排序方式： 共有10条查询结果，搜索用时 31 毫秒
1
1.
Résumé Le taux d'azote des Raygrass, Fléole, Dactyle, Fétuque, Trèfle, Luzerne, décroît beaucoup au cours du développement, mais le taux de lysine, par rapport à (N×100/16), est relativement constant, de l'ordre de 7%; le taux de cystine est variable, compris entre 0,7 et 0,3% et plus faible chez le trèfle (0,3 à 0,2); la méthionine est au taux de 1,8 à 2% chez les graminées; 1 à 1,3 chez les légumineuses.L'azote protéique est toujours plus élevé (69 à 80%) % de l'N total dans les feuilles que dans les tiges (40 à 67%) ou les racines (16% chez les betteraves). Les aminoacides libres (luzerne, raygrass, choux, betteraves) comprennent partout alanine, sérine, valine, acide aminobutyrique; asparagine, acide aspartique, sont abondants chez Luzerne et Raygrass; glutamine et acide glutamique chez Choux et Betteraves. — Les acides malique (le plus important), malonique (à taux élevé dans feuilles et tiges agées), citrique, quinique, ont été dosés chez la luzerne, les acides malique, citrique, quinique, chez le Raygrass.
Avec la collaboration technique de MmeJ. Boudon et de MllesR. Chabrier, V. Goujon, E. Penot. 相似文献
Summary The content in nitrogen of Rye-grass, timothygrass, Cocksfoot, fescuegrass, clover, lucerne, decreases during the development, but the content in lysine, in relation to (N×100/16), is relatively constant, near 7%; the rate of cystine is variable, comprised between 0,7 and 0,3%, weaker in clover (0,3 to 0,2); methionine is at the rate of 1,8 to 2% in gramineous plants; 1 to 1,3 in leguminous plants.Protein nitrogen is always higher (69 to 80%) in leaves than in stems (40–67%) or in roots (16% in beets). Free aminoacids (lucerne, rye-grass, cabbages, beets) everywhere include alanine, serine, valine aminobutyric acid; asparagine, aspartic acid are abundant in lucerne and rye-grass; glutamine and glutamic acid (the most important), malonic (high rate in well developped leaves and stems), citric, quinic acids have been determined in lucerne, malic, citric and quinic acid in rye-grass.
Zusammenfassung Der Stickstoffgehalt folgender Gräser: Raygrass, Lieschgrass, Knauelgrass, Schafgrass, Klee, Lucerne, nimmt während des Wachstums stark ab, der Lysin-Gehalt, im Vergleich zum Protein-Gehalt (N×100/16) bleibt ungefähr konstant, mit Werten 7%; der Cystin-Gehalt schwankt zwischen 0,7 und 0,3% und ist noch niedriger beim Klee (0,3 bis 0,2%); Methionin 1,8 bis 2% bei den Gräsern, 1 bis 1,3% bei den Leguminosen.Der Eiweiss-Stickstoff liegt immer höher in den Blättern (69–80%) als in den Stengeln, (40–67%) und in den Wurzeln (16% bei der Rübe). Die freien Aminosäuren (Luzerne, Raygrass, Kohl, Rübe) sind überall: Alanin, Serin, Valin, -Aminobuttersäure; Asparagin und Asparaginsäure wurden in grösserer Menge bei Luzerne und Raygrass gefunden; Glutamin und Glutaminsäure, sind bei Kohl und Rübe zu finden. Äpfelsäure, (die wichtigste Säure), Malonsäure (ziemlich hoher Gehalt in den gut ausgebildeten Blättern und Stengeln), Zitronensäure und Chinasäure wurden bei der Luzerne bestimmt; Äpfelsäure, Zitronensäure, Chinasäure, wurden beim Raygrass ermittelt.
Avec la collaboration technique de MmeJ. Boudon et de MllesR. Chabrier, V. Goujon, E. Penot. 相似文献
2.
A method for the direct measurement of plasma amino acid flux, in rainbow trout, using the continuous infusion of L-[U-14C]-leucine with ALZET mini-osmotic pumps implanted into the peritoneal cavity, was developed. The fish were fed successively
on three different diets (a commercial control diet, a semi-purified diet and a purified diet) during the 4 weeks of experiment.
The amounts of radioactivity in the free pool and the protein of both the plasma and skin mucus were measured in these fish.
The total flux of leucine was calculated either from the specific activity of leucine in the plasma (61.8 mg leucine. 100
g-1.d-1) or from the amounts of labelled and unlabelled leucine flowing into the skin mucus protein (61.5 mg leucine. 100g-1.day-1). The total plasma flux was not affected by changes in the diet. The contributions of total leucine oxidation and whole body
protein turnover to plasma leucine flux (80% and 20% respectively) were estimated in fish fed the semi-purified diet. 相似文献
3.
Fillet texture and muscle structure in brown trout (Salmo trutta) subjected to long-term exercise 总被引：1，自引：0，他引：1
Brown trout (Salmo trutta) (2.7 g initial mean weight) were reared in freshwater for 8 months at water velocities of <0.1 (control group), 1 or 2 body lengths per second (BL s?1) (exercise groups). Growth (body weight, body length and body width), muscle structure (muscle fibre diameter and width of myosepta) and flesh quality parameters (dry matter, muscle pH, collagen content and solubility, instrumental evaluation of texture) were measured at the end of the experiment. The body weight of fish at 1 BL s?1 was 22% higher than the control group. Muscle development was stimulated at 1 and 2 BL s?1, leading to a higher condition factor, greater body height and width, and muscle fibre hypertrophy (55 vs. 59.5 μm fibre diameter in the control and 2 BL s?1 groups respectively). Connective tissue and collagen were only slightly affected by exercise (no difference in collagen solubility, but a greater proportion of γ trimer and fewer α chains in the control compared with the exercised group). Flesh quality was affected, with greater dry matter content and lower post‐mortem pH in the 1 BL s?1 group compared with the control and 2 BL s?1 groups. The mechanical resistance of the raw fillets was slightly but significantly increased by exercise. The exercise‐related changes in muscle structure and texture are discussed. 相似文献
4.
Intestinal microbiota in rainbow trout,Oncorhynchus mykiss,fed diets with different levels of fish‐based and plant ingredients: A correlative approach with some plasma metabolites 
下载免费PDF全文
下载免费PDF全文 F.‐J. Gatesoupe B. Fauconneau C. Deborde B. Madji Hounoum D. Jacob A. Moing G. Corraze F. Médale 《Aquaculture Nutrition》2018,24(5):1563-1576
5.
Thermal denaturation and aggregation properties of Atlantic salmon myofibrils and myosin from white and red muscles 总被引：1，自引：0，他引：1
Lefevre F Fauconneau B Thompson JW Gill TA 《Journal of agricultural and food chemistry》2007,55(12):4761-4770
Thermal denaturation and aggregation abilities of salmon myofibrils and myosin were studied measuring turbidity, intrinsic fluorescence, 8-anilino-1-naphthalene sulfonic acid binding, and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide cross-linking. The thermal behaviors of protein preparation from white and red muscles were compared, and the relationship with thermal gelation properties is discussed. The low gelation ability of salmon muscle proteins was related to a limited extent of protein denaturation and aggregation upon heating. These properties seemed to be carried by myosin molecules as a similar behavior was observed for both myofibrils and myosin preparations. The higher thermal stability observed for red muscle proteins with higher transition temperatures in rheological profiles was related to a shift to higher temperature in denaturation and aggregation processes. The extent of denaturation and aggregation was very similar for both muscle types as was the final rigidity of the gels formed. 相似文献
6.
The development of feeding behaviour in two rainbow trout strains and their hybrid was compared at the transition from endogenous nutrition to exogenous feeding. After 60 min of acclimatization, the swimming pattern, spatial distribution, agonistic behaviour and snapping of fish were quantified by making 5-min observations on groups of five fish. Behavioural patterns were recorded in four replicate groups per treatment, before and after the introduction of dry trout feed or Artemia nauplii (actometric tests) or extracts of these (olfactometric tests). Fish of the slow growing strain were less active than those of the other two strains. Greater swimming activity observed in the fish of the fast growing strain was associated with more rapid feeding and a higher number of snapping responses. Such behavioural precocity is of interest because it could provide the basis for the growth differences between the fast and slow growing strains. 相似文献
7.
Benoit Fauconneau Marie Paule Mady Pierre Yves LeBail 《Fish physiology and biochemistry》1996,15(1):49-56
This paper reports on the effect of administration of mammalian growth hormone (GH) on muscle protein synthesis as measured in white muscle using the phenylalanine flooding technique. The effect of exogenous GH was compared with that of insulin and prolactin, and with endogenous GH.The rate of protein synthesis in white muscle of rainbow trout 6 h after the injection of bovine GH or bovine insulin was twice (2.6 and 2.9% d–1) that of the control saline-injected fish (1.2% d–1). A metabolic effect of GH, as observed with insulin, is suspected.The rates of change in body weight and body length and the fractional rate of protein synthesis in muscle of rainbow trout were enhanced by mammalian GH administration. The effect of GH on muscle RNA/protein ratios was not significant. An opposite effect of antibodies against salmon GH (Lebailet al. 1989) on growth rate and muscle protein synthesis rate was found in rainbow trout. It is suggested that the effects of exogenous and endogenous GH on capacity and efficiency of muscle protein synthesis were similar.The long-term effects of mammalian GH on presmolt Atlantic salmon was also tested. The same trends were found with ovine prolactin supplementation in Atlantic salmon but not as high as those observed with ovine GH. 相似文献
8.
Guy Fauconneau 《Plant foods for human nutrition (Dordrecht, Netherlands)》1983,32(3-4):205-223
The per capita levels of protein from various animal sources and from plant sources which are currently available for human consumption are presented and discussed. Changes in the patterns of consumption which occur as the standard of living is improved are documented for various countries. These patterns are used to suggest that increased production of plant protein alone will not necessarily be a solution to the problem of meeting increasing world needs for dietary protein. Products from plant protein sources need to be developed which will compete with animal protein sources. 相似文献
9.
10.
Concentrations of RNA and DNA, determined in two rainbow trout strains, Cornec and Mirwart, over a period of 9 months, were used to assess and characterize growth potential. More rapid growth and higher muscle nucleic acid concentrations in the Cornac strain trout, suggest a more metabolically active strain with higher rates of protein synthesis. On the other hand, the higher concentration of muscle DNA, in the Cornec strain, suggests a smaller cell size and a larger number of cells per unit weight issue. The faster decrease of DNA concentration, with increasing body weight, in the Mirwart strain, reflected a lower percentage of hyperplasia and consequently a lower capacity for growth. 相似文献
1