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 396 for “"Lactic acid"”.
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Study of poly (l-lactic acid)/poly (d-lactic acid) stereocomplex as nucleating agent for poly (l- lactic acid) crystallization
Poly (lactic acid) (PLA) is a biodegradable polymer with good renewability and processability. However, it has some drawbacks. The Poly (lactic acid) (PLA) stereocomplex formed via the interaction between optical isomers Poly (L-lactic acid) (PLLA) and Poly (D-lactic acid) (PDLA), provides …
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Investigation of exopolysaccharide production by lactic acid bacteria.
… drinks products. For many years EPS producing lactic acid bacteria have been used by the dairy industry as a thickening agent in the production of yoghurt. However, this EPS producing trait is unstable and is readily lost which can cause an alteration in the texture of the final product. It was …
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Lactic Acid Production Using Sweet Potato Processing Waste
… of useful compounds via fermentation (e.g. lactic acid), resulting in the production of value-added products. The goal of this research project is to produce a substrate from the sweet potato processing waste material that supports the growth of lactic acid bacteria, which results in the …
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Investigation of storage polysaccharide metabolism in lactic acid bacteria
… glgD Gens in einigen Michsäurebakterien (lactic acid bacteria, LAB) gerichtet. LAB sind eine Gruppe von fakultativ anaeroben, nicht pathogenen, nicht sporenbildenden grampositiven Bakterien mit wichtigen Funktionen für die menschliche Gesundheit und die Lebensmittelindustrie. Die …
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The polymerization of lactic acid anhydrosulphite by anionic initiators
… of 5-methyl-1;3, 2-dioxathiolan-4-one-2-oxide (lactic acid anhydrosulphite (LAAS)) using anionic initiators under various conditions. Poly(lactic acid) is a biodegradable polymer which finds many uses in biomedical applications such as drug-delivery and wound-support systems. For such …
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Characterisation of glycosidase enzymes of wine lactic acid bacteria
… has lesser drawbacks compared to methods such as acidic hydrolysis or heating. Given the particular nature of glycosides in wine, attention has to focus on five glycosidase enzymes: β-D- glucopyranosidase, α-D-glucopyranosidase, α-L-rhamnopyranosidase, α-L arabinofuranosidase and …
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Recovery of lactic acid from fermentation broth by electrodialysis
… of utilizing electrodialysis (ED) to recover lactic acid from fermentation broths to enhance the productivity of the fermentation and reduce downstream processing costs.
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Biopolymer foams from Novatein thermoplastic protein and poly(lactic acid)
… polymer with good mechanical properties, polylactic acid (PLA). Blending two components can lead to poor mechanical properties of the blend due to weak interfacial adhesion and thermodynamic incompatibility. These problems can be overcome with the use of a compatibilizer which helps to …
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Cloning, expression, and characterization of lactic acid bacteria recombinant prolidases
Lactobacillus plantarum (Lb. plantarum) NRRL B4496 and Lactococcus lactis (Lc. lactis) NRRL B1821 prolidase genes were isolated, cloned, and sequenced. The sequence-confirmed genes were subcloned into the expression systems. The recombinant prolidases from the pKK223-3 systems were purified through …
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Production of lactic acid by microbial fermentation of hemicellulose sugars
Lactic acid (2-hydroxypropionic acid) is an organic acid which has wide applications in food feed, pharmaceutical industries as well as producing polylactic acid, which is a biodegradable material. Lactic acid is commercially produced by microbial fermentation from starchy materials. Converting …
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Microcapsule Containing Lactic Acid Bacteria for Treatment of Peptic Ulcers
… thought to protect the probiotics from stomach acid and delivers the treatment to the affected area. To ensure this microencapsulation treatment is affective, the microcapsules will be stained and imaged to see if the microcapsules are constructed in a way which is consistent with the theory: a …
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Dynometrics : an innovative lactic acid measurement solution for endurance athletes
… We have developed the first wearable lactic acid meter that works in real time and does not require a single drop of blood. This thesis will outline our business plan for this product by analyzing our market, competitive positioning, product roadmap as well as defining our customer, …
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Functional application of lactic acid bacteria exopolysaccharide in complex food systems
Lactic acid bacteria expolysaccharides (LAB-EPS), in particular those formed from sucrose have the potential to improve food and beverage rheology and enhance their sensory properties potentially replacing or reducing expensive hydrocolloids currently used as improvers in food and beverage …
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Phase transitions of poly (l-lactic acid) in bulk and in solution
Poly(L-lactic acid) (PLLA) has been subject to intensive research in recent years because of its biodegradability. Applications of PLLA, such as porous tissue engineering scaffolds and excipients for controlled release, have been developed in the biomedical and pharmaceutical fields. The crystal …
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The use of lactic acid bacteria as methane mitigation strategies in ruminants
Lactic acid bacteria (LAB) have often been cited as potential strategies for the reduction of methane emissions from ruminants, however more research is needed to identify whether LAB can be an effective methane mitigation option in ruminant livestock. The aim of this thesis was to investigate the …
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Efficacy of Ultraviolet Radiation to Control Lactic Acid Bacteria in Wine Must
… (UV<sub>c</sub>) radiation to control lactic acid bacteria (LAB) in wine production was studied. A simulated wine sterilizer was built using a commercially sourced ultraviolet (UV) sterilizer commonly used in aquariums and ponds. After growing cultures in test tubes, samples of five …
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