were established to compare management tactics on cucumber in commercial greenhouses naturally infested with root-knot nematodes (Meloidogyne spp). Cucumber rootstocks which have shown resistance to soil-borne diseases were tested to reveal any resistance/tolerance to root-knot nematodes, and integration of these rootstocks with nematicides was investigated. Metham-sodium and 1,3-dichloropropene (1,3-D) provided good control of nematode populations when their application was followed by the application of a non-fumigant nematicide such as cadusafos or oxamyl. Neither fumigant could provide season-long control of nematode populations, and a further application of cadusafos was required for satisfactory control. The efficacy of metham-sodium was significantly increased when injected into soil in comparison with its application through the drip irrigation system. The use of rootstocks resistant to soil-borne fungal pathogens used together with chemical means of nematode control provided promising results for their further use in integrated strategies as alternatives to methyl bromide. However, the latter was the superior treatment for the control of root-knot nematodes in soil infested with residues of galled roots. Dazomet, metham-sodium nor the non-fumigant nematicides oxamyl and fenamiphos could reduce nematode population as efficiently as methyl bromide. None of the chemicals tested except methyl bromide could enter galled roots and kill surviving nematodes.  相似文献   

Selection and Screening of Endorhizosphere Bacteria from Solarized Soils as Biocontrol Agents Against Verticillium dahliae of Solanaceous Hosts   总被引：4，自引：0，他引：4  

Eleftherios C. Tjamos  Dimitrios I. Tsitsigiannis  Sotirios E. Tjamos  Polymnia P. Antoniou  Panayiotis Katinakis 《European journal of plant pathology / European Foundation for Plant Pathology》2004,110(1):35-44

Verticillium dahliae antagonistic endorhizosphere bacteria were selected from root tips of tomato plants grown in solarized soils. Fifty-three out of the 435 selected bacterial isolates were found to be antagonistic against V. dahliae and several other soilborne pathogens in dual cultures. Significant biocontrol activity against V. dahliae in glasshouse trials was demonstrated in three of 18 evaluated antagonistic isolates, provisionally identified as Bacillus sp. Although fluorescent pseudomonads were also isolated from root tips of tomato plants, none of the tested isolates exercised any significant antagonistic activity against V. dahliae in dual cultures. So these isolates were not tested in glasshouse trials in this study. Finally, two of the most effective bacterial isolates, designated as K-165 and 5-127, were shown to be rhizosphere colonizers, very efficient in inhibiting mycelial growth of V. dahliae in dual cultures and successfully controlling Verticillium wilt of solanaceous hosts. In glasshouse experiments, root dipping or soil drenching of eggplants with bacterial suspension of 10⁷cfu ml^–1 resulted in reduced disease severity expressed as percentage of diseased leaves (40–70%) compared to the untreated controls under high V. dahliae inoculum level (40 microsclerotia g^–1 soil). In heavily Verticillium infested potato fields, experiments with potato seeds dusted with a bacterial talc formulation (10⁸cfu g^–1 formulation), showed a significant reduction in symptom development expressed as percentage of diseased potato plants and a 25% increase in yield over the untreated controls. As for their effectiveness in increasing plant height, both bacterial isolates K-165 and 5-127 produced indolebutyric, indolepyruvic and indole propionic acids. Both antagonists are considered as plant growth promoting rhizobacteria bacteria since significantly increased the height of treated plants compared with the untreated controls. Chitinolytic activity test showed that both isolates were able to produce chitinase. Testing rhizospheric and endophytic activity of the antagonists it was shown that although the bacteria are rhizosphere inhabitants they also preferentially colonize the endorhizosphere of tomatoes and eggplants. Fatty acid analysis showed that isolate K-165 could belong to Paenibacillus alvei while 5-127 to Bacillus amiloliquefaciens.  相似文献   

Thermography measurements and latent heat documentation of Norwegian spruce (Picea abies) exposed to dynamic indoor climate     

Dimitrios Kraniotis  Kristine Nore  Christoph Brückner  Anders Q. Nyrud 《Journal of Wood Science》2016,62(2):203-209

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Genetic variation in farmed populations of the gilthead sea bream Sparus aurata in Greece using microsatellite DNA markers     

Dimitrios Loukovitis  Elena Sarropoulou  Emmanouella Vogiatzi  Costas S. Tsigenopoulos  Georgios Kotoulas  Antonios Magoulas  Dimitrios Chatziplis 《Aquaculture Research》2012,43(2):239-246

Genetic variation in seven reared stocks of gilthead sea bream Sparus aurata, originating from Greek commercial farms, was assessed using five polymorphic microsatellite markers and was compared with that of two natural populations from the Ionian and the Adriatic Seas. The total number of alleles per marker ranged from 11 to 19 alleles, and hatchery samples showed the same levels of observed heterozygosity with samples from the wild but substantially smaller allelic diversity and expected heterozygosity. The global genetic differentiation for the cultivated samples was significant as indicated by F_st analysis, which might indicate random genetic drift and inbreeding events operating in the hatcheries. On the contrary, no significant difference was found between the two wild populations. Population pairwise tests between farmed and wild stocks were also significant, with the exception of one hatchery sample, the Central Greece 1, which was not significantly different from the two wild samples perhaps due to its recent use in aquaculture from wild‐caught animals. The UPGMA tree topology grouped the wild samples together with the Central Greece 1 stock, and showed a clear division between wild and farmed sample sets for the six remaining hatchery samples. Knowledge of the genetic variation in S. aurata cultured populations compared with that in the wild ones is essential for setting up appropriate guidelines for the proper monitoring and management of the stocks either under traditional practices or for the implementation of selective breeding programmes.  相似文献   

Assessment of the impact of the fumigant dimethyl disulfide on the dynamics of major fungal plant pathogens in greenhouse soils     

C. Papazlatani  C. Rousidou  A. Katsoula  M. Kolyvas  S. Genitsaris  K. K. Papadopoulou  Dimitrios G. Karpouzas 《European journal of plant pathology / European Foundation for Plant Pathology》2016,146(2):391-400

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