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Articles 31 - 36 of 36
Full-Text Articles in Nanotechnology
Assembly Of Nucleic Acid-Based Nanoparticles By Gas-Liquid Segmented Flow Microfluidics, Matthew L. Capek, Ross Verheul, David H. Thompson
Assembly Of Nucleic Acid-Based Nanoparticles By Gas-Liquid Segmented Flow Microfluidics, Matthew L. Capek, Ross Verheul, David H. Thompson
The Summer Undergraduate Research Fellowship (SURF) Symposium
The development of novel and efficient mixing methods is important for optimizing the efficiency of many biological and chemical processes. Tuning the physical and performance properties of nucleic acid-based nanoparticles is one such example known to be strongly affected by mixing efficiency. The characteristics of DNA nanoparticles (such as size, polydispersity, ζ-potential, and gel shift) are important to ensure their therapeutic potency, and new methods to optimize these characteristics are of significant importance to achieve the highest efficacy. In the present study, a simple segmented flow microfluidics system has been developed to augment mixing of pDNA/bPEI nanoparticles. This DNA and …
Mechanical Reliability Of Implantable Polyimide-Based Magnetic Microactuators For Biofouling Removal, Christian G. Figueroa-Espada, Qi Yang, Hyowon Lee
Mechanical Reliability Of Implantable Polyimide-Based Magnetic Microactuators For Biofouling Removal, Christian G. Figueroa-Espada, Qi Yang, Hyowon Lee
The Summer Undergraduate Research Fellowship (SURF) Symposium
Hydrocephalus is a neurological disorder that typically requires a long-term implantation of a shunt system to manage its symptoms. These shunt systems are notorious for their extremely high failure rate. More than 40% of all implanted shunt systems fail within the first year of implantation. On average, 85% of all hydrocephalus patients with shunt systems undergo at least two shunt-revision surgeries within 10 years of implantation. A large portion of this high failure rate can be attributed to biofouling-related obstructions and infections. Previously, we developed flexible polyimide-based magnetic microactuators to remove obstructions formed on hydrocephalus shunts. To test the long-term …
Design And Development Of A Plasmid Vector For Protein Expression And Purification, Mahima Grover, Craig Sweet, David H. Thompson
Design And Development Of A Plasmid Vector For Protein Expression And Purification, Mahima Grover, Craig Sweet, David H. Thompson
The Summer Undergraduate Research Fellowship (SURF) Symposium
Production and isolation of proteins are difficult, costly and time-consuming processes. The aim of this project is for the development of plasmids, which allow for streamlined production and isolation of proteins. To allow for modular insertion of varying segments of DNA we are using ‘recursive directional ligation by plasmid reconstruction’. This technique uses type II restriction endonucleases, which cut downstream from their recognition site allowing multiple insertions without losing a restriction site. Using this process, we can ligate multiple DNA sequences together and express them to be able to construct a scar less fusion protein. In order to accomplish this, …
Using Collagen Binding Poly(N-Isopropylacrylamide) Nanoparticles To Prevent Intravascular Platelet Adhesion And Activation, Anna E. Searle, Alyssa Panitch, James Mcmasters
Using Collagen Binding Poly(N-Isopropylacrylamide) Nanoparticles To Prevent Intravascular Platelet Adhesion And Activation, Anna E. Searle, Alyssa Panitch, James Mcmasters
The Summer Undergraduate Research Fellowship (SURF) Symposium
Balloon angioplasty, the most prevalent non-surgical treatment for Atherosclerosis, damages the endothelial layer of the artery, baring an underlying collagenous layer, which causes platelet adhesion and activation and eventual thrombosis and intimal hyperplasia. Previous work in our lab has used a collagen-binding peptidoglycan, dermatan-sulfate-SILY (DS-SILY), that has been shown to bind to type I collagen and prevent platelet adhesion and activation. Our goal is to fabricate nanoparticle-SILY by cross-linking SILY to a poly(N-isopropylacrylamide) (NIPAm) nanoparticle instead of a DS backbone, while retaining the SILY’s high collagen binding affinity and platelet inhibition capacity observed in DS-SILY. Using a biotin-streptavidin assay, we …
Formation Of Lactalbumin Nanoparticles By Desolvation Method, Menglu Gao, Jozef Kokini, Luis Fernando Maldonado-Mejia
Formation Of Lactalbumin Nanoparticles By Desolvation Method, Menglu Gao, Jozef Kokini, Luis Fernando Maldonado-Mejia
The Summer Undergraduate Research Fellowship (SURF) Symposium
Protein nanoparticles are ideal carriers for bioactive compounds such as nutraceuticals and drugs because they are biodegradable, less immunogenic and non-toxic and can be nanoparticulated. This study focuses on the desolvation method to form lactalbumin protein nanoparticles. Lactalbumin is soluble in water and insoluble in many organic solvents. Different solvent/non-solvent ratios are evaluated in this research project for the effect they have on the size, PDI and stability of protein nanoparticles. Different methods including sonication and centrifugation were used and compared in terms of their effectiveness to produce small nanoparticles during fabrication of the nanoparticles. Data collected including protein nanoparticles …
Cellular Uptake Of Drug Nanocrystals, Alexandra R. Seybold, Tonglei Li, Yan Chen
Cellular Uptake Of Drug Nanocrystals, Alexandra R. Seybold, Tonglei Li, Yan Chen
The Summer Undergraduate Research Fellowship (SURF) Symposium
Systemic toxicity and poor solubility of existing chemotherapeutic drugs piqued an interest in the use of nanocrystals for chemotherapy. To increase cytotoxicity, surface coating of nanocrystals is of interest to enhance tumor targeting and reduce treatment toxicity. As such, we tested in this project various coated paclitaxel nanocrystals on cancer cells for determining the efficacy of surface coating. An IC50 assay was chosen to determine the cytotoxicity of surface-coated paclitaxel nanocrystals; the lower the IC50 value, the higher the efficacy of the drug. Using the Sulforhodamine B method, paclitaxel, paclitaxel nanocrystals, and polymer coated paclitaxel nanocrystals were tested …