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Avigad Vonshak - One of the best experts on this subject based on the ideXlab platform.
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Fatty Acid Composition of Spirulina and spirulina -like cyanobacteria in relation to their chemotaxonomy
Phytochemistry, 1991Co-Authors: Zvi Cohen, Avigad VonshakAbstract:The fatty Acid Composition of several Spirulina -like cyanobacteria strains was investigated. While, on the basis of morphology alone, these strains could not be distinguished from Spirulina , their fatty Acid Composition demonstrated a different pattern having large amounts of 18:3 (9, 12, 15), 16: 1 or 16:2, but small quantitites of -linolenic Acid. On the basis of these findings, it is suggested that fatty Acid Composition might be utilized for the classification of Spirulina strains.
Tony D. Williams - One of the best experts on this subject based on the ideXlab platform.
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Influence of Diet on Fatty-Acid Composition of Depot Fat in Western Sandpipers (Calidris Mauri)
The Auk, 2003Co-Authors: Oliver Egeler, Dana Seaman, Tony D. WilliamsAbstract:Abstract Western Sandpipers (Calidris mauri) have been previously shown to undergo seasonal changes in the fatty Acid Composition of their fat stores, even though they do not show the marked seasonal variation in diet common to many migratory passerines. We investigated the effect of dietary fatty Acid Composition on the fatty Acid Composition of adipose tissue in captive Western Sandpipers by feeding birds experimental diets with different fatty Acid Composition. In addition, we determined the effect of total percentage of fat content of the diet (5 vs. 10%) on fatty Acid Composition of depot fat. Birds maintained normal body mass (24–27 g) throughout all experimental treatments. Most adipose fatty Acids were sensitive to dietary manipulation to some extent. Changes in fatty Acid Composition of the diet had the largest effect on adipose tissue Composition for the essential polyunsaturated fatty Acid linoleate (18:2), whereas it had the least effect for the monounsaturated fatty Acid oleate (18:1). The saturated fatty Acid palmitate (16:0) demonstrated an intermediate capacity to alter fatty Acid Composition of adipose tissue. Total amount of fat in the diet did not influence the effect of diet on fatty Acid deposition. Results of dietary manipulations in this study suggest that diet does explain some of the variation in fatty Acid Composition observed during migration in Western Sandpipers, but that certain fatty Acids can be modulated independently of diet (probably through de novo synthesis, postabsorption modification, or both).
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INFLUENCE OF DIET ON FATTY-Acid Composition OF DEPOT FAT IN WESTERN SANDPIPERS (CALIDRIS MAURI)
The Auk, 2003Co-Authors: Oliver Egeler, Dana A. Acevedo Seaman, Tony D. WilliamsAbstract:Abstract Western Sandpipers (Calidris mauri) have been previously shown to undergo seasonal changes in the fatty Acid Composition of their fat stores, even though they do not show the marked seasonal variation in diet common to many migratory passerines. We investigated the effect of dietary fatty Acid Composition on the fatty Acid Composition of adipose tissue in captive Western Sandpipers by feeding birds experimental diets with different fatty Acid Composition. In addition, we determined the effect of total percentage of fat content of the diet (5 vs. 10%) on fatty Acid Composition of depot fat. Birds maintained normal body mass (24–27 g) throughout all experimental treatments. Most adipose fatty Acids were sensitive to dietary manipulation to some extent. Changes in fatty Acid Composition of the diet had the largest effect on adipose tissue Composition for the essential polyunsaturated fatty Acid linoleate (18:2), whereas it had the least effect for the monounsaturated fatty Acid oleate (18:1). The sa...
Zvi Cohen - One of the best experts on this subject based on the ideXlab platform.
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Fatty Acid Composition of Spirulina and spirulina -like cyanobacteria in relation to their chemotaxonomy
Phytochemistry, 1991Co-Authors: Zvi Cohen, Avigad VonshakAbstract:The fatty Acid Composition of several Spirulina -like cyanobacteria strains was investigated. While, on the basis of morphology alone, these strains could not be distinguished from Spirulina , their fatty Acid Composition demonstrated a different pattern having large amounts of 18:3 (9, 12, 15), 16: 1 or 16:2, but small quantitites of -linolenic Acid. On the basis of these findings, it is suggested that fatty Acid Composition might be utilized for the classification of Spirulina strains.
Oliver Egeler - One of the best experts on this subject based on the ideXlab platform.
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Influence of Diet on Fatty-Acid Composition of Depot Fat in Western Sandpipers (Calidris Mauri)
The Auk, 2003Co-Authors: Oliver Egeler, Dana Seaman, Tony D. WilliamsAbstract:Abstract Western Sandpipers (Calidris mauri) have been previously shown to undergo seasonal changes in the fatty Acid Composition of their fat stores, even though they do not show the marked seasonal variation in diet common to many migratory passerines. We investigated the effect of dietary fatty Acid Composition on the fatty Acid Composition of adipose tissue in captive Western Sandpipers by feeding birds experimental diets with different fatty Acid Composition. In addition, we determined the effect of total percentage of fat content of the diet (5 vs. 10%) on fatty Acid Composition of depot fat. Birds maintained normal body mass (24–27 g) throughout all experimental treatments. Most adipose fatty Acids were sensitive to dietary manipulation to some extent. Changes in fatty Acid Composition of the diet had the largest effect on adipose tissue Composition for the essential polyunsaturated fatty Acid linoleate (18:2), whereas it had the least effect for the monounsaturated fatty Acid oleate (18:1). The saturated fatty Acid palmitate (16:0) demonstrated an intermediate capacity to alter fatty Acid Composition of adipose tissue. Total amount of fat in the diet did not influence the effect of diet on fatty Acid deposition. Results of dietary manipulations in this study suggest that diet does explain some of the variation in fatty Acid Composition observed during migration in Western Sandpipers, but that certain fatty Acids can be modulated independently of diet (probably through de novo synthesis, postabsorption modification, or both).
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INFLUENCE OF DIET ON FATTY-Acid Composition OF DEPOT FAT IN WESTERN SANDPIPERS (CALIDRIS MAURI)
The Auk, 2003Co-Authors: Oliver Egeler, Dana A. Acevedo Seaman, Tony D. WilliamsAbstract:Abstract Western Sandpipers (Calidris mauri) have been previously shown to undergo seasonal changes in the fatty Acid Composition of their fat stores, even though they do not show the marked seasonal variation in diet common to many migratory passerines. We investigated the effect of dietary fatty Acid Composition on the fatty Acid Composition of adipose tissue in captive Western Sandpipers by feeding birds experimental diets with different fatty Acid Composition. In addition, we determined the effect of total percentage of fat content of the diet (5 vs. 10%) on fatty Acid Composition of depot fat. Birds maintained normal body mass (24–27 g) throughout all experimental treatments. Most adipose fatty Acids were sensitive to dietary manipulation to some extent. Changes in fatty Acid Composition of the diet had the largest effect on adipose tissue Composition for the essential polyunsaturated fatty Acid linoleate (18:2), whereas it had the least effect for the monounsaturated fatty Acid oleate (18:1). The sa...
M Krieg - One of the best experts on this subject based on the ideXlab platform.
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fatty Acid Composition of phospholipids in epithelium and stroma of human benign prostatic hyperplasia
The Prostate, 1998Co-Authors: H Weisser, M KriegAbstract:BACKGROUND: Although it is well known that prostatic 5alpha-reductase is active only in its membrane-bound form, rather limited information is available concerning the Composition of cellular lipids in human BPH. Therefore, in the present study, the phospholipid fatty Acid Composition and content in epithelium and stroma of human BPH have been investigated for the first time. METHODS: Phospholipids separated on TLC plates were methylated and fatty Acid methyl esters were analyzed by capillary gas chromatography. RESULTS: The fatty Acid Composition of total phospholipids was significantly different between epithelium and stroma. In particular, the percentage of oleic Acid was significantly higher in epithelium as compared with stroma, whereas that of arachidonic Acid was significantly lower in epithelium than in stroma. In addition, significant differences between epithelium and stroma were found in regard to the fatty Acid Composition of the main phospholipid subclasses. Another remarkable finding were the age-dependent changes of the fatty Acid Composition in human BPH. CONCLUSIONS: This study shows that the fatty Acid Composition of phospholipids is significantly different between epithelium and stroma of human BPH. Furthermore, age-dependent alterations of the fatty Acid Composition were found. Further studies are needed to determine whether the endogenous hormonal milieu in the prostate modulates the fatty Acid Composition of the prostatic cells, as well as what impact such modulation could have on the properties of membrane proteins, i.e., enzymes like the 5alpha-reductase and receptors, which are thought to be affected by alterations in membrane fluidity or Composition, or both.
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Fatty Acid Composition of phospholipids in epithelium and stroma of human benign prostatic hyperplasia.
The Prostate, 1998Co-Authors: H Weisser, M KriegAbstract:BACKGROUND Although it is well known that prostatic 5α-reductase is active only in its membrane-bound form, rather limited information is available concerning the Composition of cellular lipids in human BPH. Therefore, in the present study, the phospholipid fatty Acid Composition and content in epithelium and stroma of human BPH have been investigated for the first time. METHODS Phospholipids separated on TLC plates were methylated and fatty Acid methyl esters were analyzed by capillary gas chromatography. RESULTS The fatty Acid Composition of total phospholipids was significantly different between epithelium and stroma. In particular, the percentage of oleic Acid was significantly higher in epithelium as compared with stroma, whereas that of arachidonic Acid was significantly lower in epithelium than in stroma. In addition, significant differences between epithelium and stroma were found in regard to the fatty Acid Composition of the main phospholipid subclasses. Another remarkable finding were the age-dependent changes of the fatty Acid Composition in human BPH. CONCLUSIONS This study shows that the fatty Acid Composition of phospholipids is significantly different between epithelium and stroma of human BPH. Furthermore, age-dependent alterations of the fatty Acid Composition were found. Further studies are needed to determine whether the endogenous hormonal milieu in the prostate modulates the fatty Acid Composition of the prostatic cells, as well as what impact such modulation could have on the properties of membrane proteins, i.e., enzymes like the 5α-reductase and receptors, which are thought to be affected by alterations in membrane fluidity or Composition, or both. Prostate 36:235–243, 1998. © 1998 Wiley-Liss, Inc.
