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.
Results
Showing 1 to 19 of 19 for “"ζ-potential"”.
-
Non-ionic surfactant vesicles as an Amphotericin B inhaled delivery system for the treatment of leishmaniasis
… on the basis of their vesicle size, ζ-potential, entrapment efficiency and viscosity. High performance liquid chromatography (HPLC) methods were validated and used to quantify the formulation constituents (AmB, cholesterol, surfactant and dicetyl phosphate) in stability studies. AmB-NIV …
-
Biosynthesis and characterization of silver nanoparticles by fungi
… σκέδαση φωτός (DLS) και μετρήσεις ζ-δυναμικού (ζ-potential). Οι βέλτιστες συνθήκες για την αναπαραγωγική εξωκυτταρική σύνθεση AgNO₃ καθορίστηκαν ως η χρήση του ενζυμικού υδατικού διηθήματος του μύκητα σε pH 7 και 50 °C, συγκέντρωσης 10 ppm του AgNO₃ υπό μαγνητική ανάδευση για χρονικό διάστημα 3 …
-
Effects of acid hydrolysis conditions on cellulose nanocrystal yield and properties: A response surface methodology study
… were CNC yield, sulfate group density, ζ-potential, z-average diameter, and Peak 1 value. The CCD proved suboptimal for this purpose because of the extreme reaction conditions at some of its corners, specifically (1,1,1) and (–1,–1, –1). Both models predicted maximum CNC yields in excess …
-
Flotation of sulfide minerals with alkyl pyridinium salts
… be explained by the reduction in the negative ζ-potential of the sulfide mineral upon adsorption of cetyl pyridinium ions, which, in turn, minimizes the electrostatic component of the disjoining pressure of the wetting film. CpCl has also demonstrated a remarkable selectivity despite the fact …
-
Development and evaluation of amphotericin B Loaded iron oxide nanoparticles for targeted drug delivery to systemic fungal infections
… size, poly dispersity index (PDI), and ζ-potential using dynamic light scattering (DLS) technique, morphology with transmission electronic microscopy (TEM), and in vitro drug release profile with dialysis method were evaluated. Second, uptake (with fluorescence microscopy and flow …
-
Application of Soluble Whey Protein-Carboxymethylcellulose Complex in Emulsion and Acid-induced Gelation
… to 5.2. Emulsions were assessed by measuring ζ-potential, droplet size, creaming stability, rheological properties, and protein surface coverage. At proper concentration, emulsions containing high Mw CMC (2,500k) were the most stable and showed no separation even after 15-day storage. In the …
-
Applications and Methods for Increased Liberation and Separation in the Deinking of Recycled Paper Fiber
… the degree of liberation of oil-based ink by ζ-potential measurement. The same method has been used to determine the degree of liberation of water-based ink. It has been found that adding a polyelectrolyte during the pulping stage greatly increases the liberation by increasing the disjoining …
-
Emulsion Polymerization Using Switchable Surfactants
… content on the resulting particle size and ζ-potential was carried out, showing that a wide range of particle sizes (40 – 470 nm) can be obtained. It was found that as the basicity of the surfactant decreased, the particle size generated from emulsion polymerization increased. Destabilization …
-
Toxicity and drug delivery ability of bio-inspired silica nanoparticles
… focused on the use of bio-inspired silica as a potential drug delivery agent and the toxic effect produced due to their small size. Using two bio-inspired drug encapsulation methods and a range of amines the encapsulation and release profiles of hydrophilic Calcein and hydrophobic Nile Red, …
-
A fundamental study of the selective hydrophobic coagulation process
… or electrolytes. The coagulation occurs at ζ-potentials significantly higher than those predicted by the classical DLVO theory, suggesting that it is driven by a hydrophobic interaction energy. Thus, the process is referred to as the selective hydrophobic coagulation (SHe) process. The …
-
Cellulose Nanocrystals: Size Characterization and Controlled Deposition by Inkjet Printing
… surface free energy, polarity, roughness, ζ-potential, and surface charge distribution in air by X-ray photoelectron spectroscopy, contact angle measurements, AFM, streaming potential, and scanning Kelvin probe microscopy (SKPM). Additionally, poly(ethylene glycol)-grafted glass substrates …
-
Development and Evaluation Of HIV gp120 Responsive Microbicide Formulation for the Prevention of HIV Sexual Transmission
… (TIB 71)] cell lines. 𝐶+𝑀𝑅𝑃 average size and ζ-potential were 1130±15.72 nm [PDI = 0.153] and 15.1±0.55 mV, (n=3). Similarly, 𝐶−𝑀𝑅𝑃 average size and ζ-potential were 1089±23.33 nm (n=3) and -14.2±0.25 mV (n=3). Tenofovir (TFV) encapsulation efficiency in CaCO3 was 74.4% with drug loading of …
-
Formulation of Hyaluronidase Enzyme Sensitive Topical Nanomicrobicides for HIV Virus Transmission Prevention
… Y₂; polydispersity index: PDI and Y₃; zeta (ζ) potential: (mV). The cross-linking efficiency of NPs was characterized by Fourier Transform Infra-Red (FT-IR), and ¹³C-nuclear magnetic iv resonance (NMR) analyses. When formulated with X₁; 2.49 mM, X₂; 9.96 mM, X₃; 60 mL, X₄; 6 h, the HA-NPs …
-
Development and Validation of a Simulator based on a First-Principle Flotation Model
… various chemistry parameters such as zeta-potentials, contact angles, surface tension in addition to the physical and hydrodynamic parameters such as particle size, bubble size, and energy dissipation rate. In the present work, the effects of both hydrodynamic and chemistry parameters have …
-
Carbon Nanotubes in Cancer Therapy
… and enter cells consequently having the potential as vehicles for drug delivery. Polyethylene glycol (PEG400) and Pluronic®F127 (PF127) functionalized SWNTs and MWNTs have been investigated in this study for in vitro cancer therapy. Both have demonstrated high tumour suppression efficacy …
-
Preparation of Pentablock Nanomicellar Formulations for Prostate Cancer Drug Delivery Systems
… ± 2.5nm, 25.5nm ± 5.00nm, respectively, and ζ-potential for both PTX-PBNM and DOX-RA/PBNM was around zero, while PTX PBNM-Ab had -28mV. In vitro release studies revealed that pentablock nanomicelles released PTX at a slow first order rate. The DOX-RA/PBNM released doxorubicin slowly in …
-
Reconstruction of milk fat globules/membrane (MFGs/MFGM) and characterization of its physicochemical properties and techno-functionalities
… milk, showing lower interfacial tension and ζ- potential. In addition, there were no apparent polymorphs in MFGM-C, and lower exothermic or endothermic enthalpy was needed during the heating and quenching procedures. Acidification, especially pH 6.30 conditions, led to the adsorption of …
-
An investigation into the precipitation of Fe(III) oxyhydroxides in lime neutralization processes
… HDS process is affordable to operate and has the potential benefit of the Fe(III) oxyhydroxide precipitates removing other pollutants through coprecipitation and adsorption, but it has its own shortcomings. These include, but are not limited to, the tendency of lime to be affected by armouring …
-
Harnessing the optical properties of gold nanorods: fluorescence enhancement, biosensing and photothermal therapy
… tunable optical properties, gold nanorods have potential application in solar cells, sensing, bioimaging, drug delivery, and cancer therapy. Excitation of a gold nanorod localized surface plasmon resonance (LSPR) can result in the enhancement of many photophysical processes such as light …