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 25 for “"β-lactoglobulin"”.
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β-lactoglobulin and lactoferrin complex coacervates: Characterization and putative applications as encapsulation device
… the mechanism of complex coacervation between β-lactoglobulin (β-LG) and lactoferrin (LF) in the absence and presence of small ligands. The conditions of optimal β-LG - LF coacervation were found at pH range 5.4-6 with a molar excess of β-LG. Remarkably, LF showed selective coacervation with β-LG …
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The impact of genetic variation on functional, technological and digestive properties of β-lactoglobulin
… and κ-casein) and the two main whey proteins, β-lactoglobulin (β-lg) and α-lactalbumin. In the early 1990’s, it was speculated that certain genetic variants of β-casein could be associated with negative health effects, including heart disease, diabetes and schizophrenia. While no scientific …
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Influence of Protein Concentration on Heat-Induced Aggregation and Subsequent Functionality of Whey Proteins
… increasing the ratio of α-lactalbumin to β-lactoglobulin significantly (P < 0.05) reduced the level of large soluble aggregates formed on heating, improved emulsion stability and reduced apparent viscosity during concentration. Differences in these physicochemical properties are attributed …
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The impact of protein polymorphism, bovine feeding strategy and consumption temperature on the in vitro digestion behaviour of selected dairy products
… of this thesis showed a significant effect of β-lactoglobulin genetic polymorphism on both the rheological properties, and subsequent digestion of skim milk yogurt. Milk that contained exclusively β-lactoglobulin B (BB) was found to form a stronger gel with lower levels of syneresis compared to …
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Extracellular amino acid effects on milk protein synthesis and free amino acid pools in cultured rat and bovine mammary cells
… .05) increased β-casein and to a lesser degree β-lactoglobulin synthesis by bovine mammary cells in culture. Individually increasing each of the 13 amino acids in MEM 3-fold showed cystine followed by threonine and then methionine significantly (P < .05) increased the combined synthesis of …
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Interaction between membrane and protein properties on flux decline during sterile microfiltration
… (PVA). Feed streams consisted of lysozyme, β-lactoglobulin and ovalbumin. The pH values of the solution were set at the isoelectric point of each of the proteins (11.0, 5.8, and 4.7 respectively). The experiments were operated with a feed pressure of 2 or 10 psi. Each of the proteins was …
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Determination of optimum amino acid complement for milk protein synthesis in the dispersed rat mammary cell culture
… studies indicated that: 1) synthesis of β-lactoglobulin and β-casein in response to the labeled amino acids were significant (P<.05), 2) cell numbers between 6 x 10⁶ to 6 x 10⁷ did not significantly (P>.05) alter the rates of the milk protein synthesis, and 3) the response of amino acid …
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Interfacial properties of saponins from Quillaja saponaria Molina and their functionality in dispersed systems
… in pH and ionic strength and interactions with β-lactoglobulin were discussed using spectroscopic equipment and knowledge on molecular structure. Saponins are phytochemicals that can be found in numerous plant species in low concentrations. Due to their amphiphilic structure, saponins are surface …
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Chemical and physical changes resulting from UHT treatment of milk
… patterns of UHT treated milk showed that β-lactoglobulin was the most heat sensitive serum protein, and these patterns were used as an index to heat treatments. Alpha-lactalbumin was not denatured by the applied UHT treatments. The immunoglobulins were partly denatured, but a progressive …
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Effects of Two Proteins from Whey as an Oil Barrier in the Production of Deep-Fried Chicken
… as 37%. WPI consists primarily of the proteins β-lactoglobulin (β-lg, 50-55%) and Α-lactalbumin (Α-la, 20-25%). The objective of this thesis was to improve a treatment to reduce oil absorption in fully fried, battered, and breaded chicken using solutions containing WPI, Α-la and β-lg. When applied …
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Methods for study and manipulation of protein self-assembly
… maintaining their characteristic properties. β-lactoglobulin proteins are electro spun into free-standing and surface deposited fibres with micron diameter and centimetre length. Structural, mechanical, and optical characterisation methods are used to demonstrate the fibres’ high mechanical …
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Effect of phospholipase C papain on feathering defect in 11% homogenized UHT processed cream
… (butyrophilin) was hydrolyzed by papain while β-lactoglobulin was not degraded in papain-treated cream About 65-70% of phospholipid in the membrane material was degraded when 0.75 EU of phospholipase C was inoculated to 11% homogenized UHT processed cream and incubated at 4 and 21°C for 14 days. …
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A dairy-based beverage development by alpha-lactalbumin/beta-lactoglobulin ratio adjustment for dysphagia patients
… Three ratios of α-lactalbumin (α-la)/β-lactoglobulin (β-lg) (3:8, 1:1 and 8:3) were used to prepare the milk systems. These ratio adjusted milk systems were either processed at 70, 80, and 90ºC for 30 min or at 25ºC, and cooled to 25 ± 1ºC. After the process was completed, the milk …
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Studi ed approfondimenti sulla composizione in acidi grassi del latte bovino di razza Reggiana con diverso fenotipo per k-caseina e Beta-lactoglobulina
… using cows of differing κ-casein (κ-Cn) and β-lactoglobulin (β-Lg) phenotypes was investigated. Statistically significant results regarding the associations between milk fatty acid composition and κ-Cn phenotype were found, in particular, κ-Cn BB seems to influence de novo fatty acid synthesis …
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Controlled self-assembly of natural proteins into hierarchically structured functional materials
… obtained from a milk-derived protein, β-lactoglobulin. The fibres were generated using a miniaturized fluidic device, which enables precise control of the hydrodynamic forces applied to the nanofibrils and thus replicates the natural spinning process of silk. By varying the flow rates, …
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Studies on equine milk and comparative studies on equine and bovine milk systems
… protein, lack of a sulphydryl group in equine β-lactoglobulin and a very low level of κ-casein on the physico-chemical properties of equine milk are reported. This thesis provides an insight into the stability of equine casein micelles to heat, ethanol, high pressure, rennet or acid. Differences …
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Terahertz spectroscopy to explore the role of vibrational dynamics in systems with varying structural order and disorder
… was applied to two other proteins, namely β-lactoglobulin and bovine serum albumin, and the interactions with the surrounding salt solution were found to strongly depend on the protein characteristics. Crystallisation dynamics in aqueous solution were studied using THz-TDS in a transmission …
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Computational methods in palaeoproteomics: making the most of mass spectrometry data
… identifying a single degraded protein, bovine β-lactoglobulin (BLG). BLG was experimentally degraded by heating, and the resulting peptides were analysed using LC-ESI MS/MS. The study explores different database choices (targeted dairy vs. whole bovine proteome), digestion options (tryptic, …
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The Effect of Sodium Hexametaphosphate on Cottage Cheese Yields
… lost in the whey are mainly -lactalbumin and β-lactoglobulin, which remain soluble during the conditions of cottage cheese manufacture and thus do not become part of the curd (38, 39). Although these proteins have the highest known nutritional value (21, 22, 45, 60, 71), they can be an added …
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