Wyniki wyszukiwania - BazTech

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Wpływ temperatury na przyrost biomasy mikroalg słodkowodnych hodowanych w bioreaktorach laboratoryjnych

Dziosa K., Makowska M.

Inżynieria i Aparatura Chemiczna

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2015

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Nr 4

152--153

PL

W pracy przedstawiono wyniki badań wpływu temperatury na wydajność produkcji biomasy alg słodkowodnych. Laboratoryjną hodowlę prowadzono w szklanych bioreaktorach cylindrycznych w temperaturze 26, 28 oraz 30°C. Zawartość biomasy w podłożu hodowlanym oznaczano metodą wagową. Najwyższą efektywność przyrostu biomasy uzyskano prowadząc hodowlę alg w temperaturze 28°C. Wzrost temperatury do 30°C nie powodował zwiększenia produktywności biomasy.

EN

The paper presents the influence of temperature on the efficiency of freshwater algae biomass production. Laboratory culture was carried out incylindrical glass bioreactors at 26, 28 and 30°C. The content of biomass in the culture medium was determined by dry weight measurement. The highest efficiency of algae biomass growth was obtained at 28°C. The incrase of biomass production with the rise of temperature to 30°C was not observed.

2

Analiza palinologiczna mioceńskich wypełnień lejów krasowych w Tarnowie Opolskim na Wyżynie Śląskiej - wyniki wstępne

Worobiec E., Szulc J.

Przegląd Geologiczny

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2010

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Vol. 58, nr 12

1176-1181

EN

Pollen analysis of 16 samples of coaly sediments taken from one of sinkholes developed within the Triassic limestones cropping out at Tarnów Opolski, Upper Silesian Upland has been done. The study revealed a taxonomically rich assemblage of excellently preserved sporomorphs (pollen grains and spores) as well as microfossils of fresh-water algae (mainly Chlorophyta). The pollen analysis made it possible to reconstruct a vegetation growing during sedimentation of deposits filling the studied sinkhole and clear facies succession, from open aquatic (with abundant fresh-water algae) to marshy one (e.g. swamp forests composed of Taxodium, Nyssa and Alnus). Riparian forests dominated by deciduous trees, e.g. Pterocarya, Carya and Liquidambar, grew on wet terrains surrounding the water body. Drier elevated terrains were overgrown by mixed mesophytic forests with small admixture of thermophilous plants. Results of the pollen analysis indicate that during the sedimentation of the sinkhole filling the climate was warm temperate and moderately wet. Recorded sporomorphs and a mutual ratio of arctotertiary and palaeotropical taxa point at a Middle Miocene age of the studied deposit.

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Kopalne zygospory glonów Zygnemataceae (Chlorophyta) z osadów górnego miocenu KWB Bełchatów

Worobiec E., Worobiec G.

Przegląd Geologiczny

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2008

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Vol. 56, nr 11

1000-1004

EN

The Zygnemataceae are an extant family of freshwater filamentous green algae which produce acid-resistant zygospores. Palynomorphs of probable zygnematacean affinity occur in sediments of the Carboniferous to Holocene age (van Geel & Grenfell, 1996). These algae reproduce using four types of spores, but only zygospores and probably aplanospores are acid-resistant and can be preserved in the fossil record. The majority of recent species have zygospores of constant form of three types: elliptical (occurring in genera Debarya and Spirogyra), square (occurring in Mougeotia) or circular (occurring in Zygnema). The zygospores normally have a three-layered wall (exospore, mesospore and endospore), but only mesospore contains a decay and acid-resistant substance (most probably algaenans), so usually only this layer is preserved in fossil state, and is of interest to palynologists. The mesospore layer is smooth or ornamented with various sculptures (Kadłubowska, 1972; Grenfell, 1995). The shape and sculpture are very important features for determination of both the recent and fossil species. Two samples from the Bełchatów Lignite Mine were palynologically examined and two types of probable fossil zygnematacean zygospores, differing in shape, were encountered. The following species have been distinguished: Tetraporina sp., Spintetrapidites quadriformis Krutzsch & Pacltová as well as Ovoidites elongatus (Hunger) Krutzsch, and O. ligneolus Potonié ex Krutzsch. The fossil genus Tetraporina is usually related to the recent zygnematacean algae zygospores of Mougeotia genus, fossil Ovoidites is the nearest the recent zygospores of Spirogyra and Sirogonium, while Spintetrapidites is similar to both zygospores of Zygnemataceae and Tetraedron green algae. Species of recent genera Mougeotia and Spirogyra are usually found in shallow, freshwater, oxygen-rich environments such as ponds, lake margins (paludal or low gradient fluvial), ditches and very slowly moving streams (Kadłubowska, 1972). Occurrence of Tetraporina and Ovoidites zygnematacean zygospores in the material studied from Bełchatów points out at presence of water basin(s) during sedimentation time. That confirms the previous geological results that formation of examined sediments took place in the environment of a meandering river (including ox-bow lakes).