Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"lutein"”.
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Lutein and α-tocopherol biodistribution in animal models
… functions in the human body. The carotenoid lutein is prevalent in green leafy vegetables and is one of the most abundant carotenoids in serum and tissues. Of particular interest for this thesis, lutein may have critical roles in visual and cognitive functions; αT may help maintain …
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Effects of Dietary Lutein on the Parsnip Webworm, Depressaria Pastinacella (Lepidoptera: Elachistidae)
I examined lutein sequestration by sixth instars from populations in western North America that experience different UV intensities, as well as host plant furanocoumarins. Total furanocoumarins and total linear furanocoumarins were negatively correlated with UV irradiance (UVI), whereas total …
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The independent and interactive influence of lutein and choline on cognitive control
… cortical accumulation of the dietary components lutein and choline have been linked with benefits for cognition across the lifespan. This Dissertation work utilized three aims to investigate the impact of both independent and interactive dietary consumption and biomarker concentrations of these …
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Functional characterization of pH and ultrasound treated soy protein based nanoemulsions with lutein
Delivery of lipophilic bioactives such as lutein and vitamin D into food products is challenging due to their poor water solubility. In recent years, the use of nanoencapsulation to deliver similar fat soluble bioactives has gained more attention. It is important to find a suitable, easy and cost …
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The Antioxidant Function of Lutein in Controlling Photo-Oxidation of a Colloidal Beverage System
… (12 hr, 25°C), was investigated. The addition of lutein to provide protection against photo-oxidation of susceptible compounds also was investigated. Fluorescent light-exposure (14 d, 4°C) of the control beverage system led to a decline in sensory quality based on triangle test results. Sensory …
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DOSE RANGING STUDY OF LUTEIN SUPPLEMENTATION IN ELDERLY WITH AND WITHOUT AGE RELATED MACULAR DEGENERATION
… with a high intake of two dietary carotenoids, lutein and zeaxanthin that accumulate in the human macula, are at a reduced risk of AMD. Possible role of lutein and zeaxanthin in the prevention of AMD has been attributed to their antioxidant function and their ability to act as optical filters. …
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Stability and esterification of lutein in bread wheat during post harvest storage in comparison with banana.
Lutein is an important micronutrient for humans as well as being the primary contributor to the pale creamy to yellow colour of bread wheat and durum based products but tends to be unstable against heat and UV light. During post harvest storage of bread wheat grain some of the lutein may be …
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Lutein, Zeaxanthin, and Omega-3-fatty acids: Sources, Intakes, Bioavailability, and Associated risk for Age-related Macular Degeneration
There is overwhelming evidence supporting lutein and zeaxanthin as beneficial to eye health. Age-related Macular Degeneration (AMD), one of the leading causes of blindness in Australia and globally, has been associated with inadequate dietary lutein (L) and zeaxanthin (Z) intakes. This study aimed …
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Release, Stability and Functionality of Nanodelivered Hydrophobic (Lutein and Beta-Carotene) and Hydrophilic (Folic Acid) Antioxidants Using Zein Nanoparticles
… to improve chemical stability of entrapped lutein, and to slowly release lutein under PBS conditions. Same particles enhanced functionality by means of protecting antioxidant activity of entrapped -carotene in the presence of milk as food matrix under simulated gastrointestinal …
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Macular pigment optical density and academic achievement among preadolescent children
Lutein has been shown to preferentially accumulate in the macula of the neural retina as macular pigment and across all brain cortices of infants and adults. This preferential accumulation in the brain has led to the hypothesis that lutein may positively impact cognition, possibly through its …
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Impact of macular pigment optical density on photophobia threshold
<p>Two carotenoids, lutein and zeaxanthin, accumulate in the central retina where they are collectively referred to as macular pigment (MP). By absorbing short-wavelength light, MP may attenuate photophobia (PP)---visual discomfort induced by normal light exposure---for targets composed of …
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Investigating determinants of macular pigment optical density and macular pigment distribution in adults aged 45--73: Can enhanced analytical techniques improve the ability to predict macular pigment status?
… detected for dietary intakes of the carotenoids lutein and beta-cryptoxanthin based on FFQ results Additional nutrients with multiple significant associations were vitamins A and C, and iron.</p><p>Mean serum lutein and lutein/zeaxanthin concentrations for the sample were significantly associated …
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Promotion of Value-Added Uses of Soybeans
… for a different trend in tocopherols and lutein was observed between low-linolenic and regular fatty acid soybeans, but the limited study size prevented a definitive conclusion. This work was the basis for further studies on low-linolenic soybeans not included in this report. Subsequently, …
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Polymorphism in Hawkmoth caterpillars - an ecological and biochemical study of crypsis in Smerinthus Ocellata (L.) and Laothoe Populi (L.)
… in the food of both species of caterpillar, lutein, is sequestered by the insects in the integument and contributes to the animal's coloration. Cis-lutein is also present in small quantities in the integuments of both L. populi and S. ocellata caterpillars. Yellow-green L. populi larvae …
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Characterization of ethanol induced protein gels by ultra-small angle x-ray scattering and rheological measurements
… mechanism was utilized for stabilization of lutein-in-safflower oil emulsions in whey protein gel matrix. Stabilization of droplets were achieved for both nanoscale and microscale droplets. As the process does not involve any heat treatments, lutein was well-preserved throughout the process. …
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Eating quality and variability in carotenoid content and profiles in winter squash and sweet potato
… important carotenoids. beta-carotene, lutein, and neoxanthin were the predominant carotenoids identified in both winter squash species using HPLC. Lutein and zeaxanthin were present in the Cucurbita maxima cultigens and violaxanthin and alpha-carotene were present among Cucurbita …
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Assessment of methods to screen for carotenoids in yellow-fleshed potato germplasm
… The correlation coefficient values (r) for lutein vs. chroma (r = 0.56, P < 0.01), zeaxanthin vs. chroma (r = 0.60, P < 0.01) and total carotenoid vs. chroma (r = 0.63, P < 0.01) were considered moderate. A metabolite mass fingerprint for each replicated sample was collected via REIMS to …
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ULTRASONIC APPLICATIONS- PHYTOCHEMICAL ANALYSES OF SOME MEDICINAL NATURAL PRODUCTS IN FOOD PLANTS
… to optimize ultrasonic-assisted extraction of lutein and β-carotene from spinach. Further, the identities and purity of the natural products in the TLC spots were assayed using matrix-assisted laser desorption/ionization time-off-light mass spectrometry (MALDI-TOF MS) analysis. The optimal UAE …
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INTERRELATIONSHIPS BETWEEN MACULAR CAROTENOIDS, RETINAL MORPHOMETRY, AND COGNITIVE FUNCTION IN PERSONS WITH MULTIPLE SCLEROSIS
… have gained substantial attention. Recently, lutein and zeaxanthin, dietary xanthophylls, have been shown to be associated with cognitive health. Although xanthophylls are not recognized to be essential, their lack of endogenous de novo synthesis necessitates regular dietary consumption to …
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Laying-Sequence Variation in Yolk Carotenoids of Eastern Bluebirds
… in the egg yolks of Eastern Bluebirds: lutein, β-carotene, zeaxanthin, astaxanthin, and β-cryptoxanthin. As predicted, the egg mass, egg length, and egg width did not vary significantly across the clutch.</p>
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