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 41 for “"Gram-positive and Gram-negative bacteria"”.
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A controlled in vitro study of the effectiveness of Alepidea amatymbica herbal tincture and homoeopathic dilutions (01 and 06) against Gram-positive and Gram-negative bacteria
Mini-dissertation submitted in partial compliance with the requirements for the Master's Degree in Technology: Homoeopathy, Durban Institute of Technology, Durban, South Africa, 2003.
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A controlled in vitro study of the effectiveness of Withania somnifera herbal tincture and homoeopathic dilution (1X and 6X) against selected gram-positive and gram-negative bacteria
Mini-dissertation submitted in partial compliance with the requirements of the Master's Degree in Technology: Homoeopathy, Durban Institute of Technology, Durban, South Africa, 2003.
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Αντιμικροβιακή δράση φαινοθειαζινικών παραγώγων (χλωροπρομαζίνης-προμεθαζίνης)
This work examines the in vitro antibacterial action of phenothiazines choropromazine and promethazine in gram positive and gram negative bacteria and their interaction with antibiotics.
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A study of the phylogenetics, nutrition and one-carbon metabolism of Syntrophococcus sucromutans
… sucromutans is phylogenetically included in the Gram-positive phylum of the Eubacteria, by virtues of 16S ribosomal RNA sequence similarity analysis. It is part of a well defined genealogic entity described as the Butyrivibrio subdivision which, like the Sporomusa subdivision contains both …
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Synthesis of an isotopically labelled analog of the antimicrobial peptide ll-37
… Its mechanism of action is by disruption of the bacterial cell membrane structure. LL-21 is a simplified form of the peptide that contains only the core portion of LL-37, which retains antimicrobial activity and is easier to synthesize. We synthesized an 15N –Val-labeled LL-21 peptide which …
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ANTIMICROBIAL ACTIVITIES OF HISTIDINE-RICH GLYCOPROTEIN AND CATIONIC PEPTIDES
… is of importance for organisms to mount a fast and effective defence. Antimicrobial peptides are ancient and integral effector molecules of the innate immune system. They are found in all kinds of species from bacteria to plants and animals, indicating their importance during evolution. They …
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Development of an Improved Synthesis of S-D-Ribosyl-L-Homocysteine (SRH) and Progress Toward SRH Analogs Modified at the C3 Position
<p>Quorum sensing is a system that facilitates bacteria turning on and off gene expression depending on population density. System 2 quorum sensing is utilized by both Gram positive and Gram negative bacteria, and the quorum sensing molecule used in this system is AI-2. AI-2 is biosynthesized by …
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Isolation of novel antibiotic producing microorganisms from invertebrates
… of this research were to investigate terrestrial and aquatic invertebrates as a source of antibiotic producing microorganisms, to isolate the organisms and screen them for activity against Gram-positive and Gram-negative bacteria. Those with activity would be further characterised. Forty-seven …
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Development of a Gram-type Specific Method for Detection of Bovine Mastitis Pathogens by Combining Loop-mediated Isothermal Amplification (LAMP) and Split Trehalase Technologies
… from intramammary infections (IMI) caused by Gram-positive or Gram-negative bacteria, is a huge burden on the global dairy industry. Oftentimes the presence of an infection can be deduced by measuring the somatic cell count (SCC) or released enzymes, or directly detected by the presence of …
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Identification and functional study of a novel bioactive peptide QUB-1761 from the venom of the Brazilian yellow scorpion, Tityus serrulatus
… synthesis (SPPS), followed by purification and confirmation through reversed-phase high performance liquid chromatography (RP-HPLC) and matrix-assisted laser desorption ionisation-time of flight mass spectrometry (MALDI-TOF MS). In broth microdilution assays, QUB-1761 had strong inhibitory …
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Impacto da resistência bacteriana no combate das infecções relacionadas à assistência à saúde.
… or infected patients may become contaminated by bacteria and it constitutes a secondary deposit, which favors cross-transmission. Thus, there is the emergence of new strains that produce enzymes such as extended-spectrum beta-lactamases (ESBL), AmpC and carbapenemases, especially KPC-1 and NDM, …
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A novel dermaseptin peptide from the defensive skin secretion of Phyllomedusa camba
… or the skin secre-tions of Phyllomedusa species and other related frogs and they all possess strong an-timicrobial activity with little or no haemolytic activity, which made it possible for the dermaseptin peptides to be considered for clinical development. Phyllomedusa frog skins and their …
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Functionalized Polyisobutylene: From Synthesis to Properties and Applications
… chemical stability, impermeability to gases, and biocompatibility in certain applications. However in some applications it is limited by properties such as high hydrophobicity, lack of chemical functionalities, and the adsorption of proteins and organisms to its surface. Butyl rubber (IIR) is …
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Identification and bioactivity assessment of an antimicrobial peptide from the defensive skin secretion of the northern leopard frog, Rana pipiens
In response to the growing threat of bacterial resistance, antimicrobial peptides (AMPs) have emerged due to their broad-spectrum activity and low probability of resistance generation. In many ways, antimicrobial peptides have advantages that are difficult to match with antibiotics, and so research …
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A novel bioactive peptide QUB-2022 from the skin secretion of Phyllomedusa bicolor
… as a fundamental component of innate immunity and have been extensively discovered in the insects and other non-vertebrate organisms. Amphibian skin secretions are also known to be a rich source of AMPs. They possess broad-spectrum action on killing both Gram-positive and Gram-negative …
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A proteomic and cytological characterisation of the buff-tailed bumblebee (Bombus terrestris) fat body and haemolymph -An immune perspective
Bees, including solitary and social, native and managed, are vital insect pollinators that provide essential ecosystem services. Bombus terrestris (Linnaeus) is a widespread and important bumblebee pollinator of wild and cultivated crops and although found commonly across Europe, is available …
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Automated synthesis and evaluation of potential new anti-microbial agents
… was prepared in an automated fashion, and tested against Mycobacterium fortuitum in a rapid screen for antimycobacterial activity. Many of the compounds from this series were also tested against Mycobacterium tuberculosis, and the usefulness as M.fortuitum as a rapid, initial screen for …
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Investigation of microbicidal activity of surface-immobilized hydrophobic polycations
… polycations have been shown to completely kill bacterial, fungal, and viral pathogens, on-contact. Herein we describe advances with this technology on two fronts: (1) innovation of a polycationic-derivative that simplifies the labor-intensive covalent-immobilization procedure, and (2) …
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A STUDY OF THE MICROORGANISMS INHABITING ROTATING BIOLOGICAL CONTACTOR BIOFILMS DURING VARIOUS OPERATING CONDITIONS
… combination of complex interrelationships among bacteria, protozoa, and metazoa and their perceived environment. Since very little information is available on the microorganisms inhabiting the biofilms, the major objective of this research was to increase the understanding of the biological …
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Assessment of antimicrobial and antiproliferative activities of a bioactive peptide from the skin secretion of white-lined leaf frog
… working as intended, such as breathing, water and temperature regulation, but mainly in defending against carnivore attack and bacterial infections. The most effective way to prevent microbial resistance is the destruction and permeability of microbial cell membranes, because the component of …
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