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D.?LykouressisEmail author D.?Perdikis C.?Michalis A.?Fantinou 《Journal of pest science》2004,77(4):205-210
The effects of mating disruption on population densities and percentage of damage of the pink bollworm Pectinophora gossypiella (Saunders) were investigated in a cotton field in central Greece, in 1992 and 1993. A 10-ha field was divided in two parts of 5 ha each. PB-rope dispensers were installed in mid-season in one part, whereas the other was used as a control field. Catches of pink bollworm moths in pheromone-baited traps and damage caused were recorded in both the treated and control fields. Results showed that moth catches were highly reduced in the treated field and, therefore, mid-season installation of dispensers was successful. Damage (%) was significantly less in the treated compared with the control field. Consequently, the field size of 5 ha seems to be adequate for the effective implementation of mating disruption. 相似文献
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Ioannis K. Kalavrouziotis Eirini Kostakioti Prodromos H. Koukoulakis Aristotelis H. Papadopoulos Michalis Leotsinidis Eleni Sakazli 《Water, air, and soil pollution》2011,214(1-4):565-573
Two greenhouse pot experiments were conducted in Agrinion, Greece, using a randomized block design in four replications, respectively, as follows: The first one included five levels of treated municipal wastewater (TMWW), being used as an irrigation water source. The second one, five levels of applied Cl at a constant soil applied Cd level of 10.36?mg/kg soil, the plants being irrigated with fresh well water. The purpose of these experiments was to study the impact of the Cl ?? Cd interrelationship on planning TMWW reuse, for the irrigation of Brassica oleracea var. Capitata (cabbage) cv F1 Gloria, ehich was used as test plant, in both of these experiments. It was found that the TMWW Cl content, originating mainly from the procedure of wastewater chlorination, was synergistically interrelated with the toxic heavy metal Cd, increasing its soil availability and cabbage plant leaf uptake (edible plant part). As this increase is directly associated with the consumer??s health, it was suggested that the TMWW be subjected to dechlorination process or the disinfection be made by ozonation or UV, which do not include Cl. 相似文献
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Vassos Vassiliou Marios Charalambides Michalis Menicou Niki Chartosia Eftihia Tzen Binopoulos Evagelos 《Aquaculture Economics & Management (Blackwell Science)》2013,17(4):423-443
Fish feed accounts for more than 50% of aquaculture farms’ operating costs and thus careful feeding planning is vital. In the case of the Mediterranean, most farms have their installations in coastal waters, hence this is relatively easy to perform. Low magnitude environmental conditions (winds, waves and currents) as well as easy and quick access ensures high consumption rates and smooth operation. Nevertheless, as competition for these waters increases the option of moving to offshore waters is seen as a solution. Moving further away from shore means exposing installations to harsher environments and lower degree of onshore monitoring. As a result, environmental conditions must now be monitored on-site, especially the ones affecting operations and feeding planning. For this reason, this article presents a feed management system powered by a stand-alone renewable energy sources system. The system provides energy independence and mobility by wirelessly transmitting important parameters onshore. An investment appraisal cost model is also described. The model compares the system’s costs over the fish feed cost saved by a priori feeding planning through better monitoring of on-site conditions. It concludes that such synergies have profitable potentials. 相似文献
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N Kitsati D Fokas MD Ouzouni MD Mantzaris A Barbouti D Galaris 《Journal of agricultural and food chemistry》2012,60(32):7873-7879
Naturally occurring cinnamic acid derivatives are ubiquitously distributed in the plant kingdom, and it has been proposed that their consumption contributes to the maintenance of human health. However, the molecular mechanisms underlying their health keeping effects remain unknown. In the present investigation, we evaluated the capacity of several cinnamic acid derivatives (trans-cinnamic, p-coumaric, caffeic and ferulic acids, as well as caffeic acid-methyl and -propyl esters) to protect cells from oxidative stress-induced DNA damage. It was observed that effective protection was based on the ability of each compound to (i) reach the intracellular space and (ii) chelate intracellular "labile" iron. These results support the notion that numerous lipophilic iron chelating compounds, present abundantly in plant-derived diet components, may protect cells in conditions of oxidative stress and in this way be important contributors toward maintenance of human health. 相似文献
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Alexopoulos Athanasios Leotsinidis Michalis Schinas Vassilios Kondakis Xenofon Gerasimos 《Water, air, and soil pollution》1999,114(1-2):67-83
The mutagenic activity of thirty drinking water samples from 30 small communities in the districts of Achaia and Elia located in SW Greece as well as seven samples from the city of Patras (in the same area with 153 000 inhabitants) were examined during the years 1994–1995. The organic extract from 300–400 L of water was collected from each station and was subjected to the Ames mutagenicity assay using four genetically mutated strains of Salmonella typhimurium (TA97a, TA98, TA100, TA102) with or without metabolic acivation (10% S9). At the same time, several physicochemical characteristics of the samples were measured. Criteria for the mutagenic activity of the water samples were based on the two-fold rule and the significant non-zero slope of the linear dose response curve. In 84% of the samples at least one assay fulfilled both the two-fold rule and the significant slope and could be considered mutagenic. Thirty nine per cent (39%) of the samples were considered to show a strong mutagenic response, as in these samples the simultaneous satisfaction of the two criteria was observed in at least 3 assays out of eight. The mutagenic response was shown to be higher in chlorinated compared to untreated water samples. In the city of Patras, drinking water showed an increased mutagenic potential in comparison to an earlier study, regardless of the disinfecting process (chlorine or chlorine dioxide). The authors discuss the possibility that mutagenic activity was dependent on interaction among various organic compounds, metals and other water constituents. 相似文献
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Michalis Pavlidis Maria Karkana Eleftheria Fanouraki & Nikos Papandroulakis 《Aquaculture Research》2008,39(8):837-849
Fish display sophisticated skin chromatic properties that are of considerable ecological, physiological and behavioural importance. The aim of study was to investigate the role of important physical parameters (background colour, lighting spectrum, light intensity and water temperature) on skin colour to gain better knowledge of the environmental factors that regulate pigmentation in cultured red porgy, Pagrus pagrus . All tested physical parameters had a significant effect on skin lightness, especially in the dorsal body area; low light intensity, blue spectrum, a water temperature of 19 °C and a white background significantly increased skin lightness. This effect was mediated through changes in melanophore motility and/or skin melanin concentration. None of the examined factors affected skin hue while a significant decrease in skin entire colour index (a combination of hue and chroma) was found only in white background-adapted fish. It is concluded that all tested physical factors are important regulators of skin lightness. 相似文献
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Vertebrate segmentation relies on a mechanism characterized by oscillating gene expression. Whether this mechanism is used by other segmented animals has been controversial. Rigorous proof of cyclic expression during arthropod segmentation has been lacking. We find that the segmentation gene odd-skipped (Tc-odd) oscillates with a two-segment periodicity in the beetle Tribolium castaneum. By bisecting embryos and culturing the two halves over different time intervals, we demonstrate that Tc-odd cycles with a period of about 95 minutes at 30°C. Using live imaging and cell tracking in green fluorescent protein-expressing embryos, we can exclude that cell movements explain this dynamic expression. Our results show that molecular oscillators represent a common feature of segmentation in divergent animals and help reconcile the contrasting paradigms of insect and vertebrate segmentation. 相似文献
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Michalis K Stefanakis Elias Anastasopoulos Haralambos E Katerinopoulos Pavlos Makridis 《Aquaculture Research》2014,45(11):1861-1866
Essential oils extracted from three plant species of the genus Origanum, Origanum vulgare subsp. hirtum, Origanum onites L. and Origanum marjorana L., were assayed as potential antibacterial agents for disinfection of rotifers Brachionus plicatilis. Survival of rotifers in seawater with added oregano essential oils was significantly higher than in the control treatment (P < 0.05). When rotifers were incubated in seawater with added oregano essential oils at a final concentration of 10 mg L?1 for 4 h, the numbers of total culturable bacteria were not significantly lower than in the control treatment (P > 0.05), while the numbers of presumptive Vibrio in rotifers were significantly reduced compared with the control treatment (P < 0.05). 相似文献