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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Development of a Chinese version of the movement specific reinvestmentscale

Wong, W. C., 黃偉祖. January 2003 (has links)
published_or_final_version / Sports Science / Master / Master of Science in Sports Science
22

The costing of container liner service

Hung, Wing-chun., 洪榮川. January 1999 (has links)
published_or_final_version / Transport Policy and Planning / Master / Master of Arts
23

Antioxidant potential of yeast containing beer

Morris, Edward E. 07 March 2003 (has links)
It has been suggested that cellular damage from oxygen radicals is one of the processes leading to cardio-vascular disease and cancer. Natural antioxidants prevent uncontrolled oxidative reactions by decreasing molecular oxygen levels, scavenging chain-initiating and chain-propagating free radicals, chelating metals, or decomposing peroxides. Beer is rich in antioxidants, derived both from malt and hops, consisting mostly of flavanoids and phenolic secondary plant metabolites. Much research has been conducted concerning antioxidant activity of beer in relationship to flavor stability. Yeast cells possess both enzymatic and non-enzymatic antioxidant systems to defend against oxygen radicals, in addition to scavenging and absorbing molecular oxygen for cell synthesis. It is well known that bottle-conditioned beer has a longer shelf life than conventional beer in terms of flavor stability and freshness. This is likely due to a complex relationship between the yeasts inherent ability to scavenge oxygen species, produce SO₂, chelate transition metals and employ other methods to defend against molecular oxygen. The objective of this research was to determine whether bottle-conditioned beer (which contains live yeast) has a higher antioxidant activity compared to that of conventional beer. Initial experiments were conducted to establish a baseline of antioxidant potentials. The first experiment consisted of determining the antioxidant potential of commercially available beers and how those values compared to common foods and drinks. Next, live yeast was added to commercially available artificially carbonated beer, to determine whether the presence of live yeast alone had an impact on antioxidant potential. Lastly, in the first set of beer trials wort was prepared, brewers yeast added, and then allowed to complete primary fermentation. The beer was bottle-conditioned (naturally carbonated) by the addition of a second yeast strain and either a 'high' or 'low' level of sugar, or artificially carbonated. Treatments consisted of using three different yeasts. A control was prepared by artificially carbonating beer without live yeast. Antioxidant potentials were determined using Ferric Reducing Antioxidant Potential (FRAP) analysis. Results indicated that there was an increase in the level of antioxidant activities between the bottle-conditioned beers compared to the control beer, whether or not the high or low level of yeast was present. In the second set of beer trials wort was prepared, brewers yeast added, and then allowed to complete primary fermentation, as in the first set of beer trials. The beer was bottle-conditioned by the addition of a second yeast strain and sugar, or artificially carbonated followed by the addition of a second yeast but no sugar. Treatments consisted of using three different yeasts. A control was prepared by artificially carbonating beer without live yeast. Dissolved oxygen, free and total sulfite, yeast viability, and antioxidant capacities were again determined. Results indicated that there was an increase in the level of sulfite, a decrease in dissolved oxygen, yeast remained viable for a longer period of time, and antioxidant activities were higher in the bottle-conditioned beers when compared to the control beer. Furthermore, while the differences were not as great, the same trends were observed for all parameters when comparing the artificially carbonated beers containing live yeast to the control beer. The elevation in antioxidant activities of beer with live yeast present (live beer) was significant. The third and final phase of experiments focused on the contribution of antioxidant potential specifically from the yeast. Yeast cells for each strain were cultivated in beer wort, harvested, washed, and cell extracts prepared. The crude yeast extracts were subjected to heat treatment, size fractionation followed by heat and protease treatments, glutathione determination, and lipid extraction, and then analyzed for antioxidant activity. Results indicated a complex interaction between many different yeast components that contributed to the total antioxidant activity provided specifically from yeast. Rather than one single compound, the yeast contributed heat stable components, consisting of proteins and enzymes, molecules with high, medium, and low molecular weights, and active lipid portions. The overall results suggest, that while the malt and hops components likely play the major role in antioxidant activity of beer, beer containing live yeast has a significant increase on that antioxidant activity. Consequently, the flavor stability and health benefits from beer containing live yeast would be increased. / Graduation date: 2003
24

Bayesian economic cost model for a variable sampling plan for fraction defective and manufacturing process control.

Jalbout, Fouad Noaman. January 1989 (has links)
Acceptance sampling plans by variables are a basic quality control technique. These plans provide economical procedures to determine the acceptability of batches of product. Most of these plans are based on a single quality characteristic and are of the classical type. This work concentrates on Bayesian variable acceptance sampling plans for fraction defective. Both destructive and non-destructive sampling procedures are considered. A set of decision points are estimated and employed to make decisions about the inspected lots. Techniques to dispose of the rejected lots are provided. Components of the expected total cost relative to various decisions are estimated. The sample size required to obtain the expected optimum cost is found. An untrue assumption implicit in the measurement of the quality characteristic of items sampled is that the observed dimensions are error free. The distributions, means, and variances of a set of parameters for error free and error prone sampling is listed. Computer programs written in FORTRAN 77 are developed to compute the decision points and the costs for both destructive and nondestructive testing. Precise Bays estimate of the costs and other economic parameters involve the moments of the fraction defective p raised to the kᵗʰ power. Mathematical expressions for the conditional expectations of p|x and p|ẋ are derived and a computer program to estimate these moments is provided. Producing quality items with minimum cost requires keeping a production process under control. The quality characteristic X of each item produced is determined and the sample means are plotted on an Ẋ-control chart. A production process is assumed to start in control at time t = 0 with specific values of the mean and standard deviation. The occurrence of a single or multiple cause-failures shift the process mean outside the control limits. During the search for the causes of failure, the process is either allowed to continue in operation or shut down until the assignable cause or causes are discovered. The expected duration of time during which the process is shut down and the additional time to be taken to repair the process are considered. Computer programs are provided to estimate the optimal sample size, the interval between successive samples, the control limits, the probability of type I error, the power of the chart, and the average time the process operates in the presence of an assignable cause. The parameters estimated are employed to estimate the optimal loss-cost. The economic design of Ẋ -charts assumes one quality characteristic of interest. However a product quality in most industrial products and processes is characterized by more than one quality characteristic where the application of a Ẋ -control chart for each variable is inappropriate. In this work a Hotellings T² control chart is employed to handle cases of where products are tested relative to several quality characteristics.
25

PERCEPTIONS OF THE PREGNANT WOMAN WITH DIABETES.

Dolberry, Jacqueline Karma. January 1982 (has links)
No description available.
26

EFFECTS OF ASCORBIC ACID ON CAFFEINE PHARMACOKINETICS IN YOUNG AND AGED GUINEA PIGS.

Hochman, David. January 1982 (has links)
No description available.
27

LIFE SATISFACTION AND THE RETIRED MAN.

Peperzak-Blake, Yvonne Marie. January 1983 (has links)
No description available.
28

VENTILATORY AND LACTATE THRESHOLDS DURING SUPINE AND UPRIGHT CYCLING.

Karst, Gregory Mark. January 1984 (has links)
No description available.
29

THE EFFECT OF THERAPEUTIC TOUCH ON ANXIETY AND WELL-BEING IN THIRD TRIMESTER PREGNANT WOMEN

Nodine, Janet Lynn January 1987 (has links)
This study was conducted to determine whether or not a significant difference exists in pregnant women among those receiving therapeutic touch, mock therapeutic touch, or no touch on measurements of anxiety and well-being. Thirty third trimester primigravida subjects were tested pre- and postintervention using the State-Anxiety Inventory and a Well-Being Visual Analog; heart and respiratory rates were monitored before, during, and after the treatment. No significant differences were found using analysis of covariance with the pre-test scores as the covariate. The findings indicate that therapeutic touch may not be useful in reducing state anxiety or enhancing subjective well-being in pregnancy. Study limitations include a small sample size, use of an instrument without established reliability and validity, and a study environment that may have increased anxiety.
30

Natural Healing In Biblical Perspective: It's Contribution to Health Care

Lysander, Nesamoni 09 1900 (has links)
Permission from the author to digitize this work is pending. Please contact the ICS library if you would like to view this work.

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