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 36 for “"pH change"”.
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pH Change Following Smear Layer Removal and Final Rinse with 95% Ethyl Alcohol Using Calcium Hydroxide Medicament or BC Sealer
Introduction: An in vitro investigation of pH change at the external root surface after final rinse of 95% ethyl alcohol using Ultracal XS, Calasept Plus, or obturation with BC sealer. Methods: 80 single rooted extracted human teeth were decoronated with a standardized root length of 15mm. All root …
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The development of motility in spermatozoa
… This study on rat spermatozoa shows that pH, cAMP and protein kinase C (PKC) all play an important role in the initiation of motility. pH has the most critical role and until the initial pH change in spermatozoa has occurred between the caput and caudal epididymal regions of the rat, …
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Development of a phosphotriesterase enzyme assay for determination of organophosphate pesticides
Phosphotriesterase catalyzes the hydrolysis of a wide range of organophosphate insecticides such as paraoxon and parathion and nerve toxins such as soman and sarin. This project resulted in the development of novel phosphotriesterase enzyme assays to measure paraoxon and other representatives of …
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The physiology of the genus bacillus
… it from the other two factors influencing the pH change in the medium. The pH of the carbohydrate media employed was determined potentiometrically, using a glass electrode in order that the pH produced could be compared with the extent of utilization of these carbohydrates. Likewise, the pH …
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Monitoring single heart cell biology using lab-on-a- chip technologies
… "active" assays, where the cell‘s metabolic and physiological function is itself controlled on-chip. The heart attack is considered the largest cause of mortality and morbidity in the western world. Dynamic information during metabolism from a single heart cell is difficult to obtain. There is a …
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Screening for novel cold-adapted nitrile hydratases in Antarctic metagenornic libraries
… published to date have been isolated from mesophilic and thermophilic bacteria. The aim of this study was to identify a novel cold-adapted NHase from psychrophilic and psychrotrophic bacteria. The identification of a cold-adapted NHase is of interest for its potential use in chemical and …
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The Influence of PVAP on the Stability of Amorphous Solid Dispersions of Itraconazole Produced using Hot Melt Extrusion Technology
… extrusion processability of polyvinyl acetate phthalate (PVAP) and investigate its use as a stabilizing polymer for supersaturated solutions of itraconazole (ITZ) in neutral pH aqueous media and in the solid-state during storage over time. Polyvinyl pyrrolidone vinyl acetate (PVPVA) was …
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A pH Switchable Responsive Surface for the Trapping And Release of a Hydrophobic Substance
<p>Solid phase extraction is one of the most widely used techniques to trap and release compounds in a solution. A hydrophobic substance will stick efficiently to a hydrophobic surface (the “like dissolves like” principle). With an introduced response (i.e. pH change), a responsive surface can …
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Understanding the assembly of simple ssRNA virus nucleocapsids
… critical for nucleocapsid formation until the morphogenesis which occurs at each maturation stage of the virus’s “life” can entail a wide range of possibilities at every given stage. By whatever seeding event initiates the nucleocapsid formation, the nucleocapsid, encasing the nucleic acid, then …
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RAPID COLORIMETRIC IDENTIFICATION OF ESCHERICHIA COLI SHIGA TOXINS 1 AND 2, AS WELL AS EAE AND AGGR, USING LOOP MEDIATED ISOTHERMAL AMPLIFICATION FOLLOWED BY PNA/AUNP DETECTION
… include using LAMP reaction buffer containing a pH indictor dye. This method allows for easy colorimetric detection of LAMP amplicons. If the target sequence was amplified, hydrogen ion release during phosphodiester bond formation will decrease the pH of the reaction. This causes the pH indicator …
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The use of purified enzymes for the early assessment of toxicity
… of three purified enzymes: α-chymotrypsin, acid phosphatase, and carbonic anhydrase for use in the early assessment of toxicants at environmentally significant levels. Activities of α-chymotrypsin and acid phosphatase were measured spectrophotometrically, while carbonic anhydrase activities were …
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NMR Sensing Strategies Based on Modulation of Chemical Exchange Rate With Small-Molecule Synthetic Sensors
… Dynamic processes, such as conformational changes or binding events, can induce drastic effects on NMR spectra in response to variations in chemical exchange rate. Molecular strategies in which the chemical exchange rate is deliberately controlled can lead to attractive opportunities in NMR …
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A Comprehensive Study and Mechanism Investigation for Alkaline-Heavy Oil Recovery Process
… are generated for various emulsification phenomenon. It is known that alkaline flooding performance in oil recovery is subjected to the emulsion type generation, thus, of great importance to alkaline flooding study is its mechanism investigation and saponification rate examination. In this …
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Bijels For Continuous Reactive Separations
… the separation of the product challenging. Biphasic systems comprising two immiscible phases can host both polar and apolar species and at the same time allowing separation of molecules of different polarity by simple phase partitioning. Two forms of biphasic reactive separation systems have …
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The Influence of Selected Novel Glucose -Based Polymers on Nutrient Digestion, Glycemic and Insulinemic Responses, Colonic Fermentation Characteristics, and Ileal and Colonic Microflora Concentrations in the Adult Canine and (Or) Human
… homopolysaccharide of glucose that is an alpha-1,6 linked polymer of maltotriose subunits. Pullulan is synthesized intracellularly and secreted by the fungus Aureobasidium pullulans . Cyclodextrins are cyclic oligosaccharides composed of alpha-1,4-glycosidic-linked glucose residues. There …
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Molecular Dynamics Simulations and Cross-Link Analysis of the Rotary Molecular Motor F(o) of ATP Synthase
… for the generation of the molecule adenosine tri-phosphate (ATP). It consists of two coupled rotary motors, F1 and Fo. ATP is generated via a rotary mechanism that couples the synthesis of ATP in F1 to the proton translocation across Fo which is driven by the electrochemical proton gradient across …
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Separation by enclathration
… properties of the host compounds, 9,9'-(1,4-Phenylene)bis(fluoren-9-ol) (WEB9) and 1, 1,2,2-tetraphenyl-1,2-ethane diol (TPED) were investigated. These host compounds are large, bulky and rigid, they contain functionality that allows them to selectively interact with other molecules, such as …
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Characterization of The Ato Gene Family In Alternative Carbon Metabolism
… of immunocompromised individuals. Macrophages are important innate immune cells that limit the niches in the human body in which <em>C. albicans </em>can persist through phagocytic removal. However, following phagocytosis <em>C. albicans</em> readily escapes from the immune cell by …
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La vicia villosa como cultivo de cobertura : efectos de corto plazo sobre el suelo y la productividad del maíz bajo riego en el valle bonaerense del Río Colorado
… period as well as it can make improvement in the physical and chemical soil conditions for future crops. This change in the edaphic conditions would mean a greater effi-ciency of resources such as water and fertilizers. In order to study both vetch dry matter (DM) production capacity and N …
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Species distribution, phylogenetic structure and functional roles of detritus inhabiting fungi across contrasting aquatic environments
… transferring energy and nutrients to higher trophic levels, and are essential for removing toxic heavy metals and degrading xenobiotics. In light of global climate change, habitat loss, and water pollution, it has become increasingly important to examine this understudied group of fungi. Using …
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