Dissertation submitted in partial compliance with the requirements for the Master's Degree in Technology: Homoeopathy, Durban Institute of Technology, 2002. / The aim of this in vitro microbial study was to evaluate the efficacy of Calendula officinalis tincture 60% (v/v) ethanol as an antibacterial on in vitro Pseudomonas aeruginosa. The standardised disc - diffusion method was employed. Seven pairs of Mueller - Hinton agar plates were used. / M

Four strains of Listeria monocytogenes (LCDC 81-861, ATCC 19115, M1 and M2) examined in pure culture behaved similarly when exposed to a concentration of 0.5% CharSol C-10 liquid smoke by reducing Listeria numbers to an undetectable level within 4 hours post treatment. However, at the lower concentration of 0.25% liquid smoke, differences in resistance to the antimicrobial properties of smoke components become evident among these strains indicating that a level of 0.5% liquid smoke is more effective in controlling this organism. CharSol C-10 liquid smoke was used as a full strength dip treatment for beef franks surface inoculated with six strains of L. monocytogenes (LCDC 81-861, ATCC 19115, M1, M2, M5, and C6) then vacuum packaged and stored at 4 ± 1°C for 72 hours. Beef franks dipped in CharSol C-10 liquid smoke exhibited a significant (P < 0.001) reduction in L. monocytogenes numbers after 72 hours of storage at both inoculum levels of 1 x 10³ cells/ml and 1 x 10⁵ cells/ml.

No description available.

No description available.

University of Macau / Institute of Chinese Medical Sciences

Dissertation (Ph.D.)--Auburn University,2006. / Abstract. Vita. Includes bibliographic references (p.138-140).

published_or_final_version / Dentistry / Master / Master of Dental Surgery

published_or_final_version / Medical Sciences / Master / Master of Medical Sciences

M. Tech. Chemical Engineering / Cement based materials are of enormous technological importance and their satisfaction depends on being able to transport and mould them in the freshly mixed state. The problem of the degradation or concrete is of interests to modern society, not only in terms of money, but in terms of discomfort and safety. Global research show concrete consumption around the world to be second only to water. The situation clearly indicates the significance and the huge role concrete has in the construction industry and in the global economy. This work was to investigate the various methods of increasing the life span of concrete without compromising its properties. The techniques for improving the physical properties of concrete and the effect of bacterial biofilm were studied especially for sanitary floors of food processing industries. The aim of this study is to improve the physical, mechanical and microbial properties of concrete floors in food processing industries by extending the life span of concrete materials.

AlcellRTMlignin has been used commercially in adhesive preparation and brake pad linings and experimentally in animal feeds to reduce or eliminate diarrheal attacks in farm animals. Our study dealt with elucidating the antibacterial effect of AlcellRTMlignin. It would appear that adsorbance of E. coli cells to AlcellRTMlignin particles is not essential for destruction of the organism. / The antibacterial activity was delayed by the inclusion of Mg 2+ ions in the AlcellRTMlignin filtrate or in the enumeration medium (BHIA). Addition of bile salts to the enumeration medium (BHIA) enhanced the culturability loss of E. coli cells suspended in the filtrate of AlcellRTMlignin. Using FTIR methodology, it appears, that compounds of AlcellRTMlignin affect phospholipid-phospholipid and/or phospholipid-protein interactions in bacterial membranes, causing the patching of membrane phospholipids and proteins. / Additional studies are necessary to evaluate interactions of compounds of AlcellRTMlignin with bacterial cells.