Preliminary results on detection of maize treated with electrons for seed dressing and according decontamination and infestation     

Mihalis Cutrubinis  Henry Delincée  Mario Stahl  Olaf R?der  Hans Jürgen Schaller 《Gesunde Pflanzen》2005,224(4):129-136

Saatgut und Getreide kann mit niederenergetischen Elektronen (<300 kev) oder=" hochenergetischen=" elektronen=" (1–10 mev)=" wirksam=" behandelt=" werden,=" um=" mikroorganismen=" und=" insekten=" abzutöten.=" in=" dieser=" vorläufigen=" studie=" wurde=" mais=" mit=" niederenergetischen=" (125 kev)=" und=" hochenergetischen=" elektronen=" (10 mev)=" behandelt.=" um=" diese=" elektronenbehandlung=" nachzuweisen,=" wurden=" verschiedene=" verfahren=" eingesetzt:=" photostimulierte=" lumineszenz=" (psl),=" thermolumineszenz=" (tl)=" und=" dna-kometentest.=" für=" diese=" drei=" nachweismethoden=" existieren=" bereits=" europäische=" normen=" und=" sie=" sind=" als=">Allgemeine Codex Methoden zum Nachweis bestrahlter Lebensmittel etabliert. Die Ergebnisse zeigen, dass PSL und TL geeignete Verfahren sind, um sowohl eine Behandlung von Mais mit niederenergetischen als auch mit hochenergetischen Elektronen zu erkennen. Der DNA-Kometentest erwies sich als weniger geeignet: die Behandlung mit niederenergetischen Elektronen konnte—wie erwartet—nicht nachgewiesen werden. Die Behandlung mit hochenergetischen Elektronen konnte bei einer Maissorte erkannt werden, jedoch nicht bei einer anderen Sorte.  相似文献   

Dynamics of Atmospheric Aerosol Number Size Distributions in the Eastern Mediterranean During the ��SUB-AERO�� Project     

Vladimir ?d��mal  Jiri Smol��k  Kostas Eleftheriadis  Zdenek Wagner  Christos Housiadas  Nikos Mihalopoulos  Pavel Miku?ka  Zbynek Ve?e?a  Ilias Kopanakis  Mihalis Lazaridis 《Water, air, and soil pollution》2011,214(1-4):133-146

Measurements of number size distributions of submicron aerosols have been performed at the Eastern part of Mediterranean as part of an extensive measurement campaign to study photo-oxidants and aerosols (SUB-AERO Project). The measurements were made at the Finokalia station on the island of Crete (Greece) and onboard the research vessel ??Aegaeon??. Two campaigns were performed during July 2000 and January 2001 using two scanning mobility particle sizers. The particle distributions measured in the range between 7.8 < d _p < 327 nm during the summer measurements and between 7.5 < d _p < 316 nm during the winter measurements, where d _p is the mobility particle diameter. The concentration of ultrafine particles (7.5 < d _p < 30 nm) was higher during the winter period and varied mainly between 5 × 10¹ and 2 × 10³?cm^?3 with concentration peak values for this mode exceeding 1 × 10⁴?cm^?3. During the summer campaign, an average number concentration of 1 × 10²?cm^?3 at Finokalia and about 5 × 10¹?cm^?3 aboard the ??Aegaeon?? vessel was measured. An average concentration of 1 × 10³?cm^?3 was measured for the particles in the size range between 30 and 100 nm, whereas in the size range 100?C300 nm, the measured concentration ranged between 1 × 10² and 5 × 10³?cm^?3. Diurnal patterns in number concentrations were observed in connection with the transport of air masses and local sources. During the winter period, three nucleation events were observed in connection with the appearance of a particle mode at 20 nm.  相似文献   

The effect of different carotenoid sources on skin coloration of cultured red porgy (Pagrus pagrus)   总被引：4，自引：0，他引：4  

Stavros Chatzifotis  Mihalis Pavlidis  Carmen Doñate Jimeno  George Vardanis  Aspasia Sterioti  & Pascal Divanach 《Aquaculture Research》2005,36(15):1517-1525

This study presents data on the effect of carotenoid sources on skin coloration of red porgy (Pagrus pagrus). Three experiments were conducted: in the first, fish were fed an astaxanthin (Naturose^®)‐supplemented diet, while the second fish received diets supplemented with β‐carotene (Rovimix β‐caroten^®) or lycopene (Lyc‐O‐Mato^®): Carotenoids were added to the level of 100 ppm in each diet, while a non‐carotenoid‐supplemented diet served as a control. In the third experiment, the effect of dietary protein/carbohydrate ratio on melanin content in the skin was investigated. For this experimentation, four diets were formulated to contain 50/23, 40/32, 30/48 and 20/59 protein/carbohydrate ratio. Naturose^® astaxanthin increased total carotenoid content in the dorsal skin area while β‐carotene and lycopene seem to have had no significant effect. Naturose^® was the only carotenoid source that had a significant effect on skin hue, promoting a reddish coloration to the dorsal skin area and a ventral hue similar to wild red porgy. No apparent effect of carotenoid source on skin melanin content was observed. In contrast, dietary protein/carbohydrate ratio affected melanin content in the skin. The fish fed the 50/23 diet showed significantly higher values. Farmed red porgy had eight times higher dorsal‐skin melanin content than wild ones.  相似文献   

Indoor Aerosol Particle Deposition in an Empty Office     

Jiří Smolík  Mihalis Lazaridis  Pavel Moravec  Jaroslav Schwarz  Shamil K. Zaripov  Vladimír Ždímal 《Water, air, and soil pollution》2005,165(1-4):301-312

The size- and time-resolved indoor/outdoor aerosol concentration relationships were studied experimentally in an empty office without internal particle sources. Two Scanning Mobility Particle Sizers (SMPS) and an Aerodynamic Particle Sizer (APS) sampled alternately from indoor and outdoor, together covering the size range 3–10,000 nm. The results showed that the indoor aerosol concentration depends mainly on the air exchange and deposition rates, and the outdoor concentration. At higher air exchange rates the indoor aerosol concentration approaches the outdoor one. This was observed for the accumulation mode particles. The size-dependent deposition rates were estimated using a simple aerosol dynamics experiment. It was based on equilibration of the indoor/outdoor concentrations by opening windows and analyzing the concentration decay curves after the windows were closed. For this purpose a simple mass balance model was used. The overall loss rate and the asymptotic value of indoor concentration were found by applying a non-linear least squares method on the time dependence of the indoor concentrations. The air exchange rate was estimated from the overall loss rate and the steady state values of the indoor/outdoor concentration of the accumulation mode particles.  相似文献   

Computer Simulation of the Transport,Formation and Dynamics of Atmospheric Sulfate Particles     

Lazaridis  Mihalis  Skouloudis  Andreas 《Water, air, and soil pollution》1999,112(1-2):171-185

The present paper investigates the transport, formation and dynamics of atmospheric sulfate particles under different meteorological conditions from point sources. Emissions of SO2 from one and multiple local point sources were modeled. The advection and diffusion of gaseous and particulate matter are described by the atmospheric diffusion equation which is solved numerically using a new developed 3-dimensional model. The evolution of the aerosol size distribution with time was described using the aerosol general dynamic equation. Under fog conditions aqueous phase oxidation is the primary mechanism for sulfate formation. The condensation mechanism from the vapor to liquid phase is the dominant process for sulfate production at moderate relative humidities. The observed mass size distribution of sulfate suggests that the major contribution in the mass size distribution during continental conditions is from long range transport.  相似文献   

Antibacterial effect of Lactococcus lactis subsp. lactis on Artemia franciscana nauplii and Dicentrarchus labrax larvae against the fish pathogen Vibrio anguillarum     

Maria Touraki  Gerda Karamanlidou  Mihalis Koziotis  Ioannis Christidis 《Aquaculture International》2013,21(2):481-495

The antibacterial effect of Lactococcus lactis subsp. lactis against the fish pathogen Vibrio anguillarum was determined in Artemia franciscana nauplii and in European sea bass (Dicentrarchus labrax) larvae fed with ten pulses of nauplii enriched with L. lactis. The evaluation of the bactericidal activity of the extracellular products of L. lactis in vitro showed inhibition of growth of Vibrio (Listonella) anguillarum and Photobacterium damselae subsp. piscicida. The incorporation of L. lactis in Artemia nauplii did not affect their survival and offered protection in a challenge with V. anguillarum, significantly increasing LD₅₀. The administration of Artemia nauplii enriched with L. lactis for 48 h to sea bass larvae for five consecutive days had no adverse effect on survival of fish. In an in vivo challenge test with V. anguillarum using sea bass larvae, fish treated with nauplii enriched with the probiotic L. lactis showed significantly (P < 0.001) increased survival rates of 81 % compared with the untreated group of challenged fish (24 %). Our results indicate that L. lactis is a probiotic suitable to be used for the prevention of vibriosis in fish larvae and can be safely administered through their live feed Artemia nauplii.  相似文献   

Preliminary results on detection of maize treated with electrons for seed dressing and according decontamination and infestation     

Mihalis Cutrubinis  Henry Delincée  Mario Stahl  Olaf Röder  Hans Jürgen Schaller 《Gesunde Pflanzen》2005,57(5):129-136

Zusammenfassung Saatgut und Getreide kann mit niederenergetischen Elektronen (<300 keV) oder hochenergetischen Elektronen (1–10 MeV) wirksam behandelt werden, um Mikroorganismen und Insekten abzutöten. In dieser vorläufigen Studie wurde Mais mit niederenergetischen (125 keV) und hochenergetischen Elektronen (10 MeV) behandelt. Um diese Elektronenbehandlung nachzuweisen, wurden verschiedene Verfahren eingesetzt: Photostimulierte Lumineszenz (PSL), Thermolumineszenz (TL) und DNA-Kometentest. Für diese drei Nachweismethoden existieren bereits Europäische Normen und sie sind als Allgemeine Codex Methoden zum Nachweis bestrahlter Lebensmittel etabliert. Die Ergebnisse zeigen, dass PSL und TL geeignete Verfahren sind, um sowohl eine Behandlung von Mais mit niederenergetischen als auch mit hochenergetischen Elektronen zu erkennen. Der DNA-Kometentest erwies sich als weniger geeignet: die Behandlung mit niederenergetischen Elektronen konnte—wie erwartet—nicht nachgewiesen werden. Die Behandlung mit hochenergetischen Elektronen konnte bei einer Maissorte erkannt werden, jedoch nicht bei einer anderen Sorte.  相似文献