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1.
An experiment was conducted to evaluate semipurified test diets for Tilapia zillii fingerlings. Four isocaloric (300 kcal dietary energy/100 g) diets containing casein (at 30 and 39%). casein supplemented with L-arginine (Arg) and casein/gelatin mixture as protein sources were fed to triplicate groups of T. zillii fingerlings at a daily rate of 3% of their body weight for 6 weeks. When casein was fed as the sole dietary protein source at 30% level, fish growth, feed conversion efficiency (FC) and protein efficiency ratio (PER) were significantly reduced. Those variables were significantly improved when casein was supplemented with Arg. The group of fish fed casein/gelatin diet showed the best growth and feed utilization. When casein was increased to 39% to meet the Arg requirement, fish growth and feed conversion were not significantly different from those of fish fed casein/gelatin diet, while PER and protein production value (PPV) were significantly reduced. These results indicated that casein/gelatin is superior to casein or casein/Arg as a protein source in semipurified test diets for T. zillii fingerlings. 相似文献
2.
Ahmed S. A. Abbas Eman El-Wazzan Amal R. Khafage Abdel-Fattah M. El-Sayed Fatma A. Abdel Razek 《Aquaculture International》2018,26(5):1297-1309
Studies considering broodstock conditioning of Ruditapes decussatus mostly used flagellates and diatoms for feeding, mainly Isochrysis galbana and Chaetoceros calcitrans, respectively. The present study evaluated the effect of different microalgal diets on gonadic maturation of R. decussatus including three microalgae species (C. calcitrans, Tetraselmis suecica, and Nannochloropsis oculata) which were used to prepare six diets: three monospecific and three bispecific mixed diets at a proportion of 1:1. Clams were daily fed at a ratio of 1% dry weight of algae/live weight of clam and unfed treatment was used as control. Results showed that clams fed C. calcitrans alone or mixed with T. suecica attained earlier full maturity with the highest response to spawning induction (after 34 conditioning days) and largest proportion in the partial spawning phase for both, followed by T. suecica alone after 48 days. In contrast, N. oculata alone or mixed diets demonstrated poor performance for gonadal maturation. Unfed treatment did not show any sign of maturation. The results indicated that T. suecica has high conditioning potential like C. calcitrans and their mixture gave the highest benefit. Therefore, T. suecica can be recommended for R. decussatus broodstock conditioning. 相似文献
3.
A. F. Abdel-Fattah M. Edrees 《Plant foods for human nutrition (Dordrecht, Netherlands)》1972,22(1):15-22
A uronic acid — containing polysaccharide was isolated from the green marine algal speciesUlva lactuca by extraction with water, dilute hydrochloric acid solution, and ammonium oxalate solution. The latter agent was the best for extracting the highest amount of the polysaccharide material which contained glucuronic acid (11.4%), glucose (3.64%), arabinose (5.01%), xylose (4.55%), and rhamnose (27.33%). Partial acid hydrolysis studies and attempted fractionation on DEAE-cellulose pointed out that the polymeric carbohydrate material ofUlva lactuca may be a heteropolysaccharide. This polysaccharide appeared to contain, besides its main backbone, sequences involving glucose, arabinose and xylose.
Zusammenfassung Aus dem Thallus der marinen GrünalgeUlva lactuca L. wurde durch Extraktion mit Wasser, verdünnter Salzsäure und Ammoniumoxalat-Lösung eine Polysaccharid-haltige Uronsäure isoliert. Als bestes Extraktionsmittel erwies sich dabei die Ammoniumoxalat-Lösung, da damit die höchsten Ausbeuten erzielt werden konnten. Das Polysaccharid-haltige Material enthielt Glucuronsäure (11,4%), Glucose (3,64%), Arabinose (5,01%), Xylose (4,55%) und Rhamnose (27,33%).Untersuchungen über partielle Säurehydrolyse und Fraktionierung auf DEA-Cellulose ergaben, daß das polymere Kohlehydratmaterial derUlva lactuca L. ein Heteropolysaccharid sein kann. Dieses Polysaccharid enthält wahrscheinlich neben seinem Hauptbestandteil weitere Verbindungen mit Glucose, Arabinose und Xylose.
Résumé Un uronique acide — contenant polysaccharide a été isolé d'un vert genre d'algue marinUlva lactuca par extraction avec l'eau, dilue une solution de hydrochlorique acide, et une solution d'ammonium oxalate. La dernière action a été la meilleur pour son extraction de la plus grande quantité du polysaccharide materiel qui contient glucuronique acide (11.4%), glucose (3.64%), arabinose (5.01%), xylose (4.55%), et rhamnose (27.33%). Les études concernant le partial hydrolysis acide et la fractionation essayée sur DEAE-cellulose marquent que le material du carbohydrate polymeriqued'Ulva lactuca peut être un heteropolysaccharide. Ce polysaccharide apparait qu'il contient à côté de son propre material, des successions contenant résidus de glucose, arabinose et xylose.相似文献
4.
A. F. Abdel-Fattah M. M. Hussein 《Plant foods for human nutrition (Dordrecht, Netherlands)》1973,22(2):181-187
Isolation of water insoluble laminaran-like polysaccharide has been achieved fromSargassum linifolium by extraction with hydrochloric acid and oxalic acid solutions. The conditions of the extraction with both acid solutions were studied. The quality of the isolated products was also evaluated.
Zusammenfassung AusSargassum linifolium wurden durch Extraktion mit Salzsäure und Oxalsäure wasserunlösliche Laminarin ähnliche Polysaccharide isoliert. Die Zusammensetzung und die Eigenschaften beider Extrakte wurden untersucht.
Résumé L'isolation de l'insoluble laminarane-comme polysaccharide a été completée duSargassum linifolium par l'extraction avec les solutions de l'acide hydrochlorique et l'acide oxalique. Les conditions de l'extraction avec les solutions des deux acides ont été étudiées. La qualification des produits isolés a été encore évaluée.相似文献
5.
Abdel-Fattah M Amer H Ghoneim MA Warda M Megahed Y 《Zentralblatt für Veterin?rmedizin. Reihe A》1999,46(8):473-481
The effects of glucagon injection and infusion of glucose and volatile fatty acids were studied in one-humped camels. Twenty adult male camels were divided into four equal groups. The first group was infused with physiological saline and served as a control. The second group was injected with a single dose of glucagon, the third group was infused with glucose (50%) in sterile saline, and the fourth group was infused with a volatile fatty acid (VFA) mixture. In the first, third and fourth groups, sampling was performed before the beginning of infusions (control time), and at 15, 30, 60 and 120 min post-infusion. Plasma glucagon concentrations were monitored in the second group at 5, 10, 15, 20, 30, 45, 90, 105 and 120 min after injection. For glucagon injection, glucose concentration peaked at 15 min post-injection, and tended to decrease thereafter. Plasma glucose concentrations showed significant rises above the basal value at all times after glucose infusion. VFA infusion had no apparent effect on plasma glucose concentration. After injection of glucagon, the plasma lactate concentration dropped significantly at 15 and 30 min, then increased gradually until it reached the original concentration of lactate at 120 min. However, glucose infusion elevated the plasma lactate concentration only at the end of the infusion period. A decrease in plasma lactate was observed at 60 min after VFA infusion. The present investigation provides evidence that the glucagon level in camels is higher than that in other ruminants and in man, and suggests that this is a probable species specificity, which would explain the higher level of glucose in the blood of camels than in that of other ruminants. The disappearance curve of injected glucagon had, as in other ruminants, an exponential two-compartment function. The hormone was rapidly distributed and was eliminated with a high rate of clearance. 相似文献
6.
A. F. Abdel-Fattah N. M. Abed M. Edrees 《Plant foods for human nutrition (Dordrecht, Netherlands)》1973,22(2):171-179
The constituents of the red seaweedLaurencia papillosa were investigated in different seasons. Protein and galactan comprised the major components of the algal material. Acid hydrolysis of the alga afforded galactose, glucose, xylose, ribose and glucuronic acid. The alga was shown to contain cholesterol, -sitosterol and lanosterol. Free amino acids as well as the amino acid composition of the isolated proteins were also investigated. The algal components showed different seasonal variations.
Zusammenfassung Der rote SeetangLaurencia papillosa wurde zu verschiedenen Jahreszeiten auf seine Bestandteile hin untersucht. Protein und Galactan bilden die Hauptbestandteile des Algenmaterials. Säurehydrolyse der Alge ergibt Galactose, Glucose, Xylose, Ribose und Glucuronsäure. Die Alge enthält ferner Cholesterol, -Sitosterol und Lanosterol. Die freien Aminosäuren wurden ebenso untersucht wie die Aminosäuren-Zusammensetzung der isolierten Proteine. Die Bestandteile der Alge zeigten unterschiedliche jahreszeitliche Schwankungen.
Résumé Les constituants du rouge algueLaurencia papillosa ont été examinés dans les differentes saisons. Protéines et galactane ont composé la majorité des contenants du materiel algual. L'acide hydrolysé d'algue a offré galactose, glucose, xylose, ribose et glucuronique acide. L'algue a été paru comprendre cholesterol, -sitosterol et lanosterol. Les libres amino acides comme l'amino acid composition du protéine isolé ont été encore examinés. Les contenants alguales ont manifesté des differentes variations saisonales.相似文献
7.
Abdel-Fattah M El-Sayed 《Aquaculture Research》2002,33(8):621-626
The effects of stocking density and feeding levels on larval survival, growth rates, feed utilization efficiency and body composition of Nile tilapia (Oreochromis niloticus L.) fry were investigated in two consecutive experiments. In experiment 1, swimup fry (0.016 g average body weight) were stocked in 20‐L fibreglass tanks, in a closed, recirculating indoor system, at five stocking densities (3, 5, 10, 15 and 20 fry L?1) and fed a larval test diet (40% crude protein) to apparent satiation, three times a day, for 40 days. Fish survival, percentage weight gain and specific growth rate (% SGR) were negatively correlated with stocking density. The best performance was achieved at 3 fry L?1. However, no significant differences in growth parameters were found between 3 and 5 fry L?1. Body composition was not significantly affected by stocking density. In experiment 2, fry (0.016 g average body weight) were stocked at 5 fry L?1, and fed a larval test diet (40% crude protein) at six feeding levels (10%, 20%, 25%, 30% and 35% BW day?1) and to satiation, three times a day for 40 days. Fish growth rates and survival were extremely poor at 10% feeding level, and improved significantly with increasing feeding levels up to 30%, and levelled off with further increase in feeding levels. On the contrary, feed conversion ratio (FCR) and protein production value (PPV) were negatively correlated with feeding level. The lowest feeding level (10%) produced significantly lower body lipid and higher protein and ash than other feeding levels. The present results suggest that the optimum stocking density and feeding level of Nile tilapia fry are 5 fry L?1 and 30% per day respectively. 相似文献
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9.
A. F. Abdel-Fattah D. A. Zaki M. Edrees 《Plant foods for human nutrition (Dordrecht, Netherlands)》1975,24(3-4):311-316
Pectin was found in the fruits ofDovyalis caffra W. (3.7%). Acid hydrolysis of the isolated pectin material afforded galacturonic acid (63%), galactose (26.8%), arabinose (2.13%), xylose (1.42%), and rhamnose (0.3%). With sugar and acid, pectin gave a gel of 100-grade. The fruits were shown to contain 15 combined amino acids. Glutamic acid, aspartic acid, and leucine comprised 28.25, 13.56, and 10.60% of the total amino acid content, respectively. 相似文献