Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 3

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Odmiany polimorficzne węglanu wapnia na powierzchni plech ulva (chlorophyta) notowanych w wodach słodkich

100%
Messyasz B., Pikosz M., Rybak A.
Kosmos
|
2014
|
vol. 63
|
issue 1
117-124
PL
Proces kalcyfikacji, czyli wytrącanie węglanu wapnia w postaci kalcytu zachodzi zarówno wśród morskich, jak i słodkowodnych glonów. Dane literaturowe o inkrustowanych słodkowodnych makroglonach dotyczą głównie grupy ramienic (ramienicowe). Poza silnie inkrustowanymi gatunkami z rodzaju Chara (CaCO3 może stanowić 60% suchej masy), również wśród przedstawicieli z rodzaju Ulva zespoły kryształów wapniowych intensywnie pokrywają powierzchnie plech (∼50% suchej masy). W związku z dużą liczbą inkrustów plechy zielenic są szorstkie w dotyku. Przeprowadzona analiza elektronowej mikroskopii skaningowej (SEM) wykazała różnorodność morfologiczną kryształów. Wśród inkrustów dominowały głównie kryształy o kształcie romboedru (kalcyt), a w mniejszym stopniu występował węglan wapnia w postaci aragonitowych igieł.
EN
Process of calcification, which is the formation of calcite - a pure calcium carbonate mineral, commonly takes place among both marine and freshwater algae. The available literature referring to inland waters provides a lot of information about calcareous macroalgae, mainly on extensively encrusted species of Chara, called stoneworts. In addition to this group, where CaCO3 may provide 60% of dry weight, also freshwater green alga Ulva is prone to CaCO3 precipitation (up to 50% of dry weight). Freshwater Ulva exhibit an extracellular calcification mode and the deposits form bands on the surface of a thallus. Owing to a large number of calcite crystals the surface is quite coarse. Microscopic observations demonstrated differences in the size and shape of crystals and divided them into two morphology types of CaCO3 microcrystals: calcite rhombohedrons and aragonite needles. The percentage of CaCO3 in the thalli was about 50% of dry weight.
2
Content available remote

Biomass of freshwater Cladophora as a raw material for agriculture and the cosmetic industry

76%
Messyasz B., Leska B., Fabrowska J., Pikosz M., Roj E., Cieslak A., Schroeder G.
Open Chemistry
|
2015
|
vol. 13
|
issue 1
EN
This study was undertaken to determine mineral content, amino acid and fatty acid composition of the freshwater macroalga – Cladophora glomerata. The studies were based on the content comparison in algal biomass collected from a lake and cultured in a laboratory. To determine the ability of copper cumulating by macroalgae, Cladophora was cultured in the medium supplemented with Cu ions. This study indicated that the relative abundance of metals in filaments decreased in the following order: Ca > K > Mg > Na > Fe > Cu > Zn > Pb > As > Ni > Cd > Mn > Cr > Co. Total protein content ranged from 14.45% in Cladophora from a lake to 26.55% in Cladophora from a laboratory. The main amino acids analyzed were aspartic and glutamic acid. The fatty acid content in the dry matter of the extract varied depending on the extraction method used: ethylene alcohol (19.0%), acetone (34.5%) or supercritical fluid extraction (62.5%). Freshwater C. glomerata due to the macrominerals, trace elements, amino and fatty acids composition in the extracts can be a valuable resource for nutritional and cosmetic applications.
3
Content available remote

Effects of organic compounds on the macroalgae culture ofAegagropila linnaei

76%
Messyasz B., Leska B., Fabrowska J., Pikosz M., Cieslak A., Schroeder G.
Open Chemistry
|
2015
|
vol. 13
|
issue 1
EN
The effects of the impact of four organic compounds (ascorbic acid, biotin, glucose and sucrose) on ash, protein, fiber, fat and amino acid contents in the freshwater Aegagropila linnaei biomass were examined in 7 and 14 days of cultivations in high concentrations of tested compounds (100 mg L-1). The presence of examined organic compounds had a negligible effect on the development of algae and their biomass composition. There were no significant differences in the amino acids composition in the biomass in the presence of organic compounds compared to the test system. However, the increase in ash content was observed irrespective of the cultivation time in the case of all used organic compounds. Only slight differences in crude fat concentration were observed in the case of 7 days cultivation with ascorbic acid, biotin and sucrose, while the highest increase of ash content was observed after 14 days of supplementation with glucose. None of the compounds affected changes in amino acid content in the Aegagropila linnaei biomass. The results suggest that an environment enriched with the test organic compounds had only minimal, or at most short-term, effects on the algal biomass composition.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.