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Friday, July 24, 2020 | History

2 edition of Influence of isolated alfalfa coumestrol on growth of lambs found in the catalog.

Influence of isolated alfalfa coumestrol on growth of lambs

Alan Volker Bahn

Influence of isolated alfalfa coumestrol on growth of lambs

by Alan Volker Bahn

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  • 12 Currently reading

Published .
Written in

    Subjects:
  • Sheep -- Physiology.,
  • Sheep -- Feeding and feeds.,
  • Estrogen -- Physiological effect.

  • Edition Notes

    Statementby Alan Volker Bahn.
    The Physical Object
    Pagination55 leaves, bound :
    Number of Pages55
    ID Numbers
    Open LibraryOL14285047M

    Alfalfa has been around for centuries and is an overlooked wonder food. It is helpful for just about all kinds of health problems, especially those caused by nutritional deficiencies. Historically, the benefits of alfalfa were discovered centuries ago by Arabian horsemen who, upon feeding this wild edible to their livestock, noticed a jump in.   Coumestrol has long been known as the phytoestrogenic compound in alfalfa. However, it has been demonstrated that the ethyl acetate extract of alfalfa sprout (AEA) attenuated the disease severity and increased survival and life span of autoimmune-prone MRL-lpr/lpr mice. Coumestrol, on the contrary, decreased the survival.

    Alfalfa Stand, % of control From: Seguinet al., 60 70 80 90 Location 1 Location 2 Location 3 Year 1 Year 2 Figure 8. Influence of year and location on autotoxicity after reseeding alfalfa into a field that previously was in alfalfa. Consistent results were obtained at Location 1, but results at Locations 2 and 3 varied with year.   Feeding growing lambs with total mixed rations contains around 30% of NDF would be lead to obtain a suitable rumen characteristics, microbial fermentation, growth performance and consequently higher profit compared to a traditional feeding with alfalfa hay and barley.

    alfalfa. Pelleting PM-alfalfa resulted in pellets having similar (P > ) palatability to naive sheep as pellets prepared from AM-alfalfa. Inclusion of PM-alfalfa in receiving diets fed to ewe lambs resulted in greater consump-tion of alfalfa stem fractions (P. alfalfa seedlings. Alfalfa plants sur-vive cold temperatures by pulling the lowermost buds below ground to form a crown. This process, called contractile growth, begins two to six weeks after germination. To allow enough time for crown development, avoid seeding after the recommended late-summer planting dates. Plants that have not formed a.


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Influence of isolated alfalfa coumestrol on growth of lambs by Alan Volker Bahn Download PDF EPUB FB2

Influence of isolated alfalfa coumestrol on growth of lambs Public Deposited. The objective of the thesis was to determine the effects of isolated coumestrol on the growth, carcass characteristics and certain organs of wether lambs. The first of two trials was conducted over an eight week period with two groups of heavy wether : Alan Volker Bahn.

Influence of isolated alfalfa coumestrol on growth of lambs. Abstract. Graduation date: The objective of the thesis was to determine the effects of\ud isolated coumestrol on the growth, carcass characteristics and\ud certain organs of wether lambs.

The first of two trials was conducted\ud over an eight week period with two groups of. alfalfa coumestrol added in varying concen- trations to a low-coumestrol basal meal and finally, the fourth trial superimposed isolated alfalfa coumestrol on a basal diet. Details of the Influence of isolated alfalfa coumestrol on growth of lambs book are presented below.

T~ial I (). Alfalfa meal samples from 5-ton lots were collected from eight different. AN ABS TRAC T OF THE THESIS OT' @AIan Volker Bahn for Date thesis is presented Title INFLUENCE OF the M.

in i5;g,"") Anirnal Nutrition Novernber 9, (Major) ISOLATED ALFALFA COUMESTROL ON GROWTH OT' LAMBS Abstract approved jor profes br) The objective of the thesis was to determine the effects of isolated cournestrol on the growth, carcass characteristics and.

Lucerne meals with 35 or 98 ppm coumoestrol were given with ground barley and cane molasses to 2 groups each of 5 wethers and 5 ewe lambs for 8 weeks. Wethers gained significantly more and ewes significantly less on the hay with more coumoestrol than on that with less.

Carcase composition was similar on both diets but rib roast from those getting more hormone was significantly tenderer and Cited by: alfalfa. Stage 6: Late flower The alfalfa plant has more than two nodes with open flowers. No seedpods are visible.

Seed production Stage 7: Early seedpod The alfalfa plant has one to three nodes with green, spiral-shaped seedpods. Pods first appear from the mid-portion to the base of the main stem while upper nodes are still flowering. Coumestrol, which was first identified from alfalfa inis a kind of pterocarpan possessing benzofuran and benzopyran rings.

The original study with the isolated compounds was carried out from a medical perspective, focusing on their antioxidant activity. Fed coumestrol doses of 0– mg/kg ovulation depressed 34%; lambing %. dose linearly related to no. of ovulations from to [51] primiparous ewes up to mg/kg coumestrol.

Fifty Hu male lambs (aged three to four months with a body weight of ± kg) were chosen to study the effects of supplementation with dietary alfalfa saponins (AS) on growth performance, nutrient digestibility, and plasma parameters.

Lambs were assigned to five groups with 10 lambs per group in a completely randomized design. The isolation of coumestrol from forage crops by workers at the Western Regional Research Laboratory (Bickoff £t al., ) has led to an interest in studying high-coumestrol alfalfa meal as a possible growth proraotant in beef cattle and sheep.

In trials where lambs were fed varying amounts of lucerne that contained coumestrol, progressing from lucerne meals through acetone extracts of different coumestrol potency to a final test of isolated coumestrol, a trend toward a positive growth response to elevated coumestrol levels was obtained with wether lambs, but not with ewes.

Flavonoids, secondary plant metabolites which mainly have a polyphenolic structure, play an important role in plant-microbe communications for nitrogen-fixing symbiosis. Among 10 polyphenolic compounds isolated from soybean roots in our previous study, coumestrol showed the highest antioxidant activity.

In this study, its effect on the soybean nodulation was tested. Coumestrol produced by alfalfa (Medicago sativa L.) can reduce the ovulation rate of ewes. This study isolated agronomic factors that affect coumestrol levels in alfalfa.

Fungal diseases explained. Grazing ewes on lucerne crops that contain elevated coumestrol concentrations before and during their mating period can decrease ovulation rate, which results in fewer multiple birth lambs.

In this experiment, the ovulation rate of ewes grazing a moderately oestrogenic ( ± mg coumestrol/kg DM) lucerne crop for 6 weeks was compared with those transferred to grass pasture for 1 or 3. initial growth in the spring. Alfalfa plants use. FIGurE The young alfalfa plant undergoes a growth phase known as contractile growth.

This process in alfalfa involves a change in the shape of cells in. the hypocotyl or seedling axis below the cotyledons and upper portion of the primary root from long and narrow to short and wide, as a.

Coumesterol is originally isolated from alfalfa (Bikoff et al. ), but later soybeans and clover contain the highest concentrations of this molecule. Biosynthesis of coumestrol in soy is proposed based on the feeding experiments of labeled precursors to a coumestrol. Alfalfa originated from the Mediterranean basin and southwest Asia (Iran, Afghanistan) and was one of the first forage crops to be domesticated (Cook et al., ).It is now cultivated worldwide, from 36°S to 58°N and from sea level up to m (Ecoport, ).The USA is the main producer of alfalfa, and the crop is common in many parts of Europe as well as in the Middle-East, Africa, South.

The survival rate of newborn lambs of the control and treated groups is given in Table IV. The higher values for the survival rate of the newborn lambs were found in lambs born from ewes fed with T2 compared with the control and T1 at weaning.

The effect of feeding regimen on the body weight and average daily gain is given in Tables V and VI. affect the rate of growth of cattle () and sheep (, ). Al­ though later results suggested that coumestroI was not the caus­ ative agent, coumestrol did im­ prove the quality of the meat ob­ tained from sheep ().

In addition to coumestrol, seven other coumestans have been isolated from alfalfa (Med'i­ cago sativa) (41). Coumestrol (15) was identified in the leaves of soybean (Glycine max), and it was found to be the most potent component in the inhibition activity on yeast α-glucosidase among the isolated polyphenols (Yuk et al., ) with IC 50 value of 6 μM.

However, there is no data for its inhibition activity for mammal α-glucosidase. Dolichandroside A (16) and aloe saponarin II (17) isolated from.

Alfalfa (/ æ l ˈ f æ l f ə /), also called lucerne and called Medicago sativa in binomial nomenclature, is a perennial flowering plant in the legume family is cultivated as an important forage crop in many countries around the world. It is used for grazing, hay, and silage, as well as a green manure and cover name alfalfa is used in North America.Core Ideas Alfalfa cultivars still produce coumestrol contents detrimental to ewe trol increased simultaneously across alfalfa of different development trol related.Growth environment, harvest management and germplasm impacts on potential ethanol and crude protein yield in alfalfa.

Biomass and Bioenergy63, DOI: /oe