Suspension of concentrated kaolinite (20 g/30 ml-medium) in the presence of polyvinylpyrrolidone (PVP) and sodium lauroyl isethionate (SLI) was allowed to evaluate its degree of dispersion based on their rheological studies. Flow curves at low shear rate, measured by means of cone-plate method, showed a non-Newtonian flow. Plastic viscosity and Bingham yield value were derived from the flow curves. Relative viscosity, effective volume fraction and void fraction of secondary particle were also obtained. Results of dispersity and fluidity of the suspension were explained. PVP acted as a flocculant at a concentration lower than 0.1% but as a dispersant at a higher concentration. The presence of SLI could decrease both the Bingham yield value and suspension viscosity. Cooperative and competitive effects of PVP and SLI were found. Results indicated that SLI enhanced the degree of dispersion of kaolinite when PVP was less than 0.1%. The suspension, however, showed a maximum flocculation (i.e., aggregation) at 4 mM SLI when the concentration of PVP was higher than 0.1%.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1248/cpb.54.1082 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Ethosomes-mediated tryptanthrin delivery as efficient anti-psoriatic nanotherapy by enhancing topical drug absorption and lipid homeostasis.
J Nanobiotechnology
September 2024
Department of Biomedical Engineering and Technology, Institute of Basic Theory for Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
Article Synopsis
- Psoriasis is a chronic skin disease that often doesn't respond well to conventional treatments, leading researchers to explore herbal alternatives like tryptanthrin (Tryp) due to their lower cost and side effects.
- The study introduced ethosomes, a new delivery system that enhances the absorption of Tryp through the skin barrier, utilizing a one-step technique to create a Tryp-loaded ethosome (Tryp-ES) that shows improved drug stability and size consistency.
- In tests on mice with psoriasis, Tryp-ES showed better skin retention and permeation of the drug, leading to significant symptom improvement without harmful side effects, suggesting a promising new approach to treating psoriasis.
Effects of sodium dodecyl sulfate, Sarkosyl and sodium lauroyl glutamate on the structure of proteins monitored by agarose native gel electrophoresis and circular dichroism.
Biophys Chem
November 2024
Alliance Protein Laboratories, 13380 Pantera Rd, San Diego, CA 92130, USA. Electronic address:
We have studied binding properties of three detergents, i.e., sodium dodecyl sulfate (SDS), Sarkosyl and sodium lauroyl glutamate (SLG), to model proteins based on their effects on electrophoretic mobilities of the proteins using agarose native gel electrophoresis and circular dichroism (CD).
View Article and Find Full Text PDFSafety Assessment of Alkanoyl Lactyl Lactate Salts as Used in Cosmetics.
Int J Toxicol
October 2024
Cosmetic Ingredient Review Executive Director.
The Expert Panel for Cosmetic Ingredient Safety (Panel) reviewed the safety of 10 alkanoyl lactyl lactate salts. These ingredients have the surfactant function in cosmetics in common. The Panel reviewed data relevant to the safety of these ingredients, and concluded that these 10 ingredients are safe in cosmetics in the present practices of use and concentration described in the safety assessment when formulated to be nonirritating and nonsensitizing, which may be based on a quantitative risk assessment (QRA) or other accepted methodologies.
View Article and Find Full Text PDFSelf-assembly of choline-based surface-active ionic liquids and concentration-dependent enhancement in the enzymatic activity of cellulase in aqueous medium.
Phys Chem Chem Phys
June 2024
Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
The micellization of choline-based anionic surface-active ionic liquids (SAILs) having lauroyl sarcosinate [Sar], dodecylsulfate [DS], and deoxycholate [Doc] as counter-ions was investigated in an aqueous medium. Density functional theory (DFT) was employed to investigate the net interactional energy (), extent of non-covalent interactions, and band gap of the choline-based SAILs. The critical micelle concentration (cmc) along with various parameters related to the surface adsorption, counter-ion binding (), and polarity of the cores of the micelles were deduced employing surface tension measurements, conductometric titrations and fluorescence spectroscopy, respectively.
View Article and Find Full Text PDFBiodegradable Dextrin-Based Microgels for Slow Release of Dual Fertilizers for Sustainable Agriculture.
ACS Appl Mater Interfaces
March 2024
School of Chemical Sciences and Advanced Materials Research Centre, Indian Institute of Technology, Mandi, Himachal Pradesh 175075, India.
In this research, we report dextrin-based biodegradable microgels (PDXE MGs) having phosphate-based cross-linking units for slow release of urea and a potential P source to improve fertilization. PDXE MGs (∼200 nm) are synthesized by cross-linking the lauroyl-functionalized dextrin chains with sodium tripolyphosphate. The developed PDXE MGs exhibit high loading (∼10%) and encapsulation efficiency (∼88%) for urea.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!