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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T.A., Kalachova G.S., Bolsunovsky A.Ya., Degermendzhy A.G.
Заглавие : 241Am distribution in the biomass of freshwater macrophytes
Место публикации : Doklady Biological Sciences. - 2008. - Vol. 421, Is. 1. - С. 254-256. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496608040108
Ключевые слова (''Своб.индексиров.''): americium--carbohydrate--cellulose--lipid--nitrogen--polysaccharide--vegetable protein--article--biomass--bryopsida--cell membrane--cell wall--chemistry--cytoplasm--food chain--growth, development and aging--hydrocharitaceae--metabolism--americium--biomass--bryopsida--carbohydrates--cell membrane--cell wall--cellulose--cytoplasm--food chain--hydrocharitaceae--lipids--nitrogen--plant proteins--polysaccharides
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhila N.O., Kalacheva G.S., Volova T.G.
Заглавие : Effect of salinity on the biochemical composition of the alga Botryococcus braunii Kutz IPPAS H-252
Место публикации : Journal of Applied Phycology. - 2011. - Vol. 23, Is. 1. - С. 47-52. - ISSN 09218971 (ISSN) , DOI 10.1007/s10811-010-9532-8
Ключевые слова (''Своб.индексиров.''): botryococcus--fatty acid composition--lipid content--salinity--algae--botryococcus--botryococcus braunii
Аннотация: The effect of 0.3 and 0.7 M NaCl on biomass yield, total nitrogen content, intracellular lipid content, and fatty acid profile of the lipids of the alga Botryococcus braunii IPPAS H-252 in different phases of the culture cycle was studied. The presence of sodium chloride in the medium inhibited the growth of algal cells for the first 3 days of the experiment, causing a decrease in total nitrogen, enhanced synthesis of triacylglycerols, and considerable changes in the lipid fatty acid profile: decreases in polyenoic acid contents (from 68.34% to 29.38% and 12.8%) and proportions of long-chain saturated acids (from 0.53% to 5.3% and 14.13% of the total fatty acids) at 0.3 M NaCl and 0.7 M NaCl, respectively. In later phases of the culture, at 0.3 M NaCl, the content of polyenoic acids rose to the values characteristic of the active growth phase of this alga. At 0.7 M NaCl, the proportion of polyenoic acids grew less significantly, but biomass concentration and total nitrogen increased, similarly to the experiment with 0.3 M NaCl. В© 2010 Springer Science+Business Media B.V.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalacheva G.S., Volova T.G.
Заглавие : Fatty acid composition of Wautersia eutropha lipids under conditions of active polyhydroxyalkanoates synthesis
Место публикации : Microbiology. - 2007. - Vol. 76, Is. 5. - С. 535-540. - ISSN 00262617 (ISSN) , DOI 10.1134/S0026261707050049
Ключевые слова (''Своб.индексиров.''): fatty acids--polyhydroxyalkanoates--wautersia eutropha--cupriavidus necator
Аннотация: The fatty acid composition of the lipids of a Wautersia eutropha polyhydroxyalkanoate-producing strain was studied by chromato-mass spectrometry. A total of 27 fatty acids were identified; their distribution in the cell fractions was determined. In the cytoplasmic membrane, palmitic, palmitoleic, and cis-vaccenic acids were the major components. Long-chain ?-hydroxy acids and myristic acids (components of the lipopolysaccharides of the cell envelope) predominated in the fraction of strongly bound lipids. When the polymer was actively synthesized, the content of cyclopropane acids in the easily extracted lipids increased and the content of the corresponding monoenoic acids decreased. The strongly bound lipids had a high content of long-chain ?-hydroxy acids (more than 50% of the total fatty acids). These results made it possible to determine the source of polyhydroxyalkanoate (PHA) contamination and to choose the strategy for their purification. В© 2007 Pleiades Publishing, Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhila N.O., Kalacheva G.S., Volova T.G.
Заглавие : Effect of nitrogen limitation on the growth and lipid composition of the green alga Botryococcus braunii Kutz IPPAS H-252
Место публикации : Russian Journal of Plant Physiology. - 2005. - Vol. 52, Is. 3. - С. 311-319. - ISSN 10214437 (ISSN) , DOI 10.1007/s11183-005-0047-0
Ключевые слова (''Своб.индексиров.''): botryococcus--lipids--nitrogen limitation--algae--botryococcus--botryococcus braunii--chlorophyta
Аннотация: The effect of nitrogen limitation in a medium on the composition of intracellular lipids in the alga Botryococcus braunii Kutz IPPAS H-252 in the course of culture development was investigated. Under the conditions of nitrogen limitation, the alga under investigation accumulated lipids as triacylglycerols, and this process was accompanied by substantial changes in the total fatty acid (FA) composition, which were manifested in a decrease in trienoic acids (from 52.8-57.2 to 19.5-24.7% of total FAs) and an increase in the content of oleic (from 1.1-1.2 to 17.1-24.4%) and saturated (from 23.7-26.0 to 32.9-46.1%) acids. In the control culture, the directionality of FA redistribution was less marked, and these changes were noticed at the later stages of culture development. Under nitrogen limitation, marked changes in the FA composition of polar lipids occurred by the 13th day, and they were characterized by an increase in the content of saturated acids (up to 76.8%) and a dramatic decrease in the content of all polyenoic acids (up to 6.8%). The changes in the FA composition of triacylglycerols were noticed as early as by the 7th day; these changes consisted in an increase in the content of oleic acid, and its high content (28.4-38.4%) was maintained up to the end of culturing. In the control culture, triacylglycerols with a high content of oleic acid were found by the 13th day, although, by this time, the content of total lipids and triacylglycerols did not change. В© 2005 MAIK "Nauka/Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhila N.O., Kalacheva G.S., Volova T.G.
Заглавие : Influence of nitrogen deficiency on biochemical composition of the green alga Botryococcus
Место публикации : Journal of Applied Phycology. - 2005. - Vol. 17, Is. 4. - С. 309-315. - ISSN 09218971 (ISSN) , DOI 10.1007/s10811-005-7212-x
Ключевые слова (''Своб.индексиров.''): botryococcus--fatty acids--lipids--nitrogen deficiency--biochemical composition--green alga--algae--botryococcus--botryococcus braunii--chlorophyta
Аннотация: A study has been carried out to investigate the influence of nitrogen deficiency on intracellular lipid composition, including total fatty acid composition of lipids, polar lipids, and triacylglycerols, of the alga Botryococcus braunii Kutz IPPAS H-252 in batch culture. Under nitrogen limitation, the alga accumulates lipids as triacylglycerols and the total fatty acid (FA) composition changes: trienoic acids decrease (from 52.8-57.2 to 19.5-24.7% of the total FAs) and the oleic acid increases (from 1.1-1.2 to 17.1-24.4%) as does the saturated acids (from 23.7-26 to 32.9-46.1%). A similar rearrangement in the FA spectrum occurs at later times in the control culture, but it is less pronounced. Under nitrogen limitation, considerable changes in the polar lipid FAs are registered at day 13: saturated acids increase (from 28.6-35.5 to 76.8%) and all polyenoic acids markedly decrease (from 56.9-64.1 to 6.8%). Changes in the triacylglycerol fatty acid spectrum are seen on day 7: the oleic acid increases (from 14.7 to 34.2%) and remains at a high level till the end of the culture. In the control, triacylglycerols with large contents of oleic acid are detected at day 13, the total lipids and triacylglycerols still remaining unchanged. В© Springer 2005.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Kalacheva G.S., Zhila N.O.
Заглавие : Specificity of Lipid Composition in Two Botryococcus Strains, the Producers of Liquid Hydrocarbons
Место публикации : Russian Journal of Plant Physiology. - 2003. - Vol. 50, Is. 5. - С. 627-633. - ISSN 10214437 (ISSN) , DOI 10.1023/A:1025636007023
Ключевые слова (''Своб.индексиров.''): botryococcus--hydrocarbons--mass spectra--structure--algae--botryococcus--botryococcus braunii--chlorophyta--eukaryota
Аннотация: The structure of liquid hydrocarbons and fatty acids produced by the green alga Botryococcus was identified. Two representatives of this alga, Botryococcus braunii Kutz, strain IPPAS H-252, introduced into culture earlier and an organism isolated for the first time from the Shira Lake, were used for this identification. Fatty acid composition of B. braunii, strain H-252, lipids was characterized by a high content of trienoic acids of C16-C18 series. The hydrocarbon composition of this strain was represented by straight-chain and branched-chain C14-C28 components; long-chain linear aliphatic C20-C27 hydrocarbons (54.4%) and 2,6,10,14-tetramethylhexadecane (20.5%) predominated among them. The strain H-252 differed in its fatty acid and hydrocarbon composition from the strains described earlier as Botryococcus braunii. The fatty acid composition of the Botryococcus isolate was represented mainly by C12-C32 saturated and monoenoic acids. The hydrocarbons formed by this isolate were represented by dienoic and trienoic components. C29 (48.9-56.3%) and C31 (11.1-16.3%) hydrocarbons predominated among the C23-C31 dienoic hydrocarbons, and C27, C29, and C31 trienoic hydrocarbons comprised 2.5-2.6% of total hydrocarbons. This type of hydrocarbons and the lipid fatty acid composition were characteristic for the race A of B. braunii.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sushchik N.N., Kalacheva G.S., Zhila N.O., Gladyshev M.I., Volova T.G.
Заглавие : A Temperature Dependence of the Intra- and Extracellular Fatty-Acid Composition of Green Algae and Cyanobacterium
Место публикации : Russian Journal of Plant Physiology. - 2003. - Vol. 50, Is. 3. - С. 374-380. - ISSN 10214437 (ISSN) , DOI 10.1023/A:1023830405898
Ключевые слова (''Своб.индексиров.''): cyanobacterium--fatty acids--green algae--lipids--secretion--algae--bacteria (microorganisms)--botryococcus braunii--chlorella vulgaris--chlorophyta--eukaryota--prokaryota--spirulina--spirulina platensis
Аннотация: The effect of ambient temperature on the composition of intracellular fatty acids and the release of free fatty acids (FFA) into a medium by cyanobacterium Spirulina platensis and eukaryotic microalgae, Chlorella vulgaris and Botryococcus braunii, was studied using their batch cultures. It was found that all the species studied, regardless of their taxonomic status, responded to the temperature regime by similar changes in their intracellular fatty acid composition: the relative content of more unsaturated fatty acids decreased with the elevation of temperature. At the same time, in the prokaryote, this temperature shift blocked, first of all, the elongation of 16: 0 to 18:0 and then their further desaturation. In eukaryotes, the change in the desaturation of dienoic to trienoic fatty acids was the most pronounced process. The ratio of dienoic to trienoic fatty acids remained almost unchanged in S. platensis. The relative content of extracellular unsaturated FFA increased in the prokaryotic organism S. platensis at a higher temperature. But no significant changes in the composition of extracellular unsaturated FFA were detected in eukaryotic algae upon temperature elevation.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalacheva G.S., Zhila N.O., Volova T.G.
Заглавие : Lipid and hydrocarbon compositions of a collection strain and a wild sample of the green microalga Botryococcus
Место публикации : Aquatic Ecology. - 2002. - Vol. 36, Is. 2. - С. 317-330. - ISSN 13862588 (ISSN) , DOI 10.1023/A:1015615618420
Ключевые слова (''Своб.индексиров.''): batch culture--botoryococcus braunii--fatty acids--hydrocarbons--lipids--chemical composition--fatty acid--green alga--hydrocarbon--lipid--saline lake--russian federation--algae--bacteria (microorganisms)--botryococcus--botryococcus braunii--chlorophyta
Аннотация: Lipid composition and hydrocarbon structure of two colonial green algae of the genus Botryococcus, i.e., a mu seum strain and a field sample collected for the first time from Lake Shira (Khakasia, Siberia), have been compared. Polar lipids, diacylglycerols, alcohols, triacylglycerols, sterols, sterol esters, free fatty acids and hydrocarbons have been identified among lipids in the laboratory culture. The dominant fraction in the museum strain was formed by polar lipids (up to 50% of the lipids) made up of fatty acids from C12 to C24. Palmitic, oleic, C16 - C18 dienoic and trienoic acids were the main fatty acids of the museum strain. Aliphatic hydrocarbons were found in the lipid of the museum strain. However, these amounted maximally to about 1% of the dry biomass at the end of exponential growth phase. The qualitative and quantitative compositions of FAs and hydrocarbons of the museum strain of Botryococcus, (registered at the Cambridge collection as Botryococcus braunii Kutz No LB 807/1 Droop 1950 H-252) differed from those of the Botryococcus strain described in the literature as Botryococcus braunii. The Botryococcus sp. found in Lake Shira is characterized by a higher lipid content (< 40% of the dry weight). Polar lipids, sterols, triacylglycerols, free fatty acids and hydrocarbons have been identified among lipids in the field sample. The main lipids in this sample were dienes and trienes (hydrocarbons < 60% of total lipid). Monounsaturated and very long chain monounsaturated fatty acids, including C28:1 and C32:1 acids, were identified in the Botryococcus found in Lake Shira. The chemo-taxonomic criteria allow us to unequivocally characterize the organism collected from Lake Shira as Botryococcus braunii race A.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalacheva G.S., Zhila N.O., Volova T.G., Gladyshev M.I.
Заглавие : The effect of temperature on the lipid composition of the green alga Botryococcus
Место публикации : Microbiology. - 2002. - Vol. 71, Is. 3. - С. 286-293. - ISSN 00262617 (ISSN) , DOI 10.1023/A:1015898426573
Ключевые слова (''Своб.индексиров.''): fatty acids--green alga--lipids--temperature--algae--botryococcus--chlorophyta
Аннотация: The lipid composition of the green alga Botryococcus was studied at three different cultivation temperatures: suboptimal (18В°C), optimal (25В°C), and supraoptimal (32В°C). Cultivation at the supraoptimal temperature was found to considerably inhibit the synthesis of nearly all intracellular lipids, except for triacylglycerides, and to influence their fatty acid composition. In particular, the content of trienoic fatty acids was significantly lower at the supraoptimal than at the optimal cultivation temperature. At the same time, the fatty acid composition of the extracellular lipids of the alga virtually did not depend on cultivation temperature. В© 2002 MAIK "Nauka/ Interperiodica".
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalacheva G.S., Zhila N.O., Volova T.G., Gladyshev M.I.
Заглавие : The effect of temperature on the lipid composition of Botryococcus
Место публикации : Mikrobiologiya. - 2002. - Vol. 71, Is. 3. - С. 336-344. - ISSN 00263656 (ISSN)
Ключевые слова (''Своб.индексиров.''): fatty acid--lipid--triacylglycerol--article--biosynthesis--chemistry--comparative study--green alga--growth, development and aging--metabolism--temperature--algae, green--fatty acids--lipids--temperature--triglycerides
Аннотация: The lipid composition of the green alga Botryococcus was studied at three different cultivation temperatures: suboptimal, optimal, and supraoptimal. Cultivation at the supraoptimal temperature was found to considerably inhibit the synthesis of nearly all intracellular lipids, except for triacylglycerides, and to influence their fatty acid composition. In particular, the content of trienoic fatty acids was significantly lower at the supraoptimal than at the optimal cultivation temperature. At the same time, the fatty acid composition of the extracellular lipids of the alga virtually did not depend on cultivation temperature.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Kalacheva G.S., Altukhova O.V.
Заглавие : Autotrophic synthesis of polyhydroxyalkanoates by the bacteria Ralstonia eutropha in the presence of carbon monoxide
Место публикации : Applied Microbiology and Biotechnology. - 2002. - Vol. 58, Is. 5. - С. 675-678. - ISSN 01757598 (ISSN) , DOI 10.1007/s00253-002-0941-8
Ключевые слова (''Своб.индексиров.''): 3 hydroxybutyric acid--acetoacetyl coenzyme a reductase--acetyl coenzyme a acyltransferase--beta hydroxyvalerate--butyrate dehydrogenase--carbon monoxide--electrolyte--hydrogen--oxidoreductase--poly(3 hydroxybutyric acid)--poly(3 hydroxybutyric acid)synthase--polyhydroxyalkanoic acid--polymer--unclassified drug--valeric acid--bacterium--article--autotrophy--bacterial growth--bacterial strain--biomass production--controlled study--crystallization--enzyme activity--molecular weight--nonhuman--synthesis--temperature--wautersia eutropha--carbon monoxide--culture media--cupriavidus necator--fatty acids--lipids--polyesters--bacteria (microorganisms)--negibacteria--ralstonia--wautersia eutropha
Аннотация: It has been found that the carbon monoxide (CO)-resistant strain of the hydrogen bacteria Ralstonia eutropha B5786 is able to synthesise polyhydroxy-alkanoates (PHAs) in the presence of CO under autotrophic conditions. This strain, grown on model gas mixtures containing 5-25% CO (v/v), accumulates up to 70-75% (of absolutely dry matter) PHA, without significant variation in the yield coefficient on hydrogen. No suppression of the activities of the key enzymes of PHA synthesis (?-ketothiolase, acetoacetyl-CoA-reductase, butyrate dehydrogenase and poly-3-hydroxybutyrate synthase) was recorded. The PHA synthesised is a copolymer containing mostly ?-hydroxybutyrate (more than 99 mol%) with trace amounts of ?-hydroxyvalerate. The investigated properties of the polymer (molecular weight, crystallinity, temperature characteristics) do not differ from those of the polymer synthesised on electrolytic hydrogen.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalacheva G.S., Zhila N.O., Volova T.G.
Заглавие : Lipids of the green alga Botryococcus cultured in a batch mode
Место публикации : Microbiology. - 2001. - Vol. 70, Is. 3. - С. 256-262. - ISSN 00262617 (ISSN)
Ключевые слова (''Своб.индексиров.''): batch culture--botryococcus braunii--fatty acids--lipids
Аннотация: The lipid fraction of the green alga Botryococcus cultured in a batch mode was found to contain polar lipids (more than 50% of the total lipids), di- and triacylglycerols, sterols and their esters, free fatty acids, and hydrocarbons. In aging culture, the content of polar lipids somewhat decreased and that of triacylglycerols increased by more than four times. The content of hydrocarbons in the algal biomass did not exceed 0.9% and depended little on the culture age. Intracellular lipids contained saturated and unsaturated (mono-, di-, and trienoic) fatty acids. The maximum content of C16:3 and ?-C18:3 fatty acids (up to 35% of the total fatty acids) was detected in the phase of active growth. The extracellular and intracellular lipids of the alga differed in the proportion of particular lipids and in the fatty acid pattern. В© 2001 MAIK "Nauka/Interperiodica".
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Kalacheva G.S., Altukhova O.V.
Заглавие : The autotrophic synthesis of polyhydroxyalkanoate by alcaligenes eutrophus in the presence of carbon monoxide
Место публикации : Mikrobiologiya. - 2001. - Vol. 70, Is. 6. - С. 745-752. - ISSN 00263656 (ISSN)
Ключевые слова (''Своб.индексиров.''): co inhibition--hydrogen-oxidizing bacteria--polyhydroxyalkanoates (phas)--synthesis--alkane--carbon monoxide--fatty acid--hydroxyacid--lipid--nitrogen--polyester--article--chemistry--culture medium--drug antagonism--growth, development and aging--mass spectrometry--metabolism--wautersia eutropha--alkanes--carbon monoxide--culture media--cupriavidus necator--fatty acids--hydroxy acids--lipids--mass spectrometry--nitrogen--polyesters
Аннотация: The CO-resistant strain B5786 of the hydrogen-oxidizing bacterium Alcaligenes eutrophus was found to be able to synthesize polyhydroxyalkanoates (PHAs) under the conditions of growth limitation by nitrogen deficiency (the factor that promotes PHA synthesis) and growth inhibition by carbon monoxide. The gas mixtures that contained from 5 to 20 vol % CO did not inhibit the key enzymes of PHA synthesis-?-ketothiolase, acetoacetyl-CoA reductase, hydroxybutyrate dehydrogenase, and PHA synthase. In the presence of CO, cells accumulated up to 70-75 wt % PHA (with respect to the dry biomass) without any noticeable increase in the consumption of the gas substrate. Chromatographic-mass spectrometric analysis showed that the PHA synthesized by A. eutrophus is a copolymer containing more than 99 mol % ?-hydroxybutyrate and trace amounts of ?-hydroxyvalerate. The PHA synthesized under the conditions described did not differ from that synthesized by A. eutrophus cells from electrolytic hydrogen.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Kalacheva G.S., Zhyla N.O.
Заглавие : Characteristics of lipids from green alga Botryococcus braunii synthesizing liquid hydrocarbons.
Место публикации : Doklady Biological Sciences. - 2000. - Vol. 370, Is. 1-6. - С. 96-99. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): fatty acid--hydrocarbon--lipid--article--biomass--chemistry--green alga--metabolism--algae, green--biomass--fatty acids--hydrocarbons--lipids
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sushchik N.N., Kuchkina A.Y., Gladyshev M.I.
Заглавие : Fatty acid content and composition of sediments from Siberian eutrophic water bodies: Implications for biodiesel production
Место публикации : Water Research. - 2013. - Vol. 47, Is. 9. - С. 3192-3200. - ISSN 00431354 (ISSN) , DOI 10.1016/j.watres.2013.03.031
Ключевые слова (''Своб.индексиров.''): biodiesel--bottom sediments--fatty acids--fuel properties--inland water bodies--lipids--biological conditions--bottom sediments--environmental characteristic--freshwater reservoirs--fuel properties--inland waters--organic matter source--transformation process--biodiesel--eutrophication--fatty acids--feedstocks--fuels--lipids--reservoirs (water)--sedimentology--thermochemistry--sediments--biodiesel--fresh water--iodine--organic matter--biofuel--bottom water--combustion--eutrophic environment--eutrophication--fatty acid--lacustrine deposit--physicochemical property--reservoir--transformation--article--estuary--eutrophication--fatty acid analysis--lake--lipid composition--priority journal--sediment--khakassia--krasnoyarsk [krasnoyarsk (ads)]--krasnoyarsk [russian federation]--lake shira--russian federation
Аннотация: We studied lipids and fatty acids (FA) in bottom sediments from four Siberian water bodies, Bugach, Lesnoi and Krasnoyarsk freshwater reservoirs and brackish Shira lake, that differed in physico-chemical and biological conditions. We considered the potential of the bottom sediments as a feedstock for biodiesel production and estimated properties of the obtained biodiesel as a fuel on the basis of FA composition. Contents of lipids and FA in the sediments moderately varied and were generally close to the reported data from lacustrine and estuarine systems. We confirmed that long-term eutrophication of a water body resulted in the lipid-rich bottom sediments that make them a feedstock for biodiesel production. Each of the studied water bodies had specific FA composition of sediments likely due to different organic matter sources and transformation processes. Despite these differences in FA profiles, calculated key parameters (cetane number, iodine number and heat of combustion) of biodiesel produced from all the studied sediments met the limits established by current biodiesel standards. Thus, the variation in the sediment FA composition due to environmental characteristics of a water body likely has no principal significance for fuel properties of the obtained biodiesel. В© 2013 Elsevier Ltd.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Makhutova O.N., Sushchik N.N., Gladyshev M.I., Ageev A.V., Pryanichnikova E.G., Kalachova G.S.
Заглавие : Is the fatty acid composition of freshwater zoobenthic invertebrates controlled by phylogenetic or trophic factors?
Место публикации : Lipids. - 2011. - Vol. 46, Is. 8. - С. 709-721. - ISSN 00244201 (ISSN) , DOI 10.1007/s11745-011-3566-9
Ключевые слова (''Своб.индексиров.''): benthic invertebrates--feeding strategy--fish--phylogeny--polyunsaturated fatty acids--arachidonic acid--docosahexaenoic acid--icosapentaenoic acid--article--controlled study--dendrocoelopsis--eulimnogammarus viridis--fatty acid analysis--feeding behavior--freshwater fish--habitat--lipid composition--nonhuman--nutritional value--phylogeny--species differentiation--taxonomy--animals--environment--fatty acids--fresh water--humans--invertebrates--phylogeny--ara--crustacea--dendrocoelopsis--eulimnogammarus viridis--invertebrata--turbellaria
Аннотация: We studied the fatty acid (FA) content and composition of ten zoobenthic species of several taxonomic groups from different freshwater bodies. Special attention was paid to essential polyunsaturated fatty acids, eicosapentaenoic acid (EPA, 20:5n-3), docosahexaenoic acid (DHA, 22:6n-3), and arachidonic acid (ARA, 20:4n-6); and the n-3/n-6 and DHA/ARA ratios, which are important for consumers of higher trophic levels, i.e., fish. The content and ratios of these FA varied significantly in the studied zoobenthic species, consequently, the invertebrates were of different nutritional quality for fish. Eulimnogammarus viridis (Crustacea) and Dendrocoelopsis sp. (Turbellaria) had the highest nutrition value for fish concerning the content of EPA and DHA and n-3/n-6 and DHA/ARA ratios. Using canonical correspondence analysis we compared the FA profiles of species of the studied taxa taking into account their feeding strategies and habitats. We gained evidence that feeding strategy is of importance to determine fatty acid profiles of zoobenthic species. However, the phylogenetic position of the zoobenthic species is also responsible and may result in a similar fatty acid composition even if species or populations inhabit different water bodies or have different feeding strategies. В© 2011 AOCS.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuchkina A., Gladyshev M.I., Sushchik N.N., Kravchuk E.S., Kalachova G.S.
Заглавие : Biodiesel production from sediments of a eutrophic reservoir
Место публикации : Biomass and Bioenergy. - 2011. - Vol. 35, Is. 5. - С. 2280-2284. - ISSN 09619534 (ISSN) , DOI 10.1016/j.biombioe.2011.02.047
Ключевые слова (''Своб.индексиров.''): biodiesel--dredging sediments--eutrophic reservoir--fatty acids--lipids--bio-diesel fuel--biodiesel production--cetane number--dry weight--en 14214--eutrophic reservoirs--heat of combustion--high price--iodine number--is costs--lake restoration--lipid content--production cost--siberia--anoxic sediments--biodiesel--costs--diesel fuels--eutrophication--fatty acids--iodine--lipids--reservoirs (water)--sedimentology--synthetic fuels--thermochemistry--dredging--biofuel--combustion--dredging--environmental restoration--eutrophic environment--iodine--lacustrine deposit--lipid--production cost--reservoir--bugach reservoir--krasnoyarsk [russian federation]--russian federation
Аннотация: Sediments from eutrophic reservoir Bugach (Siberia, Russia) were tested for possibility to produce biodiesel. We supposed that the sediments could be a promising biodiesel producer. The major reason of high price of biodiesel fuel is cost of a raw material. The use of dredging sediments for biodiesel production reduces production costs, because the dredging sediments are by-products which originated during lake restoration actions, and are free of cost raw materials. Lipid content in sediments was 0.24% of dry weight. To assess the potential of from sediments as a substitute of diesel fuel, the properties of the biodiesel such as cetane number, iodine number and heat of combustion were calculated. All of this parameters complied with limits established by EN 14214 and EN 14213 related to biodiesel quality. В© 2011 Elsevier Ltd.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalachova G.S., Gladyshev M.I., Sushchik N.N., Makhutova O.N.
Заглавие : Water moss as a food item of the zoobenthos in the Yenisei River
Место публикации : Central European Journal of Biology. - 2011. - Vol. 6, Is. 2. - С. 236-245. - ISSN 1895104X (ISSN) , DOI 10.2478/s11535-010-0115-0
Ключевые слова (''Своб.индексиров.''): acetylenic fatty acids--bryophytes--fontinalis--gammarids--stable isotope analysis--trichopterans--animalia--bryophyta--bryophytes--chironomidae--ephemeroptera--eulimnogammarus viridis--fontinalis--fontinalis antipyretica--gammaridae--invertebrata--trichoptera
Аннотация: Bryophytes are abundant in streams and are a habitat for many invertebrates, but their contribution to the diet of fluvial zoobenthos is still debated. To estimate the amount of bryophyte-derived organic matter assimilated by benthic invertebrates, we used a combination of fatty acid and stable isotope analyses during a four-year monthly study of a littoral site in the Yenisei River (Siberia, Russia). Acetylenic acids, which are highly specific biomarkers of the water moss Fontinalis antipyretica, were found in lipids of all dominant benthic animals: gammarids, ephemeropterans, chironomids and trichopterans. The dominant zoobenthic species, Eulimnogammarus viridis, had maximum levels of the biomarkers in its biomass during winter, and minimum levels in summer. The zoobenthos in the studied site regularly consume and assimilate bryophyte-derived organic matter as a minor supplemental food. This consumption increases in winter, when the main food source of the zoobenthos, epilithic biofilms, are probably scarce. В© 2010 Versita Warsaw and Springer-Verlag Wien.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalacheva G.S., Sushchik N.N., Gladyshev M.I., Makhutova O.N.
Заглавие : Seasonal dynamics of fatty acids in the lipids of water moss Fontinalis antipyretica from the Yenisei River
Место публикации : Russian Journal of Plant Physiology. - 2009. - Vol. 56, Is. 6. - С. 795-807. - ISSN 10214437 (ISSN) , DOI 10.1134/S1021443709060090
Ключевые слова (''Своб.индексиров.''): acetylenic acids--fatty acids--fontinalis antipyretica--seasonal dynamics--bryophyta--fontinalis antipyretica
Аннотация: Identification of lipid fatty acids (FA) and studying of their seasonal dynamics in water moss Fontinalis antipyretica from the Yenisei River were carried out by means of gas chromatography-mass spectrometry. FA composition of water moss was notable for a relatively low level of saturated acids and predominance of polyunsaturated acids (PUFA) with double bonds (accounting for more than 30% of total FA) and polyunsaturated acids with double and triple bonds (acetylenic acids, accounting for more than 40% of total FA). Among PUFA, ?- and ?-linolenic (18:3?3 and 18:3?6), arachidonic (20:4?6), and eicosapentaenoic (20:5?3) acids prevailed. Relative content of PUFA from ?3-family was the greatest in spring, and the level of PUFA from ?6-group was essentially the same throughout all the seasons. In the biomass of water moss, we identified seven acetylenic acids; among them octadeca-9,12-dien-6-ynoic (6a,9,12-18:3), octadeca-9,12,15-trien-6-ynoic (6a,9,12,15-18:4), and eicosa-11,14-dien-8-ynoic (8a,11,14-20:3) acids were predominant. For the first time, in the lipids of water moss we identified an acetylenic eicosa-11,14,17-trien-8-ynoic acid (8a,11,14,15-20:4). Relative content of acetylenic acids in the total FA was great throughout the entire period of investigation with the peak accumulation in summer. Owing to a steadily high level in the biomass of water moss and the lack of other producers of these acids in the ecosystem, acetylenic FA are highly specific biochemical markers useful for the investigation of trophic interactions between higher aquatic plants and zoobenthos. В© Pleiades Publishing, Ltd., 2009.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sushchik N.N., Yurchenko Y.A., Gladyshev M.I., Belevich O.E., Kalachova G.S., Kolmakova A.A.
Заглавие : Comparison of fatty acid contents and composition in major lipid classes of larvae and adults of mosquitoes (Diptera: Culicidae) from a steppe region
Место публикации : Insect Science. - 2013. - Vol. 20, Is. 5. - С. 585-600. - ISSN 16729609 (ISSN) , DOI 10.1111/j.1744-7917.2012.01582.x
Ключевые слова (''Своб.индексиров.''): amphibiotic insects--essential fatty acids--metamorphosis--mosquitoes--short-chain polyunsaturated fatty acids
Аннотация: Emerging aquatic insects, including mosquitoes, are known to transfer to terrestrial ecosystems specific essential biochemicals, such as polyunsaturated fatty acids (PUFA). We studied fatty acid (FA) composition and contents of dominant mosquito populations (Diptera: Culicidae), that is, Anopheles messeae, Ochlerotatus caspius, Oc. flavescens, Oc. euedes, Oc. subdiversus, Oc. cataphylla, and Aedes cinereus, inhabited a steppe wetland of a temperate climate zone to fill up the gap in their lipid knowledge. The polar lipid and triacylglycerol fractions of larvae and adults were compared. In most studied mosquito species, we first found and identified a number of short-chain PUFA, for example, prominent 14:2n-6 and 14:3n-3, which were not earlier documented in living organisms. These PUFA, although occurred in low levels in adult mosquitoes, can be potentially used as markers of mosquito biomass in terrestrial food webs. We hypothesize that these acids might be synthesized (or retroconverted) by the mosquitoes. Using FA trophic markers accumulated in triacylglycerols, trophic relations of the mosquitoes were accessed. The larval diet comprised green algae, cryptophytes, and dinoflagellates and provided the mosquitoes with essential n-3 PUFA, linolenic, and eicosapentaenoic acids. As a result, both larvae and adults of the studied mosquitoes had comparatively high content of the essential PUFA. Comparison of FA proportions in polar lipids versus storage lipids shown that during mosquito metamorphosis transfer of essential eicosapentaenoic and arachidonic acids from the reserve in storage lipids of larvae to functional polar lipids in adults occurred. В© 2012 Institute of Zoology, Chinese Academy of Sciences.
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