Browsing by Subject "GERMINATION"

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    DINOFLAGELLATE CYST ASSEMBLAGES IN SURFACE SEDIMENTS OF SOUTHWESTERN BLACK SEA AND CANAKKALE STRAIT (DARDANELLES)
    (PARLAR SCIENTIFIC PUBLICATIONS (P S P)) Aydin, H; Balci, M; Uzar, S; Balkis, N
    In order to document the distribution of dinoflagellate cyst assemblages, eight surface sediment samples were collected in surface sediments from southwestern Black Sea and Canakkale Strait. A total of 25 cyst types and 1 unknown cyst type were identified. Samples displays low total cyst concentrations with values ranging from 8 to 346 cyst g(-1) dry weight sediment. Autotrophic dinoflagellates highly and significantly contributes (p<0.01) to the total cyst concentration. Lingulodinium machaerophorum, cyst type of Alexandrium minutum and Spiniferites bulloideus were dominant at the sampling points. Higher cyst concentration and diversity observed at stations in Black Sea could be linked to the type of sediment. Small-sized sediment (sand-silt) were mostly dominant at the Black Sea stations compare to the more sandy type sediment of Canakkale Strait. Present study provides the first modern dinoflagellate cyst records from surface sediments of southwestern Black Sea and Canakkale Strait.
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    An experimental study on the effects copper and lead on the seedlings of some economically important vegetable species
    (UNIV AGR SCI & VETERINARY MED CLUJ-NAPOCA) Candan, F; Ozturk, M; Altay, V; Yalcin, IE
    Bioaccumulation of toxic heavy metals in vegetables is closely related to the problems of safety concerns as they negatively affect plants in particular those consumed by the humans. Among the food systems the vegetables are the most noticeable foods affected by environmental pollution. Vegetables can take up the metals like copper and lead and store them in excessive levels. Keeping this in view this investigation was undertaken to study the effect of copper and lead concentrations (20, 40, 80, 160, 240, 320, 640, and 1280 mu M) and assess their toxic affects on germination and seedling growth at early stages of eight vegetable cultivars; kidney bean, peas, black-eyed bean, artichoke, kale, lettuce, rocket and radish. The results were evaluated by multivariate analysis of variance and Pearson correlation statistical analysis. Our results indicate that the seeds of the vegetables studied by us are generally tolerant to both copper as well lead, except higher concentration exposures which showed no improvement when applied to artichoke (for Cu 1280 mu M) and lettuce seeds (Cu 1280 mu M; Pb 1280 mu M). An application of copper and lead ended up with a decrease in barium, calcium, iron, magnesium, manganese, sodium and zinc content in all seedlings studied. In all vegetables exposed to copper and lead a promotion in copper and lead accumulation was recorded. There was a decrease in nutrient element intake which interrupted the mineral element uptake in the seedlings.
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    A New Analytical Method for the Determination of Phenolic Compounds and Their Antioxidant Activities in Different Wheat Grass Varieties
    (FOUNDATION ENVIRONMENTAL PROTECTION & RESEARCH-FEPR) Kardas, TA; Durucasu, I
    In this work, the phenolic content and antioxidant capacity of wheat grass, Turkish Amber Durum wheat was studied. For this purpose Turkish Amber Durum wheat was germinated at three different times (15, 30 and 40 days). All the wheat samples sprouted in the same organic conditions and then dried with air and without sunlight and placed into an incubator at 50 degrees C overnight. The dried and milled amber wheat grass was extracted with ethyl acetate and compared for their antioxidant capacities against the 2,2-diphenyl-1-picrylhydrazyl (DPPH.) radical, and at the same time the total phenolic content (TPC) was determined. Phenolic compounds in the extracts were examined by high performance liquid chromatography (HPLC). In this study, by using a new method, nine standards were separately detected within 50 min by using the HPLC system, as previously reported by other authors. The major phenolics, identified in the wheat grass that consisted of ferulic acid, gallic acid, caffeic acid, p-coumaric acid, ellagic acid, benzoic acid, p-hydroxybenzoic acid, syringic acid, quercetin and bha (butylated hydroxyanisole). The highest antioxidant and antiradical activities were detected in Turkish Amber wheat that sprouted in 15 days. This study demonstrates that the importance of wheat grass is due to its high antioxidant activity Consumption of wheat grass has positive effects on human health such as reduced risk of coronary heart diseases, certain type of cancers and stroke. Due to the high antioxidant effect of wheat grass the aim is to use it as a food preservative. When wheat grass will be used as a natural food preservative, carcinogenic effects of synthetic food preservatives for body would be preserved.