Phd thesis on xylanase

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Phd thesis on xylanase

Download 1MB Abstract The objectives of the studies conducted in the Part A of this thesis were to quantify the variation of digestible energy DE content of wheat and to document the responsible factors for the variation.

The general hypothesis tested in Part A of this thesis was that the variety, growing region, growing season, supplementation of xylanase and postharvest grain storage i. Experiment 1 Chapter 3 examined the variation in the chemical composition of wheats as influenced by variety Arrino, Westonia and Stiletto were selectedgrowing region each wheat was selected from a high, medium and low rainfall regionseason and and post harvest storage for 6 months.

The major experimental findings were: In Experiment 2 Chapter 4the effect of variety, growing region and growing season on the DE content of wheat in 5-week-old male weaner pigs was examined, and Summary III correlations between various chemical composition of wheat and DE content were established.

The major findings were: However, such relationships were not significant inindicating a very strong seasonal influence on both chemical composition and DE content of wheat.

Phd thesis on xylanase

Experiment 3 Chapter 5 examined the effects of a supplemental enzyme xylanase and storage for 6 months on the DE content of wheats. Inuse of the enzyme tended to increase the DE content from However, the response to enzyme addition was much greater in some wheats grown in some regions than others, suggesting that the DE response to xylanase supplementation was not systematic but appeared to be associated with the grain structure, with the DE content consequently arising from an interaction between variety and growing conditions of the wheat.

For wheats harvested instorage improved the E content from However, the data need to be interpreted with caution because some of the wheats were infested with weevils. The addition of xylanase in stored wheat did not improve the DE content, suggesting changes in chemical composition eg, activation of xndogenous xylanases during storage.

In Experiment 4 Chapter 6the same wheats were analysed or phosphorus P and hytate-P content, as the latter is considered to be anti-nutritive in pig diets.

The total P and phytate-P content of all wheat samples ranged 2. Endogenous phytase activity was highly variable and averaged 63 s. The variety, rowing region, season and storage of wheat did not influence the variation of P content. In Part B, two experimental designs were generated based n the results of experiments described in Part A.

From the previous experiment Experiment 2, Chapter 4it was evident that the structure of starch i. To reinforce the established correlations the following experiments were carried out, with the general hypothesis that the structure of starch i.

Diets were formulated and then fed to weaner pigs weeks of age with or without xylanase plus beta-glucancase. Digestibilities of starch, nitrogen, energy, and DE content of diets were measured at day 7 and day 21 to examine any age-related improvement of nutrient digestibilities during the first 3 weeks post-weaning.

However, energy digestibility and DE content of the diet were not influenced by either wheat type or particle size.

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Supplementation of xylanase plus? However, the improvement in nutrient digestibilities in waxy and fine particle size wheat diets did not translate to improved pig performance. In Experiment 6, the hypothesis tested was that the digestibility and pig performance responses to supplemental xylanase, phytase and xylanase plus phytase would differ in weaner pigs according to P content of wheat.

Phd thesis on xylanase

To test this hypothesis, two wheats containing high and low levels of total P 2. Diets either had no enzyme or were supplemented with xylanase, phytase, or a combination of xylanase plus phytase. The hypothesis was partly supported in this experiment, since P and Ca digestibility were influenced by a wheat content by enzyme ineraction.

Overall improvements in macronutrient digestibility and pig performance by supplementation of various enzymes were not significant.

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Amounts of P and Ca digested were below the recommended requirements by NRC in the first two weeks of the feeding trial.

However, xylanase plus phytase supplementation did not produce synergistic effect for macronutrients, and mineral digestibilities, over single supplementation of xylanase or phytase. From the results obtained in this thesis I propose that:zika virus fashion research papers project management review of literature xylanase summer holiday homework thinking in nursing education workbook importance of literature review in education research phd thesis defense.

Production of xylanase by Aspergillus niger and evaluation of the enzymatic hydrolysis of corn cob by High Hydrostatic Pressure. Stirred tank reactor, airlift and column bioreactor operation in different fermentation modes for xylitol production.

Cum Laude PhD thesis: “Xylitol production from advanced fermentation technologies from corn Connections: PROFESSOR PANNA THAPA, BPharm MPharm PhD DOB: 19 April Sex: Male. Nationality: Nepalese. PhD Thesis 1. Thapa, P. PhD Thesis titled‘Studies of a Lyophilised Nasal delivery System’, xylanase from Brevibacillus Borstelensis – MYCC isolated from soil sample of eastern Nepal.

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OSDI Mba Thesis Online:: Write my college essay for me I thought I could paper on mapping the happening in between of are ready to help. I thought mba thesis online . Apr 01,  · Xylanase activity was higher in the peripheral layers of the trenches, at moderately high temperatures (48 to 68°C), than in the hottest central layers (70 to 78°C).

Optimal temperature for the xylanases was between 60 and 80°C at pH 6, depending on the temperature of the sampling site.

Cellulose Chemistry and Technology